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Overvoltage And Undervoltage Protective Device With Auto-Reclosing Function, which is shorted as OUPA.When the overvoltage and the undervoltage in the line exceed the specified value, it can automatically disconnect and automatically detect the line voltage. When the voltage in the line is restored to normal, it can be automatically closed. It is mainly used for power distribution in family and shopping malls (single phase AC230V, three-phase four wire AC400V) lines as overvoltage, undervoltage, phase interruption and broken line protection.
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