1SDA073393R1 ABB E1.2N/MS 630 3p F F Switch Disconnector

Why Choose the ABB E1.2N/MS 630 3p F F Switch Disconnector?

The ABB E1.2N/MS 630 3p F F, order code 1SDA073393R1, is a fixed SACE Emax 2 switch disconnector designed for dependable isolation and switching in low-voltage power-distribution systems. Based on ABB's compact E1.2 frame, this three-pole unit combines a 630 A rated uninterrupted current, N performance level and fixed installation with front main-circuit terminals.

Unlike an Emax 2 circuit breaker fitted with an Ekip protection trip unit, the E1.2N/MS is a switch-disconnector intended primarily for switching and isolation. Its construction provides the high short-time current withstand required for use within coordinated low-voltage switchboards, with a rated short-time withstand current of 50 kA for 1 s and 30 kA for 3 s.

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 1SDA073393R1 is suited to robust industrial and infrastructure distribution assemblies. Its fixed, front-terminal configuration provides a compact installation arrangement, while the Emax 2 platform supports integration into coordinated switchboard architectures.

Key Advantages

• 630 A Emax 2 switch disconnector for low-voltage power-distribution applications.
• Three-pole configuration for three-phase switching and isolation.
• Fixed installation provides a straightforward permanent switchboard arrangement.
• Front main-circuit terminals simplify integration into suitable panel layouts.
• 50 kA short-time withstand current for 1 s supports demanding distribution applications.
• Rated for operation at up to 690 V AC.
• Compact E1.2 frame with a product width of only 210 mm.

Key Features

• ABB SACE Emax 2 E1.2N/MS series.
• 630 A rated uninterrupted current.
• 3-pole configuration.
• Switch-disconnector function.
• N short-circuit performance level.
• Fixed mounting version.
• Front terminal connection.
• Bolted main-circuit terminals.
• 690 V AC rated operational voltage.
• 1000 V AC rated insulation voltage.
• 12 kV rated impulse withstand voltage.
• 50 kA short-time withstand current for 1 s.
• 30 kA short-time withstand current for 3 s.
• High mechanical and electrical operating durability.

Reliable Switching and Isolation for Power Distribution

Switch disconnectors provide a defined means of switching and isolating circuits within low-voltage distribution systems. The ABB E1.2N/MS 630 combines a 630 A current rating with the robust construction of the SACE Emax 2 platform, making it suitable for switchboard positions where dependable switching and isolation are required without an integral electronic overcurrent trip unit.

Its 50 kA short-time withstand rating for 1 s enables the device to withstand substantial fault current for the specified duration while upstream or downstream protective equipment clears the fault. Combined with fixed mounting, front terminals and compact E1.2 dimensions, the 1SDA073393R1 provides a practical solution for industrial, commercial and infrastructure distribution assemblies.

Typical Applications

• Main and sectional isolation in low-voltage switchboards.
• Industrial power-distribution systems.
• Transformer secondary distribution assemblies.
• Manufacturing and process-industry switchboards.
• Commercial building electrical distribution.
• Infrastructure and utility distribution panels.
• Generator and auxiliary power-distribution systems.
• Three-phase feeders requiring fixed 630 A switching and isolation.