Surge Protection

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…

Rating Guide SPD Uc and MCOV values such as 150V, 275V, 320V, 385V, 440V, and 480V are common in catalogues and datasheets. This guide explains what these ratings usually mean,…

OEM Documentation Guide OEM buyers often compare surge protective devices from IEC-style and UL-style markets. One datasheet may use Uc, while another may use MCOV. This guide explains how to…

Calculation Guide SPD Uc calculation should start from the power system and the protection mode, not from a catalogue voltage name alone. This guide explains how TN, TT, IT, and…

Market Selection Guide SPD Uc and MCOV selection can vary across IEC-style, UL-style, GB/T 18802.1-style, and export markets. The difference is not only a translation issue. It involves terminology, system…