Ct Vt Ratios: CT_METERING
Standard current transformer (CT) and voltage transformer (VT) ratios, accuracy classes, burdens, and ratings per IEEE C57.13. Covers metering CTs (0.3 class), relaying CTs (C100–C800), and standard VT ratios.
| instrument transformer type | ratio designation | accuracy class | ratio value (dimensionless) | standard burden VA (VA) | thermal rating factor trf (dimensionless) |
|---|---|---|---|---|---|
| CT_METERING | 100:5 | 0.3 | 20 | 12.5 | 1.5 |
| CT_METERING | 1200:5 | 0.3 | 240 | 12.5 | 1.5 |
| CT_METERING | 1500:5 | 0.3 | 300 | 25 | 1.5 |
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