Coil Replacement
(cont.)
Magnet Suspension
- refer to Figure 1
Kickout Springs
- refer to Figure 1
Contactor Rating
Main Contact Kit
and Pole Combination
Part Number
300 Amp 2-Pole
CLMGCK02
300 Amp 3-Pole
CLMGCK03
400 Amp 2-Pole
CLMHCK02
400 Amp 3-Pole
CLMHCK03
Item
Cat./Part Number
Coil-Clearing Auxiliary Contact
CLMHCCK11
Auxiliary Contact 1 NO 1 NC
CLMFCAK11
Auxiliary Contact 2 NO 0 NC
CLMFCAK20
Auxiliary Contact 0 NO 2 NC
CLMFCAK02
•
Voltage
300
600
10,000
400
300
400
600
10,000
Table 5 Renewal Parts
contacts (18). (A 1/4 inch Allen wrench is required for
the 5/16 inch socket head cap screws.) To install the
new contacts reverse the procedure, using the torque
table, Table 2. Raise the crossbar into its proper
position with the moving contacts inside the arc chute.
Install the arc chute, making sure the arc chute bolts are
tight. Check to be sure both the kickout (6) and contact
springs (17) are properly seated and the nameplate is in
place. The moving contacts should touch the stationary
contacts at the same instant within 1 /16 inch maximum
error on all poles as the contactor is closed. Contact
face misalignment of approximately 1/16 inch (mea-
sure with the contactor fully closed) will not be detri-
mental to the operation of the contactor.
Fig. 9 Spring Length Measurement
Fig. 10 Spring Length Measurement
Both the stationary magnet and moving magnet assem-
blies are flexibly mounted to ensure proper sealing of
the magnet. Both helical compression and flat leaf
springs are in back of each magnet part The moving
armature has less spring force and restraint than the
stiffer stationary magnet assembly. In case these mag-
nets are ever disassembled, particular care must be
used to make sure that the flat leaf springs are
centered on the laminated magnet assemblies and are
not jammed between the magnets and the molded
guide projections. After reassembly, be sure to check
that both the stationary and moving magnets can be
manually depressed or rocked in their mountings.
Normally no maintenance is required for the kickout
springs (6) other than to make sure they are properly
seated on the molded crossbar assembly. In case
they are inadvertantly removed from the molded base
where they are captivated in a hole slightly smaller
than the free spring diameter, they can be reinstalled
with a needle-nosed plier. Hold the front end of the
spring, insert the pliers inside the spring and rotate the
offset pin end of the spring in a direction to decrease
its outside diameter. Keep the spring restrained until
the pin end has been inserted into the molded base.
Thin Paper Feeler Folded
Under Moving Contact
Mounting
Surface
Stationary
Contact
Moving
Contact
Initial
Length
Scale
Thin Paper
Feeler
"Power Off”Armature
Fully Held
Closed Manually
Contact Spring
Stationary
Contact
Thin Paper
Feeler
Contact
Overtravel
Initial
Spring Length
Final
Spring Length
=
-
Final
Length
Moving
Contact
Table 6 - Circuit Ratings
Contactor
Amp.
Rating
Short-Circuit
Protective Device
(SCPD)
Short-Circuit Current
RMS Symmetrical
Amperes
Max. Amp.
Rating of
SCPD
Circuit breaker
Circuit breaker
7
Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092
A5E49381767A
