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1. ura a SU tue 68 9 2 CONTIMUMY TESISTAINCE 68 9o RODTESUN d osse doni mardi tae posl nce tado 69 9 3 1 General datd RENI M 69 9 3 2 Contact voltage gt 69 9 3 3 THBSOUE UME N addenda 70 9 3 4 EID O UG CUNE atta 70 94 Fault loop impedance and prospective fault current 71 9 5 Line impedance and prospective short circuit current 71 9 6 Resistance to earth MI 3102 72 Curren Il 102 nos iecit 72 9 8 9 10 2 RE 73 9 8 1 Illumination LUXmeter type 73 9 8 2 Illumination LUXmeter type 73 9 9 Phase TOLallorusss eiut E dede OA 73 9 10 Voltage and 73 9 11 Online voltage a 74 GONE Ali Cala 74 A diaria rc 76 B IT supply 77 Reduced low voltage supply systems 85 MI 3002 amp MI3102 Pre
2. FHL FACTOR Figure 4 6 Scaling factor adjustment menu Use the and keys to adjust the scaling factor and press the TEST key to accept the new setting The impedance limit values for different overcurrent protective devices are scaled down by a factor 0 8 or 0 75 Z factor This means that the fault current will still be high enough also at increased conductor temperatures and low supply voltage This assures a safe operation of the overcurrent protection device in all conditions 22 MI 3002 amp MI3102 Instrument operation 4 5 3 Language selection Select SET LANGUAGE in Setup menu by using the A and v keys and press the TEST key to enter the Language selection menu SET LANGUAGE gt ENGLISH DEUTSCH Figure 4 7 Language selecting menu By using A and keys select the language you want to use and press The TEST key to accept the new setting 4 5 4 Communication port selection Use the A and v keys in the Setup menu to highlight the SET COMMUNICATION PORT option and press the TEST key to enter the Communication menu COMMUNICATION gt RS 232 lt 9600 gt USB 115200 Figure 4 8 Communication menu By using the A and y keys select communication port you want to use If the RS232 communication port is selected use lt and gt keys to select baud rate The USB port has a baud rate set to 115200 bps Press the TEST key to accept the new setting Note O
3. 0 00 19 99 0 01 20 0 99 9 2 96 of reading 3 digits 100 1999 Max auxiliary earth electrode resistance 100 or 50 whichever is lower Max probe resistance 100 or 50 whichever is lower Additional probe resistance error at Remax OF 10 9o of reading 10 digits Additional error at V voltage noise 50 Hz 5 of reading 10 digits Open circuit voltage 45 Vac Short circuit voltage 20 mA Test voltage frequency 125 Hz Test voltage shape rectangular Noise voltage indication threshold 1 V 50 O worst case Automatic measurement of auxiliary electrode resistance and probe resistance Automatic measurement of voltage noise 9 7 TRMS current MI 3102 only TRMS current or TRMS leakage current Measuring range A Resolution A 0 0 99 9 mA 5 96 of reading 3 digits 100 999 mA 5 of reading 1 00 19 99 A 0 01 A Input resistance 1000 Maximal continuous input current 30 mA 30 A current clamp with ratio 1000 1 72 MI 3002 amp MI3102 Technical specifications Measurement principle cu
4. 0 06A 24 4kA Nominal voltage 100 440V 45Hz 65Hz Voltage frequency U OV 440V f 45Hz 65Hz 15 RCD EN 61557 6 Contact voltage Uc 0 00V 100 0V 0 000 10 00kQ 0 1 Fault loop resistance without tripping RCD Rs 0 000 10 U 0 00V 100 0V U R x hy Tripping time non delayed time delayed RCDs L Oms 300ms 500ms Oms 150ms 200ms Oms 40ms 150ms Us 0 00V 100 0V Tripping current 1 0 2xl 1 1 n Oms 300ms U 0 00V 100 0V ln 10mA 30mA 100 300mA 500mA 1 Multiplier x x1 x2 x5 Nominal voltage 100V 264V 45Hz 65Hz Phase rotation EN 61557 7 Nominal voltage 100V 440V 45Hz 65Hz Results 1 2 3 or 2 1 3 Figure 3 5 Bottom view MI 3002 amp MI3102 Instrument description 3 5 Carrying the instrument The neck strap supplied in standard set allows the instrument to be carried in a variety of different ways The operator can choose the most appropriate method based on the tasks they are performing See the following examples The instrument can be hung around operator s neck allowing the instrument to move freely This allows equipment to be moved quickly between test locations The instrument can be used from inside the soft carrying case test cables can be connected to the instrument through the front flap of the carry case 16 MI 3002 amp MI3102 Instrument operation 4
5. 04 5 us NENNEN L A 6 121 156 156 5 8 36 L 8 1 4 16 4 0 676 0576 20 196 224 20 05 05 30 092 1472 25 036 0398 0768 32 0288 0288 6 40 0232 022 80 S90 J 04184 04 0 0288 63 1 04 04 0 e 80 on f 2 12 100 9 0088 008 y o 1325 002 0072 Ll Fuse type BS 88 Fuse type BS 1362 Rated Rated kc 1 04 5 wo e NK ee ee m 18 56 S088 1611 26 3 344 Fuse type BS 3036 4 152 184 Rated Lo c 94 Se l 02 60 0 806 200 1052 10 0424 All impedances are scaled with factor 0 8 6 MI 3002 amp MI3102 IT supply systems B IT supply systems In order for the operator to be familiar with the measurements and their typical applications on IT supply systems it is advisable to read Metrel s handbook Measurements on IT power supply systems B 1 Standard references EN 60364 4 41 EN 60364 6 EN 60364 7 710 BS 7671 B 2 Fundamentals An IT supply system is a mains supply system that is insulated from ground PE i e it is ungrounded supplying system The system either has no direct connection to ground or the connection is provided through a relatively high impedance IT systems mainly occur in ar
6. ert 13 14 ET E 15 29 Carrying 16 4 Instrument operation 3 en eee nennen nnn nnn nnn 17 4 1 Meaning of symbols and messages on the instrument display 17 4 1 1 The online voltage and output terminal monitor 17 4 1 2 Message field battery 18 4 1 3 Message field measurement 18 4 1 4 pisce 19 4 1 5 ORION TINS SSO 19 4 1 6 Sound WARNING ua CUR oda S EEEE 20 4 1 7 Function and parameter 20 4 2 Selecting measurement function subfunction 20 4 3 Setting measurement parameters and limits 21 4 4 Menu ges aa 21 SSCP TSM 21 4 5 1 SUDDIV 22 4 5 2 Impedance scaling factor 22 4 5 3
7. EurotestDL XE 3002 3102 Instruction manual Version 1 0 HW 3 Code No 20 750 468 Wg lt MEIREL vi Distributor Manufacturer METREL d d Ljubljanska cesta 77 1354 Horjul Slovenia web site http www metrel si e mail metrel metrel si 2004 2008 METREL C C Mark on your equipment certifies that this equipment meets the requirements of the EU European Union concerning safety and interference causing equipment regulations No part of this publication may be reproduced or utilized in any form or by any means without permission in writing from METREL MI 3002 amp MI3102 Table of contents 1 mie 5 2 Safety and operational considerations 6 2 Wangs DnOEGS eie ca od oe iod deus ER CURE 6 22 BAWGE sspe ene ORE SURE MARTIN A Rd RR 9 20 GNON E 9 24 Precautions on charging of new battery cells or cells unused for a longer 10 2 9 rr Ve Pede 11 3 Instrument description 2 1 11 12 3 1 gene 12 MEME Go cesa
8. Step 3 Connect the appropriate test leads to the instrument and follow the connection diagram shown in figure 5 31 to perform phase neutral or phase phase line impedance measurement Use the Help function if necessary 45 MI 3002 amp MI3102 Measurements L1 E L2 IL pk 43 1111 Figure 5 31 Phase neutral or phase phase line impedance measurement Step 4 Check for warnings displayed on the screen and check the online voltage terminal monitor before starting the measurement If everything is ok press the TEST key After performing the measurement the results will appear on the display together with the PASS FAIL indication if applicable ua Eccc 4 n 3 v 549A Lim 7 164 230 Figure 5 32 Example of line impedance measurement results Displayed results rU Line impedance lac Prospective short circuit current Lim High limit fault loop impedance value if applicable Refer to chapter 6 1 Saving results for information on how to save the displayed results for documentation purposes Notes The fault loop impedance limit depends on fuse type fuse current rating fuse trip out time and Impedance scaling factor The specified accuracy of the test parameter is valid only if mains voltage is stable during the measurement 46 MI 3002 amp MI3102 Measurements 5 6 Phase sequence testing In practice we often deal with the conn
9. 55 V for single phase centre tap system selected 63V for three phase system selected Tests can be carried out for both combination L1 PE and L2 PE Each individual test result is accompanied with appropriate indication Nominal input voltages are Nominal input voltage Un Voltage range Single phase 55 V system 44 V XU 61 V Three phase 63 V system 56 V lt lt 70 V If an input voltage is out of range it is displayed on terminal voltage monitor together with the indicator of disabled test 87 MI 3002 amp MI3102 Reduced low voltage supply systems C 4 Technical specifications Only those technical specifications are listed below that are different to specifications from chapter 9 of this document C 4 1 RCD testing C 4 2 C 4 3 General data Nominal residual current 10 mA 30 mA 100 mA 300 mA 500 mA 1000 mA Nominal residual current accuracy 0 0 1 l4 lan 2xlan 9xlAN 0 1 l4 0 lA VoxlAN Maximum nominal differential current for declared accuracy 1000 mA for lan 500 mA for 2xlAN 100 mA for 5xlAN Maximum test current for Z LOOP lt 1 Q Test current shape oine wave AC pulsed DC offset for pulsed test current 6 mA typical DC general non delayed selective 5 time delayed Test current starting polarity 0 or 180 Nominal input vo
10. 5xlAN Multiplier 5 is not available if lt 1000 mA AC type RCDs or lan 300 mA A type RCDs Multiplier 2 is not available if lt 1000 mA A type 9 3 4 Trip out current Trip out current 14 10 mA Measurement range corresponds to EN61557 6 requirements Specified accuracies are valid for complete operating range Measuring range I Resolution Accuracy 0 2xlan 1 1xlan AC type 0 05 1 0 2xlan 2 2xlan A type 0 05xlan Trip out current lanz gt 30 mA Measurement range corresponds to EN61557 6 requirements Specified accuracies are valid for complete operating range Measuring range I Resolution 1 0 2xlan 1 1xlan AC type 0 05xla 0 2xlay 1 5xlan A type 0 05 1 Trip out time Measuring range ms Resolution ms 0 300 3 ms Contact voltage Measuring range V Resolution V 0 9o 10 96 of reading 0 0 9 9 0 1 2 digits 10 0 99 9 0 96 10 96 of reading 70 MI 3002 amp MI3102 Technical specifications 9 4 Fault loop impedance and prospective fault current Zs sub function Measuring range according to 61557 3 is 0 25 1999 Measuring range Resolution 0 00 19 99 0 01 20 0 99 9 5 of reading 5 digits 100 1999 Prospective fault current calculated value Measuring range A Resolution A 0 00 19 99 0 01 20 0 99 9 Consider accuracy of fault 100 999 loop resistance 1 00k
11. Contact voltage Refer to chapter 6 7 Saving results for information on how to save the displayed results for documentation purposes In case of testing the RCD A with rated residual currents of lAn 300 mA 500 mA and 1000 mA the x5 Auto tests will be automatically skipped In this case the auto test result passes if the t1 to t4 results pass and on the display are omitted 15 and 16 40 MI 3002 amp MI3102 Measurements 5 4 Fault loop impedance and prospective fault current The loop impedance function has two sub functions available Zs sub function performs a fast fault loop impedance measurement on supply systems which do not contain RCD protection Zs rcd trip lock sub function performs fault loop impedance measurement on supply systems which are protected by RCDs 5 4 1 Fault loop impedance The fault loop impedance measures the impedance of the fault loop in the event that a short circuit to an exposed conductive parts occurs i e a conductive connection occurs between the phase conductor and protective earth conductor In order to measure loop impedance the instrument uses a high test current Prospective fault current IPFC is calculated on the basis of the measured resistance as follows U I N PFC V Where Nominal input voltage Un Voltage range 115 100 V lt lt 160 V 230 V 160 V Uy pe lt 264 V For additional information concerning fault loop impedance measurement refe
12. Reference conditions Reference temperature range 10 C 30 C Reference humidity 40 RH 70 RH Operating conditions Working temperature range 09C 40 C Maximum relative humidity 95 0 C 40 C non condensing Storage conditions Temperature range 109 70 C 74 MI 3002 amp MI3102 Technical specifications Maximum relative humidity 90 RH 10 C 40 C 80 RH 40 C 60 C The error in operating conditions could be at most the error for reference conditions specified in the manual for each function 1 of measured value 1 digit unless otherwise specified 75 MI 3002 amp MI3102 Fuse base tables Fuse base tables Fuse type B Fuse type C Rated Rated current 04 5 f curet 04 5 A A 2 J 12204 122600 PP 6 11 6136 6136 6 X 3064 3064 10 368 568 10 14 184 16 2 296 2290 16 14192 115922 20 18 18 20 092 092 25 1472 1472 25 053 07360 32 14152 1152 3 0 X 0 676 0 576 40 02 092 40 046 045 50 X 0736 0736 55 098 0368 63 0064 0584 63 0298 0288 80 046 0456 40 022 02322 100 X 0368 0368 100 X J 0184 0184 1325 029 0296 125 0 144 0 144 Fuse type D Fuse type BS 1361 Rated Rated current
13. 14h via the instrument built in charger a Completely discharge the batteries this can be performed by using the instrument normally until the instrument is fully discharged Repeat the charge discharge cycle at least 2 4 times in order to restore the batteries to their normal capacity When using an external intelligent battery charger one complete discharging charging cycle can be performed automatically After performing this procedure a normal battery capacity should be fully restored and the operating time of the instrument will approximately meet the data set out in the in the technical specification Notes The charger in the instrument is a pack cell charger This means that the cells are connected in series during the charging so all of them must be in similar state similarly charged same type and age If even one deteriorated battery cell or just one of a different type e g capacity chemical design can cause disrupted charging of the entire battery pack which could lead to overheating of the battery pack and a significant decrease in the operating time Ifnoimprovement is achieved after performing several charging discharging cycles the state of each individual battery cells should be determined by comparing battery voltages checking them in a cell charger etc It is very likely that one or more of the battery cells could have deteriorated The effects described above should not be mixed with the norm
