Overvoltage and Undervoltage

[laoshuyujianmao]

hi. Does somebody knows if there is standard (IEC Or EN) which defines the overvoltage and undervoltage for industrial application? for example, how many percetages can the voltage be over the norminal voltage. thanks in advance!

 

[carl_arc3x4]

Actually the overvoltage is depend upon the load..
Too much loads will create this because the the loads consume much current and the resulting to decreasing its voltage... it is the voltage resistance and current relationship.... more loads more current is require and the resistance of the wire decreases...
So maintain the correct load or use the power factor coorection...to encrease the effeciency of the loads and maintain the correct power rating because power factor = ) is the process of adjusting the characteristics of electrical loads that create a power factor that is less than one. Power factor correction may be applied either by an electrical power transmission utility to improve the stability and efficiency of the transmission network, or correction may be installed by individual electrical consumers to reduce costs charge to them by their supplier. A high power factor is generally desirable in a transmission system to reduce transmission losses and improve voltage regulation at the load.