Electrical switch accessory Rittal SV 9677.485 — steel housing, contact clamp for NH fuse disconnect rails

Rittal SV 9677.485 is an electrical switch accessory supplied as a pack of three contact clamps housed in steel. Designed for use with NH fuse/disconnector rails (groups 1–3), this steel housing contact clamp provides a robust connection point within distribution and control enclosures. The accessory is intended to facilitate secure electrical connections and mechanical fixation in industrial switchgear and panel installations where NH fuse disconnect rails are used.

Advantages

The steel housing and steel construction deliver mechanical strength and resistance to deformation during installation or maintenance. Supplied in a set of three, the contact clamps allow multiple connection points or replacement of worn parts. The design is compatible with NH fuse/disconnector rails groups 1–3, enabling a standardized mounting and reliable electrical contact in common industrial applications.

Suitable for

• Maintenance and replacement of contact clamps in industrial switchgear and distribution panels
• Installation of NH fuse disconnect rails in control cabinets and distribution enclosures (groups 1–3)
• Applications requiring durable steel housings for electrical connection points

When it may not be suitable

This accessory is specific to NH fuse/disconnector rails groups 1–3 and may not fit rails or fuse holders outside these group specifications. It is a mechanical/electrical contact clamp and does not include fuses, disconnecting switches, or insulating covers. For applications requiring non-metallic housings, integrated insulation, or parts tailored to other fuse group standards, a different accessory should be chosen.

Key specifications

• Material: steel housing and steel construction for the clamp
• Pack quantity: three contact clamps per package
• Compatibility: designed for NH fuse/disconnector rails, groups 1–3
• Application area: distribution and control enclosures, industrial switchgear

How to use

Mount the contact clamp onto the NH fuse/disconnector rail in accordance with the rail manufacturer’s installation instructions and applicable electrical safety standards. Ensure the rail and mating surfaces are de-energized, clean, and free of corrosion before fitting. Secure the clamp mechanically so that it provides firm contact with the rail and connecting conductors. After installation, verify electrical continuity and mechanical stability and restore power only after confirming correct fit and secure fastening.

What to consider before purchase

• Verify that your NH fuse/disconnector rails conform to groups 1–3 and that the clamp dimensions are compatible
• Confirm that a steel housing and steel clamp material meet your environmental and insulation requirements
• Ensure pack quantity (three pieces) aligns with the number of replacement parts or installation points needed

Usage recommendations

Use the contact clamps only in de-energized circuits during installation and maintenance. Follow manufacturer and local electrical codes for torque settings, contact cleaning, and testing to ensure reliable electrical connection and safe operation within switchgear and control enclosures.