GE Industrial Solutions MicroVersaTrip Plus and MicroVersaTrip PM DS-206, DSL-206,DS-416, DSL-416, DS-420, DS-632 - Manual (Page 17)

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Once the breaker has been converted, but before it is
energized, it must be tested. See below for testing and
troubleshooting details.
Testing
Before installing a converted breaker back into service,
perform the following steps:
Step 1.
Verify that the programmable trip unit is securely installed
by performing a continuity test on the CT wiring and
programmer. Disconnect the black CT wires at each phase
sensor. Then using a continuity tester or V.O.M., check for
continuity from the white CT wire lead of the phase “A”
CT to the white CT wire lead of the phase “B” CT. Repeat
this continuity test for the white CT wire leads of phase
“A” and phase “C”. Next, measure the resistance across
each phase sensor and compare the values measured to the
values listed in table 7-1. Be sure to reconnect the black
CT wire leads to all of the phase sensors prior to
performance testing the breaker.
CAUTION: In addition to the continuity test
described above and prior to performance test-
ing the converted breaker, each phase of the
breaker should be primary injected with a current
level of about 10% but no more than 20% of the
CT rating. During the application of test current,
the programmer’s screen should be activated by
depressing the battery button on its face and
check that the test current is displayed on the
screen for each phase tested. This test along
with the continuity test will confirm that no open
circuits exists in the CT harness and that the trip
unit is mounted properly. If the programmer
fails to display the test current, the test should be
stopped immediately and the programmer/wire
harness installation should be verified prior to
proceeding with any additional testing.
WARNING: IF THE CONVERTED BREAKER IS
ENERGIZED OR PRIMARY INJECTED USING A
SUFFICIENT LEVEL OF TEST CURRENT WITH A
LOOSE OR OPEN CIRCUIT BETWEEN THE CT’S
AND THE PROGRAMMER, DAMAGE WILL
OCCUR TO THE PROGRAMMER UNIT, WIRE
HARNESS, 36-PIN PROGRAMMER CONNECTOR
AND CT’S. FAILURE TO ADHERE TO THESE
INSTRUCTIONS WILL VOID ALL WARRANTIES.
Step 2.
Meggar the breaker primary circuit using a 1,000-Volt
Meggar.
Step 3.
Measure the resistance across the line and load terminals
for each phase using a Micro-Ohmmeter or Milli-Volt
tester. If the resistance differs considerably from phase to
phase, the electrical points may not be properly tightened.
Also, it may indicate improper contact wipe.
Step 4.
To verify that the breaker has been properly retrofitted, a
primary injection test should be performed on each phase.
This test will check the CT’s, bus, wiring harness, flux
shifter, and trip unit as a complete system. A high current,
low voltage power supply should be connected across each
line and load terminal to simulate an overcurrent fault. The
long-time may be set at 0.5 to minimize the breaker stress.
When ground fault is installed, the test can be performed
by wiring two adjacent poles in series or by using the GE
test kit Cat. No. TVRMS2. This will prevent the breaker
from tripping due to an unbalanced current flow.
Do not attempt to use GE test kit Cat. No.
TVTS1 or TVRMS on this programmer.
Troubleshooting
When malfunctioning is suspected, first examine the circuit
breaker and its power system for abnormal conditions such
as:
1. Breaker tripping in proper response to
overcurrents or incipient ground faults.
2. Breaker remaining in a trip-free state due to
mechanical interference along its trip shaft.
3. Inadvertent shunt trip activation’s.
WARNING: DO NOT CHANGE TAPS ON THE
CURRENT SENSORS OR ADJUST THE
PROGRAMMER TRIP UNIT SETTINGS OR
REMOVE THE PROGRAMMER TRIP UNIT WHILE
THE BREAKER IS CARRYING CURRENT.
FAILURE TO ADHERE TO THESE INSTRUCTIONS
WILL VOID ALL WARRANTIES.