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

Tripping currentsOperationThis function gives the rms value of currentsat the prospective tripping time:c TRIP1: phase 1 current,c TRIP2: phase 2 current,c TRIP3: phase 3 current,c TRIP0: residual current.It is based on measurement of the fundamentalcomponent.ITRIP 1Characteristicsmeasurement range (2) phase current 0.015 In to 24 In (1)accuracydisplay unit and pocketterminal formatresolutionunitresidual current 0.015 to 10 Ino (1)±5% or ±1 digit3 significant digits0.1 AA or kA(1)In, Ino rated current set in the status menu.(2)the display unit indicates > when the current is greater than the measurement range.SensorsK855T0Readout30 msThis measurement is defined as the maximum rms valuemeasured during an interval of 30 ms following activationof the K855 coil.The measurements may be accessed via:c the display unit by pressing the A key,c the pocket terminal, metering menu,tripping current heading,c the communication link.tThis measurement is related to the currents in thecircuits that are connected to following connectors:Phase currentsensorCTCSPResidual currentsensorCTCSHCT + CSH30CSPconnector2B2L1, 2L2, 2L3connector2B2A2A2L1, 2L2, 2L3Resetting to zero:c press the clear key on the display unit when a TRIPvalue is displayed,c press the clear key on the pocket terminalwhen a TRIP value is displayed,c the communication link,c via program logic coil K856.The value is saved in the event of a powersupply failure.1/4 Metering functions