How reverse power relay sense the power is reverse in the system.

2 Answers  

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star delta connection used in reduce the starting current at 3 times . how its reduce the current please explian .

7 Answers   HP,

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What is Tachometer used to measure?

0 Answers   Blue Star,

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It is a three inch fan and i want it to rotate to other direction .I've tried cutting the wire and reconnecting them inverse like black to white and white to black ,but it won't start rotating when i plug it in that way.And then it works again when i rejoin the wire to the way it is. I don't know what causing the problem.Is there anyone familiar with these small mortor?Any suggestion would be appreciated.Thanks!! http://i296.photobucket.com/albums/mm163/sasukebloodwheel/110527-105859.jpg

2 Answers  

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EXPLAIN THE WORKING OF SERIES REACTOR IN HT CAPACITOR BANKS (FOR VOLTAGES & CURRENTS)

1 Answers  

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what is bus duct and what is differance between bus duct and bus bar

6 Answers  

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I have draw the 350A DC current, so what is the size of cable i can use? Give me the answer with formula

1 Answers  

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what is the pperating squvance in transmission line for circuit braker, isolater & earthing switch.

2 Answers  

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what is frequency transformer?

2 Answers  

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How we can test the Smoke Detectors????

4 Answers   Emerson,

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what is the purpose of reactor in electrical substations ?

2 Answers  

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Battery is a voltage source? give one example of current source and why?

0 Answers   Suzlon,

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