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ICMcompact manual - euro

1. not distorted sine waves To adjust the signal voltage entering SYNC IN to the measured voltage the divider factor DIV can be changed by using the buttons DIV and DIV Holding these buttons will increase the step width Div 1000 Crest 1 41 The voltage frequency and the scaling factor for the displayed waveform are shown in the bottom row together with the peak PD value taken from the AMP IN terminal To select a value Urms U V2 which should be displayed in SCOPE METER or DSO mode switch to MODE H and select the respective value Fig 19 SCOPE display with Usus value Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 29 DIV Changes to the submenu DIV Here the divider ratio of the high voltage divider can be set Cd Changes to the submenu Cd Here the low voltage capacitance can be entered This menu is only visible if one of the three VLF is selected in the menu SYNC MODE Pushing this button changes to the MODE H menu see description below SCOPE DSO or METER Depending on the optional DSO acquisition board this function switches to the next display type SETUP Pushing this button changes to the last selected SETUP menu This menu is only visible if one of the three VLF is selected in the menu SYNC UP DOWN Sets the low voltage capacitance The selected character can b
2. RANGE MODE SLOPE SETUP 50_0Hz EXT 1 0pC 100pC D MAIN M hn OCC la Fig 62 Meter menu with logarithmic scaling RANGE RANGE MODE METER 5U 30pC po 50 0Hz EXT 1 OpC 100pC MAIN S Fig 63 Scope menu with logarithmic scaling Qd 50 0pC GAIN eR La u e l GAIN AR 3UBC Jr RO OHZ EXT 1 0pC 10D0BC Fig 64 Calibration mode Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 required This preamplifier also has the advantage to capture PD signals in a high frequency band 300MHz to 2GHz Since the preamplifier itself has a large dynamic range there is no need for adjusting the gain during measurements Therefor the func tions GAIN and GAIN are replaced by Range and RANGE Using this buttons will not change the amplification of the signal it just changes the range of the logarithmic scaling on the display Figures 62 and 40 shows a 50pC calibration pulse in the meter and scope display mode Since the RPA6C has got a fixed bandwidth of 300MHz to 2GHz the internal filter settings are dis abled Be aware that PD pattern will look different on a logarithmic scaling and need some experience for the analysis While the gain setting is disabled in the measurement menus it is however possible to adjust the internal gain to the application This has to be done before the system is calibrated A l
3. and set the sampling time according to the set VLF The synchronization is done automatically by the SYNC IN input EXIT Pushing this button changes to the setup menu SETUP3 10pC 100pC 1nC 10nC Pushing these buttons sets the level of the analog voltage output RECOUT The scaling Is linear Record button button button button Output 10pC 100pC 1nC 10nC OV Ww o o oe 9 Tab 1 Ranges of the Voltage Output EXIT Pushing this button changes to the setup menu SETUP3 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 27 WIN Pushing this button changes to the menu WIN The firmware window function makes it possible to blind out pulses with respect to their phase position At older devices Firm ware lt 2 00 this function was called GATE MAN AUTO BANDW Gating with an external sensor analog gating is an optional function An ICMcompact with this gating function will have a built in preamplifier RPAG and a GATE IN terminal BNC on the rear panel Please also see chapter 111 5 4 lt lt gt gt Pushing this button widens the window s for blinding out the pulses on the display The width of the windows is displayed at upper right side of the screen gt gt lt lt Pushing this button scales down the window s for blinding out the pulses on the display POS gt gt Pushing thi
4. must be connected to the coupling unit During the calibration the high voltage must be turned off otherwise the impulse generator might be damaged To get continuously new curves on the graph the software must be connected Online and put into the RUN mode While injecting a pulse with the calibrator the gain and the trigger level should be adjusted so that a triggered pulse is seen The range should be adjusted in the way that the first reflection of the pulse at the cable head is seen clearly p 1 Multple Averaging _IF Freeze Inst Display The gray cursor labeled R can now be placed at the beginning of the first pulse which is around 0 0us see fig 27 The blue cursor labeled 2 should be placed at the beginning of the first pulse reflection from the cable mV head The green cursor 1 is not used during the cali bration Now the Start Calibration button or F7 should i be pressed After selecting a suitable folder and number of files to be recorded usually one is sufficient the record starts Each triggered curve is saved in a sepa rate dso file and the position of the blue cursor 2 within this graph is transferred to the LOC graph right 128 and summed up in the red bars Finally the calibration E Eu um bs files can be saved together with further information about the specimen Report in a cfl file After the ac quisition has finished the cable length is automatically calculat
5. of the peak disturbance level This threshold is displayed in the upper right corner of the display MAN G once this mode is ac tive To change the trigger level press TH and TH This option is used to remove a known disturbance source in a stable environment AUTO The automatic mode calculates a gating time as a fixed portion of the measured time E g set ting the gating time to 10 results in a total blind out time of 2ms for 20ms 50Hz The trig ger level will be set accordingly to this time The total gating time when activated is displayed in the upper right corner of the menu AUTO G Pushing GT and GT allows changing the gating from 1 to 50 This option is used to when the noise situation is likely to change over time Bandwidth Mode Frequency Range The built in MODE 40kHz to 800kHz lp amplification and can be set to three different frequency MODE2 2MHz to 20MHz i E MODE3 200MHz to 600MHz ranges which are selected in the submenu BANDW The active bandwidth mode is marked by gt The following table lists the frequency bands for the three modes preamplifier RPAG has a logarithmic Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 59 An ICMcompact equipped with the gating function offers the following additional menus They can be ac cessed only in the SCO
6. 196 x 1 amplitude x phase x count depth Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 14 At the bottom of the display the synchronization frequency left the scaling of the y axis in Coulomb per division right and the current maximum value of discharge large letters is shown This maximum is cal culated from voltage periods during the last refresh cycle For best results the gain should be set so that this maximum appears in the range of 50 90 of the y axis total range In case the PD values are out of this range no valid Q can be shown This happens if the gain is either too high or too low In the first case gt max value and in the second case lt min value is displayed The setting of the gain can be adapted manually or automatically by turning on or off the AUTO mode This option is accessible at the MODE S or MODE M menu SETUR MAIN 35 Fig 11 MAIN menu charge level out of range The evaluation of the PD pattern measured in HOLD mode enables to determine the kind of fault within the test object Most PD faults like e g isolation damages voids surface discharges or floating points will have completely different PD pattern Typical criteria s to classify these pattern are e phase position of the maximum e phase position of the starting electron e the gradient of discharges e
7. 2 Pulse Velocity Units DSO Graph LOC Graph Export File Language The units in which length and speed are shown can be altered between the SI System MKS meter kilo second and the fps System feet pounds second If the Sliding Average is on multiple acquisitions of the DSO graph are averaged before they are displayed For this it is necessary to trigger al ways to the same fault signal The Trigger Mode allows to select Auto Normal and Single Shot This Fig 41 Options DSO Graph mode affects the repetition of the acquired graphs The cursor within the DSO graph can be hidden off or shown on so can the cursor within the LOC graph gg Most of the settings refer to the LOC graph leon Mode The analysis of the LOC graphs Calculation Mode can be done auto matically or manually However if the graph is more complex it is recom mended to do a manual analysis to avoid misinterpretations By the physical properties of TDR the cable measurement always starts from the far end i e the opposite end with no sensor Therefore the default display also measures and shows the results from the Far End However ol the Mapping Reference can be changed to start with the Near end n 1 M i ud e D This will be indicated by a capacitor symbol as sensor at the zero position E of the cable Fig 43 Coupling capacitor symbol The Peak Distribution shows each measurement res
8. 2 3 table 1 SYNC IN The SYNC IN can optionally be used for external synchronization of the ICMcompact to the fre quency of the applied high voltage This can be the output of a voltage divider such as the voltage divider included with some Power Diagnostix quadrupoles or of some other customized circuit If the SYNC IN is not connected the ICMcompact will synchronize on the mains supply frequency usually 90 or 60 Hz REMOTE The REMOTE terminal provides the optional serial connection to a personal computer for re mote communications using the serial cable provided by Power Diagnostix Mains supply The mains power supply plug must be connected to a power outlet providing power in the voltage range 85Vac up to 264V c frequency 47 440Hz The on off switch for the unit is located above the mains plug A power supply fuse is located between the on off switch and the mains power inlet GND The wing nut on the rear panel of the ICMcompact must be connected to ground GATE IN optional The GATE IN terminal which is not included in all models of the ICMcompact can be used for noise rejection during measurements To do so connect the output of an additional RPA carrying the unwanted noise signal to the GATE IN The minimum connections that must be made in order to use the ICMcompact are the mains power supply the AMP IN and the system ground Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fa
9. 3 3 DSO Display Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 19 NORM Setting this option gt enables the normalized visualization for the phase resolved PD display SCOPE The differences between NORM SINE and HOLD are described in chapter IIl 1 1 SINE Setting this option gt enables the sine visualization for the phase resolved PD display SCOPE HOLD Setting this option gt enables the hold visualization for the phase resolved PD display SCOPE MORE Pushing this button changes to the menu MODE2S EXIT Pushing this button changes to the MAIN S menu AUTO Setting this mode gt means that the gain will be adjusted automatically to the maximum level of the current PD pulses pC Setting this mode gt changes from the acoustic measurement mode mV back to the charge measurement mode mV Setting this option gt changes the display unit to mV for the acoustic measurement For a correct calculation of the input voltage it is mandatory to connect the RPA1D preampli fier or to disconnect the RPA supply in the menu MISC1 Within this mode the CAL and CALF menus are blocked and the FILTER setting are fixed to the frequency range 40 to 800kHz All these settings are stored before and will be recalled when changing back to the pC display mode MORE Pushing this button
10. Depth 300mm exclusive BNC Connectors approx 3kg Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 69 X 1 lICMcompact with HVM integrated voltage measurement The HVM option is mandatory for the VLF option Input Maximum level of voltage input Input Impedance Synchronisation optional A D Converter Samples Divider Ratio Precision Values displayed Adapted Display New menus Additional software features SYNC IN 200V pea into 1MQ 200pF 10 MQ 200pF with VLF option switched on 1MQ 200pF 10Hz 210Hz gt Vers 2 48 10Hz 510Hz on special order not with VLF 11bit 197 samples per cycle e g 20ms at 50Hz gt 100us window per sample adjustable via DIV DIV push buttons lt 1 5 typical Uprus value N2 value crest factor The voltage curve is adjusted automatically to the range of 90 pixels of the display the curve is plotted 1 1 if the level of the input voltage is below 2 5V at METER Display HVM 2 buttons Switch to voltage display HVM High Voltage Meter at HVM Display MODE 3 buttons sub menu to set the shown voltage val ues at the scope display at SETUP sub menu Display HVM can be turned off Data Record function manages the recording and storage of values like date and time PD level S Unus value U V2 value
11. HIGHP for setting up the lower cut off fre quency LOWP Pushing this button changes to the menu LOWP for setting up the upper cut off fre quency EXIT Pushing this button changes to the setup menu SETUP2 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 23 gt A0kH gt 40KHZ T Pushing this button sets the lower cut off frequency to 40kHz 80kHz 100kHz eu Pushing this button sets the lower cut off frequency to 80kHz EXIT 100KHZ Pushing this button sets the lower cut off frequency to 100kHz EXIT Pushing this button changes to the setup menu FILTER gt 800KHZ gt 800kHz Pushing this button sets the upper cut off frequency to 800kHz 600kHz 250kHz das E Pushing this button sets the upper cut off frequency to 600kHz EXIT 250KHZ Pushing this button sets the upper cut off frequency to 250kHz LOWP EXIT Pushing this button changes to the setup menu FILTER LLD LLD Pushing these buttons increments or decrements the level of the Low Level Discrimina tor This value is displayed at the upper right side of the screen in percent All discharges below that level are deleted and not displayed on the screen PH lt lt PH gt gt Pushing these buttons increments or decrements the position of the PD in relation to the zero point of the voltage synchronization line This value is displayed at the upper left
12. Result from DSO graph field below see figure left 78 Usually multiple PD pulses are recorded and evaluated This ensures to capture further PD sources and to state more precisely the position of single defects The graph on the right hand site collects the results from the distance evaluation of the DSO graph This localization graph LOC graph is usually created offline by a manual or automatic mode lt requires for the calculation either the total cable length or tne pulse velocity The number and charge of Bos 155 9 m l E 156 2 m l all captured PD pulses is then displayed as a function of the cable length Finally the fault positions can be measured by two cursors Fig 9 Final Fault Position from LOC graph blue and green directly Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 62 VII opecialized Software HVpilot optional The HVpilot software is designed to control the voltage for a test set up and to take measurements of voltage high voltage site partial discharge PD tan dissipation factor Cx ideal capacitance of the test object For this task three further instruments beside a PC are necessary e the STEPcompact to control the variac of a high voltage transformer observing the voltage for a possible break down and supply the HVpilot with the actual voltage value e the lCMcompact to take PD meas
13. changes to the menu MODE1S EXIT Pushing this button changes to the MAIN S menu Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact 20 gt FAST NORM IEC270 AUTO EXIT Partial Discharge Detector FAST oetting this option enables the fast movement speed of the pointer in the METER display NORM oetting this option enables the normal movement speed of the pointer in the METER dis play IEC270 oetting this option enables IEC60270 mode for updating the pointer in the METER dis play AUTO Setting this mode gt means that the gain will be adjusted automatically to the maximum level of the current PD pulses EXIT Pushing this button changes to the MAIN M menu Depending on the optional Functions two mode menus and their submenus are added For more information see 111 3 1 HVM Display 111 3 2 DSO Display Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact FILTER LLD RECOUT 2 SYNC KEYB MORE EXIT Partial Discharge Detector 21 CAL Pushing this button changes to the calibration menu CAL CALF Pushing this button changes to the menu CALF Here the calibration factor can be set di rectly GATE Pushing this button changes to the menu GATE The gating function reduces noise com ing from e g antennas and preprocesses
