The voltage stabilizer heats and smokes for no reason! ! ! Urgent! ! !

If the causes of overload, smoke and fever can be eliminated, it is basically a quality problem. If the voltage of the voltage regulator is too low, the undervoltage lamp on its panel will light up. Generally, as long as it is lower than 160V, the voltage regulator will not work. It's not the low pressure, heat and smoke. In addition, the 5KVA single-phase voltage regulator uses DZ47 miniature circuit breaker to protect overcurrent. I think it's smoking to keep warm, maybe aluminum wire is used inside.