Ct Vt Ratios: CT_PROTECTION_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 | composite error pct (%) | current error pct 100 (%) | phase disp crad (centiradians) | phase disp min (minutes) | standard |
|---|---|---|---|---|---|---|
| CT_PROTECTION_IEC | 10P | 10 | 3 | — | — | IEEE Std 3004.1-2013 |
| CT_PROTECTION_IEC | 5P | 5 | 1 | 1.8 | 60 | IEEE Std 3004.1-2013 |
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