Rated power measurement:

Rated power measurement:

6.6.1 The rated power should be measured using a power meter, voltmeter, or ammeter after the component is under sufficient heating or simulated conditions and reaches the working temperature for 10 minutes. The accuracy of measuring instruments should not be lower than level 1.5.

6.6.2 The working temperature of components shall be determined using the following methods:

Under sufficient heating conditions, temperature measurements are taken using a surface thermometer or thermocouple at the designated temperature measurement points on the component casing. The average temperature measured at each measurement point is the working temperature. Take three temperature measurement points, located at the highest, lowest, and middle temperature points on the heating surface of the component.

6.6.3 When multiple components are connected in series to the power supply, the power of each component should be measured separately.

6.6.4 During factory inspection, it is allowed to measure the cold DC resistance value of the component and convert the power according to equation (4):

In the formula: P - Power, unit: kW

U - Rated voltage, in volts

R0-- Cold state DC resistance, unit: Ω

Ct -- Working temperature coefficient of electric heating wire

Many friends who are not familiar with electric heating tubes think that a low voltage of an electric heating tube saves electricity. In fact, the electricity consumption of an electric heating tube is not related to the voltage of the electric heating tube, but to the power of the electric heating tube. Normally, it is one kilowatt hour of electricity per hour.

So can reducing the voltage of the electric heating tube save electricity? The answer to this question is, this is not necessarily true. Low power saves electricity, while high power wastes electricity.

DC electric heating tube is a pure resistive load and cannot be equipped with a voltage regulator to save power. To save power, the only way is to control its usage and find ways to reduce heat loss. If it is necessary to control its heat generation and small heat is needed, a conversion switch can be used to connect every two heating tubes in series. When large heat is needed, it can be converted to parallel connection. Using a voltage regulator to adjust voltage can also be controlled, but if the power is too high and the cost of the regulator is too high, it is not cost-effective.

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