1SDA055533R1 ABB E4H 4000A 4P PR122/P-LSIG Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB E4H/f 4000 PR122/P-LSIG 1SDA055533R1 Circuit Breaker?

The ABB 1SDA055533R1 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 E4H high-performance platform with an ABB PR122/P-LSIG 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. Its PR122/P-LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection, giving comprehensive LSIG protection for 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 1SDA055533R1 is suited to high-capacity switchboard applications. It is also 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 air circuit breaker moving part.
• Withdrawable construction supports servicing, inspection and switchboard maintenance.
• Four-pole configuration with full-size neutral.
• PR122/P-LSIG R4000 electronic trip unit provides comprehensive electronic protection.
• LSIG protection functions cover overload, short-time, instantaneous and earth-fault conditions.
• 100 kA ultimate and service short-circuit breaking capacity across its 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 current.
• Four-pole (4P) configuration.
• Full-size neutral.
• Withdrawable (W) execution.
• Moving part (MP) for a compatible SACE Emax fixed part.
• PR122/P-LSIG R4000 electronic overcurrent release.
• LSIG protection: long-time, short-time, instantaneous and earth fault.
• 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 for signalling and control.
• Open/closed circuit-breaker position indication.

Advanced Withdrawable LSIG 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 1SDA055533R1 forms the moving part of the circuit breaker and is designed to interface with the corresponding fixed part, allowing the breaker to be withdrawn for isolation, inspection and maintenance.

The PR122/P-LSIG electronic release provides long-time protection against sustained overloads, short-time protection for controlled fault response and selective coordination, instantaneous protection against severe short circuits, and earth-fault protection. Combined with the 4000 A E4H platform, it provides comprehensive 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.