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

Negative sequence unbalance protectionANSI code 46function n° F45X 1 ≤ X ≤ 2Equipmentc single-phase current generatorc ammetersc adapter for ECA modulec chronometerc documentationWiringc diagram B1,B8, B9 or B10c protective relays:F451/1 F451/2F452/1 F452/2.Testc read the section entitled measurement and testingmethodc status parameter settingv select the value of the CT primary circuitsv set Ibv check the microswitches (1A or 5A) whichcorrespond to the CT secondary circuits on the ECMmodulev or check and set the microswitches on the ECAmodule.Procedurec set the protection parameters: Unbalancev select the definite curvev set Is to the desired value as a % of Ibv set T to the desired valuev disable protections (2) : O/C X, E/F X (when sum of 3 CTs is used)Testing of definite time Is set pointtTIsIc parameter settingv set T to 0.1 sv the current i to be injected varies according to the injection diagram usedand the number of CTs set in the status menu:- diagram B1: 2CT status: i = 1.732 Is- diagram B1: 3CT status: i = 3 Is- diagram B9: 2 or 3 CT status: i = 1.732 Isc testv gradually inject current i until the output relay linked with the protection inprogram logic picks up, and monitor Ii on the pocket terminalv read the i current value on the ammeterv check measurement and I TRIP (1) value on the display unit or pocket terminalv stop the injectionv press reset (1) on the Sepam 2000 to erase the messages and reset theoutput relay.Testing of time delay Tc protection parameter setting: Unbalancev set T to the desired valuec testv prepare the injection i with 1.2 times the value of Isv set the chronometer to zerov start up injection and the chronometer at the same timev Sepam's 2000 output relay stops the chronometerv read the T value 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 of testing.X = number of the protective relay.1/26 Sepam 2000 - Testing