1SDA055673R1 ABB E1B 1600 PR121/P-LSI 1600 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E1B 1600 PR121/P-LSI Air Circuit Breaker?

The ABB E1B 1600 PR121/P-LSI, order code 1SDA055673R1, is a SACE Emax fixed air circuit breaker designed for high-current low-voltage power distribution and protection. This four-pole configuration is rated at 1,600 A and features rear horizontal terminals with a PR121/P-LSI R1600 electronic overcurrent release.

The PR121/P-LSI release provides long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection. Its LSI protection functions support coordinated protection of feeders, busbars, transformers and other distribution circuits where adjustable overload and short-circuit protection is required.

The E1B performance level provides a rated ultimate short-circuit breaking capacity of 42 kA at 400/415 V AC and a rated short-time withstand current of 42 kA for 1 s. The breaker also incorporates four auxiliary contacts for open/closed status signalling, supporting integration into switchboard monitoring and control systems.

Key Advantages

• High-current 1,600 A SACE Emax air circuit breaker for demanding distribution systems.
• PR121/P-LSI electronic trip unit provides long-time, short-time and instantaneous protection.
• Four-pole fixed configuration supports three-phase four-wire distribution applications.
• Rear horizontal terminals provide a practical busbar connection arrangement.
• 42 kA Icu at 400/415 V AC.
• 42 kA short-time withstand current for 1 s.
• Four auxiliary contacts support circuit-breaker open/closed status signalling.

Key Features

• ABB SACE Emax E1B series.
• 1,600 A rated uninterrupted current.
• Four-pole configuration.
• Fixed execution.
• Rear horizontal terminals.
• PR121/P-LSI R1600 electronic overcurrent release.
• Long-time overload protection.
• Short-time delayed short-circuit protection.
• Instantaneous short-circuit protection.
• 42 kA Icu at 400/415 V AC.
• 42 kA Icw for 1 s.
• Adjustable overload and short-circuit protection settings.
• Four auxiliary contacts for open/closed status indication.
• Optional motor operating mechanism.

Adjustable LSI Protection for High-Current Distribution

The ABB SACE Emax E1B combines 1,600 A switching capability with adjustable electronic protection for demanding low-voltage distribution circuits. Its PR121/P-LSI R1600 release provides long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection, helping safeguard cables, busbars, transformers and downstream equipment against sustained overloads and severe fault currents.

The four-pole fixed construction with rear horizontal terminals is designed for permanent installation in compatible low-voltage switchboards. Its four-pole arrangement supports three-phase four-wire distribution applications, while four auxiliary contacts provide open/closed status information for signalling, supervisory and control systems.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Three-phase four-wire distribution networks.
• Transformer secondary distribution circuits.
• Generator and standby power distribution.
• Manufacturing and process plant switchgear.
• Commercial and infrastructure electrical installations.
• High-current feeder and busbar protection.