1SDA056353R1 ABB E3H800 PR121/P-LSI 800A 3P Withdrawable Air Circuit Breaker

Why Choose the ABB E3H800 PR121/P-LSI 800A 3P Withdrawable Air Circuit Breaker?

The ABB E3H800 PR121/P-LSI, order code 1SDA056353R1, is a high-performance SACE Emax air circuit breaker moving part designed for protection and switching in demanding low-voltage electrical distribution systems. This E3H breaker has a rated current of 800 A, a three-pole configuration and ABB's electronic PR121/P-LSI overcurrent release.

Designed as the moving portion of a withdrawable circuit-breaker installation, the E3H800 supports convenient isolation, inspection and servicing within compatible SACE Emax switchgear. The H short-circuit performance level provides a rated ultimate short-circuit breaking capacity of up to 100 kA and a rated service short-circuit breaking capacity of 85 kA, making this breaker suitable for installations with substantial prospective fault currents.

The PR121/P-LSI electronic release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. Combined with a rated operational voltage of 690 V AC, 800 A current rating and three-pole withdrawable construction, the 1SDA056353R1 provides dependable protection for industrial incomers, feeders and other important three-phase distribution circuits.

Key Advantages

• Robust 800 A SACE Emax air circuit breaker moving part for industrial power distribution.
• Three-pole configuration designed for three-phase low-voltage circuits.
• PR121/P-LSI electronic overcurrent release provides long-time, short-time and instantaneous protection.
• Withdrawable construction supports convenient isolation, inspection and switchboard maintenance.
• High H-level short-circuit performance with up to 100 kA Icu.
• Four auxiliary contacts and open/closed position indication support switchboard monitoring and control.

Key Features

• ABB SACE Emax E3H air circuit breaker moving part.
• 800 A rated current.
• Three-pole configuration.
• PR121/P-LSI R800 electronic overcurrent release.
• LSI protection functions for long-time, short-time and instantaneous overcurrent protection.
• Overload release adjustment range of 400–800 A.
• Short-time short-circuit release adjustment range of 800–8000 A.
• Instantaneous short-circuit release adjustment range of 1200–12000 A.
• H short-circuit performance level.
• Withdrawable moving-part construction for compatible SACE Emax switchgear.
• Rated operational voltage up to 690 V AC.
• Four auxiliary contacts configured as two normally open and two normally closed contacts.

Reliable High-Current Protection for Low-Voltage Distribution

Air circuit breakers such as the ABB SACE Emax E3H800 protect electrical distribution systems against damaging overload and short-circuit conditions. The PR121/P-LSI electronic release combines long-time, short-time and instantaneous protection functions, enabling coordinated protection against sustained overloads and different levels of short-circuit fault.

The withdrawable moving-part design is particularly valuable in industrial switchboards where serviceability and operational flexibility are important. The breaker can be isolated from its compatible fixed part for inspection or maintenance, while its 800 A rating, three-pole architecture and H-level short-circuit performance provide dependable protection for demanding three-phase distribution systems.

Typical Applications

• Main incoming protection for industrial low-voltage switchboards.
• Three-phase feeder and distribution circuit protection.
• Manufacturing plants and process facilities.
• Commercial and infrastructure power distribution systems.
• Motor control centres and electrical distribution assemblies.
• Withdrawable switchgear installations requiring high short-circuit performance and serviceability.