1SDA055993R1 ABB E2S1600 PR121/P-LSI 1600 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E2S1600 PR121/P-LSI 1SDA055993R1 Air Circuit Breaker?

The ABB 1SDA055993R1 is a high-performance SACE Emax E2S1600 air circuit breaker designed for reliable switching and protection in low-voltage electrical distribution systems. As part of the ABB New Emax product range, this four-pole fixed circuit breaker has a rated uninterrupted current of 1600 A and incorporates the PR121/P-LSI electronic overcurrent release.

The PR121/P-LSI trip unit provides comprehensive long-time, short-time and instantaneous overcurrent protection, helping safeguard electrical installations against overloads and short circuits. The E2S performance class combines high short-circuit breaking capability with dependable operation for demanding industrial, commercial and infrastructure power distribution applications.

With a rated operational voltage of up to 690 V AC, a four-pole configuration and fixed construction with rear flat horizontal terminals, the E2S1600 is well suited to high-current switchboards and distribution panels. It provides a rated ultimate and service short-circuit breaking capacity of 85 kA at 380–440 V AC and 65 kA at 500–690 V AC.

Key Advantages

• Heavy-duty ABB SACE Emax air circuit breaker for low-voltage power distribution.
• 1600 A rated uninterrupted current for high-current electrical systems.
• PR121/P-LSI electronic release provides long-time, short-time and instantaneous protection.
• Four-pole configuration suitable for switching and protecting four-pole distribution circuits.
• 85 kA breaking capacity at common 380–440 V AC system voltages.
• Rated operational voltage of up to 690 V AC.
• Fixed construction with rear flat horizontal terminals for switchboard installation.

Key Features

• ABB SACE Emax E2S1600 circuit breaker.
• 1600 A rated uninterrupted current.
• Four-pole configuration.
• PR121/P-LSI electronic overcurrent release.
• LSI protection provides long-time, short-time and instantaneous overcurrent protection.
• 85 kA Icu/Ics at 220–440 V AC.
• 65 kA Icu/Ics at 500–690 V AC.
• Rated short-time withstand current of 65 kA for 1 s.
• 1000 V rated insulation voltage and 12 kV impulse withstand voltage.
• Fixed circuit-breaker design with rear flat horizontal terminals.
• Fitted with four auxiliary contacts and open/closed position indication.

Reliable Protection for Low-Voltage Distribution Systems

Air circuit breakers such as the ABB SACE Emax E2S1600 provide dependable switching and protection for high-current low-voltage distribution circuits. Their high breaking capacity enables substantial prospective fault currents to be interrupted safely, helping protect switchboards, conductors, transformers and connected electrical equipment.

The PR121/P-LSI electronic release provides long-time protection against sustained overload conditions, short-time protection that can support selective coordination and instantaneous protection against severe short-circuit currents. Combined with the E2S1600 frame and fixed four-pole construction, the 1SDA055993R1 is particularly suitable for industrial switchboards and main distribution systems requiring robust and configurable circuit protection.

Typical Applications

• Industrial low-voltage switchboards.
• Main electrical distribution panels.
• Incoming mains and feeder protection.
• Manufacturing and process industry electrical systems.
• Commercial and infrastructure power distribution.
• Transformer and installation protection.
• High-current four-pole distribution circuits.