REG 316*4 1MRB520049-Uen / Rev. B ABB Switzerland Ltd
4-19
The measurement can be carried out with the machine station-
ary.
Procedure:
· Interrupt the REG 316*4 tripping circuits.
· Connect R
P
= 5000 W, 2000 W or 0 W to the positive pole of
the excitation circuit.
· Close the excitation switch.
· Switch on the auxiliary supply U
SH
.
· Measure the voltage for different values of leakage resistance.
· Set the voltage measured for 2000 or 5000 W on the
REG 316*4. The voltages are usually in the range of 0.5 and
3 V.
· Repeat the procedure for R
P
= 5000 W, 2000 W or 0 W, but
connected to the minus pole.
4.2.3.5.4. Testing in operation
This test checks that the REG 316 and the ancillary unit function
correctly with the generator in operation. Once again a rotor fault
is simulated by installing a leakage resistor. The protection must
effectively trip.
Fig. 4.7 Circuit for testing in operation
Leakage resistor R
P
: 1000 W, ³ 10 W, insulation voltage accord-
ing to IEC recommendations (for different
excitation voltages).
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