CN202997486U - Circuit-type lightning-protection overvoltage protector - Google Patents
Circuit-type lightning-protection overvoltage protector Download PDFInfo
- Publication number
- CN202997486U CN202997486U CN 201220691968 CN201220691968U CN202997486U CN 202997486 U CN202997486 U CN 202997486U CN 201220691968 CN201220691968 CN 201220691968 CN 201220691968 U CN201220691968 U CN 201220691968U CN 202997486 U CN202997486 U CN 202997486U
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- CN
- China
- Prior art keywords
- striking arm
- wire clamp
- puncture wire
- insulated cable
- lightning
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- Expired - Fee Related
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Abstract
Disclosed is a circuit-type lightning-protection overvoltage protector. The utility model mainly provides a solution for the problem that the prior anti-lightning fitting has hidden safety problems and is poor in arc-striking effect. The circuit-type lightning-protection overvoltage protector is characterized in that an insulated cable (5) is connected with a second puncture clamp (6); a high-resistance body (7) and an arc striking arm (2) are sequentially fixed at the lower end of the second puncture clamp (6); a core wire of the insulated cable (5), the second puncture clamp (6), the high-resistance body (7) and the arc striking arm (2) are electrically connected in sequence; the lower end of the arc striking arm (2) extends out vertically and the end part is provided with a current collecting ball (8); a grounding plate (4) is connected with a grounding ring (12); and the exteriors of a first puncture clamp (1) and the second puncture clamp (6) are provided with insulating sheath layers (9). According to the circuit-type lightning-protection overvoltage protector, the high-resistance body (7) is used to isolate the arc striking arm from the outside, the safety is improved, charge accumulated in the arc striking arm can be quickly released in the event of lightning, and the safety of the insulated cable and terminal equipment is ensured.
Description
Technical field
The utility model relates to a kind of electric armour clamp, is specifically related to a kind of line type lightning-protection overvoltage protector.
Background technology
in electric power system, insulated cable generally is used when the built on stilts conveying of electric power, thing followed insulated cable is happened occasionally by the phenomenon of lightning-caused breaking, when direct lightning strike or lightning induced voltage act on insulated cable, at first lightning overvoltage punctures the insulating barrier of insulated cable, and then cause insulator arc-over, breakdown insulating barrier is Pinhole-shaped, the obstruction that the short arc current of continuous frequency is insulated on every side, the arc root can only be in pin hole place's burning, insulated cable will be by neat blowing within the extremely short time, thereby cause the disconnection of electrical network, affect the normal operation of power transmission network.Generation for fear of lightning-caused breaking, lightning protection hardware generally all is installed on insulated cable, the kind of existing lightning protection hardware is a lot, but the lightning protection principle is basic identical, all to utilize between striking arm and ground plate to consist of discharge loop, discharge when thunderbolt, to prevent that insulated cable is by lightning-caused breaking.The striking arm of this lightning protection hardware is communicated with cable core and is exposed, with high-tension electricity, has potential safety hazard due to the striking arm.In addition, due to the reasons in structure of striking arm and ground plate, the striking effect is relatively poor, and ground plate lacks the sensitiveness to the discharge of striking arm, and a large amount of electric charges that produce when causing thunderbolt still can enter into terminal equipment along insulated cable, causes terminal equipment to damage.
The utility model content
There are potential safety hazard and the relatively poor deficiency of striking effect in order to overcome existing lightning protection hardware; the utility model provides a kind of line type lightning-protection overvoltage protector; this line type lightning-protection overvoltage protector adopts the high resistance body that the striking arm is isolated from the outside; improved fail safe; when lightning strikes; the electric charge that the striking arm gathers can promptly discharge, and has guaranteed the safety of insulated cable and terminal equipment.
the technical solution of the utility model is: this line type lightning-protection overvoltage protector comprises the first puncture wire clamp, striking arm and insulator, the upper end of insulator is connected with insulated cable by the first puncture wire clamp, the lower end of insulator is provided with ground plate, be connected with the second puncture wire clamp on insulated cable, the lower end of the second puncture wire clamp is fixed with high resistance body and striking arm successively, the heart yearn of insulated cable, the second puncture wire clamp, high resistance body and striking arm are electrically connected to successively, vertically stretch out the lower end of striking arm and the end is provided with the current collection ball, be connected with ground loop on ground plate, described ground loop be positioned at the current collection ball under, being centered close on vertical center line by the ground loop center of circle of current collection ball, described the first puncture wire clamp and the second puncture wire clamp outside are equipped with the insulation sheath.
Described high resistance body is comprised of insulating sleeve and metal oxide resistance, and a plurality of metal oxide resistances overlay in insulating sleeve; Be positioned at topmost and metal oxide resistance bottom electrically contacts with the second puncture wire clamp and striking arm respectively.
The utlity model has following beneficial effect: owing to taking such scheme, when thunderbolt, voltage is higher, the a large amount of electric charges that gather on the striking arm are focused at the outer surface of current collection ball, ground loop and current collection ball are equidistant, form the multiple spot discharge between ground loop and current collection ball, discharge discharges rapidly, has guaranteed the safety of insulated cable and terminal equipment.Simultaneously, after voltage drop, the high resistance body recovers high resistance very soon, and the electric arc between ground loop and current collection ball is extinguished rapidly; be difficult for causing that the protection switch tripping operation of circuit causes power failure, under normal operating condition, isolate by the high resistance body; avoid leaking electricity, eliminated potential safety hazard.
