What are the different substation components

What are the different substation components
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Circuit Breakers, Disconnecting switches, Grounding switches, Current Transformers, Potential Transformers or Capacitor voltage Transformers, Line Traps, Lightning Arrestors, Power Transformers, Shunt Reactors, Current limiting reactors, Station Buses and Insulators, Grounding system, Series capacitors and shunt capacitors.
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Related questions

What are different Bus bar materials used in Substation?

Description : What are different Bus bar materials used in Substation?

Last Answer : Busbars are generally made of copper and Aluminum. Aluminim has the advantage of one third the weight of the copper and also Aluminum requires less maintenance and proper use of alloys provide necessary rigidity required for bus material. Aluminum is used widely in EHV and HV stations

What are the different electrical clearances in Substation?

Description : What are the different electrical clearances in Substation?

Last Answer : Ground Clearance: This is the minimum distance between any live conductor and the earth or ground. Phase Clearance: It is the clearance between the different phases in a circuit or same phases in different ... The limits of work section may be ground or the platform on which the person is working.

What is the first equipment of the substation connected to the incoming transmission line?

Description : What is the first equipment of the substation connected to the incoming transmission line?

Last Answer : Lightning arrestor is the first equipment of the substation connecting the incoming transmission lines. It protects other substation equipment from lightning and switching surges by suppressing them to ... between both the ends of major equipment such as power transformers for protection.

State the condition for selecting site for distribution substation.

Description : State the condition for selecting site for distribution substation. 

Last Answer : Following condition should be considered while selecting site for distribution sub-station:-  1. Near load center :  Sub-station should be located near load center to reduce cost of Transmission and ... free from earthquake :  To avoid damage to sub-station area should be free earth quake. 

State the classification of distribution substation.

Description : State the classification of distribution substation. 

Last Answer : The classification of distribution substation. 1. Pole mounted distribution substation 2. Plinth mounted distribution substation 3. Compact/prefabricated distribution substation 4. ... Indoor distribution substation 6. Outdoor distribution substation 7. Mobile distribution substation 

What is the purpose of auxiliary controller in substation?

Description : What is the purpose of auxiliary controller in substation?

Last Answer : The systems of substation auxiliaries ensure operation of substations providing internal consumers of substations with operating direct and alternating currents. Any breakdown (loss) of auxiliary systems ... whole substation, as well as serious problems during its subsequent putting into operation.

Classification of Substation According to Method of Construction

Description : Classification of Substation According to Method of Construction

Last Answer : Classification of Substation According to Method of Construction:- 1. Indoor Substation 2. Outdoor Substation 3. Gas insulated Substation 4. Underground Substation 5. Pole mounted substation 6. Plinth Substation 7. Compact/prefabricated substation

Isolator in substation is open under ___________ condition?

Description : Isolator in substation is open under ___________ condition?  (A) No load (B) Short circuit (C) Full load (D) None of the above

Last Answer : no load

What does a substation do?

Description : What does a substation do?

Last Answer : At  the  substations,  power  is  boosted  up  for  long  distance  transmission.

What are different types of busbar arrangement Schemes in Substations?

Description : What are different types of busbar arrangement Schemes in Substations?

Last Answer : Different switching schemes or busbar arrangement scheme employed in switch-yard are: Single Bus Scheme Double bus single breaker scheme Main and Transfer busbar scheme Double bus single breaker scheme Breaker and half scheme Ring main bus scheme

What are different insulators employed in substations?

Description : What are different insulators employed in substations?

Last Answer : Some of the insulators employed in substations are: Pin insulators Post insulators Strain insulators Suspension insulators Hallow apparatus insulators Dead-end insulators Solid core insulators

Why EHV busbars are hallowed and circular?

Description : Why EHV busbars are hallowed and circular?

Last Answer : Answer: To avoid corona effect

Factors on which material of station busbar depends?

Description : Factors on which material of station busbar depends?

Last Answer : Some of the factors on which station busbar depends are: Current Carrying capacity Short Circuit Stresses Establishing minimum electrical clearances

For distribution network which type of Switching scheme is employed?

Description : For distribution network which type of Switching scheme is employed?

Last Answer : For distribution network Ring Main busbar scheme is employed. It has the provision that if power interruption occurs to one bus section due to maintenance or fault, power can be fed the bus from other side of the power system.

Which type of bus arrangement is costlier and more reliable?

Description : Which type of bus arrangement is costlier and more reliable?

Last Answer : One and half breaker scheme is most reliable and costlier scheme. In one and half breaker scheme 3 circuit breakers are provided for 2 bus-bars. Hence the name is coined as One and half breaker scheme

What is the neutral point earthing and its advantages?

