GE NEMA size3 Instructions page 2

Figure 3
1. Perform steps 1 through 5 under
"Coil Removal".
2. Remove magnet from molded
cover and movable arm.
3. Remove return spring from center
of movable arm.
4. Remove molded cover from
movable arm.
5. Depress and slide movable
contact, spring, and spring seat from
movable arm.
6. Remove screws holding stationary
contacts in place and remove
stationary contacts
7. Reassemble device by reversing
procedure
PRINCIPAL RENEWAL PARTS
Ref.No
1 Coil retainer assembly
2 Overload relay (3-heater, non-compensated form, 1 NC contact)
3 Overload relay (3-heater, non-compensated, 1 NO-1 NC contacts)
4 Set of stationary and movable contacts with springs for three pole
5 Molded cover for stationary and movable contacts-three-pole
6 Return spring for movable arm
7 Molded movable arm for 2-, 3-pole forms
8 Armature and frame (magnet) with spring retainer
9 Operating coil for 2-and 3-pole forms
10 Spring retainer for armature
*** Insert numbers for particular coil rating required. See Coil Table above
NOTE: Do not attempt to remove or
replace arc traps in arc chute cover.
When reassembling, note that the
arc chute cover will only fit one way and
is marked "TOP" in upper right hand
corner. Magnet and movable arm will fit
either way but will be quieter if
reassembled the same way they were
taken apart.
CHECK FOR WELDED CONTACTS IN
OVERLOAD RELAY
This feature permits the maintenance
man to check for welded relay contacts
by simply depressing the white operator
located at the top of the overload relay
contact housing. When the relay is in the
reset condition, an audible "click" will be
heard when the operator is depressed,
indicating that the contacts are
operating normally. A continuity check
can also be made by disconnecting the
control wiring from the terminals of the
relay and placing a bell set or a
resistance-measuring instrument in the
circuit. Connecting either of these across
the relay terminals will indicate the relay
contact is closed until the contact-check
operator is depressed, opening the
circuit.
The exclusive manual contact operation
check gives positive assurance that
contacts have not welded due to short
circuits in the control wiring.
Description
General Electric Company
41 Woodford Avenue, Plainville, CT 06062
DEH-40628 R01 08/10, 10-2049 © 2010 General Electric
Visit us on the web at www.Geindustrial.com
SIMPLE MAINTENANCE
300/400-Line starters and contactors require
virtually no corrective maintenance. Preventive
maintenance will assure many years of
dependable on-line service.
1. Always remove power from device before
performing any maintenance.
2. Keep magnet mating surfaces free of
accumulated dirt or dust.
3. DO NOT OIL OR GREASE the magnet mating
surfaces.
4. Contacts are carefully designed for maximum
life. They need only be replaced when nearly all the
silver tip is gone and the contact tip support is ex
posed. DO NOT FILE the contacts. Filing or
otherwise dressing the contacts only results in lost
tip material and reduces contactor or starter life.
5. The ultimate tripping current of the installed
relay heater can be adjusted ±10% by using
adjustment dial.
Replacement Coils
For two-and three-pole devices, order Cat. No.
55-501336G plus number in table below.
For four- and five-pole devices, order Cat. No.
55-153608G plus number in table below.
Example: 55-501336G002 is rated 115—120 V,
60 Hz/110V, 50 Hz.
Frequency 115-
(Hertz) 120V
60 002
Frequency
110V
(Hertz)
50 002
Accessory Kits
1st NO aux. cont. for Contactor right side mtg................ CR3O5X300A
1st NC aux. cont. for Contactor right side mtg................ CR3O5X300B
1st NO—NC aux. cont. for Contactor right side mtg...... CR3O5X300C
Additional NO aux. cont. for all forms.................................... CR3O5X100D
Additional NC aux. cont. for all forms ................................. CR3O5X100E
Pushbutton, START-STOP ............................................................. CR305X320B
Selector Switch, H—O—A ................................................
Selector Switch, OFF—ON ................................................
Indicating Light .....................................................................
Control Circuit Fuse ............................................................ CR305X341A, B, C, D
Surge Suppressor ..............................................................................CR305X146C
Catalog
Number
55-153677G053
CR324E310F
CR324E360F
55-153677G002
55-152655G008
55-152821G005
55-750320P007
55-153677G052
55-501336G***
55-501321P001
200- 230- 460- 575-
-----
208V 240V 480V 600V
023 003 ------ 004 005
----- 220V 380V 440V 550V
----- 003 064 004 005
CR305X330B
CR305X330D
CR305X350B
Quantity Required
2
1
1
1
1
1
1
1
1
1