ABB Relion 670 Series Technical Reference Manual

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ABB Relion 670 Series Technical Reference Manual Manual pdf 635 page image

17.2.6 Local human-machine interface (Local HMI)Refer to section "Local HMI" for information.17.2.7 Transformer input module (TRM)17.2.7.1 IntroductionThe transformer input module is used to galvanically separate and transform thesecondary currents and voltages generated by the measuring transformers. Themodule has twelve inputs in different combinations of currents and voltage inputs.Alternative connectors of Ring lug or Compression type can be ordered.17.2.7.2 DesignThe transformer module has 12 input transformers. There are several versions ofthe module, each with a different combination of voltage and current inputtransformers.Basic versions:• 6 current channels and 6 voltage channels• 7 current channels and 5 voltage channels• 9 current channels and 3 voltage channels• 12 current channels• 6 current channelsThe rated values and channel type, measurement or protection, of the current inputsare selected at order.Transformer input module for measuring should not be used withcurrent transformers intended for protection purposes, due tolimitations in overload characteristics.The TRM is connected to the ADM and NUM via the UBM.For configuration of the input and output signals, refer to section "Signal matrixfor analog inputs SMAI".1MRK 505 208-UEN B Section 17IED hardware629Technical reference manual