Table 5 Detailed parameters of 3, 5 and 7 MVA power transformers.
From: Condition monitoring and fault diagnosis of power transformer based on non-invasive measurement
Model | Transformer 1 | Transformer 2 | Transformer 3 | ||
|---|---|---|---|---|---|
1 | \(P\) | Power rating | 3 MVA | 5 MVA | 7 MVA |
2 | \(V\) | Voltage rating | 33/11 kV | 33/11 kV | 20/6 kV |
3 | \(D\) | Number of discs on the HV winding | 89 | 67 | 69 |
4 | \(OD\) | Outer diameters of the HV winding | 582 mm | 609 mm | 702 mm |
5 | \(ID\) | Inner diameters of the HV winding | 496 mm | 503 mm | 579 mm |
6 | \(T\) | Number of the turns in the HV winding | 1428 | 1206 | 1104 |
7 | \(R\) | Resistance per disc | 1.4 Ω | 2.4 Ω | 0.43 Ω |
8 | \(L\) | Total inductance per disc | 0.16 mH | 0.11 mH | 0.025 mH |
9 | \({C}_{g}\) | Ground capacitance per disc | 0.08 pF | 0.056 pF | 0.12 pF |
10 | \({C}_{s}\) | Series capacitance per disc | 2.1 pF | 9.0 pF | 5.1 pF |
