1SDA059387R1 ABB E3S1000 PR121/P-LI 1000 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA059387R1 E3S1000 Air Circuit Breaker?

The ABB 1SDA059387R1 is a high-performance SACE Emax E3S air circuit breaker (ACB) designed for reliable protection, switching and isolation in low-voltage electrical distribution systems. Identified by ABB as E3S1000PR121/P-LIIn=1000A4pFH, this four-pole fixed circuit breaker combines a 1000 A rated current with the PR121/P-LI electronic overcurrent trip unit.

As part of the ABB New Emax product family, the E3S1000 is engineered for demanding industrial, commercial and infrastructure power distribution applications. The PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection, helping protect distribution circuits and connected equipment against damaging overcurrent conditions.

The 1SDA059387R1 is supplied in a four-pole fixed configuration with horizontal rear terminals. Its four-pole construction allows the neutral conductor to be switched together with the three phase conductors where required, while the fixed design provides robust permanent integration into compatible low-voltage switchboard assemblies.

Key Advantages

• Heavy-duty ABB SACE Emax E3S air circuit breaker for low-voltage power distribution.
• 1000 A rated current for high-current electrical installations.
• Four-pole configuration for three-phase systems requiring neutral switching.
• Fixed construction for permanent switchboard installation.
• Horizontal rear terminals for practical switchboard integration.
• PR121/P-LI electronic trip unit for dependable circuit protection.
• Provides long-time overload and instantaneous short-circuit protection.
• Suitable for main incomer and feeder duties in industrial and commercial distribution systems.

Key Features

• ABB SACE New Emax E3S series.
• 1000 A rated current.
• Four-pole construction.
• Fixed version.
• Horizontal rear terminal configuration.
• PR121/P electronic trip unit.
• LI protection functions: long-time overload and instantaneous short-circuit protection.
• Electronic overcurrent protection for demanding low-voltage distribution systems.
• Designed for integration into compatible ABB SACE Emax switchboard assemblies.
• Robust construction for industrial and commercial power distribution applications.

Reliable Circuit Protection for Power Distribution

Air circuit breakers such as the ABB SACE Emax E3S protect high-current low-voltage distribution systems against overload and short-circuit conditions. Their robust switching mechanism and electronic protection technology make them suitable for important incoming and feeder circuits within industrial, commercial and infrastructure electrical installations.

The PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection. Combined with the four-pole fixed construction and horizontal rear terminals, the 1SDA059387R1 provides a practical solution for switchboards requiring dependable electrical protection, neutral switching and permanent breaker installation.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• Industrial power distribution systems.
• Commercial building electrical infrastructure.
• Manufacturing and process plants.
• Transformer secondary distribution systems.
• Generator distribution systems.
• Main incomer and high-current feeder protection.
• Four-pole distribution systems requiring neutral switching.