2
TYPE GCA SIZE 5 AC CONTACTOR
MOUNTING SURFACE
CONTROL CONNECTION
SCREW
Fig.
4
(From Dwg.
4808664)
Proper Assembly of Pressure Type Line
Terminals to the Contactor.
Both
I
ine and load terminals have 17 /32" diameter
holes for 1 /2" diameter hardware. Pressure type ter
minals, when used, should be assembled on the rear of
the copper line terminal straps, as shown in Fig.@ to
provide access to the control connection screws. Pres
sure type terminals may be assembled on either front
or rear of the load terminals.
Once installed, the assembly should be checked to
insure proper ope rat ion of the basic contact or mecha
nism and accessory devices before power� applied.
The following list and the maintenance instructions
should be used as a guide:
a)
The crossbar and springs must operate freely.
b)
Electrical and mechanical interlocks must be prop
erly installed and adjusted.
c)
Current transformers if required must be installed
and wired to the overload relay. Proper heaters
must be installed before operating the motor.
d)
The proper operating coi
I
must be installed and
properly connected.
e)
The arc box must be in place. The contactor must
never be
in a power circuit unless the
arcooxls
bolted in place.
f)
The main contacts must have overtravel and
spring force.
ELECTRICAL INTERLOCKS
0
escription
The Type GCA contactor will accommodate a total of
two Type L-56 electrical interlock units, providing a
total of 4 circuits. One L-56 interlock unit with 2
circuits is normally supplied on the left side.
The interlock unit is retained in a metal bracket by
spring clips and operated by a metal operator mounted
on the crossbar.
Additional interlock units are available with various
contact arrangements as I i sted in Fig.
®.
The kits
include the interlock unit, mounting bracket, operator
and the necessary hardware.
lnsta llation and Checking
The metal mounting bracket is mounted on the con
tact or base with the hardware provided. The L-56
interlock unit can then be installed.
I.L. 15-825-14A
The meta
I
interlock operator is then mounted on the
crossbar with the hardware provided.
For proper interlock operation, when the contactor is
fully closed, the interlock push rod can be manually
depressed .06 (1 /16 inch) further. If adjustment is
necessary, the s
I
ot in the end of the operator should
be opened or closed to obtain this .06 (1 /16 inch).
Interlock
Style No.Ll.
Style No. lor Interlock Kit
Pole
Interlock
(Includes Interlock Unit, Mountlnc
Combination
Unit Only
Bracket, Operator, and Hardware)
I NO· INC'
I80CI38G I8
3463 D 94 GIS
2 NO
180 C 13 8 G04
3463 D 94 G04
2 NC
180CI38GI9
3463D 94GI9
I NO
180 C 138 G02
3463 D 94 G02
I NC
180 C 138 G20
3463 D 94 G20
1 NO IE M)
180C138G05
3463 D 94 G05
1 NC
I
DB)
180 C 138 G06
3463 D 94 G06
1
N0·1 NC(D.B)*
180 C 138 G12
3463 D 94 G12
NO - Normally open c�rcuit
NC
=
Normally closed circuit
EM
=
Early Make
D.B.
=
Delayed Break
t:.
=
Supersedes 503C782
•=
Must use same polanty
series sty les
Fig.
5
Type L-56 Electrical Interlocks
MECHANICAL INTERLOCKS
The Type GCA Size 5 Contactor, when used in com
bination with other contactors, may be mechanically
interlocked to protect against the closing of one, when
the other is already closed. Mechanical interlock com
binations, for both vertical and horizontal assemblies,
are listed in Figs.@ and
Q).
Complete instructions
and adjustment procedures for Types M47 through M50
Mechanical Interlocks are contained in the Instruction
Leaflets listed .
Upper Contactor
Lower Contactor
GCA
GCA
Size
5
Size
5
or
6
A 1200
GCA
Size
3
or
4
Size
5
Fig.
6
Vertically Mounted Contactors
Mechanical Interlock Combinations
Left C ontactor
Right Contactor
GCA
GCA
Size
5
Size
5
or
6
A
200
GCA
Size
3
or
4
Size
5
Fig.
7
Horizontally Mounted Contactors
Mechanical Interlock Combinations
OVERLOAD PROTECTION
Use Mech.
lntlk. Type,
I.L. Number
M47
I.
L.
15 -82 9 -10
M 49
I.L
15 -829 -12
Use Mech.
Jntlk. Type,
I.L. Number
M 48
I. L.
15 -82 9 -11
M 50
I.
L.
15 -82 9 -13
Current Transformers and Overload Relays
The Type A Thermal Overload Relay is avai !able in
ambient compensated or non-compensated versions
which can be mounted directly on the contactor base
and do not require additional panel space. See Fig.
(!)
The relay is wired to 3 00/5 ratio current transformers
which are an integral part of the 3ize 5 Linestarter.
For complete information, refer to I.L. 15-827-20.
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