In the case of petrochemical area AC drive & AC motor is used where the speed variation is required. Why they are not Using DC drive & DC motors in such areas?

1 Answers  

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how can i select the cable ratings

4 Answers  

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why ht motors are connected in star?

1 Answers  

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why we use ac as a electric appliance in home or daily use?

1 Answers   MNC,

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Why let through energy not considered for ACB breaker while cable sizing?

0 Answers  

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Zone of protection and tripping scheme of arc protection relay.

0 Answers   KSEB, L&T, Siemens,

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Why IR value of the (HT cable Plus synchronous motor) is less while individually having IR values in GΩ?

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Hi Suppose we have a wye/wye transformer which is grounded at both sides,in this situation, do we have ay ground transformer? in other words, ground transformer can do any thing more (while we have nuetral wire in both sides)? As the last question, what about 3rd harmonic? we have two choices: first using wye/delta transformer + ground transformer and second using wye/wye earthed connection.in the former choice, we dont have 3rd harmoonic at the secondary side but what about Yn/yn conection? do we suffer from 3rd harmonic in the Yn/yn connection?

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State kirchoff current law?

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WHAT DRESS I SHOULD WEAR WHILE ATTENDING AN INTERVIEW? PLEASE SPECIFY THE STYLE AND COLOUR. CAN A LADY WEAR CHUDIDAR FOR AN INTERVIEW?

6 Answers   Wipro,

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What kind of socket shall be provided for window type air conditioner with cooling capacity upto 18000 BTU/hr

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WHAT IS RETARDATION TEST IN DC MACHINES?

4 Answers  

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