Which equipment is connected to the high-voltage fuse and how to connect it

After purchasing a circuit breaker, you will consider whether a matching fuse is required. In the general power sector, whether it is a 10kv or higher-level substation or power plant, it is impossible to install high-voltage fuses in the primary main circuit. Generally, fuses are installed in the voltage transformer of the protection and measurement circuit or the high-voltage primary circuit of the transformer.

High-Voltage Limit-Current Fuse For Protection Of Voltage Transformer

High-voltage fuses can be used as overload and short-circuit protection for distribution lines, power transformers, voltage transformers, and power capacitors. They are characterized by simple structure, cheap intervals, convenient maintenance, small size, and reliable use.

2. The structure of the high-voltage fuse generally includes a fuse tube, a contact conductive part, a support edge, and a base, and the fuse tube is filled with fine quartz sand for arc extinguishing. The fuse is a metal wire or sheet made of metal material with a low melting point, which is connected in series in the circuit to be protected. When the circuit or equipment in the circuit is overloaded or fails, the fuse will heat up and melt, thereby cutting off the circuit and achieving The purpose of protecting a circuit or equipment.

The connection method of the fuse is very important, and it is often directly related to the future use of the fuse. If the connection is wrong, there may be an unnecessary danger. Therefore, when using it, we should pay attention to the connection method. Today we will learn How to connect the high-voltage fuse!
(1) The incoming and outgoing wires of switching appliances and high-voltage fuse control boards are generally connected by terminals or lugs, which can be selected according to the size of the current and the number of incoming and outgoing wires.
(2) Between electrical cabinets (boxes), control boxes, cabinets (tables), and between them and the fuses to be fused, use high-voltage load switch terminal blocks or industrial connectors to connect.
(3) Various types of standard connectors should be used for connection between weak current control components and printed circuit board components.
(4) The connection between the components in the electrical cabinet (box), control box, and cabinet (table) can be directly connected by using the terminal blocks of the components themselves. Terminal handling.

Whether it is a high-voltage user or a low-voltage user, if it is set, it will increase unnecessary troubles (that is, one more point that causes a fault). If one phase is still in poor contact, or a certain phase is blown, it will bring losses to the user (the lack of phase The motor will burn out), and the equipment provided by the supplier of the circuit breaker can fully meet the protection action under abnormal conditions such as short circuit, low voltage, overload - tripping! If it is a low-voltage user, there is no need to consider what the main fuse to install on the low-voltage side of the transformer, because the drop insurance (actually a fuse) has been installed on the high-voltage side of the transformer.