Disconnect Switches Product Guide

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December 2004

Circuit Breaker Operating Mechanisms

Flange Mounted – Fixed Depth

Product Description

Type C371 Circuit Breaker Operating

Mechanisms are designed for installa-

tion in control enclosures where main

or branch circuit protective devices are

required. All circuit breaker mecha-

nisms are suitable for right hand

mounting.

Auxiliary contacts are not available for

mounting on operating mechanism.

Where required, have them installed in

circuit breaker.

Table 29. Operating Mechanisms for Circuit Breakers — Flange Mounted Variable Depth



For increased maximum allowable depth, see Connecting Rods below.



Dimensions shown are from panel ﬂange surface.

Table 30. Handle Only

Channel Support Kit –

Rod not supplied in Kit

For use to prevent bending of the operating handle mounting surface. This is especially

useful when the operating handle is mounted on a channel in a multi-door enclosure.

Kit included in 600 through 1200 ampere mechanisms. Catalogue Number C371CS6

Table 31. Connecting Rods

Increase Maximum Allowable Depth by 5 Inches

Circuit Breaker or

Motor Circuit

Protector

Frame

Size

Variable Depth

Mounting

Range

Min./Max.

(Inches)





Operating

Mechanism Only

– Does Not

Include Handle

Operating Mechanism With 4 Inch Handle & Rod

For NEMA 1-12 Enclosure For NEMA 4 Enclosure

Catalogue

Number

Catalogue Number Catalogue Number

HMCP, EHD, FDB, FD, FDC, HFD 150 6-1/2 to 16 C371E C371E1 C371E2

HMCP, HJD, JD, JDB, JDC

HMCP, DK, HKD, KD, KDB

250

400

6-1/2 to 16-5/8 C371F C371F5 C371F6

HLD, LD, LDC 600 8-1/2 to 22 C371G C371G5 C371G6

MD, MDS

HND, ND, NDC

800

1200

8-3/4 to 22

9-3/4 to 22

C371K C371K5 C371K6

Circuit Breaker

Frame Size

(Amperes)

NEMA

Enclosure

Type

Operating

Handle

Length

Catalogue

Number

150 1-3R-3-12

4 Inches

C371H1

C371H2

1-3R-3-12

6 Inches

C371H3

C371H4

250 thru

1200

1-3R-3-12

4 Inches

C371H5

C371H6

1-3R-3-12

6 Inches

C371H7

C371H8

Application Catalogue Number

Disconnect Switches

30 , 60, 100, 200 Ampere

Circuit Breakers

150, 250, 400 Ampere

C371CS1

Circuit Breakers

600, 800, 1200 Ampere

C371CS2

Complete Circuit Breaker

Operating Mechanism with

Operating Handle – C371E1

Handle Only – C371H1

Circuit Breakers

Motor Circuit Protectors

Operating Mechanisms

Listed Above

Operating Handle

For Safety Door Hardware – see Page 27