Heating tubular element rated voltage VS. working voltage

- Dec 11, 2020-

Heating tubular element rated voltage VS. working voltage


Common rated voltages are 24V, 36V, 48V, 110V, 220V, 380V, 440V. The specific rated voltage is selected according to the actual situation of the customer. The operating voltage refers to the power supply voltage actually used by the customer. The operating voltage affects the use of the heating tube. If the value of the operating voltage is greater than or less than the rated voltage, it will affect the use of the heating tube.

Please know that after determining the electrical parameters of the heating tube before processing, the resistance of the internal heating wire is constant.


1. When the operating voltage is greater than the rated voltage, the error is within 10%, and the effect on the heating tube is not obvious. When the operating voltage is much higher than the rated voltage, the heating tube is easy to burn out, posing safety risks.


2. When the operating voltage is less than the rated voltage, because the resistance of the internal heating wire is fixed, the drop in voltage will cause the heat to drop rapidly, and even no heat is felt. Taking 380V rated voltage using 220V voltage as an example, the heating tube heat generation is only one-third of the original design, and there is almost no heat even in some use environments.


The above is about the relationship between the rated voltage and the operating voltage, as well as the influence of the two on the use of the heating tube. When purchasing the heating tube, please determine the voltage parameter to avoid affecting the use.