14. clip of the calibrator on the high voltage side of the test object and the negative clip of the calibrator on the low voltage side of the test object This will ensure that the calibration pulse will take the same signal path as the actual PD pulse Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 55 11 4 3 Calibration menu The ICMcompact offers a calibration menu CAL which can be found as first item in the menu SETUP1 To have the complete information for doing the calibration it is best to be in the SCOPE display However the menu CAL is not available when the optional displays HVM or DSP are visible Fig 67 shows the calibration menu in the SCOPE mode Once the calibration pulse is displayed on the screen GAIN and GAIN should be used to place the calibration signal reading between 50 and 90 of full scale i e 4 divisions since maximum is at 5 divisions The CAL and CAL buttons then adjusts the calibration value shown in the upper part of the display This value has to be set equal to the one on calibration impulse generator The calibration factor CF is calculated accordingly There is no possibility to make it undo GAIN EX Fig 67 Scope Display during Calibration Calibration factor and all other parameters remain stored when the system is switched off and are automatically recalled when t
15. crest factor 28 CURS entire ihe AT GUESOTF AAA 49 61 cutoff frequency 23 D Declaration 66 display 12 25 DIV EE TOP 29 divider factor 31 divider ratio 29 DSO umi 32 48 61 DSO Software 33 E ESYNG uino 26 EA NERIS 12 F FAO serenos 67 FAST suctus 20 25 FEET 3 ees 26 FILTER Sess 21 23 no TN 8 frequency bands 59 frequency range 59 USC oi 67 G G gating 12 gain 22 25 36 GAIN 18 48 GATE alas 21 GATE Nin 11 gating 57 58 gating time 59 Nestor TERR 48 GND nio etd 9 11 H HF disturbances 58 HIGHP 22 HOLD ns 13 19 Hold DSO 38 HVM 28 30 HVepilot 62 ICMcompro 61 ICMsystem 13 IE CZ 70 ences 15 20 Impulse Generator 53 INFO 24 25 K key menus 16 L LENGTH iones 49 LIGHT 24 25 ED 23 56 o 61 logarithmic 52 low level discriminator 23 56 EOWP isses 22 manual gating Noise Reduction 56 RPA 9 11 12 24 25 RPA siis 12 67 Partial Discharge Detector 71 SCAN 39 SCOPE iier erbe 13 serial link 9 60 SElUP inicia 51 Shipment 65 SINE 3 nie 13 19 SLOW 25 Software 60 Software Driver 8 SOUND icis
16. graphs Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 34 All functions of the software are accessible by the pull down menu in the top line This menu will change with the selection of Main or DSO panel The left x y graph displays the DSO graph The right x y graph LOC displays the re Here the single PD pulses are shown which sults of evaluated measurement curves Af are transmitted from the instrument The time ter the acquisition of multiple PD events the axis X axis can be zoomed from 2us to 80us user has to process each pulse by position With a fixed A D conversion time of 10ns this ing the three cursors R 1 and 2 within the relates to 200 to 8000 values Each value has left graph Marks for cable specific elements an amplitude resolution of 8 Bit A range mark like sleeves or terminations are also shown can be found underneath the DSO graph in this LOC graph at the lower frame The LOC graph can be switched off in the Win dow menu The center of the screen shows one line with different control windows for the instrument and software settings These values can be set by the user directly The fields above the function buttons display actual processed values like the cursor position or the charge and voltage value The charge value is calculated by the single displayed PD pulse whereas the voltage value
17. labeled AMP IN on the rear panel of the ICM compact The pre amplifier must be enabled if a RPA is connected Ensure the gt RPA ON is marked see chap ter 111 2 3 Try substituting other BNC cables to be sure that the problem is not in the cables themselves The calibration pulse is not visible on the LCD panel First check that the calibrator is still on The calibrator will shut off automatically after several minutes with out having its buttons pushed Check that the low battery indicator is not showing on the LCD panel of the calibrator The calibration pulse setting might be too weak for the test setup Try increasing the magnitude of the cali bration impulse applied to the test setup The calibration pulse onscreen might be present but too small to be easily visible Try putting the ICMcom pact into Scope Display Norm mode This will make the calibration pulse appear as a vertical bar which makes it easier to see onscreen that it appears in the Hold mode Sometimes the calibration pulse is lost if the high voltage power supply is connected to the test setup when the calibration is performed even if the high voltage supply is completely powered off Try physically dis connecting the high voltage supply from the test setup during calibration The calibrator will then be con nected across only the test object quadrupole and the coupling capacitor if present If the problems persists please contact Power Di
18. lowest repetition rate for these value currently 2s Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact 70 Partial Discharge Detector X 2 I CMcompact with DSO digital signal processor Fault location on cables wide band measurement time resolved Input Trigger A D Converter Samples Displayed Time Window Serial Link Specimen Cable Length Localization Precision AMP IN 0 to 100 of input signal step width in 3 12596 t fbit 100MSamples s T sample 10ns 2 80us 200 8000 Samples o6kBit s 10 to 5000m for 80us amp v 140m us 1m 0 1 of the cable length Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Xl INDEX 0 D TEIZ anite 26 A acoustic 19 AMP IN 11 analog gating 58 and cable fault loc 61 AUTO 15 19 58 automatic gating 59 AUX Ge 51 B BANDW 59 Deep ann 25 brightness 6 C cable fault loc 32 cable len 37 cable length 49 Qu 3 55 54 22 55 CALF ache 22 55 Calibration 53 calibration factor 55 calibrator 54 E in E 22 clearing time 59 Conformity 66 control buttons 6 coupling unit 8 9
19. set range Within the HOLD mode a light gray bar indicates the displayed range of the measured data It is also possible to adjust the Position and Zoom Range by the mouse cursor The mouse arrow will change to a hand for shifting the position or to a double headed arrow for changing the range zoom The colored lines underneath the bar gray green and blue indicate the cursor positions within the DSO graph The red T stands for the trigger position and is fixed S a Position Rang Position Zoom Fig 25 Marking of the range within the RUN mode and in the HOLD mode The visible part within the HOLD mode zoom can only be part of the acquired data i e zoom lt range Therefore the range during the measurement should be large enough to be able to zoom during the analysis Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 36 Gain Trigger Level The Gain value defines the total amplification of the high frequent signal The gain can be set between 1 and 80000 0 98dB in different steps The trigger level Trg Level can be set between 0 and 100 Both values are only accessible in the RUN mode Some possible reason for a lack of a repeating signal on the DSO graph are listed as followed gain level too low the trigger level is not reached trigger level too high with weak signals a lower trigger
20. side of the screen in degree EXIT Pushing this button changes to the setup menu SETUP2 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact 24 9 MIN gt 30 MIN 60 MIN EXIT Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com Partial Discharge Detector LIGHT Pushing this button changes to the menu LIGHT for setting up the timer for the screen saver INFO Pushing this button changes to the INFO display This display gives information about the current firmware version hardware release and the mailing address of Power Diagnostix gt RPA ON If this button is selected gt the power supply for the preamplifier is turned on Pushing this button until the checkmark is off turns off the supply to the preamplifier and enables to use the AMP IN terminal directly without preamplifier MORE Pushing this button will change to MISC2 EXIT Pushing this button changes to the setup menu SETUP2 5 MIN 30 MIN 60 MIN Pushing these buttons sets the automatic screen saver to 5 30 or 60 minutes That means when for about 5 30 or 60 minutes no button has been pressed the background lighting of the display will be turned off The light will be turned on by pressing any button EXIT Pushing this button changes to the setup menu MISC EXIT Pushing this button changes to
21. stable for the whole phase 360 it can be removed by the LLD function low level discriminator All PD pulses falling beneath the LLD threshold are deleted This will remove broad black band in the NORM SINUS mode of the SCOPE dis play LLD S9 078 i MA A OOO OO The LLD can be set in the menu SETUP2 LLD P by the buttons LLD and LLD The standard setting is 10 The LLD function is Su not active in the METER display FH gt gt EXIT 50 0Hz 1 BOpCIDIV Op 6 56pC LLDSET Fig 0 PD pattern without noise level Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 57 1 5 2 Window Mask Software Some disturbances like thyristor firing are phase stable They can be removed by the software function WIN This function selects up to 3 windows which blank out pulses oc curring in these windows Pulses occurring within these windows will neither contribute to the displayed charge peak value of the SCOPE display nor will they affect the reading of the meter Fig 71 and Fig 72 show the same meas urement whereby in Fig 72 one window is set to blind the respective phase position The menu SETUP1 WIN offers to set O to 3 windows The number of windows can be changed by OFF 1 WIN 2 WIN 3 WIN and is displayed at the bottom line The width of each window is identic and ca
22. taken from the far end Consider that the distance is now taken between the 1 and 2 cursors and not between the 2 and 3 like at the calibration Pulse Source Distance Fault Location Near End Coupling Unit Far End Open Fig 50 PD location on a cable 2x Distance Fault Location Fig 51 Time Diagram of a PD locatio Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 46 111 3 3 4 Functions for the DSO To get a proper PD pulse the gain and trigger values have to be set correctly These factors are independ ent from the calibration factor described in chapter IIl 4 3 Figure 52 shows an example of a triggered PD pulse with all its echoes taken from a HV test cable Setting the trigger level and the amplification can be done in the submenu TRG M which is found under the main menu MAIN D The Gain has to be increase until a trigger event occurs Push ing one of the two gain buttons GAIN GAIN will display the absolute gain value at the up per right border of the screen for a short mo ment Provided a preamplifier is connected The Gain can be set from 2 to 80000 in 17 steps With a very high amplification the trigger level reaches the range of the input noise The trigger level should be set between 50 and 90 ER percent of the y axis range Pushing the trigger PO DA SELLMET EVG buttons T
23. the analog disturbance signal To use this op tion the device need to be equipped with an external gating input and the hardware of the device has to be greater than Ver 2 60 A special logarithmic preamplifier RPA6 is also needed to amplify the distrubance signal MORE Pushing this button changes to the setup menu SETUP2 EXIT Pushing this button changes to the main menu MAIN S MAIN M or MAIN D FILTER Pushing this button changes to the filter setting menu FILTER LLD Pushing this button changes to the menu LLD to adjust the low level discriminator MISC Pushing this button changes to the menu MISC for miscellaneous settings MORE Pushing this button changes to the setup menu SETUP3 EXIT Pushing this button changes to the main menu one level up RECOUT Pushing this button changes to the menu RECOUT Here the ratio of charge value to output voltage can be set SYNC If this button is selected gt the frequency measurement and synchronization signal is taken from the SYNC IN input if possible To manually turn to the line mains sync de select the button With the optional VLF this button is labeled SYNC and changes to the menu SYNC See also chapter 111 3 2 VLF KEYB Pushing this button changes to the menu KEYB In here crucial menus which will directly affect the PD measurement settings can be locked and unlocked To unlock the key board a sequence of the numbers 3 4 3 2 must be entered MORE P
24. the setup menu MISC The INFO menu contains information about e the actual firmware version and release day SW Version SW Release e the hardware version HW Version e some optional instrument functions e contact details of Power Diagnostix ICMcompact LOW HIGH SOUND EXIT SCOPE DSO EXIT Partial Discharge Detector 25 BEEP The sound when pressing one of the five keys can be modified here DISPL Display modes SCOPE METER DSO and HVM can be deselected in this menu GAIN The speed of the AUTO gain MODE menu adjustment can be selected here MORE Pushing this button will change to MISC1 EXIT Pushing this button changes to the setup menu SETUP2 LOW HIGH Pushing these buttons switches between a higher or lower sound for the buttons SOUND Pushing this button enables or disables the audible indicator for the partial discharge signals EXIT Pushing this button changes to the setup menu MISC The display modes which are installed in the instrument can be deselected if they are not currently visible Modes which are deselected in this menu can not be selected in the MAIN menu and will be skipped This will increase the handling especially when the modes are changed frequently EXIT Pushing this button changes to the setup menu MISC2 The AUTO gain is turned on and off in the menu MODE S or MODE M The sensitivity or speed of the auto gain can be changed between slow and fast Th
25. to jump into the specific function Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 43 111 3 3 3 Calibration for the TDR Before raising the voltage on a cable for the actual PD location a TDR snapshot is done for calibrating the PD magnitude This can also provide information on the length of the cable locations of joints condition of the neutral wire and the level of sensitivity you can expect to obtain with PD measurements For the calibra tion followed calibrators are recommended to use XLPE Polymeric Cable CAL1B 0 1to 10 nC or CAL1D 10 to 1000pC Mass Impregnated Cable CAL1B 0 1to 10 nC or CALTE 1 to 50pC Laboratory Measurements CAL1A 1 to 100 pC A list of all available calibrators can be found in chapter III 4 1 Caution For calibration the system has to be de energized With the cable de energized the calibrator has to be connected to the conductor and neutral by two short leads at the near end of the cable see figure 46 After increasing the gain of the ICMcompact the magni tude of the calibration pulse should be increased until the pulse reflections are visible Either the pulse veloc ity Vc of the cable or the cable length can be determined by the instrument or the software l cable length 9 9 Near End Coupling Unit Far End Open SO 98 Fig 46 Co
26. way from menu to menu if pushing the appropriate button At the bottom of each menu its name is writ ten level wise colored background it Fig 15 Optional Menus Gate Fig 15 shows the optional gating menus These menus become visible if the device has an external GATE IN input channel In this case an additional logarithmic preamplifier RPAG is built in The noise sig nal can directly be connected to the GATE IN channel RUN TRG L EXIT URS SPEED POS lt lt gt mV Pos gt gt LENGTH XIT EN m IT miu O 419 o0 x u J S gt x mz Aa Fig 16 Optional Menus DSO extension Devices with a DSO acquisition board for cable fault location get the entry UNIT within the SETUP4 This option allows to select the display unit for cable fault positions There will also be an additional menu MAIN D for working with the DSO board This is shown in figure 16 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact 18 Partial Discharge Detector 111 2 3 Key Menus Description The following list explains step by step all menus coming with standard ICMcompacts with firmware releases higher than Ver 2 40 MAIN D MAIN H GAIN GAIN oets the amplification of the ICMcompact signal path up or down The total amplification is a combination of pre amplification external preamplifier i e RPA1 and main ampli
