GE GuardSwitch 300 Series User manual

s
Max.Hp
For AC Motors
Max.
Volt-
age
Max.
Continous
Amp
Rating
AC Volts
Single-
Phase
Poly-
Phase
600 4 11
200
230
460/ 7
3
-
7½
-
-
10
1
2
CAUTION
:
Before installing in a nuclear
application, determine that the product is
intended for such use.
WARNING:
Disconnect power
before In-stalling or servicing.
DESCRIPTION
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
stalled motor overload.
The overload relay is provided with a
yellow trip indicator which is located to
the right of the reset arm, and is visible
when the overload relay is
tripped.
FEATURES
1. Strongbox coil.
2. 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 #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
enclosure door to prevent opening the door
until the handle is moved to the OFF
position.
COIL REMOVAL
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. Replace coil.
7. Reassemble device by reversing
procedure.
2.
Clean magnet mating surfaces
of any 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.
CONTACT REMOVAL
Movable contacts can be inspected
and replaced in seconds—without
tools (Figure 3).
RATINGS
INSTALLATION
Before connecting the starter:
1. Remove all packing.
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.
Inst uctions fo
NEMA size 2
Combination
Magnetic Sta te s
CR307-CR308, CR310-CR311, CR387, CR390, CR407-CR408
CR410-CR415, CR487, CR490, CR492, CR494 Se ies
GEH
-
4776 Inst uction

-
Ref.No
Description
Catalog
Number
Quantity
Required
1
2
3
4
5
6
7
8
9
10
11
Coil retainer assembly
Overload relay (3-heater, non- ompensated form, 1 NC onta t)
Overload relay (3-heater, non- ompensated, 1 NO-1 NC onta ts)
Set of stationary and movable onta ts with springs and s rews for 3 poles
Molded over for stationary and movable onta ts
Return spring for movable onta t support
Molded movable onta t support for 2, 3 poles
Armature and frame (magnet) with retainer
Operating oil for 2-and 3-pole forms
Spring retainer for armature
Cross ele tri al interlo k
546A780G052
CR324D310F
CR324D360F
546A780G051
546A780G054
547A524G001
188D700P001
546A780G053
15D22G***
546A627P001
CR305X200C
2
1
1
1
1
1
1
1
1
1
1
CHECK FOR ELDED CONTACTS IN
OVERLOAD RELAY
This feature permits the maintenan e
man to he k for welded relay onta ts
by simply depressing the white operator
lo ated at the top of the overload relay
onta t housing. When the relay is in the
reset ondition, an audible “ li k” will be
heard when the operator is depressed,
indi ating that the onta ts are
operating normally. A ontinuity he k
an also be made by dis onne ting the
ontrol wiring from the terminals of the
relay and pla ing a bell set or a
resistan e measuring instrument in the
ir uit. Conne ting either of these a ross
the relay terminals will indi ate the relay
onta t is losed until the onta t- he k
operator is depressed, opening the
ir uit.
The ex lusive manual onta t operation
he k gives positive assuran e that
onta ts have not welded due to short
ir uits in the ontrol wiring.
SIMPLE MAINTENANCE
300/400-Line starters and onta tors require
virtually no orre tive maintenan e. Preventive
maintenan e will assure many years of
dependable on-line servi e.
1. Always remove power from devi e before
performing any maintenan e.
2. Keep magnet mating surfa es free of
a umulated dirt or dust.
3. DO NOT OIL OR GREASE the magnet mating
surfa es.
4. Conta ts are arefully designed for
maximum life. They need only be repla ed
when nearly all the silver tip is gone and the
onta t tip support is ex posed. DO NOT FILE
the onta ts. Filing or otherwise dressing the
onta ts only results in lost tip material and
redu es onta tor or starter life.
5. The ultimate tripping urrent of the installed
relay heater an be adjusted ±10% by using
adjustment dial.
Accessory Kits
1 st NO aux. ont. (rt.side mtg)………………..CR3O5X200A
1 st NC aux. ont. (rt.side mtg)…………………CR3O5X200B
1 st NO-NC aux. ont.for (rt.side mtg)……CR3O5X200C
Additional NO aux. ont. for all forms……CR3O5X100D
Additional NC aux. ont. for all forms ….CR3O5X100E
Pushbutton………………………………………………….. CR305X220N
Sele tor swit h, H—O—A. …………………………CR305X230N
Sele tor swit h, OFF—ON. ……………………… CR305X230D
Indi ating light. ………………………………………… CR305X250N
Fifth pole.(for adding to
4-pole form only)………………………………………. CR3O5X211B
Control ir uit fuse……………………………………. CR305X241A, B, C, D
*** Coil Data
For three-pole devi e, order Catalog Number
15D22G plus number in table below.
Frequen y 115V 200/
208V 230V 460V 575V 600V
60Hz 002 023 003 004 005 006
Frequen y 110V 220V 380V 440V 550V 600V
50Hz 007 008 064 009 010 011
*** Add suffix numbers for parti ular oil rating required. See COIL TABLE above
General Ele tri Company
41 Woodford Avenue, Plainville, CT 06062
GEH-4776B 08/10, 10-2049 © 2010 General Ele tri
Visit us on the web at www.Geindustrial. om
1.
Perform steps 1 through 5
under “Coil Removal”.
2. Remove magnet from
molded over and movable
arm.
3. Remove return spring from
enter of movable arm.
4. Remove molded over from
movable arm.
5. Depress and slide movable
onta t, spring, and spring
seat from movable arm.
6. Remove s rews holding
stationary onta ts in pla e
and remove stationary
onta ts
PRINCIPAL RENE AL PARTS
Use 022 for 120V, 60 Hertz/110V, 50Hertz oil.
7.
Reassemble devi e by reversing
pro edure.
NOTE:
Do not attempt to remove or repla e
ar traps in ar hute over.
When reassembling, note that the ar
hute over will only fit one way and is
marked “TOP” in upper right hand orner.
Magnet and movable arm will fit either way
but will be quieter if reassembled the same
way they were taken apart.