From the above problem it is known that the voltage of the heating tube is 380V, and the power is 6000W
According to the formula: resistance = voltage * voltage / power
380×380÷6000=24Ω
Therefore, the resistance value of the 380V/6000W heating tube is 24Ω
It is worth noting that this resistance value is calculated as the cold state resistance value, and it is a theoretical value, after the normal heating tube is made, the resistance value is tolerance, generally -10% – +5%.
