1SDA057213R1 ABB E1B-A 800 PR121/P-LSI 800 A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA057213R1 E1B-A 800 Air Circuit Breaker?

The ABB 1SDA057213R1 is a SACE Emax E1B-A air circuit breaker moving part designed for protection and switching in low-voltage power distribution systems. Identified as E1B-A 800 PR121/P-LSI In=800A 3p W, this three-pole withdrawable breaker combines an 800 A rated current with the ABB PR121/P-LSI electronic overcurrent release.

Designed as a UL version of the ABB SACE Emax E1 platform, the breaker is suited to industrial and commercial installations requiring dependable overload and short-circuit protection. Its withdrawable moving-part construction supports isolation and removal from compatible switchgear for inspection, servicing or replacement without using a permanently fixed breaker arrangement.

The integrated PR121/P-LSI electronic trip unit provides long-time, short-time and instantaneous protection functions. The breaker is also supplied with four auxiliary contacts and circuit breaker open/closed position indication, providing useful status signalling for switchboard control and monitoring systems.

Key Advantages

• Genuine ABB SACE Emax E1B-A air circuit breaker moving part.
• 800 A rated current for low-voltage power distribution applications.
• PR121/P-LSI electronic overcurrent release for comprehensive circuit protection.
• LSI protection provides long-time, short-time and instantaneous protection functions.
• Three-pole withdrawable configuration for three-phase distribution systems.
• Supplied with four auxiliary contacts for circuit breaker status signalling.
• Open/closed position indication supports straightforward switchboard monitoring.
• Withdrawable construction supports efficient inspection, maintenance and replacement.

Key Features

• ABB SACE Emax E1B-A 800 air circuit breaker platform.
• 800 A rated current.
• Three-pole configuration.
• Withdrawable moving part construction.
• PR121/P-LSI electronic overcurrent release.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• R800 overcurrent release rating.
• Four auxiliary contacts.
• Circuit breaker open/closed position indication.
• UL-oriented E1B-A configuration for applicable low-voltage installations.

Electronic Circuit Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax E1B-A are used to switch and protect low-voltage distribution circuits carrying substantial electrical loads. When abnormal current conditions occur, the electronic release can initiate circuit interruption to help protect switchgear, conductors and connected equipment against damage caused by overloads and short circuits.

The PR121/P-LSI release provides three principal overcurrent protection functions. Long-time protection responds to sustained overload conditions, short-time protection allows controlled response to short-circuit currents and can support selective coordination, while instantaneous protection provides rapid interruption when severe short-circuit conditions occur.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Manufacturing and process facilities.
• Commercial building electrical distribution.
• Infrastructure power systems.
• Transformer secondary distribution.
• Generator distribution and protection systems.
• Switchgear requiring an 800 A three-pole withdrawable air circuit breaker with LSI electronic protection.