CN201466676U - Secondary grounding protector of electric power voltage transformer - Google Patents
Secondary grounding protector of electric power voltage transformer Download PDFInfo
- Publication number
- CN201466676U CN201466676U CN2009200473461U CN200920047346U CN201466676U CN 201466676 U CN201466676 U CN 201466676U CN 2009200473461 U CN2009200473461 U CN 2009200473461U CN 200920047346 U CN200920047346 U CN 200920047346U CN 201466676 U CN201466676 U CN 201466676U
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- Prior art keywords
- electrode
- arrester
- base
- voltage
- protector
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- Expired - Lifetime
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Abstract
The utility model relates to a secondary grounding protector of an electric power voltage transformer, which comprises a base and a protector connected on the base, wherein a wiring terminal which is used for being connected with a conducting wire is arranged on the base, the protector comprises an insulation casing and an electric discharge device arranged in the insulation casing, the insulation casing is provided with a first electrode and a second electrode, the electric discharge device is electrically connected between the first electrode and the second electrode, the first electrode and the second electrode are respectively in socket joint in jacks arranged on the base correspondingly, and an overcurrent overtemperature protection device which is used for protecting the electric discharge device is also electrically connected between the second electrode and the electric discharge device. Therefore, the electric discharge device in the utility model can effectively avoid damage caused by the existence of abnormal surge current and/or power-frequency current so as to enhance the service life of the electric discharge device and effectively avoid relevant relay protection misoperation accidents caused by the damage of elements. In addition, by adopting the technical scheme, the flow capacity can reach 25kA, and the residual voltage is smaller than or equal to 1kv.
Description
Technical field
The utility model relates to a kind of electric protective device, relates in particular to a kind of device that is used for voltage of power instrument transformer second protection.
Background technology
The atmospheric over-voltage that thunder and lightning causes will produce serious harm to the building of electric equipment and transformer station, therefore, in electric substation and high/low pressure transmission line, must take effective anti-overvoltage measure, to guarantee the safety of electric equipment.Operating experience shows, the lightning protection measures that is adopted in the current electric substation (outside lightning-arrest) is reliable, but, along with development of modern science and technology, the increase of power network capacity, the raising of electric pressure, the demand of automation level, increasing microelectronic device extensive use in transformer station, the microelectronic device that it relied on, because of the accident rate that damaged by lightning impulse significantly rises, cause the economic loss that is difficult to estimate.Take the measure of effective lightning protection overvoltage protection at developing, power transformation low pressure automated system, the operation of safeguards system normal reliable guarantees the fail safe of power supply, and it is particularly important that neutral point protection seems.
The power inductor neutral point generally adopts mica-sheet insulation medium discharge gap to constitute in the prior art, as described in Chinese utility model patent 200520000584.9, there is following technical problem in this class discharging gap: (1) this discharging gap adopts the lightning-arrest sub-double-screw bolt mounting means of tradition, and maintenance is inconvenient; (2) the discharging gap failure state can't be indicated, and does not have visuality; (3) install, replace inconvenient; (4) not that the standard guide rail is installed, inharmonious with other voltage electrical equipment; (5) residual voltage height, and do not have stability; (6) discharging gap blow-by etc.
In addition; an other class overvoltage protection also appears in the prior art; be as described in 200510065790.2 the Chinese patent as application number; this overvoltage protection has solved the technical problem that Chinese utility model patent 200520000584.9 described discharging gaps exist substantially; but; this device does not possess the function of arrester being carried out overcurrent protection; when having unusual surge current in the circuit; can not in time cut off circuit; thereby cause arrester to damage; reduce the useful life of this arrester, caused the waste of resource.
The utility model content
The utility model provides a kind of voltage of power instrument transformer secondary earth leakage protector at the deficiencies in the prior art, and this device possesses simultaneously arrester is carried out overvoltage and overcurrent protection, thereby has improved effectively useful life of the present utility model.
