A 50 Hz, 11 kV, 3 phase alternator with earthed neutral having a react – McqOptions

MCQOPTIONS

1.	A 50 Hz, 11 kV, 3 phase alternator with earthed neutral having a reactance of 3 ohms per phase and is connected to a bus bar through a circuit breaker, if the distributed capacitance upto CB between the phase and neutral is 0.01 F.What is the frequency of oscillations?
A.	10000 Hz
B.	12500 Hz
C.	12628 Hz
D.	13265 Hz
Answer» D. 13265 Hz

Discussion

No Comment Found

Related MCQs

A 50 Hz, 11 kV, 3 phase alternator with earthed neutral having a reactance of 3 ohms per phase and is connected to a bus bar through a circuit breaker, if the distributed capacitance upto CB between the phase and neutral is 0.01 F.What is the frequency of oscillations?
In a short circuit test on a circuit breaker, the following readings were obtained on single frequency transients
A 50 Hz, 11 kV, 3 phase alternator with earthed neutral having a reactance of 3 ohms per phase and is connected to a bus bar through a circuit breaker, if the distributed capacitance upto CB between the phase and neutral is 0.01 F.What is the peak re striking voltage?
A 50 Hz 3 phase synchronous generator has inductance per phase of 15mH. The capacitance of generator and the circuit breaker is 0.002 F. What is the natural frequency of oscillation?
For the following figure shows a CB circuit with L - C introducing a damping circuit. For the critical damping what is the value of r?
What is the normal pressure at which the SF gas is maintained in the closed position of the breaker?
What is the most important property which makes the SF very efficient medium for circuit breaking?
SF gas is imported in _____________.
Assertion (A): In comparison to making capacity of a circuit breaker its breaking capacity is normally higher.Reason (R): The breaking capacity of a CB is expressed as 3 * VI * 10 MVA
SF is which type of gas?