1SDA055668R1 ABB E1B 1600 PR122/P-LSI 1600A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E1B 1600 PR122/P-LSI 1600A Air Circuit Breaker?

The ABB E1B 1600 PR122/P-LSI, order code 1SDA055668R1, is a high-performance 1600 A three-pole fixed air circuit breaker designed for protection and switching in demanding low-voltage electrical distribution systems. Part of the proven ABB SACE Emax / New Emax range, it combines robust E1B short-circuit performance with a PR122/P-LSI R1600 electronic overcurrent release.

The fitted PR122/P-LSI R1600 electronic trip unit provides long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection. This LSI protection configuration supports selective and coordinated protection strategies, helping safeguard cables, busbars, switchgear and connected equipment against damaging overcurrent and short-circuit conditions.

This model is supplied in a fixed three-pole configuration with horizontal rear terminals for permanent installation within compatible low-voltage switchboards. With 42 kA rated ultimate and service short-circuit breaking capacity across 220–690 V AC, four auxiliary contacts and open/closed circuit-breaker position indication, it is well suited to high-current industrial distribution duties.

Key Advantages

• High-current 1600 A air circuit breaker for demanding low-voltage distribution systems.
• PR122/P-LSI R1600 electronic trip unit provides adjustable electronic overcurrent protection.
• LSI protection functions cover long-time overload, short-time delayed and instantaneous short-circuit faults.
• 42 kA Icu and Ics across 220–690 V AC.
• 42 kA short-time withstand current for 1 s supports demanding distribution applications.
• Fixed construction provides a robust solution for permanent switchboard installation.
• Horizontal rear terminals provide a practical connection arrangement for switchboard busbars.
• Four auxiliary contacts support remote circuit-breaker status signalling.

Key Features

• ABB SACE Emax E1B series.
• 1600 A rated current.
• Three-pole configuration.
• PR122/P-LSI R1600 electronic overcurrent release.
• Long-time (L) overload protection.
• Short-time (S) delayed short-circuit protection.
• Instantaneous (I) short-circuit protection.
• 690 V AC rated operational voltage.
• 42 kA rated ultimate short-circuit breaking capacity.
• 42 kA rated service short-circuit breaking capacity.
• 42 kA Icw for 1 s and 36 kA for 3 s.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• Fixed construction with horizontal rear terminals (HR).

Selective LSI Protection for High-Current Distribution

Air circuit breakers such as the ABB SACE Emax E1B protect high-current electrical distribution systems by detecting and interrupting abnormal current conditions before cables, busbars, switchgear and connected equipment can be damaged. The E1B 1600 combines a continuous current capability of 1600 A with 42 kA ultimate and service short-circuit breaking capacities across its specified 220–690 V AC operating range.

The PR122/P-LSI electronic release combines long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection within one trip unit. The short-time function supports selective protection strategies by allowing coordinated fault-clearing with downstream protective devices, while the fixed construction and horizontal rear terminals provide a robust arrangement for permanent switchboard installations.

Typical Applications

• Industrial low-voltage distribution switchboards.
• Main incoming and feeder circuit protection.
• High-current three-phase distribution systems.
• Manufacturing plants and production facilities.
• Commercial and infrastructure electrical distribution systems.
• Motor control centres and industrial power systems.
• Generator and transformer distribution installations.
• Fixed switchboard installations requiring selective LSI protection.