1SDA056825R1 ABB E4H3200 PR121/P-LSI 3200 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E4H3200 PR121/P-LSI Air Circuit Breaker?

The ABB 1SDA056825R1 is a high-performance SACE Emax E4H air circuit breaker designed for switching and protection in high-current low-voltage electrical distribution systems. Identified as E4H3200 PR121/P-LSI, this four-pole fixed circuit breaker combines a 3200 A rated current with ABB's PR121/P-LSI electronic overcurrent release for dependable and selective circuit protection.

As part of the ABB SACE Emax / New Emax range, the E4H3200 is engineered for demanding industrial, commercial and infrastructure power distribution applications. Its H short-circuit performance level provides an ultimate short-circuit breaking capacity of 100 kA at 400 V AC and 85 kA at 690 V AC. The fixed construction with rear flat horizontal terminals provides a robust arrangement for permanent installation within low-voltage switchboards.

The integrated PR121/P-LSI electronic trip unit provides long-time overload (L), short-time short-circuit (S) and instantaneous short-circuit (I) protection. With a rated operational voltage of up to 690 V AC, four-pole configuration and 3200 A rated uninterrupted current, the 1SDA056825R1 is well suited to main incoming, feeder and distribution protection duties where high breaking capacity and four-pole switching are required.

Key Advantages

• High-capacity 3200 A air circuit breaker for demanding low-voltage power distribution.
• Four-pole configuration for three-phase four-wire electrical systems.
• PR121/P-LSI electronic trip unit provides long-time, short-time and instantaneous overcurrent protection.
• High 100 kA Icu at 400 V AC ultimate short-circuit breaking capacity.
• Maintains 85 kA Icu at 690 V AC for demanding higher-voltage distribution systems.
• 100 kA short-time withstand current for 1 s.
• Fixed construction with rear flat horizontal terminals for permanent switchboard installation.
• Fitted with four auxiliary contacts and circuit breaker open/closed position indication.

Key Features

• ABB SACE Emax E4H series.
• 3200 A rated uninterrupted current.
• Four-pole circuit breaker configuration.
• PR121/P-LSI electronic overcurrent release.
• Long-time overload, short-time and instantaneous short-circuit protection.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 100 kA Icu at 400 V AC.
• 85 kA Icu at 690 V AC.
• 100 kA rated short-time withstand current for 1 s.
• 75 kA rated short-time withstand current for 3 s.
• Fixed circuit breaker design with rear flat horizontal terminals.
• Fitted with four auxiliary contacts and open/closed position indication.

High Breaking Capacity with Selective Circuit Protection

Air circuit breakers such as the ABB E4H3200 provide switching and protection for high-current low-voltage distribution systems. The E4H performance level is designed for installations with substantial prospective fault currents, offering an ultimate short-circuit breaking capacity of 100 kA through the 220–500 V AC range and 85 kA at 660–690 V AC.

The PR121/P-LSI electronic release combines long-time overload, short-time and instantaneous short-circuit protection, allowing the breaker to protect against different overcurrent conditions while supporting selective coordination within the distribution system. Combined with four-pole construction, high breaking performance and a fixed rear-terminal arrangement, the 1SDA056825R1 is suitable for major switchboards and industrial distribution systems requiring robust and dependable protection.

Typical Applications

• Main incoming circuit protection in high-current low-voltage switchboards.
• Four-wire three-phase electrical distribution systems.
• Industrial power distribution systems.
• Transformer secondary distribution and protection.
• Protection of high-current distribution feeders and busbar systems.
• Large commercial and infrastructure electrical installations.
• Manufacturing plants and process facilities.
• High-fault-level switchgear and electrical distribution assemblies.