EDR-5000 IM02602007E
Commissioning of the Cold Load Pickup Module
Object to be tested:
Testing the
Cold Load Pickup
module according to the configured operating mode:
•I< (No current);
•Bkr state (Breaker position);
•I< (No Current) and Bkr state (Breaker position); and
•I< (No Current) or Bkr state (Breaker position).
Necessary means:
•Three-phase current source (if the Enable Mode depends on current);
•Ampere meters (may be needed if the Enable Mode depends on current); and
•Timer.
Test Example for Mode Bkr State (Breaker Position)
Mode I<: In order to test the tripping delay, start the timer then feed with an abruptly
changing current that is distinctly less than the I<-threshold. Measure the tripping
delay. In order to measure the drop-out ratio, feed an abruptly changing current that is
distinctly above the I<-threshold.
Mode I< and Bkr state: Combine the abruptly changing current(switching the current
ON and OFF) with the manual switching ON and OFF of the breaker.
Mode I< or Bkr state: Initially carry out the test with an abruptly changing current that
is switched ON and OFF (above and below the I<-threshold). Measure the tripping
times. Finally, carry out the test by manually switching the breaker ON and OFF.
•The breaker has to be in the OFF position. There must not be any load current.
•The Status Display of the device shows the signal "CLPU.ENABLED“=1.
•The Status Display of the device shows the signal ”CLPU.I<“=1.
Testing the tripping delay and the resetting ratio:
•Manually switch the breaker ON and simultaneously start the timer.
•After the the »
t Max Block (Release Delay)«
timer has expired, the signal "CPLU.Enabled “=0 has to be false.
•Write down the measured time.
•Manually switch the breaker OFF and simultaneously start the timer.
•After the
»t load Off«
timer has expired, the signal ”CPLU.ENABLED “=1 has to become true.
•Write down the measured time.
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