Specifications

E2
GE Limitamp
®
Medium Voltage Motor Control
Enclosures
E
Table E.1 Enclosure dimensions
Nameplates
Enclosure nameplates are provided for identification on front
panels and internally for identifying units and devices.
Standard unit nameplates are 1" x 3" 2-ply thermoplastic,
black letters on white background or white letters on black
background.
Front panel device nameplates are 1/2" x 1 1/2" thermoplastic.
Internal device nameplates are fabric type with adhesive
backing. Update. Optional Thermoplastic nameplates are
available as an option
Thermoplastic nameplates are available with optional corro-
sion-resistant steel screws.
Table E.2 Enclosure features
1
In starter only
2
One in starter, one in aisle
Limitamp Bus Systems
AC power bus is used for conducting power throughout a
group of starters joined together in a lineup. Incoming power
Description
NEMA 3R Non-walk-in NEMA 3R Walk-in
42” deep 92” deep
Strip heater Standard
1
Standard
2
Thermostat Standard Standard
Receptacle Option Standard
Incandescent light Option Standard
Door stops Standard Option
Floor sills Standard Standard
Type Description Page
NEMA 1 motor
starters bolted
construction
CR194 400A, 2 high, 36" wide (stationary or draw-out) E4
CR194 400A, 2 high, 40" wide (stationary or draw-out) E5
CR194 400A, 1 high, 36" wide (stationary or draw-out) E6
CR194 400A, 1 high, 40" wide (stationary or draw-out) E7
NEMA 1 motor
starters welded
construction
CR194 400A, 1 high, 26" wide E8
CR194 400A, 1 high, 34" wide E9
CR194 800A, 1 high, 48" wide E10
NEMA 3R motor
starters bolted
construction
CR194 400A, 1 high, 36" wide non-walk-in (stationary or draw-out) E11
CR194 400A, 1 high, 40" wide non-walk-in (stationary or draw-out) E12
CR194 400A, 1 high, 36" wide walk-in (stationary or draw-out) E13
CR194 400A, 1 high, 40" wide walk-in (stationary or draw-out) E14
NEMA 3R motor
starters welded
construction
CR194 400A, 1 high, 34" wide & CR194 800A, 1 high, 48" wide
non-walk-in
E15
CR194 400A, 1 high, 26" & 34" wide walk-in E16
CR194 800A, 1 high, 48" wide walk-in (stationary or draw-out) E17
NEMA 1 IC1074
bolted load
break switch
1200A & 600A, 1 high, 38" wide E18
NEMA 3R IC1074
draw-out load
break switch
600A, 2 high, 44" wide non-walk-in E19
600A, 2 high, 44" wide walk-in E20
cable can be terminated at one or more points in the lineup
and the power bus employed to distribute power throughout
the length of the group.
This bus is available in ratings of 1200, 2000 and 3000 (foot-
note) amperes and may be tin-plated copper, silver-plated
copper or bare copper. NEMA 1 is available up to 3600A. For
higher ratings refer to factory. Derating is necessary in certain
applications. The 1200/2000A horizontal bus compartment
is located within the standard 90-inch-high enclosure in the
same position as in current and previous air-break designs,
dating back to 1960, making all compatible. Limitamp hori-
zontal bus is rated 60kV basic impulse level (1.2 x 50? sec
wave). Mechanical strength under short-circuit currents is 50
kA RMS symmetrical.
Ground Bus
Ground bus in a Limitamp lineup provides a low-resistance
path betw
een ground connection points in any group of
controllers. This low-resistance path is a bus bar and is for the
purpose of decreasing to a low value a possibly hazardous
voltage difference between grounding points in the starter
group. These voltage differences would occur under ground
fault conditions if a low-resistance ground path were not
provided.
The ground bus is normally located near the AC power bus on
the inside rear of the enclosure. The bus provides a common
termination point for all ground connections within each
controller, including the enclosing case, and offers a convenient
terminal for incoming ground cables. It should be noted that
the customer must make a suitable ground connection to
the bus in order to make it effective. When ground bus is not
provided, the ground connection may be made to the ground
stud provided.
Extensions to the ground bus are located in the incoming
line cable compartment and near the load termination
points in the high-voltage compartment to make grounding
cable shield terminations easy to accomplish.
Control Bus
Control (wired) bus is a convenient means of conducting
control power throughout a group of controllers joined
together in a lineup. Conductors from a single control power
source may be terminated in one unit in the lineup and the
control bus employed to distribute the power to each unit of
the grouped lineup. Control bus may also be used to distrib-
ute the power from a single control transformer located in
the lineup.
Control bus normally consists of properly sized insulated
wire conductors run between terminal boards.
Standard voltage for control bus is 120 or 240 volts AC and