How to choose a surge protection device (SPD)?
prosurge2019-02-21T11:52:20+08:00Surge Protective Devices (SPD) are used to protect electrical equipment against surges (overvoltages) caused by lightning or switch of heavy duty machines (many people may ignore this). It may take some technical background when selecting a proper surge protective device as there are various technologies and regulations. The IEC 61643 standard defines 3 types of [...]