SHORT CIRCUIT SHORT CIR CUIT CIRCUIT STUDY IN ELECTRICAL TECHNOLOGY Presented By: K.V.V.S.CHAKRADHAR IV Year EEE, JBREC.
CONTENTS
ABSTRACT
INTRODUCTION
WHAT IS SHORT CIRCUIT?
SHORT CIRCUIT ANALYSIS
BENEFITS OF SHORT CIRCUIT STUDY
PREVENTIONS OF SHORT CIRCUIT
RECENT SHORT CIRCUIT ACCIDENTS IN AP
CONCLUSION
ABSTRACT
Short Circuit (Fault Current) studies are required to insure that existing and new equipment ratings are adequate to withstand the available short circuit energy available at each point in the electrical system Fault currents that exceed equipment ratings are capable of extensive equipment damage and are a serious threat to human life
INTRODUCTION
Fires from electrical cords or from wiring devices are increasing in these years.
The reason is supposed to be the increase of electrical power dissipation for domestic use. India has approximately 60000 fires a year. These fire accidents are occurred due to short circuit.
Ye a r Total number of fires
1980 59,885
Electric heater for cooking
1981 59,865
1982 63,272
1983 58,833
1984 59,674
1985 55,763
192
193
155
176
190
Electric room heater
363
457
539
511
637
503
Cable for lighting or telephone
800
881
930
944
972
978
Electrical equipments
502
445
471
447
453
489
819
713
428
507
Electrical appliances Wiring devices
398
459
468
450
Light including neon light
358
321
331
310
130 1,659
128 1,564
94 1,582
98 1,590
Electric Iron Others
Note : Blank is due to the change of
WHAT IS SHORT CIRCUIT?
A short circuit is a fault. It means there is a very low resistance conducting path from one side of a component to the other A short circuit in an electrical circuit is one that allows a current to travel along a different path from the one originally intended. . The electrical opposite of a short circuit is an " open circuit", which is an infinite resistance between two nodes.
A wire might have come loose which connects two sides of a circuit together
Shorting out a single component which is in series with others
Shorting out a whole circuit
ram of the shorting circuit in transfor .
Figure shows Normal and short circuit conditions
Prevention of short circuit
When the cables of the electrical appliances are worn out or it's not connected properly a short circuit may occur. ALWAYS ENSURE THAT THE EQUIPMENT AND ANY TEST EQUIPMENT YOU ARE USING IS PROPERLY GROUNDED AND THAT THE RUBBER MAT YOU ARE STANDING ON IS IN GOOD CONDITION
DISCOLORED OR LEAKING TRANSFORMER BEFORE YOU ENERGIZE THE EQUIPMENT, LOOK FOR: SHORTS LOOSE, BROKEN, OR CORRODED CONNECTION DAMAGED RESISTORS OR CAPACITORS ENERGIZE THE EQUIPMENT AND LOOK FOR: SMOKING PARTS
DAMAGES
Damage from short circuits can be reduced or prevented by employing fuses , circuit breakers, or other overload protection protection, which disconnect the power in reaction to excessive current. Overload protection must be chosen according to the prospective short circuit current in a circuit.
Benefits of short circuit study
Reduce the risk a facility could face and help avoid catastrophic losses. Increase the safety and reliability of the power system and related equipment. Evaluate the application of protective devices and equipment. Identify problem areas in the system. Obtain recommended solutions.
Conclusion
Finally from this short circuit study, We have to learn about short circuit And we can clarify from some doubtable question like, what is short circuit?, how it happens?, when it happen?, why it happens?. And also learn prevention methods of short circuit. We can know the advantages about short circuit study.
Recently, 23000 fire complaints a year from all over over state. state. There are a ccidents are lot of fire fire accidents acc idents are occurred due to these short circuit. To protect the buildings from these short circuit, we have to learn about this short circuit phenomenon. The main aim of study of short circuit is protect the peoples/buildings peoples/buildings from short circuited fire incidents.
