GE Industrial Solutions AKD-20 Low Voltage Switchgear - Manuel (Page 18)

AKD-20 Low Voltage Switchgear
Chapter 3. Description
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The shutters are closed when the breaker is in the DISCONNECT
Position. As the circuit breaker is racked from the DISCONNECT
Position to the TEST Position the shutters remain fully closed. As
the breaker is racked from the TEST Position to the CONNECTED
Position, the shutters open allowing the breaker to connect to
the primary disconnects.
Figure 3-8 also shows the shutter assembly with the shutters
manually retracted to show the location of the primary
disconnect stabs behind the shutter assembly.
1. Stationary barrier
2. Moving barrier
3. Operating lever
4. Secondary disconnects
5. Primary disconnect stabs
Fig. 3-8. AKD-20 primary disconnect shutter assembly
(Envelope 1 cassette). Shutters manually retracted.
Fig. 3-9. EntelliGuard G circuit breaker
Note that extra items shown in Figs. 3-6, 3-7, and 3-8 (such as
secondary disconnects & shutters) are optional and may appear
in any compartment or not be included at all, depending on the
equipment specified.
The cassette racking arm slots engage fixed racking anchor pins
on the sides of the breaker. As the racking arms are rotated by
operation of the racking crank, the breaker is pulled into the
compartment, and locked in its final connected position.
The breaker should always be OPEN when it is moved into or out
of the CONNECTED position. As a safeguard, a draw out
interlock will cause the breaker to open before the breaker is
able to be moved.
All EntelliGuard G
circuit breakers of the same type and rating
may be interchanged, provided the breaker accessories have
the same ratings.
2
1
3
4
5