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GENERAL DESCRIPTION
Toshiba medium voltage controllers are AC
general-purpose NEMA Class E controllers
designed for applications at utilization voltages
ranging from 2.3 through 6.6
They are
normally used to control motor loads, although
other types of loads such as transformers and
capacitors are possible.
CONSTRUCTION
The standard enclosure size is
wide by
36” deep by 90” high. In a typical two-high
arrangement, each enclosure is divided
vertically into three major compartments, each
with a separate door. The uppermost and
lowermost compartments contain medium
voltage controller components
while
the middle compartment contains low voltage
components
(Fig. 7). Other
variations of this basic arrangement are
possible.
Main horizontal bus is provided when required
to supply power to a line-up of controllers.
The main bus is located at the rear of the
enclosure midway between the top and
bottom. A common ground bus is also
provided for multiple sections.
Each controller compartment (Fig. 8) consists
of:
Fixed mounted non-load break isolation
switch.
Withdrawable contactor carriage with
power fuses.
Built-in service drawer for removing
contactor carriage from compartment.
Current transformers for metering.
Control power transformer and optional
potential transformer.
Load cable terminations.
Fig. 7 Typical Controller Arrangements
Fig. 8 Controller Compartment
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
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