OCBk: Selection of action to be taken in case any of the three phase currents on theHV-side has exceeded Iblock.MFPosDiffBk: Selection of action to be taken in case the tap difference between afollower and the master is greater than MFPosDiffLim.OVPartBk: Selection of action to be taken in case the busbar voltage UB exceedsUmax.RevActPartBk: Selection of action to be taken in case Reverse Action has beenactivated.TapChgBk: Selection of action to be taken in case a Tap Changer Error has beenidentified.TapPosBk: Selection of action to be taken in case of Tap Position Error, or if the tapchanger has reached an end position.UVBk: Selection of action to be taken in case the busbar voltage UB falls belowUblock.UVPartBk: Selection of action to be taken in case the busbar voltage UB is betweenUblock and Umin.12.5.2.2 TR1ATCC or TR8ATCC Setting group SEMOD171501-22 v8GeneralOperation: Switching automatic voltage control for tap changer, TR1ATCC forsingle control and TR8ATCC for parallel control function On/Off.I1Base: Base current in primary Ampere for the HV-side of the transformer.I2Base: Base current in primary Ampere for the LV-side of the transformer.UBase: Base voltage in primary kV for the LV-side of the transformer.MeasMode: Selection of single phase, or phase-phase, or positive sequencequantity to be used for voltage and current measurement on the LV-side. Theinvolved phases are also selected. Thus, single phase as well as phase-phase orthree-phase feeding on the LV-side is possible but it is commonly selected forcurrent and voltage.Q1, Q2 and Q3: Mvar value of a capacitor bank or reactor that is connectedbetween the power transformer and the CT, such that the current of the capacitorbank (reactor) needs to be compensated for in the calculation of circulatingcurrents. There are three independent settings Q1, Q2 and Q3 in order to makepossible switching of three steps in a capacitor bank in one bay.Section 12 1MRK 506 375-UEN AControl322 Railway application RER670 2.2 IECApplication manual
