Woodward SEG HighPROTEC MRA4, Device Manual

Page: 345 / 510

CLPU - Supervision Module Cold Load Pickup
Commissioning of the Cold Load Pickup Module
Object to be tested
Testing the the module Cold Load Pickup according to the parameterized operating mode:
•
I< (No current)
•
LS POS (Circuit Breaker Position)
•
I< (No current) and CB POS (Position of the Circuit Breaker)
•
I< (No current) or CB POS (Position of the Circuit Breaker)
Necessary means
•
Three-phase current source (If the Enable-Mode depends on current)
•
May be: ampere meters (If the Enable-Mode depends on current)
•
Timer
Test Example for Mode CB POS (Circuit Breaker Position)
Mode I<: In order to test the tripping delay start the timer and feed with an
abrupt change current that is distinct less than the I<-threshold. Measure
the tripping delay. In order to measure the fallback ratio feed with an abrupt
change a current that is distinct above the I<-threshold.
Mode I< and CB POS: Combine the abrupt change (switching ON and OFF
of the current) with the manual switching ON and OFF of the circuit breaker.
Mode I< or CB POS: Initially carry out the test with an abrupt 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
ON and OFF the Circuit Breaker.
•
The Circuit 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.E
FFECTIVE
“=1.
•
The Status Display of the device shows the signal „CLPU.I<“=1.
Testing the tripping delay and the resetting ratio
•
Switch the circuit breaker manually ON and start the timer simultaneously.
•
After the the t-Release Delay timer has expired the signal „CPLU.
EFFECTIVE
“=0 has to become untrue.
•
Write down the measured time.
•
Switch OFF the Circuit Breaker manually and start the timer simultaneously.
•
After the t-Pickup Delay timer has expired the signal „CPLU.E
FFECTIVE
“=1 has to become true..
•
Write down the measured time.
EN MRA4 04/09 Page 345