1SDA056344R1 ABB E3H800 PR121/P-LI 800 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA056344R1 E3H800 Air Circuit Breaker?

The ABB 1SDA056344R1 is a high-performance SACE Emax E3H air circuit breaker (ACB) designed for protection and switching in demanding low-voltage electrical distribution systems. As part of the ABB New Emax E3 series, this four-pole fixed circuit breaker combines an 800 A rated current with the PR121/P-LI electronic overcurrent release for dependable protection of industrial, commercial and infrastructure power installations.

The E3H800 is equipped with ABB's PR121/P-LI R800 electronic trip unit, providing long-time overload and instantaneous short-circuit protection. This LI protection configuration provides essential electronic overcurrent protection, while the four-pole construction supports switching and protection across three phase conductors and the neutral conductor in compatible low-voltage distribution systems.

With an 800 A rated uninterrupted current, four-pole fixed construction and rear horizontal terminals, the 1SDA056344R1 is engineered for permanent integration into low-voltage switchboards. The E3H high-performance version provides an ultimate short-circuit breaking capacity of 100 kA up to 500 V AC and 85 kA at 660–690 V AC, making it suitable for installations with substantial prospective fault currents.

Key Advantages

• High-performance ABB SACE Emax E3H air circuit breaker for demanding low-voltage distribution.
• 800 A rated current for industrial, commercial and infrastructure power systems.
• PR121/P-LI electronic overcurrent release for long-time overload and instantaneous short-circuit protection.
• Four-pole construction supports three-phase systems requiring neutral switching.
• Ultimate short-circuit breaking capacity of up to 100 kA for high-fault-level installations.
• Fixed mounting configuration for permanent integration into low-voltage switchboards.
• Rear horizontal terminals facilitate connection to switchboard busbars and conductors.
• Four auxiliary contacts with open/closed position indication support circuit-breaker monitoring and control.

Key Features

• ABB SACE Emax E3H800 series air circuit breaker.
• 800 A rated uninterrupted current.
• Four-pole configuration.
• Fixed circuit-breaker version.
• Rear horizontal terminals.
• PR121/P-LI R800 electronic overcurrent release.
• LI protection covering long-time overload and instantaneous short-circuit protection.
• Rated operational voltage of 690 V AC.
• Rated insulation voltage of 1000 V.
• Rated impulse withstand voltage of 12 kV.
• Ultimate short-circuit breaking capacity of up to 100 kA.
• Four auxiliary contacts with circuit-breaker open/closed position indication.

Reliable Protection for High-Performance Power Distribution

Air circuit breakers such as the ABB E3H800 provide switching, isolation and protection for demanding low-voltage distribution systems. The electronic trip unit monitors current conditions and enables the breaker to interrupt overload and short-circuit faults, helping protect busbars, cables, transformers and connected electrical equipment from potentially damaging overcurrents.

The integrated PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection. Combined with the E3H breaker's 800 A current rating, four-pole construction and ultimate breaking capacity of up to 100 kA, the 1SDA056344R1 is particularly suitable for main incomers and critical distribution circuits requiring dependable protection and high short-circuit performance.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Manufacturing and process plants.
• Commercial and large-building electrical distribution.
• Main incomer and feeder protection.
• Three-phase four-wire electrical distribution systems.
• Generator and transformer distribution circuits.
• Power control centres and fixed switchgear assemblies.
• Infrastructure and utility installations with high prospective fault currents.