14. 300 ms ta lt 150 ms t4 lt 40 ms delayed RCDs selective time t gt 1999 ms 130ms t4 60 ms lt lt 50 ms lt lt delayed 500 ms 200 ms 150 ms Test current of cannot cause trip out of the RCDs For additional information concerning trip out time measurement refer to the Metrel handbook Measurements on electric installations in theory and practice How to perform trip out time measurement Step 1 Select the RCD function with the function selector switch and use the A v keys to select the Trip out time function RCDt The following menu will be displayed Figure 5 14 Trip out time measurement menu Step 2 Set the following measuring parameters Nominal differential trip out current Nominal differential trip out current multiplier RCD type and Test current starting polarity Step 3 Connect the leads to the instrument and follow the connection diagram shown in figure 5 12 see the chapter 5 3 6 Contact voltage to perform trip out time measurement Step 4 Check for any warnings and check the online voltage terminal monitor on the display before starting measurement If everything is ok press the TEST key 35 MI 3002 amp MI3102 Measurements After performing the measurement results will appear on the display along with a PASS FAIL indication Figure 5 15 Example of trip out time measurement results Displayed results Trip out time Con
15. A ACTA 19 5 35 10 20 20 40 50 100 T __30 15 105 30 42 60 84 150 212 v 300 150 105 300 424 600 848 1500 7 v 500 250 175 500 707 1000 1410 2500 v v 1000 500 350 1000 1410 2000 v v not available 9 3 2 Contact voltage Measuring range according to EN61557 6 is 3 0 V 49 0 V for limit contact voltage 25 V Measuring range according to EN61557 6 is 3 0 V 99 0 V for limit contact voltage 50 V Measuring range V Resolution V 0 0 9 9 0 1 0 10 96 of reading 2 digits 0 10 of reading Accuracy applies for 1 year in reference conditions Temperature coeficient ouside these limits is 1 digit Test current max 0 5xlAw Limit contact voltage 25V 50V Fault loop resistance at contact voltage is calculated as H ES AN 69 MI 3002 amp MI3102 Technical specifications 9 3 3 Trip out time Complete measurement range corresponds to 61557 6 requirements Specified accuracies are valid for complete operating range General non delayed RCDs Measuring range ms Resolution ms 0 300 lan 0 150 2xlan 3 ms 0 40 5xlan Selective time delayed RCDs Measuring range ms Resolution ms 0 500 Yxlan lan 0 200 2xlan 3 ms 0 150 5 1 Test current tote tat etate toe lan 2XlaN
16. B 3 5 Insulation monitoring device testing MI 3102 only How to check insulation monitoring device Step 1 Select the Insulation function with the function selector switch and use the l keys to select IMD check function The following menu is displayed Figure B 7 IMD check menu Step 2 Setthe following limit value o Faultresistance indicative o Calculated first fault current high limit value Step 3 Connect test cable to the instrument and to the item under test Follow the connection diagram shown in figure B 5 to check insulation monitor device Use the Help function if necessary Step 4 Check the displayed warnings and online voltage terminal monitor before starting the measurement If OK press the TEST key Use the lt gt keys to decrease indicative insulation resistance until insulation monitor device alarms bad insulation Indicative insulation resistance and calculated first fault current between first live conductor e g L1 PE conductor are displayed After performing the measurement results with PASS FAIL indication appear on the display Tit ima ku Figure B 8 First fault condition between L1 and PE Step 5 Use key to select second live line e g L2 Use the lt gt keys to decrease indicative insulation resistance until insulation monitor device 82 MI 3002 amp MI3102 IT supply systems alarms bad insulation Indicative insulation resistance a
17. Instrument operation 4 1 Meaning of symbols and messages on the instrument display The instrument display is divided into four sections L PE B 230 ein Figure 4 1 Display outlook Function and parameter line In the top line of the display the measuring function sub function and parameters are displayed 2 Result field In this field the main result and sub results together with the PASS FAIL ABORT status are displayed Online voltage and output monitor 4 Message field 4 1 1 The online voltage and output terminal monitor L PE Online voltages are displayed together with test terminal B 30 B 10 indication All three test terminals are used for selected 30 measurement L PE Online voltages are displayed together with test terminal 230 0 10 amp indication L and N test terminals are used for selected 230 measurement Polarity of test voltage applied to the output terminals L and N Unknown supply system N polarity changed Frequency out of range 17 MI 3002 amp MI3102 Instrument operation 4 1 2 Message field battery status Battery power indication Low battery indication Battery pack is too weak to guarantee correct result Replace the batteries Recharging is running if power supply adapter is connected 4 1 3 Message field measurement warnings messages Warning High voltage is
18. Insulation resistance uos Loop resistance Part 4 Resistance of earth connection and equipotential bonding Pall Oei Resistance to earth MI 3102 only Part 6 Residual current devices RCDs in TT and TN systems Part 7 Phase sequence Part 10 Combined measuring equipment DIN 5032 Photometry Part 7 Classification of illuminance meters and luminance meters Other reference standards for testing RCDs BS EN 61008 Residual current operated circuit breakers without integral overcurrent protection for household and similar uses BS EN 61009 Residual current operated circuit breakers with integral overcurrent protection for household and similar uses EN 60364 4 41 Electrical installations of buildings Part 4 41 Protection for safety protection against electric shock BS 7671 IEE Wiring Regulations 17 edition Note about EN and IEC standards Text of this manual contains references to European and British standards All standards of EN 6XXXX e g EN 61010 series are equivalent to IEC standards with the same number e g IEC 61010 and differ only in amended parts required by European harmonization procedure 11 MI 3002 amp MI3102 Instrument operation 3 Instrument description 3 1 Front panel Legend Figure 3 1 Front panel ON OFF key to switch the instrument on and off The instrument will automatically switch off 10 minutes after the last key press function
19. Language SCIGCHON 23 4 5 4 Communication port selection 23 4 5 5 Plug Tip commander support 23 4 5 6 Recalling original sed odd atas se datiuo dnt 24 4 6 Display contrast 25 5 Measurement S 6 oie set X X PT 26 5 1 Insulation resistance 8 26 SN ME PUT 28 SS ESTING RODG c 31 9 3 1 Limit contact 31 5 3 2 Nominal differential trip out current 2 31 D Oud Multiplier of nominal residual 31 5 3 4 RCD type and test current starting polarity 32 92 9 Testing selective time delayed RCDS 32 5 3 6 CONTACT 32 5 3 7 THDSOQUETIDIG ot ba oo 35 5 3 8 TOAD 36 5 3 9 Autotest 37 5 4 Fault loop impedance and prospective fault current 41 MI 3002 amp MI3102 Table of contents 5 4 1 41 5 4 2 The fault loop impedance test for RCD protected
20. V nominal voltage L1 11 55V 110V 110 V 55V L2 2 v L3 Single phase with center tap Three phase star connection center connected to PE i e 2 x 55 V tap connected to PE i e 3 x 63 V No neutral line a No neutral line Figure C 1 General reduced low voltage supply systems C 3 Measurement guides The user has to select the reduced low voltage supply system in the instrument before testing it The procedure for selecting the reduced low voltage supply system is defined in chapter 4 5 1 Supply system setup Once the reduced low voltage system is selected the instrument can be used immediately The instrument keeps selected reduced low voltage system when it is turned off 85 MI 3002 amp MI3102 Reduced low voltage supply systems The table below containsEurotest functions intended for test and measurement of supply systems with compatibility notes related to the reduced low voltage system ee functions functions Independent of selected supply system Insulation Independentofselected supply system Line resistance J Prospective short circuit imus SUE for Uji442 110 V Fault loop resistance Both fault loops R4 L1 PE and L2 PE Prospective fault current Voltage frequency Phase rotation Three phase system automatic detected RCD functions Contact voltage Uc For both posibi
21. after test In case the instrument gets moistened the results could be impaired In such case it is recommended to dry the instrument and accessories for at least 24 hours 9 2 Continuity resistance Measuring range according to EN61557 4 is 0 16 1999 Measuring range Q Resolution 0 00 19 99 3 of reading 3 digits 20 0 99 9 100 199 ONE Open circuit voltage 6 5 9 Voc Measuring current min 200 mA into load resistance of 2 Test lead compensation up to 5 Q MI 3002 amp MI3102 Technical specifications The number of possible tests with a new set of batteries up to 5500 Automatic polarity reversal of the test voltage 9 3 RCD testing 9 3 1 General data Nominal residual current 10 mA 30 mA 100 mA 300 mA 500 mA 1000 mA Nominal residual current accuracy 0 0 14 lan 2xlan 9xlAN 0 1 1 0 lA Test current oine wave AC pulsed A IC general non delayed selective 5 time delayed Test current starting polarity 0 or 180 Voltage range 100 V 264 V 45 Hz 65 Hz RCD test current selection r m s value calculated to 20 ms according to IEC 61009 ase ac IT A ACT AC RRR wma AC A A Ac AC
22. applied to the test terminals Warning Phase voltage on the PE terminal Stop all the measurements immediately and eliminate the fault before proceeding with any activity Measurement is running Consider any displayed warnings mad Measurement can be performed after pressing the TEST key Consider any displayed warning after starting the measurement al Measurement prohibited Consider any displayed warnings and check online voltage terminal monitor Test leads resistance in low value resistance measurement is compensated RCD tripped during the measurement The trip limit may be exceeded as a result of leakage current flowing to the PE protective conductor or capacitive connection between L and PE conductors RCD not tripped during the measurement Instrument overheated Temperature of internal components in the instrument reached top limit Measurement is prohibited until the temperature is lower then that limit Battery capacity is too low to guarantee correct result Replace the batteries BEE 2 18 MI 3002 amp MI3102 Instrument operation Fuse F1 continuity circuit blown or not inserted Single fault condition in IT system Noise voltage is present between H and E or S test terminals 3102 only Resistance of auxiliary earth electrode is higher than 100xRe Check the auxiliary earth electrode Probe resistance is higher than 100xRe Check the prob
23. circuits 43 5 5 Line impedance and prospective short circuit current 45 00 Fhaso a 47 Voltage and 48 5 8 Resistance to earth MI 3102 50 59 5 current 3102 52 Mi T102 o0nly task 54 NG 56 6 6 idee eee oe 58 S SAVING 59 6 2 Recalling nenne 60 0 9 Delelirig FOSUMNS 62 7 232 COMMUMICAION 65 7 1 PG SOMWA Conese 65 8 67 67 O 2 67 Penodi TT 67 EM vlc 67 9 Technical Specifications 68 9 1 TESIS ANCE
24. faulty connection of any line to PE is treated as first fault and is regular but it has to be repaired as soon as possible IEC 60364 4 41 In IT systems the following monitoring devices and protective devices may be used Insulation monitoring devices IMDs Residual current monitoring devices RCMs Insulation fault location systems Overcurrent protective devices Residual current protective devices RCDs Note Where residual current operating device RCD 15 used tripping of the RCD in the event of a first fault cannot be excluded due to capacitive leakage currents Testing of IT supply system is slightly different to standard tests in TN TT system 78 3002 amp MI3102 IT supply systems B 3 Measurement guides The user has to select the IT supply system in the instrument before testing it The procedure for selecting the IT supply system is defined in chapter 4 5 1 Supply system setup Once the IT system is selected the instrument can be used immediately The instrument keeps selected IT system when it is turned off The table below contains functions of the instrument including compatibility notes related to IT system IT system functions Notes SOBIHEH AUDCHOIES 422222227 Continuity Independent of selected supply system Insulation Independent of selected supply system Line impedance Prospective short circuit Ipsc for rated 142 cur
25. it is important to select the appropriate sub function in order to classify the measurement to be correctly considered in verification documents Electrical Installation Certificate Periodic Inspection Report etc How to perform a Continuity resistance measurement Step 1 Select the Continuity function with the function selector switch and the sub function with the w keys The following menus will be displayed Figure 5 4 Continuity measurement menu example for sub function R1 R2 Step 2 Setthe following limit value High limit resistance value Step 3 Connect test cable to the Eurotest instrument Before performing a Continuity measurement compensate for the test leads resistance as follows 28 MI 3002 amp MI3102 Measurements 1 Short test leads first as shown in figure 5 5 N L2 2 a Ln 1 LL prolongation lead Figure 5 5 Shorted test leads 2 Press the TEST key in order to perform regular measurement The displayed result should be close to 0 00 depending on the length of test leads used 3 Press the CAL key After performing test leads compensation the compensated test leads indicator Co will be displayed on the top line 4 n order to remove any test lead resistance compensation follow the procedure described in step3 with test leads separated from one another After removing any test lead compensation the compensation indicator will disappear from the top line of the disp
26. resistance measurement Use the Help function if necessary for further reference 26 MI 3002 amp MI3102 Measurements L2 2 5 s E N switched off 15 mains voltage D 5 gt m a U AY i Figure 5 2 Connection of universal test cable and tip commander Step 4 Check the displayed warnings and online voltage terminal monitor before starting the measurement If OK press and hold the TEST key until the result has stabilised Actual measured results are shown on the display during measurement After the TEST key is released the last measured results are displayed together with the PASS FAIL indication if applicable Figure 5 3 Example of insulation resistance measurement results Displayed results bonn Insulation resistance Um Actual voltage applied to item under test Refer to chapter 6 1 Saving results for information on how to save the displayed results for documentation purposes Warnings Note Insulation resistance measurement should only be performed on de energized objects When measuring the insulation resistance between installation conductors all loads must be disconnected and all switches closed Do not touch the test object during the measurement or before it is fully discharged Risk of electric shock When an insulation resistance measur
