which is the best, A/C DRIVES or D/C DRIVES for cranes,......
...and why......?
Answer Posted / psingh
AC drive is more suitable for crane HT,CT and LT operation.
It is very east for maint. and cost.
| Is This Answer Correct ? | 6 Yes | 2 No |
Post New Answer View All Answers
Hello Friends, How can we recognize the CT Star Point is S1 or S2 in case of Electro Mechanical Relays and what is meant by Restraining coil in relays and what is the purpose of that.. thank you in advance..
Igfet is a
HOW DOES THE ELECTRONIC ENERGY METER WORKS?
if negative of DC supply used and positive is grounded through EGB, and if ELCB used in the system then is it sense the positive volatge and get tripped is it possible?
what is the difference between switchgear and circuit breakers and is there any difference between outdoor and indoor switchgear and circuit breakers , and how would you differentiate between switch yard and substation and grid station . thanks
High voltage test procedure of in swgr board. why should measure millivolt drop on testing time?
HOW THE OLTC TRANSFORMER SAVE ENERGY IN COMPARISON TO OFF LINE TRANSFORMER AND IS IT ECONOMICAL TO REPLACE THE OFF LINE TRANSFORMER TO OLTC TRANSFORMER
What is systematic error?
Explain about how is it working Earth fault'relay and wahts the resistance value of earth bed
which mm cable should be used for 1.hp immersible pump motor for the distance of 330 metres?
Explain how you intend to work under pressure to meet up with deadline target?
If we have to feed a housing complex having load 8MVA, than what would be the better option, either we first step down 33kv supply into 11kv & than 430v or we proposed no of 33/.44 kv transformer, also which option is economical?
Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.
How to select cable the size, what is the parameters use and what is the formulas use for this cable size calculation?
how to synchronize 3 phase slip ring induction motors of different ratings.