1SDX255183R1 ABB EPX-XT4S-E2-2503 250A 3-Pole 50kA Electronic LSI MCCB

Why Choose the ABB EPX-XT4S-E2-2503 250A 3-Pole 50kA MCCB?

The ABB EPX-XT4S-E2-2503 is a high-performance 250 A, 3-pole moulded case circuit breaker (MCCB) designed to deliver reliable overload and short-circuit protection in low-voltage electrical distribution systems. Featuring a 50 kA breaking capacity and an Ekip electronic LSI trip unit, this circuit breaker provides configurable protection for commercial, industrial and infrastructure applications.

As part of the ABB Protecta Power Devices range, the EPX-XT4S-E2-2503 incorporates proven ABB SACE Tmax XT4S250 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 fault conditions.

With a 250 A rated current, three-pole configuration and 50 kA short-circuit breaking capacity, the EPX-XT4S-E2-2503 is suitable for three-phase electrical distribution circuits requiring advanced electronic protection. Its compact XT4S250 frame and approximately 105 mm three-pole device width support efficient integration into ABB Protecta Power distribution boards, electrical switchboards and compatible low-voltage switchgear assemblies.

Key Advantages

• 250 A rated current suitable for commercial and industrial low-voltage distribution circuits.
• 50 kA breaking capacity provides protection against high prospective short-circuit currents at the applicable rated voltage.
• Three-pole construction supports coordinated protection and switching of three-phase electrical circuits.
• Ekip electronic LSI trip unit provides configurable overload and short-circuit protection.
• Long-time (L) protection helps protect conductors and connected equipment against sustained overload conditions.
• Short-time (S) protection provides delayed short-circuit tripping to support protective device coordination.
• Instantaneous (I) protection provides rapid tripping during high-current short-circuit faults.
• Electronic trip technology supports flexible protection settings and selective coordination within appropriately designed distribution systems.
• ABB SACE Tmax XT4S250 technology combines electronic protection with robust moulded case construction.
• Compact three-pole design supports efficient installation in compatible distribution assemblies.

Key Features

• ABB Protecta Power Devices electronic trip moulded case circuit breaker.
• SACE Tmax XT4S250 circuit breaker platform.
• 250 A rated current for low-voltage electrical distribution protection.
• 50 kA short-circuit breaking capacity at the applicable rated voltage.
• Three-pole configuration for three-phase electrical distribution systems.
• Ekip 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 other protective devices.
• 250 A frame rating within the ABB Tmax XT4S family.
• Fixed circuit breaker construction with front terminals in the corresponding XT4S250 configuration.
• Mechanical operating mechanism provides manual switching and automatic protective tripping.
• Compact moulded case construction supports integration into low-voltage switchgear.
• Based on circuit breaker technology designed in accordance with IEC 60947-2.

Advanced Electronic LSI Circuit Protection

The ABB EPX-XT4S-E2-2503 uses an Ekip 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 settings to be coordinated with the electrical installation, helping minimise the effects of electrical faults and supporting continuity of supply where selective protection is achieved.

The ABB SACE Tmax XT4S250 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 250 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 provides long-time, short-time and instantaneous protection functions for additional flexibility in electrical system coordination.

Typical Applications

• Commercial and industrial low-voltage distribution boards.
• ABB Protecta Power electrical distribution assemblies.
• Three-phase electrical distribution and feeder circuits.
• Industrial machinery and equipment supply circuits.
• Electrical switchboards and industrial control panels.
• Building services and infrastructure power distribution.
• Manufacturing facilities 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.