PGR-6101 Ground-Fault & Insulation Monitor
Page 10
Rev. 0-C-041918
FIGURE 7. PGA-0510 Analog Ohm Meter.
6. P
ERFORMANCE
T
ESTS
6.1 G
ROUND-
F
AULT
T
EST
Some jurisdictions require periodic ground-fault
performance tests. A test record form is provided for
recording the date and the result of the performance tests.
The following ground-fault system tests are to be
conducted by qualified personnel.
a) Evaluate the interconnected system in accordance with
the overall equipment manufacturer’s detailed
instructions.
b) Verify proper location of the PGC-5000-series CT.
Ensure the cables pass through the CT window. This
check can be done visually with knowledge of the
circuit. The connection of the current-sensor
secondary to the PGR-6101 is not polarity sensitive.
c) Verify that the system is correctly grounded and that
alternate ground paths do not exist that bypass the
current sensor. High-voltage testers and resistance
bridges can be used to determine the existence of
alternate ground paths.
d) Verify proper reaction of the circuit-interrupting
device in response to a simulated or controlled ground-
fault current. To simulate ground-fault current, use
CT-primary current injection. Fig. 8 shows a test
circuit using the SE-400 Ground-Fault-Relay Test
Unit. The SE-400 has a programmable output of 0.5
to 9.9 A for a duration of 0.1 to 9.9 seconds. Fig. 8
shows the use of resistors that reduce the injected
current to 10% of the SE-400 setting. Set the test
current to 120% of the PGR-6101 setting. Inject the
test current through the CT window for at least 2.5
seconds. Verify that the circuit under test has reacted
properly. Correct any problems and re-test until the
proper reaction is verified.
