Specifications

E3
GE Limitamp
®
Medium Voltage Motor Control
Enclosures
E
maximum current rating is determined by application, such
as total present and anticipated future load.
Potential Bus
Potential (wired) bus is a means of distributing a common
source of low voltage throughout the lineup for metering
and instrumentation. Potential bus consists of properly sized
wire connected between terminal boards typically mounted
on the top inside of enclosure. Maximum voltage is 600 volts.
Communication Bus
Communication (wired) bus is a means —-finish edit.
Insulated Power Bus
Insulating the AC power bus reduces the possibility of bus
faults from causes such as surge voltages, ionized vapors,
falling objects (tools, etc.), ground tapes, etc. It also prevents
corrosion and oxidation of the bus and its hardware.
The standard power bus consists of bare conductors on
insulator supports. Insulation for the conductors can be pro-
vided, and it may consist of various types of insulating
material, such as 130°C HV rubber splicing tape or other
material dictated by availability and individual job require-
ments.
The CR194 two-high Vacuum Equipment design uses epoxy-
insulated 2000A max main and vertical bus as standard.
Table E.3 Bus cross section
Bus type Rating Cross section
Main bus
1200A 1/4" x 3" copper
2000A (2) 1/4" x 3" copper
3000A (2)1/26??
Vertical bus
400A 1/4" x 1" copper
800A 1/4" x 3" copper
Ground bus
400A 1/8" x 2" copper
600A 1/4" x 2" copper