1SDA055986R1 ABB E2S1600 PR121/P-LSIG 1600A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2S1600 PR121/P-LSIG 1600A Air Circuit Breaker?

The ABB E2S1600 PR121/P-LSIG, order code 1SDA055986R1, is a high-performance three-pole fixed air circuit breaker (ACB) designed for switching and protection in demanding low-voltage electrical distribution systems. Part of the established ABB SACE Emax series, this E2S circuit breaker combines a rated current of 1600 A with the PR121/P electronic overcurrent release for dependable protection in industrial, commercial and infrastructure power networks.

This configuration is supplied as a fixed three-pole circuit breaker with horizontal rear terminals and an R1600 PR121/P-LSIG electronic overcurrent release. The LSIG trip unit provides long-time, short-time, instantaneous and ground-fault protection functions, helping protect electrical systems against sustained overloads, short circuits and earth faults while supporting coordinated protection throughout the distribution network.

The E2S performance level provides an ultimate and service short-circuit breaking capacity of 85 kA at 415 V AC and 65 kA at 690 V AC, together with a short-time withstand current of 65 kA for 1 s. Four auxiliary contacts and open/closed position indication support remote status signalling, monitoring and integration into high-current low-voltage switchboards.

Key Advantages

• High-performance ABB SACE Emax E2S air circuit breaker for demanding low-voltage power distribution.
• 1600 A rated current for high-current industrial and commercial installations.
• Three-pole fixed configuration for three-phase electrical distribution systems.
• PR121/P-LSIG electronic overcurrent release for comprehensive circuit protection.
• Long-time, short-time, instantaneous and ground-fault protection against multiple electrical fault conditions.
• 85 kA ultimate and service short-circuit breaking capacity at 415 V AC.
• 65 kA short-time withstand current for 1 s for robust fault-current performance.
• Horizontal rear terminals support efficient integration into switchboards and power distribution assemblies.

Key Features

• ABB SACE Emax E2S series.
• 1600 A rated uninterrupted current.
• Three-pole construction.
• Fixed installation version.
• Horizontal rear terminals (HR).
• PR121/P electronic overcurrent release.
• R1600 release rating.
• LSIG protection: long-time, short-time, instantaneous and ground-fault.
• 690 V AC rated operational voltage.
• 85 kA breaking capacity at 415 V AC.
• 65 kA breaking capacity at 690 V AC.
• Four auxiliary contacts plus open/closed position indication.

Advanced Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax E2S1600 provide switching, isolation and protection for high-current low-voltage distribution circuits. The E2S performance class combines high short-circuit interruption capability with robust short-time withstand performance, making this breaker suitable for main distribution boards, incomers, feeders and other critical positions where substantial prospective fault currents may be present.

The PR121/P electronic overcurrent release provides comprehensive LSIG protection for demanding electrical networks. Long-time protection responds to sustained overloads, short-time protection supports selective coordination during fault events, instantaneous protection rapidly interrupts severe short circuits, and ground-fault protection detects potentially damaging earth-fault currents within the distribution system.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Main incomer and high-current feeder protection.
• Manufacturing and process plants.
• Commercial buildings and infrastructure installations.
• Motor control centres and power distribution assemblies.
• Transformer secondary and generator distribution circuits.
• High fault-level systems requiring integrated ground-fault protection.