1SDA059264R1 ABB E2N 1000A 4-Pole Withdrawable Air Circuit Breaker Moving Part PR121/P-LSI

Why Choose the ABB 1SDA059264R1 E2N 1000 PR121/P-LSI Air Circuit Breaker?

The ABB 1SDA059264R1 is a SACE Emax E2N 1000 air circuit breaker moving part designed for protection and switching in demanding low-voltage power distribution systems. Rated at 1000 A, this four-pole withdrawable breaker is equipped with an ABB PR121/P-LSI R1000 electronic overcurrent release for dependable circuit protection.

As part of the ABB SACE Emax range, the E2N 1000 combines high-current switching capability with a serviceable withdrawable construction. The 1SDA059264R1 is supplied as the withdrawable moving part (W MP) for use with a compatible fixed part and includes four auxiliary contacts with circuit-breaker open/closed position indication.

With a rated operational current of 1000 A, rated operational voltage of 690 V AC and four-pole construction, the 1SDA059264R1 provides a robust protection solution for substantial low-voltage distribution circuits requiring LSI electronic protection and withdrawable switchgear functionality.

Key Advantages

• 1000 A rated current for high-current low-voltage distribution applications.
• PR121/P-LSI electronic overcurrent release provides long-time, short-time and instantaneous protection.
• Four-pole configuration supports switching and protection across four conductors.
• Withdrawable moving-part construction supports inspection, servicing and breaker replacement.
• 65 kA breaking capacity up to 440 V AC provides substantial short-circuit performance.
• 55 kA breaking capacity at 500–690 V AC supports demanding higher-voltage distribution systems.
• Four auxiliary contacts provide circuit-breaker open/closed position signalling.
• Part of the established ABB SACE Emax E2N air circuit breaker platform.

Key Features

• ABB SACE Emax E2N 1000 air circuit breaker moving part.
• 1000 A rated current (In).
• Four-pole construction.
• Withdrawable version.
• Supplied as the moving part (MP).
• Electronic PR121/P-LSI R1000 overcurrent release.
• LSI protection functions: long-time, short-time and instantaneous.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 65 kA Icu/Ics at 220–440 V AC.
• 55 kA Icu/Ics at 500–690 V AC.
• 55 kA short-time withstand current for 1 s.
• Four auxiliary contacts with open/closed circuit-breaker position indication.

High-Performance LSI Protection with Withdrawable Switchgear

Air circuit breakers protect and control high-current low-voltage distribution circuits by interrupting overload and short-circuit faults while providing switching and isolation capability. The withdrawable construction of the ABB 1SDA059264R1 allows the breaker moving part to be removed from its compatible fixed assembly, supporting inspection, servicing and replacement within maintainable switchboard installations.

The PR121/P-LSI electronic overcurrent release provides long-time protection against sustained overloads, short-time protection for selected short-circuit conditions and instantaneous protection against severe faults. Combined with the E2N platform's short-circuit performance, 1000 A rating and four-pole configuration, the 1SDA059264R1 provides dependable protection for demanding industrial and commercial power distribution applications.

Typical Applications

• Main low-voltage distribution switchboards.
• Industrial power distribution systems.
• Four-pole feeder protection and switching.
• High-current distribution circuit protection.
• Transformer and installation protection.
• Manufacturing and process plant switchgear.
• Commercial and infrastructure electrical distribution.
• Withdrawable low-voltage switchgear installations.