1 Study the burden effect on the performance of CT and measure ratio error.
2 Find out the sequence components of currents in three 1-Phase transformers and 3-Phase
transformer and compare their results.
3 (i) Study over current relay.
(ii) Draw the current-time characteristic of an over current relay for TMS=1 & 0.5 and
PSM=1.25 & 1.0.
4 (i) Study percentage bias differential relay.
(ii) Plot the characteristics of a percentage bias differential relay for 20%, 30% and 40%
biasing.
5 Study gas actuated Buchholz relay.
6 Study under frequency relay and check it’s setting experimentally.
7 Design a HV transmission line.
8 Study a typical grid substation.
9 Study earthing of power station, substation and building