1SDA055985R1 ABB E2S1600 PR121/P-LSI 1600A 3-Pole Fixed Air Circuit Breaker

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

The ABB E2S1600 PR121/P-LSI, order code 1SDA055985R1, 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 flat terminals, providing a practical connection arrangement for integration into low-voltage switchboards. The fitted PR121/P-LSI R1600 electronic overcurrent release provides long-time, short-time and instantaneous protection functions, helping protect electrical systems against sustained overloads and short-circuit faults while supporting selective protection coordination.

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 circuit-breaker position indication support 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-LSI electronic overcurrent release for comprehensive overcurrent protection.
• Long-time, short-time and instantaneous protection against overload and short-circuit 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 flat 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 flat terminals (HR).
• PR121/P electronic overcurrent release.
• R1600 release rating.
• LSI protection: long-time, short-time and instantaneous.
• 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 offers strong short-circuit interruption capability, making this breaker suitable for main distribution boards, incomers, feeders and other critical positions where high prospective fault currents may be present.

The PR121/P electronic overcurrent release provides LSI protection for demanding electrical networks. Long-time protection responds to sustained overload conditions, short-time protection supports selective coordination during fault events, and instantaneous protection rapidly interrupts severe short-circuit currents to help safeguard conductors, switchgear and connected electrical equipment.

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 low-voltage switchgear systems.