Study on the Electrochromic Label for High-voltage Equipment with Wo3

Whether the equipment is charged or not is a working procedure that must be carried out to ensure the safety of personnel during the power failure maintenance work on the power transmission and transformation equipment. At present, UHV power transmission equipment mainly uses contact, non-contact electroscope to check whether the equipment is electrified. However, this type of electroscope needs a wide response range because the stray capacitance to ground is greatly affected by the actual working environment and operating position. At the same time, the contact type high voltage electroscope generally needs to be used with the insulated test pole. As the voltage level rises, the required safety distance increases. The length and deflection of the test pole cannot meet the requirements. The overall quality is larger and the operation is inconvenient. The use of material colour changes to indicate the charged state of the device is a promising technical means. Based on the electrochromic technology, this paper makes use of tungsten trioxide materials to prepare charged state indicator materials for UHV transmission equipment, and characterizes whether the equipment is charged by the colour change of materials. Experiments show the effectiveness of the material.