27. with the software running on a standard PC With this ICMcompact software it is possible to label and scale the AUX inputs Figure 60 shows the setup frame for a 2 channel system Within the main frame of the software the processed AUX values are displayed together with the PD pattern and the voltage values if the HVM is installed Long term records of the PD volt age and AUX data are easily done and can be exported to standard data file format However to access the AUX signal data the ICMcompact software is mandatory 1 3 6 STP Additional Setups optional If the ICMcompact is frequently used at different places the optional function STP can store up to 12 differ ent setups Three extra buttons are added to the front panel to swap between the different setups The top buttons A SETUP V will change the setup number whereas the lower button will lock this function The current setup number is shown in the lower right corner Power thi agna ote Fig 61 ICMcompact with twelve selectable setups Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact 52 111 3 7 LOG Logarithmic amplifier optional Partial Discharge Detector When capturing PD signals offering a larger dynamic range e g in a GIS gas insulated switchgear the ICMcompact can be ordered with a logarithmic scaling For this a logarithmic preamplifier the RPAGC is RANGE
28. 25 SPEED i 2 34 44 49 BLAM Sans 39 start LOC 40 SIP ass 51 SYNC IN 10 11 synchronization 6 10 T B deni 32 Technical Data 68 threshold level 59 thyristor firing 57 58 WRG xe 48 trigger level 36 48 Troubleshooting 67 TTL Gating of U UN nn 29 Upeak 28 Users 29 V velocity 37 VLF 21 26 30 VLF calibration 31 voltage output 26 W WIN 27 57 window 27 Window 57 Z ZM POS 49 ZOOM 35 ZOOM 47 49 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com
29. 9 241 79521 www pdix com ICMcompact Partial Discharge Detector 32 11 3 3 DSO Digital Storage Oscilloscope optional for TDR measurements Instruments with an optional DSO acquisition board for cable fault location TDR are able to process and display PD signals on a time based curve Single PD pattern can be triggered and recorded with a resolution of 10ns 100MSamples s and a maximum total display range of 80us with Firmware x 2 16 60us This results in a maximum cable length of about 5km max measuring time 80us and pulse velocity of Vc 140m us Since the LCD resolution is limited to 200 pixel the data display is compressed Using the PC Software extended by c e g ICMcompact 4 55c will enable to take full advantage of the high resolution This software is specialized to locate faults in long cables using the TDR time domain reflectometry at the cable terminations The cable length is limited to about 5km using max 80us measuring time and v 140m us it should be at least 10m Please also regard the software description in chapter IV 2 111 3 3 1 Measurement principle of TDR with the DSO The TDR time domain reflectometry uses the travel time of pulses Long high voltage cable behave as a wave conductor Therefore a pulse which is generated e g by a discharge travels to both cable ends If these do not have the characteristic impedance of the cable open ends the pulse will be reflected back to the opposite end The dista
30. C graph Report F3 Ctrl R This report is saved together with each CFL file created by the Save F5 function It allows the user to add comments and further information to the measurement data The report will be printed and exported to text cate so Nominal vage en files Set Date amp Time places the current PC time into the related en 9 suom tries Load Report allows to change the dso graph which is saved u together with the report data Edit Accs Edit Accessories opens a in E further sub window where the List of Accessories can be changed m They are also saved with the CFL file With the Browse Data Dir the Comment destination of the CFL file can be changed Export will save the report data as a standard ASCII file txt Set Date Load Bl amp Time Report ACCS Data Dir Fig 36 Report entry window Load F4 Ctrl L In the offline mode saved files can be loaded and displayed Both types can be loaded the pure scanned graphs dso and the project files cfl The project files contain the last displayed DSO graph together with the setup information of the instrument the report entries as well as the fault location within the LOC graph Save F5 Ctrl S Saves the currently displayed data in an cfl file Search Offline F6 Ctrl E This function connects or disconnects the link to an ICMcompact instrument During the connection all se lected ports are
31. ICMcompact Partial Discharge Detector ICMcompact Partial Discharge Detector User Manual Vers 2 07 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 2 Contents NECI RENS 4 1 1 ADOULINIS M anlalsa senken einen eisen 4 1 2 WAS ISSUE ENTE m DR 4 1 3 PENCIPIS OF Operation zes 5 DEM A Ep 6 11 1 TAS ACQUISKION Uan eed ata 6 11 1 1 Optional Functions for the ICMcompact 22200240002n00 nenn ennnnnnnnenennenennonennnnnnennnnenennenenennen 8 11 1 2 o o A 9 HN cir 12 111 1 Mam FUNCIONS nn aaa 12 111 1 1 OD a ee er el n 13 111 1 2 LEES P E O O E EEE ite TE AIA AAE T TT 15 111 2 NO MENUS artos 16 111 2 1 A EM Mu E M uu D DM n 16 111 2 2 Optional Key Mens ee ee einer 17 111 2 3 KEV Menus DD SSCIOUON bucal M 18 111 3 OPULENCIA tee ee ee ei ten 28 11 3 1 HVM High Voltage Meter Display optional occooocccoccococnccccnccncncnanononcnonononncnconcncnnos 28 111 3 2 VLF VEV LOWETOQUENO avda laica 30 111 3 3 DSO Digital Storage Oscilloscope optional ooccooccccocnccccnconcncconoconnnonononanononnnnnnnonnnnos 32 111 3 4 MUX Channel Multiplexer optional occcooococoocccococococononcnonnccnnononannconanononannonannnonanos 50 111 3 5 AUX Auxillary NPU ON em t 51 1 3 6 STP Additional Setups OPINAN uus o conti d tege ee u
32. PE display SETUP GATE menu MAN Pushing this button changes to the submenu for manual gating see below AUTO Pushing this button changes to the submenu for automatic gating see below BANDW Pushing this button changes to the sub menu where the frequency bands of the pre amplifier RPA6 can be set see last menu bar on this page EXIT Pushing this button changes one level up to the menu SETUP1 TH TH Pushing these buttons increments or decrements the gating threshold level This value is displayed at the upper right side of the screen in percent If the gating analog signal exceeds this level then the measurement PD signal is blocked for 100us at 50Hz The gating time per noise event T depends on the synchronization 4 frequency and is calculated by Le TT where fsync is the sync frequency displayed in the left bottom sync corner of the display ON gt ON This button turns the gating function on gt ON or off ON The gating function remains off if no preamplifier is connected to the gating input Usually the preamplifier is build Pushing this button changes one level up to the menu GATE GT GT Pushing these buttons increments or decrements the total gating time This value is displayed at the upper right side of the screen in percent The instrument automatically adjusts the threshold level If the gating signal exceeds this automatically set level then the PD signal AMP IN is blocked for m
33. Partial Discharge Detector 9 1I 1 2 Connections There are various circuits to take measurements of PD with the ICMcompact The diagram below Fig 6 illustrates the basic connections among the elements of the partial discharge measuring setup with the ICMcompact Here the coupling device CILAL is put in series with the coupling capacitor So the test ob ject can be connected in parallel to the coupling capacitor and the voltage supply HV supply Caution The AMP IN is only to be connected with the pream plifier or a Spectrum Analyzer The supply voltage for the pre amplifier may damage the output circuit of the signal source Be sure not to connect anything but a RPA to this terminal or to turn OFF the supply voltage Only the SYNC IN terminal can take voltages up to 200Vpeak Do not apply any voltage to Has the REC OUT terminal min 100 2 input impedance short distance PD Power Diagnostix O System max 50m RG58 PD Power Diagnostix Bruesseler Ring 95a D 52074 Aachen 49 241 74927 di REMOTE SYNC IN REC OUT Q Mains Supply System Ground Serial PC Port Ext Sync To Recorder optional Fig 6 Basic connections for PD measurement on a test set up Not drawn to scale In order to prepare a measurement connect the input CC of the coupling unit CIL4L to the low side terminal of the coupling capacitor and the ground input GND of the coupling unit to ground The output of the cou
34. RG TRG will display the trigger level as a horizontal line for about 3 seconds The trigger makes no difference between positive or negative pulses it is an absolute value For better evaluation it is necessary to see the area in front of the trigger pulse This pretrigger is fixed to 1us 100 samples For the cable fault location it is mandatory to use a preamplifier with a high bandwidth Power Diagnostix offers for this application the pream plifier RPA1L or RPA1H 40kHz 20MHz The higher bandwidth is necessary to measure the pulses and its reflections running over the HV cable without attenuation and distortion of the preamplifier The time distance of the pulses is the decisive criteria for the location Parameters EXIT like pulse velocity or cable length will be pao s i u needed to calculate precisely the fault position Fig 53 Indicator for the Displayed Area within the cable These settings can be changed with the menus SPEED or LENGTH The user can select between the units meter or feet within the menu UNIT This submenu can be entered via the setup menu SETUP3 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 47 After setting the correct trigger and gain the PD pulse becomes visible The triggered pulse and two reflections should be displayed before going on with further evaluations Adjust the zo
35. a 51 Il 3 7 LOG Logarithmic amplifier optional oooccccccncocnncocnnnccncnocncnncnnnonononnnnncnonnnnnnnnonnnnnnnnos 02 111 4 2 he 6 2 Deere era eee EIC LIU cix d D DEL LM I E E I o3 111 4 1 Calibration Impulse Generator oocccoccccoccoccnncconncccncconnonanonnanconnnonnnnnnnnnnnnnnonnnnnnnnonnnonannonanenos 53 111 4 2 CAlDFALlON TE SU o de 54 111 4 3 Calibration MEU in 55 111 5 NOISE REQUOLON une ee ee ee ee 56 111 5 1 LLD noise ground Low Level DisScriMiNator coooncccooncccoccnnconcncnoncnonnnnnonnnnnnoncnonnncnnonannnonons 56 111 5 2 Window Mask SOMWarS land ci 57 111 5 3 External Signal Gating TTL Gating optional oocccoonccccnccccnccncnconcncnannnnnnnnnnnnoncnoncnnnnos of 111 5 4 Gating With External Sensor Optional Analog Gating coccccocnccccnconcncnonononncononcnanonannnnns 58 IV ThelCMcompact Software OVervieW ooccooncconncoccccccccoocnconcnconnnnonnnnonnnnnnnrennnrrnnnrrnnnrrnnnrnnnrrnnnrennnrenanennn 60 V Standard Softwares ICNICOMP ACE siia ete peser ie 60 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 WWW pdix com ICMcompact Partial Discharge Detector 3 VI Extended Software ICMcompact with cable fault location oocccooccconcconcnccncncnnnnnonnnnnnnnnnnnos 61 VII Specialized Software HVpilot optional cooccoconcoccnncccnccnonoconnncannonanonnonnonanonnnnonannnnann
36. age of results can be done by means of the optional serial interface and a PC program A precise evaluation of the measurements is possible using databases specific knowledge bases or getting in contact with Power Diagnostix people For tasks requiring extended computer control protocol functions and data manipulation we recommend the ICMsystem Test Object Bushing Cable PD Signal Switchgear Capacitor GIS Transformer Motor Coupling Unit c EPI el PD Instrument capacitor CILAL _ 66208 pens CC25C V ICMsvst CC100 ICH CT1 Preamplifier CT100 T RPA1 RPA2 RPA2B RPA3 NL RPA4 A RPA5 RPA6c log Database Knowledge Base PD Support Software evaluation experts Power Diagnostix Data files meetings Agents worldwide MS Excel papers reports Fig 1 Principle PD Measurement The ICMcompact is easy to use The operator can choose between several display modes of the integrated LCD screen e g meter display scope display or partial discharge pattern display All instrument settings including calibration are done via the on screen menus by pushing the five buttons on the right side of the instrument These settings are automatically stored in a non volatile memory when the system is shut down The following section describes the use of the ICMcompact PD detector Power Diagnostix Br sseler Ring 95a 52074 Aachen Ge
37. agnostix for technical support Other problems The troubleshooting section of the ICMcompact manual is evolving If you encounter problems with your ICMcompact that you think would be helpful to add to this troubleshooting section please submit them to Power Diagnostix Thank you for your assistance Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact 68 Partial Discharge Detector X Technical Data of the ICMcompact standard Mains Supply Line Fuse Power Requirements Display Display Resolution Operation Input Impedance PD Input Sensitivity Lower Cut Off 6dB Upper Cut Off 6dB Synchronization Synchronization Range optional External Synchronization Recorder Output Operation Temperature SIZe Weight 85 264V ac 47 440Hz automatic 16A time lag approx 20VA backlit LCD 128 x 240 Pixel S W 5 menu supported pushbuttons 10kQ 50pF RPA1 Input 500 AMP IN lt 200uV RPA1 Input lt 2mV AMP IN 40 80 or 100kHz software controlled 250 600 or 800kHz software controlled Line with automatic change to external 10Hz 210Hz with HVM and VLF option 10Hz 410Hz gt Vers 2 48 10Hz 510Hz on special order max 100Vims or 200V peak Into TMQ 200pF 0 10V with Ro 100Q re converted analog value of the meter reading 10 40 C non condensing Width 236mm Height 133mm
38. al mode only triggered signals are dis played With the Single shot mode just one trigger event is shown the first possible then the software turns to the HOLD mode Max Display This value limits the indicating range of the x axis within the LOC graph It is possible to choose a value greater than the cable length however a sensible range is limited by the Range and the pulse velocity The maximum acquired length can be calculated by Vc Range Max Display max 5 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 37 Calibration of the cable length Cable Len The values for the cable length and the pulse velocity can be entered in the fields directly if known If only one value is known the second value can be determined with a calibration measurement Power Diagnostix Cable Fault Loco O The selection of the calibrated value is done in the Eile Edit Connect Acquisition Win ow Options Help AAA E sjals E eel Sr menu DSO Panel Options Calibration Mode Length Pulse velocity gt Pulse Velocity 7 Multiple Averaging IV Freezelnst jnite gt If the pulse velocity of the cable type is known it can be entered in the related field The cable length can then be calibrated by injecting an impulse at preferably the near end of the cable For this an impulse generator CAL1A CAL1B or equivalent
39. ater change of the gain will need a new calibration The calibration should be done with a simulated PD pulse close to the expected PD in respect of location and magnitude see also chapter 111 4 The gain should then be set to about 50 of the maximum input level This signal input level is indicated by L 50 Then the injected PD pulse magnitude can be set with CAL and CAL After pressing one of the CAL buttons the calibration factor is calculated and stored in a non volatile mem ory WWW pdix com ICMcompact Partial Discharge Detector 53 111 4 Calibration PD measurements refer to the apparent charge and are relative measurements Therefore each new installation changes of relevant quantity e g bandwidth coupling capacitance etc requires a new calibration This is done by injecting a known PD pulse close to the origin of the real PD source test object and from this calculating the scale factor for the measurement The injected PD pulse should be in the range of 50 to 200 of the expected PD magnitude 111 4 1 Calibration Impulse Generator There is a broad range of impulse generators offered by Power Diagnostix for different purposes Table 2 gives an overview of these calibrators All calibrators allow the calibration of PD measurements according to IEC60270 2000 except the CAL2B Since the CAL2B has left out the injection capacitor to enable calibration on GIS Calibration Range Output Frequency Imp
40. ax 49 241 79521 www pdix com ICMcompact CURS 1 POS gt gt LENGTH EXIT LEN LEN EXIT SPEED SPEED EXIT Partial Discharge Detector 49 ZOOM ZOOM With these buttons the zoom can be adjusted More details are described above POS gt gt POS lt lt With these buttons the displayed position can be adjusted More details are described above EXIT Pushing this button changes to the setup menu MODE D CURS 1 CURS 2 Pushing this button toggles between the two cursors The selected cursor is indicated by a black filled triangle at the upper end of the dotted cursor line POS lt lt POS gt gt Pushing this button will shift the selected cursor to the corresponding side If the cursors are out of the display push POS lt lt POS gt gt or increase the ZOOM LENGTH Pushing this button changes to the menu LENGTH for setting up the cable length LEN LEN Pushing this button changes the setting for the cable length The calculated value for the distance between the two cursors can be set accordingly This will change also alter the pulse velocity Please regard the calibration described above EXIT Pushing this button changes to the menu CURSOR SPEED SPEED Pushing this button changes the setting for the pulse velocity This value is used to cal culate the distance of the cursors EXIT Pushing this button changes to the setup menu MODE D m ft Pushing this button enables g
41. aximum 100us at 50Hz ON gt ON This button turns the gating function on gt ON or off ON The gating function remains off if no preamplifier is connected to the gating input Usually the preamplifier is build Pushing this button changes one level up to the menu GATE MODE1 Pushing this button selects the frequency range 1 40kHz to 800kHz for the preampli fier RPAG at the gating input MODE2 Pushing this button selects the frequency range 2 2MHz to 20MHz for the preampli fier RPAG at the gating input MODE3 Pushing this button selects the frequency range 3 200MHz to 600MHz for the pream plifier RPA6 at the gating input EXIT Pushing this button changes one level up to the menu GATE Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 60 IV The ICMcompact Software overview There are two software packages available to communicate with the ICMcompact via serial link RS232 e CMcompact Standard software to record and save PD measurement data Optional version for the cable fault location only to use with the DSO extension e HVpilot Used to take measurements over long periods Useful only with the STEPcompact Software has to be ordered separately and is delivered on a CD ROM Software updates can be downloaded from Power Diagnostix home page www pdix com using a valid login and password After d
42. ch hamper partial discharge detection and which can be handled by the gating function are for instance radar signals co rona discharge or thyristor firing Using the analog gating function blind out such impulse noise Continuous radio frequency signals from broadcasting for example cannot be removed by the gating function Here the active bridge adapter AB1 is used The analog gating function is an optional function and has to be ordered separately An ICMcompact with a gating function comes with a built in preamplifier RPAG and a GATE IN terminal BNC on the rear panel An antenna or another sensor that picks up the disturbance signal is connected to this GATE IN terminal With some appli cations a CT1 current transformer is used to acquire the disturbance signal from a ground conductor or from the screen of a signal cable The gating function is activated in the menu MAN G or AUTO G see chapter III 2 2 Op tional Key Menus gt ON indicates activated gating In case the disturbance signal at GATE IN terminal exceeds a threshold the processing of the analog signal is blocked Fig 75 PD pattern after manual gating for 10 to 100us Thus the signals falling in this period does not contribute to the instru ment s display and derived quantities Two different modes of setting the trigger can be selected from the menu GATE MAN The manual mode offers to set the trigger from 1 to 100
43. continuously on a time axis Beneath this the programmed test voltage curve is displayed to follow a running test or to compare the measured data later on Actual measurement values from the cursor position are displayed on the left hand site The ten function buttons in the bottom row give a quick access to the main program func tions Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 63 n Tesi inquim ca The first step to create a test sequence is the step a eic voltage curve This can be done offline without Pr the instruments and downloaded later to the m pu zo UMS STEPcompact for the voltage control Fig 81 12 if Ir shows the function panel to create the step volt i tnw age curve _ ao E sieur vo itu ges a i i A DL D J 4 trig mw pw ew Tells Fig 81 Panel to create the step voltage curve The next step is to define the kind of test which has to be done Three different kinds of test sequences are offered e The first is designed for tests which plainly acquire the PD activity and the tan 6 Cy at predefined volt age levels e he second allows to set maximum PD levels at certain voltage values for e g acceptance tests e The third is designed for breakdown tests E g several test specimen have to withstand an over voltage for a certain time The voltage is increased continuous
44. corner Now the user can place the gray cursor at the base of the trigger pulse AA around Ous The red cursor should be placed at the base of the 300 E first reflection of that pulse Select will take this cursor inter X pretation save the cursor positions and put one red bar into the is LOC graph of the main window If there is already a red bar at that position it will increase the length number of this bar Se VR OM LR AA al lect All wil take the saved cursor positions of all selected files and add the results to the LOC graph in the main window This should only be done if an interpretation of the graphs was al ready done and saved in the dso files Skip will ignore the displayed graph and move to the next selected one without ac is is us n im tion Back moves one selected graph back and deletes the last ax iom x imu Y LE result in the LOC graph e g to correct a misinterpretation De j lete File will remove the displayed file from the disc With Save File As the current file can be copied and renamed Cancel stops the whole replay function Fig 35 Replay window for data analysis Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 40 Each selected file is automatically counted in the LOC graph The position of the red cursor determines the marking of a defect within the LO
45. dapter or a short length of BNC cable in order to minimize the capacitive loading of the coupling unit and fully benefit from the relatively high input impedance 10k0 50pF of the RPA1 The quality of the connecting cable between the RPA1 output and the ICMcompact display unit AMP IN is fairly uncritical Normal RG58 BNC cable is recommended for lengths up to 50m RG213 cable which has a lower attenuation is recommended for lengths up to 200m Quadrupole The quadrupole captures the PD signal from the coupling capacitor or alternatively from the test object itself Power Diagnostix offers quadrupoles as separate modules or as built in compo nents of coupling capacitor units The output of the quadrupole must be connected to the input of a preamplifier The input marked CC must be connected to the low side of the coupling capacitor or alternatively to the low side or neutral of the test object The terminal marked GND must be con nected to the system ground If the quadrupole has an optional voltage divider the output marked U is a low voltage copy of the high voltage applied to the test object and coupling capacitor This output can be used for external synchronization when connected to the SYNC IN terminal of the ICMcompact REC OUT The REC OUT terminal of the ICMcompact may optionally be connected to a paper recorder or other device to provide a graph of the average charge magnitude For the output level see chapter 111
46. described in chapter III 3 3 3 Calibration for the TDR Divider Factor Adjustment The HVM option high voltage meter is mandatory to get the correct phase synchronization with the VLF mode Therefor the divider factor DIV should also be adjusted The divider factor can either be read off the coupling unit directly e g CC50 V with DIV 500 or calculated by Ca C C TU whereas C relates to the HV coupling capacitor and C to the low voltage capacitor C For Cy gt gt Cc applies DIV C4 Cc DIV Phase Shift Adjustment The ICMcompact will adjust the phase shift PH due to the lower frequency automatically This calculation requires the nominal divider factor and the low voltage capacitor C4 of the coupling unit These values can be set in the menu MAIN H while the synchronization frequency is set to one of the three VLF s e g SETUP3 SYNC gt 0 1 Hz Usually this values can be found on the coupling capacitor Using the com bined Filter Coupler unit TCC the following table shows the relevant values Coupler Ca Divider fac Type tor at 50Hz TCC25 250nF 250 TCC30 o00nF 900 TCC50 o00nF 900 cable specimen s Far End Open 00000 e ICM compact voltage supply Fig 20 Example test set up for a VLF measurement on a HV cable with a TCC filter coupler unit Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 4
47. dissipation factor and capacitance no change Measuring tap test 3 kv 50 Hz 1 min carried aut together with the measurement of capacitance see pos 3 lI lI lI m E oo RO C3 2 Test conditions Test date 11014 Bushing complete lower part in ail Ambient air temperature s 18 0 C 1 2 Measuring circuit acc IEC 270 Measuring instrument ICMcompact Background noise 2 pc 3 Individual results en i cri KENNEN a U kV A y Boll 0 AO 0109 ep po 440 0110 90 128 daj o 890 13 t p 830j 0110 85 e FP 4 Assessment The bushing corresponds to the test specification Edition A Issued by bh Manager testing section 5 Remark Bruesseler Ring 95a i l l i 53074 Aachen Tel 49 241 74977 P O i H Germany Fax 49 241 79521 OWCT d A OS IX Fig 83 Example Report Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 65 VIIL Miscellaneous VIII 1 Maintenance The ICMcompact does not require any maintenance on a regular basis There is no fine adjustment on a regular basis required as the partial discharge measurement is a relative measurement that is calibrated with a reference source prior to a measurement The calibration impulse generator as the reference source however must be calibrated on an annual basis to ensure that it
48. does the button Start Replay Main Panel F9 Ctrl P This button changes the instrument back to the PD mode the software will also change it s acquisition mode One brief interruption during this switch is usual Exit F10 Ctrl X The program is terminated by the EXIT button Menu Options Some additional functions are accessible via the menu block at the top of the program window In the fol lowing those functions of the menu block are described which are not accessible within the main user inter face Power Diagnostix Cable Fault Location With the buttons PgUp and PgDown the next respectively previous cw mum Vr c BE DSO file can be loaded from the current folder The program has to be in Load Next D50 File PgUp the offline mode A brief message will give a warning if no DSO file can be found in the selected folder Load Previous DSO File PgDown Save F5 Export Results Print F9 Default Directory Exit Fig 37 Pull down menu File reeze Instr Display The function Export Results will put the calculated fault positions shown in the LOC graph into an ASCII text file The Report data are also added F10 With the function Default Directory a folder can be selected which is automatically opened with the Load or Save function The menu Edit offers functions like Copy DSO Copy LOC and Copy Bie Edt Gwen Acquistion Window o UP DSO4LOC to put one o
49. e ICMcompact should be controlled by others than the original software a driver for C is available This driver is only useful for software programming on request e Fiber Optic Link FOL for the serial interface RS232 Offers a safe insulation and an extended distance between ICMcompact and the PC Laptop e Fiber Optic Link FOL to the preamplifier RPA4 Allows measurements on the high voltage side and safe insulation to the measurement unit e TTL Gating input Via a BNC connector at the rear panel a TTL signal allows to blind out disturbance signals see also chapter 111 5 3 e Analog Gating input Allows to capture disturbance signals via an extra preamplifier preferably the logarithmic RPA6 which is used to blind out the noise signal see also chapter 111 5 4 e Current output A signal of 4 20mA equivalent to the calculated charge is provided on the rear panel e Full 19 wide box to fit the ICMcompact into a standard rack e Software packages Two software packages to communicate via a PC are available see also chapter IV CMcompact Standard software to record PD measurements and create report documents Optional version for the cable fault location only to use with the DSO HVpilot Used for voltage control and taking measurements over long periods in combination with the STEPcompact Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact
50. e SLOW mode is use ful if a PD level is quite constant or if random spikes will disturb a continuous measure ment The FAST mode is useful if rapid changes of the PD level should be captured e g when measuring the inception voltage of a specimen A single PD level which will over range the preamplifier stops the acquisition and the gain is adjusted instantly EXIT Pushing this button changes to the setup menu MISC2 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 26 LOCK LOCK This button allows to lock the keyboard leaving only the functions available which will not affect the parameters of the instrument The locked functions are labeled in the Menu Structure chapter 111 2 1 by Entering the KEYB menu while being locked the buttons are labeled 1 2 3 4 EXIT To unlock the keyboard a sequence of the numbers 3 4 3 2 must be pressed EXIT Pushing this button changes to the setup menu SETUP3 ESYNC If this button is selected gt the frequency measurement and synchronization is taken from the SYNC IN input if possible To manually turn to the line mains sync deselect the button 0 1Hz 0 05Hz 0 02Hz For the acquisition with the VLF very low frequency option the external voltage signal from the SYNC IN is mandatory Selecting one of the three VLF frequencies will deselect the external frequency measurement
51. e increased UP or decreased DOWN by pushing the button lt lt gt gt To select the character which should be changed the cursor can be moved up lt lt or down gt gt in range by this buttons UP DOWN Sets the divider ratio of the high voltage divider The selected character can be in creased UP or decreased DOWN by pushing the button The ratio has to be in serted as a factor of 1 x e g with a divider factor of DIV 1000 a maximum measuring range of 100kV r is possible Since the maximum input Voltage is 100V or 200V peak lt lt gt gt To select the character which should be changed the cursor can be moved up lt lt or down gt gt in range by this buttons Urms Setting this option displays additionally the root mean square value of the voltage in the further selected displays see Fig 19 02 oetting this option displays the peak value divided by 1 414 in the further selected dis plays OFF Turns off the additional display of the voltage value in the selected displays see menu DISPL This will increase the refreshing cycles in the other displays since the voltage value is not calculated Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 30 1 3 2 VLF Very Low Frequency Instruments with the optional VLF acquisition are able to synchronize trigger at very low