27. to be used for a long period of time remove all batteries from the battery compartment Alkaline or rechargeable Ni Cd or Ni MH batteries size AA can be used Metrel recommends only using rechargeable batteries with a capacity of 2100mAh or above Do recharge alkaline battery cells 2 3 Charging The batteries will begin charging whenever the power supply adapter is connected to the instrument The built in protection circuits control the charging procedure and assure maximum battery lifetime The power supply socket polarity is shown in figure 2 1 Figure 2 1 Power supply socket polarity Note Use only power supply adapter delivered from the manufacturer or distributor of the test equipment to avoid possible fire or electric shock MI 3002 amp MI3102 Safety and operational considerations 2 4 Precautions on charging of new battery cells or cells unused for a longer period Unpredictable chemical processes can occur during the charging of new battery cells or cells that have been left unused for long periods of time more than 3 months Ni MH and Ni Cd cells can be subject to these chemical effects sometimes called the memory effect As a result the instrument operation time can be significantly reduced during the initial charging discharging cycles of the batteries In this situation Metrel recommend the following procedure to improve the battery lifetime a Completely charge the batteries for at least
28. 10 Voltage and frequency 0 500 2 of reading 2 digits Nominal frequency range 0 Hz 45 Hz 65 Hz 73 MI 3002 amp MI3102 Technical specifications Measuring range Hz Resolution Hz 45 0 65 0 2 digits Nominal voltage range 10 V 500 V 9 11 Online voltage monitor Measuring range V Resolution V Accuracy 0 500 2 of reading 2 digits Nominal frequency 0 Hz 45 Hz 65 Hz If voltage greater than 500 V is applied to the test terminals online voltage monitor is used as voltage indicator only 9 12 General data Power supply voltage 9 Vpc 6x1 5 V battery cells size AA Power supply adapter 12V 15 V 400 mA Battery charging current lt 250 mA internally regulated typical 15 h Overvoltage CAT III 600 V CAT IV 300 V Plug commander optional overvoltage category CAT III 300 V Protection classification double insulation Pollution degree 2 Protection degree IP 42 128x64 dots matrix display with backlight Dimensions w x h x 23 cm x 10 3 cm x 11 5 Weight without battery 1 31 kg
29. 4k IPFC calculation Ippec x Ksc 2 Un 55 V 44 V lt U lt 61 V for selected 55 V single phase system Un 63 V 56 V lt U 70 V for selected 63 V three phase system TOS CUITODLD re reto tette provi 1 9 A 10 ms Nominal input voltage 55 63 V 45 Hz 65 Hz Test posibilities L1 PE and L2 PE Hs rcd trip lock sub function Measuring range according to EN6155 is 0 85 1999 Measuring range Resolution Q 0 00 19 99 10 96 of reading 15 digits 20 0 99 9 10 96 of reading 100 1999 10 96 of reading Acccuracy may be impaired in case of heavy noise on mains voltage Prospective fault current calculated value Measuring range A Resolution A 0 00 19 99 20 0 99 9 Consider accuracy of fault 100 999 top resistance 100k 9 99k measurement 10 0 24 4k IPFC calculation Ipec Un x Ksc 41 Un 55 V 44 V lt U lt 61 V for selected 55 V single phase system Un 63 V 56 V lt U 70 V for selected 63 V three phase system Nominal input voltage 55 63 V 45 Hz 65 Hz Test posibilities L1 PE and L2 PE No trip out of RCD 90 MI 3002 amp MI3102 Reduced low voltage supply systems C 4 6 Line resistance and prospective short circuit current Line resistance Measuri
30. 9 99k 22400 measurement 10 0 24 4k Test current at 230 7 5 A 10 ms lt lt 15 ms Nominal voltage 100 V 264 V 45 Hz 65 Hz Zs rcd trip lock sub function Measuring range according to EN6155 is 0 46 Q 1999 Q Measuring range Resolution Q 0 00 19 99 5 96 of reading 10 digits 20 0 99 9 10 of reading 100 1999 10 of reading Acccuracy may be impaired in case of heavy noise on mains voltage Prospective fault current calculated value Consider accuracy of fault o oo loop resistance measurement No trip out of RCD 9 5 Line impedance and prospective short circuit current Line impedance Measuring range according to EN61557 3 is 0 25 Q 1999 Q Measuring range Q Resolution 0 00 19 99 0 01 20 0 99 9 5 of reading 5 digits 100 1999 p O 71 MI 3002 amp MI3102 Technical specifications Prospective short circuit current calculated value Measuring range A Resolution A 0 00 19 99 0 01 20 0 99 9 Consider accuracy of line 100 999 NENNEN resistance measurement 1 00k 9 99k 10 0 24 4k Test current at 230 7 5 A 10 ms lt lt 15 ms Nominal voltage range 100 V 440 V 45 Hz 65 Hz 9 6 Resistance to earth MI 3102 only Measuring range according to EN61557 5 is 0 15 O 1999 Q Measuring range Resolution Q
31. ECT mai mai mai gt BOARD bel D bel BONDING Earth cond TEST to clear TEST to clear eazurement z eazurement z 1 Meazurementiz Figure 6 9 Menus for deleting all results in memory location and its subitems Step 2 Press the TEST key to delete the results in the selected memory location and all of the associated sub locations Press the TEST key again for confirmation or press MEM key to return to the menu for selection of memory location without changes How to delete all saved results Step 1 Select Clear memory in Memory menu by using the A and keys and press the TEST key to confirm The following menu is displayed Figure 6 9 Clear memory menu Step 2 Press the TEST key again to confirm that all results require deleting or press any cursor key or MEM key to return to the Memory menu without deleting any saved results 64 MI 3002 amp MI3102 RS232 USB communication 7 RS232 USB communication The MI3102 EurotestXE and MI3002 Eurotest DL include both RS232 and USB communication ports These ports can be used to send stored results through to a PC for reviewing editing and report building PS 2 RS 232 cable minimum connections 1 to 2 4 to 3 3 to 5 PS 2 for MI 3101 9 pin D female for PC Figure 7 1 Interface connection for data transfer over PC COM port 7 1 EuroLinkPRO PC software The EuroLinkPRO software allows the following activiti
32. Figure 5 35 Example of phase sequence test result Displayed results Phase sequence 1 2 3 Correct connection 2 3 1 Invalid connection m Irregular voltages Refer to chapter 6 1 Saving results for information on how to save the displayed results for documentation purposes 5 Voltage and frequency Voltage measurements should be carried out regularly while dealing with electric installations carrying out different measurements and tests looking for fault locations etc Frequency is measured for example when establishing the source of mains voltage power transformer or individual generator How to perform voltage and frequency measurement Step 1 Select the VOLTAGE function Volt with the function selector switch The following menu is displayed Figure 5 36 Voltage and frequency measurement menu Step 2 Connect test cable to the Eurotest instrument and follow the connection diagram shown in figure 5 37 to perform a voltage and frequency measurement Figure 5 37 Connection diagram 48 MI 3002 amp MI3102 Measurements Step 3 Check the displayed warnings The Voltage and Frequency test continually runs showing fluctuantions as they occur these results are shown on the display during measurement Figure 5 38 Examples of voltage and frequency measurements Displayed results Ul n Voltage between phase and neutral conductors Ul pe Voltage between p
33. T D RCD Tripout time FAIL EARTH COND 1 iine CONTINUITY 5 Ei 9J OIL d 5 CONTINUITY 2 10 LIGHT PROT 1 Tilim 507 CONTINUITY INATT GAS SERVICE1 g e CONTINUITY 3 OBJECT1 DIST BOARD1 CIRCUIT_A CONTINUITY 02 02 2007 14 16 Useri STRUCT STEEL1 RING CONT R1 RN CONTINUITY 0 129 S E OTHER SERV 1 e ie CONTINUITY r2 0 31 ZLOOP rit rN 4 0 088 EARTH 4 OBJECTi DIST BOARD1 CIRCUIT_A e 2100 02 02 2007 13 54 Useri ACD CONTINUITY 1 2 PASS Ri R2 0 812 R 0 89 R 0 82 5 DIST BOARD1 CIRCUIT_A 02 02 2007 13 53 Useri CONTINUITY R2 FAIL R2 0 73 amp R 0 798 R 0 79 Limit 0 42 I nreTr RADNA E Figure 7 2 Example of downloaded results Step 4 The software allows a variety of tasks to be performed including editting the downloaded structure for documentation purposes saving results parameters to an eul file or proceed to creation of appropriate Report Certificate Note USB drivers must be installed on PC before using the USB interface is used oee accompanying CD for further instructions about USB installation a For more information about the operation of the software application please see the help files available from the HELP option in the EurolinkKPRO software 66 MI 3002 amp MI3102 Maintenance 8 Maintenance 8 1 Replacing fuses
34. There are three fuses under back battery cover of the Eurotest instrument F1 0 315 250 V 20 5 mm This fuse protects internal circuitry of low value resistance function if test probes are connected to the mains supply voltage by mistake F2 F3 F4A 500 V 32x6 3 mm General input protection fuses for the L L1 and N L2 test terminals Warnings A Disconnect any measuring accessory from the instrument and ensure that the instrument is turned off before opening the battery fuse compartment cover hazardous voltage can exist inside this compartment Replace any blown fuses with exactly the same type of fuse The instrument can be damaged and or operator s safety impaired if this is not performed The Position of fuses can be seen in figure 3 4 in chapter 3 3 Back panel 8 2 Cleaning No special maintenance is required for the housing To clean the surface of the instrument use a soft cloth slightly moistened with soapy water or alcohol Then leave the instrument to dry totally before use Warnings Do not use liquids based on petrol or hydrocarbons Do spill cleaning liquid over the instrument 8 3 Periodic calibration It is essential that the test instrument is regularly calibrated in order for the technical specification listed in this manual to be guaranteed We recommend an annual calibration The calibration should be done by an authorised technical person only Please contact your dealer for furt
35. Water gt BONDING Oil gt BONDING Lightning gt BONDING Gas gt BONDING Structural Steel gt BONDING Other gt BONDING Earthing conductor gt DISTRIBUTION BOARD 999 gt CIRCUIT 001 gt CIRCUIT 002 gt CIRCUIT 499 gt EARTH ELECTRODE gt BONDING Water gt BONDING Oil gt BONDING Lightning gt BONDING Gas gt BONDING Structural Steel gt BONDING Other gt BONDING Earthing conductor OBJECT 002 OBJECT 999 Figure 6 1 Instrument memory organization The memory structure is organized in a way that is suited to the BS 7671 and other verification documents Electrical Installation Certificate Periodic Inspection Report 58 MI 3002 amp MI3102 Working with results etc If the results are stored in appropriate memory locations the automatic creation of a certificate report is possible via the PC software 6 1 Saving results How to save measurement results Step 1 When the measurement has completed press the MEM key The SAVE results menu is displayed with the last used memory location selected Save results Save results Save results gt OBJECT 881 gt OBJECT 8081 POARI B i Figure 6 2 Examples of Save results menu Step 2 The results can be saved into the selected memory location as follows By using the A Y keys position the cursor on the Object line Use the lt gt keys to select appropriate Object memory location three digit number By using the A Y k
36. al battery capacity decrease over time All charging batteries lose some of their capacity when repeatedly charged discharged The actual decrease in capacity compared to the number of charging cycles depends on the battery type This information is normally provided in the technical specification from battery manufacturer 10 MI 3002 amp MI3102 Safety and operational considerations 2 5 Standards applied The EurotestDL and EurotestXE instruments are manufactured and tested in accordance with the following regulations Electromagnetic compatibility EMC BS EN 61326 Electrical equipment for measurement control and laboratory use EMC requirements Class B Hand held equipment used in controlled EM environments Safety LVD BS EN 61010 1 Safety requirements for electrical equipment for measurement control and laboratory use Part 1 General requirements BS EN 61010 Safety requirements for hand held probe assemblies for electrical 031 measurement and test BS EN 61010 2 Safety requirements for electrical equipment for measurement 032 control and laboratory use Part 2 032 Particular requirements for hand held and hand manipulated current sensors for electrical test and measurement Functionality BS EN 61557 Electrical safety in low voltage distribution systems up to 1000 Vac and 1500 Vac Equipment for testing measuring or monitoring of protective measures Part 1 General requirements 2 sirios
37. ance scaling factor 8 DN 0 N Sub function CONTINUITY r1 r2 rN R1 R2 R2 High limit resistance value 2 0 INSULATION Low limit resistance value 1 MQ LINE Fuse type none selected F Fuse current rating none selected A Fuse tripping current none selected ms Fuse type none selected F ZS Fuse current rating none selected A Zs Fuse tripping current none selected ms Contact voltage RCD Uc Nominal differential current lan 30 mA Trip out time RCD t RCD type and test current starting polarity gt Trip out current RCD ill G Autotest RCD AUTO Limit contact voltage 50 V Nominal differential current multiplier x1 RESISTANCE TO EARTH High limit resistance value 50 MI 3102 only ILLUMINATION MI 3102 only Low limit illumination value 300 lux TRMS CURRENT MI 3102 only Current limit 4 5 mA 24 MI 3002 amp MI3102 Instrument operation 4 6 Display contrast adjustment When the low level backlight is activated press and hold the BACKLIGHT key until the Display contrast adjustment menu is displayed CONTRAST ECES Figure 4 9 Contrast adjustment menu Use the y keys to adjust the contrast level and when satisfied press the TEST key to accept the new setting 25 MI 3002 amp MI3102 Measurements 5 Measurements 5 1 Insulation resistance The Insulation resistance measurement is performed in order to ensure safety against electric shock Usi
