CAUTION
:
Before installing in a nuclear
application, determine that the product is
WARNING:
DESCRIPTION
The overload relay is provided with a
yellow trip indicator which is located to
the right of the reset arm, and is visible
tripped.
FEATURES
enclosure door to prevent opening the door
COIL REMOVAL
procedure.
2.
Clean magnet mating surfaces
CONTACT REMOVAL
RATINGS
INSTALLATION
Instructions for
NEMA size 2
Combination
GEH
-
4776 Instruction
intended for such use.
Disconnect power
before In-stalling or servicing.
Max.
Voltage
600 45
Max.
Continous
Amp
Rating
AC Volts
115
200
230
460/575
Max.Hp
For AC Motors
Single-
Phase
3
-
7½
-
A General Electric 300-Line full voltage
magnetic combination starter consists of a
magnetic contactor with a three leg block
overload relay and a manually operated
circuit breaker or disconnect switch. The
disconnect switch may either be fusible or
non-fusible. The non-fusible disconnect
switch provides a means of manually
disconnecting the motor from the line. The
circuit breaker or fusible disconnect switch
provides motor branch short-circuit
protection. The overload relay provides,
motor protection against running and
s
PolyPhase
10
15
25
Magnetic Starters
CR307-CR308, CR310-CR311, CR387, CR390, CR407-CR408
CR410-CR415, CR487, CR490, CR492, CR494 Series
when the overload relay is
-
1. Strongbox coil.
Overload relay, incorporates a dial for
2.
±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 #4 wire.
6. Starter can be disassembled and
inspected in a matter of seconds.
7.Circuit breaker or disconnect switch is
mechanically interlocked with the
until the handle is moved to the OFF
position.
Before connecting the starter:
1.
Remove all packing.
of any dust or foreign matter.
Select heaters in accordance
3.
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.
2. 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.
5. Remove coil from magnet.
6.
7. Reassemble device by reversing
Movable contacts can be inspected
and replaced in seconds—without
tools (Figure 3).
Replace coil.
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.
-
Ref.No
Catalog
Quantity
CHECK FOR WELDED CONTACTS IN
SIMPLE MAINTENANCE
Accessory Kits
*** Add suffix numbers for particular coil rating required. See COIL TABLE above
1.
Perform steps 1 through 5
PRINCIPAL RENEWAL PARTS
7.
Reassemble device by reversing
Do not attempt to remove or replace
Magnet and movable arm will fit either way
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
procedure.
NOTE:
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.
but will be quieter if reassembled the same
way they were 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.
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.
The ultimate tripping current of the installed
5.
relay heater can be adjusted ±10% by using
adjustment dial.
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.
Frequency 115V
60Hz 002 023 003 004 005 006
Frequency 110V 220V 380V 440V 550V 600V
50Hz 007 008 064 009 010 011
Use 022 for 120V, 60 Hertz/110V, 50Hertz coil.
200/
230V 460V 575V 600V
208V
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
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
Number
546A780G052
CR324D310F
CR324D360F
546A780G051
546A780G054
547A524G001
188D700P001
546A780G053
15D22G***
546A627P001
CR305X200C
Required
2
1
1
1
1
1
1
1
1
1
1
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