High voltage fuse One of the simplest protective appliances.
Uses Mainly used for overload and short circuit protection of high-voltage transmission lines, voltage transformers, voltage transformers and other electrical equipment.
Classification According to different installation locations, high-voltage fuses can be divided into indoor high-voltage fuses and outdoor high-voltage fuses. Indoor high voltage fuses are available in RN1, RN2, RN3, RN4, RN5, RN6 and RNZ series. RN2 and RN4 series high voltage fuses are used for short circuit protection of high voltage transformers, but they cannot be used as overload protection. The rest series can be used as overload for users. The protection amount is short-circuit protected, and the RNZ series can be used as overload protection and short-circuit protection for DC power distribution units. Outdoor high-voltage fuses are drop-type fuses, and there are many types, such as RW3, RW4, RW5, RW6, RW7, RW9, RW10, RW11, RW, RWJ, etc.
Engineering principle The structure generally includes a fuse tube, a contact conductive portion, a supporting insulator and a base, and the fuse tube is filled with quartz sand fine particles for arc extinguishing. The fuse is a wire or a metal piece made of a metal material having a lower melting point, and is connected in series in a protected circuit. When the device in the circuit or the circuit is overloaded or malfunctions, the fuse heats up and melts, thereby cutting off the circuit and reaching The purpose of protecting circuits or equipment.
Specifications High-voltage fuses are rated from 3kV to 110kV. The fuses are rated from 0.35A to 400A, and the number of tubes is from 1 to 4.
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