CR194 Two-High Vacuum Limitamp@ Control
WARNING: Before any adjustments, servicing,
parts replacement or any other act is performed
requiring physical contact with the electrical work-
ing components or wiring of this equipment, all
power must be removed and locked off from all
sources and all attached rotating equipment must
have come to a complete stop. User personnel
must be completely familiar with the following op-
erating and maintenance instructions before at-
tempting to service this equipment.
WARNING: The vacuum interrupter integrity test
should be performed before the high voltage
vacuum contactor is energized for the first time and
each time the contactor is returned to service after
maintenance, adjustment or repair. Failure to per-
form this test may result in serious injury or death.
CAUTION: Product is not intended for nuclear use.
INTRODUCTION
CR194 two-high vacuum Limitamp@ controllers are
designed to meet NEMA ICS 3, Part 2 “AC General
Purpose High-voltage Class E Controllers” and UL 34’7
requirements, and may be described as metal-enclosed
high-interrupting capacity vacuum contactor type
starter equipment with manual isolation. Individual
starters and controllers are designed for specific appli-
cations; the components and functions being dictated
by the purchaser specifications and needs. Controllers
may be fused or unfused.
The essential control functions for all types of a-c
motors consist of starting, stopping and overload pro-
tection. Vacuum Limitamp@ controllers also include
short-circuit protection, and other functions in great
variety as may be required for particular applications.
These instructions were prepared as a guide to
handling, installation, operation and maintenance of
the CR194 two-high vacuum Limitamp” controller.
Figure 1 shows a 36”wide two-high starter with induc-
tion motor controllers in top and bottom. Figure 2
shows the same controller with the low-voltage doors
open. Figure 3 shows the same controller with the
high-voltage doors open.
The intent of these instructions is to give the
purchaser the necessary general information to iden-
tify his controller as to type and function, to describe
suggested methods of installation, and to demonstrate
some techniques of operation and maintenance. The
purchaser should interpret these instructions for ap-
plicability to his particular controller by referring to
the nameplate data on the controller and to the elec-
trical diagrams supplied with the controller.
For application questions refer to GET-6840. For de-
tails on the high-voltage contactor refer to GEH-5306.
e
Figure 1.36”~wide two-high induction motor controllers
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