ABB RED615 Technical Manual

Also see for RED615 ANSI: Product guide Applications manual Applications manual Point List Manual Operation manual

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ABB RED615 Technical Manual Manual pdf 419 page image

In TR2PTDF, it is important that the accuracy limit factors Fa of the phase currenttransformers at both sides correspond with each other, that is, the burdens of thecurrent transformers on both sides are to be as equal as possible. If high inrush orstart currents with high DC components pass through the protected object when itis connected to the network, special attention is required for the performance andthe burdens of the current transformers and for the settings of the function block.4.3.2.6 CT connections and transformation ratio correctionThe connections of the primary current transformers are designated as "Type 1"and "Type 2".• If the positive directions of the winding 1 and winding 2 IED currents areopposite, the CT connection type setting parameter is "Type 1". Theconnection examples of "Type 1" are as shown in Figure 219 and Figure 220.• If the positive directions of the winding 1 and winding 2 IED currents equate,the CT connection type setting parameter is "Type 2". The connectionexamples of "Type 2" are as shown in Figure 221 and Figure 222.• The default value of the CT connection type setting is "Type 1".1YHT530004D05 D Section 4Protection functions615 series 413Technical Manual