In a 132 kV system, the series inductance up to the point of circuit breaker location is 50 mH. The shunt capacitance at the circuit breaker terminal is 0.05. The critical value of resistance in ohms required to be connected across the circuit breaker contacts which will give no transient oscillation is __________.

A three-phase 33kV oil circuit breaker is rated 1200A, 2000MVA 3s. The symmetrical breaking current is

Keeping in view the cost and overall effectiveness, the following circuit breaker is best suited for capacitor bank switching.

The interrupting time of a circuit breaker is the period between the instant of

Three sections of a feeder are provided with circuit breakers CB1, CB2, CB3, CB4, CB5 and CB6. For a fault F as indicated in fig.

Determine the required MVA rating of the circuit breaker CB for the system shown in fig. Consider the grid as infinite bus. Choose 6 MVA as base.  

Transformer: 3-phase, 33/11 kV, 6 MVA, 0.01+j0.08p.u. Impedance

Load: 3-phase, 11 kV, 5800 MVA, 0.8 lag, j0.2p.u. Impedance

Impedance of each feeder 9+j18 Ω

Resistance switching is normally employed in

If the inductance and capacitance of a power system network upto a circuit breaker location are 1H and 0.01μF respectively, the value of the shunt resistor across the circuit breaker, required for critical damping of the re-striking voltage is _________________

In a 4 bus system the circuit breakers and the various zones of protection are shown in figure. If the circuit breakers E, F and G trip, the location of the fault is on ___________