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Under the condition of a certain voltage, is there any difference between limiting power and limiting current? Why can't a 500W electric appliance (hot water kettle) be used in a 1000W circuit
When the voltage is constant, limiting the power is equal to limiting the current
Why are you limited? Tell me!
Thank you for your question
There is a single-phase transformer with rated capacity of 3.8KVA and rated voltage of 380V / 220V at primary and secondary sides. What is the rated current at primary and secondary sides?
A. the primary voltage is 380V, so the current is I = 3.8 × 1000 △ 380 = 10A
The secondary side voltage is 220 V, so the current is I = 3.8 × 1000 △ 220 = 17.3a
220 V / 110 V transformer (220 V is line voltage), capacity is 5 KVA, how to calculate the rated current on both sides?
Is the formula s = u * I or S = u * I * 1.732 used? Under what circumstances are the two formulas used?
U is line voltage and I is line current
S = u * I for single phase
S = u * I * 1.732 for three-phase
The line voltage is 220 V, so it can not be three-phase, it must be single-phase
Rated current of 220 V side I1 = 5 * 1000 / 220 = 22.72 a
Rated current of 110V side I2 = 5 * 1000 / 110 = 45.45a
Does the voltage of 220 V and power of 5.5 kW have any influence on household electricity
I bought a heat shrinkable machine for packaging. I don't know anything about electricity. The seller said that with 40-60 a air switch and 4.5 square wires, I can use it
Heat shrinkable machine: voltage 220 V, power 5.5 kw
Would you like to ask if it has any impact on the use of words in the family
How can I get it right
If 5.5kW is all electric heating, the current should be about 25A, if the distance is not too long, 4 square copper wire should be available. The air switch recommended by the seller should also meet the requirements, so it is necessary to check whether the wires laid in the home meet the conditions, and whether the meter is greater than 20A
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