1SDA056841R1 ABB E4H3200 PR121/P-LSI 3200 A 4-Pole Withdrawable Air Circuit Breaker

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

The ABB 1SDA056841R1, also identified as EH432WPR121/P-LSI, is a high-performance SACE Emax E4H air circuit breaker moving part designed for switching and protection in high-current low-voltage electrical distribution systems. This four-pole withdrawable 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. The E4 frame with H performance level is intended for installations requiring substantial short-circuit breaking capability, while its withdrawable construction enables the breaker moving part to be disconnected from the corresponding fixed part for inspection, servicing or replacement.

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 3200 A rated current and four-pole configuration, the 1SDA056841R1 is well suited to main incoming, feeder and distribution protection duties where high fault-current performance, selective protection and serviceable withdrawable construction are required.

Key Advantages

• High-capacity 3200 A air circuit breaker moving part 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.
• E4H high-breaking-capacity platform for installations with substantial prospective fault currents.
• Short-time protection function supports selective coordination with downstream protective devices.
• Withdrawable construction supports efficient inspection, servicing and circuit breaker replacement.
• Designed as the moving part for use with a compatible ABB SACE Emax fixed part.
• Part of ABB's established SACE Emax / New Emax low-voltage circuit breaker family.

Key Features

• ABB SACE Emax E4H series.
• 3200 A rated current.
• Four-pole circuit breaker configuration.
• PR121/P-LSI electronic overcurrent release.
• Long-time overload (L) protection.
• Short-time short-circuit (S) protection.
• Instantaneous short-circuit (I) protection.
• Withdrawable moving-part design.
• E4 frame with H short-circuit performance level.
• Suitable for high-current three-phase power distribution.
• Designed for integration into compatible ABB SACE Emax switchgear assemblies.
• Serviceable construction suited to critical electrical distribution installations.

Selective High-Current Circuit Protection

Air circuit breakers such as the ABB E4H3200 are designed to provide switching and overcurrent protection in substantial low-voltage distribution systems. The E4H configuration combines the large E4 frame with ABB's H performance level, making it suitable for installations where high prospective fault currents demand robust circuit breaker performance.

The PR121/P-LSI electronic release provides three complementary protection functions. Long-time protection responds to sustained overload conditions, short-time protection responds to high fault currents with controlled timing to assist system selectivity, and instantaneous protection provides rapid interruption of severe short circuits. Combined with its four-pole and withdrawable configuration, the 1SDA056841R1 is suited to major switchboards where protection performance and maintainability are important requirements.

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 requiring withdrawable circuit breakers.