Surge Protection

SPD Standard Guide for Buyers Buying an AC SPD? Check IEC 61643-11. Buying a PV/DC SPD for the solar DC side? Check IEC 61643-31. This guide explains the difference between…

Three-Phase SPD Wiring Guide Need a three-phase SPD wiring diagram for a distribution board, control panel, or OEM electrical cabinet? The key point is simple: a three-phase SPD is not…

Ordering SPDs in bulk is not only about price. Before a distributor, OEM buyer, or panel builder places a bulk SPD order, the supplier should confirm the real application, system…

RS485 Surge Protection Guide Not sure how to wire or select an RS485 SPD for a PLC control panel? RS485 communication lines are common in PLC systems, Modbus RTU networks,…

Solar PV DC SPD Selection Not sure whether to choose a 600V, 1000V, or 1500V DC SPD for a solar PV system? One parameter should be checked before the order…

Three-Phase SPD Selection Guide Not sure whether to order a 3P+N SPD or a 4P SPD for a three-phase distribution board? This is a common question for panel builders, electrical…

SPD parameter guide · In rating selection Not sure whether a surge protective device should use 5kA, 10kA or 20kA In? This guide explains what In means, how it differs…

SPD Imax Selection Guide Not sure whether to choose a 20kA, 40kA, 65kA, or 80kA surge protective device? Many SPD buyers compare products by the kA number first. A higher…

Country and Power System Guide SPD Uc and MCOV ratings can look different from one country or project market to another. The reason is not the country name alone. It…