Lightning protection measures for inverters
Lightning strikes are divided into direct lightning strikes and induction lightning. The direct lightning strike is that the lightning directly falls on the lightning strike, and the damage is the greatest; the induced lightning is the induced high voltage generated by the electromagnetic wave generated by the lightning on the conductor, and the electrical device connected to the conductor is over-damaged and damaged. On the power grid, multi-level arresters have been installed, but the residual voltage of the front-level lightning or the lightning-induced voltage near the inverter will still cause damage to the inverter.
Solution: Install the incoming lightning arrester in the inverter control cabinet. The incoming lightning arrester can be powered by a lightning protection module, installed on the slide rail, and grounded in parallel. The arrester module is a gap discharge, the impact discharge current is 15kA (10/350μs), and the working voltage is 250V. It is also possible to use a varistor lightning protection on the power line.
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