HQ Technology

Insulator. What are the insulators used in over head lines? What is switchgear? Why is busbar sectionalized? How many types of system loss in electrical systems and what are they?       Insulator. What are the insulators used in over head lines? Answer: Insulators are: 1) Pin type insulator 2) Suspension type insulator. 3) Strain type insulator. 4) Shackle type insulator. 5) Post type insulator. 6) Stay or guy type insulators.   2. Why are insulators used in overhead lines?  Write the important properties of insulators. Answer: No leakage current can go from the support to the earth because of the use of insulators. That is why insulators play an important role in transmission and distribution lines.   3. What qualities should the insulator have? Answer: An insulator should have the following qualities 1. Should be mechanically strong and robust. 2. High electrical resistance should be achieved. 3. Relative permittivity should be high. 4. The ratio of punc...

Insulator. What are the insulators used in over head lines? What is switchgear? Why is busbar sectionalized? How many types of system loss in electrical systems and what are they? Insulator. What are the insulators used in over head lines? Answer: Insulators are: 1) Pin type insulator 2) Suspension type insulator. 3) Strain type insulator. 4) Shackle type insulator. 5) Post type insulator. 6) Stay or guy type insulators. 2. Why are insulators used in overhead lines?  Write the important properties of insulators. Answer: No leakage current can go from the support to the earth because of the use of insulators. That is why insulators play an important role in transmission and distribution lines. 3. What qualities should the insulator have? Answer: An insulator should have the following qualities 1. Should be mechanically strong and robust. 2. High electrical resistance should be achieved. 3. Relative permittivity should be high. 4. The ratio of puncture strength and spark over voltag...

 What is Corona? How is corona organized? What are the factors influencing corona? What is the effect of corona?   What is Corona? Ans: When the spacing of two conductors is kept greater than the diameter, they are gradually increased by applying AC voltage across them. Then at a certain stage the air on the four sides of the conductor is ionized and the insulation trace of the air is broken. In this condition, light dull violet rays appear in and around the conductor, hissing sound and the formation of weight gas is called corona. How is corona organized? is done Answer: When ac supply is applied across two conductors i.e. ac supply is gradually increased, there comes a stage when the air around the conductor gets ionized and the insulation strength of the air breaks. The result is a hissing sound around the conductor and a purple glow discharge is seen. This results in the formation of weight gases.   Ways to reduce the corona effect. Answer: Corona effect can be reduc...

 What is Corona? How is corona organized? What are the factors influencing corona? What is the effect of corona? What is Corona? Ans: When the spacing of two conductors is kept greater than the diameter, they are gradually increased by applying AC voltage across them. Then at a certain stage the air on the four sides of the conductor is ionized and the insulation trace of the air is broken. In this condition, light dull violet rays appear in and around the conductor, hissing sound and the formation of weight gas is called corona. How is corona organized? is done Answer: When ac supply is applied across two conductors i.e. ac supply is gradually increased, there comes a stage when the air around the conductor gets ionized and the insulation strength of the air breaks. The result is a hissing sound around the conductor and a purple glow discharge is seen. This results in the formation of weight gases. Ways to reduce the corona effect. Answer: Corona effect can be reduced in the foll...

Describe the types of transport lines:         Describe the types of transmission lines: Transmission lines are divided into three categories on the basis of length and operating voltage i) Short length transmission lines:- When the length of a transmission line is below 80km and the transmission voltage is below 20 kv, it is called a short length transmission line.ii) Medium Transmission Line: When the length of the transmission line is between 80 – 200km and the transmission voltage is between 20 – 100 kv, it is called medium transmission line. iii) Long transmission line: When the length of transmission line is above 200 km and the transmission voltage is above 100 kv, it is called long transmission line. Why is transposition of transport lines? Answer: Due to transposition, the average inductance capacitance of each line is equal. Show the resulting voltage regulation and transport efficiency diagram. is relatively advanced.   What is the Ferranti effect? A...

Describe the types of transport lines: Describe the types of transmission lines: Transmission lines are divided into three categories on the basis of length and operating voltage i) Short length transmission lines:- When the length of a transmission line is below 80km and the transmission voltage is below 20 kv, it is called a short length transmission line.ii) Medium Transmission Line: When the length of the transmission line is between 80 – 200km and the transmission voltage is between 20 – 100 kv, it is called medium transmission line. iii) Long transmission line: When the length of transmission line is above 200 km and the transmission voltage is above 100 kv, it is called long transmission line. Why is transposition of transport lines? Answer: Due to transposition, the average inductance capacitance of each line is equal. Show the resulting voltage regulation and transport efficiency diagram. is relatively advanced. What is the Ferranti effect? Ans: In medium and long transmissio...

