Built for demanding industrial applications, the Square D KI36200 is a 3-pole, 200A thermal-magnetic circuit breaker with long-time and instantaneous trip functions. It installs into Square D I-Line panelboards and switchboards, utilizing a plug-on connection for efficient setup. Delivering a massive 200kAIC rating at 480VAC, this current-limiting breaker handles severe fault conditions. As a legacy K-frame device, it is commonly cross-referenced and replaced by the newer JRA36200 model.
What type of panelboards are compatible with the KI36200?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It utilizes a plug-on connection on the line side and mechanical lugs on the load side.
How does the I-Line mounting system work on this breaker?
The I-Line design allows the breaker to plug directly into the panelboard bus assembly for a fast, secure line-side connection. The load side uses traditional mechanical lugs that accept 4 AWG to 350 kcmil copper or aluminum conductors.
What does the adjustable magnetic trip function allow me to do?
The adjustable magnetic trip lets you tune the instantaneous short-circuit response to coordinate with other protective devices in your system. The thermal overload protection remains fixed.
Is the KI36200 a current or legacy breaker?
The KI36200 is a legacy K-frame molded case circuit breaker. For modern Square D installations, it is commonly cross-referenced and replaced by the PowerPact J-frame series, such as the JRA36200. Always verify that the replacement meets your required interrupting capacity.
Is the KI36200 a current-limiting circuit breaker?
Yes, the KI frame is designed as a current-limiting breaker. It provides a very high interrupting rating of 200kAIC at 480V, allowing it to quickly clear severe fault conditions in industrial power distribution systems.
Does the KI36200 use an electronic or thermal-magnetic trip unit?
It features a traditional thermal-magnetic trip unit with LI (Long-Time and Instantaneous) protection. It does not have an electronic Micrologic trip unit, which is typically found on newer or larger frame breakers.
What safety and testing standards does the KI36200 meet?
This breaker is UL Listed, CSA Certified, and CE Marked. It meets UL 489 and NEMA AB 1 standards for molded case circuit breakers in commercial and industrial applications.
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