1SDA059311R1 ABB E2S1000 PR121/P-LSIG 1000A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2S1000 PR121/P-LSIG 1000A 4-Pole Fixed Air Circuit Breaker?

The ABB E2S1000 PR121/P-LSIG, order code 1SDA059311R1, is a high-performance 1000 A four-pole fixed air circuit breaker designed for switching and protecting demanding low-voltage power distribution systems. As part of the proven ABB SACE Emax E2S series, it combines robust switching performance with comprehensive electronic overcurrent and earth-fault protection for industrial, commercial and infrastructure switchgear.

This Emax circuit breaker is equipped with the PR121/P-LSIG R1000 electronic trip unit, providing long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I) and earth-fault (G) protection. The LSIG protection package helps safeguard cables, busbars, transformers, switchgear and connected equipment while supporting coordinated protection throughout the electrical distribution system.

With a rated current of 1000 A and rated operational voltage of up to 690 V AC, the E2S1000 is suitable for installations with demanding prospective fault currents. This model features a four-pole fixed construction with rear horizontal terminals, together with four auxiliary contacts and circuit-breaker open/closed position indication for integration into compatible SACE Emax switchboards.

Key Advantages

• Heavy-duty 1000 A air circuit breaker for low-voltage power distribution.
• Four-pole configuration for switching and protecting three-phase systems with neutral.
• PR121/P-LSIG R1000 electronic trip unit provides comprehensive LSIG protection.
• Dedicated earth-fault protection (G) supplements overload and short-circuit protection.
• 85 kA Icu and Ics at 400/415 V AC for demanding fault conditions.
• 65 kA short-time withstand current for 1 s.
• Fixed construction with rear horizontal terminals for permanent switchboard installation.
• Part of the established ABB SACE Emax air circuit breaker platform.

Key Features

• ABB SACE Emax E2S air circuit breaker.
• 1000 A rated current.
• Four-pole construction.
• PR121/P-LSIG R1000 electronic overcurrent release.
• Long-time overload protection (L).
• Short-time short-circuit protection (S).
• Instantaneous short-circuit protection (I).
• Earth-fault protection (G).
• Fixed version with rear horizontal terminals (F HR).
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Four auxiliary contacts with circuit-breaker open/closed position indication.

Reliable Circuit Protection for Power Distribution

Air circuit breakers such as the ABB SACE Emax E2S are designed to switch and protect high-current low-voltage distribution circuits. The electronic trip unit monitors circuit conditions and initiates breaker operation when configured protection thresholds are exceeded, helping safeguard cables, busbars, transformers, switchgear and connected equipment against damaging overload, short-circuit and earth-fault conditions.

The PR121/P-LSIG release provides long-time, short-time, instantaneous and earth-fault protection, while the E2S performance level delivers substantial fault interruption capability. Combined with its four-pole fixed construction and rear horizontal terminals, the E2S1000 is well suited to main and feeder protection where high fault-current capability, neutral switching and comprehensive electronic protection are required.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Commercial building electrical distribution.
• Manufacturing and process plant switchgear.
• Three-phase four-wire distribution systems.
• Transformer and feeder protection.
• Systems requiring earth-fault protection.
• Infrastructure and utility installations.
• Protection of busbars and high-current distribution circuits.