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How to solve the problem of large starting current of electric heating cable

Aug 25,2022

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Electric heating cable is a thermal insulation and antifreeze product for pipeline equipment. It has the characteristics of simple installation, high thermal insulation efficiency and convenient use. It has been widely used in pipeline equipment heat tracing and insulation in all walks of life.

The models of electric heating cables can be divided into two series, self-limiting temperature and constant power. It should be noted that the self-limiting temperature electric heating cable has a larger starting current than that of constant power.

Start-up current generally refers to the current peak value generated instantly when the electric heating cable is connected to the power supply, which is an important parameter that can reflect the quality of the electric heating cable. If the starting current is large, the length of the electric heat tracing cable of a single power supply will be shortened, which will affect the normal operation of the electric heat tracing system, and bring a great safety hazard to the operation of the power system in the entire environment. So how to solve the large starting current of the electric heating cable?

When the starting current of the self-limiting electric heating cable is large, the automatic current limiter can be used for control, and it can be installed in the power box or distribution box. Its main technical feature is that there is an automatic voltage regulation circuit board connected in series with the load in the protection box, the automatic voltage regulator is controlled by the automatic unit circuit unit to control the thyristor to control conduction, and the delay circuit unit controls the relay circuit unit and DC power supply. circuit composition. It is a meter designed for the load starting with a large current, but the current drops quickly after the load is energized, and finally reaches a balanced state.

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