In this paper

it is thought after the analysis of the device that the fixed access device has such hidden dangers as high overvoltage due to reclosing operation of line and over compensation which is possibly occurs during the operation.In case of adopting external fuse or internal fuse wire as internal fault protection of capacitor

the number of parallel connected capacitors for each phase not less than 4 units and sufficient shunt elements in the series connection section inside the capacitor are required respectively.Based on this reason the suggestions has been put forward that appropriately increase the number of shunt elements

improve withstand voltage strength of elements and add imbalance protection.