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

Inhibition of outputsand test parameterizationnormalKP6KP6 and KP9protectiontesting and trippinginhibitedDepending on the settings of the KP6 and KP9 parameters, the protection is in oneof the following 4 operating modes:c normal,c tripping inhibited,c protection testing and tripping inhibited,c protection testing and tripping active.KP9KP9trippinginhibitionKP6KP6 and KP9KP9KP6 and KP9KP9protectiontesting and trippingactiveInhibition of outputsIt is useful to be able to inhibit differential and restricted earth fault protectionactions, in particular to run tests while the electrical distribution system is operatingnormally.Parameter KP9 is used for inhibition, which consists of disabling the switching ofthe tripping outputs.The indication outputs of the differential and restricted earth fault protectionsremain valid, allowing protection operation to be checked.KP6 = 0 KP9 = 0 normal mode outputs: all operativeIndicator offMessage : ------------KP9 = 1 tripping inhibited outputs inoperative according to chart"test" indicator onmessage: INHIBIT.outputs inoperative indication outputs operativeSepam D21, D31 O1, O2, O11, O12, O13, O22 (differential)(1)D31 only O21, O31 (1) O23 (restricted earth fault winding 2)O14, O24, O34 (1) O33 (restricted earth fault winding 3) (1)Sepam D22 O1, O2, O12, O13 O14 (differential or restricted earth fault)chart of output status in tripping onhibited modeTest modeThe test mode is designed to simply current injection for the differential protectiontest.The test mode is obtained by using the KP6 parameter.The changeover to test mode automatically parameterizes the differential protection.c vector groups equal to 0c Un, Un' and Un" values such that Un.In = Un'.In' = Un".In".It disables switching of the tripping outputs. Upon the return to normal mode(KP9 = 0), the initial parameter settings are recovered and the outputs becomeactive again.Changeover from normal mode to test mode:KP6 0 → 1 protection test mode and outputs inoperative according to chart(whatever the tripping inhibited "Test" indicator blinkingvalue of KP9)Message: TEST COUPL.Test mode:KP9 0 → 1 → 0 protection test mode and Outputs: all operativeou tripping active "Test" indicator blinkingKP9 1 → 0Message: TEST COUPL.(KP6 = 1)Return to normal mode:KP6 1 → 0 No inhibition Outputs: all operative(KP9 = 0)Indicator offMessage: ------------resetKP6 1 → 0 inhibition outputs inoperative according to chart(KP9 = 1)Indicator offMessage : INHIBITresetD21 - D22 - D31 - Installation - Use - Commissioning4/3