GE 300 Series Instruction page 2

In this condition there should be continuity
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
Maintenance
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.
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 exposed. Do Not File the
contacts. Filing or dressing the contacts only
results in lost tip material and reduces life.
5. The ultimate tripping current of the installed
relay heater can be adjusted ± 10% by using
the adjustment dial, shown in Figure 1.
Ref.No
Figure.4
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 four poles:
NEMA Size 0
NEMA Size 1
5 Molded cover for stationary and movable contacts
6 Return spring for movable contact support
7 Molded movable contact support for 2-, 3-, 4- pole
8 Armature and frame (magnet)
9 Operating coil
10 Spring retainer for armature
11 Overload relay for 2-speed single-winding controller (1 NC contact)
12 Overload relay for 2-speed single-winding controller (1 NO-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.
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.
6. On reversing and two-speed starters, the
mechanical interlock has been factory adjusted and
normally should never have to be readjusted. If
readjustment is ever needed, these steps should be
followed:
A. 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.
D. 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.
Caution: Before adjusting or operating reverser,
make sure the mechanical interlock arm is
engaged with movable contact arm.
Principal Renewal Parts
Description
General Electric Company
41 Woodford Avenue, Plainville, CT 06062
GEH-5193B 08/10, 10-2049 © 2010 General Electric
Visit us on the web at www.Geindustrial.com
(Order 15D21G plus coil suffix number below)
115- 200-
60 Hertz
120V 208V
50 Hertz 110 -----
Coil Suffix 002 023
Accessory Kits
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...........................................................
Selector switch, H—O—A. .............................. CR305X130N
Selector switch, OFF—ON. ...........................
Indicating light. ................................................
Fifth pole. ............................................................
Control circuit fuse......................................... CR305X141A, B, C, D
Catalog
CR307/CR308/
Number
CR387
546A301G050 2
CR324C310F 1
CR324C360F 1
--------------- -
546A300G002 1
546A301G053 1
188D711P001 1
541A278P001 1
187D350P001 1
546A301G054 1
15D21G*** 1
546A588P001 1
CR324C310G -
CR324C360G -
***Coil Suffix Table
230- 460- 575-
----
240V 480V 600V
220V 380V 440V 550V
003 064 004 005
CR305X120N
CR305X130P
CR305X150N
CR3O5X111B
Quantity Required
CR301/CR311/CR390
Left Cont.. Right Cont.
2 2
1+ ++
1+ ++
- -
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 -
1 -