CN202997329U - Lightning-protection power distribution cabinet - Google Patents

Lightning-protection power distribution cabinet Download PDF

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Publication number
CN202997329U
CN202997329U CN 201220645349 CN201220645349U CN202997329U CN 202997329 U CN202997329 U CN 202997329U CN 201220645349 CN201220645349 CN 201220645349 CN 201220645349 U CN201220645349 U CN 201220645349U CN 202997329 U CN202997329 U CN 202997329U
Authority
CN
China
Prior art keywords
lightning protection
lightning
power supply
equipment
supply circuits
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220645349
Other languages
Chinese (zh)
Inventor
王芳红
张莹
蒋宏男
方旭东
刘文俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fenghua power supply bureau
State Grid Corp of China SGCC
Original Assignee
Fenghua power supply bureau
State Grid Corp of China SGCC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fenghua power supply bureau, State Grid Corp of China SGCC filed Critical Fenghua power supply bureau
Priority to CN 201220645349 priority Critical patent/CN202997329U/en
Application granted granted Critical
Publication of CN202997329U publication Critical patent/CN202997329U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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 arranged inside the cabinet body. 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; the lightning protection circuit is used for eliminating lightning surge voltage entered 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 currents and voltages, in various phases, of each path in the lightning protection circuit; the output end of the output unit is connected with equipment to be protected; and the output unit 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 entered from the power supply system in a three-level manner, thus preventing the damages on the equipment to be protected, caused by the lightning surge voltage from the power supply system.

