1SDA055962R1 ABB E2S1250 1250 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2S1250 1SDA055962R1 Air Circuit Breaker?

The ABB E2S1250 1SDA055962R1 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 electronic PR121/P-LSIG trip unit for comprehensive overload, short-time, instantaneous and earth-fault protection.

Designed for demanding industrial and commercial power distribution applications, the E2S1250 provides reliable circuit protection and supports selective coordination within low-voltage switchboards. Its PR121/P-LSIG electronic release provides L, S, I and G protection functions, helping protect conductors and connected equipment against overloads, short circuits and earth faults.

This model is a four-pole fixed circuit breaker from the E2S performance class and is suitable for AC distribution systems with operational voltages up to 690 V AC. Its robust construction and electronic protection technology make it well suited to main distribution, feeder and industrial power applications where dependable high-current circuit protection is essential.

Key Advantages

• High-current 1250 A air circuit breaker for low-voltage power distribution.
• PR121/P-LSIG electronic trip unit provides comprehensive circuit protection.
• Long-time, short-time, instantaneous and earth-fault protection.
• Four-pole fixed configuration for permanent switchboard installation.
• Suitable for operational voltages up to 690 V AC.
• E2S short-circuit performance class for demanding industrial distribution applications.

Key Features

• ABB SACE Emax E2S1250 air circuit breaker.
• 1250 A rated current.
• 4-pole configuration.
• PR121/P-LSIG electronic release.
• LSIG protection functions: long-time, short-time, instantaneous and earth fault.
• Fixed (F) circuit-breaker execution.
• Designed for low-voltage AC power distribution.
• Electronic protection supports selective and coordinated distribution systems.
• Suitable for main incomer and feeder protection applications.

Comprehensive Protection for High-Current Distribution Systems

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

The PR121/P-LSIG electronic trip unit provides four principal protection functions. Long-time protection responds to sustained overloads, short-time and instantaneous functions protect against short-circuit currents, while the G function adds earth-fault protection for enhanced coverage of the electrical distribution system.

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.