1SDA059308R1 ABB E2S 1000 PR121/P-LSI 1000 A 4-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA059308R1 E2S 1000 Air Circuit Breaker?

The ABB 1SDA059308R1 is a high-performance SACE Emax E2S 1000 air circuit breaker designed for protection, switching and isolation in demanding low-voltage power distribution systems. Configured as E2S 1000 PR121/P-LSI In=1000A 4p W, it combines a 1000 A rated current, four-pole construction and ABB's PR121/P-LSI electronic overcurrent release.

The PR121/P-LSI release provides long-time, short-time and instantaneous protection functions, enabling the breaker to protect electrical distribution circuits against overloads and short circuits. The E2S performance level provides a rated ultimate short-circuit breaking capacity of 85 kA at 400 V AC, making this model suitable for distribution systems with demanding fault-level requirements.

The 1SDA059308R1 is supplied as a four-pole withdrawable moving part for use with the corresponding SACE Emax fixed part. Its withdrawable construction supports efficient inspection and servicing, while four auxiliary change-over contacts and circuit-breaker open/closed position indication provide useful status signalling for switchboard applications.

Key Advantages

• High-performance 1000 A E2S air circuit breaker for low-voltage power distribution.
• Four-pole configuration for switching and protection across four conductors.
• PR121/P-LSI electronic trip unit for comprehensive overcurrent protection.
• Long-time, short-time and instantaneous protection against overload and short-circuit conditions.
• Withdrawable moving-part construction supports efficient switchboard servicing and maintenance.
• 85 kA ultimate short-circuit breaking capacity at 400 V AC.
• 65 kA short-time withstand current for 1 s.
• Part of the proven ABB SACE Emax air circuit breaker platform.

Key Features

• ABB SACE Emax E2S 1000 air circuit breaker.
• 1000 A rated current.
• Four-pole construction.
• PR121/P-LSI electronic release.
• LSI protection functions for long-time, short-time and instantaneous protection.
• Withdrawable (W) execution.
• Moving-part (MP) configuration.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 85 kA rated ultimate and service short-circuit breaking capacity at 400 V AC.
• Four auxiliary change-over contacts with open/closed position indication.

Reliable Protection for Low-Voltage Power Distribution

The ABB SACE Emax E2S is designed to protect high-current low-voltage distribution circuits while also providing dependable switching and isolation. Its PR121/P-LSI electronic release combines long-time overload protection with short-time delayed and instantaneous short-circuit protection, supporting effective protection and coordination of feeders, busbars and connected electrical equipment.

The withdrawable construction of the 1SDA059308R1 makes it particularly suitable for switchboards where maintainability and operational flexibility are priorities. When used with the corresponding SACE Emax fixed part, the circuit-breaker moving assembly can be withdrawn for inspection, testing or servicing while permanent switchboard connections remain installed.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Commercial and infrastructure electrical distribution.
• Manufacturing and process plant switchgear.
• Protection of high-current feeders and distribution circuits.
• Four-pole distribution systems requiring LSI electronic protection.
• Withdrawable switchgear requiring high short-circuit breaking performance.