How to choose the right surge protection device?(1)

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How to choose the right surge protection device?(1)


How to choose the right surge protection device?
As everyone knows, surge protection devices protect electrical equipment against overvoltages caused by lightning. That said, it is not always easy to distinguish between the various technologies or know which to choose.

First of all, current standards define three categories of surge protection devices for low-voltage electrical installations:

Type 1: These devices are capable of discharging a very high lightning current, generally from earth to the power distribution system. They are installed in the main electrical switchboard when the building is equipped with a lightning protection system.

Type 2: These are surge protection devices designed to discharge the currents generated by indirect lightning strokes and causing induced or conducted overvoltages on the power distribution network. They are installed in the main distribution switchboard.

Type 3: These are surge protection devices installed as a supplement to Type 2 devices and are designed to reduce the overvoltage at the terminals of sensitive equipment. Their current discharge capacity is very limited. As a consequence they cannot be used alone.

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