1SDA057009R1 ABB E6H6300 PR121/P-LSI 6300A 3-Pole Air Circuit Breaker

Why Choose the ABB E6H6300 PR121/P-LSI 6300A 3-Pole Air Circuit Breaker?

The ABB 1SDA057009R1 is a high-performance SACE Emax E6H air circuit breaker (ACB) designed for protection and switching of very high-current low-voltage electrical distribution systems. As part of the ABB New Emax series, the E6H6300 combines a substantial 6300 A current rating with the electronic PR121/P-LSI protection release for dependable overload and short-circuit protection in demanding industrial, commercial and infrastructure installations.

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, supporting effective protection coordination in high-capacity electrical distribution networks.

With a rated uninterrupted current of 6300 A, rated operational voltage up to 690 V AC and an ultimate short-circuit breaking capacity of 100 kA across the specified 220–690 V AC range, the E6H6300 is engineered for major power distribution applications where high current capacity, robust fault protection and dependable switching performance are essential.

Key Advantages

• Very high-capacity 6300 A air circuit breaker for low-voltage power distribution.
• Three-pole configuration for three-phase electrical systems.
• Advanced PR121/P-LSI electronic protection release.
• LSI protection provides overload, selective short-circuit and instantaneous short-circuit protection.
• 100 kA ultimate and service short-circuit breaking capacity across the specified 220–690 V AC range.
• Rated operational voltage up to 690 V AC.
• Fixed installation with rear horizontal terminals.
• High short-time withstand capability for demanding power distribution networks.

Key Features

• ABB SACE Emax E6H series.
• 6300 A rated uninterrupted current.
• 3-pole fixed air circuit breaker.
• PR121/P-LSI electronic trip unit.
• Long-time overload (L) protection.
• Selective short-circuit (S) protection.
• Instantaneous short-circuit (I) protection.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 100 kA Icu and Ics short-circuit breaking capacity.
• 100 kA short-time withstand current for 1 s.
• H short-circuit performance level.
• Rear horizontal terminal arrangement.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E6H6300 provide switching, isolation and protection for very high-current low-voltage distribution circuits. The electronic trip unit monitors electrical conditions and initiates circuit interruption when configured protection thresholds are exceeded, helping protect busbars, cables, transformers and connected equipment against damaging overload and short-circuit currents.

The PR121/P-LSI release combines long-time, selective short-circuit and instantaneous protection functions, allowing the breaker to support coordinated protection strategies in complex electrical networks. Combined with the E6H6300's 6300 A current capability, 100 kA breaking capacity and high short-time withstand performance, the 1SDA057009R1 is particularly suited to major industrial and infrastructure power distribution systems.

Typical Applications

• Low-voltage main distribution switchboards.
• Very high-current industrial electrical distribution systems.
• Main incoming and high-capacity 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.