38. ative memory location To exit the Recall results menu rotate the function switch 61 MI 3002 amp MI3102 Working with results 6 3 Deleting results When deleting results the following actions can be taken Individual results can be deleted Results memory location and its sub locations can be deleted a All saved results can be deleted The stored results can be deleted from the memory from the Memory menu To enter the Memory menu press the MEM key ll b 1 results gt Delete results Clear memory Memory free 94 Figure 6 7 Memory menu How to select result s to be deleted Step 1 Select Delete results from the Memory menu by using the A and keys to place the cursor next to the option and press the TEST key to confirm The Delete results menu will be displayed and the last used memory location will be selected Delete results BM Delete results D Delete results DM gt OBJECT 83 OBJECT 85 OBJECT 85 gt 1 BOARD Gai 8081 Hele Figure 6 8 Examples of menus for selection of memory location Step 2 To delete saved result s the memory location must be selected first The Object line can be selected with the w keys Use the lt gt keys to select the appropriate Object memory location three digit number In the lower part of the display two numbers will be displayed e g No 2 16 see figure 6 8 the first number is the num
39. ault loop impedance value if applicable Refer to chapter 6 1 Saving results for information on how to save the displayed results for documentation purposes The fault loop impedance limit depends on the fuse type fuse current rating fuse trip out time and Impedance scaling factor The specified accuracy of test parameters is valid only if mains voltage is stable during the measurement The Zs Fault loop impedance measurement trips RCD protected circuits 42 MI 3002 amp MI3102 Measurements 5 4 2 The fault loop impedance test for RCD protected circuits The fault loop impedance is measured with a low test current to avoid tripping the RCD This function can also be used for fault loop impedance measurement in system equipped with RCDs which have a rated trip out current of 10 mA and above Prospective fault current IPFC is calculated on basis of measured resistance as follows U EN Where Nominal input voltage Uu Voltage range 115 V 100 V lt lt 160 V 230 V 160 V lt lt 264 For additional information concerning fault loop impedance measurement refer to Metrel s handbook Measurements on electric installations in theory and practice 5 4 2 1 How to perform RCD trip lock measurement Step 1 Select the LOOP function with the function selector switch and use the v keys to select Zsrcd sub function The following menu is displayed Figure 5 28 Trip lock funct
40. ber of measurements stored in the selected Object memory location the second number is the number of measurements stored in the selected Object memory location and its sub locations i e D board Circuit Earth Electrode Bonding memory locations The D Board line can be selected with the A V keys Use the lt gt keys to select appropriate D Board memory location three digit number In the lower part of the display two numbers will be displayed e g 6 16 see figure 6 8 the first number is the number of measurements stored in the selected D Board memory location 62 MI 3002 amp MI3102 Working with results the second number is the number of measurements stored in the selected D Board memory location and its sub locations Circuit Electrode Bonding memory locations The Circuit Earth Electrode Bonding line can be selected with the A V keys The appropriate memory location Circuit or Earth Electrode or Bonding can be selected with the TEST key If the Circuit is selected use the lt gt keys to select the appropriate Circuit memory location three digit number In the lower part of the display No line the number of measurements stored in the selected Circuit memory location is shown If the Bonding is selected use the lt gt keys to select appropriate Bonding memory location e g Water Oil Lightning Gas Str Steel Earth cond In the low
41. clamps are suitable for use with the MI 3102 EurotestXE instrument in range 0 2 A 200 A Below 0 2 A they can be used as indicator only They are not suitable for leakage current measurements MI 3002 amp MI3102 Safety and operational considerations Illumination MI 3102 only For accurate measurement make sure that the milk glass bulb is lit without any shadows being cast on it e g by hand body or other unwanted objects etc It is very important to know that the artificial light source has reach full power illuminance see technical data of light source for time periods and should be therefore switched on for this period of time before any measurements are taken Testing the PE terminal The PE terminal can only be tested in the RCD LOOP and LINE functions For correct testing of PE terminal the TEST key has to be touched for a few seconds Make sure to stand on non isolated floor while carrying out the test otherwise test result may be wrong 2 2 Batteries A When connected to an installation the instruments battery compartment can contain hazardous voltage inside When replacing battery cells or before opening the battery fuse compartment cover disconnect any measuring accessory connected to the instrument and turn off the instrument Ensure that the battery cells are inserted correctly otherwise the instrument will not operate and the batteries could be discharged If the instrument is not
42. dication between these two wires is valid Insulation resistance If voltages of higher than 10 V AC or DC are detected between test terminals the insulation resistance measurement will not be performed Continuity functions If voltages of higher than 10 V AC or DC are detected between test terminals the continuity resistance test will not be performed Before performing a continuity measurement where necessary compensate test lead resistance MI 3002 amp MI3102 Safety and operational considerations RCD functions Parameters set in one function are also kept for other RCD functions measurement of contact voltage does not normally trip an RCD However the trip limit of the RCD may be exceeded as a result of leakage current flowing to the PE protective conductor or a capacitive connection between L and PE conductors The RCD trip lock sub function function selector switch in LOOP position takes longer to complete but offers much better accuracy of fault loop resistance in comparison to the R sub result in Contact voltage function RCD trip out time and RCD trip out current measurements will only be performed if the contact voltage in the pre test at nominal differential current is lower than the set contact voltage limit autotest sequence RCD AUTO function stops when trip out time is out of allowable time period Fault loop RCD trip lock impedance The low limit pros
43. e Resistances of auxiliary earth electrode and probe higher than 100xRe Check all probes 4 1 4 Result field Measurement passed Measurement failed Measurement is aborted Check the conditions at the input terminal lt 4 1 5 Other messages Instrument settings and measurement parameters limits Hard Reset are set to initial factory values For more information refer to chapter 4 5 4 Recalling original settings LUXmeter probe is turned off or disconnected from the No probe EurotestXE instrument Connect probe to the instrument using RS232 connector and turn it on MI 3102 only First measurement First stored measurement results are displayed Last measurement Last stored measurement results are displayed Memory full All memory locations are occupied Already saved Measurement results already saved Memory contents damaged Contact your distributor or CHECK SUM ERROR manufacturer for further information 19 MI 3002 amp MI3102 Instrument operation 4 1 6 Sound warnings Pressed key deactivated The shortest sound is not available Pressed key activated Measurement has been started after pressing the TEST key Consider any displayed warnings during measurement Short sound Measurement is prohibited Consider any displayed warnings check online voltage terminal monitor Warning Phase voltage on the PE terminal Stop all
44. eas where additional protection against electric shock is required Typical places are medical surgery rooms IT supply systems also has no grounding currents except leakages and in this way they are not suceptable to problems with step voltages e g voltage drops in a step or high energy sparking in extrinsic areas In normal situations a high impedance to ground exists and is formed by the capacitances of the supply wires to ground and the capacitances between the primary and secondary windings of the IT supply transformer A minor part of the capacitance is formed by Y capacitors EMC in the mains section of any connected equipment Selecting the appropriate transformer installation cabling and the selection of an optional high impedance connection to ground can control the maximum leakage current of the system Depending on the application additional impedances to ground can be applied or can occur through special loading equipment as presented in figure 1 The value of the impedance should be greater than 100 Q The IT system can provide an additional level of protection against electric shock In the situation where a failure occurs in any of the insulation between the line conductors and PE e g through equipment failure wrong application or procedure this system will remain safe but will be converted into TT type system However additional failure can be hazardous which means that the insulation must be continuousl
45. ection of three phase loads motors and other electro mechanical machines to three phase mains installation Some loads ventilators conveyors motors electro mechanical machines etc require a specific phase rotation and some may even be damaged if the rotation is reversed This is why it is advisable to test phase rotation before connection is made For information concerning phase sequence testing refer to Metrel s handbook Measurements on electric installations in theory and practice How to test the phase sequence Step 1 Select the PHASE ROTATION function with the function selector switch The following menu is displayed PHASE ROTATION Figure 5 33 Phase rotation test menu Step 2 Connect test cable to the Eurotest instrument and follow the connection diagram shown in figure 5 34 to test phase sequence option A 1110 result 1 2 3 result 2 1 3 Figure 5 34 Connection of universal test cable and optional three phase cable Step 3 Check for warnings on the display and check the online voltage terminal monitor The phase sequence test is a continuously running test hence the results will be displayed as soon as the full test lead connection to the item under test has been made All three phase voltages are displayed in order of their sequence represented by the numbers 1 2 and 3 47 MI 3002 amp MI3102 Measurements PHASE ROTATION S PH 1 2 3 L1 La Le E ius HR ip 398
46. ement has been performed on a capacitive object an automatic discharge may not be done immediately The warning message and actual voltage is displayed during discharge until the voltage of the item under test drops below 10 V In order to prevent damaging the test instrument do not connect test terminals to an external voltage higher than 600 V AC or DC If a voltage higher than 10 V AC or DC appears between the test terminals the insulation resistance measurement will not be performed 2 MI 3002 amp MI3102 Measurements 5 2 Continuity This function is used to test the resistance between two different points of the installation to ensure that a conductive path exists between them The test ensures that all protective conductors earth conductors or bonding conductors are correctly connected terminated and have the correct resistive value The Continuity measurement is performed with a test current of more than 200mA An automatic pole reversal of the test voltage and the test current is performed during the test This test checks for any components e g diodes transistors SCRs that may have a rectifying effect on the circuit which could cause problems when a voltage is applied This measurement completely complies with 61557 4 regulations Five Continuity sub functions are available Doo oD oD The continuity tests are carried out in the same way regardless of which sub functions is selected However
47. ep 3 Step 4 Notes By using cursor keys the following parameters can be set in this measurement Nominal residual current RCD type current starting polarity Connect the test leads to the instrument and follow the connection diagram shown in figure 5 12 see the chapter 5 3 6 Contact voltage to perform trip out current measurements Use the Help function if necessary Check for any warnings and check the online voltage terminal monitor shown on the display before starting the measurement If everything is ok press the TEST key After performing the measurement the results will be displayed along with a PASS FAIL indication Figure 5 17 Example of trip out current measurement result Displayed results bhonnan Trip out current Uci caris Contact voltage em Trip out time Refer to chapter 6 1 Saving results for information on how to save the displayed results for documentation purposes Parameters set in this function are also kept for other RCD functions RCD trip out current measurement will be performed only if the contact voltage at nominal differential current is lower than set limit contact voltage measurement of contact voltage in the pre test does not normally trip RCD However the trip limit may be exceeded as a result of leakage current flowing through the PE protective conductor or a capacitive connection between L and PE conductors 5 3 9 Autotest The purp
48. er part of the display the number of measurements stored in the selected Bonding memory location is shown If the Earth Electrode is selected the number of measurements stored in the selected Electrode memory location will be displayed in the lower part of the display To exit the Delete results menu without deleting any results rotate the function switch How to delete individual saved results Step 1 After the memory location Object D Board Electrode Bonding Circuit has been selected press the MEM key The cursor will jump down to the No line Delete results B Delete results D Delete results D OBJECT B63 OBJECT B63 OBJECT 85 BOARD 8081 81 CIRCUIT B i Ho 2 Hele Ielete Figure 6 8 Menus for deleting individual results Step 2 Use the lt gt keys to select the results you want to delete and press the TEST key Press the TEST key again to confirm that the results require deletion or press MEM key to return to the menu for the selection of different memory location without deleting any results 63 MI 3002 amp MI3102 Working with results How to delete all saved results in a memory location and its sub locations Step 1 After the memory location Object D Board Earth Electrode Bonding Circuit has been selected press the HELP key A warning will appear at the bottom of the screen asking for confirmation Delete results D Delete results D Delete results 0 27 gt OBJ
