9421LF1 SQUARE D, 9421LF1 Datasheet - Page 34
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9421LF1
Manufacturer Part Number
9421LF1
Description
CIRCUIT BREAKERS, ACCESSORIES
Manufacturer
SQUARE D
Datasheet
1.9422ATCF331.pdf
(44 pages)
34
NEMA-Style Flange Handle
Disconnect Switch
Circuit Breaker
Mechanism
Class 9423 Door-Closing Mechanisms
Class 9423 door-closing mechanisms may be used on enclosures with door openings up to 91 inches.
The door closing mechanisms are designed to be used on control enclosures and interlocked with a
Class 9422 disconnect device, although they all can be used independently. Three different systems are
available and their use is as recommended below. A complete system is available for interlocking all the
doors of a multi-door enclosure with the master door when using the 6" or 8" vault handle mechanism.
Note that the “Master Door” is defined to be the door of a single or multi-door enclosure which is inter-
locked directly with the disconnect device. The master door can be hinged on either the right or left hand
side. It can be located in any position on a multi-door enclosure. The “Auxiliary Door” is defined to be
the remaining door(s) of a multi-door enclosure which is (are) interlocked with the master door by means
of the overhead interlocking system as illustrated on the next two pages.
Selection Procedure
Step 1. Determine enclosure construction (number of doors, door height, hinge location, etc.).
Step 2. Determine Class 9422 disconnect device to be used – either a disconnect switch or a circuit
Step 3. Determine the location of disconnect device and handle mechanism (right- or left-hand flange or
Step 4. Select the door closing mechanism required:
Step 5. Select auxiliary door closing mechanisms and multi-door interlocking hardware, if required. (A
breaker mechanism (see examples of these devices to the left).
center channel).
complete system for interlocking all auxiliary doors of a multi-door enclosure with center channel is
available for the medium and large enclosures.)
60" Maximum Door
(Recommended)
Opening
© 1997 Square D All Rights Reserved
Door Depths
is Standard
is Available
for Three
• A Third
Latch Kit
• For
• 2 Point
Locking
Locking
Roller
Point
3
/
4
"
Door Closing Mechanism
(Recommended)
46-60" Door
Opening
Door Depths
Mechansim
Enclosures
or Left Side
Multi-Door
• Use with
• Referred
Single or
• Use on
• For
on Right
Hinged
Handle
Doors
the 6"
Vault
to as
3
/
4
"
(Recommended)
61-91" Door
Opening
Door Depths
Mechansim
or Left Side
Enclosures
Multi-Door
• For 1-
• Use with
• Referred
Single or
• Use on
on Right
Hinged
Handle
Doors
the 8"
to as
Vault
12/97
1
/
8
"