Description : What is the neutral point earthing and its advantages?

Last Answer : In substation all the neutrals of rotating machines, transformers, busbars and other equipment are connected to ground. Some of the advantages are: Earth fault protection is based on the method of ... , grounding of neutral helps to reduce the over-voltages which occur on the one healthy phases

What is the significance of Corona rings in substations?

Description : What is the significance of Corona rings in substations?

Last Answer : It is observed that corona discharge occurs mostly at sharp corners, edges near the conductor fixing points. Corona rings also called grading rings are hallow metallic rings having large diameter ... is reduced to much lower value Corona discharge is eliminated Dust deposition is also minimized

What are the disadvantages of corona?

Description : What are the disadvantages of corona?

Last Answer : Some of the disadvantages of corona are: Corona causes power loss Corona causes unacceptable noise Corona cause radio interference

What is Basic Impulse Level (BIL)?

Description : What is Basic Impulse Level (BIL)?

Last Answer : Basic Impulse Level (BIL) refer to the peak value of lightning impuse voltage withstand capability of the equipment

What is creepage distance?

Description : What is creepage distance?

Last Answer : Creepage distance is the shortest distance between two conducting points along the surface of the insulating material.

What are different insulators used in substation

Description : What are different insulators used in substation

Last Answer : Different Insulators: Over head electrical conductors used for transmitting electric power is mostly bare and not covered with any insulation medium. The bare line conductors are ... Post insulators for support Stray arm insulators Shaft insulators Sectionalising insulators Connecting rod insulators

Some important components/equipments in substation

Description : Distributed under Creative Commons Attribution-ShareAlike - CC BY-SA.

Last Answer : Some important components/equipments in substation  As told earlier, the function of a substation is to receive power at some voltage through incoming lines and transmit it at some other voltage through ... range ammeter to indicate the line current. Version 2 EE IIT, Kharagpur 

Which of the device is employed in substation to limit the short circuit current in the power system: a) Shunt condenser b) Reactor c) Series capacitor d) Shunt capacitor

Description : Which of the device is employed in substation to limit the short circuit current in the power system: a) Shunt condenser b) Reactor c) Series capacitor d) Shunt capacitor

Last Answer : Ans: B

In order to improve the power factor ___ device is employed in the substation a) Synchronous condenser b) Synchronous reactor c) Series Capacitors d) None of the above

Description : In order to improve the power factor ___ device is employed in the substation a) Synchronous condenser b) Synchronous reactor c) Series Capacitors d) None of the above

Last Answer : Ans: A

Stones are provided in the substation to: a) To avoid fire accident by draining oil from transformer if leaks b) To avoid growing of weeds and plants c) To provide insulation d) All the above

Description : Stones are provided in the substation to: a) To avoid fire accident by draining oil from transformer if leaks b) To avoid growing of weeds and plants c) To provide insulation d) All the above

Last Answer : Ans: D

Locations where Gas Insulated Substation is preferred

Description : Locations where Gas Insulated Substation is preferred

Last Answer : Gas Insulated Substations are preferred in the places where land requirement for the substation is difficult such as in populated areas and highly polluted areas where outdoor switchyard is not ... pollution and saline environment. Under such case indoor GIS substation is very much helpful.

In a substation the following equipment is not installed (a) exciters (b) series capacitors (c) shunt reactors (d) voltatre transformers

Description : In a substation the following equipment is not installed (a) exciters (b) series capacitors (c) shunt reactors (d) voltatre transformers

Last Answer : (a) exciters

Draw a block diagram of WPP substation. State function of each block.

Description : Draw a block diagram of WPP substation. State function of each block.

Last Answer : Block Diagram of WPP Substation: OR Wind Turbine : Converts wind power to rotational mechanical energy Gear Box: Transfer low speed to high. Generator: Converts rotational ... to DC and vice-versa of correct frequency. Transformer: Step up the voltage to grid level.

State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for : (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line

Description : State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for : (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line

Last Answer : Significance of earthing:  * Earthing means connecting the body of the electrical equipment (it means the part which does not carries current under normal condition) to the earth. For example electrical equipment' ... surrounded by charcoal and salt.  the values of earth resistances for: 

Write down the circuit breaker with their rating used in traction substation. Explain any one.

Description : Write down the circuit breaker with their rating used in traction substation. Explain any one.

Last Answer : Circuit Breaker With Their Rating Used in Traction Substation: Rated capacity of a circuit breaker is 750Amps at 25 kV, 500MVA. Its overall tripping time is 0.14 seconds composed of 0.04 ... but in case of traction substation application, mostly Minimum Oil Circuit Breaker (MOCB) is preferred.

