A reliable solution for high-fault environments, the Square D KIL36150 provides robust current-limiting protection in a 150A package. This three-pole unit utilizes thermal-magnetic trip units with adjustable magnetic settings to defend commercial and industrial circuits. It mounts into Square D switchboards, enclosures, and motor control centers, offering an impressive 200kAIC rating at 480V. As a legacy K-frame component, it is replaced by the JRL36150 for new installations.
What types of panels and enclosures is the Square D KIL36150 compatible with?
The KIL36150 is a unit-mount, feed-thru circuit breaker designed for use in compatible Square D enclosures, switchboards, and motor control centers. Because it is a unit-mount breaker, it bolts directly to the backpan or mounting surface and does not plug into I-Line panelboard busbars.
What does the I in the KIL frame designation indicate?
The I indicates that this is an I-Limiter current-limiting circuit breaker. It is engineered to interrupt massive fault currents and restrict let-through energy, providing a high interrupting rating of up to 200kAIC at 480V to protect downstream equipment from thermal and magnetic stress.
How does the LI trip unit on the KIL36150 function?
The LI designation stands for Long-Time and Instantaneous trip functions. It features a fixed thermal element for standard overload protection and an adjustable magnetic element, allowing you to tune the instantaneous short-circuit trip threshold to accommodate specific inrush currents without nuisance tripping.
Is the Square D KIL36150 still in active production?
The KIL36150 is part of Square D's legacy K-Frame series and is no longer manufactured for new designs. While it remains available for maintaining existing legacy systems, new installations typically require the modern PowerPact J-Frame equivalent, such as the JRL36150.
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