What is the percentage voltage error of a potential transformer with the system voltage of 11,000 V and having turns ratio of 100, if the measured secondary side voltage is 105 V?
What is the percentage voltage error of a potential transformer with the system voltage of 11,000 V and having turns ratio of 100, if the measured secondary side voltage is 105 V?
Right Answer is:
4.76
SOLUTION
System voltage i.e Nominal voltage = 11000 V
The voltage Transformation ratio of the potential transformer is
V1/V2 = N1/N2
V1/105 = 100
Primary voltage = Turn ratio × Secondary voltage = 105 × 100 = 10500 V
Percentage of error is the Potential error
= (Nominal voltage − Primary voltage)/Primary voltage
(11000 − 10500)/10500
= 4.76%