when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

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What is the difference between Delta & Wye windings?

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What are pre paid energy meters ? How it works ?

1 Answers   Siemens,

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diff b/w elcb and rccb

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when i am going to take trail on a 3ph sq.i/m motor 5.5kw, i observed that RPM of the motor is very low as compared to the rated RPM and also it rotates in clockwise in first ON command,and anticlock wise in second ON command. finally i observed that on phase is no available . but iam not clear about, why the motor is rotates in both directions without any phase interchanging.pls answer to my question.

1 Answers  

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why ct is testing using dc.. y cant we use AC insted of dc on POLARITY TEST.

6 Answers  

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What will happen if we give the 3 phase supply to the rotor of slipring induction motor?

3 Answers  

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Why squirrel cage motor can only use with low starting loads ?

0 Answers   BEC,

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What is MODBUS Controller Used for BMS Mointoring???

2 Answers   Emerson,

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what is the diffrence between earth and neutral.

1 Answers  

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How to calculate energy stored in a capacitance

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where the protection CT in neutral of transformer be located, before bifurcation or after bifurcation and why.

2 Answers  

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