Multi-shot auto-reclose and check synchronising
Contents
1. OOOO Relay 4 Ug o a Relay 32 5 99 0000 1 aga _ Q 9 3 3 S g E gosssssessssessM L nim KAVR 100 130 Hardware Description The relay is housed in a Midos size 4 case suitable for either rack or panel mounting as shown in Figure 6 A highly integrated 16 bit micro controller uses digital signal processing techniques to analyse power system quantities and implement scheme logic The micro controller performs all of the major software functions such as input signal processing scheme logic output relay control and handling of the operator interface The relay has 2 analogue inputs and 8 opto isolated digital inputs The internal VTs are used to isolate step down and condition the input from the line VTs Their output signals are then converted into digital data for further processing The front plate contains a 2 x 16 character alphanumeric liquid crystal display LCD and 4 pushbuttons to provide local access to the relay s menu There are also 3 light emitting diodes LED for visual indication of relay s status Standard Midos terminal blocks are located at the rear of the relay providing connections for2. x a o Lc e ZZ 121 T 0 NOWWOO LAdNI 21901 amp 654 E HLAVY 35 2 Dr e P gt Hd 8 1 4 54 I 7 We vi 4 48142 cman ev 7 Hd V 1O3Wd LINI en cie 2 QC ir ye 560 18 lt lt E 2 ONIddlll Hd 1 NAYNI i 6 on HOLIMS XNY 8D 19 ESL Ze 5 4 LIGIHNI se Pe HLAVA 35 2 O 1 YOSIG 82 13 Q LIGIHNI 7 m 1 CNN Z 1D NVW 304 DNAS 2 vv 24 JDIAYAS JO 1010 1003201 AV for or 7 Dr 8 38010 2 9 4 ve SS3YDOUd NI te 23 o aniva Avin lt 4 iz of argv 3SVHd O X 8 D n m Ne AVIS lt 9 vum S 9 FUN x el x Y 2 av 5 4 Technical Data Phase angle settings e Check synchronism Relay ratings 5 to 90 e System synchronism Inputs AC voltage Vn nominal 63 5 110V Operating range 0 to 327V Maximum withstand 375V Time settings Auxiliary voltage Vx 24 125V or A8 250V de Frequency 50 60Hz Frequency range A6Hz to 65Hz Output Field voltage 48 de current limit 60mA Burdens AC voltage 0 02VA at 110V phase neutral Auxiliary voltage The burden on the auxiliary supply depends upon the number of output relays and control inp
3. O L O00L TNA E Type KAVR 100 130 Multi shot auto reclose and check synchronising relay KAVR 100 and 130 are multi shot auto reclose relays with integral check synchronising for application to feeders switched by a single circuit breaker They are intended for use on transmission sub transmission and distribution systems As a part of the K range of relays the KAVR can be integrated into an overall protection and control system by utilising its integral serial communications facility Features Number of reclosures selectable between 1 and 4 Optional single phase reclosure on the first shot Integral synchronism check function for auto reclose and manual circuit breaker closure Selectable undervoltage blocking and differential voltage blocking features Maintenance alarm and lockout Independently adjustable timers with wide setting ranges Flexible operating logic options via software function links Measurement of line and busbar voltage system frequency and phase angle slip frequency Remote communications via K Bus Integral event recorder accessible from remote PC Comprehensive self checking and alarms Models available KAVR 100 3 phase tripping only e KAVR 130 Single and 3 phase tripping Application The KAVR 100 provides 1 2 3 or 4 shot reclosure of a circuit breaker following a fault on an overhead line The first shot can be selected to be either high speed or delay
4. 1 0kV peak across terminals of the same circuit Fast transient disturbance IEC 60255 22 4 1992 Class Ill 2kV 5kHz applied directly to all inputs IEC 60801 4 1988 Level 4 2 5kHz applied directly to auxiliary voltage watchdog and trip capacitor 2 5kHz via capacitor clamp to all inputs e Electrostatic discharge IEC 60255 22 2 1989 Class III 8kV discharge in air with cover in place IEC 60801 2 1991 Level 2 point contact discharge with cover removed e DC supply interruption IEC 60255 11 1979 The unit will withstand a 10ms interruption in the auxiliary supply under normal operating conditions without de energising e ripple on DC supply IEC 60255 11 1979 The unit will withstand 12 ac ripple on the dc supply e Compliance CE 89 336 EEC Compliance with the EuropeanCommission Directive on EMC is claimed via the technical Construction File route EN 50081 2 1994 EN 50082 2 1995 Generic Standards were used to establish conformity e Product Safety CE 2 23 Compliance with the European Commission Low Voltage Directive 61010 1 1993 A2 1995 EN60950 1992 A3 1995 Compliance is demonstrated by reference to generic safety standards Atmospheric environment Temperature IEC 60255 6 1988 Storage and transit 25 C to 70 C Operating 25 C to 55 C IEC 60068 2 1 1990 Cold IEC 60068 2 2 1974 Dry heat e Humidity IEC
