CN201576555U - Current instrument transformer insulating structure - Google Patents
Current instrument transformer insulating structure Download PDFInfo
- Publication number
- CN201576555U CN201576555U CN2009200348156U CN200920034815U CN201576555U CN 201576555 U CN201576555 U CN 201576555U CN 2009200348156 U CN2009200348156 U CN 2009200348156U CN 200920034815 U CN200920034815 U CN 200920034815U CN 201576555 U CN201576555 U CN 201576555U
- Authority
- CN
- China
- Prior art keywords
- instrument transformer
- current instrument
- current transformer
- insulation
- secondary wiring
- 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
Links
- 238000009413 insulation Methods 0.000 claims abstract description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 229910052573 porcelain Inorganic materials 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 230000009172 bursting Effects 0.000 description 3
- 230000010485 coping Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
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- Transformers For Measuring Instruments (AREA)
Abstract
The utility model discloses a current instrument transformer insulating structure, comprising an instrument transformer and a fixed iron clamp plate. An insulating plate is installed between a secondary wiring terminal of the fixed iron clamp plate and the current instrument transformer. The thickness of the insulating plate is of 3 to 5 mm, the length is of 250 to 270 mm, and the width is of 40 to 60mm. A fixed screw on the current instrument transformer is screwed off. The insulating plate with the thickness of 4 mm, the length of 260 mm and width of 50 mm is installed between the secondary wiring terminal of the fixed iron clamp plate of the current instrument transformer and the current instrument transformer; the processed center of the insulating plate is aligned to the center line of the secondary wiring terminal and is levelly advanced along the center line of the secondary wiring terminal, so as to lead the insulating plate to completely shield the back surface of the secondary wiring terminal, thereby well separating a secondary wiring plate fixed terminal from an instrument transformer iron core. The secondary wiring plate can be well fixed on the iron clamp plate after improvement; the rubber column insulation on the surface of the current instrument transformer and a switch can not be broken due to the too-long screw, the insulation outside the current instrument transformer and the switch can be ensured, and the insulation breakdown discharge incidents of the current instrument transformer of the breaker are eliminated.
Description
Technical field:
The utility model belongs to the current transformer field, relates to a kind of current transformer insulation system, the insulation system at especially a kind of secondary wiring of current mutual inductor terminal place.
Background technology:
In recent years, increasing along with the power grid construction dynamics, transformer station does not have the quickening that oiling is transformed, advantages such as ZW7-40.5 vacuum circuit-breaker switch is with its good arc extinction performance and insulation property, and, environmental protection little with floor space, drop-out current are big, stable have progressively replaced the 35kV heavy wool switch in fortune.The ZW7-40.5 vacuum circuit-breaker, this switch has obtained extensive use.But often run into circuit breaker built-in current instrument transformer insulation breakdown discharge accident in these several years new this equipment of installing, bring serious threat to electric power netting safe running.
The circuit breaker general structure is porcelain vase column support type, up-down structure, and vacuum interrupter is contained in the porcelain vase, and current transformer is installed down in the porcelain vase, between vacuum interrupter and the porcelain vase, all adopt novel circuit breaker insulation fat to fill between current transformer and the porcelain vase.Current transformer, operating mechanism and rotating part are installed in the waterproof casing.
Electric current is drawn from lower wire end through last line end, the quiet end of vacuum interrupter, moved end, by soft support, the current transformer of being connected to.
The current transformer that is installed in the switch cubicle is to use for the instrument and the relay protector that will connect ammeter and so on.Be the little electric current of standard that the big electrorheological of primary side changes secondary side into to be cooperated with instrument can carry out the electric current electric energy measurement; cooperate and to carry out overcurrent overload and short-circuit protection to system with relay; it can make instrument relay protective device and circuit high pressure isolate the safety of protection personnel and equipment.Produce high voltage damage equipment or casualty accident but run into secondary loop of mutual inductor open circuit in routine duties sometimes, in the protection loop current transformer occur second open circuit be not easy found.If system earth or short circuit have taken place, protective device is tripping normally, and switch does not trip or overstep tripping occurs, makes the safety of power failure enlarged areas, power supply and reliability just can not get guaranteeing.If occur in the measurement loop, then error will appear in the electric energy meter metering.
The harm that single phase ground fault causes equipment:
(1) the insulation weak spot in (dead ground is to rise to the line magnitude of voltage) system may puncture because the relative voltage of non-fault raises, and causes short trouble.
(2) generation electric arc in fault point can burn out equipment and may develop into phase fault.
When (3) fault point produces intermittent electric arc, produce the connection resonance overvoltage under certain condition, the 2.5-3 that its value can reach phase voltage doubly, and is very big to system insulation harm.
Switching current instrument transformer discharge reason has 2 points:
When (1) manufacturing firm of switch designs, the secondary connection terminal is fixed on the current transformer fixed head, the punching tapping is fixed with screw.
(2) be since between fixed head and the current transformer gap too small, fixedly secondary connection terminal screw lacked the secondary connection terminal fix insecure, screw long will bursting current transformer appearance casting insulated.
All be at first apparatus insulated destruction weak spot discharge (over the ground) finally to be burnt out the switching current instrument transformer under the superpotential situation of equipment in the above in several the accidents of Fa Shenging, when serious the alternate discharge of switch is set off an explosion, the lighter burns out the current transformer of switch, and equipment can not normally be moved.
