advantages of vvvf drives over non vvvf drives for EOT
cranes
Answers were Sorted based on User's Feedback
Answer / vinod
smooth start and stop.
no jerking of load.
exact posiitoning
better protection for motor.
high/low speed selection.
reliability of break shoe.
programmable break control.
easy circutry
reduction in controls
increases motor life
Is This Answer Correct ? | 20 Yes | 3 No |
Answer / sivaramakrishnan.s
Starting current is limited mostly to 1.5 times of motor
Full load current
as there is no contactor for power control maintenance is
less
Is This Answer Correct ? | 9 Yes | 2 No |
if vcb make contact but output notreach give the reason?
what is mean by flux
What will happen if supply frequency change in Transformer KVA rating ?
Why sip ring used in ac motor also why its not used in dc motor?
what is the use of pmg in exciter?
What is systematic error?
how the grounding[earting] is achieved on ships.
What is the value of nuetral current in star connected load when DC is supplied to it???
what is the reason for using 110 volt and 60 hertz ac supply for using power distribution in America?
On what principle electric motor works?
why batteries are rated in ampere hour
Whether should be the oil level in OCTC transfomer? It should be upto winding immersed completely or should be upto tap changer s/w? How it will affect the performance of the transformer. Rating may be 33KVA