In the market, there are several common types of 380V regulators:
1.Auto-Regulator: An auto-regulator is a common type of regulator that uses the principle of an autotransformer to regulate the input voltage to output a stable 380V voltage. The auto-regulator has the advantages of small size and low cost, and is suitable for general small electrical equipment.
2.Electronic voltage regulator: The electronic voltage regulator uses electronic components to achieve stable voltage regulation, usually using electronic components such as SCR to control the output voltage to ensure that the output is stable at 380V. The electronic voltage regulator has the characteristics of fast response speed and high adjustment accuracy, and is suitable for equipment with strict voltage requirements. 
3.Oil-immersed regulator: Oil-immersed regulator is to soak the main components of the regulator in insulating oil, and achieve voltage stability through heat dissipation, insulation and suppression of electromagnetic interference. Oil-immersed regulators have the advantage of good stability and are suitable for high-power equipment, and are usually used in power distribution systems or critical equipment.
4.Transformer regulator: The transformer regulator realizes the regulation of voltage through the principle of transformer, and realizes the stability of voltage by changing the transformer turn ratio of input and output. The transformer voltage regulator has the characteristics of simple structure and convenient maintenance, and is suitable for some economical voltage stabilizing equipment.
5.Series regulator: The series regulator is to regulate the voltage by connecting the resistor, inductor and other components in series, and to stabilize the output voltage by changing the resistance value of the series element. Series regulators are typically used for low-power appliances or special occasions for voltage regulation.
In general, different types of 380V regulators are different in terms of use characteristics, scope of application and stability, etc., and it is necessary to choose the appropriate regulator type according to actual needs. When selecting a voltage regulator, factors such as equipment power, required stability, and cost need to be considered to ensure that the voltage regulator can meet the voltage requirements of the equipment.