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29
Installation
IB-60201
circuit breaker compartment, these plates will
interfere with each other and deter further
insertion. The interference will occur before
the circuit breaker reaches the disconnected
position. Do not attempt to force the circuit
breaker past the compartment interference
plate or remove the interference plates from
either the compartment or the circuit breaker.
Remove the incorrect rated circuit breaker and
insert a properly rated circuit breaker into the
circuit breaker compartment.
1) Prior to Inserting the Circuit Breaker into the
Circuit Breaker Compartment
a. Check the Primary Disconnecting
Devices and Circuit Breaker
Compartment
Examine the primary disconnecting
devices for any signs of damage and
contamination. Check to see that
none are bent out of alignment. If
contamination is found refer to
Ch 5 Maintenance
B. M
echAnISM
A
reA
,
2) L
ubrication
for cleaning and
lubrication procedures. If the primary
disconnecting devices are damaged
make no attempt to repair. Contact
Powell for further information.
Examine the circuit breaker
compartment to see that it is clean and
clear of debris that might interfere with
circuit breaker travel.
b. Racking the Circuit Breaker into the
Circuit Breaker Compartment
The described racking procedures
apply only for indoor type and non arc
resistant constructions. For all other
constructions, refer to the appropriate
instructions or instruction bulletin(s) for
the applicable racking procedures.
Racking a circuit breaker into the
circuit breaker compartment may
be accomplished by several similar
methods.
The standard circuit breaker (STD) may
be racked manually with or without
the use of a through-door option or
electrically using the optional Power
Racking device. The following describes
each method of racking as applicable to
the STD type of circuit breaker.
The standard circuit breaker (STD) is
designed to be manually racked into the
circuit breaker compartment with the
compartment door open. The standard
circuit breaker may also be manually
racked using the Through Door Racking
option to enable racking with the
compartment door closed. The optional
Power Racking device may be fitted on
the circuit breaker and will allow the
circuit breaker to be racked with the
compartment door opened or closed.
Note:
The Power Racking option cannot be
used in conjunction with the Through
Door Racking option on the Standard
Circuit Breaker.
Note:
The described racking procedures
are for racking the circuit breaker
into the lower circuit breaker
compartment only. To rack the circuit
breaker into an upper circuit breaker
compartment, refer to the metal-clad
switchgear instruction bulletin for
detailed information.
