Although the theoretical reference value for the single-phase supply, or three-phase using Neutral is 230 V in a plug, in practice it happens that this value can oscillate between 190 Volts and 270 Volts, depending not on only of our electrical installation, but also of the electrical installation of the supply company, of its state, electrical overload and transformation center.

These voltage fluctuations can cause serious damage to our electronic equipment if we do not take measures to control them.

A good solution is to have this Plug Protector. Once installed, if it detects an excess voltage (rising voltage) greater than 277 V that may affect the electrical devices connected to the installation, this excess of voltage will be derived to ground, tripping the Differential Switch and disconnecting the installation.

For a correct operation of this device, two essential conditions must be met that all Correct electrical installation already has:

• The installation must have a properly installed and maintained ground circuit.
• Differential switch is required (not to be confused with thermal magnets).

It is important to note that if any electrical protection trips to protect the installation, it must be connect manually. In the case of an unattended installation where there is no person present, it must be considered that the differential switch is self-resettable. This means that the differential switch of the installation must have a mechanism to automatically connect after a differential jump.

The device simply plugs in and is ready to go. Its consumption is less than 1 W and it protects an installation regardless of the power connected to it. Since the power of the installation does not pass through this plug.

Usually the installations have several thermal magnets to protect in a sectioned way different parts of installation, but there are usually only 1 or 2 differentials. These plugs with surge protection have to connect 1 for each differential, at different points. If a differential affects an area of the installation, this plug with surge protection must be connected to any outlet in that area. if there is a second (or more) RCDs, another plug with surge protection is necessary and must be connected to that other area that is independent of the first.