Pick-Up and Drop-Off voltage to be checked for all Lockout
relays.
. Before testing technical data of devices to
be checked.
. Testing to be performed by voltage
injection on coil terminals. Connect DC variable voltage to trip coil
and increase voltage until relay
trip. Note this voltage. Check operational of flag indicator and reset the lockout relay.
. Switch OFF the voltage and reset the lockout
relay.
. Connect the NO contact of Lockout relay to
stop the timer.
. Again apply the voltage and note the time
of operation.
. Operating time to be tested with the timer
for rated voltage of coil.
. Check operation of flag indicator and reset
the trip lockout of relay.
. Function check by simulation operation of
all protection as per approved drawing.
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