Overvoltage protection device

Abstract

The invention discloses an overvoltage protection device which comprises an automatic voltage regulating device which is in a serial connection on a zero line or live line. One side of the automatic voltage regulating device is provided with a control box. A voltage transformer is arranged between the zero line and the live line. The automatic voltage regulating device comprises a protection shell and a servo motor arranged in the protection shell. The output shaft of the servo motor is connected to a screw rod into which a movable plate is embedded. The bottom of the movable plate is connected to a sliding block. The bottom of the sliding block is connected to a slide rail in a matched way. The top of the movable plate is provided with a fixed seat whose top is provided with a resistor. The resistor is movable provided with a slide sleeve. The left side of the fixed seat is connected to a spring-shaped conductive wire. The overall structure is simple, the design is reasonable, the voltage transformer can detect the change of power supply voltage in real time in working, the screw rod is driven by the servo motor to move, thus the voltage drop of the resistor is automatically adjusted to achieve stable voltage, overhigh voltage is prevented, and the overvoltage protection device has the advantages of energy saving and environmental protection, high security and convenience in use.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to an overvoltage protector. Background technique [0002] At present, in recent years, with the improvement of economic conditions, rural electricity customers have begun to purchase a large number of high-power electrical appliances such as air conditioners, electric heaters, and rice cookers. Rural migrant workers are not at home on a daily basis, and the daily load of the rural station area is relatively small. During the Spring Festival, due to a large number of migrant workers returning home for the New Year, high-power heating equipment such as air conditioners and electric heaters began to operate intensively, resulting in a sharp increase in the load of the station area. The voltage drop will be larger. In order to maintain the stability of the power supply voltage, the distribution transformer needs to increase the voltage according to the situation. However, when ...

AI Technical Summary

Problems solved by technology

Rural migrant workers are not at home on a daily basis, and the daily load of the rural station area is relatively small. During the Spring Festival, due to a large number of migrant workers returning home for the New Year, high-power heating equipment such as air conditioners and electric heaters began to operate intensively, resulting in a sharp increase in the load of the station area. The voltage drop will be larger. In order to maintain the stability of the power supply voltage, the distribution transformer needs to increase the voltage according to the situation. However, when the power demand is too small, the existing distribution transformer does not automatically reduce the voltage, so that the voltage used by users will be reduced If it is too high, it will damage the electrical appliances used by people and bring safety hazards

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