1SDA057145R1 ABB E6V6300PR121/P-LSI 6300 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E6V6300PR121/P-LSI 6300 A Air Circuit Breaker?

The ABB E6V6300PR121/P-LSI, order code 1SDA057145R1, is a high-capacity SACE Emax E6 V air circuit breaker designed for protection, switching and isolation in demanding low-voltage power distribution systems. Rated at 6300 A, this four-pole fixed breaker combines ABB's E6 V high-performance platform with a PR121/P-LSI R6300 electronic overcurrent release.

As part of the ABB SACE Emax range, the breaker is engineered for industrial switchboards, power distribution centres and critical infrastructure where very high continuous current capacity and dependable fault protection are required. The PR121/P-LSI trip unit provides long-time overload, short-time short-circuit and instantaneous short-circuit protection.

This configuration is a four-pole fixed circuit breaker with rear horizontal terminals and a rated current of 6300 A. It is fitted with four auxiliary contacts and open/closed position indication, providing a robust solution for main incoming, transformer secondary and major feeder protection duties.

Key Advantages

• Very high 6300 A rated current for major low-voltage power distribution systems.
• E6 V high-performance platform for demanding high-current and high-fault-level applications.
• PR121/P-LSI R6300 electronic overcurrent release for coordinated circuit protection.
• LSI protection functions provide long-time overload, short-time short-circuit and instantaneous short-circuit protection.
• Four-pole fixed configuration for high-current switchboard installations.
• Rear horizontal terminals support practical integration with switchboard busbar systems.
• Fitted with four auxiliary contacts and open/closed breaker position indication.
• Suitable for main incoming, transformer secondary and major feeder protection duties.

Key Features

• ABB SACE Emax E6 V series.
• 6300 A rated current.
• Four-pole configuration.
• Fixed execution.
• Rear horizontal terminals.
• PR121/P-LSI R6300 electronic overcurrent release.
• Long-time overload protection (L).
• Short-time short-circuit protection (S).
• Instantaneous short-circuit protection (I).
• V performance level for demanding power distribution duties.
• Four auxiliary contacts for breaker status signalling.
• Open/closed breaker position indication.

Advanced LSI Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E6 protect high-current low-voltage distribution systems against overloads and short-circuit faults while providing reliable switching and isolation of major electrical circuits. With its 6300 A rating and E6 V performance level, this breaker is suited to substantial main distribution systems where very high continuous currents and demanding fault conditions must be managed.

The PR121/P-LSI electronic release combines long-time overload, short-time short-circuit and instantaneous short-circuit protection. The addition of short-time protection enables improved selectivity and coordination with downstream protective devices, helping protect busbars, conductors, transformers and connected equipment across complex industrial and infrastructure distribution networks.

Typical Applications

• Main incoming protection for high-current low-voltage switchboards.
• Large industrial power distribution systems.
• Manufacturing and process plant electrical infrastructure.
• Power distribution centres and main switchboards.
• Transformer secondary protection.
• High-current feeder and busbar protection.
• Critical infrastructure and large-scale electrical distribution networks.