Engineered for industrial applications, the ABB XT4LU3250BFF000XXX is a 3-pole, 250A molded case circuit breaker from the SACE Tmax XT family. It installs into ReliaGear neXT panelboards and SB switchboards, serving as a replacement for legacy T4L250 breakers. Featuring an adjustable thermal-magnetic trip unit, it delivers a 100kAIC rating at 480VAC. The breaker is HACR rated, current limiting, and supports reverse feed. Lugs are not included.
HACR Rated, Current Limiting, Reverse Feed, Trip-Free Mechanism, Quick-Make/Quick-Break
Product FAQs
7 answers
What does the L in the XT4LU3250BFF000XXX part number signify?
The L designates the interrupting capacity tier of the breaker. For the XT4 frame, the L tier provides a high interrupting rating of 100kAIC at 480VAC and 200kAIC at 240VAC.
Is the ABB XT4LU3250BFF000XXX rated for DC applications?
Yes, this breaker is rated for DC systems up to 600VDC. It provides an interrupting rating of 85kAIC at 250VDC and 75kAIC at 600VDC, making it suitable for industrial DC applications.
Is the XT4LU3250BFF000XXX HACR rated?
Yes, this breaker is HACR rated, making it suitable for heating, air conditioning, and refrigeration equipment. It is also current limiting and supports reverse feed applications.
How is the trip unit adjusted on the XT4LU3250BFF000XXX?
This breaker features a Thermal Magnetic Adjustable (TMA) trip unit. It includes dials on the front face to adjust the thermal protection for overloads and the magnetic protection for instantaneous short-circuits. The magnetic trip is adjustable from 1250A to 2500A.
What wire size do the standard lugs on this 250A XT4 breaker accept?
Standard ABB XT4 250A lug kits typically accept wire sizes from 3/0 AWG to 350 kcmil for both copper and aluminum conductors. Ensure you verify the specific lug kit installed, as variations exist.
Which panelboards are compatible with the XT4LU3250BFF000XXX?
This breaker is designed for use in ABB ReliaGear neXT panelboards, ReliaGear SB switchboards, and SACE Tmax XT enclosures.
Can the XT4LU3250BFF000XXX replace older GE circuit breakers?
Yes, following the ABB acquisition of GE Industrial Solutions, the SACE Tmax XT series serves as the direct replacement path for legacy GE breakers, including the T4L250 series.
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