Summary

There is a certain severe overvoltage and overcurrent strike called temporary overvoltage (TOV) from power supply side to impact ICT equipment normal operating, which is caused by the fault of public main power grid. Furthermore, The TOV can also transfer to DC power supply of ICT equipment through the grounding point of AC/DC rectifier in telecommunication centre. To mitigate or reduce the loss and damage of the strike of TOV, there are some research results and technical suggestions specified as below:

(1) For TOV on DC power side, the paper analyzes the generation source, transfer path, loss mechanism, TOV stress model and protection scheme etc.

(2) In accordance with the research on theoretical analysis, simulation, testing and verification etc, there are some test methods and solutions proposed.