Surge protectors are designed to automatically maintain a constant-voltage mains (220/380). Functionally, provide: the full protection of electrical and electronic equipment for household and industrial use by the sudden change in the mains, stable power supply equipment in the permanent under-or over-voltage electricity; Ability to trouble-free and correct operation of electrical equipment to the unstable power supply voltage, voltage monitoring inputs and outputs, filtering noise and lack of network distortions; Automatic regulation of output voltage with high accuracy. Depending on the power supply and the connected load voltage divided by phase and three phase, depending on the principle of action – for electromechanical and electronic. Voltage regulators SRM are electromechanical type voltage regulators, which, in contrast to electron-type stabilizers, characterized by smooth automatic control of output voltage with high accuracy its maintenance, they provide excellent overload capacity and low noise. How to choose a voltage In order to determine the choice of voltage, one must first answer the following questions. What is needed voltage – single phase or three phase? In the single phase (220V) questions arise.

In the case of three-phase (380V) are possible options. If you have a three-phase network has at least one three-phase consumer, you need to install three-phase voltage regulator. If all consumers are single-phase, in most cases, it is best to pick up three-phase stabilizer. As a rule, it is cheaper. But there is one major advantage. This option allows you to bypass the feature of three-phase stabilizers, namely off the entire device when power fails at one of the phases.