Developments of 500 kV Multi-Channel Multi-Gap Self Breakdown

A multi-gap multi-channel (MGMC) switch of 500 kV has been developed at Pohang Accelerator Laboratory (PAL). It consists of ten of gaps to increase self-discharge voltage by filling up the gas. A structure of a multi-gap switch can increase its inductances. Thus, in order to solve those problems its structure made by multi-channels had been designed to decrease the inductance effects. The fabricated switch tested using marx generator of 500 kV. The design concept and its characteristics will be discussed.