Eaton EDR-5000, Инструкция по установке, эксплуатации и обслуживанию, Страница: 694 / 1017

EDR-5000 IM02602007E
Commissioning Examples for the Power Protection Module
Object to be tested:
Testing the projected Power Protection Modules:
P>;
P<;
Pr>; and
Pr<.
Necessary means:
3-phase AC voltage source ;
3-phase AC current source; and
Timer.
Procedure – Testing the wiring:
•
Feed rated voltage and rated current to the measuring inputs of the relay.
•
Adjust the current pointers 30 degrees lagging to the voltage pointers.
•
The following measuring values have to be shown:
P=0.86 Pn;
Q=0.5 Qn; and
S=1 Sn.
If the measured values are shown with a negative (algebraic) sign, check
the wiring.
The examples shown within this chapter have to be carried out with the
tripping values and tripping delays that apply to the User's switchboard.
If the User is testing „greater than thresholds“ (e.g.: P>), start at 80% of the
tripping value and increase the object to be tested until the relay picks up.
In case the User is testing „less than thresholds“ (e.g.: P<), start at 120% of
the tripping value and reduce the object to be tested until the relay picks
up.
If the User is testing tripping delays of „greater than“ modules (e.g.: P>),
start a timer simultaneously with an abrupt change of the object to be
tested from 80% of the tripping value to 120% of the tripping value.
If the User is testing tripping delays of „less than“ modules (e.g.: P<), start
a timer simultaneously with an abrupt change of the object to be tested
from 120% of the tripping value to 80% of the tripping value.
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