1SDA056432R1 ABB E3H 2000 PR121/P-LI 2000A 3P Fixed Air Circuit Breaker

Why Choose the ABB E3H 2000 PR121/P-LI 2000A 3P Fixed Air Circuit Breaker?

The ABB 1SDA056432R1 is a high-performance SACE Emax E3H air circuit breaker designed for switching and protection in demanding low-voltage power distribution systems. Rated at 2000 A, this three-pole fixed circuit breaker incorporates an ABB PR121/P-LI R2000 electronic overcurrent release, providing dependable overload and instantaneous short-circuit protection.

Part of the ABB SACE Emax E3 series, the E3H 2000 combines a 2000 A continuous current rating with high short-circuit interruption capability. It provides a rated ultimate short-circuit breaking capacity of 100 kA at 400 V AC and a rated service short-circuit breaking capacity of 85 kA at 400 V AC, making it suitable for installations with substantial prospective fault currents.

The PR121/P-LI release provides long-time overload (L) and instantaneous short-circuit (I) protection. This version uses a three-pole fixed configuration with rear horizontal flat terminals and is fitted with four change-over auxiliary contacts plus circuit-breaker open/closed position indication for integration into low-voltage switchboards.

Key Advantages

• 2000 A SACE Emax air circuit breaker for high-current low-voltage distribution.
• E3H high-breaking-capacity performance for systems with substantial prospective fault currents.
• PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection.
• 100 kA ultimate short-circuit breaking capacity at 400 V AC.
• 85 kA service short-circuit breaking capacity at 400 V AC.
• 75 kA short-time withstand current for 1 s supports demanding distribution applications.
• Adjustable overload protection from 800–2000 A.
• Three-pole fixed construction with rear horizontal terminals provides a robust permanent switchboard arrangement.
• Four change-over auxiliary contacts and open/closed indication support switchboard monitoring and control.

Key Features

• ABB SACE Emax E3H 2000 air circuit breaker.
• 2000 A rated uninterrupted current.
• Three-pole configuration.
• PR121/P-LI R2000 electronic overcurrent release.
• LI protection: long-time overload and instantaneous short-circuit functions.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 100 kA Icu at 400 V AC.
• 85 kA Ics at 400 V AC.
• 75 kA Icw for 1 s and 65 kA for 3 s.
• Fixed construction with rear horizontal flat terminal connections.

High-Performance LI Protection for 2000A Power Distribution

Air circuit breakers such as the ABB E3H 2000 provide switching, isolation and automatic protection for important low-voltage distribution circuits. The PR121/P electronic release monitors circuit current and commands the breaker to open when configured overload or instantaneous short-circuit thresholds are exceeded, helping protect conductors, busbars, switchgear and connected equipment.

The combination of LI electronic protection, 100 kA Icu at 400 V AC and 75 kA short-time withstand capability for 1 s makes the 1SDA056432R1 suitable for demanding high-current distribution. Its fixed construction and rear horizontal flat terminals provide a robust arrangement for permanent installation within compatible low-voltage switchboards.

Typical Applications

• Main incoming protection in low-voltage switchboards.
• Industrial power distribution systems.
• High-fault-level feeder and distribution circuits.
• Manufacturing and process plant electrical systems.
• Commercial and infrastructure power distribution.
• Transformer-fed low-voltage distribution boards.
• Generator and standby power switchboards.
• Fixed switchgear requiring high-current LI electronic protection.