1SDA056528R1 ABB E3V800 PR121/P-LI 800 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA056528R1 E3V 800 A Air Circuit Breaker?

The ABB 1SDA056528R1 is a high-performance SACE Emax E3V air circuit breaker (ACB) designed for switching and protection in demanding low-voltage electrical distribution systems. Identified as E3V800 PR121/P-LI In=800A 3P F HR, this three-pole fixed circuit breaker combines an 800 A rated 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 fixed construction with rear horizontal terminals for permanent installation within low-voltage switchboards. 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 provides robust protection for distribution systems with high prospective fault currents.

Key Advantages

• High-performance 800 A air circuit breaker for low-voltage power distribution.
• PR121/P-LI electronic protection release for overload and instantaneous short-circuit protection.
• Three-pole fixed configuration for permanent switchboard installation.
• Rear horizontal terminals support practical connection to switchboard conductors and busbars.
• 130 kA ultimate 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.
• Part of the proven ABB SACE Emax circuit breaker range.

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.
• Fixed mounting construction.
• Rear flat horizontal terminals.
• 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 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, this makes the 1SDA056528R1 suitable for distribution circuits where dependable overcurrent protection and high fault-current interruption capability 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.
• Fixed switchboard installations requiring electronic LI protection.