The HVVAC405 Vacuum Switch Tester uses a computer for synchronous control, data acquisition and processing, and the sensitivity in the field to test the vacuum interrupter arc chamber typically at 10-5Pa.

The most prominent feature of this instrument is the use of a new excitation coils and data processing methods to achieve the non-destructive measurement of vacuum. The instrument is practical, easy to use, easy to operate, with a high precision measurement without disassembly, widely used in electric power, steel, petrochemical, textile, coal, railways, and other trades using the vacuum switch.

For a vacuum circuit breaker, the method of determining the condition of the vacuum tube is using the method of frequency withstand voltage testing, but this method only determines the vacuum interrupter arc chamber of the serious deterioration. When the vacuum of vacuum interrupter arc chamber degrades to 10-2-10-1 Pa, although the breakdown voltage is not reduced, but the interrupter arc chamber has failed. In this Vacuum Switch Vacuum Tester for vacuum switch, the new field coils were used, and with the magnetron discharge method the vacuum of the vacuum interrupter arc can be measured without disassembling the interrupter arc chamber.