49. es a Data downloading Creation of Verification documents Export of measured data to a spreadsheet The EuroLinkPRO is a PC software running on Windows 2000 and Windows XP and Windows Vista operating systems How to download saved results to the PC Step 1 Connect the Eurotest instrument to PC using either the RS232 or USB cable Make sure that the correct communication port is selected and that the Eurotest instrument is switched on Refer to chapter 4 5 4 Communication port selection Step 2 Run EuroLinkPRO software on the PC Step 3 Select the Receive results icon or Instrument Receive results option from the menu The system will begin to download results saved in the instruments memory onto the PC After the result have been downloaded the following memory structure will be displayed 65 MI 3002 amp MI3102 RS232 USB communication 2515 things em name ltemT ype Full Medium Low SUB Items NEUE i Results CA 1 DIST BOARD1 FAIL EL 11 11 2005 13 03 Useri fh OBJECT Z LOOP PASS DIST BOARD 2 0 2589 CIRCUIT A 9304 RING CONT 22 Protection FUSE Fuse 51361 INSULATION Fuse 45k INSULATION Pc ee POLARITY 2 lim 1 05Q A SYS TN TT a 2 OBJECT1 DIST BOARD1 FAIL eae 11 11 2005 13 04 Useri CIRCUI
50. etent authorized personnel Use only standard or optional test accessories supplied by your distributor Consider that older accessories and some of the new optional test accessories compatible with this instrument only meet CAT III 300 V overvoltage safety rating This means that maximal allowed voltage between test terminals and ground is 300 V The instrument comes supplied with rechargeable Ni Cd or Ni MH battery cells The cells should only be replaced with the same type as defined on the battery compartment label or as described in this manual Do not use standard alkaline battery cells while the power supply adapter is connected otherwise they may explode Hazardous voltages exist inside the instrument Disconnect all test leads remove the power supply cable and switch off the instrument before removing battery compartment cover Donotconnect any voltage source on CLAMP CURRENT input It is intended only for connection of current clamp with current output The Maximum continuous input current is 30 mA All normal safety precautions must be taken in order to avoid risk of electric shock while working on electrical installations MI 3002 amp MI3102 Safety and operational considerations A Warnings related to measurement functions Insulation resistance Insulation resistance measurement should only be performed on de energized objects When measuring the insulation resistance between installation conducto
51. eys position the cursor on the D Board line Use the lt gt keys to select appropriate Distribution block memory location three digit number By using A Y keys position the cursor on the Circuit Earth Electr Bonding line Choose between the various options Circuit Earth Electrode or by pressing the TEST key If Circuit is selected use the lt gt keys to select the appropriate Circuit memory location three digit number If Bonding is selected use the lt gt keys to select the appropriate Bonding memory location Water Oil Lightning Gas Str steel Earth cond Step 3 After the memory location is set press the MEM key to save the results Saved to memory message will displayed to confirm that the results have been saved After saving the results the instrument returns to normal test screen Note Each measurement result can be saved only once 59 MI 3002 amp MI3102 Working with results 6 2 Recalling results Stored results can be recalled from the memory in the Memory menu To enter the Memory menu press the MEM key o 0 gt RECALL RESULTS DELETE RESULTS CLEAR MEMORY Memory free 18 6 Figure 6 3 Memory menu How to recall saved results Step 1 Select Recall results from the Memory menu by using the A and y keys and press the TEST key to confirm The Recall results menu will be displayed and the last used memory location wi
52. face 1 Preface Congratulations on your purchase of the Eurotest instrument and its accessories from METREL The instrument was designed on a basis of rich experience acquired through many years of dealing with electric installation test equipment The Eurotest instrument is professional multifunctional hand held test instrument intended to perform all the measurements required in order for a total inspection of electrical installations in buildings The following measurements and tests can be performed Voltage and frequency Continuity tests Insulation resistance tests RCD testing Fault loop RCD trip lock impedance measurements Line impedance Phase sequence IMD testing MI 3102 only Resistance to earth MI 3102 only TRMS current MI 3102 only Illumination MI 3102 only The large graphic matrix display with backlight offers easy to read results indications measurement parameters and messages The operation of the instrument is designed to be as simple and clear as possible and no special training except for the reading this instruction manual is required in order to begin using the instrument To become more familiar with how to perform measurements in general and in typical applications we recommend reading Metrel handbook Measurements on electric installations in theory and practice The instrument is equipped with all accessories required in order to perform testin
53. g comfortably The soft carrying bag included with the meter protect the instrument and keep all accessories together making it simple and easy to move between locations MI 3002 amp MI3102 Safety and operational considerations 2 Safety and operational considerations 2 1 Warnings and notes In order to maintain the highest level of operator safety while carrying out various tests and measurements Metrel recommends keeping your Eurotest instruments in good condition and undamaged When using the instrument consider the following general warnings The A symbol on the instrument means Read the Instruction manual with special care for safe operation The symbol requires an action the test equipment is used in a manner not specified this user manual the protection provided by the equipment could be impaired Read this user manual carefully otherwise the use of the instrument may be dangerous for the operator the instrument or for the equipment under test Donot use the instrument or any of the accessories if any damage Is noticed a Ifa fuse blows the instrument follow the instructions in this manual in order to replace it a Consider all generally known precautions in order to avoid risk of electric shock while dealing with hazardous voltages Donot use the instrument in supply systems with voltages higher than 550 V Service intervention or adjustment is only allowed to be carried out by a comp
54. hase and protective conductors Un pe Voltage between neutral and protective conductors U1 2 Voltage between phases L1 and L2 U1 3 Voltage between phases 1 and L3 U2 3 Voltage between phases L2 and L3 Refer to chapter 6 7 Saving results for information on how to save the displayed results for documentation purposes 49 MI 3002 amp MI3102 Measurements 5 8 Resistance to earth 3102 only The MI3102 EurotestXE can perform a 3 wire resistance to earth measurements This function is useful for testing the quality of the earthing electrode in TT and IT systems Consider the following instructions when performing resistance to earth measurement The probe 5 is positioned between the earth electrode and auxiliary earth electrode H in the ground reference plane see figure 5 40 distance from the earth electrode to the auxiliary earth electrode should be at least 5 times the depth of earthing electrode rod or the length of the band electrode If measuring the total earth resistance of a complex earthing system the required distance depends on the longest diagonal distance between the individual earthing electrodes For additional information concerning resistance to earth measurement refer to METREL s handbook Measurements on electric installations in theory and practice How to perform resistance to earth measurement Step 1 Select the EARTH function with functio
55. her information 8 4 Service For repairs under warranty or at any other time please contact your distributor Unauthorised person s are not allowed to open the Eurotest instrument There are no user replaceable components inside the instrument except for the three fuses inside the battery compartment refer to chapter 8 1 Heplacing fuses 67 3002 amp MI3102 Technical specifications 9 Technical specifications 9 1 Insulation resistance Insulation resistance nominal voltages 100 Vpc and 250 Measuring range according to 61557 2 is 0 017 MQ 199 9 MQ 5 of reading 3 digits 100 0 199 9 0 1 Insulation resistance nominal voltages 500 Vpc and 1000 Measuring range according to 61557 2 is 0 015 MQ 999 MQ Measuring range MQ Resolution MQ 0 001 2 of reading digits 72004999 4 10 96 of reading Voltage 3 of reading 3 digits Nominal voltages 100 Vpc 250 Voc 500 Voc 1000 Voc Open circuit voltage 0 20 of nominal voltage Measuring current min 1 mA at Ry Uyx1 Short circuit current max 3 mA Specified accuracy is valid if universal test cable is used while it is valid up to 200 if tip commander is used The number of possible tests with a new set of batteries up to 1800 Auto discharge
56. ing the measurement you want to perform press the HELP key in order to view the associated Help menu Press the HELP key again to see further Help screens if available or to return to the function menu 5 ou Figure 4 3 Example of helo menu 4 5 Setup menu In the Setup menu the following actions can be taken Supply system selection Impedance scaling factor adjustment Language selection Communication port settings Support for remote commanders DOovo DU To enter the Setup menu press the BACKLIGHT key and rotate function selector switch in any direction at the same time Rotate function selector switch again to leave Setup menu or setup sub menus Figure 4 4 Setup menu 21 MI 3002 amp MI3102 Instrument operation 4 5 1 Supply system setup The instrument enables tests and measurements in the following supply systems TN TT system IT system Reduced low voltage system 2x55 V Reduced low voltage system 3x63 V LJ L5 L5 Select SYSTEMS in the Setup menu by using A and y keys and press the TEST key to enter the Supply system setup menu REDUCED 554 REDUCED 6 amp 3 Figure 4 5 Supply systems selecting menu By using A and keys select supply system and press the TEST key to accept the setting 4 5 2 Impedance scaling factor adjustment Select SET Z FACTOR in Setup menu by using A and y keys and press the TEST key to enter the Impedance scaling factor adjustment menu
57. input MI 3102 only Warning Do not connect any voltage source to the current clamp input It is intended for the connection of current clamps with current output only The maximum continuous input current is 30 mA 13 MI 3002 amp MI3102 Instrument description 3 3 Back panel Figure 3 3 Back panel Legend Battery fuse compartment cover PATR Information label o Fixing screws for battery fuse compartment cover Figure 3 4 Battery and fuse compartment 14 MI 3002 amp MI3102 Instrument description Legend 1 Fuse F1 m FUSE F2 m FUSE F3 Serial number label Battery cells size AA o A N Battery holder 4 Bottom view Legend 1 Information label 2 Neck strap openings 3 Handling side covers Continuity EN 61557 4 LowQ 0 000 19990 Test current min 200mA Open circuit voltage 5 4V 9 0 Continuity 7mA 0 00 19990 Test current max 7mA Open circuit voltage 5 4V 7 2V Insulation resistance EN 61557 2 0 000MQ 199 9MQ 0 100 250 0 000MQ 999MQ 0 500 1 U OV 1200V Nominal voltages 100V 250V 500 1kV a Measuring current min 1mA at Ry U x 1kQ V Short circuit current lt 3mA Line resistance 0 002 19990 0 06 24 4kA Nominal voltage 100V 440V 45Hz 65Hz Fault loop resistance EN 61557 3 0 000 19990 1
58. ion menu Step 2 Set the following measuring parameters Fuse type Fuse current rating Fuse trip out time Impedance scaling factor see chapter 4 5 2 Impedance scaling factor adjustment The complete list of available fuse types be found in Appendix Step 3 Connect the appropriate test leads to the instrument and follow the connection diagram shown in figure 5 12 to perform RCD trip lock measurement see chapter 5 3 6 Contact voltage Use Help function if necessary 43 MI 3002 amp MI3102 Measurements Step 4 Check for warnings on the display and check the online voltage terminal monitor before starting the measurement If everything is ok press the TEST key After performing the measurement the results will appear on the display By 16H 1 45 Zi 42 v Izc S458 Lim 2 159 L PE zi Figure 5 29 Example of fault loop impedance measurement results using trip lock function Displayed result Fault loop impedance Prospective fault current Lim High limit fault loop impedance value if applicable Refer to chapter 6 1 Saving results for information on how to save the displayed results for documentation purposes Notes a The measurement of fault loop impedance using trip lock function does not normally trip an RCD However if the trip limit may be exceeded as a result of leakage current flowing through the PE protect
59. ive conductor or a capacitive connection between L and PE conductors The specified accuracy of test parameter is valid only if mains voltage is stable during the measurement 44 MI 3002 amp MI3102 Measurements 5 5 Line impedance and prospective short circuit current The line impedance is a measurement of the impedance of the current loop when a short circuit to the neutral conductor occurs conductive connection between phase conductor and neutral conductor in single phase system or between two phase conductors in three phase system A high test current is used to perform the line impedance measurement Prospective short circuit current is calculated as follows Where Nominal input voltage Un Voltage range 115 100 V lt lt 160 V 230 V 160 V lt Uy lt 264 V 400 V 264 V lt lt 440 V For additional information concerning line impedance refer to Metrel s handbook Measurements on electric installations in theory and practice How to perform line impedance measurement Step 1 Select the LINE function with function selector switch The following menu is displayed Figure 5 30 Line impedance measurement menu Step 2 Set the following measuring parameters Fuse type Fuse current rating Fuse trip out time Impedance scaling factor see chapter 4 5 2 Impedance scaling factor adjustment The complete list of available fuse types can be found in Appendix
