Channel ID text Level trigger mode22 INRPHAR1 - blk2h Level trigger off23 T1PTTR1 - operate Level trigger off24 ARCSARC1 - ARC flt det Level trigger offARCSARC2 - ARC flt detARCSARC3 - ARC flt det25 ARCSARC1 - operate Positive or Rising26 ARCSARC2 - operate Positive or Rising27 ARCSARC3 - operate Positive or Rising28 DARREC1 - inpro Level trigger off29 DARREC1 - close CB Level trigger off30 DARREC1 - unsuc recl Level trigger off31 X120BI1 - ext OC blocking Level trigger off32 X120BI2 - CB closed Level trigger off33 X120BI3 - CB opened Level trigger off3.5.3 Functional diagramsThe functional diagrams describe the default input, output, alarm LED and function-to-function connections. The default connections can be viewed and changed withPCM600 according to the application requirements.The analog channels have fixed connections to the different function blocks inside theIED’s standard configuration. However, the 12 analog channels available for thedisturbance recorder function are freely selectable as a part of the disturbancerecorder’s parameter settings.The phase currents to the IED are fed from a current transformer. The residual currentto the IED is fed from either residually connected CTs, an external core balance CT,neutral CT or internally calculated.The IED offers six different settings groups which can be set based on individualneeds. Each group can be activated or deactivated using the setting group settingsavailable in the IED.Depending on the communication protocol the required function block needs to beinstantiated in the configuration.3.5.3.1 Functional diagrams for protectionThe functional diagrams describe the IEDs protection functionality in detail andaccording to the factory set default connections.Four non-directional overcurrent stages are offered for overcurrent and short-circuitprotection. Three-phase non-directional overcurrent protection, instantaneous stage,PHIPTOC1 can be blocked by energizing the binary input X120:BI1.1MRS756378 S Section 3REF615 standard configurationsREF615 101Application Manual