Standard low voltage electrical products and low voltage electrical standard content typically includes the use of products, the scope of environmental conditions, technical performance requirements, test items and methods, packaging, transportation requirements, and it is the manufacturer and user acceptance basis. Standard nature of the content can be divided into basic standards, professional standards and product standards three categories. According to the approved standard content level properties can be divided into:? National Standard (GB), the Department of Standards (JB) and the Bureau approved corporate standards (JB / DQ) High Voltage Switchgear 1 Switchgear three on the connected power system short circuit will produce short-circuit current, low voltage, short circuit current dynamic current peak value is the current value (KA), the current for the destruction of the switchgear mainly on the destruction of the electrical power, electrical power generated will damage its cabinet all kinds of electrical installations within switchgear should be able to withstand the impact of current, which is the switchgear dynamic current (peak, KA) switchgear dynamic current should be greater than the short-circuit current peak; 2 short-circuit current in the protected cut before, will remain in a very short time the switch cabinet, switchgear electrical facilities should be able to withstand the effect of the continuing role of short-circuit current, this effect is short-circuit current rms value and duration of work, thermal current switchgear two values ??(KA, S), should be greater than the short-circuit current generated by thermal shock; 3 switch cabinet should be able to run at the rated voltage, in order to meet this requirement, low voltage switch cabinet Xiping principle, countries have developed relatively different voltages one minute the pressure standard, low voltage switch cabinet ShangYinXian principle, switchgear course, have to meet this requirement; 4 switchgear operation, may be transmitted from an external power system came lightning impact, the state also provides switchgear should able to withstand external lightning impulse withstand voltage standard. Zhoukou low voltage switch cabinet principle, low voltage, provided by the Henan Xi Xi Connaught Electrical and Mechanical and Electrical Equipment Co. Connaught. Henan Xi Connaught Electrical Equipment Co. (www.hnxinuo.com) strong, credible, in Zhengzhou, Henan electronics, electrical products processing industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Connaught Electrical and Mechanical study into the brilliant and you work for a better future!