Phase Monitoring Relays
Functions Diagram
A:On Delay(Power On)
When the input voltage U is applied, timing delay t begins,Relay con-tacts R change state after time delay is complete.Contacts R return to theirshelfstatewheninputvoltageU is removed.Trigger switch is not used in this function.
B:Interval (Power On)
When input voltage U is applied,relaycontacts Rchange state immediately and timing cycle begins. When timedelayiscomplete,contactsreturnto shelf state. When input voltage U isremoved,contacts will also return to their shelfstate. Trigger switch is not used in this function.
C:Repeat Cycle(Starting Off)
When input voltage U is applied, time delay t begins.When time delay tis complete, relay contacts Rcharnge state for time delay t. This cycle will repeat until input voltage U is removed. Trigger switch is not used
in this function.
D:Repeat Cycle(Starting On)
When input voltage U is applied, relay contacts R change state imme-diately and time delay t begins. When time delay tis complete,contacts return to their shelf state for time delayt.Thiscyclewillrepeatuntilinput voltage U is removed. Trigger switch is not used in this function.
E:Off Delay(S Break)
Input voltage U must be applied continuously. When trigger switch S is clo-sed,relay contacts R change state. WWhen trigger switch S is opened, delay t bogins. When delay tis complete.contactsRreturntotheirshelfstate. If trigger switch Sis closed before time delay t is complete, then time is reset. When trigger switch Sis opened, the delay begins again, and relay contacts Rremain in their energizedstate.If input voltage U is removed. relay contacts R return to their shelf state.
F:Single Shot
Upon application of input voltage U,the relay is ready to accept trigger signal S.Upon application of the trigger signal S,the relay contacts R transfer and the preset time t begins. During time-out, the trigger signal Sis ignored. The relay resets by applying the t