GE GuardSwitch 300 Series User manual

Max.Hp
For AC Motors
Starter
Max
Current
Rating
Contactor
Max.
Current
Rating
AC
Volts Single-
Phase
Poly-
Phase
Size 0
115 1 -
2 - 3
23 2 3
18 amp
(open
and
enclosed)
2 amp
(open)
18amp
(enclosed) 46 —575
- 5
Size 1
115 2 -
2 - 7½
23 3 7½
27 amp
(open
and
enclosed)
3 amp
(open)
27amp
(enclosed) 46 —575
- 1
Note:
For starters with one or more
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
device. Remove return spring from center
of movable arm. Remove molded cover
and stationary contacts before lifting
movable arm from device.
Normally Closed
Contacts
The contacts may be converted from
normally open to normally closed with no
additional parts. Perform steps 1 through
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 spring seat against movable contact
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.
Check For Welded C
ontacts In
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
.
6.
Remove screws holding stationary
contacts in place and remove stationary
contacts.
. Reassemble device by reversing
procedure.
Combination
Magnetic Starters
CR30 -CR308, CR310-CR311, CR38 , CR390, CR40 -CR408
CR410-CR415, CR48 , CR490, CR492, CR494 Series
Motor branch circuit and control circuit
over-
current protection should be
supplied in accordance with the
National Electrical Code. CR3 5
contactors are suitable for use on a
circui
t capable of delivering not more
than 5, RMS symmetrical amperes,
6 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, RMS
symmetrical amperes.
Installation
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.
4.
Operate movable magnet and operating
arm by pressing on the nameplate to
assure free movement.
5. Mount on a sturdy vertical support.
6. Make the electrical connections.
. The starter overload relay may be reset
manually by depressing and releasing the
reset arm.
Coil Replacement
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.
. Reassemble device by reversing
procedure.
Contact Replacement
1. Perform steps 1 through 5 under
Coil Replacement.
2. Remove magnet f
rom 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
and spring from movable arm.
Instructions F
or
NEMA size 0 & 1
Supersedes GEH-4 93B
& GEH4 96B
GEH
-
5193 Instruction
CAUTION:
Bef
ore installing in a nuclear
application, determine that the product is
intended for such use.
WARNING
:
Disconnect power
before Installing or servicing.
Description
General Electric 3 /4 -Line full-
voltage
motor starters include a magnetic
contactor and a three-
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
overload relay is tripped .
Ratings
—
600 V Maximum
Figure1.Ty
pical 3 /4
-
Line magnetic starter
Figure2

60 Hertz 115-
120V
200-
208V
230-
240V ---- 460- 480V
575-
600V
50 Hertz 110 ----- 220V 380V 440V 550V
Coil Suffix 002 023 003 064 004 005
Quantity Require
CR301/CR311/CR390
Ref.No
Figure.4 Description Catalog Number CR307/CR308/
CR387
Left Cont..
Right Cont.
1
2
3
4
5
6
7
8
9
10
11
12
Coil retainer assembly
Overloa relay (3-heater, non-compensate form, 1 NC contact)
Overloa relay (3-heater, non-compensate , 1 NO-1 NC contacts)
Set of stationary an movable contacts with springs an screws for four poles:
NEMA Size 0
NEMA Size 1
Mol e cover for stationary an movable contacts
Return spring for movable contact support
Mol e movable contact support for 2-, 3-, 4- pole
Armature an frame (magnet)
Operating coil
Spring retainer for armature
Overloa relay for 2-spee single-win ing controller (1 NC contact)
Overloa relay for 2-spee single-win ing controller (1 NO-1 NC contact)
546A301G050
CR324C310F
CR324C360F
---------------
546A300G002
546A301G053
188D711P001
541A278P001
187D350P001
546A301G054
15D21G***
546A588P001
CR324C310G
CR324C360G
2
1
1
-
1
1
1
1
1
1
1
1
-
-
2
1+
1+
-
1
1
1
1
1
1
1
1
1
1
2
++
++
-
1
1
1
1
1
1
1
1
-
-
In this con ition there shoul be continuity
between the terminals. Depress white manual
check operator to trip the relay. In the trippe
con ition the circuit between the terminals
shoul be open in icating the contacts are
operating normally. Rewire the terminals an
reset the relay for normal operation
Maintenance
1. Always remove power from evice before
performing any maintenance.
2. Keep magnet mating surface free of
accumulate irt or ust.
3. Do Not Oil Or Grease the magnet mating
surfaces.
4. Contacts are carefully esigne for
maximum life. They nee only be replace
when nearly all the silver tip is gone an the
contact tip support is expose . Do Not File the
contacts. Filing or ressing the contacts only
results in lost tip material an re uces life.
5.
The ultimate tripping current of the installe
relay heater can be a juste ± 10% by using
the a justment ial, shown in Figure 1.
Caution:
Before adjusting or operating reverser,
make sure the mechanical interlock arm is
engaged with movable contact arm.
6.
On reversing an two
-
spee
starters, the
mechanical interlock has been factory a juste an
normally shoul never have to be rea juste . If
rea justment is ever nee e , these steps shoul be
followe :
A. Close one contactor by han by pushing own on
armature.
B. Using the other han , loosen the nut on opposite
contactor interlock arm an sli e it towar s the top
of the elongate slot until all gap is taken up
between the two arms. Follow the same proce ure
with the opposite contactor an interlock arm.
C. Best a justment is usually obtaine when both
mechanical interlock arm assemblies are as far up in
the elongate slot as possible.
D. With both arms a juste , there shoul be a very
slight gap (approximately 1/16- inch) between the
arms with both contactors open. Neither arm shoul
overlap the other with both contactors open.
***
Coil Suffix Table
(Or er 15D21G plus coil suffix number below)
Accessory its
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
A itional NO aux. cont. for all forms. . … CR3O5X100D
A itional NC aux. cont. for all forms . . .. CR3O5X100E
Pushbutton………………………………………………….. CR305X120N
Selector switch, H—O—A. ………………………… CR305X130N
Selector switch, OFF—ON. ……………………… CR305X130P
In icating light. ………………………………………… CR305X150N
Fifth pole. …………………………………………………… CR3O5X111B
Control circuit fuse………………………………….. CR305X141A, B, C, D
General Electric Company
41 Woo for Avenue, Plainville, CT 06062
GEH-5193B 08/10, 10-2049 © 2010 General Electric
Visit us on the web at www.Gein ustrial.com
Principal
Ren
ewal Parts
*** A coil suffix number from above table to complete the catalog number. Example: Cat. No. 15D21GO02 has ratings of 115—120V, 60 Hz an 11OV, 50 Hz.
+Omitte on 2-spee single-win ing controller.
++ Quantity one for multi-spee controller.
These instructions o not purport to cover all etails or variations in equipment not to provi e for every possible contingency to
be met in connection with installation, operation or maintenance. Shoul further information be esire or shoul particular
problems arise which are not covere sufficiently for the purchaser’s purpose, the matter shoul be referre to the GE Company.