Ct Vt Ratios: VT_ACCURACY_IEC
CT and VT standard ratios, accuracy classes, burden designations, and IEC/IEEE accuracy limits per IEEE C57.13 and IEEE Std 3004.1-2013. Covers metering CTs, relaying CTs (C-class), standard CT/VT burdens, and IEC accuracy limits.
| instrument transformer type | ratio designation | phase disp crad (centiradians) | phase disp min (minutes) | standard | voltage ratio error pct (%) |
|---|---|---|---|---|---|
| VT_ACCURACY_IEC | 0.1 | 0.15 | 5 | IEEE Std 3004.1-2013 | 0.1 |
| VT_ACCURACY_IEC | 0.2 | 0.3 | 10 | IEEE Std 3004.1-2013 | 0.2 |
| VT_ACCURACY_IEC | 0.5 | 0.6 | 20 | IEEE Std 3004.1-2013 | 0.5 |
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