• input signal SYNC is true, which typically indicates that power systems on thetwo sides of the circuit breaker are in synchronism• and that input signal CBREADY is true, typically indicating that circuitbreaker springs are charged.If a circuit breaker close command is given successfully at the end of the deadtime, a reclaim time starts. If the circuit breaker does not trip again within reclaimtime, the auto recloser indicates a successful reclosing and resets into "ready"status. If the protection trips again during the reclaim time, the sequence advancesto the next shot. If all reclosing attempts have been made and the circuit breakerdoes not remain closed, the auto recloser indicates an unsuccessful reclosing. Eachtime a breaker close command is given, a shot counter is incremented by one.Operation Off and On GUID-D868C9CF-CDB1-48AA-8B31-60C447FBD1D3 v1The auto recloser can be switched Off or On with a setting or by external controlinputs. With the setting Operation = On, the auto recloser is activated and with thesetting Operation = Off it is deactivated. With the settings Operation = On andExternalCtrl = On, the activation and deactivation is made by signal pulses to theON and OFF inputs, for example, from a control system or by a control switch.If the input conditions CBCLOSED and CBREADY, from the circuit breaker, arenot fulfilled while switching the auto recloser on, the auto recloser changes into“inactive” status and the output SETON is activated (high). The auto recloser is notready for auto reclosing. If, however, the circuit breaker is closed and ready whenswitching the auto recloser on, the output READY is activated and the function isprepared to start the auto reclosing cycle. The circuit breaker must have beenclosed for at least the set value for setting tCBClosedMin before a start is accepted.The logic for Off or On operation is shown in Figure 152.1MRK 505 394-UEN A Section 12ControlLine differential protection RED650 2.2 IEC 329Technical manual
