What is the GMR six strands conductor with pyramid formation in terms of r of individual strand?

Two port network consist of Z11=Z22=j0?16 and Z12=Z21=j0.06 ohm. Find the new Z33 wheb Zb=0.34 ohm is connected from bus 2 to new bus 3

A three phase 60 Hz transposed transmission line has a flat horizontal spacing configuration. The line reactance is 0.486 ohm per km. The conductor geomtric mean radius is 2.0 cm. Determine the spacing D in meter.

The use of strain type insulators is made where the conductor are

What is the relay that can detect overload in the line?

What is the IEEE standard device number of Circuit breaker?

A 69kV/13.4 kV, 75 MVA transformer has 8% impedance. What is its impedance at base 100 MVA and 66 kV?

Two bus system has Z11 = j0.11565 pu, Z12=Z21=j0.04580 and Z22=j0.13893 pum If can impedance Zb=j0.4 pu is connected between buses 1 and 2. Find the new value of Z11

A 115 kV double circuit 3 phase transmission lien composed of 336.4 MCM ACSR with GMR of 0.0244 ft has a horizontal spacing of 18 ft and a conductor verticsm spacing of 9.0 ft. Calculate the GMR of the parallel lines

The percent impedance of a line is 6% at 34.5 kV and 100 MVA base. What is the ohmic impedance?

Transmission line insulators are made of

At certain location in an electric system, the available fault MVA is 400 MVA, a 15 MVA, 34.4 kV/6.24 kV, 2.5% impedance wye wye geounded transformer is installed at that location. Determine the shirt cirxuit MVA at the secondary.

The basic function of a circuit breaker is to

Which of the following bar schemes is the most expencive

The material generally used for ammour of high voltage cables is

The impedance of a line is 5% on 115 kV and 100 MVA bases. What shall be at 120 kV and 10,000 kVA bases?

For which of the following equipment current rating is not neccesary?

A 50 MVA, 33 kV/11kV, three phase wye delta connected transformer has a 3% impedance. what is the per cent impedance at 100 MVA and 34.5 kV bases?

Overhead transmissions line generally use

In transmission lines the most effective protection against lighting strikes is one of the following. Which one this?

It is computerized data gathering monitoring and switching equipment

The distribution system is 34.5 kV ungrounded, which arrester shall be installed to protect a distribution transformer

What is the IEEE standard device number for Overvoltage Relay?

What is the recommended horizontal spacing of three phase conductors for a 34.5 kV transmission line?

A device which monitor and operstes when certain level has been reached?

A single line distribution linebis installed with two No. 8 conductors spaced 15 cm. The line is 4 km long and the GMR with No 8 is 1.27 x 10^-3 m. What is the inductance with the line?

The available fault duty of a certain point of electrical system is 950 MVA at 230 kV. Thevenin's equivalent impedance is 2.63%, What is the available fault current?

Earthing is neccesary to give protection against

A 115 kV line has a horizontal configuration. The distance between adjacent conductor is 9 ft. What is the geometric mean distance of the line?

In transmission lines the cross arms are made of

For Y bus systen shown find Y22

On which of the following factors skin effect depends?

Which of the following materials is not for transmission and distribution of electrical power?

Name the effect which resulted because of the size of conductor frequency and the specific resistance of the conducting material

In a certain analyses the bases chosen are 69 kV and 100 mVA What is the impedance base?

A ciruit is disconnected by isolators when

It is a protective relay which compares the sum of incomming currents against the sum of the outgoing currentm it operates when there is unbalance?

Which of the following busbar schemes has the lowest cost?

Which of thw following type of fault that used only the equivalent positive impedance of the circuit short circuit calculation?

In both skin effect and proximity effect