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If voltage is not equal to current then are insulators rated in voltage or current?
Howiel
Insulators are always rated for voltage. Voltage, or potential difference, is the energy that is available to make the electrons jump from the conductor, through the insulator, to the next available conductor. Current is the electron flow through the wire.
A great example of why current is not an issue in insulation issues is that you could have 1000 amps (the measurement of current) going through a wire at 1 volt and have no problem with almost any insulator. You would need a very good insulator for less then a amp of current though if the voltage was 100,000 volts.
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Why the rating of lightning arrestor is less than its rated voltage eg for 400 kv system it is 360?
The MAXIMUM rated voltage is the voltage at which the electricity would arc across the insulators The usage voltage is lower than the rated voltage (usually somewhere around 80% The lightning arrestor voltage is in between. It will not pass current at the usage voltage, but will pass current when the voltage exceeds the arrestor threshhold
If voltage is not equal to current then are insulator rated in voltage or current?
Insulators are always rated for voltage. Voltage, or potential difference, is the energy that is available to make the electrons jump from the conductor, through the insulator, to the next available conductor. Current is the electron flow through the wire.A great example of why current is not an issue in insulation issues is that you could have 1000 amps (the measurement of current) going through a wire at 1 volt and have no problem with almost any insulator. You would need a very good insulator for less then a amp of current though if the voltage was 100,000 volts.
What is rated voltage and current in transformers and how to calculate them if given 50k VA?
Rated voltage is the voltage at primary side. Rated current can be found from the equation, Rated Current= Output KVA / Output rated voltage
What is meant by rated voltage rated current and rated power of a transformer?
The ratings state the limits on voltage and current for operating the transformer at full load. The rated voltage times the rated current gives the rated VA of the transformer. Transormers are not usually rated directly for power because this depends on the power factor of the load applied.
Why Voltage x Current do not equal rated power?
In an AC system power is equal to Voltage x Current x Power factor. Power factor is not constant and depends on the type of the load. Ideal value of the Power factor is 1, where as practically remains less then 1.
What is the current of a 45 kva transformer?
Presumably, you are asking what is the rated secondary current for a 45 kV.A (not 'kva') transformer? The answer depends on its rated secondary voltage. To obtain the rated secondary current, you divide the (apparent) power rating by its secondary rated voltage.
Why transformer is rated inkva?
Because it's the product of the transformer's rated secondary voltage and its rated secondary current. The product of voltage and current, in a.c., is the volt ampere.Incidentally, it's 'kV.A', not 'kva'.
What is current capacity of 1200kva genarator?
The current rating of a 16 kV.A (not 'kva') depends upon the voltage rating of that generator, with 16 kV.A being the product of the rated current and the rated voltage.
How fuses are rated?
Fuses are rated by amperage (current) and voltage. The larger the current need, the larger the rating of the fuse, to handle the current. The voltage rating of a fuse defines the maximum value of circuit voltage in which the fuse can be safely used. A fuse should not be used in a circuit with a voltage exceeding the voltage rating of the fuse.
What is long rod insulator?
High rod insulators are used for the insulation of medium and high voltage transmission lines. Long rod insulators meet IEC standards and are rated up to 800 kV.
What is meaning of apparent power in transformer?
Apparent power is the product of voltage and current in an a.c. system, and is expressed in volt amperes. The rated apparent power of a transformer is the product of its rated secondary current and rated secondary voltage.
If a centre tap transformer rated as 12V-0-12V 1Athen what will be the secondary current of that perticular transformer?
The output voltage of a transformer is not connected to the maximum rated current. You state that the transformer is rated at 12-0-12 at a current of 1A, therefore the maximum (rated) current on the secondary would be 1A. Normally, transformers are rated in VA (volt amps) which is simply voltage x current, the voltage across the two 12v terminals would be 12+12 volts, making the rating of the transformer 24VA.