For realizing above technical purpose, the utility model will be taked following technical scheme:
A kind of voltage of power instrument transformer secondary earth leakage protector; comprise base and be connected protector on the base; be provided for connecting the binding post of lead on the described base; described protector comprises an insulation crust and places the interior arrester of this insulation crust; and insulation crust is provided with first electrode and second electrode; described arrester is electrically connected between first electrode and second electrode; be plugged in the jack that is provided with on the base and first electrode and second electrode are corresponding respectively; also be electrically connected with the overcurrent overtemperature protection system that is used to protect arrester between described second electrode and the arrester, and this overcurrent overtemperature protection system places in the insulation crust.
Described overcurrent overtemperature protection system comprises sheet metal and the spring operation means that is electrically connected with sheet metal; described spring operation means comprises and is the spring that compresses shape; described sheet metal is provided with solder joint position and overcurrent protection fusing zone, and described solder joint position and arrester weld together by solder.
Described spring operation means also comprises plastic components movably and is fixedly installed on metal connecting piece on this plastic components, and described compression shape spring places in the plastic components, and described metal connecting piece two ends are electrically connected with the sheet metal and second electrode respectively.
Described spring operation means one end is provided with push rod, is provided with the remote signalling warning device corresponding with push rod in the base.
Described plastic components upper surface is provided with the inefficacy cue mark, and the shell body of this plastic components upper surface correspondence is provided with display window.
At least be connected with an anti-error code device between described base and the protector.
Described anti-error code device comprises addressable part and the Gray code parts that are connected, and addressable part and Gray code parts are installed in respectively on base and the protector.
Described arrester is a gas discharger.
By above technical scheme, the utility model possesses following beneficial effect:
1. the utility model is electrically connected the overcurrent overtemperature protection system that is used to protect arrester between the arrester and second electrode, thereby it is excessive because of voltage to realize working as the arrester two ends, reach a certain preset value, be that arrester conducting and heating are to reach a certain temperature constantly, this overcurrent overtemperature protection system will cut off circuit, thereby prevent that effectively arrester from causing short circuit to damage because of overheated; In addition; when the surge current of arrester circuit excessive; when reaching a certain preset value; this overcurrent overtemperature protection system also can in time cut off circuit; thereby prevent that effectively arrester from damaging because of unusual surge current causes short circuit; it is the useful life that the utility model can greatly improve arrester; can avoid effectively simultaneously because the relevant protective relaying maloperation accident that component wear causes; utilize the utility model; when voltage transformer secondary protective device described in the utility model lost efficacy because of overcurrent or overvoltage; arrester can also recycle, and avoids the wasting of resources.
2. overcurrent overtemperature protection system described in the utility model comprises sheet metal and the spring operation means that is electrically connected with sheet metal, described sheet metal is provided with solder joint position and overcurrent protection fusing zone, described solder joint position and arrester weld together by solder, then when the arrester both end voltage is excessive, the heat of its generation will make the fusing of low temperature solder joint, be that solder joint position and arrester disconnect, at this moment, reset with the compression spring in the spring operation means that sheet metal is connected, thereby can keep the state that solder joint position and arrester disconnect all the time, promptly reach overvoltage protection arrester; And when arrester two ends electric current is excessive; overcurrent protection fusing zone will fuse, and promptly described sheet metal fracture is same; reset with the compression spring in the spring operation means that sheet metal is connected, thereby can keep the state that solder joint position and arrester disconnect all the time.
3. the utility model is provided with the inefficacy cue mark in the upper surface of plastic components; and on the shell of the upper surface of plastic components correspondence, display window is set; then when the utility model lost efficacy; when being disconnection of solder joint position and arrester or sheet metal fracture; plastic components takes place to move because of resetting of spring of compression; thereby can find from display window, change the voltage of power instrument transformer neutral point protection lightning protection device of this inefficacy in time.
4. employing technical solutions of the utility model can make its through-current capability can reach 25kA, and residual voltage is smaller or equal to 1kV.
Description of drawings
Fig. 1 is a perspective view of the present utility model;
Fig. 2 is the circuit floor map in kind of the utility model protector;
Fig. 3 is the circuit schematic perspective view in kind of the utility model protector
Fig. 4 is the perspective view in the utility model protector front, wherein, has cut plastic components open;
Fig. 5 is the perspective view of the utility model protector back, wherein, has cut plastic components open;
Fig. 6 is the utility model protector planar structure schematic diagram.
