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 Related Questions 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 ... Dear AllI wan to know that we are using large type of cable like 300sqmm and other and our load also in much kw but we are using a small type fuse in main supply (not HT Side) how can it bear load. Latest Answer : Fuse rating and cabel selection is depend upon the load current and fuse current is always greater than the load current. Suppose your load is motor then the starting current of motor is 3 times greater than the normal current then your fuse rating ... Why soft starter is provided for higher rating motor? Latest Answer : For a high rating motor the torque is very high. We require a high starting curent in the very begining to develop this torque, so the starter is kept soft so that it does not make the motor off for increasing value of current but the process is done ... When is star-delta, Dol or VFD starters used for the motor? How many times the current rating of the motor wil be drawn on a Dol starter if no OLR used? Latest Answer : If there is a load like conveyor belt, chain drive, etc. then there is considerable time required by the motor to start and come to required load, so there is large current requirement at the time of starting. So to reduce this starting current we ... Can we use a 15kW, 1450rpm motor for 15kW, 960rpm apllication?If yes, what will be the drawbacks? Latest Answer : IR value/winding resistance (should be same for three phase) should be checked in HT motor but in IT IR value will only do. ...
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