Introduction: Self-repairing over- and under-voltage protectors are mainly used in home and shopping mall distribution lines as a protection against single-phase line over- and under-voltage caused by neutral line faults.
Self-repairing over-voltage protection has always been a red light undervoltage or over-voltage, the red light represents protection, protection is the product does not turn on, in the case of high or low voltage, the protector action breaks the low pressure The power supply directly protects the circuit board.
If the self-resetting over/under voltage protector is always on red, first check whether the measured voltage is normal. If the voltage is normal, there is a problem with the protector.
1. The voltage in the power grid is higher than the normal protection voltage value of the product or lower than the normal protection voltage value of the product.
2. The self-repairing over-voltage protection is interfered with by other electrical appliances
3. The self-reset overvoltage protector is damaged
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