1SDA056481R1 ABB Emax E3H2500 PR121/P-LSI 2500 A 3-Pole Air Circuit Breaker

Why Choose the ABB 1SDA056481R1 Emax E3H2500 Air Circuit Breaker?

The ABB 1SDA056481R1 is a high-performance SACE Emax E3H2500 air circuit breaker moving portion designed for protection and switching in demanding low-voltage electrical distribution systems. Part of the ABB SACE Emax series, this three-pole withdrawable breaker combines a 2500 A rated current with the PR121/P-LSI electronic overcurrent release.

Designed for industrial power distribution, main switchboards and critical electrical installations, the E3H2500 provides dependable protection against overloads and short circuits. The PR121/P-LSI electronic trip unit provides long-time, short-time and instantaneous protection functions, supporting selective coordination and reliable fault protection across high-current distribution networks.

With a rated uninterrupted current of 2500 A, a three-pole configuration and rated operational voltage up to 690 V AC, the 1SDA056481R1 is suited to demanding power-distribution applications. The E3H performance level provides an ultimate short-circuit breaking capacity of 100 kA at 220–500 V AC and 85 kA at 660–690 V AC, while its withdrawable moving-portion construction supports convenient servicing and replacement within compatible SACE Emax switchgear.

Key Advantages

• Heavy-duty ABB SACE Emax air circuit breaker moving portion for low-voltage power distribution.
• 2500 A rated uninterrupted current for high-current industrial and infrastructure applications.
• Three-pole configuration for three-phase electrical distribution systems.
• PR121/P-LSI electronic overcurrent release for comprehensive circuit protection.
• Long-time, short-time and instantaneous protection functions.
• 100 kA ultimate short-circuit breaking capacity at 220–500 V AC.
• 75 kA short-time withstand current for 1 s for demanding fault conditions.
• Withdrawable moving-portion construction supports convenient inspection, servicing and replacement.

Key Features

• ABB SACE Emax E3H2500 air circuit breaker moving portion.
• 2500 A rated uninterrupted current.
• Three-pole construction.
• PR121/P-LSI electronic protection release.
• LSI protection comprising long-time, short-time and instantaneous functions.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 100 kA Icu at 220–500 V AC.
• 85 kA Icu at 660–690 V AC.
• 85 kA Ics at 220–690 V AC.
• 75 kA Icw for 1 s and 65 kA for 3 s.
• Withdrawable moving-portion configuration for compatible SACE Emax switchgear.
• Fitted with four auxiliary contacts for open/closed circuit-breaker status.
• IP2X degree of protection.

Advanced Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H2500 provide switching, isolation and overcurrent protection for high-current low-voltage electrical networks. They are commonly installed as incoming, feeder or distribution protection devices in industrial switchboards where dependable interruption of substantial fault currents and coordinated circuit protection are essential.

The PR121/P-LSI electronic release provides long-time protection against sustained overloads, short-time protection that can support selective coordination during short-circuit conditions, and instantaneous protection against severe faults. Combined with the E3H breaker’s high breaking performance, 2500 A current rating and withdrawable construction, this makes the 1SDA056481R1 well suited to demanding industrial and infrastructure power-distribution installations.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Manufacturing and process plant electrical systems.
• Transformer and generator distribution protection.
• High-current incoming and feeder protection.
• Commercial and infrastructure electrical installations.
• Withdrawable switchgear and power distribution assemblies.