52. ed by the entered velocity Vc and the tallest red bar Calibration of the pulse velocity Vc a E If the cable length is known the pulse velocity can be calibrated For this a cali Fig 27 Cursor positioning for length calibration bration as described above should be done With a double click of the left mouse button at the position of the red bar a new window will pop up By entering the E precise cable length into this window the pulse velocity will be calculated auto E matically Cable Length m 180 t Cancel Fig 28 Vc calibration Calibration of the charge value Qp Cal The button Qp Cal within the charge meter allows to calibrate the current DSO curve The entered PD value will be assigned to the area underneath the triggered pulse Thus this charge value represents the single displayed curve whereas the charge value shown in the Main panel represents the peak charge value since the last data refresh Calibration Charge Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 38 Description of the Functions The function keys at the bottom of the window offer the major functions needed for a cable fault location In the following these are described in detail as well as the different conditions of the program Active function keys are marked with dark gray The keys are labeled with the functio
53. est leads may act as antennas disturbance free measurements may require well shielded environments and or additional filter techniques Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 67 IX FAQ Troubleshooting This chapter lists some problems that may be encountered in using the ICMcompact along with possible causes and remedies The ICMcompact doesn t do anything when powered up The power fuse might be blown Unplug the unit and check the power supply fuse This fuse is located on the rear panel of the ICMcompact beneath the on off switch see figure 6 chapter 11 1 2 The personal computer cannot find the ICMcompact A communications error with the serial connection to the ICMcompact might have occurred Within the ICM compact PC software check to be sure that the serial com port selected in the menu Connect is the com port to which the ICMcompact is actually connected Try rebooting both the ICMcompact and the PC The RPA message appears in the lower left portion of the data display of the LCD panel even though the RPA preamplifier from Power Diagnostix is connected The RPA might be installed improperly backwards Check to be sure that the BNC connector marked gt leads from the sensor quadrupole CT or coupling capacitor and the BNC connector which is marked by the sign gt leads to the BNC connector
54. extra buttons can be locked and unlocked by the button LOCK This is indicated in the display by an L In the example in Fig 57 channel 1 is selected for the PD signal channel 4 for voltage measurement and synchronization And the right keyboard is locked Fig 58 Back panel of the ICMcompact with MUX4 and AUX input Two main multiplexer are available for the CMcompact 1 4x AMP and 4x SYNC 2 12x AMP and 12x SYNC with external remote controlled box RB2 24 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 51 11 3 5 AUX Auxiliary Inputs optional Up to 8 auxiliary input channels AUX can be ordered for the ICMcompact These inputs can be used to record extra signals like power temperature pressure etc Commonly used input levels of either 4 to 20mA Aula nr Ema jea Desciplico MA amp 4 20m amp ue Dm 2 Ghz Doscipiion stammt Fa 4 20 me jigs 00 2000 00 Cei bri Fig 60 Screenshot or O to 10Vpc are available The rear panel of the instrument has one BNC connector for each AUX channel as can be seen in figure 59 Caution The AUX inputs are only to be connected with their designed signal magnitude Overvoltage e g from the signal for the SYNC input might harm your instrument A serial interface RS232 is used to link the ICMcompact instrument
55. fication internal By selecting the automatic mode see MODE S the gain will be adjusted automatically to the current maximum discharge level The peaks of discharges should be visible at 60 to 90 percent of the total display range With very high gain set tings the noise becomes visible on the screen If there is no phase dependency of the signals no discharges set the noise level to 5 of the total range of the display This ensures that all newly appearing discharges will be recognized if their level is higher than the noise at the input MODE Pushing this button changes to the MODE S menu METER DSO or HVM Depending on the optional DSO acquisition board and the switched on displays see menu DISPL this function switches to the next display type SETUP Pushing this button changes to the setup menu As there are several setup menus this function enters ever the last setup you ve been before GAIN GAIN see explanation above MODE Pushing this button changes to the MODE M menu METER or DSO Depending on the optional DSO acquisition board and the switched on displays see menu DISPL this function switches to the next display type SETUP Pushing this button changes to the setup menu As there are several setup menus this function enters ever in the last setup you ve been once before Depending on the optional Functions two main menus and their submenus are added For more information see 111 3 1 HVM Display 111
56. frequencies like 0 1 Hz Since the synchronization is done by the supplied high voltage the instrument needs also to have the optional high voltage measurement HVM An ICMcompact with the VLF function has an additional submenu SYNC which is accessible in the SETUP3 menu see chapter 111 2 At an ICMcompact without the VLF function this key is labeled ESYNC ESYNC If this button is selected gt the frequency measurement and synchronization with fre quencies gt 10Hz is taken from the SYNC IN input if possible To manually turn to the line mains sync deselect the button 0 1Hz 0 05Hz 0 02Hz Selecting one of these buttons gt will activate the VLF measurement mode For the acquisition with this option an external voltage signal from the VLF system is recom mended Selecting one of the three VLF frequencies will deselect the external fre quency measurement The zero crossing of the voltage signal will be determined by the internal software automatically The frequency has to be chosen according to the settings at the VLF high voltage source 111 3 2 1 VLF Installation Connection For partial discharge measurement on a medium voltage cable the core of the specimen has to be con nected to a coupling capacitor Cc e g 1nF The low voltage side of Cc is then connected to a quadrupole e g CITAL suitable to stand the max current determined by Cc and Umax A broad band preamplifier should be connected with a short link c
57. ge Detector 15 111 1 2 Meter Fig 12 shows the instrument s display in the MAIN menu and METER mode The buttons GAIN and GAIN increase or decrease gain resp amplification factor Meter scaling automatically tracks the actual calibration and gain factor The button SCOPE DSO or HVM activates the next display mode and the button SETUP calls the configuration menus The line beneath the meter displays the synchronization signal frequency line voltage or the external signal at the SYNC IN terminal the scaling of the meter and the actual peak value of the apparent charge Qp MODE calls a submenu for controlling the pointer movement and speed see Fig 13 Within the menu MODE M three different speeds for the pointer can be selected The chosen option is marked with an arrow ahead In gt FAST the actual peak charge value of an acquisition cycle is displayed this may lead to unstable readings i e jerky movement of the pointer when the pulse repetition rate is slower than about 5s The actual peak value is also displayed in gt NORM mode but here the pointer is stabilized New pulse values are shown immediately yet the pointer falls back Fig 13 Meter Display Mode Menu slowly until a bigger pulse occurs The option gt IEC270 treats the pulses with a weighting curve as mentioned in the actual revision drafts of the IEC 60270 This weighting which displays rarely occurring pulses only with a fraction of their real am
58. he system is switched on again Be sure that the calibration is only changed in case of test setup modifications to keep the integrity of the monitoring results If the calibration factor is known from previous BILLION l i a H calibrations or from an identical test setup it is also possible to directly enter this value In the menu CALF the calibration factor can be entered directly For this change it is not necessary to adjust the gain since there is no processing of the measurement value The calibration factor CF is displayed in the top left corner and relates to a virtual gain of 1 50 O0Hz EXT Fig 68 Setting the calibration factor The software ICMcompact and HVpilot offers to save the whole instrument settings as cmp rep hvp and thus enables to repeat a test with same the settings and calibration For using a stored calibration it has to be ensured that the test circuit is the same For saving and loading the instrument settings see the respective software manual Caution For calibration the system has to be de energized Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 56 111 5 Noise Reduction 11 5 1 LLD noise ground Low Level Discriminator Depending on the environment and the test circuit different level of background noise are visible see Fig 69 Since this noise level is usually
59. hin on segment of the x axis are pictured by red vertical bars also called projections within the LOC graph But only points which exceed the set level are taken into account This level can be seen as red arrow next to the LOC graph The most frequent maxima also called peak distribution are indicated as faulty positions underneath the L OC graph next to Pos1 3 Via the menu Options LOC Graph different results can be shown or dis abled Two cursor can here be activated to measure distances The results of the cursor distances are shown underneath the LOC graph Also the sensitivity for the projections red bars can be adjusted Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 41 The LOC function is automatically started with the replay of saved measurements It must be pointed out that the counting within the LOC graph starts from the far end The display range for the axis Max Display should always be larger than the cable length otherwise faults can be overlooked Note The automatic analysis of the curves correlative peak distribution should not be the only cri terion for the fault location To verify the results the original DSO curves the installation plan and the impact of disturbances should be taken into account If the software is offline the Start LOC button will start the manual fault location as
60. is taken from the HVM menu Hence the charge meter must be calibrated within the DSO again The divider factor for the voltage meter is taken from the HVM menu The most frequently used functions are additionally placed at the bottom line They can also be accessed by the function button F1 to F12 left to right After launching the program and entering the DSO panel there are two applications possible a Online measurement for cable testing Pressing the Run DSO button or F1 will start a continuous online acquisition This mode displays the acquired curves quickest possible on the software according to the transmission rate and the set trigger mode b Offline use for data evaluation To evaluate recorded data the software should be disconnected with the instrument by pushing the button Offline This will disable the Run DSO button and change the Start Scan button to Start Re play Pressing this button opens a further window to select the stored measurement files One file dis plays one fault within the cable All relevant files should be added and are then opened in an extra win dow Here two cursors can be set manually to determine the different fault locations The results of this evaluation is shown in the LOC graph see above by red bars relating to the distance and number of faults Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Pa
61. itched on it s about 10MQ If you use a coupling unit from Power Diagnostix either quadrupole or capacitor with a built in quadrupole the once with the extension V like CC25C V or CIL4M V will have an extra output labeled U Connect this low voltage copy of the applied voltage to the SYNC IN connection on the rear of the ICMcompact Additionally a TTL type trigger signal can be supplied to the SYNC IN connection to force synchronization Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 11 The connections to the ICMcompact are made on the rear panel of the instrument to the four BNC con nectors one wing nut screw and one serial connector The functions of the connectors are as follows AMP IN The AMP IN BNC connector is where the PD signal enters the ICMcompact The AMP IN con nector must be connected to a remote preamplifier RPA Notice the direction of the arrows en graved on the RPA the arrows must point toward the ICMcompact RPA The output arrow gt engraved on the RPA preamplifier must be connected to the AMP IN of the ICMcompact The input arrow amp of the RPA must be connected to the output of a quadrupole measuring impedance or other PD signal sources such as a current transformer The connection between the output of the coupling impedance and the RPA1 preamplifier should be with a BNC BNC a
62. ke the grid the voltage curve and the PD pat tern and additionally text elements like the menu description the values shown at the lower border and set tings written at the upper border Some conditions are displayed as abbreviations at the lower left side The following table shows these abbreviations and its meaning Abbreviation Meaning RPA To es missing preamplifier or damaged cable between preamplifier i e RPA1 and input of the ICMcompact AMP IN EN fic E external synchronization the device selects automatically the synchronization source means that the line voltage will be used if there is no external voltage connected to the SYNC IN at the rear panel For this the ESYNC must be enabled RPA OPI within the submenu MISC the control voltage for the preamplifier can be turned off TER external gating is turned on see chapter 111 5 4 Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 13 There are two displays to indicate the captured PD activity In the Scope display every PD signal is shown on a phase resolved graph In the Meter display the peak value is shown on an analog meter 111 1 1 Scope Within the Scope mode there are 3 ways to display the PD pattern These types can be selected in the menu MODE and will be explained now Fig 8 shows the Scope display witn NORM mode activated see menu description for me
63. level might be necessary no partial discharge activity even with very high gain only noise signals are triggered on A sensible combination of gain and trigger level can be achieved by using a calibrator signal like described in chapter 111 4 The trigger level should be set between 50 and 90 of the calibration signal The gain should be set so that the reflection of the cable end is seen clearly and the first pulse is not too much over ranged For a later data analysis it is mandatory to capture at least one reflection Multiple Averaging le Freeze Instr Display green arrow trigger o k F a A A Cee ee ementi A A ooo 100 mV red arrow no trigger gain too low or trigger level too high Trigger level in percent no distinction between positive and negative pulses the arrow is movable with the mouse or settable by the Irg Level value 100 Trigger mode selectable a ER fu x us 2 between Auto Normal mm Single shot Position us Range us pao Gain Trg Level E automatic E 0 00 E 4 w E 10 ni 406 e xl m gain adjustment Pushing the button A next to the DSO Gain will automatically adjust the total amplification For this the gain is increased stepwise until the first signal reaches the trigger level The button next to the Trg Level selects the trigger mode With the Auto mode the DSO graph is up dated continuously independently of a trigger event With the Norm
64. ly stepwise and the test procedure must be con tinued after a failed specimen is removed EET x1 Once the test sequence is specified and saved the Tune CTET2 408 automated test can be started by loading the wanted Obieri Juidoor all Bushing sequence The specification data for the report have to Tesi spec Mauer IEC be entered and the test can be started The test report Cien ABC Powar will then be saved as can be seen in figure 82 Cleri Order Ao 121217 Order Hn Position Ho se al Ma 230423100 Testing Person ah Quafi f Drawing Ar Temperature 118 0 ip Hini of Test comment tw Preliminary Test C Final lrepectior C Repelitian C Redelon Repair Slat th Sequence amp auiomatic wWerheglepannungepr fung COO manual Tap Test Report Language C German English French Eancal DE Fig 82 Specification Field Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 64 Test Report 2901253001 Reference Ma Object Outdoor Wall Bushing Quantity k Type CTkf 73 400 Drawing Client ABC Power Preliminary test Client Order Ma 121212 Test spec EG T37 Serial Ma 230123100 Tests carried out Tightness test 1 5 bar rel 1 hour Measurement af dielectric dissipation factor and capacitance see pos 3 Measurement af dielectric dissipation factor and capacitance see pos 3 Check of dielectric
