Main Bus Compartment - Toshiba JK 720 Instruction Manual

Basic Installation and Operation Guide

Main Bus Compartment

Main bus bars extending horizontally throughout a line-up are
located in an isolated compartment located in the rear center of
the enclosure (Fig. 36). From the main bus, riser bars supply
power to the controller. Standard main bus bars are copper with
tin plating.
Access to the main bus compartment can be obtained either by
removing the enclosure back sheet or by swinging open the
hinged low voltage subpanel and then removing a fixed barrier
that covers the main bus.
Hazardous Voltage. Turn off and lock out
DANGER
all control and primary power before
accessing this compartment.
Bus splice links (Fig. 37) are furnished for joining the main bus
and ground bus between shipping sections. With the low voltage
subpanel swung open and the main bus barrier removed, all
splice links can be installed from the front of the unit. Refer to
Installation Section for details.
A copper ground bus, located in front of the main bus
compartment and above the isolation switch, is used to provide a
common ground between cubicles. The ground bus also provides
a termination point for grounding the enclosure and for
connecting the ground wires from shielded cable terminators.
Fig. 37 Bus Splice Links
TOSHIBA
JK Series 720 Controllers
Fig. 36a Main Bus (1200A & 2000A)
Compartment
Fig. 36b Main Bus (3000A) Compartment
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