GE Industrial Solutions 300 Line NEMA User Manual

Combination

CAUTION

Before installing in a nuclear

application, determine that the product is

WARNING:

DESCRIPTION

Line full voltage

magnetic combination starter consists of a

eg block

overload relay and a manually operated

circuit breaker or disconnect switch. The

disconnect switch may either be fusible or

fusible disconnect

switch provides a means of manually

disconnecting the motor from the line. The

uit breaker or fusible disconnect switch

circuit

protection. The overload relay provides,

motor protection against running and

The overload relay is provided with a

yellow trip indicator which is located to

the right of the reset arm, and is visible

ipped.

FEATURES

COIL REMOVAL

procedure.

Clean magnet mating surfaces of any

Instructions for

NEMA size 5

CONTACT REMOVAL

RATINGS

INSTALLATION

DEH

40630 Instruction

intended for such use.

Disconnect power

before Installing or servicing.

Max. Volt-

age

600 270 115

A General Electric 300-

magnetic contactor with a three l

non-fusible. The non-

circ provides motor branch short-

Max.

Contin

ous

Amp

Rating

AC Volts

200 230

460/575

Max.Hp

For AC Motors

Single-

Phase

Poly-

Phase

100 200

when the overload relay is tr

1. Strongbox coil. Overload relay, incorporates a dial

for ±10% field adjustment of tripping current, so that it is no longer necessary to change heaters to eliminate such problems as nuisance tripping in hot weather.

3. Overload trip indicator.

4. Straight through wiring.

5. Oversized power terminals will

accommodate up to 500MCM wire.

Starter can be disassembled and

inspected in a matter of seconds.

7. Circuit breaker or disconnect switch

is mechanically interlocked with the enclosure door to prevent opening the door until the handle is moved to the OFF position.

Before connecting the starter:

Remove all packing.

Magnetic Starters

CR307-CR308, CR310-CR311, CR387, CR390 Series

dust or foreign matter.

3. Select heaters in accordance with heater table, which accompanies each device.

4. Operate movable magnet and operating arm by pressing on the nameplate to assure free movement.

5. Mount the starter on a sturdy vertical support.

6. The overload relay may be reset manually by depressing and releasing the reset arm. Overload relays with an optional normally open contact are electrically isolated from the normally closed contact.

7. Provide motor branch circuit protection in accordance with the National Electrical Code.

The encapsulated coil is impervious to moisture, dirt, and oil. It resists mechanical damage and failure due to high humidity. No tools are required to remove coil.

1. Remove power from device. Press against coil while pulling up

slightly on coil retainers (A—Figure 1 or 2) and move retainers away from coil.

3. Withdraw magnet assembly, coil,

molded cover, and movable arm from device.

4. Withdraw spring clip (B—Figure 1

or 2) and remove armature from movable arm.

Remove coil from magnet.

6. Replace coil.

7. Reassemble device by reversing

Movable contacts can be inspected and replaced in seconds—without tools (Figure 3).

These instructions do not purport to cover all details or variations in equipment not to provide for every possible contingency to be met in connection with installation, operation or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purpose, the matter should be referred to the GE Company.

talog

Quantity

poles

CHECK FOR WELDED CONTACTS IN

SIMPLE MAINTENANCE

nearly all the

Perform steps 1 through 5 under

contact, spring, and spring seat from

Remove screws holding stationary

PRINCIPAL RENEWAL PARTS

NOTE:

Do not attempt to remove or

replace arc traps in arc chute cover.

te that the

arc chute cover will only fit one way and

in upper right hand

corner. Magnet and movable arm will fit

either way but will be quieter if

reassembled the same way they were

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

Accessory Kits

Figure 3

Surge Suppressor……………………………………………………………………………

………...CR305X146C

Replacement Coils

pole devices, order coil catalog

“Coil Removal”.

2. Remove magnet from molded cover and movable arm.

Remove return spring from center

of movable arm.

4. Remove molded cover from movable arm.

5. Depress and slide movable

movable arm.

contacts in place and remove stationary contacts

Reassemble device by reversing

procedure

When reassembling, no

is marked “TOP”

taken apart.

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.

First NO aux. cont. for CR305, CR306 (right side mtg)……………CR3O5X500A First NC aux. cont. for CR305, CR306 (right side mtg)……………CR3O5X500B First NO-NC aux. cont.for CR305, CR306 (right side mtg)……. CR3O5X500C Additional NO aux. cont. for all forms . . ……………………………………CR3O5X100D Additional NC aux. cont. for all forms . . ……………………………………CR3O5X100E Pushbutton……………………………………………………………………………………… CR305X520B Selector switch, H—O—A. …………………………………………………………… .CR305X530B Selector switch, OFF—ON. …………………………………………………………… CR305X530D Indicating light. ……………………………………………………………………………… CR305X550B Fifth pole. (for adding to 4-pole form only)……………………………… CR3O5X511B Control circuit fuse………………………………………………………………CR305X541A, B, C, D

300-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.

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 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.

The ultimate tripping current of the installed

relay heater can be adjusted ±10% by using

For two- and threenumber 55-530249G plus number in table below. For four- and five-pole devices, order coil catalog number 55-501493G plus number in table below. Example: 55-530249G002 is rated 115-120V, 60 Hz/110V, 50 Hz.

Frequency

(Hertz)

60 002 023 003 ------ 004 005

Frequency

(Hertz)

50 002 ----- 003 064 004 005

115-

200-

208V

230-

240V

120V

110V ----- 220V 380V 440V 550V

-----

460-

480V

575-

600V

Ref.No Description

Coil retainer assembly

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

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

Set of stationary & movable contacts with springs and screws for three-

Molded cover for three-poles

Return spring for movable arm

Molded movable arm with return spring for 2, 3 pole

Armature and frame (magnet) with retainer

Operating coil for 2-and 3-pole

Retainer for armature

Number

55-154607G003

CR324G310F CR324G360F

55-154607G041 55-530245G001 55-153205G002 55-154607G042 55-154607G045

55-530249G***

55-154607G046

Required

4 1 1 1 3 1 1 1 1 1

GE Industrial Solutions 300 Line NEMA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual