EMR-5000
IM02602012E
Commissioning: Overvoltage Protection [59M]
Object to be tested:
Test of the overvoltage protection elements, 3 x single-phase and 1 x three-phase (for each element).
Necessary means:
Three phase AC voltage source;
Timer for measuring of the tripping time; and
Voltmeter.
Procedure
(3 x single-phase, 1 x three-phase, for each element
)
Testing the threshold values:
For testing the threshold value
s and dropout values, the test
voltage has to be increased until the relay is activated.
When comparing the displayed values with those of the voltmeter, the deviation must be within the permissible toler-
ances.
Testing the trip delay:
For testing the trip delay, a timer is to be connected to the contact of the associated trip relay. The timer is started
when the limiting value of the tripping voltage is exceeded and it is stopped when the relay trips.
Testing the dropout ratio:
Reduce the measuring quantity to less than the set drop out value of the trip value. The relay must only dropout before
the set drop out value of the trip value.
Successful test result:
The measured threshold values, trip delays, and dropout ratios comply with those specified in the adjustment list.
Permissible deviations/tolerances can be taken from the Technical Data.
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