1SDA055626R1 ABB E1B 800 PR121/P-LSIG 800A 4-Pole Air Circuit Breaker

Why Choose the ABB E1B 800 PR121/P-LSIG 800A Air Circuit Breaker?

The ABB E1B 800 PR121/P-LSIG, order code 1SDA055626R1, is a high-performance 800 A four-pole air circuit breaker moving part designed for protection and switching in low-voltage electrical distribution systems. As part of the established ABB SACE Emax series, it combines robust circuit-breaking performance with a PR121/P-LSIG electronic overcurrent release for comprehensive protection of industrial power networks.

This E1B circuit breaker is supplied in a withdrawable moving-part configuration, allowing the breaker to be disconnected and removed from its compatible fixed part for inspection, servicing or replacement. The PR121/P-LSIG electronic trip unit provides long-time, short-time, instantaneous and earth-fault protection functions, helping protect electrical installations against overloads, short circuits and earth faults.

With a rated uninterrupted current of 800 A, four-pole construction and a rated ultimate short-circuit breaking capacity of 42 kA at 415 V AC, the E1B 800 is engineered for demanding industrial distribution applications. The moving part is also fitted with four auxiliary contacts and circuit-breaker open/closed position indication for integration into switchboard control and monitoring systems.

Key Advantages

• Robust 800 A air circuit breaker for low-voltage power distribution.
• Four-pole configuration suitable for three-phase and neutral distribution systems.
• PR121/P-LSIG electronic trip unit provides comprehensive electronic circuit protection.
• LSIG protection functions cover overload, short-time short circuit, instantaneous short circuit and earth-fault conditions.
• 42 kA rated ultimate short-circuit breaking capacity at 415 V AC.
• 42 kA short-time withstand current for 1 s for demanding distribution applications.
• Withdrawable moving-part design supports efficient inspection, servicing and replacement.
• Four auxiliary contacts and open/closed position indication support switchboard monitoring and control.

Key Features

• ABB SACE Emax E1B series.
• 800 A rated uninterrupted current.
• Four-pole configuration.
• PR121/P-LSIG R800 electronic overcurrent release.
• Long-time (L) overload protection.
• Short-time (S) short-circuit protection.
• Instantaneous (I) short-circuit protection.
• Earth-fault (G) protection.
• 42 kA Icu at 415 V AC.
• 42 kA Icw for 1 s.
• Withdrawable circuit-breaker moving part.
• Four auxiliary contacts with open/closed position indication.

Reliable Protection for Low-Voltage Distribution Systems

Air circuit breakers such as the ABB SACE Emax E1B protect high-current electrical distribution systems by interrupting abnormal current conditions before cables, switchgear and connected equipment can be damaged. The E1B performance level provides substantial short-circuit capability, making this breaker suitable for main distribution boards and industrial installations where high prospective fault currents can occur.

The PR121/P-LSIG electronic release combines long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection in one trip unit. This broad protection coverage helps safeguard both the electrical distribution network and connected equipment, while the withdrawable construction facilitates maintenance and replacement within compatible SACE Emax switchgear assemblies.

Typical Applications

• Industrial low-voltage distribution switchboards.
• Main incoming and distribution circuit protection.
• Four-pole three-phase and neutral distribution systems.
• Manufacturing plants and production facilities.
• Commercial and infrastructure electrical distribution systems.
• Motor control centres and industrial power systems.
• Generator and transformer distribution installations.
• Power distribution panels requiring withdrawable circuit breakers.