1SDA056474R1 ABB E3H2500 PR121/P-LSIG 2500A 4P Fixed Air Circuit Breaker

Why Choose the ABB E3H2500 PR121/P-LSIG 2500A 4P Fixed Air Circuit Breaker?

The ABB E3H2500 PR121/P-LSIG, order code 1SDA056474R1, is a high-performance SACE Emax air circuit breaker designed for protection and switching in demanding low-voltage electrical distribution systems. This E3H breaker has a rated current of 2500 A, a four-pole configuration and ABB's PR121/P-LSIG R2500 electronic overcurrent release.

Designed for fixed installation with rear horizontal terminals, the E3H2500 provides robust permanent integration into compatible low-voltage switchboards and power distribution assemblies. Its H performance level provides a rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC, supporting installations with substantial prospective fault currents.

The PR121/P-LSIG electronic release provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. Combined with its 2500 A rating, four-pole architecture, 690 V AC rated voltage and fixed construction, the 1SDA056474R1 is well suited to main incomers, high-current feeders and critical industrial power distribution circuits.

Key Advantages

• High-performance 2500 A SACE Emax air circuit breaker for demanding low-voltage distribution.
• Four-pole configuration for applications requiring switching and protection of three phases and neutral.
• PR121/P-LSIG electronic overcurrent release provides comprehensive overload, short-circuit and earth-fault protection.
• Fixed construction with rear horizontal terminals for permanent switchboard integration.
• High E3H short-circuit performance with 100 kA Icu at 400 V AC.
• Four auxiliary change-over contacts and open/closed position indication support monitoring and control.

Key Features

• ABB SACE Emax E3H air circuit breaker.
• 2500 A rated uninterrupted current.
• Four-pole configuration.
• PR121/P-LSIG R2500 electronic overcurrent release.
• LSIG protection functions for long-time, short-time, instantaneous and earth-fault protection.
• Overload release current setting range of 1000–2500 A.
• Short-time delayed short-circuit adjustment range of 2500–25000 A.
• Instantaneous short-circuit adjustment range of 3750–37500 A.
• Rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC.
• Rated service short-circuit breaking capacity of 85 kA at 400 V AC.
• Fixed version with rear horizontal terminals.
• Four auxiliary change-over contacts with circuit-breaker open/closed position indication.

Comprehensive LSIG Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H2500 protect high-current electrical distribution systems against damaging overload, short-circuit and earth-fault conditions. The PR121/P-LSIG electronic release combines long-time overload, short-time delayed short-circuit, instantaneous short-circuit and ground-fault protection, providing comprehensive LSIG protection for important low-voltage distribution circuits.

The fixed construction and rear horizontal terminals support permanent integration into suitably designed switchboards. With its 2500 A rating, four-pole architecture and E3H short-circuit performance, the E3H2500 provides robust switching and protection for demanding industrial and infrastructure power distribution systems.

Typical Applications

• Main incoming protection for industrial low-voltage switchboards.
• High-current feeder and distribution circuit protection.
• Manufacturing plants and process facilities.
• Commercial and infrastructure power distribution systems.
• Motor control centres and large electrical distribution assemblies.
• Fixed switchgear requiring coordinated overload, short-circuit and earth-fault protection.