Built for heavy-duty power distribution, the Square D KAL26150 delivers dependable long-time and instantaneous (LI) protection for commercial and industrial electrical systems. This 2-pole, 150A molded case circuit breaker utilizes thermal-magnetic trip technology for robust fault clearing. This unit mount breaker fits into compatible Square D enclosures, motor control centers, and switchboards.
This unit-mount K-frame breaker is designed for installation in legacy Square D enclosures, switchboards, and motor control centers. It requires a lug-to-lug feed-thru connection and is not designed for plug-on busbar systems.
What is the magnetic trip adjustment range for the KAL26150?
The adjustable magnetic trip on this 150A breaker can be set between 750A on the low setting and 1500A on the high setting.
Is the KAL26150 suitable for DC power systems?
Yes, this thermal-magnetic breaker is rated for use in DC applications up to 250VDC, where it provides a 10kA interrupting capacity.
What wire sizes and materials are accepted by the factory lugs?
The standard lugs on the KAL26150 accept 4 AWG to 350 kcmil aluminum or copper conductors. Ensure proper torque specifications are followed during installation.
What is the modern replacement for the legacy KAL26150 breaker?
The KAL26150 is a legacy K-frame breaker. Square D has replaced this series with the PowerPact H-frame. The HGL26150 is a common unit-mount replacement that meets or exceeds the original interrupting capacity.
What is the difference between the KAL26150 and KHL26150 breakers?
Both are 150A, 2-pole K-frame breakers, but they have different interrupting capacities. The KAL26150 is the standard version with a 25kA rating at 480VAC, while the KHL26150 is the high-interrupting version rated for 35kA at 480VAC.
What safety precautions are required when adjusting the magnetic trip settings?
Always de-energize the breaker and follow standard lockout/tagout procedures before adjusting the magnetic trip dial. Adjustments should only be made by qualified personnel to ensure the instantaneous trip threshold matches the connected load requirements.
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Customers rate this product 5.0 out of 5 based on 3 reviews.