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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

Coil retainer assembly

Overload relay (3-heater, non-compensated form, 1 NC contact)

Overload relay (3-heater, non-compensated, 1 NO-1 NC contacts)

Set of stationary and movable contacts with springs for three pole

Molded cover for stationary and movable contacts-three-pole

Return spring for movable arm

Molded movable arm for 2-, 3-pole forms

Armature and frame (magnet) with spring retainer

Operating coil for 2-and 3-pole forms

Spring retainer for armature

*** Insert numbers for particular coil rating required. See Coil Table above

—

ABB Inc.

305 Gregson Drive

Cary, NC 27511.

electrification.us.abb.com

NOTE: Do not attempt to remove or

replace arc traps in arc chute cover.

When rea ssembling, 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

—

GE is a trademark of GE. Manufactured

by ABB Inc. under license from GE.

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, ord er Cat. No.

55-153608G plus number in table below.

Example: 55-501336G002 is rated 115—120 V,

60 Hz/110V, 50 Hz.

Frequency

(Hertz)

Frequency

(Hertz)

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

55-153677G053

CR324E310F

CR324E360F

55-153677G002

55-152655G008

55-152821G005

55-750320P007

55-153677G052

55-501336G***

55-501321P001

—

We reserve the right to make technical

changes or modify the contents of this

document without prior notice. With

regard to purchase orders, the agreed

particulars shall prevail. ABB Inc. does not

accept any responsibility whatsoever for

potential errors or possible lack of

information in this document.

115-

200-

230-

460-

-----

120V

208V

240V

480V

002

023

003

------

004

110V

-----

220V 380V 440V

002

-----

003

064

004

Catalog

Quantity Required

Number

We reserve all rights in this document and

in the subject matter and illustrations

contained therein. Any reproduction or

utilization of its contents – in whole or in

parts – is forbidden without prior written

consent of ABB Inc.

575-

600V

005

550V

005

CR305X330B

CR305X330D

CR305X350B