Abstract High-voltage presence indicating systems is used to monitor the state of high-voltage presence or absence, and output anti misoperation contact signal, ensure the normal operation of electrical equipment and the safety of technicians. In this paper, it is introduced the current technical principle of the high-voltage presence indicating systems, it is compared and analyzed the technical advantage and characteristics of capacitor type sensor unit, optical voltage sensor unit, and introduced the main principle of the analog and digital display unit, then it is stated research direction and prospect.
2020, Vol. 21 
