1SDA056161R1 ABB E3N 3200 PR121/P-LSI 3200 A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB E3N 3200 PR121/P-LSI Air Circuit Breaker?

The ABB E3N 3200 PR121/P-LSI, order code 1SDA056161R1, is a high-performance SACE Emax air circuit breaker (ACB) moving part designed for switching and protection of high-current low-voltage power distribution systems. Part of the proven ABB SACE Emax E3 series, this three-pole withdrawable breaker combines a 3200 A rated current with the PR121/P-LSI electronic overcurrent release for dependable protection in demanding industrial and commercial installations.

The PR121/P-LSI electronic trip unit provides long-time, short-time and instantaneous overcurrent protection. These LSI functions help safeguard electrical networks against overload and short-circuit conditions while supporting selective coordination with other protective devices throughout the low-voltage distribution system.

With a rated operational voltage of 690 V AC and a rated ultimate short-circuit breaking capacity of 65 kA, the E3N 3200 is suited to demanding main distribution and high-power switchboard applications. This version is a three-pole withdrawable moving part fitted with four auxiliary contacts and circuit-breaker open/closed position indication.

Key Advantages

• Heavy-duty 3200 A air circuit breaker for high-current power distribution.
• PR121/P-LSI electronic overcurrent release for dependable circuit protection.
• LSI functions provide long-time, short-time and instantaneous protection.
• Three-pole withdrawable moving-part configuration supports maintainable switchgear installations.
• 65 kA short-circuit breaking capacity across demanding low-voltage applications.
• Four auxiliary contacts and open/closed position indication support switchboard monitoring and control.

Key Features

• ABB SACE Emax E3N series.
• 3200 A rated uninterrupted current.
• 690 V AC rated operational voltage.
• PR121/P-LSI electronic trip unit.
• Long-time, short-time and instantaneous overcurrent protection.
• Three-pole construction.
• Withdrawable moving part (WMP) configuration.
• 65 kA rated ultimate short-circuit breaking capacity at 400 V AC.
• 65 kA rated short-time withstand current for 1 s.
• Four auxiliary contacts with circuit-breaker open/closed position indication.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB E3N protect high-current low-voltage distribution circuits by interrupting the supply when electrical conditions exceed configured protection thresholds. The electronic trip unit continuously monitors circuit conditions, helping safeguard conductors, switchgear and connected equipment against damaging overload and short-circuit events.

The PR121/P-LSI release combines essential electronic protection functions with the robust E3N breaker platform. Its withdrawable construction facilitates isolation, inspection and maintenance when installed with the corresponding fixed part, making this version particularly suitable for critical switchboards where serviceability and dependable protection are important.

Typical Applications

• Main low-voltage distribution switchboards.
• Industrial power distribution systems.
• Manufacturing and process plants.
• Commercial and infrastructure electrical installations.
• Transformer-fed low-voltage distribution circuits.
• Withdrawable switchgear and high-current control assemblies.