1SDA056977R1 ABB E6H5000 PR121/P-LSI 5000A 3-Pole Air Circuit Breaker

Why Choose the ABB E6H5000 PR121/P-LSI 5000A 3-Pole Air Circuit Breaker?

The ABB 1SDA056977R1 is a high-performance SACE Emax New E6 air circuit breaker (ACB) designed for protection and switching of high-current low-voltage electrical distribution systems. As part of the ABB SACE Emax New series, the E6H5000 combines a substantial 5000 A current rating with the electronic PR121/P-LSI protection release for dependable overload, selective short-circuit and instantaneous short-circuit protection.

This three-pole fixed circuit breaker features rear horizontal terminals and ABB's H short-circuit performance level. The PR121/P-LSI electronic trip unit provides long-time overload (L), selective short-circuit (S) and instantaneous short-circuit (I) protection, making the breaker suitable for demanding industrial distribution systems where selectivity and reliable fault protection are important.

With a rated uninterrupted current of 5000 A, rated operational voltage up to 690 V AC and an ultimate short-circuit breaking capacity of 100 kA across its specified AC voltage range, the E6H5000 is engineered for high-capacity power distribution applications requiring robust switching performance and dependable electrical protection.

Key Advantages

• High-capacity 5000 A air circuit breaker for low-voltage power distribution.
• Three-pole configuration for three-phase electrical systems.
• Advanced PR121/P-LSI electronic protection release.
• 100 kA ultimate short-circuit breaking capacity for demanding fault conditions.
• Rated operational voltage up to 690 V AC.
• Fixed installation with rear horizontal terminals.
• LSI protection provides overload, selective short-circuit and instantaneous short-circuit protection.
• Four auxiliary changeover contacts for open and closed circuit-breaker status indication.

Key Features

• ABB SACE Emax New E6 series.
• 5000 A rated uninterrupted current.
• 3-pole fixed air circuit breaker.
• PR121/P-LSI electronic trip unit.
• Long-time overload, selective short-circuit and instantaneous short-circuit protection.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 100 kA rated service and ultimate short-circuit breaking capacity.
• H short-circuit performance level.
• Rear flat horizontal terminal arrangement.
• Four auxiliary changeover contacts for breaker position signalling.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E6H5000 provide switching, isolation and protection for high-current low-voltage distribution circuits. The circuit breaker interrupts current when its electronic protection release detects operating conditions outside the configured protection thresholds, helping protect busbars, cables, transformers and connected electrical equipment against damaging overload and short-circuit currents.

The PR121/P-LSI electronic release adds selective short-circuit protection alongside overload and instantaneous protection, helping engineers coordinate protection between upstream and downstream devices. Combined with the E6H breaker's 5000 A current capability, 100 kA short-circuit performance and fixed installation format, this makes the 1SDA056977R1 well suited to major industrial and infrastructure distribution systems.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial electrical distribution systems.
• High-current incoming and feeder circuits.
• Manufacturing and process plants.
• Commercial and infrastructure power distribution.
• Transformer secondary protection and switching.
• Generator and utility distribution systems.
• High-capacity electrical switchgear assemblies.