Name the different components of nuclear reactor?

Description : Name the different components of nuclear reactor?

Last Answer : 1. Nuclear fuel 2. Moderator 3. Control rods 4. Reflectors 5. Reactor vessel 6. Biological shielding 7. Coolant

If the motor shown in the illustration will not start when 'Q' is depressed, which of the listed components should be checked FIRST? EL-0017 A. Fuses 'F-1' and 'F-2'. B. Operating coil 'C'. C. Contacts 'H-1', 'H-2', and 'H-3'. D. Contact 'H-4'.

Description : If the motor shown in the illustration will not start when 'Q' is depressed, which of the listed components should be checked FIRST? EL-0017 A. Fuses 'F-1' and 'F-2'. B. Operating coil 'C'. C. Contacts 'H-1', 'H-2', and 'H-3'. D. Contact 'H-4'.

Last Answer : Answer: A

Peripheral components for the operation of the astern valve position amplifier circuit shown in the illustration are _____________. EL-0099 A. resistors B. operated on +28 volts D.C. C. located on a separate circuit card D. all of the above

Description : Peripheral components for the operation of the astern valve position amplifier circuit shown in the illustration are _____________. EL-0099 A. resistors B. operated on +28 volts D.C. C. located on a separate circuit card D. all of the above

Last Answer : Answer: C

Which type of flux should be used when soldering electrical wire connections and electronic components? A. Silver flux B. Rosin flux C. Solid flux D. Acid flux

Description : Which type of flux should be used when soldering electrical wire connections and electronic components? A. Silver flux B. Rosin flux C. Solid flux D. Acid flux

Last Answer : Answer: B

Before servicing the device indicated as 'A' in panels #1 and #3 of the illustration, the device labeled 'CT' must __________. EL-0003 A. have the disconnected leads taped to prevent short circuiting. B. only be connected to multimeter on the ammeter setting C. be short circuited D. have one lead grounded to discharge static electricity for the prevention of damage to electronic components

Description : Before servicing the device indicated as 'A' in panels #1 and #3 of the illustration, the device labeled 'CT' must __________. EL-0003 A. have the disconnected leads taped to prevent ... D. have one lead grounded to discharge static electricity for the prevention of damage to electronic components

Last Answer : Answer: C

Motor controllers are seldom troubled by grounds because ________________. A. cabinet heaters always keep internal components dry B. special insulation is used on wire for vital circuits C. shock mounts on controller panels greatly reduce vibration D. contactors and relays are mounted on nonconducting panels

Description : Motor controllers are seldom troubled by grounds because ________________. A. cabinet heaters always keep internal components dry B. special insulation is used on wire for vital circuits C. ... on controller panels greatly reduce vibration D. contactors and relays are mounted on nonconducting panels

Last Answer : Answer: D

When troubleshooting a console circuit card which is suspected of being faulty, the first step would be to _____. A. pull the card and measure the value of all resistors B. check for the correct value and polarity of all power connections to the card C. de-energize and pull the card to visually inspect for burned components D. check for continuity of circuit board traces and then the gain of each transistor

Description : When troubleshooting a console circuit card which is suspected of being faulty, the first step would be to _____. A. pull the card and measure the value of all resistors B. check for the ... for burned components D. check for continuity of circuit board traces and then the gain of each transistor

Last Answer : Answer: C

To avoid damaging the components of a printed circuit board when testing it with a DC volt-ohmmeter, you should _______. A. ground the board B. avoid reversing the polarity of the leads C. isolate sensitive components with heat sinks D. all of the above

Description : To avoid damaging the components of a printed circuit board when testing it with a DC volt-ohmmeter, you should _______. A. ground the board B. avoid reversing the polarity of the leads C. isolate sensitive components with heat sinks D. all of the above

Last Answer : Answer: B

A solid-state circuit is inoperative; the FIRST action that should be taken is to ____________. A. wiggle all the components to check for loose connections B. check all the resistors C. change all transistors D. check the DC supply voltage

Description : A solid-state circuit is inoperative; the FIRST action that should be taken is to ____________. A. wiggle all the components to check for loose connections B. check all the resistors C. change all transistors D. check the DC supply voltage

Last Answer : Answer: D

On AC vessels, which of the following statements represents the most difficult problem involved in obtaining a DC potential suitable for use by computer components? A. A stepdown transformer is always required. B. Vessel vibrations affect the voltage source. C. The voltage must be rectified and made ripple free. D. Rectifiers cannot operate with voltage regulators.

