TransformerprotectionTransformerLineSetting of current input:Set parameterCTStarPoint withTransformer asreference object.Correct setting is"ToObject"ForwardReverseDefinition of directionfor directional functionsLine protectionSetting of current input:Set parameterCTStarPoint withTransformer asreference object.Correct setting is"ToObject"Setting of current input:Set parameterCTStarPoint withLine asreference object.Correct setting is"FromObject"IED IEDIEC05000460 V2 EN-USFigure 5: Example how to set CTStarPoint parameters in the IEDThis example is similar to example 1, but here the transformer is feeding just oneline and the line protection uses the same CT as the transformer protection does.The CT direction is set with different reference objects for the two IEDs though itis the same current from the same CT that is feeding the two IEDs. With thesesettings, the directional functions of the line protection shall be set to Forward tolook towards the line.4.2.2.3 Example 3 SEMOD55055-35 v7One IED used to protect two objects.Section 4 1MRK 505 393-UEN BAnalog inputs42 Line differential protection RED650 2.2 IECApplication manual
