ABB XT4LU3250AFL000XXX Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Quantity
ABB XT4LU3250AFL000XXX - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built to handle substantial electrical loads, this 250-amp Tmax XT4 frame breaker utilizes fixed thermal and magnetic trip elements for straightforward protection. The unit installs into ReliaGear neXT panelboards and serves as a modern replacement for legacy T4L250TW models when paired with the proper retrofit kit. Delivering an impressive 200kAIC interrupting capacity at 240VAC, this current-limiting device safeguards critical industrial infrastructure against severe short circuits.Specifications
| Brand | ABB |
|---|---|
| Series | XT4 |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC, 600VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC, 85kA @ 250VDC, 75kA @ 600VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | ABB ReliaGear neXT Panelboards, ABB ReliaGear SB Switchboards |
| Wire Gauge | 3/0 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Handle Lock, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CE, CSA, cULus, IEC, KEMA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed, Current Limiting |
Product FAQs
8 answersWhat panelboards and switchboards is the XT4LU3250AFL000XXX designed for?
This breaker integrates directly into ABB ReliaGear neXT panelboards and ABB ReliaGear SB switchboards. The Tmax XT series serves as the core breaker platform for these modular distribution systems.
What wire sizes and materials are accepted by the lugs on this breaker?
The factory-installed lugs accept copper (Cu) or aluminum (Al) conductors ranging from 3/0 AWG to 350 kcmil. Ensure you use the proper torque specifications outlined in the installation manual when terminating the wires.
What does the L in the XT4LU3250AFL000XXX part number indicate?
In the ABB Tmax XT nomenclature, the L designates the interrupting rating tier. For this XT4 frame, it signifies an extra-high interrupting capacity, delivering up to 200kA at 240VAC and 100kA at 480VAC.
What type of trip unit is included with this 250A breaker?
It features a fixed thermal and fixed magnetic trip unit with LI functions. This provides non-adjustable Long-Time (thermal) and Instantaneous (magnetic) overcurrent protection for standard power distribution applications.
Does this breaker come with lugs installed?
Yes, this model includes factory-installed front terminal lugs. You do not need to purchase a separate lug kit for standard 3/0 AWG to 350 kcmil wire terminations.
Can this breaker be used in DC power applications?
Yes, in addition to AC ratings, this breaker is certified for DC applications. It offers interrupting capacities of 85kA at 250VDC and 75kA at 600VDC, making it suitable for specialized industrial or renewable energy systems.
How does the breaker mount into ReliaGear neXT panelboards?
It is a unit-mount breaker. When installed in ReliaGear neXT systems, it utilizes a specialized plug-in line-side connector assembly and mounting bracket that engages the vertical bus, eliminating the need for complex strap kits.
Are there any specific ventilation requirements when installing this breaker?
Yes, when installing this breaker in an enclosure, ensure that panelboard accessories or wiring do not block the breaker arc vents or enclosure ventilation openings to maintain safe operation and proper heat dissipation.
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