ABB RET670 Product Manual

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ABB RET670 Product Manual Manual pdf 20 page image

Single command, 16 signalsThe IEDs can receive commands either from asubstation automation system or from the localHMI. The command function block has outputs thatcan be used, for example, to control high voltageapparatuses or for other user defined functionality.10. LogicTripping logic SMPPTRC (94)A function block for protection tripping is providedfor each circuit breaker involved in the tripping ofthe fault. It provides pulse prolongation to ensure atrip pulse of sufficient length, as well as allfunctionality necessary for correct co-operation withautoreclosing functions.The trip function block includes functionality forevolving faults and breaker lock-out.Fixed signal function blockThe Fixed signals function (FXDSIGN) generates anumber of pre-set (fixed) signals that can be used inthe configuration of an IED, either for forcing theunused inputs in other function blocks to a certainlevel/value, or for creating certain logic.11. MonitoringMeasurements CVMMXN, CMMXU, VNMMXU,VMMXU, CMSQI, VMSQIThe measurement functions are used to get on-lineinformation from the IED. These service valuesmake it possible to display on-line information onthe local HMI and on the Substation automationsystem about:• measured voltages, currents, frequency,active, reactive and apparent power and powerfactor• primary and secondary phasors• positive, negative and zero sequence currentsand voltages• mA, input currents• pulse countersSupervision of mA input signalsThe main purpose of the function is to measure andprocess signals from different measuringtransducers. Many devices used in process controlrepresent various parameters such as frequency,temperature and DC battery voltage as low currentvalues, usually in the range 4-20 mA or 0-20 mA.Alarm limits can be set and used as triggers, e.g. togenerate trip or alarm signals.The function requires that the IED is equipped withthe mA input module.Event counter CNTGGIOEvent counter (CNTGGIO) has six counters whichare used for storing the number of times eachcounter input has been activated.Disturbance report DRPRDREComplete and reliable information aboutdisturbances in the primary and/or in the secondarysystem together with continuous event-logging isaccomplished by the disturbance reportfunctionality.Disturbance report DRPRDRE, always included inthe IED, acquires sampled data of all selectedanalog input and binary signals connected to thefunction block with a, maximum of 40 analog and96 binary signals.The Disturbance report functionality is a commonname for several functions:• Sequential of events• Indications• Event recorder• Trip value recorder• Disturbance recorderThe Disturbance report function is characterized bygreat flexibility regarding configuration, initiatingconditions, recording times, and large storagecapacity.A disturbance is defined as an activation of an inputto the AxRADR or BxRBDR function blocks, whichare set to trigger the disturbance recorder. AllTransformer protection RET670 ANSI 1MRK 504 118-BUS APre-configuredProduct version: 1.220 ABB