60. lay The compensation of the test leads can be carried out in any of the Continuity sub functions r1 r2 rN R1 R2 R2 The compensation value will then be transferred to all other subfunctions Step 4 Ensure that the item for testing is disconnected from any voltage source Connect the test cables to the item under test Follow the connection diagrams shown in figures 5 6 and 5 8 to perform a Continuity measurement Use the Help function if necessary Figure 5 6 Connection for testing the r1 rN and r2 sections of the wiring 29 MI 3002 amp MI3102 Measurements Extension lead Figure 5 8 Connection for testing the R1 R2 section of the wiring Step 5 Check for any warnings and the online voltage terminal monitor on the display before starting the measurement If everything is OK press the TEST key After performing the measurement the results appear on the display together with the PASS FAIL indication if applicable Figure 5 9 Examples of Continuity measurement results Displayed results BET Main Continuity result average of R and R results 30 MI 3002 amp MI3102 Measurements Resistance sub result with positive voltage at L terminal R Resistance sub result with positive voltage at N terminal Refer to chapter 6 1 Saving results for information on how to save the displayed results for documentation purposes Warnings a Low value resistance measurements should onl
61. layed and instrument buzzer will sound Warning If phase voltage is detected on tested PE terminal stop all measurements immediately and remove the cause of the fault before proceeding with any activity Notes The PE terminal can only be tested with the function selector set to RCD LOOP or LINE For correct testing of PE terminals the TEST key has to be touched for a few seconds a When testing make sure the instrument operated is stood on non isolated floor otherwise the test result may be wrong 57 MI 3002 amp MI3102 Working with results 6 Working with results After a measurement is completed the results can be stored into the memory of the instrument together with any sub results and function parameters Electrical installations be represented by a multi level structure The instrument s memory storage is designed in a three level structure as follows a Object 1 structure level a Distribution Board 274 structure level a Circuit Earth Electrode Bonding conductors 3 structure level OBJECT 001 gt DISTRIBUTION BOARD 001 gt CIRCUIT 001 gt CIRCUIT 002 gt CIRCUIT 499 gt EARTH ELECTRODE gt BONDING Water gt BONDING Oil gt BONDING Lightning gt BONDING Gas gt BONDING Structural Steel gt BONDING Other gt BONDING Earthing conductor gt DISTRIBUTION BOARD 002 gt CIRCUIT 001 gt CIRCUIT 002 gt CIRCUIT 499 gt EARTH ELECTRODE gt BONDING
62. lities L1 PE and L2 PE Trip out time Trip out current Maximum nominal differential current limited to 1 A Automatic test Earth resistance Independent of selected supply system PE test probe Disabled C 3 1 Voltage Figure C 2 Example of voltage and frequency measurements Displayed results for single phase system L1 L2 Voltage between line conductors L1 pe Voltage between line 1 and protective conductors L2 pe Voltage between line 2 and protective conductors C 3 2 RCD testing Maximum regular RCD test current is 1 Ar m s 1 4 A peak and can be achieved only when fault loop resistance is lower than 1 Q Tests are carried out for both combinations L1 PE and L2 PE automatically Each individual test result is accompanied with appropriate indication 86 MI 3002 amp MI3102 Reduced low voltage supply systems Figure C 3 RCD contact voltage test C 3 3 Line resistance and prospective short circuit current Measured resistance represents Line Line resistance Ri 442 Nominal system voltage for calculation of Ipsc is set to 110 V Nominal system voltage range for line resistance measurement is 90 V to 121 V If input voltage is out of range it is displayed on terminal voltage monitor together with the indicator of disabled test C 3 4 Fault loop resistance and prospective fault current The definition of the nominal system voltage for calculating the changes to
63. ll be selected Recall results 2 5 Recall results 0 Recall results 2 gt OBJECT H l OBJECT 81 OBJECT gt 1 BOARD 001 Bii gt EARTH ELECTR Figure 6 4 Examples of menus for selection of memory location Step 2 recall saved result the memory location must be selected first The Object line can be selected with the w keys Use the lt gt keys to select the appropriate Object memory location three digit number In the lower part of the display two numbers will be displayed e g No 2 16 see figure 6 4 the first number is the number of measurements stored in the selected Object memory location the second number is the number of measurements stored in the selected Object memory location and its sub locations i e D board Circuit Earth Electrode Bonding memory locations The D Board line can be selected with the A V keys Use the lt gt keys to select appropriate D Board memory location three digit number In the lower part of the display two numbers will be displayed e g 6 16 see figure 6 4 the first number is the number of measurements stored in the selected D Board memory location the second number is the number of measurements stored in the selected D Board memory location and its sub locations Circuit Electrode Bonding memory locations 60 MI 3002 amp MI3102 Working with results The Circuit Earth Elect
64. ltage 55 63 V 45 Hz 65 Hz C 4 4 Contact voltage Measuring range according to 61557 6 is 3 0 V 32 6 V for limit contact voltage 25 range according to 61557 6 is 3 0 V 66 0 V for limit contact voltage 50 Measuring range V Resolution V 0 0 9 9 0 1 0 15 96 of reading 2 digits 10 0 99 9 0 15 of reading Accuracy applies for 1 year in reference condis coeficient ouside these limits is 1 digit VESUCUIFEIIE max 0 5xlan Limit contact voltage 25 50 The contact voltage is calculated to lan general type or to 2 selective type Fault loop resistance at contact voltage is calculated as H 72 88 MI 3002 amp MI3102 Reduced low voltage supply systems Trip out time Complete measurement range corresponds to 61557 6 requirements Specified accuracies are valid for complete operating range General non delayed RCDs Measuring range ms Resolution ms 0 300 lan 0 150 2 1 3 ms 0 40 5xlan selective time delayed RCDs Measuring range ms Resolution ms 0 500 Vexlaw lan 0 200 2xlan 3 ms 0 150 REI T lan 2XlaN 5xlAN oxl4w is not applicable for gt 100 mA RCD types AC A 2xlan is not applicable for 142500 mA RCD type AC 1402300 mA RCD type lan IS not applicable for la
65. me delayed marked with the 5 symbol The types of RCD the instrument is suitable for testing include Alternating residual current type marked with symbol Pulsating DC residual current A type marked with symbol Test current starting polarity can be started with the positive half wave at 0 or with the negative half wave at 180 EI S positive start polarity negative start polarity 09 1809 Figure 5 10 Test current started with the positive or negative half wave 5 3 5 Testing selective time delayed RCDs Selective RCDs demonstrate delayed response characteristics Trip out performance is influenced due to pre loading during measurement of contact voltage In order to eliminate the pre loading a time delay of 30 s is inserted before performing the trip out test 5 3 6 Contact voltage Leakage current flowing to the PE terminal causes a voltage drop across earth resistance which is called contact voltage Uc This voltage is present on all accessible parts connected to the PE terminal and should be lower than the safety limit voltage The parameter contact voltage is measured without tripping out the RCD R_ is a fault loop resistance and is calculated as follows R Uo IAN Displayed contact voltage relates to the rated nominal differential current of the RCD and is multiplied by a safety factor See the table 5 1 for detailed contact voltage calculation RCD type Contac
66. n selector switch The following menu is displayed Figure 5 39 Earth resistance measurement menu Step 2 Set the following measuring parameter Q High limit resistance value Step 3 Connect the leads to the instrument and follow the connection diagram shown in figure 5 40 to perform a resistance to earth measurement Use the Help function if necessary Test connector terminals are used as follows N L2 blue test lead is used for the earth electrode E a L L1 black test lead is used for the auxiliary earth electrode H PE L3 green test lead is used for the probe S 50 MI 3002 amp MI3102 Measurements id SS SN ES PR as S50 d Figure 5 40 Connection of standard 20 m long test leads Step 4 Check for warnings on the display and check the online voltage terminal Notes monitor before starting the measurement If everything is ok press the TEST key After performing the measurement the results will appear on the display together with the PASS FAIL indication if applicable Figure 5 41 Example of resistance to earth measurement results Displayed results resistance to earth Rc auxiliary earth electrode resistance Hp probe resistance Refer to chapter 6 1 Saving results for information on how to save the displayed results for documentation purposes If a voltage higher than 30 V is present between the test terminals the test
67. nce 33 MI 3002 amp 102 Measurements Lim Limit earth fault loop resistance value according to BS 7671 Refer to chapter 6 7 Saving results for information on how to save the displayed results for documentation purposes Notes Parameters set in this function are also kept for all other RCD functions The measurement of contact voltage does not normally trip an RCD However the trip limit may be exceeded as a result of leakage currents flowing through the PE protective conductor or a capacitive connection between the L and PE conductor RCD trip lock sub function function selector switch in LOOP position takes longer to complete but offers much better accuracy of a fault loop resistance result in comparison with the R sub result in Contact voltage function 34 MI 3002 amp MI3102 Measurements 5 3 Trip out time Trip out time measurement is used to verify the effectiveness of an RCD This is achieved by a test simulating an appropriate fault condition Trip out times vary between standards and are listed below Trip out times lt n to m BS EN VN 00 Led 2xhN 5xlhN General non ta gt 300 ms t4 lt 300 ms ta lt 150 ms ta lt 40 ms delayed RCDs selective time t4 gt 500 ms 130 ms t4 60 ms lt lt 50 ms lt lt delayed 500 ms 200 ms 150 ms Trip out times oe to 7671 Vel O General non gt 1999 ms ta lt
68. nd calculated first fault current between second live conductor e g L2 and PE conductor are displayed To complete measurement press the TEST key again After performing the measurement results with PASS FAIL indication appear on the display IMD CHECK BEC Figure B 9 First fault condition between L2 and PE Displayed results 1 Threshold indicative insulation resistance for L1 kh pue Calculated first fault leakage current at treshold insulation resistance for L1 2 Threshold indicative insulation resistance for L2 PME DP Calculated first fault leakage current at treshold indicative insulation resistance for L2 First fault leakage currents 1 and 12 are calculated as follows Uu gt where 2 Measured voltage between 1 and 12 BURN Threshold insulation resistance for 1 Threshold insulation resistance for L2 The calculated first fault current is the maximum current that would flow when insulation resistance decreases to the same value as the applied test resistance and a first fault is assumed between opposite line and PE Save displayed results for documentation purposes Refer to chapter 6 7 Saving results Note It is recommended to disconnect all appliances from the tested supply net to receive regular test results Any connected appliance will influence the insulation resistance threshold test The displayed resistances a
69. nd currents are indicative only Displayed resistance can significantly differ from the actual resistance the Eurotest simulates If IMD s with very low test currents below 1mA are checked the displayed resistance value is typically lower and current higher than the actual simulated resistance The difference is lower for lower set resistances 83 MI 3002 amp 102 IT supply systems B 4 Technical specifications MI 3102 only Only technical specifications that are different to the specifications from chapter 9 of this document are listed below B 4 1 First fault leakage current ISFL 0 0 9 9 ee s MN E reading 3 digits 10 19 1 696 Of reading Measuring resistance approx 1000 Q B 4 2 Calibrated resistances for IMD testing Test resistance 20 kQ to 650 kQ indicative values 64 steps Absolute maximum overload voltage 265 V Calculated insulation leakage current Measuring range mA Resolution mA 2 0 0 19 9 calculated value 84 MI 3002 amp MI3102 Reduced low voltage supply systems C Reduced low voltage supply systems C 1 Standard reference 57671 C 2 Fundamentals Special supply systems are applied where inherent protection against electric shock is required but no SELV used Reduced low voltage supply with ground reference can be used for this purpose There are two options with 110
70. ng range according to EN61557 3 is 0 25 1999 Measuring range Resolution 0 00 19 99 0 01 20 0 99 9 5 of reading 5 digits 100 1999 The accuracy is valid if mains voltage is stable during the measurement Prospective short circuit current calculated value measure range A Resolution A Accuracy ee 19 400 99 1 resistance measurement 1 00k 9 99k _ 100 10 0 24 4k IPFC calculation lpsc UNn X Ksc ZL N Un 110 V 90V lt U lt 121 V 3 1 A 10 ms Nominal input voltage 110 V 45 Hz 65 Hz 91 MI 3002 amp MI3102 Reduced low voltage supply systems 92
71. ng this measurement the following items can be determined Insulation resistance between installation conductors Insulation resistance of non conductive rooms walls and floors Insulation resistance of ground cables Resistance of semi conductive antistatic floors Doo dco For additional information concerning insulation resistance measurements refer to Metrel s handbook Measurements on electric installations in theory and practice Four Insulation resistance sub functions are available ISO L E ISO L N ISO L L ISO N E The insulation resistance tests are carried out in the same way regardless which sub functions is selected However it is important to select the appropriate sub function in order to classify the measurement to be correctly considered in verification documents Electrical Installation Certificate Periodic Inspection Report etc How to perform an insulation resistance measurement Step 1 Select Insulation function with the function selector switch and sub function with the keys The following menu is displayed Figure 5 1 Insulation resistance measurement menu Step 2 Set the following measuring parameter and limit values a Nominal test voltage a Low limit resistance value Step 3 Ensure that no voltages are present on the item for testing Connect the test leads to the Eurotest instrument Connect the test cables to the item under test see figure 5 2 to perform insulation
