8
Westinghouse
I.L.
15-825-14A
TYPE GCA SIZE 5
AC CONTACTOR
2 OR 3 POLES
DESCRIPTION
Fig.
1
(Photo BD 70-0584)
Complete Linestarter Assembly with Type GCA-530 Con
tactor, Type
L-56
Electrical Interlock,
Current Trans
formers and Type A Thermal Overload Relay.
The Type GCA Size
5
AC Contactor is completely
assembled on an insulated base of molded glass-poly
ester. It is suitable for mounting on either steel or
insulating panels. Contactors are available in
2
or
3
pole front connected assemblies. A I inestarter assem
bly, see Fig. CD, incorporates integrally mounted
current transformers and overload relay.
This unit is supplied with an AC operating magnet.
The operating coils are designed for continuous duty
from
85%
to
110%
of rated voltage.
The contact
ratings are listed in Fig.®.
Characteristics
Open
Enclosed
Voltage Rating
600
600
8-hour rating, Amperes
300
270
Fig.
2
-
Ratings
FRONT CONNECTED
The main contacts are of the bridging or double break
type. Both moving and stationary contacts are faced
with a silver alloy, whose surfaces are kept clean by
a rolling and wiping action as the contacts seal.
Stainless steel compression springs in each moving
contact assembly insure adequate contact force while
providing resilience to allow for contact wear.
The arc box provides a mechanical stop for the mov
ing contact assembly and maintains the proper open
contact gap. In addition, the arc box contains De-ion®
arc quenchers which draw the arc away from the con
tacts at opening and produce a rapid and confined arc
interruption. Twin kick-out springs insure positive
drop-out of the armature assembly when the coil
is de - energized.
INSTALLATION
Before mounting and wmng, the desired acces�ories
such as electrical interlocks, mechanical interlocks,
current transformers and overload relays should be
mounted on the Type GCA Size
5
AC Contactor or
Line starter assembly.
The assembly should then be mounted with four
5/16"
dia. bolts. Mounting dimensions are shown in Fig.@ .
.50
LOAD
CONNECTORS
(17 f32•
DIA
3
HOLES!
5
775
Fig.
3
. 38 1.5012
MOUNTING SLOTS)
3/8'
DIA. OPEN END
MOUNTING SLOT
12
PLACES,
(From Dwg. 4808663)
Type GCA Size
5
AC Contactor Outline
1
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