    Definition and Identity: Alternator is a machine or electrical device that produces voltage of varying quality. Both D.C generator and Alternator produce alternating voltage within them. D, C In generator, unidirectional voltage is brought out with the help of commutator and brush, but in alternator, alternating voltage is brought out with the help of slipring. As in D, C Generator, Armature is rotated by keeping the Field fixed, in Alternator just opposite, the Armature is kept fixed by rotating the Field.This method is used in almost all alternators to get several benefits. The direction and speed of this rotation must be kept at a predetermined decision so that the frequency produced is the same everywhere. This frequency is directly dependent on the rotation and the phase sequence depends on the direction of rotation. It is also called Synchronouse generator as it has to be kept at a certain speed all the time. (adsbygoogle = window.adsbygoogle |Operation: Alternator o...

  Definition and Identity: Alternator is a machine or electrical device that produces voltage of varying quality. Both D.C generator and Alternator produce alternating voltage within them. D, C In generator, unidirectional voltage is brought out with the help of commutator and brush, but in alternator, alternating voltage is brought out with the help of slipring. As in D, C Generator, Armature is rotated by keeping the Field fixed, in Alternator just opposite, the Armature is kept fixed by rotating the Field.This method is used in almost all alternators to get several benefits. The direction and speed of this rotation must be kept at a predetermined decision so that the frequency produced is the same everywhere. This frequency is directly dependent on the rotation and the phase sequence depends on the direction of rotation. It is also called Synchronouse generator as it has to be kept at a certain speed all the time. (adsbygoogle = window.adsbygoogle |Operation: Alternator opera...

What is a Ferrel Cage Induction Motor? Write the use of its advantages and disadvantages? Mention the requirement of motor starter     Write the use of fuerl cage induction motor and its advantages and disadvantages? “Fourel Cage Induction Motor: The rotor of this motor is made of high quality laminated steel core. It is firmly connected to the motor shaft with the help of necessary keys. This core has longitudinal grooves parallel to the shaft.Thick copper bars are placed in these grooves and both ends of the bars are short-circuited by copper rings. It looks a lot like a wooden cat cage. Hence its name squirrel cage induction motor.   Advantages : (a) Its structure is very simple and robust. (b) Its material cost is less than other motors. (c) Repair and maintenance cost of a motor is very low as it lasts for a long time. (d) Speed ​​of motor remains almost same at different loads. (e) The efficiency/efficiency of the motor is high. (f) Good running performance....

What is a Ferrel Cage Induction Motor? Write the use of its advantages and disadvantages? Mention the requirement of motor starter Write the use of fuerl cage induction motor and its advantages and disadvantages? "Fourel Cage Induction Motor: The rotor of this motor is made of high quality laminated steel core. It is firmly connected to the motor shaft with the help of necessary keys. This core has longitudinal grooves parallel to the shaft.Thick copper bars are placed in these grooves and both ends of the bars are short-circuited by copper rings. It looks a lot like a wooden cat cage. Hence its name squirrel cage induction motor. Advantages : (a) Its structure is very simple and robust. (b) Its material cost is less than other motors. (c) Repair and maintenance cost of a motor is very low as it lasts for a long time. (d) Speed ​​of motor remains almost same at different loads. (e) The efficiency/efficiency of the motor is high. (f) Good running performance. Disadvantages : (...

  What is synchronous motor? What is the method of starting synchronous motor? Write the characteristics of synchronous motor?     What is synchronous motor? What is the method of starting synchronous motor? Synchronous Motor: Synchronous motor is a motor that rotates at a fixed speed from No Load to Full Load, i.e. it rotates all 120. time at synchronous speed (Ns p ). The speed of rotation of this motor does not change with load change like other motors, but its speed changes with change in number of poles or supply frequency. Its speed is inversely proportional to the number of poles, and proportional to the frequency.   Synchronous motor starting method: 1. With the help of DC Motor. 2. With the help of Pony Motor. 3. With self-starting synchronous motor. 4. With the help of synchronous induction motor. 5. With the help of Exciter.     Write the characteristics of synchronous motor? 1. It always rotates at the same speed in No Load and Full Load con...