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SQUARE D Mechanical Interlock: Mechanical Interlock (MPN S29369) - Square D Circuit Breaker Locks, Padlocks & Interlocks
SQUARE DSquare D Circuit Breaker Locks, Padlocks & Interlocks

SQUARE D Mechanical Interlock: Mechanical Interlock (MPN S29369)

The SQUARE D Mechanical Interlock (MPN S29369) is a circuit breaker accessory designed for use with Square D PowerPact H and J Frame Circuit Breakers. This mechanical interlock accessory provides a physical locking…

SKU 3G-OTH-20894

Brand
SQUARE D
Item
Mechanical Interlock: Mechanical Interlock
Category
Square D Circuit Breaker Locks, Padlocks & Interlocks
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Technical Specifications

SQUARE D
Manufacturer Part Number
S29369
For Use With
Square D PowerPact(R) H and J Frame Circuit Breakers
Accessory Type
Mechanical Interlock
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SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SQUARE D Mechanical Interlock (MPN S29369) is a circuit breaker accessory designed for use with Square D PowerPact H and J Frame Circuit Breakers. This mechanical interlock accessory provides a physical locking mechanism between two circuit breakers to prevent simultaneous operation.

Frequently Asked Questions

What is the SQUARE D S29369 mechanical interlock used for?

The SQUARE D S29369 mechanical interlock is a circuit breaker accessory that physically locks two Square D PowerPact H or J Frame circuit breakers to prevent simultaneous operation. It is commonly used in industrial power distribution systems where interlocking ensures safe load transfer or backup power switching.

What are the specifications of the SQUARE D S29369 mechanical interlock?

The SQUARE D S29369 is a mechanical interlock accessory designed for use with Square D PowerPact H and J Frame circuit breakers. It provides a physical locking mechanism between two breakers. The brand is SQUARE D, and the accessory type is mechanical interlock. No additional electrical ratings are specified.

Where to buy the SQUARE D S29369 mechanical interlock worldwide?

3G Electric supplies the SQUARE D S29369 mechanical interlock worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We source and deliver this accessory for Square D PowerPact H and J Frame breakers.

How to install the SQUARE D S29369 mechanical interlock?

Install the SQUARE D S29369 mechanical interlock by mounting it between two Square D PowerPact H or J Frame circuit breakers according to the manufacturer's instructions. Ensure the breakers are in the OFF position and de-energized. The interlock physically prevents both breakers from being ON simultaneously. Always follow standard electrical safety practices.

Used in

Common applications for SQUARE D
Commercial building electrical panels — Square D QO series plug-in circuit breakers for branch circuit protection
Industrial motor control centers — Square D QOB series bolt-on breakers in NQOD panelboards
Heating equipment installations — Square D QOU series unit-mount breakers for overcurrent protection
Outdoor electrical distribution — Square D L-Frame enclosures housing LAL/LHL breakers for 400 A service
Indoor facility power distribution — Square D Q-Frame enclosures with QBL/QDL breakers for 225 A circuits
Retrofit and replacement in existing Square D load centers — QO series breakers for 120/240V AC systems

SQUARE D Products

3G Electric supplies SQUARE D square d circuit breaker locks, padlocks & interlocks. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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