Interview Questions.

Question 1. What Is Called A Substation?

Answer :

A Substation is an intermediate switching, reworking or converting station among the generating station and the low tension distribution network situated normally on the consumer’s load centre.

Question 2. What Is The Function Of A Substation?

Answer :

The Substation receives electricity from the producing station by using a signal or more feeders at a excessive voltage, transforms the identical to unique distribution voltages and sends the strength to distinct purchasers through distribution community.

Electrical and Electronics Engineering Interview Questions
Question 3. What Are The Classifications Of The Substations According To The Design?

Answer :

Indoor substation 
Outdoor substation
Pole hooked up substation
Underground substation.
Question 4. What Is Called Indoor Substation?

Answer :

The Substation, of which the equipments are hooked up indoor for voltages upto 11kV because of monetary consideration, is referred to as as indoor Substation. In case of infected atmospheric situation these substations may be erected for voltages upto 66kV.

Question 5. What Is Called Outdoor Substation?

Answer :

The Substation for voltage 33kV and above, wherein the equipments are hooked up outside due to the fact for such voltages, the clearance among conductors and the gap required for various equipments becomes so fantastic that it isn't good value to put in indoor, is referred to as outside substation.

Digital Electronics Interview Questions
Question 6. What Are The Factors To Be Considered For Selection Of Site Of An Outdoor Type Substation?

Answer :

The following factors are to be taken into consideration in selection the website online of an outdoor type substation :- 

The website must be positioned closed to the centre of its supply location.
Sufficient land is to be available at an inexpensive fee and without much difficulty for the construction of substation and the accommodation of the working team of workers.
The web page must be faraway from the densely populated locality.
The website should have clean get entry to for having delivery.
Question 7. What Are The Advantages And Disadvantages Of An Outdoor Type Substation Over An Indoor Type Substation?

Answer :

The outdoor kind substation has the subsequent advantages over indoor sub-station :-

All equipments are close by and accessible ; faults and defects can consequently, be easily located and rectified.
The substation equipments may be spaced sufficiently apart.
The effect of fault in one segment do now not have an effect on the healthful section.
The value of erected is comparatively less as no massive homes are required to be erected to house the substation equipments.
The time required for erected is lesser.
Future extensions and alterations can be made without a lot problem.
The hazards of out of doors type substation are as follows :

As the equipments are open to environment the affect of speedy fluctuation in ambient temperature, dust and dirt deposited on the equipments makes it vital to put in mainly designed equipments which can be costlier.
More space is required for the out of doors substation as buses and different live parts are bare and extra clearance is essential.
The numerous switching operations, fault restore and preservation grow to be tough in rough and inclement weather.
Electrical Engineering Interview Questions
Question 8. What Is Pole Mounted Substation?

Answer :

Pole hooked up substation is the outdoor type cheapest form of substation for voltages not exceeding 33kV wherein the equipments are mounted overhead on H-pole or 4-pole shape and electric powered strength is almost allotted in localities thru such substation.

Question 9. What Is Called Underground Substation?

Answer :

In thickly populated regions where the to be had space for substation equipment and building is restrained and cost of land is high, the substation gadget are located underneath floor and then it's miles stated to be underground substation which calls for more careful attention than other kinds of substation.

EDI (digital information Interchange) Interview Questions
Question 10. What Are The Classifications Of The Substations According To Its Functions?

Answer :

Transformer substation,
Converting substation,
Frequency substation,
Switching substation,
Power component correction substation,
Industrial substation.
Question eleven. What Is A Transformer Substation?

Answer :

A substation, in which the voltage is either stepped up or stepped down by means of a transformer, is known as a transformer substation.

Doctor Interview Questions
Question 12. What Is A Converting Substation?

Answer :

A substation, where a.C. Electricity is transformed into d.C. Strength, is called converting substation.

Electrical and Electronics Engineering Interview Questions
Question thirteen. What Is A Frequency Substation?

Answer :

A substation, in which the frequency is changed from one price to the every other cost with the assist of frequency converter, is referred to as frequency substation.

Question 14. What Is A Switching Substation?

Answer :

A substation, in which easy switching operation of strength lines is finished with out the voltage degree, is called as switching substation.

Question 15. What Is Power Factor-correction Substation?

Answer :

A substation located on the receiving give up of the transmission traces, wherein electricity component correction is done by means of the usage of generally synchronous condensers, is called as strength issue-correction substation.

Analogue electronics Interview Questions
Question sixteen. What Is An Industrial Substation?

Answer :

A substation, from which the power is provided to person industrial concern, is known as business substation.

Question 17. What Are The Classification Of The Substation According To Their Location In The Power System Networks?

Answer :

Step up substation,
Primary grid substation,
Secondary substation,
Distribution substation,
Bulk deliver and industrial substation,
Mining substation
Mobile substation.
Electrician Interview Questions
Question 18. What Is The Location Of Step Up Substation?

Answer :

The step up substation is associated with the power station where the era voltage is stepped up to the primary transmission voltage.

Digital Electronics Interview Questions
Question 19. What Is Called Primary Grid Substation?

Answer :

The substation created at suitable load centres along the number one transmission line, wherein the primary transmission voltage is stepped right down to some of suitable secondary transmission voltages, is referred to as primary grid substation.

Question 20. What Is Secondary Substation?

Answer :

The substation created at real load point alongside the secondary transmission traces, in which the voltage, is similarly stepped down to sub-transmission or number one distribution voltage, is known as secondary substation.

Electrical Machines Interview Questions
Question 21. What Is Distribution Substation?

Answer :

The substation, wherein the sub transmission voltage or the primary distribution voltage is stepped done to supply voltage for feeding the clients through a network of distribution strains, is known as distribution substation.

Question 22. What Is Bulk Supply & Industrial Substation?

Answer :

The distribution substation created for an person bulk deliver patron or an industrial customer of massive or medium deliver ground is known as bulk deliver and industrial substation.

Question 23. What Is Mining Substation?

Answer :

The mining substation is a particularly is a mainly designed substation created for the reason of mining set up which offers extra precaution for safety in the operation of electrical supply.

Electrical Power System Interview Questions
Question 24. What Is Called Mobile Substation?

Answer :

The substation, which is created for brief requirements of specially production functions, is called cell substation.

Electrical Engineering Interview Questions
Question 25. What Are The Main Equipments And Accessories Used For Substation?

Answer :

High voltage isolator,
High voltage switchgear,
Main busbars,
Transformer,
Low voltage switchgear and busbars,
Cables,
Fuses,
Auxiliary equipments,
Instrument transformers,
Measuring gadgets,
Indicating gadgets,
Protective,
Control cable & circuits etc.