series connection
Series connection is to connect the electric heating tubes end to end as shown in the figure above
The main characteristics of series circuits are:
The currents in all series electric heating tubes are equal, I = L1 = L2 = L3 = ... = Ln.
The total voltage after series connection is the sum of the terminal voltages of all electric heating tubes, Utotal=U1+U2+U3+...+Un.
Parallel connection
Parallel connection is a connection method in which the heads of the electric heating tubes are connected to each other as shown in the figure above, and the tails are also connected at the same time.
The main characteristics of parallel circuits are:
The voltage of all parallel electric heating tubes is equal to the power supply voltage.
The total current of the parallel circuit is the sum of the currents of all electric heating tubes.
star/wye connection
The star connection method is also called the Y connection method. The connection method is as shown in the figure. First, connect one section of each electric heating tube, and then lead out three live wires from the other end.
It should be noted that if the number of electric heating tubes is large, they need to be grouped and connected in parallel before wiring, and the number of electric heating tubes needs to be a multiple of 3.
delta connection
As shown in the figure, connect the electric heating tubes end to end in turn, and lead out each connected point as three phase lines of three-phase electricity.
Like the star connection method, if the number of electric heating tubes is large, they need to be grouped and connected in parallel before wiring, and the number of electric heating tubes needs to be a multiple of 3.
