A time delay relay which will remain energized for a period after supply removal. The output relay is energized upon application of the supply voltage. The time period set by the control knob commences when the supply is disconnected, with the output relay de-energizing at the end of this period. To give correct operation the supply must be connected for a minimum period of 70 ms for the 20 s timers and 650 ms for the 10 m timers. The minimum recovery time is 100 ms i.e. for correct operation the relay must remain de-energized for this time before the supply is re-connected.
Timing circuits feature transient suppression circuitry to limit mains interference. The output relay contacts are isolated from the input supply. Isolation voltage 1500Vac.
