Phoenix contact terminal power superposition power regulator has undergone four major technical transformations. Programmable controller can be used to make the circuit control simpler and more reliable. It can flexibly adjust and compensate the sensitivity of voltage stabilization according to different electric loads, avoiding unnecessary fluctuation compensation. The frequent fluctuation of electrical components is reduced, resulting in unnecessary fluctuation of power supply system. Thus, the service life of the equipment is effectively prolonged. All voltage regulators use the same technology to stabilize the output voltage.

輸出電壓通過連接到誤差放大器。反相輸入端的分壓電阻采樣，誤差放大器的同相輸入端連接到一個參考電壓。參考電壓由IC內部的帶隙參考源產生。為此，它提供負載電流以保證輸出電壓穩定：Vout=Vref(1+R1/R2)。如果三個調壓變壓器的滑臂都是由一個電機來驅動的調壓方式為統調穩壓器，它們的工作原理同單相的穩壓器一樣。

The output voltage is connected to the error amplifier through. The voltage divider at the inverting input is sampled, and the in-phase input of the error amplifier is connected to a reference voltage. The reference voltage is generated by the bandgap reference source inside the IC. Therefore, it provides load current to ensure stable output voltage: Vout = VREF (1 + R1 / r2). If the sliding arms of the three voltage regulating transformers are driven by a motor, the voltage regulation mode is unified voltage regulator, and their working principle is the same as that of single-phase voltage regulator.

菲尼克斯端子電源的單相穩壓連接在單相電路，輸出為單相電壓電路，適用于220V電器，三相穩壓器應用于工業電器,其輸入為380V和三相電380V，一般輸出為三相三線或三相四線。三相穩壓器既可以當成三相穩壓器使用，也可以用作單相穩壓器的使用。三相穩壓器即可以為三相用電設備穩定電壓，又可以為單相用電設備做為穩定電壓。

The single-phase voltage regulator of phoenix contact terminal power supply is connected to the single-phase circuit, and the output is a single-phase voltage circuit, which is suitable for 220V electrical appliances. The three-phase voltage regulator is applied to industrial electrical appliances, with input of 380V and three-phase 380V, and the general output is three-phase three wire or three-phase four wire. The three-phase regulator can be used not only as a three-phase regulator, but also as a single-phase regulator. The three-phase voltage regulator can stabilize the voltage for both three-phase electrical equipment and single-phase electrical equipment.