Low-voltage surge protective devices – Part 31 Requirements and test methods for SPDs for photovoltaic installations
Published: 2019-07-30 EN 61643-31:2019
National Register: 7/2019 CLC / TC 37A
Descriptors: Low voltage, Testing, Photovoltaic cells, Lightning protection, Direct current, Overvoltage protection, Earth conductors, Electric wiring systems, Electrical protection equipment, Earthing, Surges (electrical), Electric power distribution, Test methods, Surge limiters, Surge protection
IEC 61643-31:2018 is applicable to Surge Protective Devices (SPDs), intended for surgeon protection against indirect and direct effects of lightning or other transient over-voltages. These devices are designed to be connected to the DC side of photovoltaic installations rated up to 1 500 V DC. These devices contain at least one non-linear component and are intended to limit surge voltages and divert surge currents. Performance characteristics, safety requirements, standard methods for testing and ratings are established. SPDs complying with this standard are exclusively dedicated to be installed on the DC side of photovoltaic generators and the DC side of inverters. SPDs for PV systems with energy storage (e.g. batteries, capacitor banks) are not covered. SPDs with separate input and output terminals containing specific impedance series between these terminals (so called two-port SPDs according to IEC 61643-11: 2011) are not covered. SPDs compliant with this standard are designed to be permanently connected where the connection and disconnection of fixed SPDs can only be done using one tool. This standard does not apply to portable SPDs Keywords: photovoltaic installations, lightning or other transient over-voltages.