Startco Engineering Ltd.
Page 10
SE-701 Ground-Fault Monitor
Rev. 0
Pub. SE-701-M, December 14, 2006.
7. G
ROUND-
F
AULT
P
ERFORMANCE
T
EST
To meet the requirements of the National Electrical
Code (NEC), as applicable, the overall ground-fault
protection system requires a performance test when first
installed. A written record of the performance test is to
be retained by those in charge of the electrical
installation in order to make it available to the authority
having jurisdiction. A test-record form is provided for
recording the date and the final results 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 ground-fault current
transformer. Ensure the cables pass through the
ground-fault-current-transformer window. This
check can be done visually with knowledge of the
circuit. The connection of the current-transformer
secondary to the SE-701 is not polarity sensitive.
c) Verify that the system is correctly grounded and that
alternate ground paths do not exist that bypass the
current transformer. 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. 7 (a)
shows a test circuit using a Startco 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. Set the test current to 120% of
the SE-701 setting. Fig. 7 (b) shows a test circuit
using a Startco SE-100T Ground-Fault-Relay Tester.
The SE-100T provides a test current of 0.65 or 2.75
A for testing 0.5- and 2.0-A trip levels. Inject the test
current through the current-transformer 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.
e) Record the date and the results of the test on the
attached test-record form.
NOTE:
Do not inject test current directly into CT-input
terminals 1, 2, 3, 4, and 5.
SE-400
SE-701
RMT1
REMOTE
TEST
9
8
1
5
3
11
12
RMT2
L
L
N
N
L1
L1
OP1
OP2
L2
L2
FROM
POWER
SOURCE
LOAD
a) USING SE-400
b) USING SE-100T
SE-100T
SE-701
L
L
N
N
L1
L1
C
LO
L2
L2
FROM
POWER
SOURCE
XXX:5
LOAD
HI
0.65 A
2.75 A
REMOTE
TEST
RMT
S2
5 A C
1 A
S1
1
2
3
4
5
11
10
5 A C
1 A
S1
1
2
3
4
5
XXX:5
S2
11
10
FIGURE 7. Ground-Fault-Test Circuits
TABLE 1. G
ROUND-
F
AULT-
T
EST
R
ECORD
D
ATE
T
EST
R
ESULTS
Retain this record for the authority having jurisdiction.
