1SDA059071R1 ABB E3H/E MS 1250A 750V DC 3-Pole Withdrawable Switch Disconnector Moving Part

Why Choose the ABB 1SDA059071R1 E3H/E MS 1250 Switch Disconnector?

The ABB 1SDA059071R1 is a high-performance SACE Emax E3H/E MS switch disconnector moving part designed for dependable switching and isolation in demanding DC power distribution systems. Rated at 1250 A and 750 V DC, this three-pole withdrawable configuration provides robust high-current isolation for industrial switchboards and power distribution assemblies.

Part of the proven ABB SACE Emax family, the E3H/E MS 1250 combines the E3 frame with H performance level and a withdrawable construction. The W MP designation identifies this product as the moving part of the withdrawable switch-disconnector arrangement, allowing the device to be used with the appropriate E3 fixed part in a complete withdrawable installation.

With a rated uninterrupted current of 1250 A, a three-pole 750 V DC configuration and a rated short-time withstand current of 40 kA for 1 s, the 1SDA059071R1 is engineered for substantial DC distribution duties where reliable isolation and serviceable switchgear construction are required.

Key Advantages

• High-current 1250 A switch disconnector for industrial DC power systems.
• Designed for operation at 750 V DC.
• Three-pole configuration for the specified DC application.
• Withdrawable moving-part design supports serviceable switchgear installations.
• High 40 kA for 1 s short-time withstand current.
• Proven ABB SACE Emax E3 platform for demanding power distribution applications.

Key Features

• ABB SACE Emax E3H/E MS series.
• 1250 A rated uninterrupted current.
• 750 V DC application rating.
• 3-pole configuration.
• Withdrawable (W) moving part (MP).
• E3 frame construction.
• H performance level.
• 40 kA / 1 s rated short-time withstand current.
• Designed for use with the corresponding E3 withdrawable fixed part.
• Suitable for high-current industrial DC switching and isolation duties.

Reliable High-Current DC Isolation and Switching

Switch disconnectors provide controlled switching and electrical isolation of power circuits, enabling downstream equipment to be separated from its supply when required. DC networks place significant demands on switching devices because direct current does not naturally pass through a zero-current point during every electrical cycle, making equipment with an appropriate DC voltage rating essential.

The ABB SACE Emax E3H/E MS range is engineered for demanding DC distribution applications. This 1250 A, 750 V DC moving part combines withdrawable construction with a substantial 40 kA for 1 s short-time withstand rating, providing a practical solution for industrial switchgear where high-current capability and equipment serviceability are important.

Typical Applications

• High-current DC power distribution systems.
• Industrial withdrawable switchboards and switchgear.
• 750 V DC main-circuit isolation.
• Industrial power conversion and DC distribution equipment.
• Large machinery and electrical plant power systems.
• OEM power distribution and switchgear assemblies.