Square D Digest 179

Door Mounted

Operating Mechanisms for Circuit Breakers

Class 9421 / Refer to Catalog 9420CT9701

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8 OPERATING MECHANISMS AND DISCONNECT SWITCHES

Dimensions for Type L Operating Mechanisms

Panel Drilling for PowerPacT TM H and J Circuit Breaker Operating Mechanisms: 9421LJ1, 9421LJ4, and 9421LJ7

Panel Drilling for PowerPacT TM D and L Circuit Breaker Operating Mechanisms: 9421LD1, 9421LD4, and 9421LD7

Panel Drilling for PowerPacT TM M and P Circuit Breaker Operating Mechanisms: 9421LW1, 9421LW4, and 9421LW7

Table 8.92: Shaft Cutting Dimensions Class Type Shaft Length Formula

H = Long Shaft

H = Standard Shaft

Min. 5.5 (138) 7.25 (184) 7.19 (183)

Max. 10.75 (273) 12.06 (306) 11.63 (295)

Min. 5.5 (138) 7.25 (184) 7.19 (183)

Max. 21.63 (543) 22.63 (575) 22.25 (565)

LJ1, LJ4, LJ7 L = H – 3.00 (76)

9421

LD1, LD4, LD7 L = H – 4.25 (108)

9421

LW1, LW4, LW7 L = H – 4.89 (124)

9421

8-40

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