1SDA056811R1 ABB E4S4000 PR122/P-LI 4000 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E4S4000 PR122/P-LI Air Circuit Breaker?

The ABB E4S4000 PR122/P-LI, order code 1SDA056811R1, is a high-current SACE Emax air circuit breaker moving part designed for switching and overcurrent protection in demanding low-voltage power-distribution systems. Part of the ABB SACE Emax E4 series, this four-pole withdrawable configuration combines a 4000 A rated uninterrupted current with the PR122/P-LI R4000 electronic overcurrent release.

The PR122/P-LI release provides long-time overload and instantaneous short-circuit protection. These LI functions protect high-current conductors, switchboards and connected equipment against sustained overloads and severe short-circuit faults, making the breaker suitable for major industrial, commercial and infrastructure power-distribution networks.

This model is the four-pole withdrawable moving part of the E4S4000 circuit breaker and is designed for use with the corresponding ABB SACE Emax fixed part. It combines a 75 kA ultimate short-circuit breaking capacity at 400 V AC with four auxiliary contacts and open/closed position indication, providing robust protection together with service-friendly withdrawable construction.

Key Advantages

• High-current 4000 A SACE Emax air circuit breaker moving part.
• PR122/P-LI R4000 electronic release provides long-time overload and instantaneous short-circuit protection.
• Four-pole configuration supports three-phase distribution systems requiring neutral switching.
• Withdrawable construction facilitates inspection, maintenance and circuit-breaker servicing.
• 75 kA ultimate and service short-circuit breaking capacity across the specified AC voltage range.
• 75 kA short-time withstand current for both 1 s and 3 s.
• Four auxiliary contacts and open/closed position indication support switchboard signalling and control.

Key Features

• ABB SACE Emax E4S4000 air circuit breaker moving part.
• 4000 A rated uninterrupted current.
• Four-pole withdrawable version.
• PR122/P-LI R4000 electronic overcurrent release.
• L protection: long-time overload protection.
• I protection: instantaneous short-circuit protection.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 75 kA rated ultimate short-circuit breaking capacity.
• 75 kA rated service short-circuit breaking capacity.
• Four auxiliary contacts for signalling and control.
• Integrated circuit-breaker open/closed position indication.

Reliable LI Protection for 4000 A Power Distribution

The ABB SACE Emax E4S4000 is designed for switching and protection at main incomer and high-current feeder levels within substantial low-voltage distribution systems. Its PR122/P-LI electronic release provides long-time protection against sustained overload conditions together with instantaneous intervention against severe short-circuit currents, helping protect conductors, switchboards and connected electrical equipment.

The combination of a 4000 A current rating, four-pole construction, 75 kA short-circuit capability and withdrawable design makes the 1SDA056811R1 suitable for critical high-capacity switchboards where electrical performance and serviceability are both important. When installed with the corresponding fixed part, the moving circuit breaker can be withdrawn for inspection and maintenance, supporting efficient servicing of major power-distribution assemblies.

Typical Applications

• Main low-voltage distribution switchboards.
• High-current industrial power-distribution systems.
• Manufacturing and process plants.
• Commercial and infrastructure electrical installations.
• Transformer secondary and main incomer protection.
• High-current feeder protection.
• Withdrawable switchgear and power-distribution assemblies.