The high and low voltage switch cabinet, as the name implies, is the equipment that connects high -voltage or low -voltage cables. Generally, the power supply bureau and the substation are used to use a high -pressure cabinet, and then the transformer is lowered to the low pressure cabinet.It is nothing more than to assemble some protective devices such as switching and cutting circles into electrical equipment.
Basic knowledge
There are many types of high and low pressure switch cabinets. In general, there are the following, such as high -voltage switch cabinets, high -voltage capacitors cabinets, and a low -voltage drawing type switch cabinet.The structure inside this type of switching cabinet is basically the same, including the circuit breaker, as well as the isolation switch of the isolation circuit, the current used to measure and protect, the voltage transformer, the necessary ground switch used to ensure, others also have other ones, there are other things, there are other things, and there are other things.Lightning offer or other devices that protect the voltage.Therefore, the structure inside the switching cabinet is still more complicated, and you must find a professional when repairing.
Design standard of high and low pressure switch cabinet
There are five small rooms in the design standards of high and low pressure switch cabinets. There are five small rooms in high and low voltage switch cabinets. These five small rooms are: circuit breaker room, bus room, small bus room, cable room, and instrument room.The bus room is a place where the main parent line runs through, and the size and strength of the parent line must meet the bus movement and thermal stability value.The small bus room needs to be installed with control, closure, voltage and lighting.In the cable room, there are generally current transformers, zero -sequent transformers, ground switchs, and lightning arresters. Sometimes, voltage transformers and transformers need to be available under some need.The instrument room requires that it must be two -dimensional components, and all these components must be linked through the two -dimensional line to achieve functions such as the control and protection of the switch cabinet, and the transmission signal.
High and low pressure switch cabinet manufacturer
1. Wuxi Huanyu Electric Co., Ltd. 2. Leqing Kexun Electric Co., Ltd. 3. Guangzhou Ruiyi Power Technology Co., Ltd. 4. Manufacturers with high and low switch cabinets in the country are mainly concentrated in Jiangsu, Shanghai, Beijing, ZhejiangIn other areas, Jiangsu is relatively better.In terms of brands, it is mainly divided into well -known internationally renowned brands and well -known domestic brands. The well -known internationally renowned ones are nothing more than ABB, Schneider, Siemens, etc. The relatively expensive price is also very expensive. The current well -known domestic brands are also very good, and the cost performance will be higher.Well -known domestic brands such as Jiangsu Dongyuan Electric, Jiangsu Changshu Kaishou Factory, Beijing Hezong Technology, etc.
Installation of high and low pressure switch cabinet
When installation, the doors and windows of each power distribution room should be a bit tight, and the room must be guaranteed in the room.Then the installation of the power distribution disk must be stable.And the installation of the device in the disk and each component and the terminal box must be firmly connected.Then the lines in the power distribution disk should be arranged neatly, and ensure that the screws should not be loose, and the line head should be connected.Pay attention to the connection of the bolt and insertion and welding when the node.Finally, the correct number of the circuit must be marked at the end of the cable core wire and the ending of the wire.At the same time, it is necessary to pay attention to whether each electrical element in the switch cabinet is running when it is running.When installing oil, you should also pay attention to whether the liquid surface of the oil is normal, whether the color of the oil changes, or whether there is any oil leakage or exudation.At the same time, it is necessary to pay attention to whether the instrument and signal and indicator lights are correct, and whether the position of the relay protector is correct.Also pay attention to whether the mechanical lock between the circuit breaker and the isolation switch is flexible. For example, the electromagnetic lock device should be used, otherwise it will be necessary to check whether the action of the electromagnetic lock is flexible and whether the switch is sensitive.

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