1SDX255142R1 ABB EPX-XT2S-E1-1603 160A 3-Pole 50kA MCCB LS/I

Why Choose the ABB EPX-XT2S-E1-1603 160A 3-Pole 50kA MCCB?

The ABB EPX-XT2S-E1-1603 is a high-performance 160 A three-pole moulded case circuit breaker (MCCB) designed to provide dependable overload and short-circuit protection in commercial and industrial low-voltage electrical distribution systems. Part of the ABB Protecta Power Devices range, this circuit breaker combines a 50 kA short-circuit breaking capacity with an electronic Ekip LS/I trip unit, offering flexible protection for demanding three-phase electrical installations.

Built around the established ABB SACE Tmax XT2S platform, the EPX-XT2S-E1-1603 incorporates electronic protection technology that allows its operating characteristics to be configured to suit the electrical installation. Unlike conventional thermal-magnetic MCCBs, the electronic trip unit uses electronic sensing and protection logic to provide adjustable overload and short-circuit protection functions.

The LS/I protection arrangement provides long-time overload protection (L) together with a selectable short-circuit protection characteristic: short-time delayed protection (S) or instantaneous protection (I). This enables electrical designers to select an appropriate short-circuit response according to the protection coordination requirements of the distribution system.

With its 160 A rated current, three-pole configuration, 50 kA breaking capacity and compact 100 mm three-pole width, the ABB EPX-XT2S-E1-1603 provides a versatile protection solution for compatible ABB Protecta Power panelboards and electrical distribution assemblies.

The product is identified by ABB order code 1SDX255142R1, supporting accurate specification, procurement, maintenance and replacement.

Key Advantages

• 160 A rated current for appropriately designed three-phase electrical distribution circuits.
• Three-pole (3P) configuration for coordinated switching and protection of three-phase conductors.
• 50 kA short-circuit breaking capacity for installations requiring substantial fault-interruption performance.
• Electronic Ekip LS/I trip unit provides configurable overload and short-circuit protection.
• Long-time overload protection (L) helps safeguard conductors and connected equipment against sustained excessive current.
• Selectable short-time or instantaneous protection supports different short-circuit protection strategies.
• Adjustable electronic protection characteristics help match the MCCB to the electrical circuit.
• Short-time delayed protection option can assist with coordination between upstream and downstream protective devices.
• Instantaneous protection option provides rapid tripping when the selected short-circuit threshold is reached.
• Electronic protection technology offers precise configuration of the available protection functions.
• Compact 100 mm three-pole width supports efficient use of space within compatible distribution equipment.
• ABB SACE Tmax XT2S construction combines robust mechanical design with established electronic circuit protection technology.
• ABB Protecta Power compatibility supports integration into appropriately configured distribution assemblies.
• ABB order code identification simplifies product selection, procurement and maintenance documentation.

Key Features

• ABB Protecta Power Devices product group.
• EPX-XT2S-E1-1603 product designation.
• 160 A rated current for low-voltage electrical distribution.
• Three-pole (3P) construction for three-phase circuits.
• 50 kA specified short-circuit breaking capacity.
• Electronic Ekip LS/I trip unit for advanced circuit protection.
• Long-time protection (L) for sustained overload conditions.
• Short-time protection (S) option for delayed short-circuit tripping.
• Instantaneous protection (I) option for rapid short-circuit tripping.
• Selectable S or I protection mode alongside the long-time protection function.
• Adjustable overload protection characteristics within the manufacturer's specified settings.
• Configurable short-circuit protection to support installation requirements.
• Electronic current sensing for protective trip operation.
• ABB SACE Tmax XT2S platform with S short-circuit performance classification.
• XT2 160 frame family for professional low-voltage distribution applications.
• 100 mm three-pole device width for compact installation.
• Manual switching mechanism with automatic electronic protective tripping.
• Robust moulded case construction suitable for commercial and industrial distribution systems.
• Compatible ABB Protecta Power installation using the appropriate mounting and connection components.
• ABB order code 1SDX255142R1 for accurate product identification.

