Rittal Sicherungslastschaltleiste Gr.1 250A 1‑pole SV 9677.1 (9677.110)

The Rittal Sicherungslastschaltleiste Gr.1 250A 1‑pole SV 9677.1 is an NH fuse load‑disconnect bar designed for use in switchgear and distribution panels. It provides a secure bolted connection for NH fuses and conductors, enabling safe manual disconnection and load switching within electrical distribution systems. The single‑pole configuration supports installation where individual phase disconnection is required, and the robust construction is intended for industrial and commercial electrical cabinets.

Advantages

This one‑pole load‑disconnect bar is rated for continuous currents up to 250 A and offers a compact solution for NH fuse integration in panel assemblies. The design ensures reliable mechanical clamping and electrical contact for fuses and conductors, reducing the risk of loose connections. Its construction supports safe handling during maintenance and provides clear isolation of the protected circuit, facilitating compliance with standard safety practices in switchgear.

Suitable for

• Integration into switchgear and distribution panels requiring NH fuse holders
• Electrical installations where individual phase disconnection or isolation is needed
• Industrial and commercial power distribution systems up to 250 A per pole
• Retrofit or replacement of existing NH fuse load‑disconnect components

When it may not be suitable

This load‑disconnect bar is single‑pole and rated for 250 A; it may not be suitable where multi‑pole synchronized disconnection is required or where higher current ratings per pole are necessary. It is intended for installation within appropriate enclosures and switchgear and is not a standalone protective device; correct selection of matching NH fuses and upstream protection is required.

Key specifications

• Pole configuration: 1‑pole
• Rated current per pole: 250 A
• Type: NH fuse load‑disconnect bar
• Connection: bolted fuse and conductor termination for secure contact
• Mounting: panel/switchgear mounting compatible with standard NH fuse arrangements

How to use

Mount the load‑disconnect bar inside the switchgear or distribution panel according to the cabinet layout and manufacturer mounting instructions. Install the appropriate NH fuse into the bolted fuse holder and secure conductors with the specified torque to ensure reliable electrical contact. Use the device to manually isolate the circuit by removing or opening the fuse connection during maintenance or fault handling. Verify that upstream protection and earthing arrangements comply with local electrical standards before energising.

What to consider before purchase

• Ensure the 250 A per pole rating matches the intended circuit load and coordination with upstream protection
• Confirm physical compatibility with the switchgear or panel NH fuse arrangement and available mounting space
• Verify required conductor sizes and bolting/torque specifications for secure termination
• Check local regulations and standards for fuse types and isolation requirements

Usage recommendations

Use the Rittal NH fuse load‑disconnect bar within properly designed switchgear, pairing it with suitable NH fuses and correctly rated upstream protection. Perform installation and maintenance only by qualified electrical personnel and follow torque settings and safety procedures to maintain reliable contact and safe isolation during service.