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Lightning-protection power distribution cabinet

A technology for power distribution cabinets and lightning protection circuits, applied in electrical components, circuit devices, emergency protection circuit devices, etc., can solve the problems of small shock resistance capacity, damage to microcomputer systems, and fragile surge tolerance, so as to avoid damage. Effect

Inactive Publication Date: 2013-02-13
STATE GRID ZHEJIANG NINGBO FENGHUA POWER SUPPLY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the ensuing problem is that for the integrated circuit of the microcomputer system, the operating voltage is only a few volts, and the signal current is only in the microampere level. Compared with the previous electromagnetic protection device, the impact resistance capacity is smaller, and the surge The ability to withstand lightning strikes is relatively fragile, especially the transient impact of lightning strike overvoltage will cause serious damage to the microcomputer system. Therefore, the lightning protection problem of integrated automation and intelligent equipment such as microcomputer systems and computer networks is required to be included in the normal protection.

Method used

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Embodiment 1

[0032] figure 1 It is a schematic diagram of connection of the lightning protection power distribution cabinet provided in Embodiment 1 of the present application. figure 2 It is a schematic diagram of the internal structure of the lightning protection distribution cabinet provided in the embodiment of the present application.

[0033] figure 1 Among them, 100 is the power system, 200 is the lightning protection power distribution cabinet, and 300 is the equipment to be protected, such as figure 2 As shown, the lightning protection power distribution cabinet 200 includes: a cabinet body and a lightning protection power supply circuit 1 .

[0034] The cabinet is usually set between the equipment to be protected and the power system, so that when a lightning strike occurs, the instantaneous lightning current of the power system should be discharged to the ground first, and at the same time, the induced overvoltage will be limited to a level that the equipment can withstand t...

Embodiment 2

[0045] Because in the above-mentioned embodiment, there is only one path in the lightning protection power distribution cabinet, when the lightning protection circuit breaks down, or when the lightning protection circuit needs to be overhauled and maintained, the power to the equipment to be protected will be cut off, which will greatly affect the use of the equipment to be protected.

[0046] In order to avoid the uninterrupted power supply of the equipment to be protected due to the failure of the lightning protection circuit, or the need to overhaul and maintain the lightning protection circuit.

[0047] Such as image 3 As shown, the lightning protection power distribution cabinet 200 provided in the embodiment of the present application also includes: a direct power supply circuit 3 and a switching circuit 4, wherein:

[0048] One end of the direct power supply circuit 3 is connected to the power system 100, and the other end is connected to the device to be protected 30...

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Abstract

The application discloses a lightning-protection power distribution cabinet, comprising a cabinet body and a lightning-protection power supply circuit. The lightning-protection power supply circuit comprises a lightning protection circuit, indication equipment and an output unit, wherein the input end of the lightning protection circuit is connected with a power supply system; the output end of the lightning protection circuit is connected with the output unit, and is used for removing a lightning surge voltage from the power supply system; the lightning protection circuit internally comprises a primary discharge unit, a secondary choke unit and a third clamping unit, which are sequentially connected with one another; the indication equipment is connected with the lightning protection circuit, and is used for displaying various phases of currents and voltages of each path in the lightning protection circuit; and the output end of the output unit is connected with equipment to be protected, and is used for supplying power to the equipment to be protected. The lightning-protection power distribution cabinet utilizes the lightning-protection power supply circuit inside the cabinet body to remove the lightning surge voltage from the power supply system in a three-level manner, thus avoiding the damage on the equipment to be protected, caused by the lightning surge voltage from the power supply system.

Description

technical field [0001] The present application relates to the technical field of circuit protection, in particular to a lightning protection distribution cabinet. Background technique [0002] With the advancement of science and technology, the automation system composed of microcomputers and large-scale integrated circuit devices replaces conventional measuring and monitoring instruments, conventional control panels, central signal systems, remote control panels and conventional relay protection. Improve the level of automation and intelligence. [0003] However, the ensuing problem is that for the integrated circuit of the microcomputer system, the operating voltage is only a few volts, and the signal current is only in the microampere level. Compared with the previous electromagnetic protection device, the impact resistance capacity is smaller, and the surge The ability to withstand lightning strikes is relatively fragile, especially the transient impact of lightning str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B1/24H02H9/04
Inventor 王芳红张莹蒋宏男方旭东刘文俊
Owner STATE GRID ZHEJIANG NINGBO FENGHUA POWER SUPPLY CO LTD
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