4.2.4.1 ExampleConsider a VT with the following data:132kV 120V3 3EQUATION1937 V1 EN (Equation 21)The following setting should be used: VTprim=132 (value in kV) VTsec=120 (value in V)4.2.4.2 Examples how to connect, configure and set VT inputs for most commonlyused VT connectionsFigure 21 defines the marking of voltage transformer terminals commonly used aroundthe world.A(H1)B(H2)b(X2)a(X1)A(H1)N(H2)n(X2)a(X1)b) c)A(H1)N(H2)dn(X2)da(X1)d)VPri+ +VSeca)ANSI11000175_1_en.vsdANSI11000175 V1 ENFigure 21: Commonly used markings of VT terminalsWhere:a) is the symbol and terminal marking used in this document. Terminals marked with a dot indicatethe primary and secondary winding terminals with the same (positive) polarityb) is the equivalent symbol and terminal marking used by IEC (ANSI) standard for phase-to-groundconnected VTsc) is the equivalent symbol and terminal marking used by IEC (ANSI) standard for open deltaconnected VTsd) is the equivalent symbol and terminal marking used by IEC (ANSI) standard for phase-to-phaseconnected VTsIt shall be noted that depending on national standard and utility practices the ratedsecondary voltage of a VT has typically one of the following values:1MRK 511 286-UUS A Section 4Analog inputs71Application manual