Embodiment
Explain the technical solution of the utility model below with reference to accompanying drawing.
As shown in Figure 1; voltage of power instrument transformer secondary earth leakage protector described in the utility model; comprise base 1 and be connected protector 2 on the base 1; be provided for connecting the binding post of lead on the described base 1; described protector 2 comprises an insulation crust 3 and places arrester 4 in this insulation crust 3; arrester 4 described in the utility model is mainly gas discharger; and insulation crust 3 is provided with first electrode 51 and second electrode 52; described arrester is electrically connected between first electrode 51 and second electrode 52; be plugged in the jack that is provided with on the base 1 and first electrode 51 and second electrode 52 are corresponding respectively; also be electrically connected with the overcurrent overtemperature protection system that is used to protect arrester 4 between described second electrode 52 and the arrester 4, and this overcurrent overtemperature protection system places in the insulation crust 3.
Extremely shown in Figure 6 as Fig. 2; described overcurrent overtemperature protection system comprises sheet metal 61 and the spring operation means that is electrically connected with sheet metal 61; described spring operation means comprises and is the spring 621 that compresses shape, plastic components 622 and be fixedly installed on metal connecting piece 623 on this plastic components 622 movably; described compression shape spring 621 places in the plastic components 622, and described metal connecting piece 623 two ends are electrically connected with the sheet metal 61 and second electrode 52 respectively.Described sheet metal 61 is provided with solder joint position 611 and overcurrent protection fusing zone 612, described solder joint position 611 and arrester 4 weld together by solder, overcurrent protection fusing described in the utility model zone 612 is by dwindling sheet metal 61 certain a part of sectional area to increase its resistance, thereby realize the function of fuse, for dwindling the sectional area of sheet metal 61, the utility model dwindles the cross section with certain part of sheet metal 61, perhaps a certain surface of sheet metal 61 is provided with through hole to form this overcurrent protection fusing zone 612, know thus, the solder joint position 611 that is provided with on the sheet metal 61 is used to realize the hot tripping function of power current of the utility model lightning protection device, to prevent that the arrester 4 in the insulation crust from causing short circuit to damage because of overheated, when the heating temp of arrester 4 when reaching a certain temperature, solder joint position 611 and arrester 4 fusing, spring operation means drives sheet metal 61 actions, makes arrester 4 breaking circuits; The overcurrent protection fusing zone 612 that is provided with on the sheet metal 61 is used to realize big current-release function of the present utility model; prevent that the interior arrester 4 of insulation crust damages because of short circuit because unusual surge current only causes; when occurring surpassing the surge current of a certain current value; this overcurrent protection fusing zone 612 is because of big current fusing; spring operation means drives sheet metal 61 actions after the fusing, makes arrester 4 breaking circuits to realize its protection.
In addition; described plastic components 622 upper surfaces are provided with inefficacy cue mark 7; and the shell body of these plastic components 622 upper surface correspondences is provided with display window 8; described spring operation means one end is provided with push rod 624; be provided with the remote signalling warning device corresponding in the base 1 with push rod 624; then reach the unusual surge current that overcurrent protection fusing zone 612 is provided with when existing; when perhaps reaching the power current of solder joint position 611 solders; 612 fractures of current protection fusing zone or sheet metal 61 and arrester 4 disconnect; display window 7 is designated as inefficacy; and when spring operation means moves; the remote signalling warning device that push rod 624 breaks away from the base 1; alarm signal or remote alarms signal, reminding user to replace product are sent in the action of remote signalling warning device.
At least be connected with an anti-error code device between described base 1 and the protector 2; described anti-error code device comprises addressable part and the Gray code parts 9 that are connected; and addressable part and Gray code parts 9 are installed in respectively on base 1 and the protector 2, adopt the different model that anti-error code device can prevent effectively that the user is similar with outward appearance or the product misconnection of purposes to go in the circuit.
