Three-phase power supplyConnection method 3: The sequence of live wires is yellow, green and red.
** represents phase A, green represents phase B and red represents phase C. The order of these three colors must be memorized as an electrician, just like Remember that the live wire for single-phase AC power is red, and you need to remember three colors for three-phase power. In fact, the order of these three. the colors are very easy to remember.
The delta connection method is to connect each phase power supply or load end to end in sequence, and output each connected point as three-phase lines of three-phase electricity.
Three-phase alternating current has three live wires, so they must be distinguished. The three live wires are called phase A, phase B and phase C. But all three are live wires.us voltage. How do you know which is phase A or phase B? In order to distinguish this, three colors are used to represent phases A, B and C respectively. ** represents phase A, green represents phase B and red represents phase C.
As as an electrician, you need to remember the order of these three colors, just like remembering that the live wire of single-phase AC power is red, and you need to remember three colors for three-phase power. In fact, these three colors The order is very easy to remember, yellow, green and red. Anyway, I remember it like that, and I'm never wrong. Of course, if you don't like it, you can also use it. your own method of remembering them.
Advantages of three-phase electrical connection:
Line voltage is the voltage between the live wire and the live wire. This connection method eliminates a probleme. neutral wire, does the absence of neutral line also mean that there is no phase voltage? This statement is incorrect. You can say there is no neutral line, but that doesn't mean there is no phase voltage. You can only say that the phase voltage and other line voltages are equal. Because there are windings inside the motor, the voltage of each phase coil is the phase voltage, so even if there is no neutral line, the phase voltage still exists, and we can see that the phase voltage has nothing to do with whether or not there is a neutral line. is a neutral line.