1SDA073474R1 ABB E6.2X/f/MS 6300 4p FHR Switch Disconnector

Why Choose the ABB E6.2X/f/MS 6300 4p FHR Switch Disconnector?

The ABB E6.2X/f/MS 6300 4p FHR, order code 1SDA073474R1, is a high-performance four-pole air switch disconnector from the ABB SACE Emax 2 range, designed for switching and isolation in very high-current low-voltage power distribution systems. Built on the E6.2 frame, this fixed /MS configuration provides a substantial 6300 A rated uninterrupted current for major industrial, commercial and infrastructure electrical installations.

The E6.2X/f/MS represents the high-withstand X performance level, providing a rated short-time withstand current of 120 kA. This exceptional withstand capability makes the device suitable for demanding switchboards and distribution assemblies with very high prospective fault currents, while appropriately coordinated protective equipment provides automatic overcurrent and short-circuit protection.

This model is supplied in a fixed four-pole configuration with full-size neutral and rear horizontal terminals (FHR). With a rated operational voltage of up to 690 V AC, AC-21 and AC-23 current ratings of 6300 A at 400 V, and a robust Emax 2 construction, it provides dependable high-capacity switching and isolation for critical power distribution installations.

Key Advantages

• Exceptional 6300 A rated uninterrupted current for major power distribution systems.
• High 120 kA rated short-time withstand current for installations with severe prospective fault levels.
• Four-pole configuration with full-size neutral for comprehensive circuit switching and isolation.
• 690 V AC maximum rated operational voltage suitable for industrial low-voltage networks.
• 6300 A AC-21 and AC-23 ratings at 400 V for demanding switching duties.
• Fixed E6.2 construction for permanent integration into high-current switchboards.
• Rear horizontal terminals provide an effective connection arrangement for switchboard busbars.

Key Features

• ABB SACE Emax 2 E6.2X/f/MS switch disconnector.
• 6300 A rated uninterrupted current (Iu).
• Four-pole configuration.
• Full-size neutral.
• 120 kA rated short-time withstand current (Icw).
• 690 V AC maximum rated operational voltage (Ue).
• 6300 A rated permanent current at AC-21, 400 V.
• 6300 A rated permanent current at AC-23, 400 V.
• Fixed built-in installation.
• Rear horizontal main terminals (FHR).
• IP30 front-side degree of protection.
• Motor operator and voltage release options supported by the Emax 2 platform.

Reliable High-Current Isolation for Critical Power Systems

ABB Emax 2 /MS switch disconnectors are designed for controlled switching and electrical isolation in low-voltage power distribution systems. Rather than incorporating the automatic overcurrent protection associated with a circuit breaker trip unit, the /MS configuration performs the switching and isolation function while appropriately coordinated protective devices elsewhere in the installation provide the required fault protection.

With its 6300 A continuous-current capacity and exceptional 120 kA short-time withstand rating, the E6.2X/f/MS is engineered for demanding high-power installations. Its full-size neutral, four-pole construction, fixed mounting and rear horizontal connections make it particularly suitable for major switchboards where high current capacity, strong fault withstand and dependable 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.
• High-fault-level low-voltage distribution assemblies.