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1SDX255190R1 ABB EPX-XT5S-E2-4003 400A 3-Pole 50kA Electronic LSI MCCB
ABB EPX-XT5S-E2-4003 is a 400 A three-pole moulded case circuit breaker with 50 kA breaking capacity and an Ekip Dip electronic LSI trip unit, designed for configurable overload, short-time and instantaneous short-circuit protection in low-voltage electrical distribution systems.
£1,938.03
Why Choose the ABB EPX-XT5S-E2-4003 400A 3-Pole 50kA MCCB?
The ABB EPX-XT5S-E2-4003 is a high-performance 400 A, 3-pole moulded case circuit breaker (MCCB) designed to deliver dependable overload and short-circuit protection in low-voltage electrical distribution systems. Featuring a 50 kA breaking capacity and an Ekip Dip electronic LSI trip unit, this circuit breaker provides advanced protection for commercial buildings, industrial facilities and electrical infrastructure.
As part of the ABB Protecta Power Devices range, the EPX-XT5S-E2-4003 incorporates proven ABB SACE Tmax XT5S400 circuit breaker technology. Its electronic protection system combines long-time overload protection, short-time delayed short-circuit protection and instantaneous short-circuit protection, helping safeguard electrical cables, distribution equipment and connected installations against damaging electrical faults.
With a 400 A rated current, three-pole configuration and 50 kA short-circuit breaking capacity, the EPX-XT5S-E2-4003 is suitable for higher-current three-phase distribution circuits requiring configurable electronic protection. Its compact XT5S400 construction and 140 mm three-pole width support integration into ABB Protecta Power distribution boards, electrical switchboards and compatible low-voltage switchgear assemblies.
Key Advantages
- 400 A rated current supports higher-current commercial and industrial electrical distribution applications.
- 50 kA breaking capacity provides high-level short-circuit protection at the applicable rated voltage.
- Three-pole construction provides coordinated protection and switching of three-phase electrical circuits.
- Ekip Dip electronic LSI trip unit provides configurable overload and short-circuit protection.
- Long-time (L) protection helps prevent conductor overheating and equipment damage caused by sustained overloads.
- Short-time (S) protection enables delayed short-circuit tripping to support protective device coordination.
- Instantaneous (I) protection provides rapid disconnection during severe short-circuit conditions.
- Electronic trip technology supports flexible protection settings and selective coordination within appropriately designed electrical systems.
- ABB SACE Tmax XT5S400 technology combines advanced electronic protection with robust moulded case construction.
- 140 mm three-pole width supports efficient use of space within compatible electrical distribution assemblies.
Key Features
- ABB Protecta Power Devices electronic trip moulded case circuit breaker.
- SACE Tmax XT5S400 circuit breaker platform.
- 400 A rated current for higher-current low-voltage electrical distribution.
- 50 kA short-circuit breaking capacity at the applicable rated voltage.
- Three-pole configuration for three-phase electrical distribution systems.
- Ekip Dip LSI electronic trip unit providing long-time, short-time and instantaneous protection.
- L protection: Long-time overload protection for sustained overcurrent conditions.
- S protection: Short-time delayed short-circuit protection.
- I protection: Instantaneous short-circuit protection.
- Adjustable electronic protection characteristics support coordination with upstream and downstream protective devices.
- 400 A frame rating within the ABB Tmax XT5S family.
- 140 mm three-pole device width for compatible distribution assemblies.
- Mechanical operating mechanism provides manual switching and automatic protective tripping.
- Robust moulded case construction designed for demanding commercial and industrial installations.
- Based on circuit breaker technology designed in accordance with IEC 60947-2.
Advanced Electronic LSI Circuit Protection
The ABB EPX-XT5S-E2-4003 uses an Ekip Dip electronic trip unit to monitor electrical current and initiate protective tripping when overload or short-circuit conditions occur. Its LSI protection functionality combines long-time overload protection with short-time delayed and instantaneous short-circuit protection. These functions allow protection characteristics to be configured for the electrical installation, helping minimise the effects of electrical faults and supporting continuity of supply where selective protection is achieved.
