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What is the advantages of high voltage low current over low voltage high current?
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How do you measure the current and voltage in high tension line?
To measure high voltage use suitable instrument transformer (potential transformer) Very carefully. It can kill you. The higher the voltage the more the danger or arcing over even when two conductors are not touching. Voltage meters are rated and the rating should not be exceeded. Depending on the voltage you will need the proper meter and a high voltage probe rated for the voltage you are measuring. If you don't know what you are doing, don't mess with high voltage. Leave to the pros.
What is an object called that melts under high voltage to protect circuits?
A device that melts under high current , not high voltage is a circuit protective fuse. There are many fuses that are rated for voltages in the 10,000 volt range. It is the over current that trips them.
Is a current relay same as potential relay?
current relay are using for over current low state & high state.but potential relay are related to voltage.
What is medium and high voltage?
Medium voltage is over 1000 v, high voltage is over 45 kV.
Is there a different when electrocuted with a current of high and low voltage?
High-voltage systems have extremely high levels of energy and, so, coming into contact* with a high voltage conductor will likely cause catastrophic external burns at the current's entry/exit points, as well as internally along the current path. The likely of recovery from high-voltage electrocution is low. Anyone who does recover may have irreversible organ damage. (*It's not even necessary to come into physical contact with a high-voltage conductor, as merely approaching within its vicinity may be enough for flash-over to occur.)
What are the advantages of power transformers over voltage transformers?
Power transformers can be used for power transformation. Voltage transformers are not suitable for high power applications.
What are the advantages and disadvantages of JFET over BJT?
An advantage of JFET is stable high current operation. A disadvantage of JFET is low capacitance. An advantage of BJT is constant voltage operation. A disadvantage of BJT is low thermal conductance.
How do you measure the current and voltage in high tension line?
To measure high voltage use suitable instrument transformer (potential transformer) Very carefully. It can kill you. The higher the voltage the more the danger or arcing over even when two conductors are not touching. Voltage meters are rated and the rating should not be exceeded. Depending on the voltage you will need the proper meter and a high voltage probe rated for the voltage you are measuring. If you don't know what you are doing, don't mess with high voltage. Leave to the pros.
What is an object called that melts under high voltage to protect circuits?
A device that melts under high current , not high voltage is a circuit protective fuse. There are many fuses that are rated for voltages in the 10,000 volt range. It is the over current that trips them.
Is a current relay same as potential relay?
current relay are using for over current low state & high state.but potential relay are related to voltage.
What is medium and high voltage?
Medium voltage is over 1000 v, high voltage is over 45 kV.
Can a short circuit cause low voltage?
Most likely a short circuit will cause no voltage. Due to the high current on a short circuit fault the over current protection of the circuit will trip. This will cut the voltage supply off completely.
Is there a different when electrocuted with a current of high and low voltage?
High-voltage systems have extremely high levels of energy and, so, coming into contact* with a high voltage conductor will likely cause catastrophic external burns at the current's entry/exit points, as well as internally along the current path. The likely of recovery from high-voltage electrocution is low. Anyone who does recover may have irreversible organ damage. (*It's not even necessary to come into physical contact with a high-voltage conductor, as merely approaching within its vicinity may be enough for flash-over to occur.)
Advantages of ac generators over dc genrators?
The output of an AC generator can be stepped up with a transformer. The high voltage can be more easily transferred over longer distances with higher gauge wire. At the destination, the high voltage can then be stepped back down with another transformer.
Can a numerical relay give protevtion to over current over voltage and short circuit current at the same time?
Yes. Most microprocessor based relays that have both voltage and current inputs can provide overcurrent and over voltage protection simultaneously. Short circuit current is the same as overcurrent.
Why you use alternating current for long distances why not direct current?
we can step up different ranch by Alternating current. it is less voltage drop then d.c and a.c current is chi pest then dc current .AnswerA.C. is more-widely used than d.c. because the voltage level of a.c. is easily increased to high voltages using transformers. High-voltage is essential for electricity transmission, as it results if a lower load current for a given load -thus reducing voltage drops, and enabling the use of conductors of lower cross-sectional area. However, d.c. is also widely-used for long-distance h.v. transmission, as it has several advantages over a.c. -e.g. less losses, and no synchronisation problems with other systems (making it ideal for international links). So, in some respects, d.c. is better than a.c. over long distances.
Why is electric current produced by power plants is transmitted as alternating current?
Because AC allows the power to be transmitted over distance at high voltage and then transformed down for the users.
