1SDA059174R1 ABB E1B 1000A 3-Pole Withdrawable Air Circuit Breaker PR121/P-LSI

Why Choose the ABB 1SDA059174R1 E1B 1000 PR121/P-LSI Air Circuit Breaker?

The ABB 1SDA059174R1 is a SACE Emax E1B 1000 air circuit breaker designed for protection and switching in low-voltage power distribution systems. Rated at 1000 A, this three-pole breaker combines a withdrawable construction with an ABB PR121/P-LSI electronic trip unit for dependable circuit protection.

As part of the ABB SACE Emax range, the E1B 1000 is intended for demanding industrial and commercial switchboards where high-current switching, protection and serviceability are required. The withdrawable configuration allows the breaker moving part to be disconnected from its compatible fixed part for inspection, maintenance or replacement without changing the main switchboard architecture.

The integrated PR121/P-LSI trip unit provides long-time, short-time and instantaneous protection, while the breaker has a rated current of 1000 A and a three-pole configuration. This combination makes the 1SDA059174R1 suitable for protecting feeders, distribution circuits and other high-current low-voltage installations.

Key Advantages

• 1000 A rated current for substantial low-voltage distribution loads.
• PR121/P-LSI electronic trip unit provides long-time, short-time and instantaneous protection functions.
• Three-pole configuration for three-phase electrical distribution systems.
• Withdrawable construction supports inspection, maintenance and breaker replacement.
• Part of the proven ABB SACE Emax E1B air circuit breaker platform.
• Suitable for protection and switching in demanding industrial and commercial switchboards.
• Electronic protection provides greater flexibility than basic thermal-magnetic protection arrangements.

Key Features

• ABB SACE Emax E1B 1000 air circuit breaker.
• 1000 A rated current (In).
• Three-pole construction.
• Withdrawable version.
• Electronic PR121/P protection trip unit.
• LSI protection functions: long-time, short-time and instantaneous.
• Designed for low-voltage AC power distribution.
• Suitable for main and feeder circuit protection within compatible switchgear assemblies.
• Withdrawable format supports maintainable switchboard installations.

Electronic Protection for Low-Voltage Power Distribution

Air circuit breakers are commonly used to protect and control high-current low-voltage distribution circuits, helping interrupt fault currents and isolate electrical equipment when required. Withdrawable air circuit breakers are particularly useful in switchboards where maintainability and the ability to remove the breaker moving part are important operational considerations.

The PR121/P-LSI electronic trip unit fitted to the ABB 1SDA059174R1 provides long-time protection against sustained overload conditions, short-time protection for selected short-circuit conditions and instantaneous protection for severe faults. Combined with the E1B breaker platform and 1000 A current rating, it provides a versatile protection solution for industrial and commercial power distribution.

Typical Applications

• Main low-voltage distribution switchboards.
• Industrial power distribution systems.
• High-current feeder protection.
• Manufacturing and process plant switchgear.
• Commercial building electrical distribution.
• Infrastructure and utility distribution assemblies.
• Withdrawable low-voltage switchgear installations.