how to test the turn ratio of 3 phase transformer using volt meter shoe the curcit diagram.

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What is difference between A.C & D.C Resistance ?

4 Answers  

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What are the two types of compensation?

0 Answers  

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What is clean Earth System ?

3 Answers  

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what is the difference between between open delta and broken delta?

5 Answers   Reliance,

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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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What is the function of attenuator in cro?

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What is primary distribution and secondary distribution of ac power?

3 Answers  

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when the time of backcharging the transformer three phases only enough or three phase with neutral is must.from these which one is the best one.

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There are two nos of 33Kv/11Kv 5MVA transformers conecting through HT cable from substation having metering at substation itself.One transformer used at a time another remains stand by.Further 11 nos of 11Kv/440V transformers are attached on it and each transformer is having its own Power factor correction panel.Now one 33/11Kv transformer at no load condition/Stand by condition is having power factor in leading side upto 0.21 and while when another tranformer at same situation have power factor in lagging 0.42. Now one thing is clear that transformer one is having 1.5 Km long 33kv cable due to that PF goes in leading side and another is having only 250 mtr length remains him lagging. Now i want to know that how i can maintain the Power factor at no load/ stand by position though both are behaving in seperate manner.

1 Answers  

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What are the condition for parallel operation of transformers?

2 Answers   Alfanar,

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what is excitation/

0 Answers   ABB, Tata Steel Limited,

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