Advanced Electronic LS/I Protection for Three-Phase Power Distribution

The ABB EPX-XT2S-E1-1603 provides advanced electronic protection for low-voltage electrical distribution systems where reliable overload protection, configurable short-circuit response and substantial fault-interruption capability are required. Its Ekip LS/I electronic trip unit offers greater flexibility than a conventional fixed-characteristic circuit breaker, helping electrical designers match protective performance to the requirements of the installation.

The long-time protection function (L) provides overload protection for the connected electrical circuit. It responds when current exceeds the configured protection threshold for a sufficient period, helping prevent excessive heating of conductors and connected equipment. Correct adjustment of the long-time protection settings is essential to ensuring that the circuit breaker provides suitable protection for the conductor size, installation method and expected operating load.

The short-time protection function (S) provides a delayed response to short-circuit currents when this mode is selected. The delay can be useful in electrical distribution systems where coordination between upstream and downstream protective devices is required. By allowing a downstream device an opportunity to clear a fault first, a correctly designed protection arrangement may reduce unnecessary disconnection of unaffected circuits.

Alternatively, the instantaneous protection function (I) provides rapid operation when the fault current reaches the selected threshold. This mode is suitable where fast fault interruption is the priority and a short-time delay is not required. The appropriate choice depends on the prospective fault current, connected equipment, conductor withstand characteristics and overall protection strategy.

An important distinction is that LS/I protection does not mean that all three L, S and I functions operate independently at the same time. The ABB Ekip LS/I arrangement provides long-time overload protection together with a choice between short-time delayed and instantaneous short-circuit protection. Where independent L, S and I functions are required together, an LSI trip-unit configuration should be considered.

The 160 A rated current makes the EPX-XT2S-E1-1603 suitable for appropriately designed distribution feeders and outgoing circuits serving substantial electrical loads. Its electronic protection settings allow the MCCB to be configured for the application within the manufacturer's specified adjustment limits. This flexibility is particularly valuable where protection coordination must be considered alongside conductor protection and operational continuity.

The 50 kA short-circuit breaking capacity is a key characteristic of the XT2S platform. Electrical distribution systems can experience prospective short-circuit currents considerably higher than their normal operating currents. The selected MCCB must therefore be capable of interrupting the maximum prospective fault current at its installation point. Breaking-capacity ratings are voltage-dependent, so the applicable ABB technical data should be checked against the actual system operating voltage.

The three-pole construction provides coordinated switching and protection of the three phase conductors. This makes the breaker suitable for three-phase distribution applications where a separately switched neutral pole is not required. For circuits requiring neutral switching, an appropriate four-pole MCCB should be selected instead.

The ABB SACE Tmax XT2S platform combines electronic protection capability with compact mechanical construction. Its 100 mm three-pole width supports efficient integration into compatible electrical distribution assemblies, while the XT2 160 frame family provides a practical solution for professional low-voltage power distribution.

As part of the ABB Protecta Power Devices range, the EPX-XT2S-E1-1603 is intended for installation in compatible panelboards and distribution assemblies using the correct mounting and connection components. Before commissioning, electrical designers and installers should verify the prospective fault current, operating voltage, conductor ratings, electronic trip settings, discrimination requirements and compatibility with the selected distribution assembly.

Typical Applications

• Commercial and industrial low-voltage electrical distribution systems.
• ABB Protecta Power panelboards and compatible distribution assemblies.
• Three-phase outgoing circuit protection.
• Industrial switchboards and sub-distribution panels.
• Manufacturing and production facilities.
• Commercial offices and business premises.
• Retail buildings and hospitality facilities.
• Warehouses and logistics centres.
• Building services electrical distribution.
• Mechanical plant and appropriately designed three-phase feeder circuits.
• Distribution circuits requiring electronic overload protection.
• Installations requiring selectable short-time or instantaneous short-circuit protection.
• Electrical distribution systems where protection coordination is important.
• Installations requiring a 50 kA short-circuit breaking capacity.
• Electrical infrastructure upgrades, maintenance and replacement projects.