How to choose the three-phase AC voltage regulator for separate and unified regulation

Three phase voltage regulators are mainly used in enterprises, hospitals, units, and other places. Therefore, many people do not understand whether to buy a three-phase integrated voltage regulator or a three-phase split voltage regulator when purchasing a voltage regulator. At this time, they often only notice that the price of a three-phase integrated voltage regulator is much cheaper than that of a three-phase split voltage regulator, so they choose to buy an integrated voltage regulator. Actually, this needs to be judged based on your electricity usage environment.。

Then, let me tell you how to choose a suitable regulator from three-phase unified regulator and three-phase separate regulator.

A three-phase voltage regulator, in simple terms, refers to a three-phase electrical output voltage that is regulated together. Each regulator only uses one driving motor, three sets of voltage regulating transformers, and one three-phase compensation transformer. The structure is simple and the price is relatively low. Suitable for machine tool voltage regulators, CNC voltage regulators, and other machines, the unified voltage regulator has a requirement for the input voltage, which is that the difference in three-phase input voltage should not be too large, generally not exceeding 20V. For example, the input voltage of AB phase is 350V, and the input voltage of AC and BC phases is 375V. In this situation, high-power voltage regulators with unified structure cannot be used, and three-phase split voltage regulators are more suitable.

three-phase voltage regulator with separate regulation of each phase of the three-phase electricity will result in a significant increase in the cost of the motor, control board, voltage regulator transformer, and compensation transformer. The advantage of this machine is that it allows for significant deviation in your three-phase input voltage without causing any deviation in the input voltage. The phase voltage output can be stable at 220V (i.e. line voltage 380V).

So, when choosing three-phase integrated voltage regulator and split voltage regulator, it is important to measure your mains input voltage. If your three-phase voltage deviation is small, it is recommended to use a three-phase integrated voltage regulator, which can fully meet your usage requirements and is relatively inexpensive. If your three-phase input voltage has a significant deviation, it is recommended to use a three-phase tap changer for better voltage regulation and better protection of your machine and load.