10.12 Repeat Example 10.4 for the following system data. Coordinate the relays for the

maximum fault currents.

Bus

1

2

3

Breaker

B1

B2

B3

MVA

9.0

9.0

9.0

Maximum Load

Lagging p.f.

0.95

0.95

0.95

Breaker Operating Time

5 cycles

5 cycles

5 cycles

Symmetrical Fault Current

Maximum A

5000

3000

2000

CT Ratio

600:5

400:5

200:5

Minimum A

3750

2250

1500

Relay

CO-8

CO-8

CO-8