Answer / k.prakashchandra

If AVR trips UCB has to trip either for LOE(loss of excitation ) or reverse power .Leading pf indicates gen voltage lower than grid voltage . Check the measuring PTs. Is is better to synchronize manually before resorting to Auto. Check the synchroscope also

Answer / k.prakashchandra

As told by somebody , the phase sequence in the AVR should be as that of gen

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