In a power or distribution transformer about 10 per cent end turns are heavily insulated__________?
Correct answer: A. to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns
- A. to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns
- B. to absorb the line surge voltage and save the winding of transformer from damage
- C. to reflect the line surge and save the winding of a transformer from damage
- D. none of the above
Explanation
A line surge produces a nonuniform voltage distribution in the end turns because of the winding's shunt capacitance, placing excessive stress across them. These turns are therefore heavily insulated to withstand the resulting surge voltage.
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