5. 126 amp es SO DA 1 0c a f oc lt SE a HAVI ISVO OOTHANDI Wu V3ONVN3INIVIW lt TE 3 t 8t o ez LT a gz NOLDALO Yd ISNIDDOTE lt vy state 48 m 1c FOES 4o1no 1no Do1uv lt OF lt oz _ C 7 T f s N lco asop lt 9 o lt ve UA u 2 8 d c I SsauoOud lt ZE c C e 5 L cce AN EU 6 Tz NOLLV 1Od 3SvHd XA x a Xlddns N AHENGHAVHH lt 9 x oe 2 TRE T x v gt av KAVR 100 130 O 1 001 Typical application diagram KAVR130 Figure 5 KINO TWOIdAL JAY SNOLLO3NNOO 72 3ION VIELE Nid n SNOT j 0 340338 NWN STVNIW331 LYOHS 9 2 5 jk z NOWWOO 1fdNI 21901 SR 05 8 LILON 42 35010 82 1YNNYW avais 912 1 1353 res NON 32018 TWNIWYAL WO 32018 me at 14Od SNOILYOINNWWOD SNIA INSSI SY AIV ies ssi 8 amp 7 4 Q3OWVHO ONIS 2 SE i 92 252 is 192 TX u Fee e Hd D 10
6. 12V On voltage gt 35V Off voltage Contacts Output relays Eight single make Contact ratings Make and carry for 0 2s 30A Carry continuously 5A Break 50W resistive 25W inductive L R 0 04s at 300V max Durability Loaded contact 10 000 operations minimum Unloaded contact 1000 000 operations minimum Communications port K Bus Language Courier Transmission mode Synchronous Signal levels RS485 Message format HDLC Data rate 64 kbits s Connection Multidrop 32 units Cable type Screened twisted pair of wires Cable length 1000m maximum Connector Screw terminals M4 Isolation 2kV rms for 1 minute High voltage withstand Dielectric withstand IEC 60255 5 1977 2kV rms for 1 minute between alll case terminals except terminal 1 connected together and the case earth terminal 1 2kV rms for 1 minute between terminals of independent circuits including contact circuits 1 5kV rms for 1 minute across open contacts of output relays 0 to 8 1kV rms for 1 minute across the open contacts of the watchdog relay High voltage impulse IEC 60255 5 1977 Three positive and three negative impulses of 5kV peak 1 2 50ys 0 5 between all terminals and all terminals except terminal 1 and case earth terminal 1 Electrical environment High frequency disturbance IEC 60255 22 1 1988 Class Ill 2 5kV peak between independent circuits 2 5kV peak between independent circuits and case earth
7. 60068 2 3 1969 56 days at 93 RH and 40 C e Enclosure protection IEC 60529 1989 IP50 dust protected Mechanical environment Vibration IEC 60255 21 1 1988 Response Class 1 Endurance Class 1 e Shock and Bump IEC 60255 21 1988 2 1988 Shock Response Class 1 Shock Withstand Class 1 Bump Class 1 Seismic IEC255 21 3 1993 Class 1 Case The relay is housed in a size 4 Midos case as shown in Figure 6 Push button 4 holes 4 dimensions projection 10 max ol cut out Flush mounting fixing details 212 Reset Flush mounting 25 Figure 6 Case outlines size 4 Additional Information KAVR KAVS KVIR service manual R8505 e KAVRI100 scheme description R6523 e KAVR130 scheme description R6539 e logic diagram 08 KAVR100 01 11 sheets e KAVR130 logic diagram 08 KAVR130 01 12 sheets KAVR130 service manual R8523 Glossary Information required with order Relay type KAVR TIILO JE dE Models available Three phase tripping Single and three phase tripping Configuration Standard Case size Size 4 MiDOS flush mounting Auxiliary voltage 24 125V 48 250 Transformer ratings Vn 57 7 120V In OA Language 7 99
8. all input and output circuits such as dc supply ac voltage and a K Bus communications port Password protection User Interface Front panel user interface The features of the relay can be accessed through a menu driven system The menu is arranged in the form of a table into each column of which related items menu cells are grouped The user can move around the menu by means of the keys on the frontplate This can be done with the cover in place but any change to the settings requires the cover to be removed Remote access user interface The menu table can also be accessed via the remote communications facility This allows all of the menu cells in a column to be displayed simultaneously on the screen of a PC Changes to the menu cell can be made from the PC keyboard Relay interconnection The relays are interconnected via a shielded twisted wire pair known as K Bus Up to 32 relays may be connected in parallel across the bus The K Bus is connected through a protocol converter known as KITZ either directly or via a modem to the RS 232 port of the PC The KITZ provides signals over the bus which are RS 485 based and transmits at64 kbits s The K Bus connection is shown in Figure 2 This system allows up to 32 relays to be accessed through one RS 232 communications port pictorial representation of this is shown in Figure 3 Password protection is provided on settings which alter the configuration of t
