Power Systems
String efficiency depends upon

 voltage rating of one SCR.
 voltage rating of whole string.
  all of these.
 no. of SCR in the string.

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Power Systems
Which of the following statement is/are true?Zn

 The neutral grounding impedance Zn appears as Zn in zero sequence equivalent circuit
 both 1 and 2
 nether 1 nor 2
 The neutral grounding impedance Zn appears as 3Zn in zero sequence equivalent circuit

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