Problem 3 A three-zone distance protection relay is located at busbar A as shown in Figure 4 (square). The VT ratio is
132k(V)/(220)V
and CT ratio is 1000/1. Find the impedance setting for zone 1 and zone 2 protection of the relay assuming that zone 1 covers
80%
of line section
AB
and zone 2 covers
100%
of line section
AB
plus
30%
of the shortest adjacent line. (All quantities are in p.u. on
100MVA,132kV
base) Figure 4 Circuit for Problem 3

Question

Problem 3 A three-zone distance protection relay is located at busbar A as shown in Figure 4 (square). The VT ratio is

132k(V)/(220)V

and CT ratio is 1000/1. Find the impedance setting for zone 1 and zone 2 protection of the relay assuming that zone 1 covers

80%

of line section

AB

and zone 2 covers

100%

of line section

AB

plus

30%

of the shortest adjacent line. (All quantities are in p.u. on

100MVA,132kV

base) Figure 4 Circuit for Problem 3

Accepted Answer

Expert Answer to -  Problem 3 A three-zone distance protection relay is located at busbar A as shown in Figure 4 (squar

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Solution for -  Problem 3 A three-zone distance protection relay is located at busbar A as shown in Figure 4 (squar

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This an additional answer to -  Problem 3 A three-zone distance protection relay is located at busbar A as shown in Figure 4 (squar

(Solved): Problem 3 A three-zone distance protection relay is located at busbar A as shown in Figure 4 (squar ...