1SDA056544R1 ABB E3V800 PR121/P-LI 800 A 3-Pole Withdrawable Air Circuit Breaker

Why Choose the ABB 1SDA056544R1 E3V 800 A Air Circuit Breaker?

The ABB 1SDA056544R1 is a high-performance SACE Emax E3V air circuit breaker (ACB) moving part designed for switching and protection in demanding low-voltage electrical distribution systems. Identified as E3V800 PR121/P-LI In=800A 3P W MP, this three-pole withdrawable circuit breaker moving part combines an 800 A rated uninterrupted current with the ABB PR121/P-LI electronic overcurrent release.

As part of the ABB SACE Emax / New Emax range, the E3V800 is engineered for industrial, commercial and infrastructure power distribution applications requiring high fault-current interruption capability. The PR121/P-LI electronic trip unit provides long-time overload and instantaneous short-circuit protection, helping safeguard cables, busbars and connected electrical equipment against damaging overcurrent conditions.

This version features a three-pole withdrawable moving-part construction for use with the appropriate ABB SACE Emax fixed part. With an 800 A rated uninterrupted current, a rated operational voltage of 690 V AC and an ultimate short-circuit breaking capacity of 130 kA at 400–415 V AC, the E3V800 is suited to distribution systems requiring high breaking performance together with convenient isolation and removal for servicing.

Key Advantages

• High-performance 800 A air circuit breaker moving part for low-voltage power distribution.
• PR121/P-LI electronic protection release for overload and instantaneous short-circuit protection.
• Three-pole withdrawable configuration supports convenient switchboard maintenance and servicing.
• 130 kA ultimate short-circuit breaking capacity at 400–415 V AC.
• 100 kA service short-circuit breaking capacity at 400–415 V AC.
• 85 kA rated short-time withstand current for 1 s.
• Rated for operation at up to 690 V AC.
• Fitted with four auxiliary contacts and open/closed circuit breaker position indication.

Key Features

• ABB SACE Emax E3V frame.
• 800 A rated uninterrupted current.
• PR121/P-LI electronic trip unit.
• Long-time and instantaneous (LI) protection.
• Three-pole configuration.
• Withdrawable moving-part design.
• 690 V AC rated operational voltage.
• 1000 V rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 130 kA ultimate short-circuit breaking capacity at 400–415 V AC.
• 100 kA service short-circuit breaking capacity at 400–415 V AC.
• Four auxiliary contacts with open/closed position indication.

Reliable Circuit Protection for Power Distribution

Air circuit breakers such as the ABB E3V800 provide switching and automatic protection for low-voltage electrical distribution systems. The PR121/P electronic release monitors circuit current and provides dedicated protection functions to help safeguard cables, busbars and downstream electrical equipment against overload and high-level short-circuit conditions.

The LI configuration combines long-time overload protection with instantaneous short-circuit protection. Together with the high breaking performance of the E3V frame and its withdrawable construction, this makes the 1SDA056544R1 suitable for distribution systems where dependable overcurrent protection, high fault-current interruption capability and convenient circuit breaker servicing are required.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Main incomer and feeder protection.
• Manufacturing and process plants.
• Commercial and infrastructure electrical systems.
• Transformer secondary distribution circuits.
• High-fault-level electrical installations.
• Switchboards requiring withdrawable air circuit breakers.