SSC JE Electrical Engineering 23 Jan 2018 Evening Paper

Question : 144 of 200

Marks: +1, -0

Deter mine the percentage voltage error of a potential transformer with the system voltage of 11000 V and having a turn’s ratio of 104 if the measured secondary voltage is 98 V.

7.35
5.75
6.25
8.84

Validate

Solution:

Measured value
= Turn Ratio × secondary voltage
= 104 × 98 = 10192
Percentage of error

=({\text"True value - Measure value"}/\text" True value")×100

={11000-10192}/11000×100

= 7.35%

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