When there are metal armor layers such as copper or steel tape outside the cable, the induction method cannot be detected, and the capacitance method is used at this time. Suitable for all cables; Understand the principle of capacitance testing when using the capacitor method - when testing capacitors, the AC/pulse signal is used in the test loop, that is, the AC partial voltage is measured or by charging and discharging the capacitor (two mutually insulated metal poles), the accumulated electri

Under normal circumstances, the computer cable we use is a cable composed of an array of wires twisted, and each group of wires are insulated between, the general structure is twisted around a center into a rope core, some are a set of shielding layer, some are the whole cable core covered with shielding layer, in addition, according to the laying conditions and construction environment, in order to play a certain protective role for the cable, Some computer cables also have an armouring layer a

Most of the wire and cable people usually buy are ordinary cables, some places use high-voltage cables or fire-resistant cables, today, wire and cable to share with you is flame retardant cable: flame retardant cable will not be burned?

1. What are the quality requirements of stranded conductive wire core?

9. What are the main differences between disc winch and cage winch?