GE Industrial Solutions Entellisys Installation - Manual (Page 55)

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Entellisys Low-voltage Switchgear
Chapter 5. Installing and Removing Circuit Breakers
Fig. 5-16. Mounting for special 2500-ampere fuse on EGF-16 breaker
5-8 Installing and Removing Fuse
Rollout Elements (FRE)-30-38-inch
Wide Compartments
The FRE is racked into and out of its compartment just like a
breaker. However, the fuse and breaker compartments each
are equipped with keylocks to prevent racking the FRE when
its associated breaker is closed. The FRE also utilizes a
rejection pin scheme similar to that used on EGS-32/40/50
breakers, to prevent installation of an incorrect FRE.
All FRE models feature a hinged, perforated steel screen
panel in front of the fuses as shown in Fig. 5-17. This panel
can be opened to allow access to the fuses, Fig. 5-18, only
when the FRE is in the WITHDRAWN position. In all other
positions, an interference plate attached to the right side of
the panel prevents it from being opened. Operation of the
breaker compartment keylock is the same for all models.
With the breaker open, the key can be removed; this extends
the lock bolt, thereby maintaining the breaker in a trip-free
state while in the CONNECT position Fig. 5-20. The breaker
can be racked at will regardless of the keylock position.
Fig. 5-17. Fuse rollout carriage (FRE) showing hinged, perforated steel
screen panel
Fig. 5-18. View showing perforated panel open to allow easy access to
fuses
The FRE compartment is KEY INTERLOCKED with the
associated breaker. The FRE is locked in the connect position
until a key is inserted in the FRE key interlock, Fig. 5-19, at
this time the FRE can be racked out.