EMR-5000
IM02602012E
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Testing the threshold values
(Example, Threshold 0.3 Qn)
Feed rated voltage and 0.5 times rated current (90 degree phase shift) to the measuring inputs of the relay (PF=0).
The measured values for the active power „Q“ must show a positive algebraic sign.
Set the pickup threshold (e.g.: 0.3 Qn).
In order to test the pickup thresholds, feed 0.5 times rated current to the measuring inputs of the relay. Decrease
the current slowly until the relay picks up. Ensure that the angle between current and voltage remains constant.
Compare the measured pickup value to the configured value.
Testing the tripping delay (Example, Threshold 0.3 Qn)
Feed rated voltage and 0.5 times rated current (90 degree phase shift) to the measuring inputs of the relay (PF=0).
The measured values for the active power „Q“ must show a positive algebraic sign.
Set the pickup threshold (e.g.: 0.3 Qn).
In order to test the tripping delay, feed 0.5 times rated current to the measuring inputs of the relay. Decrease the
current with an abrupt change to 0.2 In. Ensure that the angle between current and voltage remains constant.
Measure the tripping delay at the output of the relay.
Successful test result:
The measured total tripping delays or individual tripping delays, threshold values, and dropout ratios correspond with
those values specified in the adjustment list. Permissible deviations/tolerances can be found in the Technical Data sec-
tion.
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