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Door-Mounted Operating Mechanisms For Square D™ Circuit Breakers
schneider-electric.us
Class 9421 / Refer to Catalog 9420CT9701
15
OPERATING MECHANISMS AND
DISCONNECT SWITCHES
Type L Circuit Breaker Mechanisms
Table 15.25: Electrical Interlock Kits—Class 9999
[1]
Description
Class
Type
Single-Pole, Double-Throw
9999 R47
Double-Pole, Double-Throw
9999 R48
Type L door-mounted, variable-depth operating mechanisms feature heavy duty, all
metal construction with trip indication. All can be padlocked in the Off position when the
enclosure door is open. Further, the handle assemblies can be locked Off with up to
three padlocks, which also locks the enclosure when the door is closed. (The 3” handle
accepts one padlock.) Complete kits are rated for NEMA Type 1, 3R, and 12 enclosures.
They include a handle assembly, operating mechanism, and shaft assembly.
Table 15.26: Complete Kits
For Use With Circuit Breakers
(Not Included in the Complete Kit)
Operating Mechanism
Standard 6 in. Handle
Operating Mechanism
Short 3 in. Handle
Standard Shaft Kit
Long Shaft Kit Long Shaft Kit
Circuit Breaker or
Interrupter Type
No. of
Poles
Frame Size
(A)
Type
Mounting Depth [2]
Range
Type
Mounting Depth [2]
Range
Type
Mounting Depth [2]
Range
GJL 3
75, 100
LG1 5-1/2 to 10-1/4 LG4 5-1/2 to 20-7/8 LG3 5-1/2 to 20-7/8
FAL, FCL, FHL
2–3 100 LN1 5-1/2 to 10-7/16 LN4 5-1/2 to 21 LN3 5-1/2 to 21
KAL, KCL, KHL
2–3 250 LP1 6-1/4 to 11-3/16 LP4 6-1/4 to 21-3/4 LP3 6-1/4 to 21-3/4
LAL [3], LHL [3], Q4L
2–3 400 LR1 6-5/16 to 10-7/8 LR4 6-5/16 to 21-1/2 LJ3 5-1/2 to 21-3/8
MEL, MXL
2–3 800
LT1 [4]
7-3/16 to 11-5/8
LT4 [4]
7-3/16 to 22-1/4
Not recommended.
MAL, MHL
2–3 1200
LT1 [4]
7-3/16 to 11-5/8
LT4 [4]
7-3/16 to 22-1/4
NAL, NCL, NEL, NXL
2–3 1200
LX1 [4]
8-1/4 to 12-3/4
LX4 [4]
8-1/4 to 23-3/8
NSF 2–3 250 9421LJ1 5.50–10.75 9421LJ4 5.50–21.38 9421LJ3 5.50–21.38
PowerPact D 2–3 600 9421LD1 7.25–12.06 9421LD4 7.25–22.63
3 in. handles are not recommended for use
with these circuit breakers.
Table 15.27: Component Parts
Use With
Handle Assemblies
NEMA 1, 3R, 12
Operating
Mechanism
(Lockout Included)
Standard Shaft
(Support Bracket Not Required)
Long Shaft
(Support Bracket Included)
3 in. Standard
Circuit Breaker or
Interrupter Type
No. of
Poles
Frame Size
(A)
Type Type Type
Mounting Depth [2]
Range
Type
Mounting Depth [2]
Range
Type
GJL 3
75, 100
LH3 LH6 LG7 5-1/2 to 10-7/16 LS8 5-1/2 to 21 LS13
FAL, FCL, FHL
2–3 100 LH3 LH6 LF1 5-1/2 to 10-7/16 LS8 5-1/2 to 21 LS12
KAL, KCL, KHL
2–3 250 LH3 LH6 LK1 6-1/4 to 11-3/16 LS8 6-1/4 to 21-3/4 LS12
LAL [3], LHL [3], Q4L
2–3 400
Not
recommended
LH6 LL1 6-5/16 to 10-7/8 LS8 6-5/16 to 21-1/2 LS10
MEL, MXL
2–3 800 LH8 LM1 7-3/16 to 11-5/8 LS8 7-3/16 to 22-1/4 LS10
MAL, MHL
2–3 1200 LH8 LM1 7-3/16 to 11-5/8 LS8 7-3/16 to 22-1/4 LS10
NAL, NCL, NEL, NXL
2–3 1200 LH8 LX7 8-1/4 to 12-3/4 LS8 8-1/4 to 23-3/8 LS10
NSF 2–3 250
9421LH3 [5] 9421LH6 [5]
9421LJ7 5.50–10.25 9421LS8 5.50–21.38 9421LS13
Table 15.28: NEMA Type 4 and 4X Handle Assemblies [6]
Use With Standard Handle Assemblies 3 in. Handle Version
Circuit Breaker or
Interrupter Type
No. of
Poles
Frame Size
(A)
NEMA 1, 3R, 4, 12
(Painted)
NEMA 1, 3R, 4, 4X, 12
(Chrome Plated)
NEMA 1, 3R, 4, 12 (Painted)
NEMA 1, 3R, 4, 4X, 12
(Chrome Plated)
Type Type Type Type
GJL 3 75 LH46 LC46 LH43 LC43
FAL, FCL, FHL
2–3 100 LH46 LC46 LH43 LC43
KAL, KCL, KHL
2–3 250 LH46 LC46 LH43 LC43
LAL, LHL, Q4L
2–3 400 LH46 LC46
Not recommended
MEL, MXL
2–3 800 LH48 LC48
MAL, MHL
2–3 1000 LH48 LC48
NAL, NCL, NEL, NXL
2–3 1200 LH48 LC48
Table 15.29: IEC Style Operating Mechanisms
Circuit Breaker or
Interrupter Type
Handle
Type 1, 4, 4X, 12
Operating Mechanism
(Lockout Included)
Extension Shafts
Mounting Depth
Type
Color
Type Type
Min. Max.
GJL
Red/Yellow
NW3 [7]
LG8
6-1/8 10-3/4 NS16
Black NW3B 6-1/8 17-7/8
NS336 [8]
Operating Mechanism
Operating Mechanism
(includes lockout)
3 in. Handle
Assembly
Standard Handle
Assembly
[1] Optional accessory for use with 9421L operating mechanisms. Not used with GJL, NAL, NCL, NEL, NXL, NSF, NSJ, PowerPact™ C, D, H, and J circuit breakers; use field-installed circuit
breaker interlocks instead.
[2] Mounting depth in inches, measured from the circuit breaker mounting surface (control panel) to the outside of the enclosure door.
[3] These operating mechanisms cannot be used with any LA/LH circuit breakers with an MB or MT suffix.
[4] Types LT1, LT4, LX1, and LX4 include an 8 in. handle rather than a 6 in. handle.
[5] For a red handle and yellow bezel, add suffix RY to catalog number, e.g., 9421LH6RY.
[6] Due to gasketing, NEMA Type 3 and 4 handle assemblies are not trip indicating.
[7] Obsolete.
[8] Contains support bracket.