Question
Download Solution PDFWhich of the following statements is NOT correct regarding the errors in a Potential Transformer?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFPotential Transformer
A Potential Transformer (PT), also known as a Voltage Transformer, is an instrument transformer used to step down high voltage to a lower, measurable value for metering and protection in power systems.
PTs work on the same principle as a regular transformer but are designed for precision and safety, not power delivery.
Option 3 is NOT correct because:
- Voltage measurement accuracy in a PT depends primarily on the Ratio Error, not just the power angle (phase angle) error.
- Power angle error (or phase error) affects power and energy measurements (since they involve phase relationships), but not voltage measurement alone.
- Voltage measurement is mostly impacted by ratio error, which is the deviation from the ideal voltage transformation ratio.
Last updated on Jun 7, 2025
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