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

Phase overcurrent protectionANSI Code 50-51function n° F01X for phase I overcurrent protection 1 ≤ X ≤ 6F02Y for phase I' overcurrent protection 1 ≤ Y ≤ 2Equipmentc single-phase or three-phase current generatorc ammetersc adapter for ECA modulec chronometerc documentationInjection unit wiringc diagram B1 or B2 or B8c protection relays:F011/1, F011/2 F021/1, F021/2F012/1, F012/2 F022/1, F022/2F013/1, F013/2F014/1, F014/2F015/1, F015/2F016/1, F016/2Procedurec protection parameter setting: O/C X or frame leakv select the curvev set Is to the desired valuev set T to the desired valuev disable the following protections (2) : unbalance; the other O/C protections, E/F(if CT sum is used)Checking of definite time Is set pointtTTestIsIc read the section entitled measurement and testingmethodThis protection is three-phase and may be tested oneach phase individually with single-phase current.c status parameter settingv select the value of the CT primary circuitsv check the microswitches (1A or 5A) whichcorrespond to the CT secondary circuitsv or check and set the microswitches on the ECAmodule.c protection parameter settingv select the definite curvev set T to 0.05 s (for immediate pick-up of the output relay)c testv gradually inject the current or currents until the output relay linked to theprotection in program logic picks upv read the Is current value on the ammeterv check the meter and the I TRIP (1) values on the display unit or pocket terminalv stop the injectionv press reset (1) on the Sepam to erase the messages and reset the output relayChecking of the definite time set point and time delayc protection parameter setting: O/C Xv set T to the desired valuev prepare the injection with twice the value of Isv set the chronometer to zeroc testv start up injection and the chronometer at the same timev Sepam's output relay stops the chronometerv read the value T measured by the chronometer(1)this function may only be activated if your program logichas been customized.(2)remember to reactivate the protections at the end oftesting.X = number of the protective relay.1/4 Sepam 2000 - Testing