In addition, adopt technical solutions of the utility model, can make its through-current capability can reach 25kA, residual voltage is smaller or equal to 1kV.
Claims (8)
1. voltage of power instrument transformer secondary earth leakage protector; comprise base and be connected protector on the base; be provided for connecting the binding post of lead on the described base; described protector comprises an insulation crust and places the interior arrester of this insulation crust; and insulation crust is provided with first electrode and second electrode; described arrester is electrically connected between first electrode and second electrode; be plugged in the jack that is provided with on the base and first electrode and second electrode are corresponding respectively; it is characterized in that; also be electrically connected with the overcurrent overtemperature protection system that is used to protect arrester between described second electrode and the arrester, and this overcurrent overtemperature protection system places in the insulation crust.
2. voltage of power instrument transformer secondary earth leakage protector according to claim 1; it is characterized in that; described overcurrent overtemperature protection system comprises sheet metal and the spring operation means that is electrically connected with sheet metal; described spring operation means comprises and is the spring that compresses shape; described sheet metal is provided with solder joint position and overcurrent protection fusing zone, and described solder joint position and arrester weld together by solder.
3. voltage of power instrument transformer secondary earth leakage protector according to claim 2; it is characterized in that; described spring operation means also comprises plastic components movably and the metal connecting piece of fixedlying connected with this plastic components; described compression shape spring places in the plastic components, and described metal connecting piece two ends are electrically connected with the sheet metal and second electrode respectively.
4. voltage of power instrument transformer secondary earth leakage protector according to claim 2 it is characterized in that described plastic components upper surface is provided with the inefficacy cue mark, and the shell body of this plastic components upper surface correspondence is provided with display window.
5. voltage of power instrument transformer secondary earth leakage protector according to claim 2 is characterized in that spring operation means is provided with push rod, is provided with the remote signalling warning device corresponding with push rod in the base.
6. voltage of power instrument transformer secondary earth leakage protector according to claim 1 is characterized in that, is connected with an anti-error code device between described base and the protector at least.
7. voltage of power instrument transformer secondary earth leakage protector according to claim 6; it is characterized in that; described anti-error code device comprises addressable part and the Gray code parts that are connected, and addressable part and Gray code parts are installed in respectively on base and the protector.
8. according to the described voltage of power instrument transformer of 1 to 7 arbitrary claim secondary earth leakage protector, it is characterized in that described arrester is a gas discharger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200473461U CN201466676U (en) | 2009-07-09 | 2009-07-09 | Secondary grounding protector of electric power voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200473461U CN201466676U (en) | 2009-07-09 | 2009-07-09 | Secondary grounding protector of electric power voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201466676U true CN201466676U (en) | 2010-05-12 |
Family
ID=42394023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200473461U Expired - Lifetime CN201466676U (en) | 2009-07-09 | 2009-07-09 | Secondary grounding protector of electric power voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201466676U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753056A (en) * | 2015-03-30 | 2015-07-01 | 宁波广瑞通信技术有限公司 | Self-resetting communication line overvoltage protection box |
| CN104813432A (en) * | 2012-11-12 | 2015-07-29 | 上海电科电器科技有限公司 | Surge protection device having short-circuit current protection function |
| CN106602536A (en) * | 2017-02-24 | 2017-04-26 | 厦门宏发开关设备有限公司 | Surge protection module |
-
2009
- 2009-07-09 CN CN2009200473461U patent/CN201466676U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104813432A (en) * | 2012-11-12 | 2015-07-29 | 上海电科电器科技有限公司 | Surge protection device having short-circuit current protection function |
| CN104753056A (en) * | 2015-03-30 | 2015-07-01 | 宁波广瑞通信技术有限公司 | Self-resetting communication line overvoltage protection box |
| CN106602536A (en) * | 2017-02-24 | 2017-04-26 | 厦门宏发开关设备有限公司 | Surge protection module |
| CN106602536B (en) * | 2017-02-24 | 2018-12-21 | 厦门宏发开关设备有限公司 | A kind of surge protection module |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |