Designed for versatile power management, the XT5NU330ABYN000XXX is a 3-pole, 300A molded case circuit breaker. It belongs to the SACE Tmax XT5N family, offering reliable operation for commercial, industrial, and marine applications. This unit-mount breaker installs into ABB ReliaGear neXT panelboards, SB switchboards, and Tmax XT enclosures. With the appropriate retrofit kit, it serves as an upgrade path for discontinued Tmax T5 and Spectra Series breakers, providing precise LI protection.
What equipment is compatible with the XT5NU330ABYN000XXX breaker?
This unit mount breaker is designed for installation in ABB ReliaGear neXT Panelboards, ABB ReliaGear SB Switchboards, and ABB SACE Tmax XT Enclosures.
What does the N in the XT5N frame designation signify?
The N denotes the Normal interrupting capacity tier within the ABB SACE Tmax XT5 family, which provides a 35kA interrupting rating at 480VAC.
How does the adjustable thermal magnetic trip unit function on this model?
The LI (Long-Time, Instantaneous) trip unit allows users to independently adjust both the thermal overload threshold and the magnetic short-circuit pickup to coordinate with specific system requirements.
What wire size range do the factory lugs accept?
The standard lugs on this breaker accommodate two conductors per phase, accepting wire sizes ranging from 2/0 AWG to 500 kcmil.
Can this thermal magnetic breaker be used in DC circuits?
Yes, unlike breakers with standard electronic trip units, this thermal magnetic model is rated for DC applications up to 600VDC with a 16kA interrupting capacity.
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