Description of drawings
Accompanying drawing 1 is structural representation of the present utility model.
Accompanying drawing 2 is structural representations of ground loop 12 in Fig. 1.
1-the first puncture wire clamp in figure, 2-striking arm, 3-insulator, 4-ground plate, 5-insulated cable, 6-the second puncture wire clamp, 7-high resistance body, 8-current collection ball, the 9-sheath that insulate, 10-insulating sleeve, 11-metal oxide resistance, 12-ground loop.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
by Fig. 1 in conjunction with shown in Figure 2, this line type lightning-protection overvoltage protector comprises the first puncture wire clamp 1, striking arm 2 and insulator 3, the upper end of insulator 3 is connected with insulated cable 5 by the first puncture wire clamp 1, the lower end of insulator 3 is provided with ground plate 4, be connected with the second puncture wire clamp 6 on insulated cable 5, the lower end of the second puncture wire clamp 6 is fixed with high resistance body 7 and striking arm 2 successively, the heart yearn of insulated cable 5, the second puncture wire clamp 6, high resistance body 7 and striking arm 2 are electrically connected to successively, vertically stretch out the lower end of striking arm 2 and the end is provided with current collection ball 8, be connected with ground loop 12 on ground plate 4, described ground loop 12 be positioned at current collection ball 8 under, being centered close on vertical center line by ground loop 12 centers of circle of current collection ball 8, described the first puncture wire clamp 1 and the second puncture wire clamp 6 outsides are equipped with insulation sheath 9.Owing to taking such scheme, when thunderbolt, voltage is higher, the a large amount of electric charges that gather on striking arm 2 are focused at the outer surface of current collection ball 8, ground loop 12 is equidistant with current collection ball 8, form the multiple spot discharge between ground loop 12 and current collection ball 8, discharge discharges rapidly, has guaranteed the safety of insulated cable and terminal equipment.Simultaneously; after voltage drop, high resistance body 7 recovers high resistance very soon; electric arc between ground loop 12 and current collection ball 8 is extinguished rapidly; be difficult for causing that the protection switch tripping operation of circuit causes power failure; under normal operating condition; by 7 isolation of high resistance body, avoid leaking electricity, eliminated potential safety hazard.
Described high resistance body 7 is comprised of insulating sleeve 10 and metal oxide resistance 11, and a plurality of metal oxide resistances 11 overlay in insulating sleeve 10; Be positioned at topmost and metal oxide resistance 11 bottom electrically contacts with the second puncture wire clamp 6 and striking arm 2 respectively.A plurality of metal oxide resistances 11 stack the higher resistance of rear formation, do not affect simultaneously that under high voltage, electric charge gathers on striking arm 2, and after lower voltage, metal oxide resistance 11 can recover high resistive very soon.
Claims (2)
1. line type lightning-protection overvoltage protector, comprise the first puncture wire clamp (1), striking arm (2) and insulator (3), the upper end of insulator (3) is connected with insulated cable (5) by the first puncture wire clamp (1), the lower end of insulator (3) is provided with ground plate (4), it is characterized in that: be connected with the second puncture wire clamp (6) on insulated cable (5), the lower end of the second puncture wire clamp (6) is fixed with high resistance body (7) and striking arm (2) successively, the heart yearn of insulated cable (5), the second puncture wire clamp (6), high resistance body (7) and striking arm (2) are electrically connected to successively, vertically stretch out the lower end of striking arm (2) and the end is provided with current collection ball (8), be connected with ground loop (12) on ground plate (4), described ground loop (12) be positioned at current collection ball (8) under, being centered close on vertical center line by ground loop (12) center of circle of current collection ball (8), described the first puncture wire clamp (1) and the second puncture wire clamp (6) outside are equipped with insulation sheath (9).
2. line type lightning-protection overvoltage protector according to claim 1, it is characterized in that: described high resistance body (7) is comprised of insulating sleeve (10) and metal oxide resistance (11), and a plurality of metal oxide resistances (11) overlay in insulating sleeve (10); Be positioned at topmost and metal oxide resistance (11) bottom electrically contacts with the second puncture wire clamp (6) and striking arm (2) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220691968 CN202997486U (en) | 2012-12-14 | 2012-12-14 | Circuit-type lightning-protection overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220691968 CN202997486U (en) | 2012-12-14 | 2012-12-14 | Circuit-type lightning-protection overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997486U true CN202997486U (en) | 2013-06-12 |
Family
ID=48568618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220691968 Expired - Fee Related CN202997486U (en) | 2012-12-14 | 2012-12-14 | Circuit-type lightning-protection overvoltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202997486U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258450A (en) * | 2021-05-12 | 2021-08-13 | 广东景呈电力设备有限公司 | Smart power grids is with thunderbolt limiter and transformer platform frame |
-
2012
- 2012-12-14 CN CN 201220691968 patent/CN202997486U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258450A (en) * | 2021-05-12 | 2021-08-13 | 广东景呈电力设备有限公司 | Smart power grids is with thunderbolt limiter and transformer platform frame |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20171214 |