ISRO Scientist or Engineer Electrical 2015
Instructions
For the following questions answer them individually
Question 72
To limit current chopping in Vacuum Circuit Breakers (VCB), the contact material used has
Question 73
In a three phase four wire unbalanced system, the current in the neutral wire is 18 A. The magnitude of zero sequence current is
Question 74
The positive $$(Z_1)$$, negative $$(Z_2)$$ and zero $$(Z_0)$$ sequence impedances of a solidly grounded system under steady state condition always follow the relation
