Latest Answer: Hi Several factors influence the choice of frequency in an AC system. Lighting, motors, transformers, generators and transmission lines all have characteristics which depend on the power frequency.The first applications of commercial ...
Why do we rate transformer in KVA not in KW?
Latest Answer: Transformer rating is always in KVA rather than in KW. it is due to the fact tha the core loss inside the conductor (which are mainly hysteresis loss and eddy current loss) depends upon the voltage and the iron loss depends upon the current core loss=v^2/R ...
What do you mean power factor?What is the use of Power Factor?
Latest Answer: Theoritically power factor is defined as a ratio of INPUT POWER to POWER CONSUMED. Controlling the power factor is very much important and it ranges from 0.5 to 0.8 ...
Why do we use delta connected capacitor bank in a self excited induction generators and not star connected capacitor bank?
Latest Answer: dlta connection give avalue equal three times than staar connection ...
What is the difference between a capacitor and a condensor?
Latest Answer: hi A capacitor of high rating ie a power capacitor is called as condensor ...
What do you mean by traction system, What type of traction system is used in electric train.
Latest Answer: the electric traction system is the sysatem by which traction motor is moved with loads.now a days ac 25kv,50hz.1-ph system is universaly adopted for traction movement.power comes from ohe equipment via pantograph,dj(circuit breaker) to the transformer,then ...
What is difference between potentiometer and rheostat?
Latest Answer: The difference between potentiometer and rheostat is that the potentiometer can be used for high range of voltage and current but the rheostat cannot be used for high range of voltage or current. Size of the potentiometer is large, rheostat is less.byS.V.Vijayaraj ...
Why are we employing star type transformer at transmission end and delta type transformer at receiving end?
Latest Answer: Delta star transformer used in distribution purpose because of earthfault on star side do no reflect on delta side of winding. Zero phase current is eleminated in delta side of transformer and another reason for delta winding line current = 1.732 * Phase ...
What is the flyback convertor?
Latest Answer: skin effect is the nature of the Alternating current, ie, the current will be distributed in a conductor and will flow more on the surface(skin) of the conductor than at the core this effect is called skin effect. this is mainly due to the eddy currents. ...
View page << Previous 1 2 3 4 [5] 6 7 8 9 10 Next >>
Go Top
