1SDA055789R1 ABB E1N 1600 PR122/P-LSIG 1600 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E1N 1600 PR122/P-LSIG Air Circuit Breaker?

The ABB E1N 1600 PR122/P-LSIG, order code 1SDA055789R1, is a high-performance 1600 A four-pole withdrawable air circuit breaker designed for switching and protection in low-voltage power distribution systems. As part of the ABB SACE Emax series, it combines robust high-current switching with the advanced PR122/P-LSIG electronic overcurrent release for demanding industrial, commercial and infrastructure installations.

The PR122/P-LSIG electronic trip unit provides comprehensive long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. These electronic protection functions support accurate system coordination and help protect cables, busbars and connected equipment against a wide range of electrical faults.

With a rated current of 1600 A, a four-pole withdrawable configuration and the E1N performance class, this circuit breaker is particularly suited to switchboards requiring dependable protection together with convenient inspection and maintenance. The four-pole arrangement enables switching of all four conductors in suitable three-phase distribution systems, while the withdrawable execution supports serviceability within compatible SACE Emax assemblies.

Key Advantages

• Heavy-duty 1600 A air circuit breaker for low-voltage power distribution.
• PR122/P-LSIG electronic trip unit provides comprehensive LSIG protection.
• Long-time, short-time, instantaneous and earth-fault protection.
• Four-pole withdrawable construction for flexible power distribution applications.
• Withdrawable execution supports inspection, maintenance and replacement.
• Advanced electronic protection supports system selectivity and coordinated fault protection.

Key Features

• ABB SACE Emax E1N series.
• 1600 A rated current.
• Four-pole configuration.
• Withdrawable execution.
• PR122/P-LSIG R1600 electronic overcurrent release.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• Integrated earth-fault protection.
• Designed for low-voltage switchboard and power distribution applications.

Reliable Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax E1N provide switching and overcurrent protection for high-current low-voltage distribution networks. The electronic trip unit continuously monitors circuit conditions and commands breaker operation when configured protection thresholds are exceeded, helping minimise damage caused by overloads and short circuits.

The PR122/P-LSIG release adds earth-fault protection to long-time, short-time and instantaneous overcurrent functions, providing a comprehensive protection package for demanding distribution systems. Combined with the four-pole withdrawable E1N construction, this makes the 1SDA055789R1 suitable for installations where protection flexibility, maintainability and continuity of service are important.

Typical Applications

• Industrial low-voltage switchboards.
• Main power distribution panels.
• Manufacturing and process plants.
• Commercial and infrastructure electrical distribution.
• Transformer secondary distribution systems.
• Four-wire distribution systems requiring earth-fault protection.