The utility model content:
The technical problem of the utility model in order to burn out the switching current instrument transformer under the superpotential situation of solution equipment, can to make the alternate discharge of switch set off an explosion, make equipment normally not move when serious, a kind of current transformer insulation system is provided, guarantee the insulation of current transformer and switch external, stopped the generation of circuit breaker current transformer insulation breakdown discharge accident.
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, and a kind of current transformer insulation system is provided, and comprises current transformer and fixing iron clamp, installs one of insulation board between the secondary connection terminal place of described fixedly iron clamp and the current transformer additional.Described insulation thickness of slab is 3-5mm, the long 250-270mm of being, the wide 40-60mm of being.The center line of the centrally aligned secondary connection terminal of described insulation board, the center line level propelling along the secondary connection terminal makes insulation board block the secondary connection terminal back side fully, thereby isolates secondary connection plate fixed terminal and transformer iron core.
Fixed screw on the current transformer is unscrewed, secondary connection terminal (long 150mm at the fixedly iron clamp of current transformer, wide 40mm) locate and current transformer between install additional thick in 4mm, long is 260mm, wide is one of the insulation board of 50mm, the center line of the centrally aligned secondary connection terminal of the insulation board that processes, center line level along the secondary connection terminal advances, make insulation board block the secondary connection terminal back side fully, thereby isolate secondary connection plate fixed terminal and transformer iron core, make the secondary connection plate can be fixed on the iron clamp preferably after the improvement, nor the glue post insulation of the long bursting switching current of meeting coping screw instrument transformer appearance, guarantee the insulation of current transformer and switch external, stopped the generation of circuit breaker current transformer insulation breakdown discharge accident.
Description of drawings:
Fig. 1 is a front view of the present utility model;
Fig. 2 is the utility model left view.
Embodiment:
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:
Referring to Fig. 1,2, a kind of current transformer insulation system comprises current transformer 1 and fixing iron clamp 2, installs 3 one of insulation boards additional between secondary connection terminal 4 places of described fixedly iron clamp 2 and the current transformer.Described insulation board 3 is thick be 3-5mm, long for 250-270mm, widely be 40-60mm.
Fixed screw on the current transformer 1 is unscrewed, secondary connection terminal 4 (long 150mm at the fixedly iron clamp of current transformer 1, wide 40mm) locate and current transformer 1 between install additional thick in 4mm, long is 260mm, wide is 3 one of the insulation boards of 50mm, the center line of the centrally aligned secondary connection terminal of the insulation board 3 that processes, center line level along secondary connection terminal 4 advances, make insulation board 3 block secondary connection terminal 4 back sides fully, thereby isolate secondary connection plate fixed terminal and transformer iron core, make the secondary connection plate can be fixed on the iron clamp preferably after the improvement, nor the glue post insulation of the long bursting switching current of meeting coping screw instrument transformer appearance, guarantee the insulation of current transformer and switch external, stopped the generation of circuit breaker current transformer insulation breakdown discharge accident.
Above content is to further describing that the present invention did in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of being submitted to.
Claims (3)
1. current transformer insulation system comprises current transformer (1) and fixing iron clamp (2), it is characterized in that: the secondary connection terminal (4) of described fixedly iron clamp (2) locate and current transformer between install (3) one of insulation boards additional.
2. a kind of according to claim 1 current transformer insulation system is characterized in that: the thick 3-5mm of being of described insulation board (3), length are 250-270mm, the wide 40-60mm of being.
3. a kind of according to claim 1 current transformer insulation system, it is characterized in that: the center line of the centrally aligned secondary connection terminal (4) of described insulation board (3), center line level along secondary connection terminal (4) advances, make insulation board (3) block secondary connection terminal (4) back side fully, thereby isolate secondary connection plate fixed terminal and transformer iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200348156U CN201576555U (en) | 2009-09-29 | 2009-09-29 | Current instrument transformer insulating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200348156U CN201576555U (en) | 2009-09-29 | 2009-09-29 | Current instrument transformer insulating structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201576555U true CN201576555U (en) | 2010-09-08 |
Family
ID=42696430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200348156U Expired - Fee Related CN201576555U (en) | 2009-09-29 | 2009-09-29 | Current instrument transformer insulating structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201576555U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360878A (en) * | 2011-07-21 | 2012-02-22 | 无锡市锡容电力电器有限公司 | Wiring structure of secondary winding of capacitor voltage transformer |
-
2009
- 2009-09-29 CN CN2009200348156U patent/CN201576555U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360878A (en) * | 2011-07-21 | 2012-02-22 | 无锡市锡容电力电器有限公司 | Wiring structure of secondary winding of capacitor voltage transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ANKANG POWER SUPPLY BUREAU Effective date: 20140409 Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: ANKANG POWER SUPPLY BUREAU Effective date: 20140409 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 725000 ANKANG, SHAANXI PROVINCE TO: 100761 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140409 Address after: 100761 West Chang'an Avenue, Beijing, No. 86, No. Patentee after: State Grid Corporation of China Patentee after: Ankang Power Supply Bureau Address before: From the 725000 health city of Shaanxi province Hanbin District Road No. 167 Patentee before: Ankang Power Supply Bureau |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20170929 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |