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29
December 2004
Technical Data and Specifications
Product Description
Type C371 Circuit Breaker Operating
Mechanisms are designed for installa-
tion in control enclosures with a right
hand flange and where main or branch
circuit protective devices are required.
Auxiliary contacts are not available for
mounting on operating mechanism.
Where required, have them installed in
circuit breaker.
Table 32. Flange Mounted Fixed Depth Operating Mechanisms for Circuit Breaker
Circuit or
Motor Circuit
Protector
Frame
Size
Variable Depth
Mounting
Range
Min./Max.
(Inches)
Operating Mechanism With 4 Inch Handle
For NEMA 1 or 12 Enclosure
Catalogue Number
HMCP, EHD, FDB, FD, FDC, HFD 150 6-1/2 C371FE1
HMCP, HJD, JD, JDB, JDC
HMCP, DK, HKD, KD, KDB
250
400
7 C371FF1
Mounting Dimension Requirements
Dimension A = 0.75 in. plus the required wire bending spacing selected from
Article 430-10 of the National Electrical Code.
Dimension B = Minimum or maximum depth from inside of flange holding
operating handle to panel where Circuit Breaker is mounted.
(variable depth, see page 22)
Dimension C = 150 Ampere Size – 0.67 in.
250 Ampere Size – 0.625 in.
400 Ampere Size – 0.187 in.
600 Ampere Size – 1.71 in.
800 – 1200 Ampere Size – 5.17 in.8
Circuit Breaker Operating Mechanisms
Flange – Variable Depth, Flange Mounted – Fixed Depth