The 1960s marked the initial stage of withstand voltage tester development in my country. Due to limitations in technology, processes, and components, domestically produced withstand voltage testers were few in variety, low in accuracy, and lacked inherent safety performance. They started with simple testing devices used by manufacturers to conduct withstand voltage tests on products or components. A few models were further improved and commercialized, with the dielectric breakdown device being a representative product. Research and production of withstand voltage testers stagnated in the 1970s. In 1970, the JC-4 became the only withstand voltage tester model on the market. Mass production of withstand voltage testers in my country, forming a new category of safety testing instruments, began in the early 1980s. Against the backdrop of the comprehensive formulation and mandatory enforcement of various national safety standards, manufacturers rapidly launched a large number of new products with diverse models. Today, the technical specifications of my country's safety withstand voltage testing instruments are basically equivalent to those of foreign counterparts.
The prototype of the withstand voltage tester-the high-voltage tester-can be traced back a long time, but it was only in the late 1970s, after the widespread promotion of safety standards worldwide, that a truly specialized category of basic safety testing instruments was formed.
