SSC JE Electrical Engineering 24 Jan 2018 Morning Paper

Question : 148 of 199

Marks: +1, -0

Determine the secondary voltage (in V) of a potential transformer, when the value of the system voltage is 6600 V, the turn ratio of the potential transformer is 107 and the percentage voltage error of the transformer is 7%

84.6
76.4
57.4
54.2

Validate

Solution:

Voltage error = 7%
Turn ratio = 107
System voltage = 6600 V
Now Voltage error

={V_t-V_m}/t

Now

V_t=6600/107V

∴ Voltage error

= {6600/107-\V_\m}/107

7/100={6600/107\V_m}/107

\V_\m = 57.4\V

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