1SDA056991R1 ABB E6H 5000 PR123/P-LSIG 5000 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA056991R1 E6H 5000 Air Circuit Breaker?

The ABB 1SDA056991R1 is a high-capacity SACE Emax E6H 5000 air circuit breaker (ACB) designed for protection and switching in demanding high-current low-voltage electrical distribution systems. Part of the ABB New Emax / SACE Emax range, this four-pole fixed circuit breaker combines a 5000 A rated current with the advanced PR123/P-LSIG electronic overcurrent release.

The PR123/P-LSIG electronic trip unit provides comprehensive LSIG protection, combining long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection. These protection functions help safeguard busbars, conductors, switchgear and connected equipment against sustained overcurrents, severe short circuits and ground-fault conditions in critical power-distribution applications.

With a 5000 A rated current, four-pole fixed construction and rear horizontal terminals, the 1SDA056991R1 is engineered for permanent integration into high-capacity switchboards. Its E6H frame and advanced PR123/P release make it particularly suitable for main distribution systems where dependable high-current protection, ground-fault protection and coordinated fault management are required.

Key Advantages

• High-capacity 5000 A air circuit breaker for demanding low-voltage power distribution.
• Four-pole fixed configuration for high-current switchboard installations.
• Advanced PR123/P-LSIG R5000 electronic overcurrent release.
• LSIG functionality provides long-time, short-time, instantaneous and ground-fault protection.
• E6H high-breaking-capacity performance for installations with substantial prospective fault currents.
• Rear horizontal terminals support integration with suitable high-current busbar arrangements.
• Four auxiliary contacts provide circuit-breaker open/closed status signalling.
• Four-pole construction is suitable for compatible distribution systems requiring neutral switching.

Key Features

• ABB SACE Emax E6H 5000 series.
• 5000 A rated current.
• Four-pole circuit-breaker configuration.
• Fixed installation version.
• PR123/P-LSIG R5000 electronic overcurrent release.
• Long-time (L) overload protection.
• Short-time (S) short-circuit protection.
• Instantaneous (I) short-circuit protection.
• Ground-fault (G) protection.
• Rear horizontal main terminals.
• Four auxiliary contacts.
• Circuit-breaker open/closed position indication.
• Designed for high-current industrial, commercial and infrastructure distribution systems.

Advanced LSIG Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E6H provide switching and protection for high-current low-voltage distribution networks. The electronic trip release monitors electrical conditions and initiates circuit interruption when configured protection thresholds are exceeded, helping protect switchgear, cables, busbars and connected equipment against potentially damaging overload, short-circuit and ground-fault conditions.

The PR123/P-LSIG release combines long-time overload, short-time short-circuit, instantaneous short-circuit and ground-fault protection in one advanced electronic protection unit. Together with the E6H circuit breaker's 5000 A current rating and four-pole fixed construction, this makes the 1SDA056991R1 particularly suitable for critical main distribution and industrial installations requiring comprehensive high-current circuit protection.

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.
• Four-pole distribution systems requiring neutral switching.
• Electrical installations requiring integrated ground-fault protection.
• Systems with high prospective short-circuit currents.