Self-limiting temperature electric heating cable, also known as self-controlling temperature electric heating cable and self-controlling heating cable, is a new generation of belt-shaped constant temperature electric heating products, which can automatically limit the temperature when heating, and automatically adjust with the temperature of the heating body Output power without any additional equipment. Self-limiting temperature heating cables are a product with a high usage rate among electric heating cables. However, many users often encounter the problem of excessive starting current of the heating cables when using self-limiting temperature heating cables.
The self-limiting temperature heating cable is different from the constant power heating cable. It is a variable power product. When the electric heating system starts after installation, it must be noted that its initial starting current will be very large. Therefore, the user must take some measures to prevent the heating Excessive tropical starting current causes short circuit, burnout or other phenomena.
Aiming at the situation that the starting current of the self-limiting temperature electric heating cable is too large. We can consider using an automatic current limiter so that the starting current of the heating cable can be controlled within a certain reasonable range. The automatic current limiter is called the automatic current retarder, and the voltage and power are 220V/25-60W. The main technical feature of the automatic current limiter is that there is an automatic voltage regulating circuit connected in series with the load in the said current limiter protection box Board, the automatic voltage regulator is composed of an automatic unit circuit unit controlling the thyristor to control conduction, a delay circuit unit controlling a relay circuit unit and a DC power supply circuit.
The automatic current limiter is an instrument designed for the load starting current is large, but the current drops quickly after the load is energized, and finally reaches a balanced state.