Cutler-Hammer W-VAC Anweisungen für Installation, Betrieb und Wartung - Seite 18

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CUTLER-HAMMER 24kV Type W-VAC Circuit Breaker
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 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 breaker for loose or
obviously
damaged
parts.
information
is
a
guide
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.
charging is complete and 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 the charging operation. Discontinue
charging and remove the maintenance tool as
soon as the "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.
Effective 12/98
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 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.
The
following
for
performing
4-7 NAMEPLATE
Compare the circuit breaker nameplate
information with switchgear drawings for
compatibility.
When
Figure 4-1 Type 24kV W-VAC Circuit Breaker
Manual Charging Handle in Us
Page 13 of 47
I.B. 8801C71H01