Specifications

A1
GE Limitamp
®
Medium Voltage Motor Control
General
A
GE manufactures and provides full support for the following
types of medium voltage controllers:
Table A.1 Product Scope
Limitamp control is designed to meet NEMA ICS 3, Part 2 and
UL 347 requirements. Various enclosure types and construc-
tions are available and there is a broad selection of modifi-
cations for complete control and protection of motors used
on modern power-utilization systems with high available
short-circuit currents.
Applications
CR194 Vacuum Limitamp control is a high-interrupting
capacity, high-voltage control applied to distribution systems
rated 2400, 4160 or 4800 volts (7200-volt starters are available
in limited applications.) It is used throughout industry to control
and protect squirrel-cage, wound-rotor and synchronous
motors. It can also be used to feed transformers and other
power-utilization circuits.
Typical applications are in paper, steel, cement, rubber, mining,
petroleum, chemical and utility-type industries. Limitamp
control is also used in water and sewage plants and public
buildings for air conditioning, pumps and compressors.
Because of its flexibility, other uses for Limitamp equipment
have become common. Some of these uses are:
• Limitamp lineup consisting of a fused isolating switch ahead
of four NEMA Class E2 Limitamp controllers, the first three being
used as motor controllers and the last as a transformer feeder.
Controllers
Design Layout Construction
1-High 2-High Welded Bolted
CR194 Stationary Vacuum 800 amp X X
CR194 Drawout Vacuum 800 amp X X
CR194 Stationary Vacuum 400 amp X X
CR194 Stationary Vacuum 400 amp X X
CR194 Drawout Vacuum 400 amp X X X
• Limitamp lineup similar to last three units in the preceding
description. The transformer, 480-volt motor controllers,
and lighting transformer are included in an integrated
Limitamp design.
• Limitamp lineup consisting of a reversing isolating switch
ahead of a NEMA Class E2 Limitamp motor controller.
• Limitamp lineup consisting of two NEMA Class E2 Limitamp
motor controllers, each having interrupting ratings per
Table B.1.
CR194 control is designed for operation on the following
power systems.
Table A.2
À Based on 400 amperes RMS maximum, enclosed, NEMA 1, vented one-high
Á Based on 800 amperes RMS maximum, enclosed, NEMA 1, vented one-high
 For non-vented enclosures, apply a factor of 0.8 to the maximum horsepower
System Distribution
Voltage
Maximum Motor HpÂ
Induction, Wound-rotor
Synchronous (0.8 PF)
Synchronous (1.0 PF)
CR194 400 Ampere stationary and drawout
2400
1600À 2000À
4200
2800À 3500À
4800
3200 À
4000
7200
4800À 6000À
CR194 800 Ampere stationary
2400
3200 Á 4000 Á
4200
5600 Á 7000 Á
4800
6400 Á 8000 Á
4
80V
Lighting