1SDA057018R1 ABB E6H6300PR121/P-LSIG 6300 A 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB E6H6300PR121/P-LSIG 6300 A Air Circuit Breaker?

The ABB E6H6300PR121/P-LSIG, order code 1SDA057018R1, is a high-capacity SACE Emax E6 H 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 the robust E6 H platform with ABB's PR121/P-LSIG 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 high current capacity and dependable fault interruption are essential. The PR121/P-LSIG trip unit provides comprehensive LSIG protection covering long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault conditions.

This configuration is a four-pole fixed circuit breaker with rear horizontal terminals and a rated current of 6300 A. It is equipped with the PR121/P-LSIG R6300 overcurrent release, four auxiliary contacts and open/closed breaker position indication, providing a powerful solution for major low-voltage distribution installations.

Key Advantages

• High-capacity 6300 A SACE Emax air circuit breaker for major power distribution systems.
• E6 H high-performance breaker platform for demanding industrial low-voltage installations.
• PR121/P-LSIG electronic overcurrent release for comprehensive circuit protection.
• LSIG protection functions cover overload, short-time and instantaneous short-circuit faults plus earth faults.
• Four-pole fixed configuration for high-current switchboard installations.
• Rear horizontal terminals provide a practical connection arrangement for switchgear and busbar systems.
• 100 kA breaking capacity across a wide range of operational voltages up to 690 V AC.
• Fitted with four auxiliary contacts and open/closed breaker position indication.

Key Features

• ABB SACE Emax E6 H series.
• 6300 A rated current.
• Four-pole configuration.
• Fixed execution.
• Rear horizontal terminals.
• PR121/P-LSIG R6300 electronic overcurrent release.
• Long-time overload protection (L).
• Short-time short-circuit protection (S).
• Instantaneous short-circuit protection (I).
• Earth-fault protection (G).
• 100 kA rated ultimate short-circuit breaking capacity at up to 690 V AC.
• 100 kA rated short-time withstand current for 1 s.

Advanced Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E6 are designed to protect high-current low-voltage distribution systems against overloads, short circuits and earth faults. The E6 frame provides the substantial current-carrying capacity required for major incoming feeders, main distribution boards and critical electrical infrastructure where reliable interruption of high fault currents is essential.

The PR121/P-LSIG electronic release provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. Combined with the E6 H breaker's high breaking capability, these protection functions help safeguard conductors, busbars and connected equipment while supporting coordinated protection throughout complex electrical distribution systems.

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 and high-current distribution applications.
• Commercial and infrastructure electrical installations.
• Critical power and large-scale electrical distribution networks.