9. d secure Typical application diagram KAVR100 Figure 4 Nid ec KINO TWOIdAL Sav Z ALON WNIWRELLONOT o VIN SIYNIWHALIHOHS 9 1 I2HNNOOSIa 2 9 340 59 jl LNdNIDID01 T e 2 SDIVW SINT 5 8 35VLTOAG HH 8 DIA TALON a e 4 Sik avaus HSV ISVO IVHORLNI HLM zi Wv DoTa8 WO 5 22 TS S DO I8 IVNIINH3L INGON 51 NOLLD3LOMd NON gt NOS m nos Jk T zu 2 Ik N 95 95 ss 4HOd SNOLLYDINNWWOD SNE i m 1 e ly vs l gt c vs ZG 1 CHOWuvHO SNS pd ae Ss c Sr i zz 46 t c NOLDJNNOO s D NOWINCO INdNIDID07 e sf es ES zs i i SYO 44 8t i NOLDALOdd NIV SIA 0 0 P 3sopoLamnivago lt NOUDALOdd ISNI 229 ey 8v e OK x ES fs T D ce P UMEN MS AoNan gud lrinv4ss3ox lt 6 n De
10. ed three phase reclosure The KAVR 130 is specifically designed for transmission and sub transmission lines where there is a need for single phase auto reclosure In addition to the cycles available on the KAVR 100 it gives the option of high speed single phase auto reclose for the first shot The check synchronising function ensures that the two parts of the system are sufficiently in synchronism before being connected together This function can also be used with manual switching and is operable even when the auto reclose function is out of service Functions Auto reclose The auto reclose cycle is initiated by the operation of the associated protective relay Flexible scheme logic is provided to allow the relay to be used for a wide range of applications The KAVR 130 can be set so that a single phase fault initiates a single phase auto reclose cycle If the fault evolves onto all three phases before the relay s dead time has elapsed a three phase trip will result An integral maintenance alarm counts the number of operations of the circuit breaker It provides an alarm and a subsequent lockout if the preset thresholds are exceeded Additional counters indicate the number of relosures which may be attempted before lockout occurs The KAVR 130 has separate counters for each phase and will also register the total number of single phase and three phase reclosures attempted Check synchronising The relay check
11. he relay any accidental change to which could seriously affect the ability of the relay to perform its intended function ie enable disable settings protection function characteristic selection scheme logic settings and system VT ratios Software is available with each KITZ to provide access to the relay to read and change settings Additional software entitled Protection Access Software amp Toolkit which provides access to the event recorder together with other additional functions is also available Each relay is directly addressable over the bus to allow communication with the PC It should be noted that protection tripping and blocking signals are not routed via the K Bus Separate conventional cabling is used for these functions Where appropriate the isolated 48V dc supply available on each relay is used to energize its opto isolators via external contacts Communications protocol The communications protocol used with K Series relays is designated Courier The Courier language has been developed specifically for the purpose of developing generic PC programs that will without modification communicate with any device using the Courier language In the Courier system all information resides in the relay Each time communication is established with the relay the requested information is loaded to the PC The protocol includes extensive error checking routines to ensure that the system remains reliable an
12. ng change or operation of a control function is stored in the relay with a resolution of 115 Alarms are also stored as events Test features A number of features are provided to enable the relay to be thoroughly tested during commissioning routine maintenance and fault finding operations The measurement functions allow the analogue input and its associate wiring to be checked The on off states of the digital inputs and relay outputs can be displayed Power on diagnostics and self monitoring Power on diagnostic tests are carried out by the relay when it is energised These tests include checks on the timer microprocessor memory and the analogue input circuity Continuous self monitoring in the form of watchdog circuity memory checks and analogue input module tests is also performed In the event of a failure the relay will either lock out or attempt a recovery depending on the type of failure detected External inputs Sai Break relay coil tw Function link bs Output 0 9 Make Figure 1 Example of ladder logic 8 E E 5 gt 12 16 baUo 8 2 d cL e v B o E 5 1 9 2 5 S 2 p ag E 0 olla 923 a T 5 T RS232 Relay 3 5 95
