1SDA056869R1 ABB E4H4000PR122/P-LSIG 4000A 3-Pole Air Circuit Breaker Moving Part

Why Choose the ABB E4H4000PR122/P-LSIG 4000A Air Circuit Breaker?

The ABB E4H4000PR122/P-LSIG, order code 1SDA056869R1, is a high-performance 4000 A three-pole air circuit breaker moving part designed for demanding low-voltage power distribution systems. Part of the established ABB SACE Emax E4 series, this withdrawable configuration combines the E4H high short-circuit performance class with the advanced PR122/P electronic overcurrent protection release.

The breaker is equipped with an ABB PR122/P-LSIG R4000 electronic overcurrent release, providing long-time overload, short-time delayed short-circuit, instantaneous short-circuit and earth-fault protection. This comprehensive LSIG protection configuration supports selective coordination while protecting cables, busbars, transformers and downstream equipment against overloads, phase faults and earth faults.

With a rated current of 4000 A, a three-pole withdrawable moving-part configuration and the E4H performance level, the E4H4000PR122/P-LSIG is engineered for high-capacity switchgear where protection performance, maintainability and continuity of service are important. Its moving-part construction is designed for use with the corresponding E4H fixed part, enabling withdrawal for inspection, servicing or replacement.

Key Advantages

• High-capacity 4000 A air circuit breaker moving part for demanding low-voltage distribution systems.
• Three-pole withdrawable configuration supports convenient maintenance, inspection and replacement.
• Advanced PR122/P-LSIG R4000 electronic protection release.
• Comprehensive long-time, short-time, instantaneous and earth-fault protection.
• E4H high short-circuit performance class for demanding power networks.
• Electronic protection supports selective coordination within complex distribution systems.
• Supplied with four auxiliary contacts for signalling and control functions.
• Includes open/closed circuit-breaker position indication.
• Designed for use with the corresponding ABB E4H withdrawable fixed part.
• Part of the proven ABB SACE Emax air circuit breaker platform.

Key Features

• ABB SACE Emax E4H air circuit breaker platform.
• 4000 A rated current.
• Three-pole construction.
• Withdrawable moving part (W MP) configuration.
• PR122/P-LSIG R4000 electronic overcurrent release.
• Long-time overload protection.
• Short-time delayed short-circuit protection.
• Instantaneous short-circuit protection.
• Earth-fault protection.
• Four auxiliary contacts for signalling and auxiliary functions.
• Open/closed breaker position indication.
• AC circuit-breaker design.
• High mechanical durability for demanding switching applications.
• Designed for integration into compatible ABB SACE Emax withdrawable switchgear assemblies.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E4 are designed to protect low-voltage electrical networks against damaging overcurrents while providing dependable switching and isolation of high-current circuits. The E4H performance class is intended for demanding power distribution environments where robust short-circuit performance and dependable operation are required.

The PR122/P electronic release continuously monitors circuit current and initiates breaker operation when configured protection thresholds are exceeded. In this LSIG configuration, long-time protection responds to sustained overloads, short-time protection supports selective short-circuit coordination, instantaneous protection rapidly interrupts severe faults, and earth-fault protection provides an additional layer of protection against ground-fault conditions.

Typical Applications

• Main low-voltage switchboards and power distribution assemblies.
• Industrial high-current power distribution systems.
• Transformer secondary and main incomer protection.
• Large feeder and busbar circuits requiring selective protection.
• Distribution systems requiring integrated earth-fault protection.
• Networks with high prospective short-circuit currents.
• Manufacturing and process plant electrical systems.
• Commercial buildings, utilities and critical infrastructure installations.