Purpose and Standards of Measurement Winding Resistance
Transformer winding resistance is a fundamental dimension parameter in the electrical electricity industry. Transformer winding resistance is one of the foremost elements that determine the effectiveness of the transformer. It is imperative to measure the winding resistance precisely to make the ideal functioning of the transformer.
To know a transformer's winding resistance is essential. The value is needed for further calculations
and serves several functions like:
1. Checking the internal winding connections.
2. Load loss calculations (short-circuit measurement)
3. The indirect method establishes the winding temperature and temperature rise within a winding.
4. Verifying electric continuity within in a winding
Standard of measuring winding resistance
IEC60076-1 Clause 10.2: "Measurement of winding resistance"
IEEEC57.12.90 Clause 5: "Resistance Measurements"
VDE0532-76-1Table 3.1.1: Associated Standards
It is necessary to understand that the resistivity of the conductor fabric strongly relies upon on the temperature. The typical assertion is with growing temperature, the material's resistivity additionally rises.A value of resistance without the respective temperature is not useful, otherwise the resistance will be considered at room temperature. The indirect method of establishing the winding temperature can be achieved by repeating the resistance measurement at a further random temperature