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the current ratio I1/I2 is a constant for all loads. the total current drawn on the secondary winding of a transformer depends on the total circuit impedance as seen by the transformer output terminals. considering that the power in primary is equal to the power in the secondary and is a constant (assuming no losses as per the principle of conservation of energy). The input voltage(primary) is a constant i.e equal to the primary distribution line voltage, and the secondary distribution line voltage is also operated at a constant value. therefore KVA(primary) = KVA( secondary) V1I1=V2I2 I1/I2 =V2/V1 which is a constant irrespective of the load.
What else can I help you with?
Current ratio is opposite than voltage ratio in transformer?
Yes
How do you calculate current on the primary side of a transformer only knowing the turns ratio and the voltage ratio?
The primary current on a loaded transformer depends on the secondary current, which is determined by the load. So, if you know the secondary load current, then you can use the turns ratio of the transformer to determine the primary current:Ip/Is = Ns/Np
What is current ratio on a transformer?
It's approximately the inverse of the voltage- or turns-ratio:
What reference to a transformer the current times the number of turns is called the?
Transformer turns ratio
What remains unchanged in transformer action?
In a standard transformer, the ratio of input volts to output volts remains constant.
What are the Causes of phase angle error and ratio error at Current Transformers?
RATIO ERROR The secondary current is less than the expected value. The secondary is less in magnitude. This diffence is known as ratio error. PHASE ERROR The angle between the expected and actual secondary current is known as phase error.
Could you provide me with the inside diagram of a current transformer?
A current transformer is just a transformer designed to dutifully give an output related to turns ratio 1:xx.
What is the name of the device that changes the ratio of a current in voltage?
A transformer. it steps up / down voltage, and steps down / up current.
Is ct step up or step down?
'CT' is used to designate current transformers, and 'PT' is used to designate potential transformers. A current transformer provides a ratio of primary current to the secondary. A potential transformer provides a ratio of primary voltage to the secondary. A power transformer (step up or step down) resembles a PT more than a CT.
How differential protection work in a transformer?
Power flowing into a transformer must match the power flowing out (minus losses which are minimal). If this is not the case, there's something wrong. Differential protection monitors current only; Current flowing into one side of the transformer will be equal to current flowing out the other side scaled by the turns ratio of the transformer. Since the turns ratio is equivalent to the voltage ratio, this is easily set.
Does a transformer increase amps?
The primary current is determined by the secondary current, not the other way around. For example, a step up transformer will step up the primary voltage in proportion to the turns ratio of the transformer. Any secondary current is then determined by the secondary voltage and the load, NOT by the primary current. The primary current is then determined by the secondary current in proportion to the reciprocal of the turns ratio.
What determines the output voltage and the current of a transformer?
The ratio of output windings to input windings determines the ratio of output voltage to input voltage. The ratio of current is the inverse.
