1SDA073431R1 ABB E1.2B/MS 630 4p F F Switch Disconnector

Why Choose the ABB E1.2B/MS 630 4p F F Switch Disconnector?

The ABB E1.2B/MS 630 4p F F, order code 1SDA073431R1, is a fixed SACE Emax 2 switch disconnector designed for dependable switching and isolation in low-voltage power-distribution systems. Based on ABB's compact E1.2 frame, this four-pole unit combines a 630 A rated uninterrupted current, B short-circuit performance level and front main-circuit terminals for straightforward integration into switchboards.

The E1.2B/MS is a switch-disconnector rather than an Emax 2 air circuit breaker equipped with an Ekip electronic protection trip unit. Its primary purpose is circuit switching and isolation within a suitably protected electrical system, allowing three-phase and neutral conductors to be disconnected while associated protective devices provide the required overcurrent and short-circuit protection.

Designed for operation at up to 690 V AC, the E1.2B/MS 630 provides a rated short-time withstand current of 42 kA for 1 s and 24 kA for 3 s. Its fixed construction, four-pole arrangement and front bolted terminals provide a compact, maintainable solution for industrial, commercial and infrastructure distribution assemblies.

Key Advantages

• 630 A Emax 2 switch disconnector for dependable low-voltage switching and isolation.
• Four-pole configuration enables simultaneous switching of three phases and neutral.
• 42 kA short-time withstand current for 1 s supports demanding distribution applications.
• 24 kA short-time withstand current for 3 s provides additional short-duration withstand capability.
• Fixed installation with front terminals provides a straightforward switchboard connection arrangement.
• Rated for operation at up to 690 V AC.
• Compact E1.2 frame helps optimise valuable switchboard space.

Key Features

• ABB SACE Emax 2 E1.2B/MS series.
• 630 A rated uninterrupted current.
• 4-pole configuration.
• Switch-disconnector function.
• B short-circuit performance level.
• Fixed mounting version.
• Front main-circuit terminals.
• Bolted main-circuit connection.
• Rated operational voltage: 690 V AC.
• Rated insulation voltage: 1000 V AC.
• Rated impulse withstand voltage: 12 kV.
• 42 kA rated short-time withstand current for 1 s.
• 24 kA rated short-time withstand current for 3 s.
• IP30 frontal degree of protection.
• Optional motor drive and voltage release.

Reliable Four-Pole Switching and Isolation

Switch disconnectors provide a defined means of switching and isolating electrical circuits while operating alongside dedicated protective devices within the distribution system. The ABB E1.2B/MS 630 combines a 630 A continuous-current rating with four-pole construction, enabling the phase conductors and neutral to be switched as part of the same device where the electrical system requires neutral isolation.

Its 42 kA short-time withstand current for 1 s enables the switch disconnector to withstand substantial fault current for the specified duration while the associated protective system operates. Combined with fixed mounting, front bolted terminals and the compact E1.2 frame, the 1SDA073431R1 provides a practical isolation solution for industrial, commercial and infrastructure low-voltage distribution assemblies.

Typical Applications

• Main and sectional isolation in low-voltage switchboards.
• Industrial power-distribution systems.
• Transformer secondary distribution assemblies.
• Four-wire three-phase systems requiring neutral switching.
• Manufacturing and process-industry switchboards.
• Commercial building electrical distribution.
• Infrastructure and utility distribution panels.
• Feeders requiring fixed 630 A four-pole switching and isolation.