Description

The lightning protection power distribution cabinet
Technical field
The application relates to the circuit protection technical field, particularly relates to a kind of lightning protection power distribution cabinet.
Background technology
Along with the progress of science and technology, by the automated system of microcomputer and large scale integrated circuit installation composition, replace conventional measurement and supervisory instrument, conventional control flow, central signal system, telemechanical screen and conventional relaying protection.Automation and intelligent level have been improved.
But; the problem that thereupon occurs is; integrated circuit for microsystem; working voltage only has the three ten-day period of hot season, signal code only is microampere order; comparing in the past electromagnetic type protective device, to possess shock-resistant capacity little; tolerance to surge is more fragile, and particularly the transient state impact of Lightning Over-voltage can cause microsystem badly damaged, and therefore the anti-lightning strike problem of the comprehensive automations such as microsystem, computer network, intelligent equipment is required to have included in normal protection at present.
The utility model content
In view of this, the embodiment of the present application provides a kind of lightning protection power distribution cabinet, to avoid thunder and lightning, equipment to be protected is caused damage.
To achieve these goals, the technical scheme that provides of the embodiment of the present application is as follows:
A kind of lightning protection power distribution cabinet, the lightning surge voltage transmission that is used for preventing from being entered by power-supply system comprise cabinet and the lightning protection power supply circuits that are arranged in described cabinet to equipment to be protected,
Described lightning protection power supply circuits comprise:
Input is connected with power-supply system, and output is connected with output unit, is used for eliminating the lightning protection circuit to the lightning surge voltage that is entered by power-supply system;
Comprise the first order vent unit that is connected successively, second level choke unit and third level clamper unit in described lightning protection circuit;
Be connected with described lightning protection circuit, be used for the indicating equipment that each phase current of every road, voltage in described lightning protection circuit are shown;
Output is connected with equipment to be protected, is used for the output unit of powering to equipment to be protected.
Preferably, in this lightning protection power distribution cabinet that the embodiment of the present application provides, the ground wire of described lightning protection circuit is connected with the ground wire of equipment to be protected.
Preferably, in this lightning protection power distribution cabinet that the embodiment of the present application provides, release response time of element of the described first order is 25ns.
Preferably, in this lightning protection power distribution cabinet that the embodiment of the present application provides, further comprise: straight-through power supply circuits and commutation circuit;
One end of described straight-through power supply circuits is connected with described power-supply system, and the other end is connected with equipment to be protected;
Described commutation circuit is connected with described lightning protection power supply circuits, straight-through power supply circuits respectively, when lightning protection, with the conducting of described lightning protection power supply circuits, and described straight-through power supply circuits is disconnected; When few thunderstorm season, lightning protection circuit fault, maintenance or maintenance, with described straight-through power supply circuits conducting, and with described lightning protection power supply circuits disconnection.
By above technical scheme as seen; this lightning protection power distribution cabinet that the embodiment of the present application provides; utilization is arranged on the lightning protection supply access in cabinet; the lightning surge voltage that will be entered by power-supply system carries out three grades of eliminations through first order vent unit, second level choke unit and third level clamper unit, and then can avoid lightning surge voltage by power-supply system, equipment to be protected to be caused damage.
In addition; also be provided with straight-through power supply circuits and commutation circuit in this lightning protection power distribution cabinet; when few thunderstorm season (for example winter), lightning protection circuit fault, maintenance or maintenance; commutation circuit can will lead directly to the power supply circuits conducting; and the lightning protection power supply circuits are disconnected, and then can realize not interrupting the power supply of equipment to be protected when maintenance.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, the accompanying drawing that the following describes is only some embodiment that put down in writing in the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The connection diagram of the lightning protection power distribution cabinet that Fig. 1 provides for the embodiment of the present application one;
The structural representation of the lightning protection power distribution cabinet that Fig. 2 provides for the embodiment of the present application one;
The structural representation of the lightning protection power distribution cabinet that Fig. 3 provides for the embodiment of the present application two.
Embodiment
In order to make those skilled in the art person understand better technical scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the application's part embodiment, rather than whole embodiment.Based on the embodiment in the application, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all should belong to the scope of the application's protection.
At present, lightning surge voltage mainly contains following several mode of infection:
1, the intrusion of power-supply system.Thunderbolt is directly hit near power line or power line, induces overvoltage on power line, imports power-supply system into;
2, the intrusion of signal system.Lightning induced voltage is imported into by holding wire;
3, the induction of external electromagnetic field.Thunder and lightning hits arrester or building, and when lightning current flowed into the earth along downlead, the space produced the electromagnetic field of alternation around, induces overvoltage on power line or holding wire;
4, earthy counterattack.When lightning current flows into the earth, due to the existence of earth resistance, can produce larger pressure drop, earth potential be raised, reverse breakdown equipment; Or thundercloud goes out opposite charges at geoinduction, if when thundercloud disappears, large electric charge on the ground can be wandering to infinite point, and earth potential is raise, and produces counterattack.
As seen, the superpotential protection of lightning surge generally includes: the protection of the protection of power-supply system, the anti-electromagnetic shielding of signal system, the joint grounding body of grounding system.
But because power-supply system is invaded the most common.Therefore, when lightning protection, must be equipped with the lightning protection power distribution cabinet.
Embodiment one:
The connection diagram of the lightning protection power distribution cabinet that Fig. 1 provides for the embodiment of the present application one.The internal structure schematic diagram of the lightning protection power distribution cabinet that Fig. 2 provides for the embodiment of the present application.
In Fig. 1,100 is power-supply system, and 200 are the lightning protection power distribution cabinet, and 300 is equipment to be protected, and as shown in Figure 2, this lightning protection power distribution cabinet 200 comprises: cabinet and lightning protection power supply circuits.
Cabinet is arranged between equipment to be protected and power-supply system usually, and when thunderbolt occurring, at first this release the lightning current of power system transient into ground, simultaneously induction overvoltage is limited in the level that equipment can bear, and avoids superpotential impact like this.
As shown in Figure 2, the lightning protection power supply circuits comprise: lightning protection circuit 11, indicating circuit 12 and output circuit 13, wherein,
The input of described lightning protection circuit 11 is connected with power-supply system 100, and the output of described lightning protection circuit 11 is connected with output circuit 13, is used for eliminating the lightning surge voltage to being entered by power-supply system.
And with reference to shown in Figure 2, comprise in this lightning protection circuit: first order leadage circuit, second level choked flow circuit and third level clamp circuit, wherein, first order leadage circuit, second level choked flow circuit and third level clamp circuit three are electrically connected to successively, to realize that the thunderbolt voltage surge is carried out three grades of protection.
When thunder and lightning is protected, preset the voltage threshold in first order leadage circuit, when external voltage surpasses this voltage threshold, the element of releasing in first order leadage circuit can be in 25ns the instantaneous thunder-strike current of releasing over the ground; The circuit of second level choked flow simultaneously is used for stoping thunder-strike current to continue to pass through; Last third level clamper unit is used for limiting too high lightning surge voltage to be passed through, and output voltage is clamped in safety value.
The output of described output circuit 13 is connected with equipment to be protected 300, is used for powering to equipment to be protected 300.In addition, these lightning protection power supply circuits can also normal power supply when carrying out lightning Protection.
In addition, for the handled easily personnel understand the operating state in lightning protection circuit, can also arrange in this lightning protection circuit: indicating circuit 12,
Indicating circuit 12 is connected with lightning protection circuit 11, is used for each phase current of every road, voltage in described lightning protection circuit are shown.
In order to increase the lightning protection properties of this lightning protection power distribution cabinet; the ground wire of lightning protection circuit can also be connected with system's ground wire of equipment to be protected; namely make the ground wire of lightning protection circuit be connected with system's ground wire implementation equipotential of equipment to be protected, the electric power system of all equipments to be protected is on the same foundation current potential.
This lightning protection power distribution cabinet that the embodiment of the present application provides; utilization is arranged on the lightning protection supply access in cabinet; the lightning surge voltage that will be entered by power-supply system carries out three grades of eliminations through first order vent unit, second level choke unit and third level clamper unit, and then can avoid lightning surge voltage by power-supply system, equipment to be protected to be caused damage.
Embodiment two:
In above-described embodiment, only be provided with a path in the lightning protection power distribution cabinet, work as like this lightning protection circuit and break down, perhaps need lightning protection circuit is overhauled, when maintaining, just makes the equipment to be protected outage, this will affect the use of equipment to be protected greatly.
For fear of because lightning protection circuit breaks down, perhaps need lightning protection circuit is overhauled, maintains and makes equipment to be protected not cut off the power supply.
As shown in Figure 3, this lightning protection power distribution cabinet 200 that the embodiment of the present application provides also comprises: straight-through power supply circuits 3 and commutation circuit 4, wherein:
One end of described straight-through power supply circuits 3 is connected with described power-supply system 100, and the other end is connected with equipment to be protected 300;
Described commutation circuit 4 is connected with described lightning protection power supply circuits, straight-through power supply circuits 3 respectively, is used for when lightning protection, with the conducting of described lightning protection power supply circuits, and described straight-through power supply circuits 3 is disconnected; When few thunderstorm season (for example winter), lightning protection circuit fault, maintenance or maintenance, with described straight-through power supply circuits 3 conductings, and with described lightning protection power supply circuits disconnection.
By above scheme, this lightning protection power distribution cabinet can realize not interrupting the power supply of equipment to be protected when maintenance.
Owing to also being provided with straight-through power supply circuits and commutation circuit in this lightning protection power distribution cabinet; so when lacking thunderstorm season (for example winter), lightning protection circuit fault, maintenance or maintaining; commutation circuit can will lead directly to the power supply circuits conducting; and the lightning protection power supply circuits are disconnected, and then can realize not interrupting the power supply of equipment to be protected when maintenance.
The above is only the application's preferred implementation, makes those skilled in the art can understand or realize the application.Multiple modification to these embodiment will be apparent to one skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the application's spirit or scope, realization in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (4)

