Potential Transformer (PT)?
A Potential Transformer (PT), also known as a Voltage Transformer (VT), is a type of instrument transformer used to step down high voltage to a lower, measurable level. It is primarily used for metering and protection in electrical power systems.
Functions of a PT:
1. Voltage Reduction: Converts high voltage to a lower voltage suitable for measurement.
2. Instrumentation: Provides input to meters, relays, and protection devices.
3. Safety: Electrically isolates high-voltage circuits from measuring instruments and control systems.
Types of Potential Transformers:
1. Electromagnetic PT: Uses a traditional transformer design.
2. Capacitive Voltage Transformer (CVT): Used for high-voltage applications, utilizing a capacitor divider.
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