EE8602 PS 2marks
Anna University Regulation 2017 EEE EE8602 PS 2marks & 16marks for all 5 units are provided below. EE8602 PS Short answers, Question Bank for PROTECTION AND SWITCHGEAR Engineering are listed down for students to make perfect utilization and score maximum marks with our study materials.
1] What is the need for protection zones in the power system?
Any fault occurring within the given zone will provide necessary tripping of relays or disconnecting or opening of circuit breakers and thus the healthy section is safe guarded. If a fault occurs in the overlapping zone in a proper protected scheme , more circuit breakers than the minimum necessary to isolate the faulty part of the system would trip.
2] what is surge absorber? How do they differ from surge diverter?
Surge Absorber: it is a protective device used to reduce the steepness of the wave front of a surge and absorbs energy contained in the travelling wave. Surge Diverter It will divert excess voltages from an electrical surge to earth. It measures the volts coming in and once it gets above a set amount (normally 260 volts), will divert the excess volts to earth equipment. Unlike the more common Surge
Protector Power boards that simply switch off if there is spike in volts, a Surge Diverter will just divert the excess volts away. It is also installed on your main switchboard, thereby protecting all power points.
3] Define the term “Insulation Coordination”.
Insulation Coordination is the process of determining the proper insulation levels of various components in a power system as well as their arrangements. It is the selection of an insulation structure that will withstand voltage stresses to
which the system, or equipment will be subjected to, together with the proper surge arrester. The process is determined from the known characteristics of voltage surges and the characteristics of surge arresters.
4] Write any two functions of protective relaying?
(i) The function of a protective relay is to detect and locate a fault and issue a command to the circuit breaker to disconnect the faulty element.
(ii)It is a device which senses abnormal conditions on a power system by constantly monitoring electrical quantities of the system which differ under normal and abnormal conditions.
5] What is meant by switchgear?
The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear.
6] What are the different types of fault in power system transmission lines?
1. Symmetrical faults ═ 3 phase faults
2. Unsymmetrical faults ═ Single phase to ground, single phase to open circuit,
Two phase to ground fault; phase to phase short circuit.
7] List out the types of faults in power system
A].Single phase to ground B] phase to phase faults C] Two phase to ground fault and D] Three phase short circuit faults.
8] Explain the need for overlapping the zones of protection.
1. The circuit breakers are located in the connection to each power element.
2. This provision makes it possible to disconnect only the faulty element from the system.
9] What are the functions of protective relays
To detect the fault and initiate the operation of the circuit breaker to isolate the defective element from the rest of the system, thereby protecting the system from damages consequent to the fault.
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EE8602 PS 2marks
Anna University 6th Sem EEE PS 2marks 16 marks
EE8602 PROTECTION AND SWITCHGEAR Engineering question bank free download
Anna University EEE PS short answers Regulation 2017
EE8602 2marks, PS Unit wise short answers – EEE 6th Semester