1SDA056351R1 ABB E3H 800 PR123/P-LSIG 800A 4P Fixed Air Circuit Breaker

Why Choose the ABB E3H 800 PR123/P-LSIG 800A 4P Fixed Air Circuit Breaker?

The ABB 1SDA056351R1 is a high-performance SACE Emax E3H air circuit breaker designed for switching and protection in demanding low-voltage power distribution systems. Rated at 800 A, this four-pole fixed circuit breaker incorporates ABB's advanced PR123/P-LSIG R800 electronic overcurrent release, providing comprehensive protection for industrial, commercial and infrastructure electrical networks.

Part of the ABB SACE Emax E3 series, the E3H 800 combines an 800 A current rating with the high short-circuit performance of the E3H frame. The E3H performance level provides an ultimate short-circuit breaking capacity of up to 100 kA at 415 V AC, making the breaker suitable for installations where substantial prospective fault currents require robust interruption capability.

The PR123/P-LSIG electronic release provides long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I) and earth-fault (G) protection. This version features a four-pole fixed configuration with rear horizontal terminals and is supplied with four auxiliary contacts plus circuit-breaker open/closed position indication for integration into compatible low-voltage switchboards.

Key Advantages

• 800 A SACE Emax air circuit breaker for demanding low-voltage distribution systems.
• E3H high-breaking-capacity performance for installations with substantial prospective fault currents.
• Advanced PR123/P-LSIG electronic trip unit with overload, short-circuit and earth-fault protection.
• 100 kA ultimate short-circuit breaking capacity at 415 V AC.
• Four-pole configuration for comprehensive switching and protection.
• Suitable for low-voltage AC distribution systems with operational voltages up to 690 V AC.
• Fixed construction with rear horizontal terminals for permanent switchboard installation.
• Four auxiliary contacts and open/closed indication support monitoring and control integration.

Key Features

• ABB SACE Emax E3H 800 air circuit breaker.
• 800 A rated current.
• Four-pole configuration.
• PR123/P-LSIG R800 electronic overcurrent release.
• LSIG protection: long-time, short-time, instantaneous and earth-fault functions.
• 690 V AC rated operational voltage.
• 100 kA ultimate short-circuit breaking capacity at 415 V AC.
• High short-time withstand performance for selective distribution protection.
• Fixed breaker construction.
• Rear horizontal terminal arrangement.
• Four auxiliary contacts.
• Circuit-breaker open/closed position indication.

Advanced LSIG Protection for High-Fault-Level Distribution

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

The PR123/P-LSIG release combines long-time, short-time, instantaneous and earth-fault protection functions for comprehensive protection and coordination within sophisticated electrical networks. Combined with the E3H breaker's high short-circuit interruption capability and fixed rear-horizontal-terminal arrangement, the 1SDA056351R1 is well suited to permanent switchboard installations requiring advanced electronic protection.

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.
• Critical installations requiring comprehensive LSIG electronic protection.