ABB XT4LU3250FY8000XXX Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
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ABB XT4LU3250FY8000XXX - 250A 3 Pole Molded Case Circuit Breaker
New
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Description
Engineered for high-capacity industrial applications, the XT4LU3250FY8000XXX serves as a 250A, 3-pole molded case circuit breaker from ABB's SACE Tmax XT4 family. It installs into ReliaGear neXT panelboards and ReliaGear SB switchboards, acting as a modern replacement for legacy T4L250TW breakers. Rated for a powerful 100kAIC at 480VAC, this unit utilizes an Ekip Dip LSI trip unit, allowing facility managers to adjust long-time, short-time, and instantaneous settings.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 |
| Amperage Range | 100-250A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | ABB ReliaGear neXT Panelboards, ReliaGear SB Switchboards |
| Wire Gauge | 3/0 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Lugs Not Included, Mounting Hardware |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CSA, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | Current Limiting, HACR Rated, Reverse Feed |
Product FAQs
6 answersWhich panelboards are compatible with the XT4LU3250FY8000XXX circuit breaker?
This XT4 frame breaker is specifically designed for use with ABB ReliaGear neXT Panelboards and ReliaGear SB Switchboards.
What protection settings can be configured on the LSI electronic trip unit?
The LSI electronic trip unit allows panel builders to adjust the Long-Time (overload protection), Short-Time (delayed short circuit protection for selective coordination), and Instantaneous (immediate short circuit) pickup points.
What does the "L" designation in the XT4L frame catalog number represent?
The "L" indicates the interrupting capacity tier. For this Tmax XT4 breaker, it signifies an extra-high fault rating of 100kA at 480VAC and 200kA at 240VAC.
What conductor sizes and materials are supported by the standard lugs?
The factory lugs are rated for both copper and aluminum (Cu/Al) conductors, accepting wire sizes ranging from 3/0 AWG up to 350 kcmil.
Why is the Short-Time function on this breaker important for system safety?
The Short-Time delay function enables selective coordination in power distribution systems. By intentionally delaying the trip during a moderate fault, it allows a downstream breaker closer to the fault to trip first, isolating the problem and preventing unnecessary power loss to other critical circuits.
Does this breaker use traditional thermal-magnetic trip technology?
No, the XT4LU3250FY8000XXX utilizes a microprocessor-based electronic trip unit. This design provides tighter trip tolerances and highly adjustable time-current curves for precise coordination compared to fixed thermal-magnetic models.
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