1SDA073491R1 ABB E2.2H/MS 1250 3p WMP Switch Disconnector

Why Choose the ABB E2.2H/MS 1250 3p WMP Switch Disconnector?

The ABB E2.2H/MS 1250 3p WMP, order code 1SDA073491R1, is a high-performance three-pole withdrawable air switch disconnector from the ABB SACE Emax 2 family, designed for dependable switching and electrical isolation in demanding low-voltage power distribution systems. Based on the Emax 2 E2.2 platform, this H-performance model combines a 1250 A current rating with high short-time withstand capability for industrial, commercial and infrastructure switchboards.

The E2.2H/MS is designed as a switch disconnector in accordance with IEC 60947-3. Unlike an automatic air circuit breaker, the /MS version does not incorporate a protection trip unit and is intended primarily for switching and isolation. This product is the withdrawable moving part, allowing it to be disconnected from its compatible fixed part for inspection, servicing and maintenance.

With a rated uninterrupted current of 1250 A, a three-pole configuration and a rated short-time withstand current of 85 kA for 1 s, the E2.2H/MS is suited to demanding power distribution installations. Its 690 V AC rated operational voltage, 1000 V AC insulation voltage and AC-23A utilisation category provide a robust specification for high-current switching and isolation.

Key Advantages

• High-performance 1250 A air switch disconnector for low-voltage distribution.
• Three-pole configuration for three-phase switching and isolation.
• 85 kA short-time withstand current for 1 s for demanding fault-level conditions.
• 66 kA short-time withstand current for 3 s.
• Withdrawable moving-part design supports efficient servicing and maintenance.
• Built on the proven ABB SACE Emax 2 E2.2 platform.

Key Features

• ABB SACE Emax 2 E2.2H/MS series.
• 1250 A rated uninterrupted current.
• 3-pole configuration.
• 690 V AC rated operational voltage.
• 1000 V AC rated insulation voltage.
• 85 kA Icw for 1 s.
• 66 kA Icw for 3 s.
• AC-23A utilisation category.
• Withdrawable moving-part construction.
• Switch-disconnector design without an automatic protection trip unit.

Reliable Switching and Isolation for Power Distribution

ABB Emax 2 /MS switch disconnectors provide reliable switching and electrical isolation of low-voltage power circuits. When the device is open, the separation of the main contacts provides the isolation required for downstream equipment, while the absence of an automatic protection trip unit distinguishes the /MS configuration from an Emax 2 air circuit breaker.

The withdrawable E2.2H/MS architecture allows the moving part to be separated from its compatible fixed part, supporting maintenance and servicing without the limitations of a permanently fixed device. Combined with its 1250 A current rating and 85 kA one-second withstand capability, the 1SDA073491R1 is well suited to demanding low-voltage distribution assemblies.

Typical Applications

• Main low-voltage distribution switchboards.
• Industrial power distribution systems.
• Commercial and infrastructure electrical installations.
• Three-phase circuit isolation and sectionalising.
• Withdrawable switchgear requiring service flexibility.
• OEM switchgear and panel-building applications.