Peak Inverse Voltage: Inductive components, transformers, etc. have a characteristic that when a voltage is applied to a circuit or a voltage is removed, the unit generates a counter electromotive force to prevent this voltage from changing. Then when a voltage is applied to the inductive component, it generates a counter electromotive force to prevent the establishment of this voltage, but the energy of the power supply voltage is constantly flowing, so this back electromotive force only acts as a voltage damping, which has little effect on the circuit. However, the situation is different when the power is turned off. When the power is turned off, there is no blocking of the back electromotive force in the circuit. This voltage is the anti-peak voltage, which is 9 times of the normal voltage. Although its current is small, the voltage is high, causing an impact on the equipment.
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