What is internal overvoltage?

Internal overvoltage is due to the operation (switch,switch) accident (grounding,bolt,etc.) or other reasons,cause sudden changes in the state of the power system,there will be a shift from a steady state to another steady state transition process,the system may be produced in the process is in danger of overvoltage,the overvoltage is within the system caused by the electromagnetic energy buildup of oscillation and,so called internal overvoltage.It can be divided into operating overvoltage and resonance overvoltage,the former is generated single phase induction motor by system operation or fault,which is in the grid cell capacity and inductance components in grid (especially with iron core of ferromagnetic inductance components),parameters of unfavorable combination resonance.Because impact relay action is to rely on impact current,the launch of the signal () to accuse or accident signal circuit action,to make impact relays XMJ repetitive movements,namely the requirements after the first pulse signal action immediately return,ready for action again.

At this point if you don't add the keep circuit,pulse signal disappears,electric motors 12 volt sound (buzzer or alarm) will end immediately.Issued in order to guarantee reliable sound signal,without impact relay XMJ back and stop,so in startup sound in the middle of the relay circuit with a stay.Operation at execution time because the guardian,the guardian hands perform operation shall not exceed a.Sequence of operation shall not be temporary.Each perform a,the guardian is responsible for the inspection before permanent magnet generators for sale operation after location and preparation of votes,people listened to correct after the operation,the guardian operations are executed immediately.Each performed in red ink.Performed the operation ticket cover chapter executed,save for three months,the director of the substation should check once a month operation. In the following situations power capacitor should be work out immediately,and report the scheduling: (1) the power capacitor explosion; (2) joint serious overheating or melt; (3) casing put serious lightning collaterals; (4) capacitor serious injection or fire; (5) www.facebook.com/dongfeng.motor more than 40 ℃ ambient temperature.