The ABB SACE Tmax XT5S400 platform combines electronic protection technology with a robust mechanical switching system. Its three-pole construction provides coordinated protection for three-phase electrical circuits, while the 400 A current rating and 50 kA breaking capacity make it suitable for appropriately designed commercial and industrial distribution installations. Compared with LS/I protection, the LSI configuration includes all three long-time, short-time and instantaneous protection functions, offering additional flexibility for electrical system coordination.
Typical Applications
- Commercial and industrial low-voltage distribution boards.
- ABB Protecta Power electrical distribution assemblies.
- Three-phase electrical distribution and higher-current feeder circuits.
- Industrial machinery and equipment supply circuits.
- Electrical switchboards and industrial control panels.
- Building services and infrastructure power distribution.
- Manufacturing facilities, warehouses and industrial electrical installations.
- Higher-current sub-distribution circuits requiring electronic LSI protection.
- Electrical distribution systems requiring coordinated long-time, short-time and instantaneous protection.
Technical Specifications
| Product range | Protecta Power Devices |
|---|---|
| Series | SACE Tmax XT5S |
| Frame designation | XT5S400 |
| ABB order code | 1SDX255190R1 |
| Product type | Electronic trip moulded case circuit breaker (MCCB) |
| Rated current | 400 A |
| Number of poles | 3 |
| Breaking capacity | 50 kA |
| Trip unit type | Ekip Dip electronic LSI |
| Overload protection | L – long-time protection |
| Short-time protection | S – delayed short-circuit protection |
| Instantaneous protection | I – instantaneous short-circuit protection |
| Trip technology | Electronic |
| Frame rated current | 400 A |
| Three-pole device width | 140 mm |
| Electrical system | Three-phase AC distribution |
| Operating mechanism | Mechanical switching mechanism |
| Application | Low-voltage electrical distribution |
| Applicable standard | IEC 60947-2 |
| Product group | Protecta Power Devices |
Frequently Asked Questions
What is the ABB EPX-XT5S-E2-4003 used for?
The ABB EPX-XT5S-E2-4003 is a three-pole moulded case circuit breaker designed to protect low-voltage electrical distribution circuits against overloads and short circuits using an Ekip Dip electronic LSI trip unit.
What is the rated current of the EPX-XT5S-E2-4003?
The circuit breaker has a 400 A rated current and belongs to the ABB SACE Tmax XT5S400 frame family, which has a frame current rating of 400 A.
What is the breaking capacity of this ABB MCCB?
The EPX-XT5S-E2-4003 has a specified 50 kA breaking capacity. The applicable operating voltage, prospective fault current and installation conditions must be considered when selecting the circuit breaker.
What does LSI mean on the ABB EPX-XT5S-E2-4003?
LSI identifies three electronic protection functions: long-time overload protection (L), short-time delayed short-circuit protection (S) and instantaneous short-circuit protection (I). These functions help protect electrical circuits while supporting coordination with other protective devices.
What is the difference between LSI and LS/I trip units?
An LSI trip unit provides long-time, short-time and instantaneous protection functions, allowing the short-circuit protection characteristics to be configured for coordination requirements. An LS/I trip unit provides long-time overload protection with a choice between short-time delayed or instantaneous short-circuit protection.
Trusted ABB Electronic Circuit Protection Technology
ABB SACE Tmax XT moulded case circuit breakers are engineered to deliver dependable overload and short-circuit protection in commercial and industrial low-voltage electrical distribution systems. The EPX-XT5S-E2-4003 combines a 400 A rated current, three-pole construction, 50 kA breaking capacity and Ekip Dip electronic LSI protection in a robust XT5S400 frame for reliable electrical distribution applications.
