How Can I calculate for the photometrics requirements for a street lighting? Data given are: 45 units of 6 meter light pole with 150 watts metal halide lamp, 220 volts and installed in a promenade area.

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can u please tell me how VFD(variable frequency) drive is used as a energy saver....?

12 Answers   Essar, Oracle,

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Does magnetomonopoles exists? one maxwell equation strongly suggests no, but how about their existance in plasma?

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Why is it that North America uses 60 hz frequency while Europe uses 50 hz?

4 Answers  

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what is the formula for transformer oil?

1 Answers  

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how long will take to burst/damage for a CT when secondary in open condition? Experienced: During switchgear testing(Primary current injection test) some of the CT are in open condition, but nothing happen's why?

1 Answers  

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when neutral will carry the current?what could be the magnitude?

7 Answers   Voltas,

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dear friends plz send link about reluctance & universal motor .thank u

4 Answers  

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what is daiod

4 Answers  

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exact difference between electronicsand electrical

5 Answers  

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in a transmission line if the load is suddenly increased in the receiving end of the system the phase shift will ?

1 Answers  

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No load tap changing transformer working

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