1SDA056305R1 ABB E3S 3200 PR121/P-LSI 3200A 3P Fixed Air Circuit Breaker

Why Choose the ABB E3S 3200 PR121/P-LSI 3200A 3P Fixed Air Circuit Breaker?

The ABB 1SDA056305R1 is a high-performance SACE Emax E3S air circuit breaker designed for switching and protection in demanding high-current low-voltage power distribution systems. Rated at 3200 A, this three-pole fixed circuit breaker incorporates an ABB PR121/P-LSI electronic overcurrent release for comprehensive overload and short-circuit protection.

Part of the proven ABB SACE Emax E3 series, the E3S 3200 combines substantial current-handling capability with strong short-circuit performance. Its S performance level provides rated ultimate and service short-circuit breaking capacities of 75 kA across specified AC voltages up to 690 V AC, making it suitable for demanding main distribution, feeder and industrial switchboard applications.

The PR121/P-LSI release provides long-time overload (L), short-time short-circuit (S) and instantaneous short-circuit (I) protection. This version uses a three-pole fixed configuration with rear flat horizontal terminals and includes four auxiliary contacts with open/closed position indication for integration into low-voltage switchboards and control systems.

Key Advantages

• High-current 3200 A SACE Emax air circuit breaker for demanding power distribution.
• Three-pole fixed configuration for permanent switchboard installations.
• PR121/P-LSI electronic trip unit provides long-time, short-time and instantaneous protection.
• 75 kA ultimate and service short-circuit breaking capacity at 400 V AC.
• Suitable for AC distribution systems with operational voltages up to 690 V AC.
• Rear flat horizontal terminals support practical switchboard busbar connections.
• Four auxiliary contacts with open/closed position indication support monitoring and control.

Key Features

• ABB SACE Emax E3S 3200 air circuit breaker.
• 3200 A rated uninterrupted current.
• Three-pole configuration.
• PR121/P-LSI electronic overcurrent release.
• LSI protection: long-time, short-time and instantaneous functions.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 75 kA rated ultimate short-circuit breaking capacity at 400 V AC.
• 75 kA rated service short-circuit breaking capacity at 400 V AC.
• 75 kA short-time withstand current for 1 s.
• Fixed construction with rear flat horizontal terminal connections.

Reliable LSI Protection for High-Current Distribution

Air circuit breakers such as the ABB E3S 3200 provide switching, isolation and automatic protection for high-current low-voltage distribution circuits. The electronic release monitors circuit current and commands the breaker to open when configured overload or short-circuit thresholds are exceeded, helping protect conductors, switchgear and connected electrical equipment.

The PR121/P-LSI release combines long-time overload, short-time short-circuit and instantaneous short-circuit protection, allowing coordinated protection within complex distribution networks. Together with the E3S breaker's 75 kA short-circuit capability and fixed rear horizontal connection arrangement, the 1SDA056305R1 is well suited to permanent switchboard installations requiring dependable high-current protection.

Typical Applications

• Main incoming protection in low-voltage switchboards.
• Industrial power distribution systems.
• High-current feeder and distribution circuits.
• Manufacturing and process plant electrical systems.
• Commercial and infrastructure power distribution.
• Transformer and generator distribution switchboards.
• Fixed switchgear installations requiring coordinated LSI protection.