Specifications

B6
GE Limitamp
®
Medium Voltage Motor Control
Controllers
B
CR194 One-High 800-Amp
The one-high enclosure for the 800-ampere vacuum contactor
has basic dimensions of 48” wide, 90” high and 30” deep in a
welded frame. Maximum cable sizes are shown in Table B.5.
Protected raceways isolate the motor and power leads from
one another. Cable runs may enter from the top or bottom
and are straight runs.
Weights and Dimensions
Vacuum Limitamp control varies in weight by controller type
and construction. The approximate weight for estimating
purposes is included in Table B.9.
Overall size of controllers vary according to type of controller
as shown in Table B.9.
Main horizontal power bus for electrically connecting sections
of Limitamp control does not add to the standard 90-inch
height.
CR194 One-High 400 Amp
The one-high packaging (one contactor per enclosure) for the
400-amper
e vacuum contactor has basic dimensions of 26
inches wide, 90 inches high, and 30 inches deep, including
power bus. It is constructed from a welded enclosure to house
a single vacuum contactor in the high-voltage compartment
located at floor level. The entire upper compartment is available
for low-voltage equipment and includes a swing-out panel for
ease of component mounting and accessibility.
This enclosure will accommodate cable sizes as shown in
Table B.7. Cable runs may enter from top or bottom without
modification. Top or bottom cable entrance into the enclosure
does not need to be specified.
The one-high design will accommodate the following
combination of components:
1. One three-phase potential transformer used for metering.
2. Up to 10 kVA extra capacity CPT (34” wide only). 3 KVA max
on two-high design.
3. Up to approximately 10 control relays for induction
motor starters.
4. Two size S1 drawout relay cases.
A 34-inch-wide, one-high enclosure is available as an option,
where more cable room or multiple cable connections are
required. Power factor correction capacitors can also be
supplied and will be mounted in an auxiliary enclosure. A
36-inch-wide, one-high enclosure is also available as an
option where a drawout contactor is required. See Table B.7
for maximum cable sizes.
Construction With Non-shielded Cable With Shielded Cable and Prefabricated
Stress Cones
With Shielded Cable and Hand- wrapped
Stress Relief
Per phase Per phase Per phase
400-Ampere Incoming Load Incoming Load Incoming Load
One-high 26”-wide Case 1-500 kcmil 1-500 kcmil 1-500 kcmil 1-500 kcmil 1-500 kcmil 1-250 kcmil preferred
1-500 kcmil possible
One-high 34”-wide Case 2-500 kcmil 2-500 kcmil 2-500 kcmil 2-500 kcmil 2-500 kcmil 2-500 kcmil
Two-high 36”-wide Case Contact Factory 1-500 kcmil Contact Factory 1-250 kcmil preferred
1-500 kcmil possible
Contact Factory 1-#3/0 preferred
1-#4/0 possible
Two-high 40”-wide Case Contact Factory 1-500 kcmil Contact Factory 1-500 kcmil Contact Factory 1-250 kcmil
800-Ampere
One-high 48”-wide Case 2-750 kcmil 2-750 kcmil 2-750 kcmil 2-750 kcmil 2-750 kcmil 2-750 kcmil
One-high 36”-wide Case 2-500 kcmil 2-500 kcmil 2-500 kcmil 2-500 kcmil 2-500 kcmil 2-500 kcmil
Table B.6 Cable Size Limits (approximate) in CR194 Vacuum Control