Power cable pulse reflecting the basic principles of current sampling method
as the rising of China's electric power demand and the technical breakthrough unceasingly, unprecedented huge power cable accessories products market, more and more by consumers interested in power cable pulse reflecting current sampling method, small make up in this paper branded micro power companies to share power cable pulse reflecting the basic principle of current sampling method, hope to be of help.
power cable reflected voltage pulse reflecting current sampling method and pulse sampling method is using traveling wave technology, only pulse reflecting current sampling method is used by the popular electric wave signal, the pulse is reflected voltage sampling method using the voltage traveling wave signal.
pulse reflecting current sampling method can also be divided into dc high voltage flashover ( Direct flash) Way and the impact of high pressure flashover ( Impact flash) Way. They are based on the properties of cable fault, the fault cable on the applied dc voltage ( Direct flash mode) Or impulse voltage ( Impact flash mode) , click make fault in discharge, namely the flashover occurred. Then click wear by recording measurement fault popular electric wave signal generated in a back and forth between the test and fault point required time T, then according to the wave propagation velocity V in the cable, can use type ( 5 - 15) Finding fault distance L: visible pulse reflecting current sampling method and the basic principle of voltage sampling method is exactly the same.
pulse reflecting current sampling method of the current pulse signal, is the use of linear current FGC ( 线性耦合器) To measure the flow of charging capacitor impulse current signal. When the discharge pulse voltage ( Or the point of failure reflected voltage) Signal to test side, the short circuit state high voltage capacitor, a strong impulse current signal, recorded by instrument is linear output coupling device, with high pressure loop current is proportional to the sharp pulse current signal.
pulse reflecting current sampling method and the application scope of the same pulse reflected voltage sampling method. Including direct lightning current sampling method is more suitable for flashover fault test, current sampling and flash method of leakage fault and other properties of the fault are very effective.
about the basic principle of power cable pulse reflecting current sampling method is introduced here, today more about power cable products, please continue to focus on electric power company. Electric power company focused on hot and cold shrink cable accessories development and production, hotline: 18156768781