1SDA059355R1 ABB E3H1000 PR121/P-LSIG 1000 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA059355R1 E3H1000 Air Circuit Breaker?

The ABB 1SDA059355R1 is a high-performance SACE Emax E3H 1000 A four-pole fixed air circuit breaker designed for comprehensive protection and switching in demanding low-voltage electrical distribution systems. Part of the ABB New Emax product family, it combines a 1000 A rated current with the PR121/P-LSIG electronic overcurrent release for industrial, commercial and infrastructure power applications.

The E3H1000 is equipped with an ABB PR121/P-LSIG electronic trip unit, providing long-time, short-time, instantaneous and earth-fault protection functions. This LSIG protection package helps protect cables, busbars, switchgear and connected equipment against overload, short-circuit and earth-fault conditions while supporting coordinated protection within high-current electrical distribution networks.

This model features a four-pole fixed configuration with rear flat horizontal terminals for permanent switchboard installation. The E3H platform provides a rated service short-circuit breaking capacity of 85 kA across 220–690 V AC and a rated ultimate short-circuit breaking capacity of up to 100 kA at 220–500 V AC, while four auxiliary contacts and open/closed position indication support switchboard control and status signalling.

Key Advantages

• High-performance ABB SACE Emax air circuit breaker for demanding low-voltage power distribution.
• 1000 A rated current for industrial, commercial and infrastructure installations.
• Four-pole configuration for switching and protection of four conductors.
• PR121/P-LSIG electronic release provides long-time, short-time, instantaneous and earth-fault protection.
• 100 kA rated ultimate short-circuit breaking capacity at 220–500 V AC.
• 85 kA rated service short-circuit breaking capacity across 220–690 V AC.
• Fixed construction with rear flat horizontal terminals for permanent switchboard integration.
• Four auxiliary contacts and open/closed position indication support control and status signalling.

Key Features

• ABB SACE Emax E3H series.
• 1000 A rated uninterrupted current.
• Four-pole air circuit breaker.
• PR121/P-LSIG electronic overcurrent release.
• LSIG protection functions: long-time, short-time, instantaneous and earth-fault.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 100 kA ultimate breaking capacity at 220–500 V AC.
• 85 kA ultimate breaking capacity at 660–690 V AC.
• 75 kA short-time withstand current for 1 s.
• Fixed (F) execution with rear flat horizontal terminals.
• Four auxiliary contacts with open/closed position indication.

High-Performance Circuit Protection for Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H protect low-voltage electrical distribution systems against potentially damaging overload, short-circuit and earth-fault conditions. The electronic trip unit monitors circuit current and initiates breaker operation when configured protection thresholds are exceeded, helping safeguard cables, busbars, switchgear and connected electrical equipment.

The PR121/P-LSIG release combines long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection with the high fault-interruption capability of the E3H platform. Together with its 75 kA short-time withstand current for 1 s and fixed four-pole construction, the 1SDA059355R1 is well suited to critical distribution systems requiring comprehensive electronic protection and robust high-performance switchgear.

Typical Applications

• Industrial low-voltage switchboards.
• Main incoming and distribution circuits.
• Three-phase and four-wire electrical distribution systems.
• Manufacturing and process facilities.
• Commercial building power distribution.
• Electrical distribution panels and assemblies.
• Infrastructure and utility installations.
• Systems with high prospective short-circuit currents requiring fixed air circuit breakers.