72. nly one port can be active at one time 4 5 5 Plug Tip commander support Select COMMANDER in the Setup menu by using the y keys and press TEST key to enable disable the support for remote commanders If disable is selected then keys on the Plug Tip commander are disabled except backlight key This implies that the selected test can only be started or results can be saved using the keys on the instrument lf enable is selected the keys on Plug Tip commander are activated and tests can be started and results saved either from the buttons on the instrument or the buttons on the remote commanders Note This option is intended to disable the commander s remote keys In the case of high EM interfering noise the operation of the commander s key can be irregular 23 MI 3002 amp MI3102 Instrument operation 4 5 6 Recalling original settings The following parameters and settings can be automatically set back to initial factory values Test parameters and limit values Contrast Impedance scaling factor Supply system Communication port Support for remote commanders DOOdOUD DL In order to restore the original setting of the instrument press and hold gt key and switch on the instrument the external charger must not be connected Hard reset message will be displayed at start up Instrument settings measurement parameters and limits are set to their initial values as follows Imped
73. ose of the autotest function is to perform a complete RCD testing and measurement of most important associated parameters contact voltage fault loop resistance and trip out time at different fault currents with one press of a button If a faulty parameter is noticed during the autotest the test will stop to highlight the need for further investigation Notes a The measurement of contact voltage in the pre test does not normally trip an RCD However the trip limit may be exceeded as a result of leakage current flowing 3 MI 3002 amp MI3102 Measurements through the PE protective conductor or a capacitive connection between L and PE conductors The autotest sequence stops when the trip out time is out of allowed time period 5 3 9 1 How to perform RCD autotest Step 1 Select RCD function with the function selector switch first Use the A V keys to select RCD autotest function AUTO The following menu is displayed wii me mz Mo MS nux shi ZMS Uc Figure 5 18 RCD autotest menu Step 2 Set the following measuring parameters a Nominal differential trip out current a RCD type Step 3 Connect the test leads to the instrument and follow the connection diagram shown in figure 5 12 also see the chapter 5 3 6 Contact voltage to perform the RCD autotest Use the Help function if necessary Step 4 Check for any warnings and check the online voltage terminal monitor displayed on the screen before star
74. pective short circuit current value depends on fuse type fuse current rating fuse trip out time and impedance scaling factor The specified accuracy of tested parameters is valid only if the mains voltage is stable during the measurement Fault loop impedance measurements will trip an RCD The measurement of fault loop impedance using trip lock function does not normally trip an RCD However the trip limit may be exceeded as a result of leakage current flowing to the PE protective conductor or a capacitive connection between L and PE conductors Line impedance The low limit prospective short circuit current value depends on fuse type fuse current rating fuse trip out time and impedance scaling factor The specified accuracy of tested parameters is valid only if the mains voltage is stable during the measurement Resistance to earth MI 3102 only If voltage between test terminals is higher than 30 V the resistance to earth measurement will not be performed lfa noise voltage higher than approx 5 V is present between the and or S test terminals the noise warning symbol will be displayed indicating that the test result may be incorrect TRMS current MI 3102 only Use only test clamp supplied by Metrel or another clamp with similar characteristics current output ratio range Consider the error of the test clamp when evaluating measured results Metrel A 1074 and 1019 current
75. played together with the PASS FAIL indication if applicable Figure 5 44 Example of TRMS current measurement result Displayed results dono TRMS current or TRMS leakage current Refer to chapter 6 1 Saving results for information on how to save the displayed results for documentation purposes Notes Use test clamp supplied by METREL or another clamp with similar characteristics current output 1000 1 clamp ratio appropriate measuring range consider the error of the test clamp when evaluating the measured results Current clamps Metrel 1074 and 1019 are suitable for use with MI 3102 EurotestXE instrument in range 0 2 A 200 A Below 0 2 A they can be used as indicator only They are not suitable for leakage current measurements 5 MI 3002 amp MI3102 Measurements 9 10 Illumination MI 3102 only The illumination measurements should be performed whenever planning or installing indoor or outdoor lighting Illumination measurement can be performed using a LUXmeter probe connected to the RS232 connector of the instrument The EurotestXE instrument supports type B LUXmeter and type C LUXmeter probes How to perform illumination measurement Step 1 Select the SENSOR function with the function selector switch The following menu is displayed Figure 5 45 Illumination measurement menu Step 2 Set the following limit value a Low limit illumination value Step 3 Connect LUXmeter probe to the in
76. r to Metrel s handbook Measurements on electric installations in theory and practice 5 4 1 1 How to perform fault loop impedance measurement Step 1 Select the LOOP function with the function selector switch and use the v keys to select the Zs sub function The following menu is displayed Figure 5 25 Loop impedance measurement menu Step 2 Set the following measuring parameters Fuse type Fuse current rating Fuse trip out time Impedance scaling factor see chapter 4 5 2 Impedance scaling factor adjustment The complete list of available fuse types can be found in Appendix A 41 MI 3002 amp MI3102 Measurements Step 3 Connect the test leads to the instrument and follow the connection diagram shown in the figure 5 26 to perform fault loop impedance measurement Use the Help function if necessary Figure 5 26 Connection of plug cable universal test cable Step 4 Check for any warnings displayed on the screen and check the online Notes voltage terminal monitor before starting the measurement If everything is ok press the TEST key After performing the measurement the test results will appear on the display together with the PASS FAIL indication if applicable Figure 5 27 Example of loop impedance measurement results Displayed results Fault loop impedance lac Prospective fault current displayed in amps Lim High limit f
77. rent Fault loop impedance be Prospective fault current Voltage frequency Phase rotation RCD functions Independent of selected supply system Contact voltage Uc ees Trip out time Trip out current Bypassing principle shown in figure B 3 Automatic test Earth resistance Independent of selected supply system PE test probe Active but does not inhibit selected test if voltage is detected B 3 1 Voltage Figure B 2 Example of voltage and frequency measurements Displayed results for single phase system L1 L2 Voltage between line conductors L1 pe Voltage between line 1 and protective conductor L2 pe Voltage between line 2 and protective conductor 79 3002 amp MI3102 IT supply systems B 3 2 Line impedance see chapter 5 5 Line impedance and prospective short circuit current the measurement is the same only terminal voltage monitor indication corresponds to IT system B 3 3 RCD testing RCD testing is performed in the same way as in TN TT system See chapter 5 3 Testing RCDs with the following exception Contact voltage measurement is not relevant Test circuit with bypassing principle should correspond to that in figure B 3 Figure B 3 RCD testing in IT system B 3 4 First fault leakage current ISFL MI 3102 only First fault leakage current measurement is performed in order to verify the maximum current that could leak into PE from observed line This current flows thro
78. rent started with the negative half wave at 180 Measurement normally trips an RCD within allowed time period The following menu is displayed Figure 5 22 Step 4 RCD autotest results After re activating the RCD the autotest sequence automatically proceeds with step 5 5 Trip out time measurement with the following measurement parameters current of 72xlAw Test current started with the positive half wave at 0 39 MI 3002 amp MI3102 Measurements Note Measurement does not normally trip RCD The following menu is displayed Figure 5 23 Step 5 RCD autotest results After performing step 5 the RCD autotest sequence automatically proceeds with step 6 6 Trip out time measurement with the following measurement parameters Test current of 72xlAw Test current started with the negative half wave at 180 Measurement does not normally trip an RCD The following menu is displayed 1 xa FSB llc By 4ly Figure 5 24 Step 6 RCD autotest results Displayed results x1 left Step 1 trip out time result t3 lan 0 X1 right Step 2 trip out time result t4 Ian 180 x5 left Step 3 trip out time result t5 5 0 x5 right Step 4 trip out time result t6 5 1809 x left Step 5 trip out time result t1 VexlAw 0 X right Step 6 trip out time result t2 xlan 180
79. rode Bonding line can be selected with the A v keys The appropriate memory location Circuit or Earth Electrode or Bonding can be selected with the TEST key If the Circuit is selected use the lt gt keys to select the appropriate Circuit memory location three digit number In the lower part of the display No line the number of measurements stored in the selected Circuit memory location is shown If the Bonding is selected use the lt gt keys to select appropriate Bonding memory location e g Water Oil Lightning Gas Str Steel Earth cond In the lower part of the display the number of measurements stored in the selected Bonding memory location is shown If the Earth Electrode is selected the number of measurements stored in the selected Electrode memory location will be displayed in the lower part of the display Step 3 Once the memory location is set press the MEM key and the cursor will jump down to the line Recall results 2 OBJECT 81 81 Figure 6 5 Menu for selection of measurements Use the lt gt keys to select the function for which you want to view results and press the TEST key to confirm Figure 6 6 Examples of recalled results menu Under the same memory location the other saved results can be viewed by using the lt gt keys Pressing the MEM key returns the instrument back to the Memory Menu in order selection of an altern
80. rrent clamp ratio 1000 1 Nominal 45 Hz 65 Hz Additional clamp error has to be considered 9 8 Illumination MI 3102 only 9 8 1 Illumination LUXmeter type B Specified accuracy is valid for complete operating range 5 96 of reading 2 digits 200 1999 1 590 of reading 2 00 19 99 k Measurement principle silicon photodiode with V 2 filter Spectral response error lt 3 8 9o according to CIE curve COSINE eiie eie ei 2 5 up to an incident angle of 85 Overall accuracy matched to DIN 5032 class B standard 9 8 2 Illumination LUXmeter type C Specified accuracy is valid for complete operating range Measuring range lux Resolution lux 0 01 19 99 0 01 10 of reading 3 digits 0 1 199 9 200 1999 10 of reading 2 00 19 99 k Measurement principle silicon photodiode COSINE lt 2 5 up to an incident angle of 85 Overall accuracy matched to DIN 5032 class standard 9 9 Phase rotation Nominal mains voltage range 100 Vac 440 Vac Nominal frequency range 45 Hz 65 Hz Result displayed 1 2 3 or 2 1 3 9
81. rs all loads must be disconnected and all switches closed a Do not touch the test object during the measurement or before it is fully discharged Risk of electric shock a When an insulation resistance measurement has been performed on a capacitive object automatic discharge may not be done immediately The warning message and the actual voltage is displayed during discharge until voltage drops below 10 V a Do not connect test terminals to external voltage higher than 550 V AC or DC in order not to damage the test instrument Continuity functions a Continuity measurements should only be performed on de energized objects Parallel impedances or transient currents may influence test results Testing PE terminal If phase voltage is detected on the tested PE terminal stop all measurements immediately and ensure the cause of the fault is eliminated before proceeding with any activity Notes related to measurement functions General Es indicator means that the selected measurement cannot be performed because of irregular conditions on input terminals a Insulation resistance continuity functions and earth resistance measurements can only be performed on de energized objects PASS FAIL indication is enabled when limit is set Apply appropriate limit value for evaluation of measurement results a Inthe case that only two of the three wires are connected to the electrical installation under test only voltage in
82. s period of time before any measurements are taken 55 MI 3002 amp MI3102 Measurements 5 11 Testing the PE terminal In new or adapted installations it may occur that the position of the PE conductor and the phase conductor become reversed this is a very dangerous situation This is why it is important to test for the presence of a phase voltage on the PE protection terminal This test should be performed before a mains supply voltage is applied to the instrument circuitry and before installation is used For additional information concerning PE terminal test refer to Metrel s handbook Measurements on electric installations in theory and practice How to test PE terminal Step 1 Connect test cable to the instrument Step 2 Follow the connection diagrams shown in figures 5 48 and 5 49 to test PE terminal Reversed phase and protection conductors MOST DANGEROUS SITUATION Figure 5 48 Connection of plug cable to mains outlet with reversed L and PE conductors 56 MI 3002 amp MI3102 Measurements L1 N 7 S Reversed phase protection conductors PEL3 lt MOST DANGEROUS N L2 i SITUATION Figure 5 49 Connection of universal test cable to load connection terminals with reversed L and PE conductors Step 3 Touch the PE test probe TEST key for a few seconds If PE terminal is connected to phase voltage a warning message will be disp
