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A K D - 20 A N D E NTE LLYS I S
LO W VO LTAG E S W I TC H G E A R
3.6 Instrument/auxiliary compartment
An instrument/auxiliary compartment, Fig. 3.6,
is available as a standard feature. Relays, fuse
cutouts, and similar devices may be installed
in the instrument compartment or in
adjacent compartments.
Entellisys instrument/auxiliary compartment
(Entellisys only)
Each Entellisys low voltage switchgear lineup
contains standard devices housed within the
instrument compartments, Fig. 3.7. Two CPUs
(Central Processing Units) provide the processing
capability to support all switchgear functions. At
least one HMI (Human-Machine Interface) provides
user access to the Entellisys system. Network
switches provide communication links between the
CPU, the HMI, the EntelliGuard Messengers, and the
external world. A pair of uninterruptible power
supplies (UPS’s) and control power throw-over
relays supply highly reliable control power to these
system devices. For additional information and
instructions, reference DEH-501.
1. HMI (Human Machine Interface)
2. Network switches
3. Firewall security device
4. Cpu’s (Central processing units)
—
Fig. 3.6
Instrument/auxiliary
compartment
—
Fig. 3.7
—
Fig. 3.6
—
Fig. 3.7
IEntellisys instrument/
auxiliary compartment
4
2
1
3
