1SDA073507R1 ABB E4.2V/MS 4000 3p WMP Switch Disconnector

Why Choose the ABB E4.2V/MS 4000 3p WMP Switch Disconnector?

The ABB E4.2V/MS 4000 3p WMP, order code 1SDA073507R1, is a high-current three-pole withdrawable air switch disconnector from the ABB SACE Emax 2 range. Designed for demanding low-voltage power distribution systems, it combines a substantial 4000 A rated uninterrupted current with the serviceability and operational flexibility of a withdrawable switchboard design.

Built on the E4.2 frame with ABB's V performance level, the E4.2V/MS provides a rated short-time withstand current of 100 kA for 1 s. This high withstand capability makes it suitable for installations with significant prospective fault currents, while appropriately coordinated protective equipment elsewhere in the system provides automatic overload and short-circuit protection.

This model is supplied as a withdrawable moving part (WMP) in a three-pole configuration. With a rated operational voltage of 690 V AC and AC-21 and AC-23 current ratings of 4000 A at 400 V, the 1SDA073507R1 provides a robust solution for high-capacity switching and electrical isolation in industrial, commercial and infrastructure switchboards.

Key Advantages

• High-capacity 4000 A rated uninterrupted current for major low-voltage distribution systems.
• 100 kA short-time withstand current for 1 s for demanding high-fault-level installations.
• Withdrawable moving-part design supports servicing and switchboard maintenance.
• 690 V AC rated operational voltage for industrial low-voltage networks.
• 4000 A AC-21 and AC-23 ratings at 400 V for demanding switching duties.
• Three-pole construction for simultaneous switching and isolation of phase conductors.
• 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.
• 4000 A rated uninterrupted current (Iu).
• Three-pole configuration.
• 100 kA rated short-time withstand current (Icw) for 1 s.
• 690 V AC rated operational voltage (Ue).
• 4000 A rated permanent current at AC-21, 400 V.
• 4000 A rated permanent current at AC-23, 400 V.
• Withdrawable moving part (WMP) construction.
• Bolt-connected main circuit interface.
• IP30 front-side degree of protection.
• Interlockable construction for controlled switchboard operation.
• Optional motor drive and voltage release supported by the Emax 2 platform.

Reliable Withdrawable Isolation for High-Power Distribution

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

The withdrawable architecture allows the E4.2V/MS moving portion to be separated from the corresponding fixed switchboard part, supporting inspection, servicing and equipment replacement. Combined with its 4000 A continuous-current capacity and 100 kA 1-second short-time withstand capability, the 1SDA073507R1 is particularly well suited to major switchboards where high current capacity, strong fault withstand and serviceable isolation are essential.

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.