CN201690227U - Disengage electrified maintenance type over-voltage protection apparatus - Google Patents
Disengage electrified maintenance type over-voltage protection apparatus Download PDFInfo
- Publication number
- CN201690227U CN201690227U CN2010202138969U CN201020213896U CN201690227U CN 201690227 U CN201690227 U CN 201690227U CN 2010202138969 U CN2010202138969 U CN 2010202138969U CN 201020213896 U CN201020213896 U CN 201020213896U CN 201690227 U CN201690227 U CN 201690227U
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- disengage
- lightning arrester
- utility
- moving contact
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Abstract
The utility model relates to a disengage electrified maintenance type over-voltage protection apparatus, which comprises an insulator and a lightning arrestor, characterized in that, the insulator is arranged at an upper end of an upper moving contact by an upper connecting terminal and an upper support, a lower end of the lightning arrestor is connected with a disengage apparatus, a lower end of the lightning arrestor is connected with a lower moving contact by a throwing and demountable falling type mechanism. The utility model has advantages that a multiple-element combination is adopted, the structure is advanced, the utility model can be detected, maintained and changed under the normal running electrified condition; the lightning arrestor is easy to age after operating for long time, when the service life is achieved, the disengage apparatus operates to generate a visible mark; the utility model adopts the double-insulation for the ground, so that the operation reliability can be improved; the disengage operation is sensitive and the reliability is high.
Description
Technical field
The utility model relates to a kind of overvoltage protection device that is used for power distribution network and transformer station, can be used for the overvoltage protection of power distribution network and transformer station, is mainly used in the 10kV power transmission and transformation system, belongs to the overvoltage protection technical field.
Background technology
Overvoltage protection device with its be not affected by the external environment, safe and reliable to operation, protective feature is good etc., and absolute predominance is widely used in 10kV and above voltage domain, is used to protect power distribution network and power transmission and transformation system to avoid superpotential infringement.10kV power transmission and transformation system overvoltage adopts single-phase metal oxide arrester at present, after operation a period of time, if it is ineffective that aging lightning arrester takes place.At this moment do not have visible mark, can't determine whether to change.During the lightning arrester that need more renew, has only the power failure of operating a switch of live line working or circuit.Adopt single-phase insulation against ground, do not have dual insulation protection.Generally speaking, the shortcoming of existing overvoltage protection device is: can not chargedly detect, keep in repair and change; When lightning arrester breaks down, no visible mark; Single-phase insulation against ground, operational reliability reduces.
Summary of the invention
The purpose of this utility model provides a kind of metal oxide overvoltage protection of the visible fault target of having of a kind of hotline maintenance.
In order to achieve the above object; the technical solution of the utility model has provided a kind of disengaging hotline maintenance formula overvoltage protection; comprise insulator and lightning arrester; it is characterized in that; insulator is located at the upper end of moving contact by upper connecting terminal and upper bracket; the lower end dockingundocking device of lightning arrester, the lower end of lightning arrester by can throw, dismountable drop type mechanism links to each other with lower moving contact.
Describedly throw, dismountable drop type mechanism comprises shroud ring, an end and the described lightning arrester of shroud ring fix, the other end is fixed on the lower carriage, the contact shell fragment is connected on the lower moving contact, and is located on the lower carriage with lower moving contact.
The utility model is that lightning arrester and insulator are contained on the device that can freely fall, and realizes freely cut-offfing.
The utility model has the advantages that: the combination of employing multicomponent, structure advanced person can detect, keep in repair and change when the charged situation of normal operation; Behind the lightning arrester long-play, aging easily, when reaching the life-span, the disconnector action produces visible mark; Adopt two insulation over the ground, improve reliability of operation; Disengaging is active in one's movements, the reliability height.
Description of drawings
A kind of structural representation that breaks away from hotline maintenance formula overvoltage protection that Fig. 1 provides for the utility model.
Embodiment
Specify the utility model below in conjunction with embodiment.
