If it is a heating tube with a rated voltage of 220V, it needs to be connected to a 380V circuit, and a star connection is required.
If it is a heating tube with a rated voltage of 380V, it needs to be connected to a 380V circuit, and a delta connection is required.
If it is a heating tube with a rated voltage of 380V, the rated power of the heating tube cannot be reached if the star connection method is used. The actual power is about one third of the original rated power (220*220)/(380*380).
The heating of the electric heating tube is mainly due to the internal heating wire passing the current heat, and the wiring method determines the current and voltage state of the energization, so the wiring method of the electric heating tube is very important. The influence of the wiring method on the electric heating tube can be understood through the article about the influence of the electric heating tube wiring method. Under reasonable conditions of use, the higher the voltage and power, the higher the heating efficiency of the electric heating tube. The wiring method of the heating tube determines the way the external voltage and current pass through the resistance wire, so the choice of the wiring method of the electric heating tube has very important practical significance. So how do we choose the wiring method of the electric heating tube?
Here is a brief introduction to this problem: There are two commonly used heating tube wiring methods on the heating tube: delta connection and star connection (also known as Y-connection)
1, Delta connection:
① Delta connection: the first end of each element of the electric heating tube is connected to the end of another element, and the three contacts are respectively connected to three phase wires;
②The characteristics of the delta connection method: the rated voltage of the three electric heating tube elements is 380 volts; if the resistance values of the three elements are different, it does not affect the feasibility of this connection method. The power and current of the delta connection are three times that of the star connection.
2, Star connection:
①Star connection: the heating elements of three electric heating tubes, the head of each element is connected together (this point is called the neutral point), and the three tail ends are respectively connected to three phase wires.
②When the rated voltage of the three components is 220V; if the resistance values of the three components are different, the neutral point should be connected to the neutral line.