The function of some accessories in the installation process of any equipment cannot be neglected, and the installation of electric heating system is also no exception. There are many installation examples of Anbang Electric Co., Ltd. Our technicians will recommend active current limiters (ie automatic current limiters) for electric heating cables. Many customers do not understand its function very well. This special current limiter for electric heat tracing is a current limiter device designed to reduce the current to a balanced state after active adjustment when the load current is too large.
Usually, when the electric heating system is started, its starting current is about five to ten times that of normal use. The high current during startup usually lasts for 20-40 seconds. Excessive current directly affects the normal operation of the electric heating system. , and bring great danger to the safe operation of the power system in all environments. No matter whether the electric heat tracing system is used in explosion-proof places such as chemical oil, etc., or it is used in home installations, if there is no active current limiter installed, it may cause load overload. Therefore, in order to avoid such situations as the load burning out the line, it is still necessary to select an active current limiter.
Automatic current limiter for electric heat tracing system
The normal voltage of the active current limiter is 220V, its current limit value: ≤30A, no-load power: ≤5W; and the starting time is about 3-5min. The current damper can be installed in the power box or the distribution box, which is convenient to use and does not occupy the rated space.
Electric heat tracing active current limiter is also called automatic current retarder. Its main technical feature is that there is an active voltage regulation circuit board connected in series with the load in the protection box. The active voltage regulation is controlled by the active phase-shift circuit unit to control the conduction angle of the thyristor, and the delay circuit unit controls the relay circuit unit and the DC power supply. circuit composition. The current retarder actively changes the conduction angle of the pole controlled by the thyristor, so that the voltage applied to both ends of the load gradually increases, and finally reaches the rated value.
In the normal use of the electric heat tracing system, for example, the automatic current limiter plays a very important role, which can adjust the temperature well and avoid the temperature rising too fast, which affects the use. If you need to purchase an automatic current limiter, you can Contact our electric heat tracing manufacturer, we are a direct supplier of accessories, the price is relatively cheap, and the quality is not any problem.