Featuring factory-installed accessories, the Square D JDL36225SA is a 3-pole, 225A molded case circuit breaker from the PowerPacT J-Frame line. It is engineered for commercial and industrial facilities requiring advanced control. This unit mount MCCB is designed for use within Square D switchboards, industrial control panels, and enclosures. The integrated 120VAC shunt trip enables remote tripping of the breaker for enhanced safety.
What does the SA suffix mean in the JDL36225SA catalog number?
The SA suffix indicates this breaker includes a factory-installed 120VAC shunt trip. This allows the breaker to be tripped remotely for emergency shutdown or control purposes.
What type of panels or enclosures accept the JDL36225SA breaker?
This unit mount breaker is designed for use in Square D industrial control panels, switchboards, and standalone enclosures. It is not designed for I-Line panelboards, which require a plug-on mounting style.
What precautions should be taken when terminating aluminum wire to the JDL36225SA lugs?
When terminating aluminum conductors in the 3/0 AWG to 350 kcmil range, you must apply an appropriate antioxidant compound to the stripped wire before insertion. Additionally, ensure the lugs are tightened to the manufacturer specified torque to prevent thermal expansion issues and overheating.
Is the magnetic trip adjustable on the JDL36225SA?
Yes, this thermal-magnetic breaker features a fixed thermal trip for overload protection and an adjustable magnetic trip for short-circuit protection. This allows you to fine-tune the instantaneous trip threshold to coordinate with other devices in your system.
Is the JDL36225SA suitable for battery systems or direct current control circuits?
Yes, this breaker is rated for DC applications up to 250VDC with a 20kA interrupting rating. When wiring for DC, ensure your system design accounts for proper arc suppression and polarity requirements.
How does the shunt trip function improve safety in an electrical system?
The integrated 120VAC shunt trip allows the breaker to be opened remotely via a push button, relay, or fire alarm system. This is critical for emergency power-off (EPO) applications, ensuring equipment can be de-energized quickly without personnel needing to access the panel directly.
Can the JDL36225SA be reverse fed?
Yes, this thermal-magnetic breaker is suitable for reverse-fed applications. This provides flexibility when routing conductors in tight enclosures or switchboards where bottom-feed wiring is preferred.
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