5.22.1 CB TRIP CONVERSION LOGIC DIAGRAMV03387Trip Inputs A 1R QS CB1 Trip OutputATrip Inputs B 1R QSCB1 Trip OutputBTrip Inputs C 1R QSCB1 Trip OutputCCB1Tripping Mode3 Pole11AR Force CB1 3PForce 3PTrip CB1CB1 Trip I/P 3Ph&1R QS CB1 Trip 3phTrip Inputs A 1R QS CB2 Trip OutputATrip Inputs B 1RQSCB2 Trip OutputBTrip Inputs C 1R QSCB2 Trip OutputCCB2Tripping Mode3 Pole11AR Force CB2 3PForce 3PTrip CB2CB2 Trip I/P 3Ph&1R QS CB2 Trip 3ph1 Any TripDwell100 ms111Pole Dead APole Dead BPole Dead CTrip Inputs ATrip Inputs BTrip Inputs C&&&1&R QSR QS2/3 Ph Fault3 Ph Fault≥25305315325305315328585335291485160416085305315328928938945235245255261601160216031600522527528Figure 188: Circuit Breaker Trip Conversion Logic Diagram (Module 63)5.23 MONITOR CHECKS FOR CB CLOSUREFor single-phase Autoreclose neither voltage nor synchronisation checks are needed as synchronising powershould be flowing in the two healthy phases. For three-phase Autorelcose, for the first shot (and only the first shot),you can choose to attempt reclosure without performing a synchronisation check. The setting to permitAutoreclose without checking synchronising conditions is CB SC Shot 1.Otherwise, synchronising checks on voltages, relative frequencies, and relative phase angles are needed to ensurethat sympathetic conditions exist before CB closure is attempted.The following diagrams detail the Monitor Checks for CB closure.P446SV Chapter 11 - AutorecloseP446SV-TM-EN-1 331
