a.)Ammeter and Voltmeter read rms value or avg. value ?
b.)What are symmetrical and Unsymmetrical faults?
Answers were Sorted based on User's Feedback
Answer / denzel101
Ammeters and voltmeters read R.M.S values
Symmetrical faults are balance faults occuring in power
system. For a fault to be classified as symmetrical, all
three phases must draw equal fault currents and the phase
displacement must remain 120 degrees. examples
1. all phases shorted to each other.
2.all three phases shorted to earth.
Unsemmetrical faults occurs when one or two phases are
shorted to earth or two phases to each other.the faulty
phases will draw fault currents which are not equal in
magnitude with healthy phases and does not have 120 degree
phase displacement.
Is This Answer Correct ? | 8 Yes | 1 No |
Answer / anil
ammeter and voltmeter always reads R.M.S value of the measurement only
and when comes to faults
symmetric faults: 3 phase faults
unsymmetrical faults:
1. L-L FAULT
2. L-G FAULT
3. L-L-G FAULT
Is This Answer Correct ? | 2 Yes | 1 No |
MCB is used for high rating &MCB is used for lower rating.What is technical difference between ACB & MCB?
What is the make of breakers, transformers, generators? What are their capacities and ratings?
4 Answers Bharat Bijlee, GHPPL, Tata Motors,
What should be the minimum depth of ground laid 66 kv ht cable?
. What should be the minimum and maximum ohmic value for earthing?
which type your UPS on line,off line give the reason?
How power cable & control cable can be differentiate from each other ?explain?
14 Answers Aster, Finolex, TCE,
Why the vector group of excitation transformer in static excitation system is Dy5?
why number of stator and rotor slots are not equal in IM?
what is MUSS?
A double circuit with dog conductor 66KV Transmission line from wind farm evacuation to feeding substation having capacity of 25MW for transmission. Can same transmission network be considered for further expansion of Power & how much in MW. If we need to expand next 10-15 MW more will there any augmentation is required in transmission network? Kindly reply asap.
When we giving the 3 phase supply to ups system how to coming netural?
0 Answers Juniper Networks, Tata Motors,
domine+aptitude test means?