Interested to Buy Any Domain ? << Click Here >> for more details...
1.In two wattmeter method if one wattmeter shows Negative
reading then wat is reason?
2.Wat is the reason for low voltage in houses?
3.Wat is meant by current and voltage? wat is difference
between the two?
- 10 Answers
- 65580 Views
- Engineering, I also Faced
- E-Mail Answers
Answer Posted / dileep
two watt meter method is used in measurement of power under un balanced condition.there are two reasons for - ve value
1). if load consist of more inductivd or capacive load with negligible resistive then it will show _ve value .pf angle is more than 65 deg
. in case of induction motor no load test one of the watt meter will indicate _ve because no load pf is 0.2 lag pf angle is nearer to 75 deg
2).reverse. connections of current coil
| Is This Answer Correct ? | 98 Yes | 6 No |
Post New Answer View All Answers
What is EMC filter in VVVF Drive ?
What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?
how to calculate the breaking capacity of different breakers.
Where I can get the sample question for post of Junior engineer electrical-II For RRB Bhubaneswar.
i installed 100kva ups. what KVA genset they should provid in input side? plz any update formula or ans with reason.
how to determine motor size for a fan application?
What is the purpose of using busbar mounting fuse?
how can i change the rotation of the AC single phase induction motor and show me by diagram
DEAR SIR/MADAM,CLEARLY EXPLAIN ABOUT CRAWLING AND COGGING EFFECTS IN INDUCTION MOTOR.
what is mind in cable
where can i get vijaya electricals limited in hyderabad interview auestions can u give me the website address plz
Mention the methods for starting an induction motor?
what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?
Why we are using Isolation Power Transformer inplace of commercial power transformer? What's the difference between them?
any one can explain what is the size of pvc,armoured, various sizes of powr cable dia?