13. s that the two parts of the system are in synchronism by measuring the angle and the slip frequency between the line voltage and the bus voltage Auto reclose is blocked if these values exceed the phase angle and slip frequency settings Manual closure is blocked if these values exceed the system angle and system slip settings Selectable undervoltage and differential voltage measurements are available to block closure if the line and bus voltages are not compatible To allow the circuit breaker to be closed onto an uncharged line live line dead bus dead line dead bus and dead line live bus detectors are included These allow reclosure when the voltage on the line and or the bus VT is below a preset value Scheme logic The KAVR uses ladder logic Figure 1 to implement the scheme It presents this in the form of contacts coils counters and timers that are implemented in the software In operation the left side of the ladder is analogous fo a positive supply rail with the right side being negative The program then acts as an imaginary current flowing left to right acting upon the components on the rungs of the ladder as appropriate Changes to the scheme can be made by the user by opening or closing software function links to match it to a particular application Full details of the scheme logic used are included in the relevant logic diagram See additional information Inputs and outputs KAVR has 8 opto i
14. solated inputs which may be assigned by the user to any of the available scheme inputs listed in the relevant scheme description There are 8 programmable outputs each comprising a relay with 1 normally open contact which may also be assigned by the user A dedicated watchdog contact with 1 normally open and 1 normally closed contact is also available Typical application diagrams Figures 4 and 5 show the input and output functions assigned as factory default settings User controls User controls are provided via the user interface to switch auto reclosing in and out of service reset the relay from lockout reset Successful AR CB Failed to close indication In addition on the KAVR 130 they may be used to select single phase three phase or single three phase reclosing Ancillary Functions Measurement The relay can display the magnitude of the line and bus voltages line voltage frequency and slip frequency The measurements can be selected by the user to be displayed as either primary or secondary quantities Primary display quantities are based on the VT ratios set in the relay These quantities can provide a default setting on the LCD situated on the relay frontplate Event records Fifty events are stored in a non volatile buffer Software is available to enable the events to be downloaded to a PC Any change of state of a control input or output relay local setti
15. uts energised No of Typical control burden inputs 0 2 5 6 0 2 4 0 8 0 8 5 5 12W 0 6 0 12VA 2 6 0 14VA 8 13 23VA 5 to 90 KAVR100 Dead time 1 Dead time 2 Dead time 3 Dead time 4 Reclaim time Slip frequency settings Check synchronism 0 001Hz to 2 0Hz System synchronism 0 001Hz to 2 0Hz 0 015 to 300s 1 00s to 300s 1 00s to 99995 1 00s to 9999s 1 00s to 600s Check synchronism delay 0 15 to 99s System synchronism delay 0 1s to 99s Check synchronism window 0 01s to 600s Auto reclose inhibit after manual close Close pulse KAVR130 Dead time 1 Dead time 2 Dead time 3 Dead time 4 0 01s to 300s 0 01s to 10s 0 01s to 300s 1 00s to 9999s 1 00s to 9999s 1 00s to 99995 Single phase dead time 1 Reclaim time 0 01s to 5s 1 00s to 600s Check synchronism delay 0 10s to 99s System synchronism delay 0 10s to 99s Check synchronism window 0 01s to 9999s Auto reclose inhibit after manual close Close pulse 0 01s to 600s 0 01s to 5s Voltage settings 22V to 132V 0 5V to 22V Line bus dead voltage 5V to line bus live voltage Undervoltage Differential voltage Line bus live voltage Line bus dead voltage to 132V Transformer ratios Voltage transformers 1 1 to 9999 1 Digital inputs Opto isolated inputs Eight energised from 48V field voltage Nominal rating 50V dc lt
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