The HV electric energy measuring device is an important part of 10kV distribution network, but the fuse in a transformer branch often malfunctions, endangering the safety of grid. Based on the principle of TV, this paper focuses on the overcurrent causing by the increasing of signals’ amplitude and frequency when 2 TVs are connected with the V method. That the current caused by stray capacitance of TV is greater than 1A is the key inducement for high voltage fuses to malfunction when vacuum circuit breaker action is proposed. Then, Ansoft Maxwell and ATP-EMTP are respectively used to calculate the stray parameters and to build the simulation model. During the vacuum circuit breaker’s operation, with three-phase asynchronism being taken into account, overcurrent under different circumstances are analyzed. Finally, measures based on the control of asynchronism and stray capacitance are taken to suppress overcurrent, which can reduce risks of a fuse’s malfunction and is of significance in improving the reliability of HV electric energy measuring device.