1SDA055963R1 ABB E2S1250 1250 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2S1250 1SDA055963R1 Air Circuit Breaker?

The ABB E2S1250 1SDA055963R1 is a high-performance SACE Emax air circuit breaker (ACB) designed for protection and switching in high-current low-voltage electrical distribution systems. Part of the proven ABB SACE Emax E2 series, this four-pole fixed circuit breaker combines a 1250 A rated current with the advanced PR122/P-LI electronic trip unit for dependable overload and instantaneous short-circuit protection.

Designed for demanding industrial and commercial power distribution applications, the E2S1250 provides reliable circuit protection while supporting effective coordination within low-voltage switchboards. The PR122/P electronic release provides measurement and protection functionality, while the LI configuration supplies long-time overload and instantaneous short-circuit protection.

This model is a four-pole fixed circuit breaker equipped with horizontal rear terminals for integration into compatible switchboard assemblies. Its 1250 A current rating, E2S performance class and robust Emax construction make it suitable for main distribution, feeder and industrial power applications where dependable high-current protection is required.

Key Advantages

• High-current 1250 A air circuit breaker for low-voltage power distribution.
• PR122/P-LI electronic trip unit provides overload and instantaneous short-circuit protection.
• Four-pole configuration supports switching and protection of three phases and neutral.
• Fixed execution for permanent installation within compatible switchboards.
• Horizontal rear terminals provide practical busbar and switchboard connection.
• Supplied with four auxiliary contacts and open/closed circuit-breaker position indication.

Key Features

• ABB SACE Emax E2S1250 air circuit breaker.
• 1250 A rated current.
• 4-pole configuration.
• PR122/P-LI electronic overcurrent release.
• LI protection functions: long-time and instantaneous.
• Fixed (F) circuit-breaker execution.
• Horizontal rear (HR) terminals.
• Four auxiliary contacts.
• Open/closed circuit-breaker position indication.
• Designed for demanding low-voltage power distribution applications.

Reliable Protection for High-Current Distribution Systems

Air circuit breakers such as the ABB E2S1250 provide switching and protection at the main and distribution levels of low-voltage electrical installations. Their high current capability and electronic protection technology make them particularly suitable for switchboards supplying industrial machinery, infrastructure, commercial facilities and other substantial electrical loads.

The PR122/P-LI electronic trip unit provides long-time protection against sustained overloads together with instantaneous protection against severe short-circuit currents. Combined with the robust SACE Emax platform, this configuration delivers dependable protection for critical low-voltage distribution equipment.

Typical Applications

• Main low-voltage switchboards and distribution boards.
• Industrial power distribution systems.
• Manufacturing and process plants.
• Commercial and infrastructure electrical installations.
• Transformer secondary protection.
• High-current feeder circuits and machinery supplies.