1SDA055833R1 ABB E2B2000 PR121/P-LSI 2000A 4-Pole Fixed Air Circuit Breaker

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

The ABB 1SDA055833R1 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-LSI R2000 electronic overcurrent release for reliable protection of industrial and commercial power networks.

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

The E2B2000 PR121/P-LSI is a four-pole fixed circuit breaker with rear horizontal terminals, a rated uninterrupted current of 2000 A and a rated operational voltage of 690 V AC. Its E2B performance level provides a rated ultimate short-circuit breaking capacity of 42 kA at 400 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 distribution systems.
• Electronic PR121/P-LSI R2000 overcurrent release.
• LSI protection provides long-time, short-time and instantaneous protection.
• 42 kA ultimate short-circuit breaking capacity at 400 V AC.
• Adjustable overload protection from 800–2000 A.
• Adjustable short-time short-circuit protection from 2000–20000 A.
• Fixed construction with rear horizontal terminals for integration into low-voltage switchboards.

Key Features

• ABB SACE Emax E2B2000 air circuit breaker.
• 2000 A rated uninterrupted current.
• Four-pole configuration.
• Fixed circuit-breaker construction.
• PR121/P-LSI R2000 electronic overcurrent release.
• Long-time, short-time and instantaneous LSI protection functions.
• 690 V AC rated operational voltage.
• 42 kA short-circuit breaking performance at 400 V AC.
• Rear horizontal main terminals.
• Four auxiliary contacts with circuit-breaker open/closed position indication.
• High mechanical endurance for demanding switchboard applications.
• Designed for industrial and commercial low-voltage power distribution.

Reliable Protection for High-Current Four-Wire Distribution

Air circuit breakers such as the ABB E2B2000 provide switching, isolation and protection for high-current low-voltage distribution circuits. The four-pole configuration is particularly suited to three-phase four-wire systems where the neutral conductor is switched together with the three phase conductors, supporting effective isolation and distribution-system control.

The PR121/P-LSI electronic release provides long-time protection against sustained overloads, short-time protection for short-circuit coordination and instantaneous protection against severe fault currents. Adjustable protection settings allow the E2B2000 to be coordinated with other protective devices throughout industrial and commercial electrical distribution systems.

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.