The KLD-GM three-phase common box busbar system shell is made of aluminum alloy or weak magnetic steel plate (stainless steel), and the internal conductor is rectangular or slot shaped busbar (copper or aluminum). The system has a rated current of 6300A and a rated working voltage of 35kV. This system can be widely used for current transmission between generator output lines and transformers, or between transformers and high-voltage distribution. It can also be applied to AC and DC excitation circuits of generators, power supply leads for substations or other industrial and civilian facilities.