1SDA056985R1 ABB E6H5000PR121/P-LSI 5000 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E6H5000PR121/P-LSI 5000 A Air Circuit Breaker?

The ABB E6H5000PR121/P-LSI, order code 1SDA056985R1, is a high-capacity SACE Emax E6 H air circuit breaker designed for protection, switching and isolation in demanding low-voltage power distribution systems. Rated at 5000 A, this four-pole fixed breaker combines the robust E6 frame with ABB's PR121/P-LSI electronic overcurrent release.

As part of the ABB SACE Emax range, the breaker is engineered for industrial switchboards, power distribution centres and infrastructure applications requiring dependable high-current circuit protection. The PR121/P trip unit provides LSI protection functions covering long-time overload, short-time short-circuit and instantaneous short-circuit protection.

This configuration is a four-pole fixed circuit breaker with rear horizontal terminals and a rated current of 5000 A. It is equipped with the PR121/P-LSI R5000 overcurrent release, four auxiliary contacts and open/closed breaker position indication, providing a comprehensive solution for high-capacity electrical distribution installations.

Key Advantages

• High-capacity 5000 A SACE Emax air circuit breaker for demanding power distribution systems.
• E6 H high-performance breaker platform for industrial low-voltage installations.
• PR121/P-LSI electronic overcurrent release for comprehensive circuit protection.
• LSI protection functions provide long-time overload, short-time and instantaneous short-circuit protection.
• Four-pole fixed configuration for high-current switchboard installations.
• Rear horizontal terminals support practical busbar connection within switchgear assemblies.
• Fitted with four auxiliary contacts and open/closed breaker position indication.
• High breaking performance suitable for demanding industrial distribution networks.

Key Features

• ABB SACE Emax E6 H series.
• 5000 A rated current.
• Four-pole configuration.
• Fixed execution.
• Rear horizontal terminals.
• PR121/P-LSI R5000 electronic overcurrent release.
• Long-time overload protection (L).
• Short-time short-circuit protection (S).
• Instantaneous short-circuit protection (I).
• 100 kA rated ultimate short-circuit breaking capacity at 400 V AC, 50 Hz.
• 690 V AC rated operational voltage.
• Four auxiliary contacts with open/closed breaker position indication.

Advanced Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E6 are designed to protect high-current low-voltage distribution systems against overloads and short-circuit faults. The E6 frame provides the current-carrying capacity required for major incoming feeders, distribution boards and other critical electrical infrastructure where reliable interruption of high fault currents is essential.

The PR121/P-LSI electronic release provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. Combined with the E6 H breaker's high breaking capability, these adjustable protection functions support coordinated protection of conductors, busbars and connected equipment in demanding industrial power systems.

Typical Applications

• Main incoming protection for high-current low-voltage switchboards.
• Industrial power distribution systems.
• Manufacturing and process plant electrical infrastructure.
• Power distribution centres and main switchboards.
• Transformer secondary and distribution applications.
• Commercial and infrastructure electrical installations.
• Critical power and large-scale electrical distribution networks.