1SDA073433R1 ABB E1.2B/MS 800 4p F F Switch-Disconnector

Why Choose the ABB E1.2B/MS 800 4p F F Switch-Disconnector?

The ABB E1.2B/MS 800 4p F F, order code 1SDA073433R1, is a compact four-pole fixed air switch-disconnector from the ABB SACE Emax 2 range. Rated at 800 A, it is designed for dependable switching and isolation in low-voltage power distribution systems where a compact footprint, four-pole isolation and robust short-time withstand performance are required.

The E1.2B/MS is a switch-disconnector rather than an automatic circuit breaker equipped with an electronic protection release. It provides a rated short-time withstand current of 42 kA for 1 s, enabling it to withstand substantial prospective fault current while suitably coordinated upstream or downstream protective devices provide automatic overcurrent and short-circuit protection.

This version combines a fixed four-pole configuration with front terminals for straightforward integration into low-voltage switchboards. With a rated operational voltage of 690 V AC, rated insulation voltage of 1000 V AC and rated impulse withstand voltage of 12 kV, the E1.2B/MS 800 provides reliable switching and isolation for industrial, commercial and infrastructure power distribution applications.

Key Advantages

• Compact 800 A four-pole switch-disconnector for low-voltage power distribution systems.
• 42 kA short-time withstand current for 1 s supports coordinated high-current installations.
• Four-pole construction enables simultaneous switching and isolation of all four conductors.
• Rated for operation at up to 690 V AC.
• 1000 V AC insulation voltage and 12 kV impulse withstand voltage.
• Provides dependable switching and isolation without an integrated electronic overcurrent trip unit.
• Fixed installation offers a straightforward and robust switchboard configuration.
• Front terminals provide an accessible main-circuit connection arrangement.
• Compact E1.2 frame helps optimise switchboard space.
• Part of the proven ABB SACE Emax 2 low-voltage switching platform.

Key Features

• ABB SACE Emax 2 E1.2B/MS switch-disconnector.
• 800 A rated uninterrupted current.
• Four-pole (4P) configuration.
• Fixed (F) installation.
• Front (F) main terminals.
• 690 V AC rated operational voltage.
• 1000 V AC rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 42 kA rated short-time withstand current for 1 s.
• B short-circuit performance level.
• Switch-disconnector construction for switching and isolation duties.
• No integrated electronic overcurrent protection release.
• Bolt-type main-circuit terminals.
• M10 recommended main-circuit connection hardware.
• Designed in accordance with applicable IEC requirements.

Compact Four-Pole Switching and Isolation

The ABB Emax 2 E1.2B/MS is designed for installations requiring reliable high-current switching and circuit isolation without integrated automatic overcurrent protection. Its combination of an 800 A continuous current rating, 690 V AC operational capability and 42 kA short-time withstand current for 1 s makes it suitable for coordinated distribution systems where separate protective devices provide automatic fault protection.

The fixed four-pole construction is particularly useful where the neutral conductor must be switched together with the phase conductors. Combined with front main terminals and the compact E1.2 frame, the 1SDA073433R1 provides a practical isolation solution for switchboards where accessibility, space efficiency and dependable four-pole switching are important design considerations.

Typical Applications

• Main and secondary isolation in low-voltage switchboards.
• Four-pole electrical distribution systems.
• Industrial power distribution installations.
• Commercial building electrical distribution.
• Bus-section and bus-coupler switching applications.
• Manufacturing plants and process facilities.
• Data centres and critical power infrastructure.
• Utility and infrastructure distribution systems.
• Switchboards using separate upstream or downstream overcurrent protection.
• Applications requiring fixed front-connected switching and isolation.