The full forms of PT and VT, in the context of electrical engineering, are Potential Transformer (PT) and Voltage Transformer (VT).
While the terms Potential Transformer and Voltage Transformer are often used interchangeably, they both refer to the same type of instrument transformer. They are designed to reduce high voltages to lower, measurable levels for metering and protection purposes in power systems. Essentially, PT and VT are different names for the same device.
Therefore:
- PT stands for Potential Transformer.
- VT stands for Voltage Transformer.
These transformers are connected in parallel to the circuit where voltage is to be measured. They provide an accurate representation of the primary voltage on the secondary side, with a known and precise voltage ratio. This allows for safe and accurate voltage measurement using standard measuring instruments.
