TR2-S505SC-2.5-R

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Fuses are electrical components used to prevent an electrical circuit from short-circuiting or overloading. The TR2-S505SC-2.5-R is a fuse designed for application in medium-voltage power protection applications. It is a two-pole thermal-magnetic, screw-in type, low-voltage fuse.

Application Field of the TR2-s505SC-2.5-R Fuse

The application field for the TR2-S505SC-2.5-R Fuse includes protection for medium-voltage switchgears, transformers, and capacitor banks. This fuse can handle a wide range of sustained short-circuit current, up to 17kA. It can also be used to protect resistive or inductive circuits, although the induction time is up to 1 ms.

The TR2-S505SC-2.5-R Fuse also provides overvoltage and undervoltage protection due to its dual thermal-magnetic principle. The thermal principle protects against sustained overcurrent, while the magnetic principle protects against transient overcurrent.

Working Principle of the TR2-s505SC-2.5-R Fuse

The TR2-S505SC-2.5-R Fuse is designed with two different operating principles. The thermal principle is based on the resistance of the fuse wire to heat at high current levels. When a fault occurs, an electric arc will heat up the fuse element until it melts, thereby opening the circuit and cutting off the current supply.

The second principle is the magnetic principle. This is based on the magnetic field that is produced when a large current flows through a circuit. The magnetic field will interact with the magnetic core of the fuse to close the contacts of the fuse and open the circuit, thereby cutting off the power supply. This works much faster than the thermal principle but it can be affected by inductive loads and capacitive components.

In conclusion, the TR2-S505SC-2.5-R Fuse is an ideal choice for medium-voltage protection applications due to its dual thermal-magnetic principle. It is capable of handling high short-circuit currents and also provides both overvoltage and undervoltage protection.

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