1SDA055592R1 ABB E6H/f 6300 PR121/P-LI 6300A 4-Pole Withdrawable Air Circuit Breaker Moving Part

Why Choose the ABB E6H/f 6300 PR121/P-LI 6300A 4-Pole Withdrawable Circuit Breaker?

The ABB E6H/f 6300 PR121/P-LI, order code 1SDA055592R1, is the moving part of a high-capacity SACE Emax withdrawable air circuit breaker designed for protection and switching in demanding low-voltage power distribution systems. Rated at 6300 A, this four-pole unit combines the high-performance E6H frame with a PR121/P-LI electronic overcurrent release for dependable overload and short-circuit protection.

As part of the ABB SACE Emax range, the E6H/f 6300 is engineered for industrial, infrastructure and large commercial installations where high current capacity, serviceability and reliable protection are essential. The PR121/P-LI trip unit provides long-time and instantaneous protection functions, helping safeguard conductors, switchgear and connected equipment against overloads and severe short-circuit faults.

This version is a four-pole withdrawable moving part with a full-size neutral, identified by the W MP configuration. The withdrawable arrangement enables the breaker moving part to be isolated and removed from its fixed section for inspection, maintenance or replacement, supporting efficient servicing of critical high-current switchboards.

Key Advantages

• High-capacity 6300 A SACE Emax air circuit breaker moving part.
• Four-pole configuration with full-size neutral for three-phase and neutral networks.
• Electronic PR121/P-LI overcurrent release for dependable circuit protection.
• LI protection functions provide long-time and instantaneous protection.
• 100 kA ultimate short-circuit breaking capacity at 415 V AC.
• 100 kA service short-circuit breaking capacity at 415 V AC.
• Withdrawable moving-part design supports maintenance and replacement without permanently wired breaker removal.
• Four auxiliary contacts and open/closed position indication support status monitoring and control.

Key Features

• ABB SACE Emax E6H/f 6300 air circuit breaker moving part.
• 6300 A rated uninterrupted current.
• Four-pole construction.
• Full-size neutral configuration.
• PR121/P-LI electronic overcurrent release, R6300.
• Long-time and instantaneous protection functions.
• 690 V AC rated operational voltage.
• 100 kA short-time withstand current for 1 s.
• Withdrawable execution for serviceable switchboard installations.
• Supplied as the moving part of the withdrawable circuit breaker.
• Fitted with four auxiliary contacts.
• Circuit-breaker open/closed position indication.

Reliable Withdrawable Protection for High-Current Distribution

Air circuit breakers such as the ABB E6H/f 6300 provide switching and overcurrent protection for high-current low-voltage distribution networks. The PR121/P-LI electronic release monitors current and initiates circuit-breaker operation when configured protection thresholds are exceeded, helping protect electrical infrastructure against sustained overloads and severe short-circuit faults.

The withdrawable moving-part configuration is particularly useful in critical switchboards where maintenance accessibility and reduced service interruption are important. Combined with the 6300 A E6H/f frame, full-size neutral and LI electronic protection, this design is well suited to main distribution positions in large industrial and infrastructure power systems.

Typical Applications

• Main incomers for high-current low-voltage switchboards.
• Withdrawable power distribution assemblies.
• Industrial manufacturing and process facilities.
• Large commercial and infrastructure electrical systems.
• Power generation and utility distribution installations.
• Transformer secondary and main distribution protection.
• Critical power systems requiring serviceable circuit-breaker arrangements.