Partial discharge monitoring system with a compatibility-function for a voltage indication system

A partial discharge measuring system for a medium-voltage or high voltage apparatus comprising:

• a partial discharge-module, arranged in a low-voltage portion and adapted to monitor, whether a Partial Discharge occurs within a dielectric of the high-voltage or medium-voltage apparatus or system,
• the partial discharge-module or a VIS being electrically connected to a coupler provide in the high-voltage portion;
• a deactivation module adapted to be electrically connected to the VIS in a low-voltage portion and to the partial discharge-module, the VIS further comprising an optical display to indicate the presence of an operating voltage in the high-voltage or medium-voltage portion,
• the deactivation module being further adapted such, that the optical display of the VIS is not activated when a partial discharge measurement is running;
• wherein
• the partial discharge-module is adapted to ensure, that a time portion in which the Voltage Indication System indicates the presence of an operating voltage in the high-voltage or medium-voltage portion is longer than a time portion in which the Voltage Indication System does not indicate the presence of voltage in the high-voltage or medium voltage portion.