1SDX255178R1 ABB EPX-XT2S-E2-1604 160A 4-Pole 50kA Electronic LSI MCCB

Why Choose the ABB EPX-XT2S-E2-1604 160A 4-Pole MCCB?

The ABB EPX-XT2S-E2-1604 is a high-performance 160 A four-pole moulded case circuit breaker (MCCB) designed to deliver reliable overload and short-circuit protection in commercial and industrial electrical distribution systems. Featuring a 50 kA short-circuit breaking capacity and an advanced ABB Ekip DIP LSI electronic trip unit, this circuit breaker provides configurable protection for demanding low-voltage power distribution applications. It belongs to the ABB Protecta Power Devices range and is based on the established ABB SACE Tmax XT2S160 circuit breaker platform.

Unlike conventional thermal-magnetic MCCBs, the EPX-XT2S-E2-1604 incorporates an electronic protection release with three distinct protection functions: long-time overload protection (L), short-time delayed short-circuit protection (S) and instantaneous short-circuit protection (I). These functions allow electrical designers to configure the circuit breaker's response to different fault conditions and support coordination between upstream and downstream protective devices.

With a 160 A rated current, four-pole (4P) configuration and 50 kA breaking capacity, the ABB EPX-XT2S-E2-1604 is suitable for appropriately designed distribution circuits, commercial distribution boards and industrial power systems. Its compact 120 mm four-pole width makes it particularly useful where installation space is limited. The product is identified by ABB order code 1SDX255178R1.

Key Advantages

• 160 A rated current for reliable protection of appropriately designed commercial and industrial distribution circuits.
• 50 kA short-circuit breaking capacity provides substantial fault-interruption capability.
• Four-pole configuration enables simultaneous switching of three phase conductors and neutral.
• Electronic Ekip DIP LSI protection provides configurable overload and short-circuit protection characteristics.
• Long-time overload protection (L) helps protect cables and connected equipment against sustained excessive current.
• Short-time delayed protection (S) supports coordination and discrimination between protective devices.
• Instantaneous protection (I) provides rapid tripping during severe short-circuit faults.
• All three LSI protection functions are available, providing greater flexibility than an LS/I release with selectable S or I characteristics.
• Fully rated neutral supports four-pole electrical distribution applications requiring a neutral rating equal to the phase rating.
• Based on the established ABB SACE Tmax XT2S160 platform.
• Compact 120 mm four-pole width supports efficient distribution board integration.
• Designed for installation within compatible ABB Protecta Power distribution equipment.

Key Features

• ABB Protecta Power Devices product group.
• ABB SACE Tmax XT2S160 moulded case circuit breaker platform.
• 160 A rated current for low-voltage power distribution.
• 50 kA short-circuit breaking capacity at 415 V AC.
• Four-pole (4P) construction for three-phase and neutral switching.
• ABB Ekip DIP LSI electronic trip unit.
• Long-time (L) protection against sustained overload conditions.
• Short-time delayed (S) protection for short-circuit protection coordination.
• Instantaneous (I) protection for rapid operation during high-current faults.
• Electronic protection technology enables adjustment of protective characteristics.
• 160 A frame class with a 160 A electronic release.
• 100% rated neutral in the corresponding four-pole XT2S160 LSI configuration.
• 120 mm four-pole width for compact panel installation.
• Fixed-mounted circuit breaker construction with front terminals.
• Manual operating mechanism with automatic protective tripping.
• Suitable for compatible ABB Protecta Power electrical distribution assemblies.
• ABB manufacturer order code: 1SDX255178R1.

Advanced Electronic LSI Protection for Industrial Power Distribution

The ABB EPX-XT2S-E2-1604 uses an advanced electronic trip unit to monitor electrical current and initiate protective tripping when an overload or short-circuit condition exceeds the configured protection thresholds. Electronic protection provides greater flexibility than conventional thermal-magnetic releases and is particularly valuable in electrical distribution systems where accurate protection settings and coordination between protective devices are important.

The long-time (L) protection function responds to sustained overload conditions that may cause excessive heating in electrical cables and connected equipment. The electronic trip unit monitors current over time and initiates tripping when the configured overload characteristic is exceeded. Long-time protection settings should be selected according to cable capacity, connected loads and installation conditions.

The short-time delayed (S) protection function provides short-circuit protection with a configurable delay. This can assist with protective device discrimination by allowing a downstream circuit breaker to clear a fault before an upstream protective device operates. Correctly coordinated short-time protection can help minimise unnecessary disruption to unaffected circuits.

The instantaneous (I) protection function provides rapid tripping when a sufficiently high short-circuit current is detected. This helps limit the duration of severe electrical faults and reduce their potential impact on cables, distribution equipment and connected electrical loads.

A key advantage of the ABB Ekip DIP LSI trip unit is that all three protection characteristics — L, S and I — are included. This differs from an LS/I electronic release, which provides long-time protection with a choice between short-time delayed and instantaneous protection. The LSI configuration offers additional flexibility when designing coordinated electrical protection systems.

The four-pole configuration enables simultaneous switching of three phase conductors and the neutral conductor. The corresponding XT2S160 LSI configuration features a fully rated neutral, providing a neutral current rating equal to the phase current rating. This supports appropriately designed three-phase distribution systems where four-pole switching and full neutral protection are required.

The ABB SACE Tmax XT2S160 platform combines compact construction with advanced electronic protection functionality. With a 160 A rated current, 50 kA breaking capacity at 415 V AC and 120 mm four-pole width, the EPX-XT2S-E2-1604 provides an effective solution for demanding electrical distribution applications where both protection performance and installation space are important.

Typical Applications

• ABB Protecta Power distribution board installations.
• Commercial building electrical distribution systems.
• Three-phase and neutral outgoing circuit protection.
• Industrial low-voltage electrical distribution panels.
• Low-voltage switchgear and power distribution assemblies.
• Commercial offices, retail premises and warehouse installations.
• Building services and mechanical equipment distribution circuits.
• Industrial manufacturing and production facilities.
• Electrical sub-distribution boards and appropriately rated feeder circuits.
• Power distribution systems requiring high short-circuit interruption capability.
• Installations requiring electronic long-time, short-time and instantaneous protection.
• Electrical distribution systems where protective device discrimination is an important design consideration.
• Three-phase distribution circuits requiring a fully rated neutral.
• Electrical infrastructure requiring configurable electronic protection characteristics.
• Distribution board upgrades where electrical and mechanical compatibility has been verified.