1. a lightning protection power distribution cabinet,, is characterized in that to equipment to be protected for the lightning surge voltage transmission that prevents from being entered by power-supply system, comprise cabinet and be arranged on the interior lightning protection power supply circuits of described cabinet,
Described lightning protection power supply circuits comprise:
Input is connected with power-supply system, and output is connected with output unit, be used for to eliminate the lightning protection circuit of the lightning surge voltage that entered by power-supply system;
Comprise the first order vent unit that is connected successively, second level choke unit and third level clamper unit in described lightning protection circuit;
Be connected with described lightning protection circuit, be used for the indicating equipment that each phase current of every road, voltage in described lightning protection circuit are shown;
Output is connected with equipment to be protected, is used for the output unit of powering to equipment to be protected.
2. power distribution cabinet according to claim 1, is characterized in that, the ground wire of described lightning protection circuit is connected with the ground wire of equipment to be protected.
3. power distribution cabinet according to claim 2, is characterized in that, release response time of element of the described first order is 25ns.
4. power distribution cabinet according to claim 3, is characterized in that, further comprises: straight-through power supply circuits and commutation circuit;
One end of described straight-through power supply circuits is connected with described power-supply system, and the other end is connected with equipment to be protected;
Described commutation circuit is connected with described lightning protection power supply circuits, straight-through power supply circuits respectively, when lightning protection, with the conducting of described lightning protection power supply circuits, and described straight-through power supply circuits is disconnected; When few thunderstorm season, lightning protection circuit fault, maintenance or maintenance, with described straight-through power supply circuits conducting, and with described lightning protection power supply circuits disconnection.
CN 201220645349 2012-11-28 2012-11-28 Lightning-protection power distribution cabinet Expired - Fee Related CN202997329U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220645349 CN202997329U (en) 2012-11-28 2012-11-28 Lightning-protection power distribution cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220645349 CN202997329U (en) 2012-11-28 2012-11-28 Lightning-protection power distribution cabinet

Publications (1)

Publication Number Publication Date
CN202997329U true CN202997329U (en) 2013-06-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220645349 Expired - Fee Related CN202997329U (en) 2012-11-28 2012-11-28 Lightning-protection power distribution cabinet

Country Status (1)

Country Link
CN (1) CN202997329U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102931592A (en) * 2012-11-28 2013-02-13 奉化市供电局 Lightning-protection power distribution cabinet
CN107147075A (en) * 2017-05-15 2017-09-08 安徽亿纵电子科技有限公司 A kind of lightning protection monitoring system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102931592A (en) * 2012-11-28 2013-02-13 奉化市供电局 Lightning-protection power distribution cabinet
CN107147075A (en) * 2017-05-15 2017-09-08 安徽亿纵电子科技有限公司 A kind of lightning protection monitoring system

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130612

Termination date: 20201128