Determine the time of operation of a relay of rating 5 A, 2.2s IDMT and having a relay setting of 125%, TMS = 0.6. It is connected to the supply circuit through a CT 400 : 5 ratio. The fault current is 4000 A.
|
PSM |
2 |
5 |
8 |
10 |
|
Time |
10 |
8 |
3.2 |
2.5 |
1
1.89 s
2
1.87 s
3
1.93 s
4
1.92 s