IB131006EN
Page 19
Effective 07/2017
SECTION 4: INITIAL INSPECTION AND
INSTALLATION
4-1 INTRODUCTION
WARNING
BEFORE PLACING THE CIRCUIT BREAKER IN
SERVICE, CAREFULLY FOLLOW THE
INSTALLATION PROCEDURE GIVEN BELOW. NOT
FOLLOWING THE PROCEDURE CAN FAIL TO
UNCOVER SHIPPING DAMAGE THAT MAY RESULT
IN INCORRECT CIRCUIT BREAKER OPERATION
LEADING TO DEATH, BODILY INJURY, AND
EQUIPMENT DAM-AGE.
Before attempting to put a circuit breaker in service, it
should be carefully examined and operated manually
and electrically. In addition, carefully examine the
breaker for loose or obviously damaged parts. The
following information is a guide for performing
recommended checks and tests.
4-2 MANUAL OPERATION CHECK
Refer to Figures
3-5
and
4-1
and then proceed by placing
the maintenance tool into the manual charge socket
opening. Charge the closing springs with about 38 up
and down strokes of the handle. When charging is
complete the closing crank goes over center with an
audible
CLICK
and the springs Charged/Discharged
indicator shows “Charged.”
NOTICE
If the springs are to be charged on a closed circuit
breaker, no click is heard at the end of charging
operation. Discontinue charging and remove the
maintenance tool as soon as “Charged” flag is fully
visible. Continued attempts to charge further may
result in damage to the mechanism.
Remove the maintenance tool. Close and trip the circuit
breaker. Repeat several times.
4-3 VACUUM INTERRUPTER INTEGRITY
Using a dry, lint free cloth or paper towel, clean all the
accessible insulating surfaces of the pole units. Conduct a
vacuum interrupter integrity check as described in
Section 6.
4-4 INSULATION
Check the circuit breaker’s primary and secondary
insulation as described in Section 6.
4-5 CONTACT EROSION AND WIPE
Manually charge the closing springs and close the
circuit breaker. Check contact erosion and wipe as
described in Section 6.
4-6 PRIMARY CIRCUIT RESISTANCE
Check the primary circuit resistance as described in
Section 6. The resistance should not exceed the values
specified. Record the values obtained for future
reference.
4-7 NAMEPLATE
Compare the circuit breaker nameplate information with
switchgear drawings for compatibility.
Figure 4-1 Type VCP-W Circuit Breaker Manual
Charging Handle in Use
Summary of Contents for VCP-W
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