ABB XT4NU3225BY8000XXX Molded Case Circuit Breaker
- 225A
- 3 Pole
- Unit Mount
ABB
XT4NU3225BY8000XXX
Molded Case Circuit Breaker
Brand
ABB
SKU
XT4NU3225BY8000XXX
Quantity
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ABB XT4NU3225BY8000XXX - 225A 3 Pole Molded Case Circuit Breaker
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Description
Serving as a replacement for the legacy T4N250TW (with retrofit kit), this 225A MCCB is part of the ABB SACE Tmax XT4 series. It is engineered for reliable power distribution in commercial settings. The breaker is fully compatible with ABB ReliaGear neXT panelboards and SB switchboards. Equipped with an adjustable thermal and magnetic (TMA) trip unit, it provides a 65kA rating at 240VAC. The current-limiting design features double insulation, positive operation, and reverse feed capabilities.Specifications
| Brand | ABB |
|---|---|
| Series | XT4 |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC, 600VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480VAC, 18kA @ 600Y/347VAC, 35kA @ 250VDC, 35kA @ 600VDC |
| Amperage Range | 158-225A |
|---|
| Frame Type | XT4N |
|---|---|
| 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 | Adjustable Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Motor Operator |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CCC, CSA, cULus, IEC, KEMA, RINA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed, Double Insulation, Positive Operation |
Product FAQs
7 answersWhich panelboards are compatible with the XT4NU3225BY8000XXX breaker?
This breaker is designed for integration into ABB ReliaGear neXT Panelboards and ABB ReliaGear SB Switchboards.
Can the XT4NU3225BY8000XXX be used in DC electrical systems?
Yes, this breaker is rated for DC applications, providing up to 35kA interrupting capacity at both 250VDC and 600VDC. When installing in DC systems, proper series wiring of the poles is required based on the system voltage.
What wire sizes are accepted by the lugs on this XT4 breaker?
The included lugs accept copper (Cu) or aluminum (Al) conductors ranging from 3/0 AWG to 350 kcmil. Ensure conductors are torqued to the specifications printed directly on the terminal body to prevent local heating.
What does the N in the XT4N frame designation signify?
The N indicates that this is the Normal interrupting capacity version of the SACE Tmax XT4 frame, which provides a 25kA interrupting rating at 480VAC and 65kA at 240VAC.
How are the thermal and magnetic trip settings adjusted on this breaker?
The thermal and magnetic trip thresholds are adjusted using the rotary dials located on the front face of the trip unit. This allows panel builders to fine-tune the long-time and instantaneous protection to match specific load requirements.
What are the safety requirements for terminating cables to the XT4NU3225BY8000XXX?
Always tighten the conductors to the exact torque values printed on the terminal body. Improper torque can cause local heating near the circuit breaker terminals, premature aging of the cable insulation, and potential fire hazards.
How is the XT4NU3225BY8000XXX mounted in an electrical enclosure?
This is a unit mount circuit breaker, meaning it is bolted directly to the mounting pan or chassis rather than plugging onto a busbar. It is secured using standard breaker mounting hardware.
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