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

ApplicationThis function may be used to control one, two or threecapacitor banks. It is linked to the capacitor feedercircuit breaker. It may be set to automatic or manualcontrol mode:c on location via the pocket terminal,c remotely:v via logic inputs,v by remote control.Manual controlThe opening / closing of the capacitor switchesis controlled individually:c on location (with pocket terminal),c remotely:v by remote control.Automatic control is inhibited.After each tripping operation, the T31, T32 and T33time delays prohibit all closing. This locking outensures correct discharging of the capacitors priorto re-energizing.Automatic controlThe opening / closing of the capacitor switchesis controlled via a varmeter-regulation automationsystem.Manual control is inhibited.After each tripping operation, the T31, T32 and T33time delays prohibit all closing. This locking outensures correct discharging of the capacitors beforere-energizing.OperationCapacitor control is interlocked with control of the capacitor feeder circuit breaker.Intentional opening of the capacitor feeder circuit breakerIt causes staggered opening of the capacitor switches beforehand to preventbreaking of capacitive current by the circuit breaker.T21T22T23T24capacitor 1 openingcapacitor 2 openingcapacitor 3 openingcircuit breaker openingOpening by capacitor feeder circuit breaker protectionThe protections installed on the capacitor feeder trigger tripping of the circuitbreaker. The opening of the circuit breaker, via interlocking, triggers thesimultaneous opening of the capacitor switches. The switch opening order is onlysent on the condition hat the capacitor feeder circuit breaker is open.Opening of a capacitor switch by unbalancced protectionThe unbalance protection triggers the opening of the capacitor.Closing of the capacitor feeder circuit breakerIn all cases, the circuit breaker closes with all the capacitor switches open. If openingis carried out by the overcurrent or earth fault protection, it is necessary to unlockclosing by pressing the Sepam 2000 Reset button.Closing of a capacitor switchThe capacitor unbalance protection must be of the latched type. If a capacitor switchhas been opened by the unbalance protection, the unbalance relay must beunlocked locally.CommissioningManual control / automaticWhen the device is energized for the first time, capacitor control is in automaticmode by default. Manual / automatic mode may be chosen in three ways:c on location (with pocket terminal):v KP60 manual,v KP61 automatic.c remotely via logic inputs:v I34 manual,v I35 automatic.c remotely by remote control:v KTC 60 manual,v KTC 61 automatic.The orders may be of the impulse or latched type. If a power failure occurs.Only the last order transmitted is acknowledged and stored.Choice of the number of capacitorsWhen the device is energized for the first time, the choice is 3 capacitors bydefault. The choice of one, two or three capacitors is made on location(with pocket terminal);KP36 = 0 and KP37 = 0 3 capacitorsKP36 = 0 and KP37 = 1 2 capacitorsKP36 = 1 and KP37 = 1 1 capacitorControl and monitoring functions1/41