1SDA055834R1 ABB E2B2000 PR121/P-LSIG 2000A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2B2000 PR121/P-LSIG 2000A 4-Pole Air Circuit Breaker?

The ABB 1SDA055834R1 is a high-performance SACE Emax E2B air circuit breaker (ACB) designed for switching and protection in high-current low-voltage electrical distribution systems. Rated at 2000 A, this four-pole fixed circuit breaker is equipped with the PR121/P-LSIG R2000 electronic overcurrent release for comprehensive protection of industrial and commercial power networks.

As part of the ABB SACE Emax / New Emax range, the E2B2000 combines robust switching performance with electronic circuit protection. The PR121/P-LSIG release provides long-time, short-time, instantaneous and ground-fault protection functions, helping protect cables, busbars, transformers and connected electrical equipment against overloads, short circuits and earth faults.

The E2B2000 PR121/P-LSIG is a four-pole fixed circuit breaker with rear horizontal terminals and a rated uninterrupted current of 2000 A. The E2B performance level provides a rated ultimate short-circuit breaking capacity of 42 kA at 415 V AC, making it suitable for demanding three-phase four-wire switchboards and high-current power distribution installations.

Key Advantages

• High-capacity 2000 A air circuit breaker for demanding low-voltage power distribution.
• Four-pole configuration suitable for three-phase four-wire electrical systems.
• Electronic PR121/P-LSIG R2000 overcurrent release.
• LSIG protection provides long-time, short-time, instantaneous and ground-fault protection.
• 42 kA ultimate short-circuit breaking capacity at 415 V AC.
• 42 kA short-time withstand current for 1 s.
• Fixed construction with rear horizontal terminals for switchboard integration.
• Four auxiliary contacts and circuit-breaker open/closed position indication.

Key Features

• ABB SACE Emax E2B2000 air circuit breaker.
• 2000 A rated current.
• Four-pole configuration.
• Fixed circuit-breaker construction.
• PR121/P-LSIG R2000 electronic overcurrent release.
• Long-time, short-time, instantaneous and ground-fault LSIG protection functions.
• 42 kA Icu at 415 V AC.
• 42 kA Icw for 1 s.
• Rear horizontal main terminals.
• Four auxiliary contacts.
• Circuit-breaker open/closed position indication.
• High mechanical and electrical endurance for demanding power distribution applications.

Comprehensive Protection for High-Current Power Distribution

Air circuit breakers such as the ABB E2B2000 provide switching, isolation and protection for high-current low-voltage distribution circuits. The four-pole construction is particularly suitable for three-phase four-wire systems where switching of the neutral conductor is required alongside the three phase conductors, supporting effective isolation and control of the complete circuit.

The PR121/P-LSIG electronic release provides comprehensive protection through long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault functions. This combination supports protection coordination throughout electrical distribution networks while providing additional protection against potentially damaging earth-fault conditions.

Typical Applications

• Industrial low-voltage switchboards and distribution panels.
• Three-phase four-wire electrical distribution systems.
• Main incoming circuit protection.
• High-current feeder protection.
• Busbar and bus-coupler applications.
• Transformer secondary distribution systems.
• Manufacturing and process plants.
• Commercial, infrastructure and utility power distribution.