1SDA055532R1 ABB E4H 4000A 4P PR122/P-LSI Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB E4H/f 4000 PR122/P-LSI 1SDA055532R1 Circuit Breaker?

The ABB 1SDA055532R1 is the moving part of a SACE Emax E4H 4000 A withdrawable air circuit breaker, designed for demanding low-voltage power distribution systems. This four-pole unit combines the high-performance E4H platform with an ABB PR122/P-LSI R4000 electronic overcurrent release.

The breaker features a four-pole configuration with full-size neutral and a withdrawable moving-part design for use with a compatible SACE Emax fixed part. The PR122/P-LSI release provides long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection, supporting selective and dependable protection of high-current distribution circuits.

With a rated uninterrupted current of 4000 A, rated operational voltage of 690 V AC and rated ultimate short-circuit breaking capacity of 100 kA, the 1SDA055532R1 is engineered for demanding switchboard applications. It is fitted with four auxiliary contacts and circuit-breaker open/closed position indication for integration into control and signalling systems.

Key Advantages

• High-current 4000 A SACE Emax E4H circuit breaker moving part.
• Withdrawable construction supports inspection, servicing and switchboard maintenance.
• Four-pole configuration with full-size neutral.
• PR122/P-LSI R4000 electronic trip unit for advanced overcurrent protection.
• LSI protection functions cover long-time overload, short-time delayed and instantaneous short-circuit conditions.
• 100 kA rated ultimate and service short-circuit breaking capacity across the specified AC operational voltage range.
• Four auxiliary contacts and open/closed position indication support switchboard signalling and control.

Key Features

• ABB SACE Emax E4H air circuit breaker moving part.
• 4000 A rated uninterrupted current.
• Four-pole (4P) configuration.
• Full-size neutral.
• Withdrawable (W) execution.
• Moving part (MP) for a compatible SACE Emax fixed part.
• PR122/P-LSI R4000 electronic overcurrent release.
• LSI protection: long-time, short-time and instantaneous.
• 690 V AC rated operational voltage.
• 100 kA rated ultimate short-circuit breaking capacity.
• 85 kA short-time withstand current for 1 s.
• Four auxiliary contacts and open/closed circuit-breaker position indication.

Advanced Withdrawable LSI Protection for High-Current Distribution

The withdrawable SACE Emax configuration is designed for low-voltage switchboards where maintainability and operational flexibility are important. The ABB 1SDA055532R1 forms the moving part of the circuit breaker and interfaces with the corresponding fixed part, allowing the breaker to be withdrawn from its service position for isolation, inspection and maintenance.

The PR122/P-LSI electronic release provides long-time protection against sustained overloads, short-time protection for controlled short-circuit response and selective coordination, and instantaneous protection against severe short circuits. Combined with the 4000 A E4H platform, it provides robust protection for high-capacity incoming and distribution circuits.

Typical Applications

• Withdrawable low-voltage distribution switchboards.
• Industrial power distribution systems.
• Main incoming circuit protection.
• High-current feeder circuits.
• Manufacturing and process plants.
• Commercial and infrastructure power systems.
• Transformer and generator distribution systems.
• Power distribution and switchgear assemblies.