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Entellisys Low Voltage Switchgear
Chapter 3. Description
1. Quarter-turn latch
2. Steel plate (future breaker cubicle)
3. Compartment door
Fig. 3-13. Future breaker compartment
3-8 Compartments for Future
Breakers
When specified, compartments may be supplied for future
addition of circuit breaker elements. These compartments
are fully equipped with drawout rails, primary
disconnects, and ancillary devices as required (i.e.
secondary disconnects, accessory devices, etc.) The
opening in the breaker compartment door (3),
Fig.
3-13, is
closed with a bolted-on steel plate (2) to deter accidental
contact with energized electrical circuits. (I.e. primary
disconnect stabs).
3-9 Auxiliary/Transition Sections
Sections may be provided for any one or more of several
reasons including:
• Transition to a close-coupled transformer
• Incoming cable or busway when a main breaker
section is not provided
Auxiliary sections may be 22-inch, 30-inch, or 38-inch
wide as required to accommodate the space requirements.
The compartment doors on the front of the sections are
hinged and latched in the same manner as breaker
compartment doors.
Generally, transition sections will be 22-inches wide for
close-coupling to transformers.
Power company metering requirements generally require
either a 38-inch or 49-inch wide auxiliary section to
accommodate the current transformers, meters, test
switches, etc. as required by their individual practices,
tariff schedules, and/or regulatory commissions.
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