65. mA Other coupling units can be supplied by Power Diagnostix on request Fig 4 and Fig 5 display the standard preamplifier and standard coupling unit for the ICMcompact PD d Power Diagnostix Systems O ea PD Power Diagnostix gt C 0 6 5 5nF 50mA max S RPA1 Fig 4 Preamplifier RPA1 Fig 5 Quadrupole CIL4L 11 1 1 Optional Functions for the ICMcompact The instrument can be equipped with several optional features as e VLF option very low frequency allows measurements with 0 1Hz 0 05Hz and 0 02Hz This option requires also the HVM extension for the automatic voltage synchronization e Additional DSO board for Cable Fault Location Single PD pulses and their echo s are captured with a high sampling rate to localize faults in long cables The extended software version stores and analyzes the data see also chapter III 3 3 and VI e Additional voltage measurement and display HVM Display see also chapter IIl 3 1 e Extended synchronization frequency up to 510Hz e MUX The channel multiplexer allows a manual switching between 4 or 12 different PD sources e AUX The auxiliary inputs record further data like power temperature speed 111 3 5 e SIPA quick change of 12 different setups including the calibration data 111 3 6 e LOG Offers a logarithmic scaling for broad range PD signals 111 3 7 e Remote control interface RS232 Serial hardware link to the software packages e Software Driver If th
66. n File Prefix the chosen Phase name a consecutive number and the extension dso The quantity of files recorded can be set in the Max File Number field A value between 1 and 1000 can be chosen The option Scan non triggered allows to save also files which are not generated Fig 33 Settings entry window by a trigger event of the pulse This option might be helpful if heavily dis torted signals are present and a firm triggering to dominant PD pulses is not possible With this option randomly taken data are recorded and analyzed later For this the range should be long enough to search for PD pulses Fila Preig teed Scan naninggered Cancel ee WIN XU IM UN l CR RGUSSOT GE XU ME RA O mor m 7 t and their reflections within the data stream The acquisition is started by the Hume ince is ES Ok button and stopped by the Cancel button or if the number of files is euer an complete ud The Replay function can only be started if the instrument is offline It will open a sub window in which the scanned data files can be selected It must a ed re be pointed out that only data with the same time range should be selected Fig 34 File selection window 2t once After confirming the selection with the OK button a new sub window opens Here the recorded graphs are shown one after the other together with two cursors The path and filename of the current displayed graph is shown in the upper right hand
67. n be in creased by lt lt gt gt or decreased by gt gt lt lt The phase position is changed by POS gt gt a If a second windows is selected the distance A iL EN en to the first will be 180 for three windows the distances are 120 As in the previous menu the window pa rameters remain stored after deactivating the window function or when the instrument is switched off Fig 73 Three windows of 120 distance LLD 0 1 5 3 External Signal Gating TTL Gating optional If disturbances like switching of a relay or thyristor firing have a known source it might be possible to create a TTL signal prior to the disturbance This signal can be used to blind out the PD measurement path The TTL gating function is an optional function and has to be ordered separately ICMcompacfs with this optional function have a BNC connector on the back panel labeled TTL gate For the time this input is logically high 5Vpc TTL standard no signal is taken from the AMP IN terminal i e no PD signal is re corded Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 58 1 5 4 Gating With External Sensor Optional Analog Gating An effective noise reduction is required in case the ICMcompact is used for partial discharge measure ments in an environment with high frequency HF disturbance HF disturbances whi
68. n that will start when pressed They are not showing the current state of the program E g if the program is in the HOLD mode the first key F1 is labeled RUN By pressing this button the program turns to the run mode starts the acquisition and the button is labeled HOLD Without a serial connection to an instrument the program can not be turned into the RUN mode Load Fig 29 Offline instrument not connected Run stop Start stop Main l DSO Replay Report Load save Search C auhrzton Loe Panel EL Fig 30 Offline Replay function started Hold DSO scan Fig 31 Online in RUN mode Save Offline Exit Start Stat Main Calibration Tes stop Hald stop Calibration DSO scan Offline Report Load Save Fig 32 Online in RUN mode with Scan and Calibration function started Run Hold DSO F1 Ctrl u or Ctri o The program has two states for the DSO graph With the first state RUN the program takes continuously data from the instrument Depending on the trigger mode the DSO graph is updated continuously as well Three trigger modes can be selected by pushing the arrow next to the Trig Level field With the AUTO mode selected each transmitted curve is displayed With the NORM mode selected only triggered curves are displayed With the SINGLE mode selected only the first triggered curve is displayed then the program turns
69. nce from the fault pulse source to the end of the cable is calculated from the time difference At the two pulses occur at the measured end coupling unit Fig 21 shows an HV cable with a fault The traveling way of the first three pulses entering the coupling unit are displayed on top R Pulse Source Coupling Unit Near End Far End Open Fig 21 Propagation of a Pulse in a Cable 1 25 Fig 22 shows the time diagram of the three IR pulses entering the coupling unit The refer m ence pulse R travels the direct way to the 43 coupling unit The 1 reflection has traveled the opposite direction and is reflected at the open 21 end of the cable Thus resulting in a time delay MN Lo At which indicates the distance of the pulse A ENT UnG source to the far end The 2 reflection results from a reflection of the At Ato reference pulse at the near end and thereafter at the far end The time difference between the m 1 and 2 reflection At indicates the distance 109 on 10 20 30 40 so 80 us 70 of the pulse source to the near end Fig 22 Time Diagram Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 33 111 3 3 2 DSO Software The set up for the acquisition of PD pulses in TDR single PD pulses are observed has the same principle than for the PD pattern acquisition A detailed descrip
70. nnection of the Calibrator 2x cable length Eg eO TES a In the example given in figure 47 the Bill la pulse velocity vc 192 m us was inserted After the two cursors were positioned the cable length AX2 155 m was calculated It is also possible to calculate the pulse velocity if the cable length is know E E A A EE UC AR Lo EY e o gt EI A e e pou a a EH 3d T E SE 2 v b A BE FEET Gor I i ikim f 10 1 pG 0 0 ky iba iva Mg ruin TUE e md aon Bou icing egi start Eee toad FT CE Been pr Earl Fig 47 Time Diagram taken from the ICMcompact software Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 44 Measurement example with the TDR The next figures show measurement examples of a cable having a cable joint In figure 49 a joint was de tected at 95 7m measured from the far end Cable Joint Joint Distance o Near End Coupling Unit Far End Open Fig 48 Joint location 2x Joint Distance Fig 49 Joint location on a cable Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 45 Once the cable length has been specified and the joints are located the cable can be energized Figure 51 shows a measurement with one fault at 185 3m
71. nostix for details Software updates are available through Power Diagnostix s web site www pdix com The access to the download area of that Web Site is password protected and requires a valid software maintenance contract Contact Power Diagnostix for details Revisions of this manual and current brochures are available for download Adobes PDF Format through that Web Site as well This manual describes the ICMcompact including its miscellaneous functions These functions have to be ordered separately and are marked as optional functions For information regarding the accessories and special applications of the ICMcompact please contact Power Diagnostix I2 Instrument Safety Before using the ICMcompact read the following safety information and this manual carefully Especially read and obey the information which are marked with the words Warning and Caution The word Warn ing is reserved for conditions and actions that pose hazards to the user while the word Caution is re served for conditions and actions that may damage the instrument or its accessories or that may lead to malfunction Always obey the safety rules given with the warnings and with this chapter Especially take care of the safety issues while performing field measurements Never disregard safety considerations even under time constraints found often with on line and off line test on site N Warning e Always provide solid grounding of the instrument and the co
72. nu MAIN S Every partial discharge pulse is displayed as a vertical line at the phase angle where it occurs The length of the line is proportional to the apparent charge ampli tude The display refresh rate of the ICM compact is about 0 1s thus every picture shows the discharge pulses accumulated over the last five cycles of the test voltage at 50Hz The displayed sine wave helps to identify the phase position of the discharge impulses Fig 9 shows the scope display with SINE mode active The only difference between NORM mode and SINE mode is that in the SINE mode the impulses are superimposed onto the sine wave In the HOLD mode every partial discharge impulse activates a display pixel at the loca tion according to the pulse magnitude and the phase angle of occurrence Note that in this case the display is refreshed every 100ms which allows a visualization of the build up dynamics of a partial discharge pattern also called PD Map or phase amplitude distribu tion Changing the gain will reset the this display mode Despite the fact that the ICM compact can only count up to 1 pixel on off Fig 10 Scope Display Hold Mode and that other technical differences exist between the ICMcompact and the ICMsys tem the PD maps can be easily recognized and compared to the results obtained by the ICMsystem The resolution of the ICMsystem is 128 x 256 x 65536 16bit whereby the ICMcompact is unipolar and has a resolution of 80 x
73. oax or BNC adapter to the quadrupole Power Diagnostix offers two preamplifier suitable for this purpose The RPA1L is designed for laboratory environment and produc tion line and the RPA1H which is suitable for field test Both preamplifier have a frequency range of 40kHz to 20MHz The test voltage VLF high voltage source is also connected to the specimen core To mini mize noise and unwanted oscillations of the PD signal the coupling capacitor Cc should be connected as close as possible to the cable under test Also the earthing connections should be kept short as well The specimen screen should be connected closely to the quadrupole The fault location on cable TDR requires a point of reflection therefore the cable specimen should not be terminated at the far end nor short circuit Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 31 111 3 2 2 VLF Calibration Charge Calibration The calibration for a PD pattern acquisition in the VLF mode can be done in advance while in the line sync mode 50 60 Hz This is described in chapter IIl 4 3 However it is also possible to calibrate in the VLF mode e g 0 1Hz Both modes will result in the same calibration factor CF but CF is more facile to get in the line sync mode since the calibration signal is more easy to identify The calibration of the cable length for the TDR is
74. om if less or more reflections are visible After a single PD pulse is captured and hold menu MAIN D HOLD the current display can be zoomed in Each step of zooming ZOOM ZOOM will increase or decrease the visible part by 2us 200 Samples The black stripe at the lower side of the display illustrates the relation of visible time to the total acquired time of 80us 60ys Shifting the left position of the visible area by pushing the buttons POS or POS lt lt enables to analyze the complete wave in a high resolution The easiest way to evaluate the pulses is using the cursor functionality for the display Two cur sors are supported Each of them can be set individual to a time position by pushing the but tons POS or POS lt lt within the menu CURSOR Select first the cursor by pressing the upper button CURS1 or CURS2 Always the active cursor will be marked with a black filled triangle at the upper end of the vertical dotted EXIT line It is best to hold first the running acquisition before setting the cursors Moving the cursors Fig 54 Cursor Measurement on a PD pulse will automatically calculate the new time distance and the result for the distance in meter feet These values can be read off from the upper border of the display The distance on the HV cable is measured beginning from the far end of the measurement point also see chapter IIl 3 2 1 A sensible result can only be ensured if the pulse velocity is set cor
75. on jumps back to the previous menu upper level These ways are not visualized Ill 2 1 Overview Fig 14 gives an overview of the whole menus being accessible with the ICMcompact instruments The dimmed menus are optional and explained separately in the followed figures Menus with a gray shadow are optional menus e g HVM VLF DSO and gating They are only accessible if the respective function is included MODE MODE MODE gt pC DOWN NO CAL URS1 fase POS lt lt E MISC KEYB POS gt gt MORE ENGTH XIT EN GAIN LOWP P pues pe A E UT C AND m r r mit O Flolo x u J gt gt 013 3 ll MORE HIGHP_ LLD LIGHT T monet lt lt gt gt gt 40KH2 Paookrz smn stow Pscore pow Ippe E2 gt METER PD Power Diagnostix d LLL LL EZ ICMcompact Menu Structure Ver 2 67 V lt O UO O Z mio E MESSE azs O EXIT ANO mE I Q J m Co EXIT Fig 14 Whole menu overview Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com Partial Discharge Detector ICMcompact 17 1 2 2 Optional Key Menus Some text entries can vary depending on the several setup settings and of the state of the device All exit buttons will bring you back to the menu one level higher This path is not signed in The arrows are showing the
76. onannnnanonos 62 VI MISGENANEOUS ar ea A Eee EEE nee a EEE EEE ee Eee 65 VIII 1 Malena cenas 65 VIII 2 onipiment ASTUCIA nd 65 VIII 3 Beiro 66 IX FAQ TroubleSshootIN O enm 67 X Technical Data of the ICMcompact standard ooconnccconiciconncicnnncicccncnonanonnannnonnnrnnnnnrrnnanrrnnnnrrnannrenannnnns 68 X 1 ICMcompact with HVM integrated voltage measurement oocccconccccnncnccnccnnnnccnnnncnnonncnnnnnrnnnnannnnns 69 X 2 ICMcompact with DSO digital signal proCessor oocccoccccoccccccnccccnocncnconcnnnnnnnnnnnonnnonarononcnnnnnnnnnnos 70 POMPE ER 71 Copyright 2007 by Power Diagnostix All rights reserved No part of the content of this manual may be reproduced or transmitted in any form or by any other means without the written permission of the pub lisher Product and company names herein may be the trademarks of their respective owners Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 4 General I 1 About this Manual This manual describes the hardware software and usage of the CMcompact in its current version Some of the hardware features of the most recent versions are not available with earlier versions of the instrument It is possible to upgrade most of the previous instruments to the features of the current instruments Please contact Power Diag
