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Instruction Book
Page 22
SECTION 4: INSTALLATION
BEFORE PLACING THE BREAKER IN SERVICE,
CAREFULLY FOLLOW THE INSTALLATION PROCE-
DURE GIVEN BELOW. NOT FOLLOWING THE PRO-
CEDURE CAN FAIL TO UNCOVER SHIPPING DAM-
AGE THAT MAY RESULT IN INCORRECT BREAKER
OPERATION LEADING TO DEATH, BODILY INJURY,
AND PROPERTY DAMAGE.
4-1 INITIAL INSPECTION AND OPERATION
Before attempting to put the breaker in service, it should
be carefully examined and operated manually and elec-
trically. Examine a breaker for loose or obviously dam-
aged parts.
4-2 MANUAL OPERATION CHECK
Place the maintenance tool into the manual charge
socket opening and charge the closing springs with
about 3 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 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 further charge may result in
damage to the mechanism. Remove the mainte-
nance tool. Close and trip the breaker several
times (Figure 4.1).
4-3 VACUUM INTERRUPTER INTEGRITY
Using a dry lint free cloth or paper towel, clean all the
insulating surfaces of the pole units. Conduct a vacuum
interrupter integrity check as described in Section 6.4.
4-4 INSULATION
Check breaker primary and secondary insulation per
Section 6.7.
4-5 CONTACT EROSION AND WIPE
Manually charge the closing springs and close the
breaker. Check contact erosion and wipe as described
in Section 6.5.
4-6 PRIMARY CIRCUIT RESISTANCE
Check the primary circuit resistance as described in
Section 6.8 The resistance should not exceed the val-
ues specified. Record the values obtained for future ref-
erence.
4-7 NAMEPLATE
Compare the breaker nameplate information with
switchgear drawings for compatibility.
4-8 ELECTRICAL OPERATIONS CHECK
After going through the above steps, the breaker is now
ready to be operated electrically. It is preferred that this
check be made with a drawout breaker in a test position
or by using a test cable.
CAUTION
EXAMINE THE INSIDE OF THE CELL BEFORE
INSERTING OR MOUNTING THE BREAKER FOR
EXCESSIVE DIRT OR ANYTHING THAT MIGHT
INTERFERE WITH THE BREAKER TRAVEL OR
INSTALLATION.
WARNING
EXTREME CAUTION MUST BE EXERCISED TO
INSURE THAT PRIMARY CIRCUITS ARE NOT ENER-
GIZED WHILE CHECKS ARE PREFORMED IN THE
BREAKER COMPARTMENT. FAILURE TO DO SO
MAY RESULT IN PERSONAL INJURY OR DEATH.
When testing the breaker electrically, a TEST position
is accomplished with drawout breakers using several
methods. The method used depends on the switchgear
structure approach being utilized.
a1) If the breaker is being used in the behind the door
configuration, the structure mounted secondary contact
blocks can be manually engaged with the breaker's sec-
ondary contacts. This is accomplished with the breaker
still inside the structure and the primary contacts dis-
connected.
a2) If the breaker is being used in a flushmounted con-
figuration, the breaker must be moved to the discon-
nected position for testing. It is recommended that a test
cable be used to connect the female and male sec-
IB131009EN
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