Description : On AC vessels, which of the following statements represents the most difficult problem involved in obtaining a DC potential suitable for use by computer components? A. A stepdown transformer is ... voltage must be rectified and made ripple free. D. Rectifiers cannot operate with voltage regulators.

Last Answer : Answer: C

Why is it a poor practice to use a high wattage soldering iron when soldering or desoldering components on a printed circuit board? A. The circuit board will blister and warp. B. The foil wire bonded to the board may come loosened from the board. C. The circuit board has a low melting temperature. D. The solder is kept to a dull heat dissipating finish.

Description : Why is it a poor practice to use a high wattage soldering iron when soldering or desoldering components on a printed circuit board? A. The circuit board will blister and warp. B. The foil wire bonded ... board has a low melting temperature. D. The solder is kept to a dull heat dissipating finish.

Last Answer : Answer: B

A switchboard, for a AC electrical distribution system, will be provided with which of the following components? A. Frequency meter. B. Ammeter C. Voltmeter D. All of the above

Description : A switchboard, for a AC electrical distribution system, will be provided with which of the following components? A. Frequency meter. B. Ammeter C. Voltmeter D. All of the above

Last Answer : Answer: D

When a solid-state component of an electronic circuit is mounted to a metallic mass, the general purpose of that mass is to ____________. A. prevent vibration damage to delicate components B. prevent mechanical damage to solid-state components C. dissipate stray magnetic currents D. act as a heat sink

Description : When a solid-state component of an electronic circuit is mounted to a metallic mass, the general purpose of that mass is to ____________. A. prevent vibration damage to delicate components B. prevent ... damage to solid-state components C. dissipate stray magnetic currents D. act as a heat sink

Last Answer : Answer: D

Which of the following components are used to assemble a fluorescent lighting system? A. Lamp B. Starter C. Ballast D. All of the above

Description : Which of the following components are used to assemble a fluorescent lighting system? A. Lamp B. Starter C. Ballast D. All of the above

Last Answer : Answer: D

Which of the following components are used to convert alternating current produced in the generator windings to direct current? A. Armature and equalizer B. Commutator and brushes C. Rotor and interpoles D. Field and exciter

Description : Which of the following components are used to convert alternating current produced in the generator windings to direct current? A. Armature and equalizer B. Commutator and brushes C. Rotor and interpoles D. Field and exciter

Last Answer : Answer: B

Which of the listed components does line 'C' represent for the transistor illustrated? EL-0068 A. Grid B. Plate C. Emitter D. Collector

Description : Which of the listed components does line 'C' represent for the transistor illustrated? EL-0068 A. Grid B. Plate C. Emitter D. Collector

Last Answer : Answer: C

What is represented by the solid dots within components 'B' and 'C' of the diagram shown in the illustration? (See illustration EL-0081) EL-0081 A. The fact that these parts are subject to wear and replacement. B. An indication that they are for 110 volt AC operation only. C. The particular components contain a gas such as neon or argon. D. All of the above.

Description : What is represented by the solid dots within components 'B' and 'C' of the diagram shown in the illustration? (See illustration EL-0081) EL-0081 A. The fact that these parts are subject to wear and ... only. C. The particular components contain a gas such as neon or argon. D. All of the above.

Last Answer : Answer: C

The purpose of the capacitor within component 'B' of the circuit shown in the illustration is to ____________. EL-0081 A. prolong the life of the component's contacts B. discharge the neon within the envelope C. counteract the inductive reactance in the circuit D. store power to operate the circuit should 'D' open

Description : The purpose of the capacitor within component 'B' of the circuit shown in the illustration is to ____________. EL-0081 A. prolong the life of the component's contacts B. discharge the neon within ... the inductive reactance in the circuit D. store power to operate the circuit should 'D' open

Last Answer : Answer: A

Electric strip heaters are used in motor controllers to _____________. A. prevent freezing of movable contacts B. keep the components at their design ambient temperature C. prevent condensation of moisture D. minimize resistance in internal circuits

Description : Electric strip heaters are used in motor controllers to _____________. A. prevent freezing of movable contacts B. keep the components at their design ambient temperature C. prevent condensation of moisture D. minimize resistance in internal circuits

Last Answer : Answer: C

Tightly knit metal braid wire can be used with a printed circuit board when ___________. A. conductor flexibility is required B. desoldering components in the circuit C. electrically produced magnetic fluxes would cause inaccuracies in adjacent components D. reactance in the circuit must be kept to a minimum

Description : Tightly knit metal braid wire can be used with a printed circuit board when ___________. A. conductor flexibility is required B. desoldering components in the circuit C. electrically produced magnetic ... cause inaccuracies in adjacent components D. reactance in the circuit must be kept to a minimum

Last Answer : Answer: B