Instal lation
breaker and move t he racking mechanism to the D IS
CONNECTED position.
4.
To prepare circuit breaker for insertion into the cubicle,
follow steps A-D of
Figure 1
on
Page 5.
5. Push breaker to D ISCONNECTED position. Interlock bar
prevents movement of breaker in cell, unless trip bar is
depressed.
6. While holding t he t rip bar in, open the racking window
and insert t he racking crank.
7.
Use crank to rack breaker into cell.
8. Check door iris for free movement while closing door.
9.
To remove circuit breaker, reverse the above proce
dures.
1 0. After t he circuit breaker is placed in the compartment .
rack it t o t he TEST position.
1 1 . Open t he compartment door. Close and t rip the circuit
breaker. Refer to OPERATING PROCEDURE.
Pages 6-9
for manually and electrically operated breakers.
D uring t he closing operat ion, observe t hat t he contacts
move freely without interference or rubbing between mov
able arcing contacts and parts of t he arc chutes. Then
refer to OPERATION,
Pages 6-9
for a detailed description
A DANGER
Heavy weight overhead.
Can cause death, personal injury or
property damage
4
Always use approved lift ing means to handle
circuit breakers or fuse carriages. Follow
instructions for use of lifting bar assembly.
Avoid excessive speeds and sudden stops.
Never lift a circuit breaker or fuse carriage
above an area where ersonnel are located.
of the circuit breaker operat ing characteristics before
placing t he circuit breaker in service. Make sure circuits
are not energized.
1 2. Trip units and accessory devices should receive a
thorough check before placing the circuit breaker in
service. This check makes certain t hat adjustments are
proper and parts are not damaged. Refer to 'Static Trip
Ill Information and Instruction Guide', SG-31 18.
1 3. Drawout circuit breakers are equipped with an interlock
to prevent movement of a closed circuit breaker into or
out of the connected posit ion. Circuit breaker interlock
operation should be checked before it is energized. See
DRAWOUT INTERLOCK,
Page 9,
and SPRING D IS
CHARGE INTERLOCK,
Page 9,
for a description of t hese
interlocks.
14. After complet ing t he installation inspection, check t he
control wiring (if any) and test the insulat ion.
1 5. Close t he compartment door. Rack the circuit breaker
into the CONNECTED position. Refer to RACKING
MECHANISM.
Page 9.
Remove the racking crank and
close t he racking window.
16. The circuit breaker can now be closed to energize the
circuit .
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