1SDA056364R1 ABB E3H 800 PR122/P-LSI 800A 4P Withdrawable Air Circuit Breaker

Why Choose the ABB E3H 800 PR122/P-LSI 800A 4P Withdrawable Air Circuit Breaker?

The ABB 1SDA056364R1 is a high-performance SACE Emax E3H air circuit breaker moving part designed for switching and protection in demanding low-voltage power distribution systems. Rated at 800 A, this four-pole withdrawable circuit breaker incorporates an ABB PR122/P-LSI R800 electronic overcurrent release, providing long-time, short-time and instantaneous overcurrent protection.

Part of the ABB SACE Emax E3 series, the E3H 800 combines an 800 A current rating with high short-circuit interruption capability. It provides a rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC and a rated service short-circuit breaking capacity of 85 kA at 400 V AC, making it suitable for distribution systems with substantial prospective fault currents.

The PR122/P-LSI release provides long-time overload (L), short-time short-circuit (S) and instantaneous short-circuit (I) protection. This version is supplied as a four-pole withdrawable moving part for use with the corresponding SACE Emax E3 fixed part and is fitted with four auxiliary change-over contacts plus circuit-breaker open/closed position indication.

Key Advantages

• 800 A SACE Emax air circuit breaker for demanding low-voltage power distribution.
• E3H high-breaking-capacity performance for systems with substantial prospective fault currents.
• PR122/P-LSI electronic trip unit provides long-time, short-time and instantaneous protection.
• 100 kA ultimate short-circuit breaking capacity at 400 V AC.
• 85 kA service short-circuit breaking capacity at 400 V AC.
• 75 kA short-time withstand current for 1 s supports selective protection strategies.
• Four-pole withdrawable construction supports inspection, servicing and breaker replacement.
• Four auxiliary change-over contacts and open/closed indication support switchboard monitoring and control.

Key Features

• ABB SACE Emax E3H 800 air circuit breaker moving part.
• 800 A rated uninterrupted current.
• Four-pole configuration.
• PR122/P-LSI R800 electronic overcurrent release.
• LSI protection: long-time, short-time and instantaneous functions.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 100 kA Icu at 400 V AC.
• 85 kA Ics at 400 V AC.
• 75 kA Icw for 1 s and 65 kA for 3 s.
• Withdrawable moving-part construction for use with a compatible Emax E3 fixed part.

Selective LSI Protection with Withdrawable Construction

Air circuit breakers such as the ABB E3H 800 provide switching, isolation and automatic protection for important low-voltage distribution circuits. The PR122/P electronic release monitors circuit current and commands the breaker to open when configured overload or short-circuit thresholds are exceeded, helping protect conductors, busbars, switchgear and connected equipment.

The PR122/P-LSI release adds short-time protection to the long-time and instantaneous functions, supporting coordinated and selective protection in complex distribution networks. Combined with 100 kA Icu at 400 V AC, substantial short-time withstand capability and withdrawable construction, the 1SDA056364R1 is particularly suited to switchboards where high fault-interruption performance and serviceability are important.

Typical Applications

• Main incoming protection in low-voltage switchboards.
• Industrial power distribution systems.
• High-fault-level feeder and distribution circuits.
• Manufacturing and process plant electrical systems.
• Commercial and infrastructure power distribution.
• Transformer-fed low-voltage distribution boards.
• Generator and standby power switchboards.
• Withdrawable switchgear requiring coordinated LSI protection and service-friendly breaker replacement.