traction current
4.In accordance with the driving characteristics of AC driving locomotive,the working status of its traction transformer is analysed.The questions that should be considered in the traction transformer design of AC driving locomotive are mentioned.These questions are the large short-circuit impedance of traction winding,higher harmonic current,over-excitation and DC magnetization caused by large variation of the network voltage,etc.Some disposal methods are given.
8.Aiming at the break-off frequently fault of traction ventilator automatic switch on type SS 9 electric lo-como tive,the starting current of No. 4venti lator has being tested by FLUKE199ScopeMe ter. It is affirmed that the mo tion parameter of this auto matic switch can not satisfy the design demand.
