1SDA056424R1 ABB E3H1600 PR121/P-LI 1600A 4P Withdrawable Air Circuit Breaker

Why Choose the ABB E3H1600 PR121/P-LI 1600A 4P Withdrawable Air Circuit Breaker?

The ABB E3H1600 PR121/P-LI, order code 1SDA056424R1, 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 1600 A, a four-pole configuration and ABB's electronic PR121/P-LI R1600 overcurrent release.

Designed as the moving part of a withdrawable circuit-breaker installation, the E3H1600 enables convenient isolation and servicing when combined with the appropriate E3 fixed part. Its H short-circuit performance level provides a rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC and 85 kA at 690 V AC, supporting installations with substantial prospective fault currents.

The PR121/P-LI electronic release provides long-time overload and instantaneous short-circuit protection. Combined with its 1600 A rating, four-pole architecture, 690 V AC rated operational voltage and withdrawable construction, the 1SDA056424R1 is well suited to main incomers, high-current feeders and critical industrial power distribution circuits.

Key Advantages

• High-performance 1600 A SACE Emax air circuit breaker moving part.
• Four-pole configuration for suitable three-phase systems incorporating a neutral conductor.
• PR121/P-LI electronic overcurrent release provides long-time and instantaneous protection.
• Withdrawable moving-part construction supports convenient isolation, servicing and switchboard maintenance.
• High H-level short-circuit performance with 100 kA Icu at 400 V AC.
• Four auxiliary contacts provide circuit-breaker open/closed status signalling.

Key Features

• ABB SACE Emax E3H air circuit breaker moving part.
• 1600 A rated uninterrupted current.
• Four-pole configuration.
• PR121/P-LI R1600 electronic overcurrent release.
• LI protection functions for long-time overload and instantaneous short-circuit protection.
• Instantaneous short-circuit protection adjustment range of 2400–24000 A.
• H short-circuit performance level.
• Rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC.
• Rated ultimate short-circuit breaking capacity of 85 kA at 690 V AC.
• Withdrawable moving-part version for compatible SACE Emax switchgear.
• Rated operational voltage of 690 V AC.
• Four auxiliary contacts, comprising two NO and two NC contacts.

Reliable LI Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H1600 protect high-current electrical distribution systems against damaging overload and short-circuit conditions. The PR121/P-LI electronic release combines long-time overload protection with instantaneous short-circuit protection, helping safeguard busbars, cables and connected electrical equipment.

The withdrawable moving-part design is particularly valuable in industrial switchboards where serviceability and operational flexibility are important. When installed with the appropriate fixed part, the breaker can be disconnected for isolation or maintenance, while its 1600 A rating, four-pole architecture and H-level short-circuit performance provide robust protection for demanding power distribution systems.

Typical Applications

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