1SDA057024R1 ABB E6H6300 PR121/P-LI 6300A 3-Pole Withdrawable Air Circuit Breaker Moving Part

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

The ABB 1SDA057024R1 is a high-performance SACE Emax E6H air circuit breaker moving part designed for protection and switching of very high-current low-voltage electrical distribution systems. As part of the advanced ABB New Emax series, the E6H6300 combines a substantial 6300 A current rating with the PR121/P-LI electronic overcurrent release for dependable protection in demanding industrial and infrastructure power distribution applications.

This three-pole withdrawable circuit breaker moving part is equipped with the PR121/P-LI electronic trip unit, providing long-time overload (L) and instantaneous short-circuit (I) protection. Its withdrawable configuration allows the moving part to be disconnected and removed from the corresponding fixed part, supporting inspection, maintenance and replacement in critical switchgear installations.

With a rated uninterrupted current of 6300 A, rated operational voltage of 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 high-capacity electrical distribution systems requiring robust fault protection and dependable switching performance.

Key Advantages

• Very high-capacity 6300 A air circuit breaker moving part for low-voltage power distribution.
• Three-pole configuration for three-phase electrical systems.
• Electronic PR121/P-LI overcurrent protection release.
• LI protection provides long-time overload and instantaneous short-circuit protection.
• 100 kA ultimate and service short-circuit breaking capacity across the specified 220–690 V AC range.
• Withdrawable moving-part design supports maintenance and servicing of critical switchgear.
• Four auxiliary contacts with open / closed circuit-breaker position indication.
• High short-time withstand capability for demanding electrical distribution systems.

Key Features

• ABB SACE Emax E6H series.
• 6300 A rated uninterrupted current.
• 3-pole withdrawable moving part.
• PR121/P-LI electronic trip unit.
• Long-time overload (L) 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.
• Four auxiliary contacts with open / closed position indication.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E6H6300 provide switching 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-LI release combines long-time overload and instantaneous short-circuit protection for straightforward, dependable protection of high-capacity distribution circuits. Combined with the E6H6300's 6300 A current capability, 100 kA breaking capacity and withdrawable moving-part construction, the 1SDA057024R1 is particularly suitable for critical installations where high fault performance and maintainability are required.

Typical Applications

• Low-voltage main distribution switchboards.
• Withdrawable industrial switchgear assemblies.
• Very 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 distribution installations requiring serviceable switchgear.