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No load current is excitation current, and is usually specified as a certain percent of base KVA rating at a specific voltage (often tested at 90, 100, and 110% rated voltage).
This can be found in the test report for the specific transformer in question, or should be supplied by the manufacturer.
Note it is specified as a percent of base, so if heated up from the high side, the current will be less than from the lowside - the transformer's excitation takes the same amount of power regardless of energizing voltage. You could test this roughly yourself by applying rated voltage to the lowside, and measuring the induced current.
The load current for a single phase 11kVA transformer would be: 11K / (L-N voltage).
What else can I help you with?
What is zero current transformer?
It is a transformer with No load attach to it.
What is the percentage of the no-load current in a transformer to its full load current?
2 to 5% of full load current
Function of no-load in transformer in a open-circuit?
To calculate the no load current from transformer & core loss is also calculated.
What will happen when we change value of load resistance in transformer?
The secondary load current will change. This, in turn, will cause the primary current to change (the primary current being the phasor sum of the [IS (Np/Ns)] and the primary current (Io).
What is the secondary rating of a 50KVA transformer?
The secondary current is determined by the load, not by the transformer. For example, if the secondary voltage is 50 V and the load is 100 ohms, then the secondary current will be 0.5 A. If the load is 25 ohms, then the secondary current will be 2 A. It is important that a continuous secondary current doesn't exceed the rated secondary current of the transformer.
The current load of a transformer is the current drawn by the?
load
What is zero current transformer?
It is a transformer with No load attach to it.
What is the percentage of the no-load current in a transformer to its full load current?
2 to 5% of full load current
How much current does a three phase 11kv 50kva transformer draw per phase no load and fully loaded and is there any significant loss in the average delta star transformer?
Fully loaded - 2.62 amps at 11kV. The no load depends on the transformer design, but it will usually be significantly less than the full load amps (not sure on this size, but on larger transformers it is typically ~.05 - .1% full load, so you'd be looking at ~2.5 mA RMS). The connection type is not important. Transformers are very efficient, thus there is not a whole lot of loss in the "average" transformer. The actual loss will depend on the design criteria of the transformer.
What is full load magnetising current of transformer?
is it primary current ?
Why no load current in transformer small?
No load current is energizing current. This is effectively "lost" power, power used in the transformer to energize the core. It, therefore, should be small!
Function of no-load in transformer in a open-circuit?
To calculate the no load current from transformer & core loss is also calculated.
How is no load current reduced?
No load current, in a transformer for example, is the current necessary for exciting the transformer. If you wish to keep it energized, and you need to keep it energized at full voltage, there is nothing you can do to reduce this other than replace the transformer with one that has lower no load current. If you are referring to a different piece of equipment, you may need to specify what you are meaning by "no load current".
What is the function of the primary current when the secondary winding of the transformer is open?
When the secondary of a transformer is opened, there is no longer any load on the transformer. There will be some current flowing in the primary winding, which is needed to induce the voltage in the secondary. This primary current is referred to as the "no load" current, and is indicative of the core losses in the transformer.
What will happen when we change value of load resistance in transformer?
The secondary load current will change. This, in turn, will cause the primary current to change (the primary current being the phasor sum of the [IS (Np/Ns)] and the primary current (Io).
What is the no load current of 1600 kva transformer?
No load current depends on the design of the transformer, and what voltage it is energized at. It will typically be below 1% of full load, and can be significantly below 1% for utility sized transformers.
What is the secondary rating of a 50KVA transformer?
The secondary current is determined by the load, not by the transformer. For example, if the secondary voltage is 50 V and the load is 100 ohms, then the secondary current will be 0.5 A. If the load is 25 ohms, then the secondary current will be 2 A. It is important that a continuous secondary current doesn't exceed the rated secondary current of the transformer.
