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The normal voltage for dielectric heating is

Recent questions and answers in High voltage engineering

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What is the difference between line and phase voltage?

answered Aug 15, 2018 in High voltage engineering
1 answer 40 views

What does BIL stand for in electrical terms?

answered Aug 4, 2018 in High voltage engineering
1 answer 106 views

Why does increase in current mean a decrease in voltage?

answered Jul 31, 2018 in High voltage engineering
1 answer 32 views

Why high voltage can reduce power loss?

answered Jul 31, 2018 in High voltage engineering
0 answers 10 views

The breakeven distance for HVDC transmission is (A) 100 kM (B) 250 kM (C) 500 kM – 800 kM (D) Above 1000 kM 

asked Jun 4, 2018 in High voltage engineering
1 answer 78 views

What is the definition of extra low voltage?

answered May 27, 2018 in High voltage engineering
1 answer 13 views

Which of the following is TRUE with respect to HVDC transmission line? (A) For a short distance it is economical over HVAC. (B) In HVDC system, harmonics are not generated. (C) Use of HVDC can improve system stability. (D) Less and cheap terminal, equipments are required in HVDC.

answered May 13, 2018 in High voltage engineering
1 answer 36 views

A Unified Power Flow Controller (FACTS controller) is a voltage source converter based (A) Inter-phase power controller (B) Static Compensator (C) Combination of series and shunt compensators (D) Solid-state series compensator

answered Apr 28, 2018 in High voltage engineering
1 answer 36 views

In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals

answered Apr 28, 2018 in High voltage engineering
0 answers 26 views

In the case of second order differential equation if the damping ratio is unity, then the poles are  A) Equal, positive and real B) Imaginary and complex conjugate C) Equal, negative and real D) None of the above

asked Apr 9, 2018 in High voltage engineering
0 answers 7 views

The effect of corona in high voltage a.c. transmission line is  A) Increased energy loss in the transmission line B) Increased line reactance C) Increased line to line capacitance D) All of the above 

asked Apr 9, 2018 in High voltage engineering
0 answers 10 views

A bus coupler circuit breaker is utilized in a sub-station for  A) Connecting the transmission line with the bus-bar B) Connecting two power transformers in parallel C) Connecting the bus-bar with ground D) Connecting main and transfer buses in the sub-station

asked Apr 9, 2018 in High voltage engineering
0 answers 13 views

When the communication line run parallel to the power lines in close proximity  P. The electromagnetic effect produces current due to induction resulting its superposition on the speech signal of the communication line causing distortion  Q. The electrostatic effect raises the potential of the communication circuit as a whole and thereby posing a threat of damage to the ... lines  Which of the following combinations is valid?  A) R only B) P, Q & R C) P & Q only D) P & R only

asked Apr 9, 2018 in High voltage engineering
0 answers 8 views

Due to skin effect  A) Portion of conductor near the outer surface carries less current and the inner core of the conductor carries more current B) Portion of conductor near the outer surface carries more current and the inner core of the conductor carries less current C) Current density over the entire cross section of the conductor is uniform D) Current density near the center of the conductor is maximum and near the surface of the conductor zero

asked Apr 9, 2018 in High voltage engineering
0 answers 10 views

Back-to back connection is used in HVDC system to  A) Provide synchronous tie between two systems B) Provide bulk power transmission over long distance C) Provide asynchronous tie between two systems D) Reduce the line voltage drop and the transmission loss

asked Apr 9, 2018 in High voltage engineering
0 answers 14 views

What are the losses in a transmission line?

asked Mar 10, 2018 in High voltage engineering
0 answers 35 views

How do you fix voltage drop?

asked Mar 10, 2018 in High voltage engineering
0 answers 18 views

Is more power dissipated in series or parallel?

asked Mar 10, 2018 in High voltage engineering
0 answers 20 views

What is meant by flash over voltage?

asked Mar 10, 2018 in High voltage engineering
0 answers 17 views

Is 50hz or 60hz better?

asked Mar 10, 2018 in High voltage engineering
0 answers 16 views

What is dielectric breakdown strength?

asked Mar 10, 2018 in High voltage engineering
0 answers 33 views

How can power loss be reduced?

asked Mar 10, 2018 in High voltage engineering
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How do you calculate power loss?

asked Mar 10, 2018 in High voltage engineering
0 answers 25 views

What is the lowest acceptable insulation resistance for a cable?

asked Mar 10, 2018 in High voltage engineering
0 answers 22 views

What is the purpose of using a Megger?

asked Mar 10, 2018 in High voltage engineering
0 answers 16 views

Why high voltage test is done?

asked Mar 10, 2018 in High voltage engineering
0 answers 20 views

What is dielectric withstand voltage?

asked Mar 10, 2018 in High voltage engineering
0 answers 24 views

What do you mean by insulation coordination?

asked Mar 10, 2018 in High voltage engineering
0 answers 31 views

What is a safe distance from power lines?

asked Mar 10, 2018 in High voltage engineering
0 answers 12 views

What is a Ductor tester used for?

asked Mar 10, 2018 in High voltage engineering
0 answers 17 views

What is an insulation resistance test?

asked Mar 10, 2018 in High voltage engineering
0 answers 22 views

What is impulse voltage of transformer?

asked Mar 10, 2018 in High voltage engineering
0 answers 20 views

What is double or reinforced insulation?

asked Mar 10, 2018 in High voltage engineering
0 answers 10 views

What is a switching impulse?

asked Mar 10, 2018 in High voltage engineering
0 answers 26 views

What is Extra High Voltage?

asked Mar 10, 2018 in High voltage engineering
0 answers 61 views

What is the difference between a line voltage and low voltage control system?

asked Mar 10, 2018 in High voltage engineering
0 answers 13 views

What is basic insulation level?

asked Mar 10, 2018 in High voltage engineering
0 answers 324 views

What are the advantages of high voltage transmission?

asked Mar 10, 2018 in High voltage engineering
0 answers 17 views

What is a high voltage test?

asked Mar 10, 2018 in High voltage engineering
0 answers 20 views

What is considered low voltage and high voltage?

asked Mar 10, 2018 in High voltage engineering
1 answer 74 views

What is the use of lightning arrester?

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