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Our INCH have installed internal over voltage protection Class Type III, if over voltage protection in house hold (external) does not work. INCH internal over voltage protection trips to try to save the connected car on the charging station. In this case is also mother board burned. But in-built over voltage protection Class Type III can not cut the whole over voltage peak, which comes from the grid, if Class Type I and Class Type II doesn’t exist in household over voltage protection system and doesn’t cut off the voltage peak till value, which can be taken over by Class II.Type II.
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Possible naming:
Class A (operated by an electrical distributor)
Class B same as Type 1 (build in main electrical cabinet)
Class C same as Type 2
Class D same as Type 3