77. ownloading the requested software and extracting the files the program setup exe will start the installation V Standard Software ICMcompact The standard software is also called ICMcompact and shows an image of the LCD display from the instru ment The acquired data like PD voltage if the optional HVM installed and AUX if installed are constantly refreshed The five menu buttons can be used like on the real instrument which allows a remote control even over longer distances For this the serial link can be extended by a fiber optic or in combination with a mo dem on both sides instrument and PC by a common phone line Power Diagnostix ICMcompact File Edit View Connect Measurement Options Help eals tale lg Record File Online A A E R S EIMLS 28 5 8iK V GA N Hemp ree Es Start Date 4 R3232 04 27 2007 RXD i E GAIN Start Time A WEE c TEENS A m E A AA 09 1 2 54 2 TXD Elapsed Time 1525 Residual Time Amp Channel Arp d i Amp Cunt Ohannoi Chi jv W8 257 rid E em T come 20 mz 7 son t a ea n 5 3 E A Een 1 cna I Ef one et 50 0Hz EXT 200 00pC DIV MAIN S nem 04 27 2007 09 13 22 624 50 pC EM MEE ap Ch TIT ME Cn id 6032pC 3 Qp Display Una x x x x x x x 8 55 kV Qp cur IV Op maxi J Qp av IV Op min Iv U rms Op peaksup v 8 59 kV Frequenc
78. p to 264V4c 47 to 440Hz The standard preamplifier RPA1 is connected to the AMP IN terminal with a normal 50 coax cable i e RG58 The amplified partial discharge signals as well as supply voltage and remote control signals to the pream plifier are carried via this cable The RPA1 acts as a 50 line driver and thus significantly increases overall sensitivity when working with longer cables up to 200m Furthermore the RPA1 enhances the sensitivity of the coupling unit essentially acting to match it to connecting cable impedance This requires that the RPA1 be connected as close as possible to the coupling unit Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 7 GAIN GAIN MODE METER SETUP OOOOO 50 0 Hz 25 00 pC DIV Qp lt 12 50pC MAIN qe C9 PD Power Diagnostix Bruesseler Ring 95a D 52074 Aachen 49 241 74927 Y K KY S N 000 9 if REMOTE SYNC IN REC OUT x Fig 3 Front Panel top and Rear Panel bottom of the ICMcompact Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 8 The CIL4L standard coupling unit is a so called RL coupling unit inductance resistance which is tuned to coupling capacitors in the range of 600pF to 2500pF Its permissible maximum charging current is 50
79. pling impedance is directly connected to the RPA1 preamplifier preferably using a BNC BNC adapter or a short length of BNC cable this minimizes the capacitive loading of the coupling unit and exploits the relatively high input impedance 10kQ 50pF of the RPA1 The quality of the connecting cable between the RPA output and the ICMcompact display unit AMP IN is fairly uncritical Up to lengths of 50m we recommend normal RG58 BNC cable RG213 cable having a lower attenuation is recommended for lengths up to 200m Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 10 1 1 2 1 Synchronizing the ICMcompact In the absence of an external synchronization signal the ICMcompact will automatically synchronize to the sine wave of the line voltage supplying power to the ICMcompact itself Often the high voltage applied to the test setup is not in phase with the line votlage and may not even be the same frequency as the line voltage In such cases it is best to synchronize the ICMcompact with an external signal To synchronize the ICMcompact on the high voltage applied to the test setup a voltage divider is needed to create a copy of the voltage wave The SYNC IN input is designed for voltage in the range of 1V to 100Vrus max 200Vpeax Regard the input impedance of the SYNC IN input is about Zi 1MQ 200pF With the optional VLF function sw
80. plitude 240 leads to a strong stabilization of the pointer and a reduced reading The button AUTO activates the auto range mode in which the gain is automatically adjusted It is reduced if the display reading continuously exceeds 90 full range and increased when the reading remains under 20 of the selected scale Each change in gain is indicated by a short beep from the built in loudspeaker From 1000 pC upwards the displayed unit changes from pC to nC Note Using sensitive coupling with high charge levels the system can be over ranged In this case we can provide input attenuators 1 10 and 1 100 The EXIT button moves back to the MAIN menu Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 16 111 2 Key Menus All functions described in this chapter base on the current firmware version 2 66 You can find the firmware number either by startup at the info screen or by selecting the INFO submenu while the instrument is run ning Older releases are not completely compatible to the newer ones Please contact Power Diagnostix to get update possibilities and prices Each menu consists of five entries one for each button and a name for the menu at the lower right hand side The background of the menu names are colored in the respective level color Each arrow shows the menu the user enters when pushing that button The EXIT butt
81. r both graphs into the Windows clipboard From Copy DSO Ctrl C Copy LOC Ctrl Shift L here they can easily be exported into other programs by Ctrl V CopyDSO LOC Ctri Shift C Instr Display070 12 Report Scan Settings List of Accessories Fig 38 Pull down menu Edit L gt The basic settings for a scan can be changed without starting a scan and even without being online by the Scan Settings menu The List of Accessories is a helpful tool to add information into the LOC graph In here cable accessories like sleeves junctions or terminations can be added and will be shown as small icons within the LOC graph The pull down menu Acquisition repeats functions which are already described on the previous pages The LOC graph on the right hand side can be disabled to enlarge the sition Window Options Help DSO graph This is helpful especially with long cable specimen to get a En Main Panel Dso better resolution for the positioning of the measurement cursor By default n SOLO Missis the DSO LOC is set to see both graphs Fig 39 Pull down menu Window Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 42 The Pulse Velocity propagation speed of electrical signals within the Options Hel SEE cable can be displayed as absolute value v or as halved value v
82. rectly E The pulse velocity can be calculated if the cable ES 25 9m v2 1525 0m MS length is know For this a calibration impulse has A to be injected into the near end of the cable Caution For calibration the HV supply has to be p turned off NE Once the trigger is set to the first largest pulse POS lt lt POS gt gt LENGTH also the echoes become visible Setting one cursor to the first pulse and the other to the sec ond pulse will read the calculated cable length i A2 l i Within the menu LENGTH the precise cable length can be set The pulse velocity is then Fig 55 Cursor Settings Length and Velocity calculated automatically using the settings of the cursors which are displayed at the upper right hand side Another possibility to get the specimen settings is to modify the pulse velocity directly This can be done in the menu SPEED which is accessible from the menu MODE D This function is useful if the cable length is not know but the type of cable A calibration is not obligatory Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact 48 Partial Discharge Detector 1 3 3 5 Key Menus for the DSO Overview Followed menus are accessible with an ICMcompact including the DSO for cable fault location GN TRG MODE SETUP ZM POS CURSOR SPEED UNIT EXIT GN TRG Pushing this button changes to the
83. rmany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 6 lI Installation 11 1 The Acquisition Unit The standard ICMcompact package includes the partial discharge detector the remote controlled preamplifier and the standard coupling unit CIL4L All PD detectors of Power Diagnostix are build on a modular concept Therefor it is possible to vary all external accessory parts like i e coupling units preamplifiers or calibration impulse generators For more details about all accessories please contact Power Diagnostix It depends on each application what kind of combination for coupling unit and preamplifier will bring best results Fig 2 shows a photo of the front view of the instrument in a half 19 rack The backlit liquid crystal display has a resolution of 240x128 pixels Fig 2 ICMcompact Photo The five control buttons are arranged to the right hand side of the LCD panel The brightness adjustment of the LCD is accessed using a small screwdriver immediately beneath the control buttons A temperature deviation of the environment will be compensated by the device itself On the rear panel of the standard 19 wide instrument are found the BNC connectors for signal input AMP IN the strip chart recorder output REC OUT the input for external synchronization SYNC IN and the optional serial connector REMOTE The instrument operates with mains supply in the range from 85V4c u
84. rtial Discharge Detector 35 Position The displayed range of the x axis can be shifted by the value r wameaweesra 17 Freeze Insi Display Position Whereas the trigger is always set as zero position of the x axis and a pre trigger time of 1us is fixed by the in strument However while in the RUN mode the Position will change this pre trigger time In the HOLD mode or when the instrument is offline the Position will change the displayed range but not the acquired data Position and Zoom will be adjusted in the HOLD mode automatically if one value is out of range mv us 2 5 Position will shift the x axis With the default value of Ous a pre EN ar a trigger time of 1us is displayed zs N 1 Aj 156 Fig 24 Screenshot of the DSO graph Range Zoom While in the RUN mode this value defines the total range in us This time base should be kept short to avoid unnecessary data transmission between the instrument and the software Example The ideal range for a cable of 1 4 km length and a known pulse velocity of 165 m us is between 18 and 20 us 2 x 1400m 165m us 16 97ys Due to the dispersion within the cable the time range should be set 10 20 higher than calculated This will ensure to get the complete reflected signal The value must be a multiple of 2us and can not exceed 80us The white bar underneath the DSO graph indicates the maximum possible range The gray bar indicates the actual
85. s button changes the position of each window The phase position value is shown at upper left side of the display 1 WIN 2 WIN 3 WIN OFF oelects the number of windows for this software gating The phase distances using two windows is 180 and 120 for three windows Press 1 WIN if you want to get one window for gating The key always indicates the next option Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 28 III 3 Optional Functions 111 3 1 HVM High Voltage Meter Display optional Instruments with the option of a HVM display high voltage meter are able to calculate and display the voltage waveform connected to the SYNC IN terminal The scaling of the amplitude and time base is done automatically so that one full waveform is displayed The calculated values Ugys and N2 can also be shown in the other selected displays SCOPE METER DSO however this will decrease their refreshing rate The Software ICMcompact is able to record these values together with PD level and the date time Please also regard the software introduction in chapter IV and the technical data in chapter VII 1 The displayed waveform has no impact on the calculation of the values shown in the top two rows or other U peak voltage resulting in a factor of 1 41 for mus effective voltage menus The crest factor Crest is calculated by
86. s output signal remains within the recom mended boundaries VIII 2 Shipment Instructions In case a unit needs to be returned to the factory make sure the acquisition unit is packed safely As the units are relative small shipment by couriers such as DHL FedEx or equivalent is the recommended mode of transportation If possible declare the instrument as used instruments for evaluation at a relative low value Consult Power Diagnostix for further details Additionally Power Diagnostix may provide you with a temporary replacement unit in case of urgent needs Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 66 VIII 3 Declaration of Conformity Power Diagnoxtix Systems GmbH Br sseler Ring 95a 52074 Aachen Germany declares that the instrument as specified below meets the requirements of the standards and or normative documents as listed below Subsequently the instrument complies with the requirements of the EMC directive 2004 108 EC Partial Discharge Detector Product ICMcompact Description Partial discharge detector for use in high voltage test area Standards EN 61000 6 1 EN 61000 6 2 EN 61000 6 3 EN 61000 6 4 EN 61010 1 Date Detlev Gross managing director Remark Since the measurement of partial discharge pulses is done in frequency bands partly occupied by radio transmission and since further t
87. scanned for possible instruments This are by default the ports COM1 and COM2 however up to 16 COM ports as well as GPIB and virtual LAN ports can be selected The selection can be changed in the MAIN Panel Options Interface Settings RS232 or GPIB or LAN During the program launch and when changing the panel the search function is activated automatically Start Calibration F7 Ctrl B This function calibrates either the cable length or the pulse velocity A detailed description is given on page 37 The calibration of the charge magnitude is done by the Qp Cal button within the Charge meter Whereas the voltage magnitude can be adjusted by the Divider button within the voltmeter Start LOC F8 Ctrl T This function starts the fault location LOC Location To activate the automatic mode the option Options LOC Graph Calculations Auto must be selected The processing of the measurements is based on the correlation frequency distribution and the results are shown in the right hand graph LOC graph Each trig gered curve which can be seen in the DSO graph is put into correlation with a reference pulse This refer ence pulse was prior artificially aged i e the dispersion of the cable is already taken into account After the correlation the maxima are put together in a three dimensional field With an increasing measuring time the reflection position will show accumulation points The sum of this accumulation points wit
88. submenu TRG M Within that menu the user can set the gain and trigger level for the PD display in time domain DSO display HOLD RUN Pushing this button switches between Hold and Run mode for the DSO display MODE Pushing this button changes to the submenu MODE D This submenu gives access to several settings of the DSO display as zoom position and cursor settings SCOPE METER Depending on the switched on displays see menu DISPL this function switches o the next display type SETUP Pushing this button changes to the SETUP menu As there are several setup menus this function enters ever in the last setup you ve been once before ZM POS Pushing this button changes to the submenu ZM POS Within that menu the user can set the zoom and the zero position for the DSO display CURSOR Pushing this button changes to the submenu CURSOR SPEED Pushing this button changes to the submenu SPEED UNIT Pushing this button changes to the submenu UNIT EXIT Pushing this button changes to the setup menu MAIN D GAIN GAIN Pushing this button increments decrements the total gain details see above These settings are independent from the gain settings in the menus SCOPE and METER TRG L TRG L Pushing this button displays and changes the trigger level More details are described above EXIT Pushing this button changes to the MAIN D menu Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 F
89. t the relevant system unit This setting is only accessible when the optional DSO is implemented mV pC Pushing this button changes the shown measurement value within the DSO panel mV is the peak value of the shown curve single PD pulse pC is the peak charge value as shown in the SCOPE or METER display EXIT Pushing this button changes to the setup menu MODE D Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 50 1 3 4 MUX Channel Multiplexer optional Instruments with a built in MUX multiplexer are able to switch between 4 or 12 different channels The front panel of an instrument with this option includes five extra buttons labeled A AMP V A SYNC V and LOCK These buttons enable to directly select one of the 4 or 12 signal sources Hereby the partial dis charge signal AMP and the voltage signal SYNC are split and can be selected separately The gain set ting calibration factor and divider factor if HVM is installed are stored separately for each channel Fig 56 ICMcompact with MUX multiplexer and HVM Fig 57 Status Display In the lower right hand corner the selected channel is displayed The first number indicates the AMP channel for the PD signal The next number shows which channel is taken for the SYNC or voltage measurement To avoid an unintended change of the channels the 5
