1SDA057017R1 ABB E6H6300 PR121/P-LSI 6300A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E6H6300 PR121/P-LSI 6300A 4-Pole Fixed Air Circuit Breaker?

The ABB 1SDA057017R1, product designation E6H6300PR121/P-LSIIn=6300A4pF, is a high-current SACE Emax air circuit breaker (ACB) designed for protection and switching in demanding low-voltage electrical distribution systems. Part of the ABB SACE Emax E6H series, this four-pole fixed circuit breaker combines a 6300 A rated current with the PR121/P-LSI electronic overcurrent release.

The E6H6300 is engineered for major industrial, commercial and infrastructure power distribution applications where dependable overload and short-circuit protection is essential. Its PR121/P-LSI electronic trip unit provides long-time, short-time and instantaneous protection functions, helping protect busbars, cables, switchgear and connected equipment while supporting selective coordination within complex electrical distribution networks.

The high-current E6H platform provides substantial short-circuit performance for critical low-voltage installations. This version uses a four-pole fixed configuration, making it suitable for permanent installation within high-capacity switchboards where switching and protection across four poles are required.

Key Advantages

• High-current ABB SACE Emax E6H air circuit breaker for demanding low-voltage distribution systems.
• 6300 A rated current for major industrial and infrastructure installations.
• PR121/P-LSI electronic overcurrent release with long-time, short-time and instantaneous protection.
• Short-time protection supports selective coordination between upstream and downstream protective devices.
• Four-pole fixed configuration for permanent integration into high-capacity switchboards.
• High short-circuit performance for installations with substantial prospective fault currents.
• ABB SACE Emax construction designed for high-current switching and circuit protection.

Key Features

• ABB SACE Emax E6H series.
• 6300 A rated current.
• Four-pole configuration.
• Fixed circuit breaker.
• PR121/P-LSI electronic trip unit.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• LSI protection for coordinated high-current distribution systems.
• H-performance SACE Emax breaker platform.
• Designed for demanding industrial and infrastructure switchgear applications.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E6H6300 provide switching and protection for high-capacity low-voltage distribution networks. With a rated current of 6300 A, the E6H platform is particularly suited to main incoming supplies, large switchboards, transformer secondary systems and industrial distribution networks where substantial electrical loads and high prospective fault currents must be safely managed.

The PR121/P-LSI electronic release provides three complementary protection functions. Long-time protection responds to sustained overload conditions, short-time protection enables controlled fault clearing and selective coordination, and instantaneous protection provides rapid interruption during severe short-circuit faults. Combined with its four-pole fixed construction, the E6H6300 provides a robust solution for high-current distribution systems requiring coordinated electronic circuit protection.

Typical Applications

• Main low-voltage electrical distribution switchboards.
• High-current industrial power distribution systems.
• Large switchgear and busbar assemblies.
• Transformer secondary protection and distribution.
• Manufacturing and heavy process plants.
• Data centre and critical infrastructure power distribution.
• Commercial and infrastructure electrical installations.
• High-capacity four-pole distribution systems requiring selective LSI protection.