Sepam - HV/MV Protection and control units (ENG) - Trinet

Phase-to-phase overvoltageANSI code 59function n° F28X for U32 overvoltageF30X for U21 overvoltage1 i X i 2F29Y for U32' overvoltageF31Y for U21' overvoltage1 i Y i 2OperationThis protection is single-phase:c it picks up when the phase-to-phase voltageis greater than the set point Us.c the protection includes a definite time delay,c the set point and time delay are independent foreach single-phase function,c if there is only one sensor, the F30X and F31Yprotections operate with system overvoltage(phase-to-phase voltage setting):v based on a single phase-to-neutral voltage signal,if the phase VT ratio number parameter is V,v based on a single phase-to-phase voltage signal,if the phase VT ratio number parameter is 1U.Block diagramU32 ou U32’U21 ou U21’U > UsCommissioning, settingT0F28X/2 or F29Y/2F30X/2 or F31Y/2F28X/1 or F29Y/1F30X/1 or F31Y/1Check:c the connections,c the positions of the microswitches SW associatedwith the voltage inputs,c the general parameters in the status menustatus V 1U 3Ufunction overvoltagen°F28, F29 U32, U32’(1) (1)cF30, F31 U21, U21’ c c c(1)it is impossible to set the protection, the protection isdisabled and the corresponding outputs are set to zero.Set the following:c Us set point: Us is set in rms, volts or kilovolts.The 999 kV setting disables the protection:all the outputs are set to zero.c T time delay.SensorsThis protection is related to the voltages of the VTsconnected to the following connector:U32, U21 voltagesSepamconnectorS36* 4A (1)S26* 3A(1)3A connector for S36*TR and S36TS models.U32’, U21’ voltagesSepamS36*TRS36TSCharacteristicsUs set pointsetting5%Un to 150%Unaccuracy (1) ±1%resolution1 V or 1 digitdrop out/pick-up ratio 97% ±1%T time delaysettingaccuracy (1)resolutioncharacteristic timesinstantaneous output response timetime delayed tripping timememory timefault recognition timereset timeconnector4A4AIf there is only one sensor (phase-to-neutralor phase-to-phase voltage), the voltage signalis connected to terminals 4 and 5 of the connector,whatever the phase.50 ms to 655 s±2%, or 35 ms10 ms or 1 digit< 60 msT< 25 ms< 40 ms< 45 msoutputs available for program logicinstantaneous F28X/1 1 i X i 2 F29Y/1 1 i Y i 2F30X/1F31Y/1time delayed F28X/2 F29Y/2F30X/2F31Y/2remote reading, remote setting** (2)function code F28, F2928h et 29hidentification number X, Y (3)parameters Us set point unit: V(order of parameters) T time delay unit: 10 x msfunction code F30, F3130h and 31hidentification number X, Y (3)parameters Us set point unit: V(order of parameters) T time delay unit: 10 x ms(1)in reference conditions (IEC 60255-6).(2)the data formats are defined in the manuals which describe each communication protocol.(3)the number of protection functions depends on the type of Sepam 2000.* S35, S25 for earlier versions.** function available as of version 9802 SFT2800.2/44 Protection functions