GE Industrial Solutions 300-400 Line NEMA User Manual

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Max.Hp

Starter

Max.

(open

Note:

For starters with one or more

device. Remove return spring from center

Normally Closed

Contacts

normally open to normally closed with no

additional parts. Perform steps 1 through

and spring seat against movable contact

Check For Welded C

ontacts In

Remove screws holding stationary

Combination

Motor branch circuit and control circuit

current protection should be

supplied in accordance with the

National Electrical Code. CR305

contactors are suitable for use on a

t capable of delivering not more

than 5,000 RMS symmetrical amperes,

600 volts maximum when protected by

H, J, K1, K5, RK1, RK5 class fuses, or a

circuit breaker having an interrupting

rating not less than 5,000 RMS

Installation

Operate movable magnet and operating

Coil Replacement

Contact Replacement

rom molded cover

Instructions F

NEMA size 0 & 1

GEH

5193 Instruction

CAUTION:

ore installing in a nuclear

application, determine that the product is

WARNING

Description

voltage

motor starters include a magnetic

leg block overload

relay, providing motor protection against

running and stalled motor overloads. The

overload relay is provided with a yellow

trip indicator located to the right of the

reset arm, and is visible when the

Ratings

—

600 V Maximum

Figure1.Ty

pical 300/400

Line magnetic starter

Figure2

Supersedes GEH-4793B & GEH4796B

intended for such use.

before Installing or servicing.

General Electric 300/400-Line full-

contactor and a three-

overload relay is tripped

Max

Current

Rating

18 amp

and

enclosed)

27 amp

and

enclosed)

Bef

Contactor

Current

Rating

20 amp

(open)

18amp

(enclosed)

30 amp

(open)

27amp

(enclosed)

Disconnect power

Volts

Size 0

115 1 -

200 - 3

230 2 3

460—575 - 5

Size 1

115 2 -

200 - 7½

230 3 7½

460—575 - 10

For AC Motors

Single-

Phase

Poly-

Phase

Magnetic Starters

CR307-CR308, CR310-CR311, CR387, CR390, CR407-CR408 CR410-CR415, CR487, CR490, CR492, CR494 Series

over-

circui

symmetrical amperes.

Before connecting controller to power supply:

1. Remove all packing.

2. Clean magnet mating surfaces of any

dirt or foreign matter.

3. Select and install heaters in accordance with heater table.

arm by pressing on the nameplate to assure free movement.

5. Mount on a sturdy vertical support.

6. Make the electrical connections.

7. The starter overload relay may be reset

manually by depressing and releasing the reset arm.

1. Remove power from device.

2. Press against coil while pulling up

slightly on coil retainers (A—Figure 1) 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) and remove armature from movable arm.

5. Remove coil from magnet.

6. Replace coil.

7. Reassemble device by reversing

procedure.

1. Perform steps 1 through 5 under Coil Replacement.

2. Remove magnet f and movable arm.

3. Remove return spring from center of movable arm.

4. Remove molded cover from movable arm.

Depress and slide movable contact

and spring from movable arm.

contacts in place and remove stationary contacts.

7. Reassemble device by reversing procedure.

normally closed contacts, perform steps 1 and 2 shown under Coil Replacement. Withdraw spring clip (B—Figure 1) and remove armature, coil, and magnet from

of movable arm. Remove molded cover and stationary contacts before lifting movable arm from device.

The contacts may be converted from

4 shown under Coil Replacement. Lift coil and magnet from movable arm. Remove return spring from center of movable arm. Depress movable contact spring

and rotate these parts 1/2 turn without removing them from window. Remove the stationary contacts. Install the movable arm in the device. Install the stationary contacts so that their silver pads face the movable contact silver pads. Reassemble the device. To change contacts from normally closed to normally open position, reverse the above procedure.

Overload Relay With power disconnected, disconnect the control wiring from the relay terminals. Place a bell set or resistance measuring instrument across relay terminals. Depress and release reset

arm to insure relay is reset

Left Cont..

Right Cont.

In this condition there should be continuity

Maintenance

The ultimate tripping current of the installed

Caution:

Before adjusting or operating reverser,

On reversing and two

speed

starters, the

***

Coil Suffix Table

Accessory Kits

Principal

Ren

ewal Parts

between the terminals. Depress white manual check operator to trip the relay. In the tripped condition the circuit between the terminals should be open indicating the contacts are operating normally. Rewire the terminals and reset the relay for normal operation

1. Always remove power from device before performing any maintenance.

2. Keep magnet mating surface free of accumulated dirt or dust.

3. Do Not Oil Or Grease the magnet mating surfaces.

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 exposed. Do Not File the contacts. Filing or dressing the contacts only results in lost tip material and reduces life.

relay heater can be adjusted ± 10% by using the adjustment dial, shown in Figure 1.

mechanical interlock has been factory adjusted and normally should never have to be readjusted. If readjustment is ever needed, these steps should be followed:

Close one contactor by hand by pushing down on

armature. B. Using the other hand, loosen the nut on opposite contactor interlock arm and slide it towards the top of the elongated slot until all gap is taken up between the two arms. Follow the same procedure with the opposite contactor and interlock arm. C. Best adjustment is usually obtained when both mechanical interlock arm assemblies are as far up in the elongated slot as possible.

With both arms adjusted, there should be a very

slight gap (approximately 1/16- inch) between the arms with both contactors open. Neither arm should overlap the other with both contactors open.

make sure the mechanical interlock arm is engaged with movable contact arm.

(Order 15D21G plus coil suffix number below)

60 Hertz

50 Hertz 110 ----- 220V 380V 440V 550V

Coil Suffix 002 023 003 064 004 005

115-

120V

200208V

230-

240V

----

460480V

First NO aux. cont.for CR305, CR306…………CR3O5X100A First NC aux. cont. for CR305, CR306…………CR3O5X100B First NO-NC aux. cont.for CR305, CR306.. .CR3O5X100C Additional NO aux. cont. for all forms. . … CR3O5X100D

Additional NC aux. cont. for all forms . . .. CR3O5X100E

Pushbutton………………………………………………….. CR305X120N Selector switch, H—O—A. ………………………… CR305X130N Selector switch, OFF—ON. ……………………… CR305X130P Indicating light. ………………………………………… CR305X150N Fifth pole. …………………………………………………… CR3O5X111B

Ref.No

Figure.4

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 and screws for four poles: NEMA Size 0 NEMA Size 1

Molded cover for stationary and movable contacts

Return spring for movable contact support

Molded movable contact support for 2-, 3-, 4- pole

Armature and frame (magnet)

Operating coil

Spring retainer for armature

Overload relay for 2-speed single-winding controller (1 NC contact)

*** Add coil suffix number from above table to complete the catalog number. Example: Cat. No. 15D21GO02 has ratings of 115—120V, 60 Hz and 11OV, 50 Hz. +Omitted on 2-speed single-winding controller. ++ Quantity one for multi-speed controller.

Overload relay for 2-speed single-winding controller (1 NO-1 NC contact)

Description

Catalog Number

546A301G050

CR324C310F CR324C360F

--------------546A300G002 546A301G053 188D711P001 541A278P001 187D350P001 546A301G054

15D21G***

546A588P001

CR324C310G CR324C360G

CR307/CR308/

CR387

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.

Quantity Required

2 1 1

1 1 1 1 1 1 1 1

CR301/CR311/CR390

2 1+ 1+

1 1 1 1 1 1 1 1 1 1

575-

600V

2 ++ ++

1 1 1 1 1 1 1 1

GE Industrial Solutions 300-400 Line NEMA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual