Street iron yoke plate between prolapse and changed the working air gap

Main contactor air cylinder and electric control valve leakage that insufficient air pressure, contactors slow movement; also electrically controlled contactor air cylinder and poor  Voltage stabilizer . Li ti excitation contactor iron working air gap between the core is too large: one is the field contactor coil and yoke gasket between the core mounting bolts loose or loose; second is the street between the iron yoke plate  mcb circuit breaker  and changed the working air gap. Activities are not flexible and exciter armature contactor moving contact arc hood connected with day wear caused by excitation contactor guilty cards. Analysis from the field  power transformers  part of the circuit can be seen only switched on only after all the action, if the three of them turned slowly interlocking coil is energized will cause lag.