Tricky but Easy Electrical Engineering!
First question which strikes in our mind is that why do we need to do DCRM even though we already had Contact Resistance Measurement,CRM? Seems good question and this question will take you to the depth. So, first of all we need to know about the contacts of Circuit Breaker. Basically, a CB has two types … Read more
Long Shunt and Short Shunt DC Compound Machine: In short shunt DC Compound Machine, shunt filed winding is connected across the Armature whereas in Long shunt connection it is connected across the line terminal. But there is no difference in operating characteristic in two types of machine. DC Shunt Generator Characteristics: There are four basic … Read more
D. C Motor Starting: Why Starter Needed: Let Vt = Terminal Voltage Ia = Armature Current ra = Armature Resistance Ea = Back emf = KaØWm At the time of starting, speed of motor is zero hence Wm = 0, therefore there will not be any Back / Counter emf. Hence if we … Read more