Low-voltage Electrical Control Power
According to incomplete statistics on the main low-voltage electrical components used in power drag and transmission systems, my country produces more than 120 series. Nearly 600 varieties and tens of thousands of specifications. These switching appliances have different uses and different conditions of use, so there are different methods of selection, but the general requirements should follow the following two basic principles: safe and reliable use is the basic requirement for any switching appliance, ensuring the circuit and electricity The reliable operation of the equipment is an important guarantee for normal production and life. Economic considerations can be divided into the economic value of the switching appliance itself and the value generated by using the switching appliance.
The former requires reasonable and suitable selection; the latter considers that it must be reliable in operation, without causing economic losses caused by malfunctions that stop production or damage equipment and endanger personal safety. The classification and use environment of the control object (such as motor or other electrical equipment); confirm the relevant technical data, such as the rated voltage, rated power, starting current multiple, load nature, operating frequency, working system, etc. of the control object; understand the electrical appliances Normal working conditions, such as ambient air humidity, relative humidity, altitude, allowable installation azimuth and resistance to shock and vibration, harmful gases, conductive dust, rain and snow; understand the main technical performance (or technical conditions) of electrical appliances, such as Purpose, classification, rated voltage, rated control power, making capacity, breaking capacity, allowable operating frequency, working system and service life, etc.
- May 24, 2020-