1SDA071756R1 ABB E4.2V 2500 Ekip Touch LSIG 4p FHR Air Circuit Breaker

Why Choose the ABB E4.2V 2500 Ekip Touch LSIG 4p FHR Air Circuit Breaker?

The ABB 1SDA071756R1 is a high-performance Emax 2 air circuit breaker (ACB) designed for protection, switching and control in demanding low-voltage electrical distribution systems. Identified as the E4.2V 2500 Ekip Touch LSIG 4p FHR, this four-pole fixed circuit breaker combines a 2500 A rated current with ABB’s advanced Ekip Touch electronic trip unit for comprehensive protection of industrial and commercial power installations.

As part of the ABB SACE Emax 2 series, the E4.2V provides high short-circuit performance together with sophisticated electronic protection. The Ekip Touch LSIG release provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection, allowing the breaker to protect critical electrical infrastructure while supporting selective and coordinated power distribution.

With a rated operational voltage of up to 690 V AC, a rated current of 2500 A and an ultimate short-circuit breaking capacity of 150 kA at 400–415 V AC, the 1SDA071756R1 is engineered for installations with demanding fault levels. Its fixed four-pole construction and rear flat horizontal terminals make it suitable for integration into low-voltage switchboards and power-distribution assemblies.

Key Advantages

• High-performance ABB Emax 2 air circuit breaker for demanding low-voltage distribution systems.
• 2500 A rated current for high-current industrial and infrastructure applications.
• 150 kA Icu at 400–415 V AC for installations with high prospective fault currents.
• Four-pole configuration for switching and protection of three phases and neutral.
• Advanced Ekip Touch LSIG electronic trip unit with overload, short-circuit and earth-fault protection.
• 100 kA short-time withstand current for 1 s supports selective protection strategies.
• Fixed construction with rear flat horizontal terminals for switchboard integration.

Key Features

• ABB SACE Emax 2 E4.2V series.
• 2500 A rated uninterrupted current.
• 690 V AC rated operational voltage.
• 1000 V AC rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 150 kA Icu at 400–440 V AC.
• 100 kA Icu at 500–690 V AC.
• Ekip Touch LSIG electronic protection release.
• Integrated long-time, short-time, instantaneous and earth-fault protection.
• 4-pole fixed circuit breaker configuration.
• Rear flat horizontal main terminals.
• Designed and tested in accordance with IEC 60947-2.

Advanced Circuit Protection for High-Power Distribution

Air circuit breakers such as the ABB Emax 2 E4.2V provide switching, isolation and protection for high-current low-voltage electrical systems. The E4.2V performance level is designed for installations with substantial prospective short-circuit currents, delivering breaking capacity up to 150 kA at common industrial operating voltages.

The Ekip Touch LSIG electronic trip unit provides adjustable protection against overloads, delayed and instantaneous short circuits and earth faults. These functions support coordinated protection strategies and help minimise disruption by allowing protection settings to be matched to the characteristics and requirements of the electrical distribution system.

Typical Applications

• Main incomer protection in low-voltage switchboards.
• Industrial power distribution systems.
• Transformer and installation protection.
• Manufacturing and process plants.
• Commercial and infrastructure electrical distribution.
• Data centres and critical power systems.
• Utility and energy infrastructure.
• High-fault-level electrical installations.