Specifications

H1
GE Limitamp
®
Medium Voltage Motor Control
Application Data
H
Standard Service Conditions
Limitamp equipment is designed for the following standard
conditions: Operating ambient temperature -20° C to 40° C.
Storage ambient temperatures -40° C to 70° C; strip heaters
with thermostat control are recommended at 0° C. One heater
per enclosure. Thermostats may control up to 14 heaters.
• Altitude to 3,300 feet above sea level
• Humidity 0 to 90 percent (non-condensing)
Seismic Capability
Vacuum Limitamp Controllers can be used in various appli-
cations subject to shock and/or vibration. Certain controllers
will withstand forces generated by a Zone 4 earthquake as
defined in 1985 uniform building code for non-essential
equipment when properly anchored at ground level.
For Limitamp control with seismic capability, or other vibration-
type applications, refer your application details to the factory.
Applicable ratings are:
Qualified to IEEE-693-1997 HIGH level with 2.5 amplification
factor
Qualified to IBC-2003 S
ds
= 2.0g. S
s
=300%, I
p
= 1.5,
for all z/h in accordance with
ICC-ES-AC156.
Altitude Derating
Vacuum Limitamp Controllers, including power fuses, require
the following derating for use at high altitudes:
For current No derating required up to 6000 feet above
sea level.
Above 6,000 feet, derate by 0.9 percent for
every 1,000 feet above sea level.
For voltage No derating required up to 3,300 feet above
sea level.
Above 3,300 feet, derate by 2 percent for every
1,000 feet above sea level. BIL rating is also
derated by the same percentage.
Temperature Derating
Vacuum Limitamp Controllers require the following current
derating for ambient temperature.
• Up to 40° C — No derating
• 40-45° C — Derate 10 percent
• 45-50° C — Derate 20 percent
Estimated Heat Loss
The following data can be used for estimating heat loss of
Limitamp controllers at rated load amps. The estimates are
based upon a single full-voltage non-reversing 400 ampere
induction motor controller with basic panel options.
• CR194 Vacuum - 370 watts per contactor
Standards and Codes
Limitamp controllers are designed to meet NEMA Standard
ICS 3, Part 2 for Class E2 Controllers, and UL Standard 347 for
high-voltage industrial control equipment under UL File E57411.
Each UL-listed section includes a UL section nameplate and
each UL-listed motor controller includes a UL controller label.
Additional information can be found in Table A.3.
GE UL-Listed Vacuum Controllers
A. Full-voltage non-reversing induction motor starters, 2400-
4800 volts, up to 400 amperes rating.
B. CR194 one-high NEMA 1 enclosure, 26W or 34W x 90H x
30D, with stationary mounted vacuum contactor and DC
operating coil. CR194 two-high or one-high NEMA 1 enclosure,
36W or 40W x 90H x 30D, with stationary or drawout
mounted vacuum contactor and DC operating coil.
C. GE Type RA or RB current limiting power fuses.
D. Ambient compensated thermal overload relays (CR324C).
E. Solid state overload (CR324CX).
F. 1200, 2000 or 3000 amp copper main bus.
G. Phase and ground current transformers.
H. Control pow
er transformer with primary and secondary
fuse protection.
Approved Components For GE Controllers
A. Any UL-listed low-voltage component
B. Current transformers
C. Control wire, Type MTW, THW, SIS, XHHN
D. Power wire — MV-90 Dry
E. Control power transformers
See Table A.3 for details.
Standard Paint System —
Indoor & Outdoor Equipment
The standard Limitamp paint system consists of the following
two processes:
Phase I — Cleaning
In a seven-stage spray washer, steel parts are cleaned and
sprayed in controlled cleaning solutions. Cleaned steel parts
enter a drying oven at 300-350° F.
Stage Temperature Chemical Solution(s)
1 — Cleaning 115-120° Ridoline
2 — Rinse 105-118° Bonderite
3 — Iron Phosphate 90-105° Bonderite, Soda Ash
4 — Rinse Ambient None
5 — Acidated Rinse Ambient Parcolene
6 — Rinse Ambient None
7 — Deionized Rinse Ambient None