Initial Inspection And Installation; Introduction; Manual Operation Check; Vacuum Interrupter Integrity - Eaton Cutler-Hammer W-VAC Instructions For Installation, Operation And Maintenance

Page 12
SECTION 4: INITIAL INSPECTION AND
INSTALLATION

4-1 INTRODUCTION

!
BEFORE PLACING THE CIRCUIT BREAKER IN SER-
VICE, CAREFULLY FOLLOW THE INSTALLATION
PROCEDURE GIVEN BELOW. NOT FOLLOWING THE
PROCEDURE CAN FAIL TO UNCOVER SHIPPING
DAMAGE THAT MAY RESULT IN INCORRECT CIR-
CUIT BREAKER OPERATION LEADING TO DEATH,
BODILY INJURY, AND EQUIPMENT DAMAGE.
Before attempting to put a circuit breaker in service, it
should be carefully examined and operated manually
and electrically. In addition, carefully examine the break-
er 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 3-6 and 4-1 and then proceed by plac-
ing 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 com-
plete 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.
WARNING

4-4 INSULATION

Check the circuit breaker's primary and secondary insu-
lation as described in Section 6.

4-5 CONTACT EROSION AND WIPE

Manually charge the closing springs and close the cir-
cuit 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 refer-
ence.

4-7 NAMEPLATE

Compare the circuit breaker nameplate information with
switchgear drawings for compatibility.
Figure 4-1 Type W-VAC Circuit Breaker Manual
Charging Handle in Use
I.B. 3A74791H04
Effective 7/97