Ground Bus; Heaters - GE AKD-20 AR Installation And Maintenance Manual

DEH-41473

Ground Bus

All General Electric AKD-20 AR and Entellisys AR switchgear
sections are grounded to the internal equipment ground bus
(Figure 3.29) located at the bottom or the top of the cable
compartment

Heaters

If the switchgear will be stored for an extended period of time
prior to energization, space heaters (Figure 3.30) are provided
as an option for indoor equipment. They provide protection
against condensation of moisture that could, in combination
with air-borne contaminants, deteriorate insulation or cause
corrosion. One 1000-watt, 240-volt, operating at 120V (250-
watts) ac heater is located on the floor of the bus
compartment of each switchgear section. The heaters should
be energized at all times to prevent condensation within the
switchgear.
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AKD-20 AR / Entellisys AR Low-voltage Switchgear
Section 3. Switchgear Description
Figure 3.29 Ground bus
Feeder Cable Connections
(1)
Vertical Bus Cover
(2)
Horizontal Main Bus
(3)
Ground Bus (Behind Steel Cover)
(4)
Figure 3.30 Internal equipment heater (optional)
Internal Heater (Optional)
(1)
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



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