Principal Renewal Parts; Simple Maintenance; Accessory Kits - GE 300 Series Instructions

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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

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 and screws for 3 poles
5 Molded cover for stationary and movable contacts
6 Return spring for movable contact support
7 Molded movable contact support for 2, 3 poles
8 Armature and frame (magnet) with retainer
9 Operating coil for 2-and 3-pole forms
10 Spring retainer for armature
11 Cross electrical interlock
*** Add suffix numbers for particular coil rating required. See COIL TABLE above
7. Reassemble device by reversing
procedure.
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
GEH-4776B 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.

Accessory Kits

1 st NO aux. cont. (rt.side mtg)....................CR3O5X200A
1 st NC aux. cont. (rt.side mtg).....................CR3O5X200B
1 st NO-NC aux. cont.for (rt.side mtg)......CR3O5X200C
Additional NO aux. cont. for all forms......CR3O5X100D
Additional NC aux. cont. for all forms ....CR3O5X100E
Pushbutton........................................................... CR305X220N
Selector switch, H—O—A. ..............................CR305X230N
Selector switch, OFF—ON. ........................... CR305X230D
Indicating light. ................................................ CR305X250N
Fifth pole.(for adding to
4-pole form only).............................................. CR3O5X211B
Control circuit fuse........................................... CR305X241A, B, C, D
*** Coil Data
For three-pole device, order Catalog Number
15D22G plus number in table below.
200/
Frequency 115V
208V
60Hz 002 023
Frequency 110V 220V
50Hz 007 008
Use 022 for 120V, 60 Hertz/110V, 50Hertz coil.
Catalog Quantity
Number Required
546A780G052 2
CR324D310F 1
CR324D360F 1
546A780G051 1
546A780G054 1
547A524G001 1
188D700P001 1
546A780G053 1
15D22G*** 1
546A627P001 1
CR305X200C 1
230V 460V 575V 600V
003 004 005 006
380V 440V 550V 600V
064 009 010 011