1SDA056851R1 ABB E4H4000 PR122/P-LI 4000 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E4H4000 PR122/P-LI Air Circuit Breaker?

The ABB 1SDA056851R1 is a high-performance SACE Emax E4H air circuit breaker designed for switching and protection in high-current low-voltage electrical distribution systems. Identified as E4H4000 PR122/P-LI, this three-pole fixed circuit breaker combines a 4000 A rated current with ABB's PR122/P-LI electronic overcurrent release for dependable overload and instantaneous short-circuit protection.

As part of the ABB SACE Emax / New Emax range, the E4H4000 is engineered for demanding industrial, commercial and infrastructure power distribution applications. Its H short-circuit performance level provides an ultimate short-circuit breaking capacity of 100 kA at 400 V AC and 85 kA at 690 V AC. The fixed construction with rear horizontal terminals provides a robust arrangement for permanent installation within low-voltage switchboards.

The integrated PR122/P-LI electronic trip unit provides long-time overload (L) and instantaneous short-circuit (I) protection. With a rated uninterrupted current of 4000 A, three-pole configuration and high H-class breaking performance, the 1SDA056851R1 is well suited to main incoming, feeder and distribution protection duties in substantial low-voltage installations.

Key Advantages

• High-capacity 4000 A air circuit breaker for demanding low-voltage power distribution.
• Three-pole configuration designed for three-phase electrical systems.
• PR122/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection.
• High 100 kA Icu at 400 V AC ultimate short-circuit breaking capacity.
• Maintains 85 kA Icu at 690 V AC for demanding higher-voltage distribution systems.
• E4H high-breaking-capacity platform for installations with substantial prospective fault currents.
• Fixed construction with rear horizontal terminals for permanent switchboard installation.
• Fitted with four auxiliary contacts and circuit breaker open/closed position indication.

Key Features

• ABB SACE Emax E4H series.
• 4000 A rated uninterrupted current.
• Three-pole circuit breaker configuration.
• PR122/P-LI electronic overcurrent release.
• Long-time overload (L) protection.
• Instantaneous short-circuit (I) protection.
• 100 kA Icu at 400 V AC.
• 100 kA Icu at 500 V AC.
• 85 kA Icu at 690 V AC.
• H short-circuit performance level.
• Fixed circuit breaker design with rear horizontal terminals.
• Fitted with four auxiliary contacts.
• Integrated open/closed circuit breaker position indication.
• Designed to IEC requirements for low-voltage air circuit breakers.

High Breaking Capacity for Demanding Power Distribution

Air circuit breakers such as the ABB E4H4000 provide switching and protection for high-current low-voltage distribution systems. The E4H performance level is designed for installations with substantial prospective fault currents, providing an ultimate short-circuit breaking capacity of 100 kA at 400–500 V AC and 85 kA at 660–690 V AC.

The PR122/P-LI electronic release provides long-time overload and instantaneous short-circuit protection, allowing the breaker to respond to sustained overload conditions and severe short circuits. Combined with its 4000 A current rating, high breaking performance and fixed rear-terminal construction, the 1SDA056851R1 is suitable for major switchboards and industrial distribution systems requiring robust high-current protection.

Typical Applications

• Main incoming circuit protection in high-current low-voltage switchboards.
• Industrial power distribution systems.
• Transformer secondary distribution and protection.
• Protection of high-current distribution feeders and busbar systems.
• Large commercial and infrastructure electrical installations.
• Manufacturing plants and process facilities.
• Utility and energy distribution installations.
• High-fault-level switchgear and electrical distribution assemblies.