Etipo NH fuse insert ETI Polam NH1/WT-1 004139130 gF 100 A 500 V industrial fast

Etipo NH fuse insert ETI Polam NH1/WT-1 is a gF-type NH1 cartridge designed for industrial overcurrent protection. Rated for 100 A and 500 V, this fast-acting fuse element interrupts both short-circuit and overload currents and is intended for use in NH fuse holders and industrial switchgear. The construction and performance characteristics make it suitable for coordinated protection of motors, distribution feeders and control circuits in manufacturing and utility environments.

Advantages

This NH1 fuse insert offers fast operation and reliable interruption of fault currents, helping to minimise damage to equipment and wiring. Its gF characteristic provides combined short-circuit and overload protection, simplifying protection schemes where a single device must cover a range of fault types. The cartridge form factor is compatible with standard NH holders and switchgear, enabling straightforward replacement and maintenance.

Suitable for

• Protection of motor circuits and starters in industrial installations
• Main and sub-distribution feeders in factories and commercial buildings
• Protection of control and auxiliary circuits in switchgear
• Applications requiring coordinated short-circuit and overload protection

Key specifications

• Type: gF (general fuse for combined short-circuit and overload protection)
• Format: NH1 cartridge
• Rated current: 100 A
• Rated voltage: 500 V
• Operating characteristic: fast-acting (suitable for rapid fault clearing)

How to use

Install the NH1 cartridge into a compatible NH fuse holder or fuse switchgear according to the equipment manufacturer’s instructions and local electrical standards. Ensure the supply is de-energised before replacing or fitting the fuse insert. Verify correct rated current and voltage for the circuit being protected, and confirm compatibility with upstream and downstream protective devices to achieve coordinated protection.

Usage recommendations

Select this 100 A, 500 V gF NH1 fuse insert when a fast-operating device is required for combined short-circuit and overload protection. Regularly inspect and test associated fuse holders and switchgear; replace the cartridge after any clear indication of operation or visible damage. Follow applicable national wiring regulations and the switchgear manufacturer's guidance for maintenance intervals and safe handling.