Gimate chamber are specidl designed for diferent type of troction battery test, On the basis cf standard cimatrc chamber, protection mechanisms are provided to different hazard level, to ensure the safety of company personnel, property and equi pment Distributed common Dc bus technology conerts Ac power to a high-vdtoge Dc bus via extemal bidrectional AcDc units, ik then provides energy to eoch channe! trough hig'rto low vokoge Dcoc bidirectianal inve ters, foch channel can ahso form a Dc microgrit through the bus to iprove comversion efficiency. Can achieve energy saving, reduce equipment maintenance as wel as the footpint of the equipment.