DEH-41473
AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 3. Switchgear Description
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Front Compartments
The front enclosure of each section is divided into individual
compartments. These compartments house either a low-
voltage power circuit breaker or are used to mount
instruments, control components and other ancillary devices.
Instrument Panel (AKD-20 AR Only)
A standard instrument panel is located above each breaker
compartment eliminating cross-hinge wiring (Figure 3.4).
When required, optional devices may be included and
mounted on the front face of the panel such as breaker
control circuit fuses, pilot lights, and a RELT switch.
Fuses for the charge, close, and trip circuits of the electrically
operated EntelliGuard G breakers are mounted on the panel.
Routine wiring inspections and fuse checks or fuse
replacements can be performed with the breaker
compartment door in the closed position so that operators
are protected from the energized primary circuits.
Circuit Breaker Control Fuse Panel (Entellisys AR
Only)
Control fuses for the charge, close, and trip circuit of
electrically operated EntelliGuard E circuit breakers are
located on the lower left panel of the circuit breaker
escutcheon cover (Figure 3.5). Control fuses for the SET and
RESET coils of the optional Network Interlock accessory are
located similarly.
EntelliGuard Messenger (Entellisys AR Only)
An EntelliGuard Messenger is located above each breaker
compartment (Figure 3.6). The Messenger provides an
interface between the circuit breaker, the breaker
compartment, and the Entellisys system. For additional
information and instructions, reference DEH-501.
Instrument/Auxiliary Compartment
An instrument/auxiliary compartment is available as a
standard feature (Figure 3.7).
Relays, fuse cutouts, and similar devices may be installed in
the instrument compartment or in adjacent compartments.
CAUTION: The instrument/auxiliary compartment may
contain devices that operate at a variety of different
control voltages including both primary and secondary
sources. Review all equipment drawings, elementary,
remote connection drawings and the summary of
equipment prior to working inside.
Figure 3.4 AKD-20 AR instrument panel
(1)
Circuit Breaker Control Fuses
(2)
RELT Switch & Indicator
(3)
Pilot Indicating Lights
Figure 3.5 Entellisys AR circuit breaker fuse panel
Figure 3.6 EntelliGuard messenger
Figure 3.7 Instrument/auxiliary compartment
