1SDA073443R1 ABB E2.2N/MS 1000 4p FHR Switch Disconnector

Why Choose the ABB E2.2N/MS 1000 4p FHR Switch Disconnector?

The ABB E2.2N/MS 1000 4p FHR, order code 1SDA073443R1, is a high-performance four-pole air switch disconnector from the ABB SACE Emax 2 range, designed for dependable isolation and switching in low-voltage power distribution systems. Based on the E2.2 frame, this /MS version provides the isolation characteristics required by IEC 60947-3 while retaining the robust construction and accessory platform of the Emax 2 family.

Rated for a continuous current of 1000 A, the E2.2N/MS combines four-pole switching with a high short-time withstand capability. The N-performance version provides an Icw of 66 kA for 1 s, making it suitable for demanding industrial and commercial distribution systems where reliable isolation and high fault-current withstand are required.

This model is supplied in a fixed four-pole configuration with adjustable horizontal rear terminals (FHR). It is rated for operation up to 690 V AC, with a rated insulation voltage of 1000 V AC, and is suitable for AC-23A utilisation applications.

Key Advantages

• High-capacity 1000 A four-pole switch disconnector for low-voltage distribution.
• 66 kA short-time withstand current for 1 s for demanding power systems.
• Fixed E2.2 frame provides a robust solution for permanent switchboard installations.
• Adjustable horizontal rear terminals support flexible busbar and conductor arrangements.
• Rated operating voltage up to 690 V AC.
• Designed to provide dependable circuit isolation in accordance with IEC 60947-3.
• Part of the established ABB SACE Emax 2 platform with extensive accessory options.

Key Features

• ABB SACE Emax 2 E2.2N/MS switch disconnector.
• 1000 A rated uninterrupted current (Iu).
• Four-pole configuration.
• 66 kA Icw at 1 s.
• 50 kA Icw at 3 s.
• 690 V AC rated operational voltage (Ue).
• 1000 V AC rated insulation voltage (Ui).
• AC-23A utilisation category.
• Fixed installation configuration.
• Horizontal adjustable rear terminals (FHR).
• Designed for 50/60 Hz AC power systems.

Reliable Isolation for High-Current Power Distribution

ABB Emax 2 /MS switch disconnectors are derived from the Emax 2 air circuit-breaker platform and are designed specifically for switching and isolation duties. Unlike an automatic circuit breaker, the /MS switch disconnector does not incorporate the protection trip unit used for automatic overcurrent protection; its primary role is to provide controlled switching and secure electrical isolation.

When open, the E2.2N/MS provides the isolating distance required for downstream electrical equipment. Its 1000 A current rating, four-pole architecture and 66 kA short-time withstand capability make this model particularly suitable for high-current switchboards, industrial distribution assemblies and infrastructure power systems.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution and isolation systems.
• Commercial and infrastructure electrical installations.
• High-current switchgear and control assemblies.
• Main incoming and outgoing isolation duties.
• Generator and transformer distribution systems.
• Machinery and process plant power distribution.