1SDA056485R1 ABB E3H2500 PR122/P-LSIG 2500 A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA056485R1 E3H 2500 A Air Circuit Breaker?

The ABB 1SDA056485R1 is a high-performance SACE Emax E3H air circuit breaker (ACB) designed for protection and switching in high-current low-voltage electrical distribution systems. Identified as E3H2500 PR122/P-LSIG In=2500A 3P W MP, this three-pole withdrawable circuit breaker combines a 2500 A rated current with the advanced PR122/P-LSIG electronic protection release.

As part of the ABB SACE Emax / New Emax range, the E3H2500 is engineered for demanding industrial, commercial and infrastructure power distribution applications. Its PR122/P-LSIG electronic trip unit provides long-time, short-time, instantaneous and ground-fault protection, helping protect cables, busbars and connected equipment against overloads, short circuits and earth faults.

This version features a three-pole withdrawable moving-part configuration for use with the appropriate fixed cradle in an electrical switchboard. With a 2500 A rated uninterrupted current, rated voltage up to 690 V AC and an ultimate short-circuit breaking capacity of 100 kA at 400 V AC, it is suited to high-power distribution systems where dependable protection and serviceability are essential.

Key Advantages

• Heavy-duty 2500 A air circuit breaker for high-current power distribution.
• PR122/P-LSIG electronic protection release for comprehensive circuit protection.
• LSIG functionality provides long-time, short-time, instantaneous and ground-fault protection.
• Three-pole withdrawable configuration supports maintenance and switchboard servicing.
• 100 kA breaking capacity at 400 V AC for demanding fault-current conditions.
• Rated for electrical distribution systems up to 690 V AC.
• Includes four auxiliary contacts for open/closed circuit breaker position indication.
• Part of the proven ABB SACE Emax circuit breaker range.

Key Features

• ABB SACE Emax E3H frame.
• 2500 A rated uninterrupted current.
• PR122/P-LSIG electronic trip unit.
• Three-pole configuration.
• Withdrawable moving-part design.
• 690 V AC rated voltage.
• 100 kA ultimate short-circuit breaking capacity at 400 V AC, 50 Hz.
• Integrated ground-fault protection through the LSIG protection release.
• Four auxiliary contacts for open/closed position indication.
• Optional motor operating mechanism capability.

Reliable Circuit Protection for Power Distribution

Air circuit breakers such as the ABB E3H2500 provide switching and automatic protection for high-current electrical distribution systems. The PR122/P electronic release monitors circuit conditions and enables coordinated protection against overloads, short circuits and ground faults, helping safeguard cables, busbars, transformers and downstream electrical equipment.

The LSIG configuration combines long-time overload protection, short-time selective short-circuit protection, instantaneous short-circuit protection and ground-fault protection. The withdrawable construction also allows the breaker moving part to be disconnected from its switchboard cradle, supporting inspection, maintenance and replacement in installations where serviceability and continuity are important.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Main incomer and high-current feeder protection.
• Manufacturing and process plants.
• Commercial and infrastructure electrical systems.
• Transformer secondary distribution circuits.
• Switchboards requiring withdrawable circuit breakers.
• Power distribution systems requiring selective LSIG protection.