1SDA056852R1 ABB E4H4000 PR122/P-LSI 4000 A 3-Pole Fixed Air Circuit Breaker

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

The ABB 1SDA056852R1 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-LSI, this three-pole fixed circuit breaker combines a 4000 A rated current with ABB's PR122/P-LSI electronic overcurrent release for dependable and selective 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 flat horizontal terminals provides a robust arrangement for permanent installation within low-voltage switchboards.

The integrated PR122/P-LSI electronic trip unit provides long-time overload (L), short-time short-circuit (S) and instantaneous short-circuit (I) protection. With a rated uninterrupted current of 4000 A, three-pole configuration and high H-class breaking performance, the 1SDA056852R1 is well suited to main incoming, feeder and distribution protection duties where high fault-current capability and selective protection are required.

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-LSI electronic trip unit provides long-time, short-time and instantaneous overcurrent 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.
• 100 kA short-time withstand current for 1 s for robust high-fault-current performance.
• Fixed construction with rear flat 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-LSI R4000 electronic overcurrent release.
• Long-time overload (L) protection.
• Short-time short-circuit (S) 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.
• 100 kA rated short-time withstand current for 1 s.
• 75 kA rated short-time withstand current for 3 s.
• Fixed circuit breaker design with rear flat horizontal terminals.
• Fitted with four auxiliary contacts and open/closed position indication.

Selective High-Breaking-Capacity Power Distribution Protection

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 through the 220–500 V AC range and 85 kA at 660–690 V AC.

The PR122/P-LSI electronic release combines long-time overload, short-time and instantaneous short-circuit protection. The short-time protection function can support selective coordination between upstream and downstream protective devices, while instantaneous protection provides rapid interruption of severe fault currents. Combined with its 4000 A current rating and robust fixed construction, the 1SDA056852R1 is suitable for major switchboards and industrial distribution systems requiring dependable 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.