83. strument RS232 connector and follow the positioning diagram shown in figure 5 46 to perform illumination measurement Turn on the LUXmeter probe by pressing its ON OFF key the Green LED should light on the probe Use the Help function if necessary Figure 5 46 LUXmeter probe positioning 54 MI 3002 amp MI3102 Measurements Step 4 Check for any warnings on the display before starting the measurement If Notes everything is ok press the TEST key to start the measurement The results will appear on the display along with a PASS FAIL indication if applicable After starting the test the test will run continuously until the user stops the measurement To stop measurement press the TEST key again The last measured result will be displayed together with the PASS FAIL indication if applicable ILLUMINATION 581u auc ag d 40 Figure 5 47 Example of illumination measurement result Displayed result Illumination Refer to chapter 6 1 Saving results for information on how to save the displayed results for documentation purposes For accurate measurements make sure that the milk glass bulb is lit without any shadows cast by hand body or any other unwanted objects It is very important to know when the artificial light sources will reach full power this may take a period of time see technical data for light sources for more information and should therefore be switched on for thi
84. switch rotation Function selector switch MEM key to access memory operations HELP CAL key to access help menus CAL function can be used to compensate for the test lead resistance in low value resistance measurements Jogger keypad with cursors for navigating screen menus and TEST keys for starting tests The TEST key also acts as the PE touching electrode which detects potentially dangerous voltages appearing on the PE conductor BACKLIGHT and CONTRAST key This is used to turn the backlight on and off and for adjusting the level of the contrast The high level backlight is automatically shut off 20 seconds after the last key press function switch rotation in order to extend service life of the battery 128 x 64 dots matrix display with backlight MI 3002 amp MI3102 Instrument description 3 2 Connector panel Figure 3 2 Connector panel Legend Test connector Warning Maximum allowed voltage between test terminals and ground is 600V Maximal allowed voltage between test terminals is 550 V 3102 only In the earth resistance function test connector terminals used as follows N L2 blue test lead is used for the earth electrode E a L L1 black test lead is used for the auxiliary earth electrode H PE L3 green test lead is used for the probe S Power supply socket c E RS 232 connector d eu Protection connector cover o M USB connector CLAMP CURRENT
85. t voltage Uc Uc 1 05xlAN G 2 9 SG Uc 1 05 42 Uc 1 05 2 42 Table 5 1 Relationship between Uc and lan 32 MI 3002 amp MI3102 Measurements For additional general information concerning contact voltage measurement refer to Metrel s handbook Measurements on electric installations in theory and practice How to perform contact voltage measurement Step 1 Select RCD function with the function selector switch first Use the A V keys to select contact voltage function Uc The following menu will be displayed Figure 5 11 Contact voltage measurement menu Step 2 Set the following measuring parameters and limit values a Nominal residual current RCD type Limit contact voltage Step 3 Connect the test leads to the instrument and follow the connection diagram shown in figure 5 12 to perform contact voltage measurement Use the Help function if necessary 2 m L Figure 5 12 Connection of plug test cable or universal test cable Step 4 Check for any warnings and check the online voltage terminal monitor on the display before starting the measurement If everything is ok press the TEST key After performing the measurement the results will be displayed along with a PASS FAIL indication Figure 5 13 Example of contact voltage measurement results Displayed results Contact voltage Fault loop resista
86. tact voltage Save displayed results for documentation purposes Refer to chapter 6 7 Saving results MI 3002 and MI 3102 Notes Parameters set in this function are also transferred onto all other RCD functions RCD trip out time measurement will be performed only if the contact voltage at nominal differential current is lower than the limit set in the contact voltage setting The measurement of the contact voltage in pre test does not normally trip an RCD However the trip limit may be exceeded as a result of leakage current flowing through the PE protective conductor or a capacitive connection between L and PE conductors 5 3 8 Trip out current This test is used to determine the minimum current required to trip the RCD After the measurement has been started the test current generated by the instrument is continuously increased starting at 0 2xlan to 1 1 to 1 5xlan 2 2xlan lan 10 mA for pulsating DC residual currents until the RCD trips For additional information concerning the trip out current measurement refer to Metrel s handbook Measurements on electric installations in theory and practice How to perform trip out current measurement Step 1 Select RCD function with the function selector and use the A V keys to select the Trip out current RCD 44 function The following menu is displayed Figure 5 16 Trip out current measurement menu 36 MI 3002 amp MI3102 Measurements Step 2 St
87. the Periodic sound measurements immediately and eliminate the fault before proceeding with any activity 4 1 7 Function and parameter line Insulation Line A9 e y Figure 4 2 Function selector switch and belonging parameter line Legend 1 Main function name VE Function or sub function name Measuring parameters and limit values 4 2 Selecting measurement function subfunction The following measurements can be selected with the function selector switch Voltage and frequency Insulation resistance Low value resistance RCD testing Fault loop impedance Line impedance Phase sequence Resistance to earth MI 3102 only TRMS current MI 3102 only Illumination MI 3102 only DOCO DO OODD The function sub function name is highlighted on the display by default Sub function can be selected by using and y keys in function parameter line 20 MI 3002 amp MI3102 Instrument operation 4 3 Setting measurement parameters and limits By using lt and gt keys select the parameter limit value you want to edit By using A and v keys the selected parameter can be set Once the measurement parameters are set the settings are retained until new changes are made or the original settings are recalled 4 4 Help menu Help menus are available in all functions The Help menu contains schematic diagrams for illustrating how to properly connect the instrument to electric installation After select
88. ting the measurement If everything is ok press the TEST key The autotest sequence will then start to run as follows 1 Trip out time measurement with the following measurement parameters a Test current of lan Test current started with the positive half wave at 0 Measurement normally trips an RCD within allowed time period The following menu is displayed lmas mae J MES Figure 5 19 Step 1 RCD autotest results After re activating the RCD the autotest sequence automatically proceeds with step 2 2 Trip out time measurement with the following measurement parameters Test current of lan Test current started with the negative half wave at 180 Measurement normally trips an RCD The following menu is displayed 38 MI 3002 amp MI3102 Measurements Figure 5 20 Step 2 RCD autotest results After re activating the RCD the autotest sequence automatically proceeds with step 3 3 Trip out time measurement with the following measurement parameters Test current of 5xlan Test current started with the positive half wave at 0 Measurement normally trips an RCD within allowed time period The following menu is displayed Figure 5 21 Step 3 RCD autotest results After re activating the RCD the autotest sequence automatically proceeds with step 4 4 Trip out time measurement with the following measurement parameters Test current of 5xlan Test cur
89. ugh the insulation resistance and reactance capacitance between the other lines and PE 80 MI 3002 amp MI3102 IT supply systems How to perform first fault current measurement Step 1 Select the Insulation function with the function selector switch and use the keys to select ISFL first fault current function The following menu is displayed ISFL 1 00 8 Izcl mH Figure 4 First fault current measurement menu Step 2 Set the following limit value First fault current high limit value Step 3 Connect test cable to the instrument and to the item under test Follow the connection diagram shown in figure B 5 to perform first fault current measurement Use the Help function if necessary Figure B 5 Connection with plug commander and universal test cable Step 4 Check the displayed warnings and online voltage terminal monitor before starting measurement If OK press the TEST key After performing the measurement results appear on the display together with the PASS FAIL indication if applicable TSF L d d o 8 8 Izcl Izcz Figure B 6 Example of first fault current measurement results 81 MI 3002 amp MI3102 IT supply systems Displayed results 1 First fault current between L1 PE 2 First fault current between L2 PE Save displayed results for documentation purposes Refer to chapter 6 7 Saving results
90. will be prevented from being performed If a noise voltage higher than approx 5 V is present between the H and E or S test terminals the noise warning symbol gt will be displayed indicating that the test result may not be correct 51 MI 3002 amp MI3102 Measurements 5 9 TRMS current MI 3102 only This function enables measuring of AC currents in a wide range from 0 5 mA to 20 A using sensitive current clamp A 1018 supplied by METREL For additional information concerning TRMS current measurement refer to the METREL s handbook Measurements on electric installations in theory and practice How to perform a TRMS current measurement Step 1 Select the TRMS CURRENT function TRMS with the function selector switch The following menu is displayed Figure 5 42 TRMS current measurement menu Step 2 Set the following limit value a High limit current value Step 3 Connect the test leads to the Eurotest instrument and follow the connection diagram shown in Figure 5 43 to perform a TRMS current measurement Use the Help function if necessary Figure 5 43 Connection diagram 52 MI 3002 amp MI3102 Measurements Step 4 Check for any warnings on the display before starting the measurement If everything is ok press the TEST key After starting the test the test will run continuously until the user stops the measurement To stop measurement press the TEST key again The last measured result will be dis
91. y be performed on de energized objects Parallel impedances or transient currents may influence test results Note a If voltage between test terminals is higher than 10 V the measurement will not be performed 5 3 Testing RCDs When testing RCDs the following sub functions can be performed Contact voltage measurement Trip out time measurement Trip out current measurement RCD autotest In general the following parameters and limits be set when testing RCDs Limit contact voltage Nominal differential RCD trip out current Multiplier of nominal differential RCD trip out current RCD type Test current starting polarity DOoveo DL 5 3 1 Limit contact voltage Safety contact voltage is limited to 50 Vac for standard domestic area In special environments hospitals wet places etc contact voltages up to 25 Vac are permitted Limit contact voltage can be set in contact voltage Uc function only 5 3 2 Nominal differential trip out current Nominal differential current is the rated trip out current of an RCD The following RCD current ratings can be set 10 mA 30 mA 100 mA 300 mA 500 mA and 1000 mA 5 3 3 Multiplier of nominal residual current Selected nominal differential current can be multiplied by 75 1 2 or 5 31 MI 3002 amp MI3102 Measurements 5 3 4 RCD type and test current starting polarity The Eurotest instrument enables testing of general non delayed and selective ti
92. y checked and repaired immediately after a failure has been detected Supplementary to other protection devices an IT system normally contains insulation monitoring devices IMD or systems that sound alarms when insulation resistance or impedance drops below set threshold The threshold value usually depends on environment and the application e g Typical value for a medical installations is 55 In some countries it is not enough to trace the insulation resistance of the IT supply system to ground they require tracing of system capacitance too IEC 60364 4 41 OIEC In IT systems live parts shall be insulated from earth or connected to earth through sufficiently high impedance This connection may be made MI 3002 amp MI3102 IT supply systems either at the neutral point or at midpoint of the system or at an artificial neutral point The latter may be connected directly to earth if the resulting impedance to earth is sufficiently high at the system frequency Where no neutral point or mid point exists a line conductor may be connected to earth through high impedance L1 133 V 230 V 133 V 133 V 230 V EN N optional IMD impedance i PE Figure B 1 General IT supply system Three phase star connection optional delta connection Optional neutral line Single phase connection is also possible Various system voltages not only three phase 230 V as indicated above One
93. y21000 mA RCD 142500 mA RCD Trip out current Trip out current 14 10 mA Measurement range corresponds to EN61557 6 requirements Specified accuracies are valid for complete operating range Measuring range Resolution 1 0 2xlay 1 1xlan AC type 0 05xIan 0 2xlan 2 2xlan A type 0 05 1 Trip out current lan 30 mA Measurement range corresponds to EN61557 6 requirements Specified accuracies are valid for complete operating range Measuring range Resolution 0 2xlan 1 1xlan AC type 0 05 1 0 2xlan 1 type lan 0 05xlAN 0 1 XIAN 2 30 mA Trip out time Measuring range ms Resolution ms 0 300 Contact voltage Measuring range V Resolution V 0 9o 15 96 of reading 0 0 9 9 0 1 2 digits 10 0 99 9 0 96 15 96 of reading 89 MI 3002 amp MI3102 Reduced low voltage supply systems C 4 5 Fault loop resistance and prospective fault current Rs sub function Measuring range according to 61557 3 is 0 32 1999 Measuring range Resolution 0 00 19 99 20 0 99 9 10 of reading 5 digits 100 1999 The accuracy is valid if mains voltage is stable during the measurement Prospective fault current calculated value Measuring range A Resolution A Accuracy 0 00 19 99 20 0 99 9 Consider accuracy of fault 100 999 loop resistance 100k 9 99k 0 measurement 10 0 24

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