Fuses

An electrical fuse is an element that protects the cable and connected devices by interrupting the circuit when the current passing through a line exceeds the permitted value because of an overload or short circuit. It is placed at the head of the line to be protected in residential and commercial distribution boards, industrial panels, motor supply lines and photovoltaic arrays. Miniature circuit breakers that are reset after tripping, miniature circuit breakers with residual current protection, high breaking capacity NH blade fuses and cylindrical cartridge fuses are in separate subcategories; most products are ABB, Schneider Electric and Siemens brand. First determine the fuse type, then choose the rated current according to the cable cross-section and load current, the number of poles according to the network configuration, the breaking capacity according to the short-circuit current and, for a miniature circuit breaker, the tripping curve and, for a fusible fuse, the duty class according to the type of load. Blade and cartridge fuses are of the fusible type; a blown fuse link is replaced with a new one of the same type and rating. A miniature circuit breaker does not detect leakage current; a residual current device or a miniature circuit breaker with residual current protection is required for that.

Products

How to choose Fuses

An electrical fuse is an element that protects the cable and connected devices by interrupting the circuit when the current passing through a line exceeds the permitted value because of an overload or short circuit. It is placed at the head of the line to be protected in residential and commercial distribution boards, industrial panels, motor supply lines and photovoltaic arrays.

  • Separate overcurrent/leakage protection, motor starting and local isolation requirements.
  • Select rated current, pole count and breaking capacity (kA) from the installation calculation.
  • Match coil voltage, auxiliary contacts and tripping curve to the control circuit and load type.

Frequently asked questions

What is Fuses and where is it used?

An electrical fuse is an element that protects the cable and connected devices by interrupting the circuit when the current passing through a line exceeds the permitted value because of an overload or short circuit. It is placed at the head of the line to be protected in residential and commercial distribution boards, industrial panels, motor supply lines and photovoltaic arrays.

What should I compare when choosing Fuses?

First determine the fuse type, then choose the rated current according to the cable cross-section and load current, the number of poles according to the network configuration, the breaking capacity according to the short-circuit current and, for a miniature circuit breaker, the tripping curve and, for a fusible fuse, the duty class according to the type of load.

Which product groups are available under Fuses?

The current subcategories include Miniature Circuit Breakers with Residual Current Protection, Blade Fuses, Miniature Circuit Breakers, Cylindrical Cartridge Fuses. Open a subcategory to compare its products and technical details.

Fuses Selection Guide