1SDA056356R1 ABB E3H800 PR122/P-LSI 800A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E3H800 PR122/P-LSI 800A 3-Pole Withdrawable Air Circuit Breaker?

The ABB E3H800 PR122/P-LSI, order code 1SDA056356R1, is a high-performance SACE Emax air circuit breaker (ACB) moving part designed for switching and protection in demanding low-voltage electrical distribution systems. As part of the ABB SACE Emax E3 series, this three-pole withdrawable breaker combines an 800 A rated uninterrupted current with the PR122/P-LSI R800 electronic overcurrent release.

The PR122/P-LSI trip unit provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. This LSI configuration supports selective coordination and dependable protection against sustained overloads and short-circuit faults, making the breaker suitable for industrial, commercial and infrastructure power distribution applications.

With an 800 A rated current, three-pole configuration and withdrawable moving-part construction, the E3H800 is suited to switchboards where high fault interruption performance and maintainability are required. The E3H performance level provides a rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC, while the moving part is equipped with four auxiliary change-over contacts and circuit-breaker open/closed position indication.

Key Advantages

• High-performance ABB SACE Emax E3H air circuit breaker moving part for demanding low-voltage distribution systems.
• 800 A rated uninterrupted current for substantial electrical loads.
• Three-pole configuration for three-phase electrical distribution systems.
• Advanced PR122/P-LSI R800 electronic overcurrent release.
• Long-time, short-time and instantaneous overcurrent protection.
• 100 kA rated ultimate short-circuit breaking capacity at 400 V AC.
• Withdrawable construction supports convenient inspection, servicing and replacement.
• Four auxiliary change-over contacts provide useful circuit-breaker status signalling.

Key Features

• ABB SACE Emax E3H800 air circuit breaker moving part.
• 800 A rated uninterrupted current.
• Three-pole (3P) configuration.
• PR122/P-LSI electronic overcurrent release.
• R800 release rating.
• Long-time overload protection (L).
• Short-time short-circuit protection (S).
• Instantaneous short-circuit protection (I).
• Withdrawable (W) execution.
• Moving part (MP) for the withdrawable SACE Emax system.
• 690 V rated voltage.
• 100 kA rated ultimate short-circuit breaking capacity at 400 V AC.
• Four auxiliary change-over contacts.
• Circuit-breaker open/closed position indication.
• Optional motor drive capability.

High-Performance Circuit Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H800 provide switching, isolation and overcurrent protection for important low-voltage distribution circuits. The electronic trip unit monitors current conditions and initiates circuit-breaker operation when configured protection thresholds are exceeded, helping protect cables, switchgear and connected electrical equipment against damaging overloads and short circuits.

The PR122/P-LSI release provides three complementary levels of overcurrent protection. Long-time protection responds to sustained overloads, short-time protection supports selective fault clearing, and instantaneous protection provides rapid interruption of severe short-circuit currents. Combined with the E3H breaker's high short-circuit performance and withdrawable construction, the 1SDA056356R1 is well suited to distribution systems requiring both robust protection and serviceability.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• Industrial power distribution systems.
• Transformer and generator distribution systems.
• Commercial and infrastructure electrical installations.
• Manufacturing and process facilities.
• Incomer and high-capacity feeder protection.