Designed for demanding loads, the Square D KH36110 is a 3-pole, 110A molded case circuit breaker. It utilizes a thermal-magnetic trip mechanism for precise LI protection. Featuring an I-Line plug-on connection, it ensures a secure fit into Square D panelboards. This legacy K-Frame model is replaced by the PowerPact HGA36110. Capable of handling up to 600VAC, it boasts an interrupting capacity of 35kAIC at 480V. The HACR-rated construction guarantees reliable performance.
CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489
Approval
CSA, UL
Temp Rating
40C
Construction Features
HACR Rated, High Interrupting Capacity
Product FAQs
7 answers
What panelboards are compatible with the KH36110 circuit breaker?
This breaker is specifically designed for installation in Square D I-Line panelboards and switchboards. It utilizes an I-Line style plug-in connection to mount directly to the bus stack.
What wire sizes and materials are supported by the standard lugs on the KH36110?
The factory lugs accommodate wire sizes ranging from 4 AWG to 350 kcmil and are rated for both aluminum and copper conductors, providing flexibility for various feeder sizes.
How does the adjustable magnetic trip function on this K-Frame breaker?
The KH36110 features a thermal-magnetic trip unit with fixed thermal protection for overloads and an adjustable magnetic dial. This allows electricians to adjust the instantaneous trip threshold to coordinate with downstream devices and handle specific inrush currents.
What does the LI trip function indicate on the KH36110?
The LI code specifies that the breaker provides Long-Time (L) thermal protection against sustained overloads and Instantaneous (I) magnetic protection against short circuits.
Is the KH36110 still in active production, or is there a modern replacement?
The KH36110 is a legacy K-Frame MCCB. While it remains widely available for maintaining existing I-Line panels, Square D has transitioned to the PowerPact H-Frame series for modern I-Line applications requiring similar amperage and interrupting capacity.
How is the KH36110 secured to the panelboard bus?
The breaker uses the Square D I-Line plug-on jaw mechanism, which engages directly with the panelboard bus stack. This design eliminates the need for bolted bus connections and speeds up installation.
Can the KH36110 be utilized in direct current systems?
Yes, in addition to its 600VAC rating, this breaker is rated for 250VDC applications and provides a 10kA interrupting capacity at that DC voltage.
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Review summary
Customers rate this product 5.0 out of 5 based on 1 review.