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DEH-41473
Section 6. Installing and Removing Circuit Breakers
General
Before installing, operating, or removing a circuit breaker,
refer to the breaker instruction manual for preparation,
inspection, and test. Check thoroughly for damaged or loose
parts and for any dirt or foreign matter which may be in the
breaker. Be sure that a thin film of GE lubricating grease
D6A15A2 is present on primary disconnects of the switchgear
before installing the breaker.
Circuit Breaker Identification
To select a circuit breaker for installation, proceed as follows:
1.
Before installing check the contact areas on each
primary disconnect bar or cluster of fingers for
foreign matter that may have accumulated. Clean
these areas if necessary. Be sure that a thin film of
GE lubricating grease D6A15A2 covers the contact
areas before putting a breaker in the compartment.
2.
Check to see that the breakers match their
respective compartments. Each breaker is assigned
a part or mark number. This number is shown on the
breaker sheets of the summary, the front view
drawings, and on the identification card on the
breaker shipping carton. The breaker may also be
identified using the 20 digit catalog number (AKD-20
AR Only) or using the 10 digit catalog number
(Entellisys AR Only).
3.
To locate the breaker in the proper compartment,
refer to the breaker location list on the front view
drawing. Find the proper breaker by the
identification card on the breaker carton. All identical
breakers will have the same mark and catalog
number.
Rejection Feature
Draw-out breakers of the same type and ratings are
interchangeable in their equipment compartments. Draw-out
breakers of different type or short-circuit rating are
intentionally made non-interchangeable to prevent inserting
the wrong type breaker into a draw-out compartment;
Unique "rejection hardware" is affixed to each breaker (Figure
6-1) and its cassette (Figure 6-2). When the wrong type
breaker is inserted into a compartment, the pins on the
breaker and the blocks in the cassette interfere, thus
preventing the wrong breaker from being racked onto the
primary stabs.
The complete rejection pattern code is included in Appendix C
(AKD-20 AR Only) and Appendix D (Entellisys AR Only).
©2016 General Electric. All rights reserved.
Courtesy of NationalSwitchgear.com
AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 6. Installing and Removing Circuit Breakers
Figure 6.1 EntelliGuard circuit breaker rejection pins
Figure 6.2 EntelliGuard circuit breaker rejection blocks
NOTICE: Breakers with a higher short circuit rating will fit
into a compartment for a lower short circuit rating. For
example, a GA08H* breaker can be inserted into a GA08N*
compartment. A GA08N* breaker, however, will be rejected
by a GA08H* compartment.
NOTICE: If a circuit breaker is rejected by the rejection
feature, check the breaker type and rating against the
equipment drawings.
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