1SDA056976R1 ABB E6H 5000 PR121/P-LI 5000 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA056976R1 E6H 5000 Air Circuit Breaker?

The ABB 1SDA056976R1 is a high-capacity SACE Emax E6H 5000 air circuit breaker (ACB) designed for protection and switching in demanding low-voltage power-distribution systems. Part of the ABB New Emax / SACE Emax range, this three-pole fixed circuit breaker combines a 5000 A rated current with the PR121/P-LI electronic overcurrent release.

The PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection. These protection functions help safeguard busbars, conductors, switchgear and connected equipment against sustained overcurrents and severe short-circuit faults in high-current distribution applications.

With a 5000 A rated uninterrupted current, three-pole fixed construction and rear flat horizontal terminals, the 1SDA056976R1 is engineered for permanent integration into high-capacity switchboards. The E6H performance level provides a rated ultimate and service short-circuit breaking capacity of 100 kA across operating voltages from 220 V to 690 V AC, together with a short-time withstand capability of 100 kA for 1 s.

Key Advantages

• High-capacity 5000 A air circuit breaker for demanding low-voltage power distribution.
• Three-pole fixed configuration for permanent switchboard installations.
• PR121/P-LI electronic overcurrent release with long-time and instantaneous protection.
• 100 kA ultimate short-circuit breaking capacity from 220–690 V AC.
• 100 kA service short-circuit breaking capacity from 220–690 V AC.
• 100 kA short-time withstand current for 1 s for demanding distribution applications.
• Rear flat horizontal terminals support integration with suitable high-current busbar systems.
• Four auxiliary contacts provide circuit-breaker open/closed status indication.

Key Features

• ABB SACE Emax E6H 5000 series.
• 5000 A rated current.
• Three-pole circuit-breaker configuration.
• Fixed installation version.
• PR121/P-LI R5000 electronic overcurrent release.
• Long-time (L) overload protection.
• Instantaneous (I) short-circuit protection.
• 100 kA Icu and Ics across 220–690 V AC.
• 100 kA short-time withstand current for 1 s.
• 85 kA short-time withstand current for 3 s.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 690 V AC rated operational voltage.
• Rear flat horizontal main terminals.
• Four auxiliary contacts with open/closed position indication.

High-Current Protection for Critical Power Distribution

Air circuit breakers such as the ABB SACE Emax E6H are designed to control and protect high-current low-voltage distribution networks. The electronic trip release monitors current conditions and initiates circuit interruption when configured protection thresholds are exceeded, helping protect cables, busbars, switchgear and connected equipment from potentially damaging electrical faults.

The PR121/P-LI release combines long-time overload protection with instantaneous short-circuit protection. Together with the E6H circuit breaker's 5000 A current rating, 100 kA breaking capacity through 690 V AC and robust fixed construction, this makes the 1SDA056976R1 particularly suitable for high-capacity main distribution and industrial installations requiring dependable fault interruption.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• High-current industrial power distribution systems.
• Manufacturing and process plants.
• Large commercial and infrastructure electrical installations.
• Transformer secondary circuit protection.
• Main incomer protection.
• High-current feeder protection.
• Generator and installation protection systems.
• Electrical installations with high prospective short-circuit currents.