Power protection device
A power supply protection and drive circuit technology, applied in the direction of circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc., can solve problems such as accidents, equipment work impact, equipment damage, etc., to prevent damage, safety and reliability Work and prevent damage to electrical equipment
Inactive Publication Date: 2018-06-22
河南北瑞电子科技有限公司
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Problems solved by technology
[0002] For most electrical equipment, the voltage range of the working power supply is strictly limited. Overvoltage or undervoltage will seriously affect the operation of the equipment, cause equipment damage, and even cause accidents in serious cases. Therefore, real-time monitoring of electrical equipment It is very necessary to monitor and protect the power supply to ensure the normal operation of electrical equipment
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[0011] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0012] Such as figure 1 As shown, the present invention provides a power protection device, including a voltage detection circuit, a drive circuit and a delay circuit, the voltage detection circuit is used to detect the working voltage of the electrical equipment, and the drive circuit is used to drive the relay to work, so that the When overvoltage or undervoltage occurs, the power supply of the electrical equipment is disconnected in time, and the delay circuit is used to delay the start when the power supp...
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The invention discloses a power protection device. The power protection device comprises a voltage detection circuit, a driving circuit and a time delay circuit, wherein the voltage detection circuitis used for detecting a working voltage of power utilization equipment, the driving circuit is used for driving a relay to work so that a power supply of the power utilization equipment is timely cutoff when overvoltage or undervoltage occurs, the time delay circuit is used for performing time delay starting when power supply is restored, the voltage detection circuit comprises four NAND gates, afirst potentiometer and a second potentiometer, an output end of the voltage detection circuit is connected with the driving circuit and the time delay circuit, the driving circuit comprises a seventh NAND gate, an eighth NAND gate and a first triode, and the time delay circuit comprises a fourth NAND gate and a fifth NAND gate. By the power protection device, the power supply of the power utilization equipment can be timely cut off when overvoltage and undervoltage occurs in the power supply of the power utilization equipment, automatic energization is performed when power supply is restored, and the equipment is enabled to safely and reliably work.
Description
technical field [0001] The invention relates to the technical field of electric equipment protection, in particular to a power supply protection device. Background technique [0002] For most electrical equipment, the voltage range of the working power supply is strictly limited. Overvoltage or undervoltage will seriously affect the operation of the equipment, cause equipment damage, and even cause accidents in serious cases. Therefore, real-time monitoring of electrical equipment It is very necessary to monitor and protect the power supply to ensure the normal operation of the electrical equipment. Contents of the invention [0003] The purpose of the present invention is to provide an industrial power supply protection device, which can disconnect the power supply of the electrical equipment in time when the power supply of the electrical equipment is overvoltage or undervoltage, and automatically power on when the power supply is restored, so as to ensure the protection...
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IPC IPC(8): H02H3/20H02H3/24H03K17/28
CPCH02H3/207H02H3/24H03K17/28
Inventor 常胜
Owner 河南北瑞电子科技有限公司