90. the shape of discharges in the positive and negative half cycle e the absolute value of discharge in pC or nC e short time or continuous discharges Some installations make it necessary to correct the phase position of the pattern For example measuring on a three phase system without using the external synchronization where the line synchronization comes from one of the two other phases In that case a correction of 120 would be necessary This phase shift can be set at the menu SETUP2 LLDSET Please notice that the correct phase position is absolutely important for proper evaluations of the PD pattern To avoid the need for applying a phase shift coupling units that include a voltage divider circuit should be used to provide a signal for external synchronization e g CC20B For successful interpretation it is also necessary to get as much information as possible about the test ob ject and its environment Such information can be for example temperature installation condition age of the test object previous faults or weather conditions lt is useful to store typical PD patterns of known faults in an archive This can be done by using the PC software see Standard Software ICMcompact chapter IV 1 This customer specific database will be helpful for later evaluation on other test objects Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Dischar
91. tion of this set up is already given with the VLF mode in chapter 111 3 2 1 VLF Installation Except that the external synchronization SYNC to the HV is not neces sary x Near End Far End Open ICMcompact with DSO O HV Transformer or DEG Power Diagnostix Resonance Test Set ee VE O A ia gt Ipp FH G xj LL D gt Coupling Unit SL Fig 23 Example test set up for PD location on an HV cable Although the ICMcompact can be used as stand alone instrument for cable fault location the optional soft ware extension greatly simplifies the acquisition and analysis with the DSO board For this each instrument has a serial link RS232 labeled REMOTE used to connect to a common PC To protect the PC a proper earthing of the instrument is necessary Additionally an insulating fiber optical link for the RS232 should be used There are RS232 FOL converters available which are supplied by the serial link itself With the first online session the device code of the instrument has to be entered in the software After a successful initialization of the instrument the set up values of the instrument are loaded e g range gain trigger level cable length pulse velocity A software with the DSO extension will have a function button F9 labeled DSO Panel Pushing this button changes to the panel for the cable fault location This panel has two x y
92. to the HOLD mode The HOLD mode always displays the last triggered curve or last file which was loaded The program must be in the HOLD mode to start a replay of recorded data Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 39 Start Stop Replay Start Stop Scan F2 Ctrl A The second function key F2 changes its function depending on the program status Here are one of the most important functions for the data acquisition SCAN and evaluation REPLAY Only if the software has an online connection to the instrument the SCAN function can be used While offline the REPLAY function is available Both functions are closely linked The SCAN function saves measurement data in different files These files will have the extension dso and can be loaded and processed later while the software is offline The dso files contain only raw data to mini mize the memory requirements After the SCAN function is started a window like the one shown in fig 33 pops up The entry Data Directory defines the destination folder where all recorded files are stored It can either be entered manually or chosen from Duda Dinan x denm ers q oe ie the existing folder structure by the button Browse The entry File Prefix T i defines the name of the data files The later file name is put together from the entry i
93. ulse Generator CAL1A 1 2 5 10 20 50 100pC Injection Capacitor 1pF 50Hz 60Hz CAL1B CAL1C CAL1D CAL1E CAL1F 0 2 0 5 1 2 5 10 20nC Injection Capacitor lt 200pF 50Hz 60Hz CAL1G 0 02 0 05 0 1 0 2 0 5 1 2 nC Injection Capacitor 20pF 50Hz 60Hz CAL2A 0 5 1 2 5 10 20 50pC Injection Capacitor 1pF 50Hz 60Hz CAL2B 0 5 1 2 5 10 20 50V Voltage output 50 2 50Hz 60Hz into RL 50Q CAL2C 0 2 0 5 1 2 5 10 20V Voltage output 509 50Hz 60Hz into RL 50Q Tab 2 Output and Frequency Ranges of PD calibrators Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 54 All calibrators are switched on with the pushbutton On Off Both amplitude Range and polarity Pos Neg of the single charge pulse per cycle are dis played and can be adjusted by pressing of the two buttons The instrument is D PD CD synchronized to line frequency by a photo diode In case of insufficient pick up of power frequency light it will select automatically the internal quartz oscillator 50Hz and 60Hz versions available The button On Off must be 9 C9 pressed for more than 1 second to switch the pulse generator off while automatic switch off occurs after approximately 15 min pC Operation time of up to 200 hours are obtainable with the 9V lithium battery due to an average supply current of appro
94. ult by a small x This function can be enabled Visible or disabled Not Visible dso 270 The Projections red bars indicate the quantity of measured faults at 5 one cable position They also can be shown on or hidden off 7 The Projection Sensitivity defines kind of summation Depending on the setting High Medium or Low the segments in which the peak distribu Fig 44 Options1 LOC Graph tion is summed up as one red bar can be changed A High projection sensitivity results in small segments which will increase the total number of red bars and decrease the number of counts Options Help Calibration Mode Projection gt Not Visible When exporting the data from the LOC graph and the Report entries the selection Export File allows to suppress pulses from the cable ends Suppress End Reflections This is helpful if the user is only interested in faults within the cable and doesn t want to see pulses from the cable terminations Fig 45 Options Y m File With Language the inscription of the software as well as in the report files can be changed between Eng lish German and Spanish Some shortcuts used with ALT will change also Generally the letter which is underlined on a function button can be used as a shortcut Outside the pull down menu the ALT button has to be pressed while using the shortcut letter Within the pull down menu the underlined letter can be pressed directly
95. upgraded with the DSO board please contact Power Diagnostix for de tails Power Diagnostix Cable Fault Location Pm ES File Edit Connect Acquisition Window Options Help alala wE sel ES Multiple Averaging Freeze Instr Displamessung_10Ky__077 dso e SRPA X 2RXD TXD S ERR 40 pC N 00 E 125 o go ae N Lj 1 0 1 0 3 0 5 0 70 us 90 0 120 240 260 480 m 800 a T N Position us DSO Gain Trg Level 96 Cable Len m Vc mius Max Display m 0 00 8 Al 56 2 v Z 574 0 3 171 3 600 0 at 544us fj Al 466 3m M p 9 PM enn 109 Te 399 as Post 3727 m 4652m i A at 6724s I Al 5755m I ue U2 Pos2 460 1m j 5745m ff Aty 1270s PM Al 109 2m M rus E Pos3 4515m an 1093m gj hihw TRIN Xd Run Start Fig 77 Main Panel of ICMcompro with the DSO graph left and the LOC right The main panel shows in the top part two graphs DSO left and LOC right as can be seen in Fig 77 On the left hand site the DSO graph digital storage oscilloscope displays the actual PD waveform including its reflection at the cable terminations This is in principle the same graph as shown on the display of the instrument just with a higher resolution The software offers three colored cursor to evaluate the PD pulse Since the time difference of the reflections refers to the fault posi AX 1 95 Us A AM 1356 5m tion the calculated values in time and meter feet are listed in the Fig 78 First Evaluation
96. upling units Use the rear side wing nut terminal for ground connection System Ground see ll 1 2 Never operate the in strument without protective grounding e Use isolation techniques such as isolation transformers or fiber optic isolation to avoid haz ard and injury With applications bearing a high risk of electrical shock or breakdown use fi ber optic isolation in general e Avoid working alone e Do not allow the instrument to be used if it is damage or its safety is impaired e Inspect the ground leads and signal cables for continuity e Select the proper coupling circuit and connection for your application e Do not use the instrument in condensing or explosion endangered environment Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 5 I 3 Principle of Operation The ICMcompact partial discharge detector is designed for quality assurance and quality control tests of high medium and low voltage insulation in a test laboratory environment The instrument may be adapted to non conventional testing tasks such as field testing and diagnostics by use of various preamplifier and couplers The standard set Fig 1 red marked of the ICMcompact consists of a coupling unit CILAL a preamplifier RPA1 and the instrument The ICMcompact partial discharge detector is an autonomous instrument Simple screen shots and stor
97. urements of the test object e the TDAcompact optional to measure the tan and capacitance of the test object The STEPcompact together with the HVpilot software are newly developed to automate high voltage test sequences The three instruments are connected to a PC via serial link RS232 and exchange data with the HVpilot software This software also provides the possibility to program a test sequence analyze the meas ured data and generate a report automatically Several different test sequences can be created to customize the program for special measurement tasks The report files are created as doc or html and can also eas ily be customized Power Diagnostix HVpilot File Edt View Connect Measurement Options Help ETE ERE MEI 250 00 pc l 5 00E 3 Status 75 00 ky 1 00 nF NORM ICM compact Ap ids Offline Lia Cx STEPcompact offline 125 00 pc 2 50E 3 TANS 37 50 kv 0 50 nF Offline a WB 163 10 po A UrY2 WE 50 8 kv 0 00 pc 0 00E 0 0 00 ky l 0 00 nF tans ME D a 180 270 s 360 1 08E 03 E Test Sequence STEP FILE 1 Cy m E e i voltage 373 88 pF 51 0 kv 38 Time Frequency 000 00 01 28 5 342 Hi l a i 171 A A A EE YTEEYTEYTSEYE YT E MAE B l 2 Step Edit Search Load save xum seres o EMi x Fig 80 Main Panel of the HVpilot software for the automation of high voltage tests The main panel of the HVpilot software displays the 4 measurement values U V2 PD tan Cx
98. ushing this button changes to the setup menu SETUP1 EXIT Pushing this button changes to the main menu MAIN S MAIN M or MAIN D Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact 22 Partial Discharge Detector GAIN GAIN Pushing this button increments decrements the total gain by one step The calibration signal should be 50 90 of the total y axis range Changing the gain does not cali brate the system Use the buttons CAL or CAL to recalibrate CAL CAL These buttons can be used to enter the calibration value Together with the measured peak charge level the calibration factor is calculated and stored There is no possibility to make it undo The value should be set equal to the value shown on the connected pulse generator e g CAL1A For detailed information s about the calibration procedure see chapter 111 4 EXIT Pushing this button changes to the setup menu SETUP1 GAIN GAIN Pushing this button increments decrements the total gain by one step This will have no impact on the calibration factor CF CF These buttons can be used to set the calibration factor directly This function can be used to copy a previously done calibration For more detailed information s about the calibra tion procedure see chapter III 4 EXIT Pushing this button changes to the setup menu SETUP1 HIGHP Pushing this button changes to the menu
99. x 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 12 Hl Operation 111 1 Main Functions After switching on the ICMcompact the LC screen displays the ICMcompact logo and software version for about two seconds The instrument is controlled by the five pushbuttons on the front panel The individual functions are assigned to each button by the menu fields on the right side of the display There are several display modes and submenus available After power up and display of the ICMcompact logo the instrument automatically selects the display mode and submenu that were active when the instrument was last switched off In order to activate the MAIN menu you may need to press the EXIT button several times In this MAIN menu you can select either the METER MAIN M or the SCOPE MAIN S display mode If implemented also the HVM high voltage meter is avail able Devices with an additional acquisition board DSO board for cable fault location have an additionally display called DSO Figure 7 shows the ICMcompact in the menu MODE S An overview of the key menus can be found in III 2 1 Graphical Display of PD Data Current Functions of Menu Buttons Current y Value of Ap M parent Charge 50 0Hz EXT Frequency Message Current Label of Current Menu of Applied Voltage Abbreviation ocreen Resolution Fig 7 Parts of the ICMcompact display The display of the ICMcompact consists of graphic elements li
100. x 5mA quiescent current is negli T gible An alkaline battery resulting in approx 90 hours of continuous opera tion may replace the lithium battery A weak battery is indicated by the LO 1 NF BAT sign of the LC display On Off Warning While changing battery be aware of internal parts carrying up to 125V of DC potential Power Diagnostix delivers their standard calibrators with a fully traceable DKD calibration DKD K 31101 This calibration certificate documents the traceability to national standards which realize the units of measurement according to the International System of Units Sl The DKD Deutscher Kalibrierdienst is signatory to the multilateral agreement of the European co operation for Accreditation EA for the mutual recognition of calibration cer tificates O CAL1A Fig 65 Calibrator I 4 2 Calibration test set up The entire signal path from the discharging source to the instrument as well as some instrument proper ties as filters for instance are introducing an overall attenuation which is not precisely known Thus the calibrator CAL 1A or equivalent has to be connected to the actual PD source as close as possible Figure 66 shows an example of a calibration circuit diagram opecimen i Calibrato p opine High TEN Capacitor Voltage Supply ICM Fig 66 Example of calibration set up To calibrate a test setup where a current transformer as CT1 or CT100 is used place the positive
101. y Iv 50 0 Hz Aux Signal A N A Legend Op cur Gp av Aux Signal B Opec OD max OP min NIA 0 0 KV 0412772007 09 12 48 04 27 2007 09 14 03 04 27 2007 09 15 18 Qpsup U Os 1min 15s 2min 30s Setup Capture Expart imn Offline Record i Fig 6 Main Control Panel of the standard software ICMcompact The ICMcompact software can be used online and offline In the first online session the device code of the instrument has to be entered to keep the serial connection The PC will then actively communicate with the instrument and take the PD pattern and measurement values These acquired data can be stored and ex ported in different ways so that a repetition or later analysis of the measurement is feasible The export functions allow an easy way to create reports with all necessary information like data pattern and graphs Power Diagnostix Br sseler Ring 95a 52074 Aachen Germany Phone 49 241 74927 Fax 49 241 79521 www pdix com ICMcompact Partial Discharge Detector 61 VI Extended Software ICMcompact with cable fault location The optional software extension for cable fault location is specialized for high or medium voltage cable diag nostic This requires an ICMcompact instrument with the optional acquisition board DSO For the general functionality of this board and a detailed description of this software extension see also chapter III 3 3 DSO Display Older instruments can be

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