In the field of electricity, the calculation of the current of wires is an important and fundamental concept. In order to help you better grasp this knowledge, this article will introduce a formula for wire current calculation, which is convenient for you to quickly and accurately complete the current calculation in practical applications.
First, the introduction of the formula.
The wire current calculation formula is a concise and easy-to-remember calculation method, and its basic form is: "Ten under five, one hundred on two, two five three on five, five hundred and fifty four, seven zero nine five two and a half times, the temperature of the pipe is ** folded, the bare wire is added by half, and the copper wire is upgraded." ”
2. Explanation of the formula.
"Ten under five" refers to wires with a cross-section of less than 10 square millimeters, and 5 A of current can be passed per square millimeter.
"One hundred and two" means that the wire has a cross-section of more than 100 square millimeters, and 2A current can pass through each square millimeter.
"2535433333333333333333335000000000000000000000000000000000000000000000000000000000000000000000000000000000000Wires with cross-sections between 35 square millimeters and 50 square millimeters can pass 3 A per square millimeter.
"Seven zero ninety-five two and a half times" means that the wire cross-section is 70 square millimeters and 95 square millimeters, respectively, can pass 25x and 2x current.
"Pipe Temperature ** Fold" means that if the wire is threaded or the ambient temperature is high, it is necessary to make an 8% or 9% discount to calculate the current.
"Bare wire by half" means that if it is a bare wire, the current value needs to be increased by half on the original basis.
"Copper wire upgrade calculation" means that if it is a copper wire, it needs to be calculated according to the current value of the previous specification.
Conclusion: Through the above explanation, we can see that the wire current calculation formula is a convenient and fast calculation method. In practical application, the accurate current value can be obtained by calculating only according to factors such as the cross-sectional area and material of the wire, combined with the formula. This method is not only simple and easy, but also has high precision and practicality.