1SDA057565R1 ABB E3H-A 1200 PR121/P-LSI 1200 A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA057565R1 E3H-A 1200 Air Circuit Breaker?

The ABB 1SDA057565R1 is a high-performance SACE Emax E3H-A 1200 air circuit breaker moving part designed for reliable switching and protection in demanding low-voltage power distribution systems. As part of the proven ABB SACE Emax series, this three-pole withdrawable circuit breaker incorporates a PR121/P-LSI electronic overcurrent release for dependable protection of high-current industrial electrical systems.

This circuit breaker combines robust construction with advanced electronic protection. The PR121/P-LSI R1200 release provides long-time, short-time and instantaneous protection functions, helping protect electrical distribution equipment against overload and short-circuit conditions. Its withdrawable configuration supports maintenance and replacement within compatible SACE Emax switchgear without requiring a permanently fixed breaker arrangement.

With a rated current of 1200 A, a three-pole configuration and an instantaneous protection setting of 18000 A, the 1SDA057565R1 is suited to industrial distribution boards, switchgear assemblies and power distribution systems requiring dependable high-performance circuit protection. The breaker is supplied as a withdrawable moving part and is configured for UL applications.

Key Advantages

• High-performance ABB SACE Emax air circuit breaker for industrial power distribution.
• 1200 A rated current for high-current electrical systems.
• Three-pole configuration for three-phase power distribution.
• Advanced PR121/P-LSI electronic overcurrent release.
• LSI protection provides long-time, short-time and instantaneous overcurrent protection.
• 18000 A instantaneous protection setting.
• Withdrawable moving-part construction supports efficient switchboard servicing and maintenance.
• E3H-A high-performance configuration for demanding circuit-protection applications.
• UL configuration for low-voltage power circuit-breaker applications.

Key Features

• ABB SACE Emax E3H-A 1200 series.
• 1200 A rated current.
• PR121/P-LSI R1200 electronic overcurrent release.
• LSI protection functions: long-time, short-time and instantaneous.
• 18000 A instantaneous setting.
• Three-pole circuit-breaker configuration.
• Withdrawable moving part for compatible SACE Emax switchgear.
• Electronic trip-unit technology for precise overcurrent protection.
• Designed for AC low-voltage power distribution.
• UL configuration.
• ABB order code 1SDA057565R1.

Reliable Circuit Protection for Industrial Power Distribution

Air circuit breakers such as the ABB SACE Emax provide switching and overcurrent protection for high-current low-voltage electrical distribution systems. They help protect cables, busbars, switchgear and connected equipment against overload and short-circuit conditions while providing dependable circuit isolation and switching within industrial power networks.

The PR121/P-LSI electronic release provides long-time, short-time and instantaneous protection functions, enabling effective protection across a range of overcurrent conditions. Combined with the high-performance E3H-A platform and withdrawable construction, the 1SDA057565R1 provides a practical solution for industrial switchboards where reliable protection, operational performance and maintainability are key requirements.

Typical Applications

• Industrial low-voltage power distribution systems.
• Main incomer and feeder protection in electrical switchboards.
• Manufacturing and process plant electrical distribution.
• Commercial and industrial switchgear assemblies.
• High-current three-phase distribution circuits.
• Power distribution centres and electrical infrastructure.
• Withdrawable SACE Emax circuit-breaker installations.