Three-phase transformer Introduction

In the three-phase transformer windings star, delta connection mode based on the analysis of three-phase transformer connection group determination methods were studied, and gives specific method steps. According to the three-phase winding of the transformer with the same name as the end of the wiring diagram, determine the transformer connection group is: Draw the high voltage (primary) winding and low voltage (secondary) winding voltage phasor diagram, by the high-pressure and low-voltage windings U AB U ab winding transformer to determine the phase relationship of the linking groups label.
In actual mcb circuit breaker process, high voltage winding phasor diagram called the original disc tray made ​​of low-voltage Voltage stabilizer diagram called sub ​​tray plate made ​​of. Two concentric fixed, can be relatively rotated. Three-phase transformer connection group determination, the original disc is fixed, simply turn the sub tray, vice plate line voltage U ab point number is the number of groups of the transformer. The above analysis process without drawing phasor diagram, simple and intuitive, very convenient.