1SDA059345R1 ABB E3H1000 PR121/P-LI 1000 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA059345R1 E3H1000 Air Circuit Breaker?

The ABB 1SDA059345R1 is a high-performance SACE Emax E3H air circuit breaker (ACB) designed for protection, switching and isolation in demanding low-voltage electrical distribution systems. Identified by ABB as E3H1000PR121/P-LIIn=1000A3pFH, this three-pole fixed circuit breaker combines a 1000 A rated current with a PR121/P-LI electronic overcurrent release.

As part of the ABB New Emax product family, the E3H1000 is engineered for industrial, commercial and infrastructure applications requiring high short-circuit performance. The PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection, while the E3H performance level delivers an ultimate short-circuit breaking capacity of 100 kA at 400 V AC.

The 1SDA059345R1 is a three-pole fixed circuit breaker with rear horizontal terminals, rated for operation up to 690 V AC. It is supplied with four auxiliary change-over contacts and circuit-breaker open/closed position indication, supporting integration into sophisticated low-voltage switchboards and control systems.

Key Advantages

• Heavy-duty ABB SACE Emax E3H air circuit breaker for demanding power distribution applications.
• 1000 A rated current for high-current electrical installations.
• Three-pole fixed configuration for three-phase distribution systems.
• Advanced PR121/P-LI electronic overcurrent release.
• 100 kA ultimate short-circuit breaking capacity at 400 V AC.
• 85 kA service short-circuit breaking capacity at 400 V AC.
• Rear horizontal terminals for switchboard integration.
• Four auxiliary change-over contacts and open/closed position indication.

Key Features

• ABB SACE New Emax E3H series.
• 1000 A rated current.
• Three-pole construction.
• Fixed version.
• Rear horizontal terminals.
• PR121/P-LI electronic trip unit.
• LI protection functions: long-time overload and instantaneous short-circuit protection.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 100 kA Icu at 380–500 V AC.
• 85 kA Icu at 660–690 V AC.

Reliable High-Capacity Circuit Protection

Air circuit breakers such as the ABB SACE Emax E3H protect high-current low-voltage distribution systems against potentially damaging overload and short-circuit conditions. The E3H performance class combines substantial current-carrying capability with high fault interruption performance, making it suitable for main distribution circuits where prospective short-circuit currents can be significant.

The PR121/P-LI electronic release monitors the protected circuit and provides long-time overload and instantaneous short-circuit protection. Combined with the breaker’s fixed construction, rear horizontal terminals and auxiliary signalling contacts, this provides a robust solution for integration into industrial and commercial low-voltage switchboards.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• Industrial power distribution systems.
• Commercial building electrical infrastructure.
• Manufacturing and process plants.
• Transformer secondary protection.
• Generator distribution systems.
• Main incomer and high-current feeder protection.
• Installations requiring high short-circuit breaking capacity.