1SDA056505R1 ABB E3H3200PR121/P-LSI 3200 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E3H3200PR121/P-LSI Air Circuit Breaker?

The ABB E3H3200PR121/P-LSI is a high-performance four-pole fixed air circuit breaker (ACB) designed for protection, switching and isolation in demanding low-voltage electrical distribution systems. Part of the established ABB SACE Emax E3H series, this configuration combines a 3200 A rated uninterrupted current with the PR121/P-LSI R3200 electronic overcurrent release.

The PR121/P-LSI R3200 electronic trip unit provides long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection. These LSI functions help protect conductors, busbars, switchgear and connected equipment against sustained overloads and severe short circuits while supporting selective coordination within high-current distribution networks.

The ABB 1SDA056505R1 is specifically configured as a four-pole fixed E3H3200 circuit breaker with rear horizontal terminals. It is rated for operation up to 690 V AC, provides an ultimate short-circuit breaking capacity of 100 kA at 220–500 V AC, and incorporates four auxiliary contacts with circuit-breaker open/closed position indication.

Key Advantages

• High-performance ABB SACE Emax E3H air circuit breaker for demanding low-voltage distribution systems.
• 3200 A rated uninterrupted current for high-current electrical installations.
• Four-pole configuration for four-conductor switching and protection.
• PR121/P-LSI R3200 electronic trip unit provides long-time, short-time and instantaneous protection.
• 100 kA Icu at 220–500 V AC for installations with substantial prospective fault currents.
• Fixed construction with rear horizontal terminals for permanent switchboard installations.
• Auxiliary contacts and open/closed position indication support circuit-breaker monitoring and control.

Key Features

• ABB SACE Emax E3H series.
• 3200 A rated uninterrupted current.
• Four-pole circuit breaker configuration.
• PR121/P-LSI R3200 electronic overcurrent release.
• LSI protection functions: long-time, short-time and instantaneous.
• 690 V AC rated operational voltage.
• 100 kA Icu at 220–500 V AC.
• 85 kA Icu at 660–690 V AC.
• Fixed execution with rear horizontal terminals.
• Four auxiliary contacts with circuit-breaker open/closed position indication.

Selective LSI Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H provide protection, switching and isolation for major low-voltage distribution circuits. The E3H platform combines high short-circuit interruption capability with electronic protection, making it suitable for main incomers, bus couplers, high-current feeders and other critical circuits where substantial load and prospective fault currents may occur.

The PR121/P-LSI R3200 release combines long-time protection against sustained overloads, short-time delayed protection for coordinated short-circuit clearing and instantaneous protection against severe faults. Together with its fixed four-pole construction and rear horizontal terminals, the E3H3200 provides a robust solution for permanently installed high-current switchboards and power-distribution assemblies.

Typical Applications

• Main low-voltage distribution switchboards.
• Industrial power distribution systems.
• Main incomer and bus-coupler applications.
• High-current distribution feeders.
• Commercial and infrastructure electrical installations.
• Manufacturing plants and process facilities.
• Generator and transformer distribution systems.