Which relays are used for phase faults on long line?

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asked Mar 20, 2018 by anonymous

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For a 500 Hz frequency excitation, a 50 km long power line will be modeled as

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asked May 8, 2018 by anonymous

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asked Aug 11, 2018 by anonymous

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asked Mar 10, 2018 by anonymous

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asked Mar 10, 2018 by anonymous

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Last answer: Line voltage is voltage between two phases R &Y (415 v) while phase voltage is the voltage between one phase and a neutral B & N (240 v).

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asked Apr 29, 2018 by anonymous

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asked Mar 19, 2018 by anonymous

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asked May 12, 2018 by anonymous

Reactance relays are employed for Phase faults in :

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asked Jan 21, 2020 by Shubham

Why use phase modifiers in case of long transmission line

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How many types of types of relays are there?

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Power for lighting in passanger coach, in a long distance electric train, is provided?

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When a wave propagates on a transmission line, it suffers reflection several times at?

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asked Mar 20, 2018 by anonymous

When a transmission line is energized, the wave that propagates on it is?

Last answer: When a transmission line is energized, the wave that propagates on it is current wave and voltage wave.

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asked May 1, 2018 by anonymous

The surge impedance for over head line is taken as

The surge impedance for over head line is taken as (1) 10-20 ohms (2) 50-60 ohms (3) 100-200 ohms (4) 1000-2000 ohms

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asked Aug 12, 2018 by anonymous

For a balanced three phase star connected load for which line voltage is 230V and per phase resistance and reactance is 6 Ohm and 8 Ohm respectively. Calculate: 1) phase voltage 2) line current 3) power factor 4) total power absorbed

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asked Apr 26, 2018 by anonymous

Regulating-transformers are used in power systems for control of

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asked Apr 26, 2018 by anonymous

Surge absorbers are used for protection against

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asked Apr 28, 2018 by anonymous

The sending end and receiving end voltages of a three-phase transmission line are 10 kV/ph and 9.5 kV/ph,

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Last answer: Vscos¢s-Vrcos¢r=IR

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asked Mar 21, 2018 by anonymous

A cumulatively compounded long shunt generator when operating as a motor would be?

Last answer: A cumulatively compounded long shunt generator when operating as a motor would be differentially compounded long shunt.

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asked May 8, 2018 by anonymous

As per Electricity Act, ____________means any line which is used for carrying electricity for any purpose.

As per Electricity Act, ____________means any line which is used for carrying electricity for any purpose. (A) Electric line (B) Transmission line (C) All of the above (D) None of the above

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asked May 8, 2018 by anonymous

In a transmission line if booster transformers are to be used, preferred location will be

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Last answer: In a transmission line if booster transformers are to be used, preferred location will be At the intermediate point

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asked Apr 29, 2018 by anonymous

A lightening arrester connected between the line and earth in a power system protects the terminal equipment

A lightening arrester connected between the line and earth in a power system (1) protects the terminal equipment against travelling surges (2) protects the transmission line against direct lightening strokes (3) suppresses high frequency oscillations in the line (4) reflects back the travelling wave approaching it

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asked Apr 26, 2018 by anonymous

lf a travelling-wave travelling along a loss-less overhead line does not result in any reflection after it has

lf a travelling-wave travelling along a loss-less overhead line does not result in any reflection after it has reached the far end, then the far end of the line is

Last answer: lf a travelling-wave travelling along a loss-less overhead line does not result in any reflection after it has reached the far end, then the far end of the line is terminated into a resistance equal to surge impedance of the line

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asked Apr 26, 2018 by anonymous

Transmission efficiency of a transmission line increases with the

Last answer: Transmission efficiency of a transmission line increases with the increase in power factor and voltage

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asked Mar 20, 2018 by anonymous

The inductive interference between power and communication line can be minimized by?

Last answer: The inductive interference between power and communication line can be minimized by transposition of the power line, transposition of the communication line.

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asked Mar 20, 2018 by anonymous

The interaction between a transmission line and communication line is minimized by?

Last answer: The interaction between a transmission line and communication line is minimized by transposing transmission as well as communication lines, increasing the height of the transmission line tower, increasing the distance between the two lines.

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anonymous · Answer 1 · 2018-03-20T02:30:31+0000

answered Mar 20, 2018 by anonymous

Impedance relays are used for phase faults on long line.

Which relays are used for phase faults on long line?

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