1SDX255181R1 ABB EPX-XT4S-E2-1003 100A 3-Pole 50kA MCCB LSI

Why Choose the ABB EPX-XT4S-E2-1003 100A 3-Pole 50kA MCCB?

The ABB EPX-XT4S-E2-1003 is a high-performance 100 A three-pole moulded case circuit breaker (MCCB) designed to provide dependable overload and short-circuit protection in low-voltage electrical distribution systems. Featuring a 50 kA breaking capacity and advanced LSI electronic protection, this circuit breaker is suitable for commercial, industrial and building electrical installations requiring reliable circuit protection and flexible protection coordination.

As part of the ABB Protecta Power distribution range, the EPX-XT4S-E2-1003 incorporates the ABB SACE Tmax XT4S circuit breaker platform with an Ekip electronic trip unit providing long-time, short-time and instantaneous (LSI) protection. These three protection functions allow electrical engineers to configure overload and short-circuit protection characteristics according to the requirements of the electrical installation.

With a 100 A rated current, three-pole configuration and 50 kA short-circuit breaking capacity, the EPX-XT4S-E2-1003 is designed for integration into low-voltage switchboards, distribution panels and compatible ABB Protecta Power assemblies. Its compact XT4S 160 frame provides an efficient solution for protecting three-phase outgoing circuits while supporting effective use of distribution board space.

Key Advantages

• 100 A rated current for protecting low-voltage electrical distribution circuits.
• 50 kA breaking capacity for installations requiring high short-circuit interruption capability.
• Three-pole (3P) configuration suitable for three-phase electrical distribution systems.
• Electronic LSI protection combining long-time, short-time and instantaneous overcurrent protection functions.
• Adjustable protection characteristics to support circuit protection coordination and selectivity.
• Short-time delayed protection helps coordinate upstream and downstream protective devices where appropriate settings are applied.
• Robust ABB Tmax XT4S 160 platform designed for professional low-voltage switchgear applications.
• 110 mm nominal device width supports compact three-pole installation.
• Suitable for ABB Protecta Power distribution assemblies in commercial and industrial installations.
• Electronic trip technology provides flexible protection settings for different electrical installation requirements.

Key Features

• ABB Protecta Power Devices product range.
• EPX-XT4S-E2-1003 model designation.
• 100 A nominal current rating.
• Three-pole (3P) circuit breaker configuration.
• 50 kA rated short-circuit breaking capacity.
• ABB SACE Tmax XT4S 160 moulded case circuit breaker platform.
• Ekip electronic LSI trip protection.
• Long-time (L) protection against sustained overload conditions.
• Short-time (S) protection against short circuits with a delayed trip characteristic.
• Instantaneous (I) protection for rapid interruption of high short-circuit currents.
• All three LSI protection functions available for protection adjustment and coordination.
• 110 mm nominal width for the three-pole XT4S configuration.
• Compact moulded case construction for electrical distribution assemblies.
• Designed for low-voltage switchboard and distribution panel integration.
• Compatible with appropriate ABB Tmax XT4 installation accessories and components.

Reliable LSI Electronic Protection for Three-Phase Power Distribution

The ABB EPX-XT4S-E2-1003 provides electronic protection against electrical overloads and short circuits through its LSI trip system. The long-time (L) function protects against sustained overload conditions, the short-time (S) function provides delayed short-circuit protection, and the instantaneous (I) function enables rapid interruption of high fault currents. These functions allow electrical engineers to establish appropriate protection settings for the connected circuit and coordinate protective devices within the distribution system.

The ABB Tmax XT4S 160 platform combines compact construction with high short-circuit interruption capability, making it suitable for modern commercial and industrial distribution boards. Unlike LS/I protection arrangements, where short-time or instantaneous protection is selected, the LSI configuration provides all three protection characteristics for greater adjustment flexibility. Within compatible ABB Protecta Power assemblies, the EPX-XT4S-E2-1003 can protect outgoing three-phase circuits while supporting dependable electrical distribution and fault management. Correct breaker selection and configuration should account for the installation voltage, prospective fault current, cable characteristics and required protection coordination.

Typical Applications

• ABB Protecta Power low-voltage distribution boards.
• Commercial building electrical distribution systems.
• Industrial electrical switchboards and control panels.
• Three-phase outgoing feeder and circuit protection.
• Electrical distribution systems in offices, retail premises and commercial facilities.
• Building services and infrastructure distribution panels.
• Industrial machinery and equipment supply circuit protection.
• Low-voltage switchgear requiring adjustable electronic LSI protection.
• Distribution systems requiring coordination between upstream and downstream circuit breakers.
• Electrical installations requiring high short-circuit interruption capability.