Embodiment
As shown in Figure 1; for a kind of disengaging hotline maintenance formula overvoltage protection that the utility model provides, form 10 by insulator 1, upper connecting terminal combination 2, upper bracket 3, last moving contact 4, lightning arrester 5, shroud ring 6, disconnector 7, contact shell fragment 8, lower carriage 9, lower moving contact.
Break away from hotline maintenance formula overvoltage protection and be can throw being installed in cleverly after lightning arrester 5 repackings, in the drop type mechanism of detachable; reach under the situation of not cutting off the power supply; can detect, keep in repair and change lightning arrester easily by the insulation joystick of operating a switch; not only guaranteed the unimpeded of circuit; and electric power maintenance personnel's working strength and time have been reduced widely; be particularly suitable for the place that should not have a power failure, as communication, airport, station, hospital, bustling business district etc.
Hotline maintenance formula overvoltage protection device has increased disconnector 7, and lightning arrester 5 was struck by lightning behind the electricity, if when lightning arrester 5 outward appearances do not have damage, artificial to examine be difficultly to find that it is very time-consuming that this repairs the trouble-shooting point with observing.The characteristics that have hotline maintenance on the other hand owing to still is connected with electrical network, during the lightning arrester 5 that more renews or live line working, or circuit powers failure of should operating a switch, more changes jobs to reparation and to cause very burden after lightning arrester 5 faults, have also delayed the power system restoration time.
When the disengaging hotline maintenance formula overvoltage protection that the utility model provides breaks down; utilize the power frequency short circuit current by disconnector 7 actions; disconnector 7 earth terminals are thrown off automatically; lightning-arrest 5 devices turn over; out of service preventing that accident from further enlarging, and be easy to the attendant and in time find to safeguard and change.This disengaging hotline maintenance formula overvoltage protection has adopted state-of-the-art in the world at present heat explosion type disconnector, has quick action, and the operating current scope is wide, can tolerate the advantage of rated current impact and operating duty again.
The metal oxide resistance that lightning arrester 5 adopts, has excellent non-linear volt-ampere characteristic, during work, when atmospheric over-voltage or switching overvoltage appear in system, metal oxide resistance presents low resistance, with system's overvoltage Limiting in lower level, thereby protected power equipment reliably; When system normally moved, metal oxide resistance presented high resistance, and lightning arrester is only by the microampere order electric current, and system isolates with ground, and the assurance system normally moves.
Claims (2)
1. one kind breaks away from hotline maintenance formula overvoltage protection; comprise insulator (1) and lightning arrester (5); it is characterized in that; insulator (1) is located at the upper end of moving contact (4) by upper connecting terminal (2) and upper bracket (3); the lower end dockingundocking device (7) of lightning arrester (5), the lower end of lightning arrester (5) by can throw, dismountable drop type mechanism links to each other with lower moving contact (10).
2. a kind of disengaging hotline maintenance formula overvoltage protection as claimed in claim 1; it is characterized in that; describedly throw, dismountable drop type mechanism comprises shroud ring (6); one end of shroud ring (6) and described lightning arrester (5) fix; the other end is fixed on the lower carriage (9); contact shell fragment (8) is connected on the lower moving contact (10), and is located on the lower carriage (9) with lower moving contact (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202138969U CN201690227U (en) | 2010-06-02 | 2010-06-02 | Disengage electrified maintenance type over-voltage protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202138969U CN201690227U (en) | 2010-06-02 | 2010-06-02 | Disengage electrified maintenance type over-voltage protection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201690227U true CN201690227U (en) | 2010-12-29 |
Family
ID=43378505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202138969U Expired - Lifetime CN201690227U (en) | 2010-06-02 | 2010-06-02 | Disengage electrified maintenance type over-voltage protection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201690227U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709012A (en) * | 2012-06-25 | 2012-10-03 | 虞城县供电有限责任公司 | Detachable arrester |
-
2010
- 2010-06-02 CN CN2010202138969U patent/CN201690227U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709012A (en) * | 2012-06-25 | 2012-10-03 | 虞城县供电有限责任公司 | Detachable arrester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101229 |
|
| CX01 | Expiry of patent term |