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The no-load current drawn by transformer is usually what per cent of the full-load current ?
- a)0.2 to 0.5 per cent
- b)2 to 5 per cent
- c)12 to 15 per cent
- d)20 to 30 per cent
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The no-load current drawn by transformer is usually what per cent of t...
The no load current is about 2-5% of the full load current and it accounts for the losses in a transformer. These no-load losses include core(iron/fixed) losses, which contains eddy current losses & hysteresis losses and the copper(I2*R) losses due to the no Load current.
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The no-load current drawn by transformer is usually what per cent of t...
No-Load Current in Transformer
The no-load current is the current drawn by the transformer when the secondary is open-circuited, and no load is connected to it. This current is very small, but it is not zero because of the presence of iron losses in the core of the transformer.
Percentage of No-Load Current
The no-load current drawn by a transformer is usually expressed as a percentage of the full-load current. This percentage varies depending on the type and size of the transformer, but it typically falls in the range of 2 to 5 per cent.
Reason for No-Load Current
The no-load current in a transformer is caused by two types of losses:
1. Iron losses: These losses occur in the core of the transformer due to hysteresis and eddy currents. Even when there is no load connected to the transformer, these losses continue to occur, causing a small amount of current to flow through the windings of the transformer.
2. Magnetizing current: This current is required to establish the magnetic field in the core of the transformer. When there is no load connected to the transformer, this current continues to flow, causing a small amount of current to flow through the windings of the transformer.
Conclusion
In conclusion, the no-load current drawn by a transformer is typically in the range of 2 to 5 per cent of the full-load current. This current is caused by the presence of iron losses and magnetizing current in the transformer.
The no-load current is the current drawn by the transformer when the secondary is open-circuited, and no load is connected to it. This current is very small, but it is not zero because of the presence of iron losses in the core of the transformer.
Percentage of No-Load Current
The no-load current drawn by a transformer is usually expressed as a percentage of the full-load current. This percentage varies depending on the type and size of the transformer, but it typically falls in the range of 2 to 5 per cent.
Reason for No-Load Current
The no-load current in a transformer is caused by two types of losses:
1. Iron losses: These losses occur in the core of the transformer due to hysteresis and eddy currents. Even when there is no load connected to the transformer, these losses continue to occur, causing a small amount of current to flow through the windings of the transformer.
2. Magnetizing current: This current is required to establish the magnetic field in the core of the transformer. When there is no load connected to the transformer, this current continues to flow, causing a small amount of current to flow through the windings of the transformer.
Conclusion
In conclusion, the no-load current drawn by a transformer is typically in the range of 2 to 5 per cent of the full-load current. This current is caused by the presence of iron losses and magnetizing current in the transformer.
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The no-load current drawn by transformer is usually what per cent of t...
No load current of a transformer on primary side is usually 3-4 per cent of full load current. This current is mainly the magnetizing current necessary to produce the magnetic field and flux .
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