1SDA055787R1 ABB E1N 1600 PR122/P-LI 1600 A 4-Pole Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB 1SDA055787R1 E1N 1600 Air Circuit Breaker Moving Part?

The ABB 1SDA055787R1 is a SACE Emax E1N 1600 moving part for a withdrawable air circuit breaker, designed for high-current protection and switching in low-voltage AC power distribution systems. This four-pole unit has a rated current of 1600 A and is equipped with an electronic PR122/P-LI R1600 overcurrent release providing long-time overload and instantaneous short-circuit protection.

Part of the proven ABB SACE Emax range, the E1N 1600 combines dependable short-circuit performance with the serviceability of a withdrawable circuit-breaker arrangement. The E1N performance level provides rated ultimate and service short-circuit breaking capacities of 50 kA at 415 V AC, while the PR122/P electronic release provides precise protection for demanding industrial and commercial distribution systems.

The 1SDA055787R1 is a four-pole withdrawable (W) moving portion intended for use with the corresponding fixed part of an Emax withdrawable installation. It has a rated uninterrupted current of 1600 A, a rated operational voltage of 690 V AC, a rated insulation voltage of 1000 V and a rated impulse withstand voltage of 12 kV. Four auxiliary contacts and open/closed position indication are incorporated for switchboard signalling and monitoring.

Key Advantages

• High-current 1600 A E1N air circuit breaker moving part for low-voltage distribution.
• PR122/P-LI electronic overcurrent release provides long-time and instantaneous protection.
• 50 kA short-circuit breaking capacity at 415 V AC for demanding power systems.
• Four-pole configuration supports switching and protection in three-phase systems with neutral.
• Withdrawable design supports easier inspection, servicing and replacement within compatible Emax switchgear.
• 50 kA short-time withstand current for 1 s supports robust fault-current performance.
• Four auxiliary contacts and open/closed position indication support switchboard monitoring.

Key Features

• ABB SACE Emax E1N 1600 moving part.
• 1600 A rated current.
• 4-pole configuration.
• PR122/P-LI R1600 electronic release.
• LI protection provides long-time overload and instantaneous short-circuit protection.
• Withdrawable (W) circuit-breaker configuration.
• Designed as the moving portion for a compatible Emax fixed part.
• 690 V AC rated operational voltage.
• 50 kA rated ultimate short-circuit breaking capacity at 415 V AC.
• 50 kA rated service short-circuit breaking capacity at 415 V AC.
• 50 kA rated short-time withstand current for 1 s.
• Four auxiliary contacts with open/closed circuit-breaker position indication.

Reliable Withdrawable Protection for High-Current Distribution

Air circuit breakers such as the ABB SACE Emax E1N 1600 provide switching and overcurrent protection for high-current low-voltage distribution circuits. The PR122/P-LI electronic release monitors circuit current and provides long-time protection against sustained overloads together with instantaneous operation under severe short-circuit conditions, helping protect conductors, switchgear and connected equipment.

The withdrawable construction allows the circuit-breaker moving portion to be isolated and removed from its compatible fixed part, supporting inspection, maintenance and replacement strategies in critical switchboards. Combined with four-pole switching and 50 kA short-circuit performance, the 1SDA055787R1 is well suited to main incoming and high-current distribution applications where maintainability and reliable protection are important.

Typical Applications

• Industrial low-voltage distribution switchboards.
• Main incoming circuit protection.
• Four-pole power distribution systems.
• High-current feeder protection.
• Withdrawable switchgear assemblies.
• Manufacturing and process plants.
• Commercial and infrastructure electrical distribution.
• Power distribution systems requiring serviceable circuit-breaker arrangements.