1SDA073543R1 ABB E4.2V/MS 3200 4p WMP Switch Disconnector

Why Choose the ABB E4.2V/MS 3200 4p WMP Switch Disconnector?

The ABB E4.2V/MS 3200 4p WMP, order code 1SDA073543R1, is a high-performance four-pole withdrawable air switch disconnector from the ABB SACE Emax 2 range. Designed for demanding low-voltage power distribution systems, this E4.2 V-performance device provides a substantial 3200 A rated uninterrupted current for industrial, commercial and infrastructure switchboards.

The E4.2V/MS combines its high continuous-current capacity with a rated short-time withstand current of 100 kA. This robust withstand capability makes it suitable for installations with high prospective fault currents, while appropriately coordinated protective equipment elsewhere in the electrical system provides the required automatic overload and short-circuit protection.

This model is supplied as the withdrawable moving part (WMP) in a four-pole configuration. With a rated operational voltage of 690 V AC and AC-21 and AC-23 continuous-current ratings of 3200 A at 400 V, the 1SDA073543R1 provides dependable high-current switching and isolation together with the serviceability of a withdrawable Emax 2 installation.

Key Advantages

• 3200 A rated uninterrupted current for high-capacity low-voltage distribution systems.
• 100 kA rated short-time withstand current for demanding high-fault-level installations.
• Four-pole construction for comprehensive switching and electrical isolation.
• Withdrawable moving-part design supports inspection, servicing and equipment replacement.
• 690 V AC rated operational voltage for industrial low-voltage networks.
• 3200 A AC-21 and AC-23 ratings at 400 V for demanding switching duties.
• IP30 front-side protection when installed in the intended assembly.
• Part of the proven ABB SACE Emax 2 platform for high-performance power distribution.

Key Features

• ABB SACE Emax 2 E4.2V/MS air switch disconnector.
• 3200 A rated uninterrupted current (Iu).
• Four-pole configuration.
• 100 kA rated short-time withstand current (Icw).
• 690 V AC rated operational voltage (Ue).
• 3200 A rated continuous current at AC-21, 400 V.
• 3200 A rated continuous current at AC-23, 400 V.
• Withdrawable moving part (WMP) configuration.
• IP30 front-side degree of protection.
• Interlockable construction for controlled switchboard operation.
• Designed as the moving part of an Emax 2 withdrawable switch-disconnector assembly.

Reliable Withdrawable Isolation for High-Current Distribution

ABB SACE Emax 2 /MS switch disconnectors are designed for controlled switching and electrical isolation in low-voltage power distribution systems. Unlike an automatic circuit breaker fitted with a protection trip unit, the /MS configuration performs the switching and isolation function while appropriately coordinated protective equipment elsewhere in the installation provides automatic overload and short-circuit protection.

The withdrawable architecture allows the E4.2V/MS moving part to be separated from its corresponding fixed switchboard section, supporting inspection, servicing and replacement. Combined with its 3200 A continuous-current rating and substantial 100 kA short-time withstand capability, the 1SDA073543R1 is particularly well suited to major distribution systems where high current capacity, strong fault withstand and serviceable isolation are required.

Typical Applications

• Main low-voltage distribution switchboards.
• Large industrial power distribution systems.
• High-current incoming and outgoing isolation duties.
• Transformer secondary distribution systems.
• Generator and standby power installations.
• Data centres and critical infrastructure.
• Manufacturing and process plant switchgear.
• Withdrawable high-fault-level distribution assemblies.