CN202178561U - Short circuit current limiter - Google Patents
Short circuit current limiter Download PDFInfo
- Publication number
- CN202178561U CN202178561U CN2011202768807U CN201120276880U CN202178561U CN 202178561 U CN202178561 U CN 202178561U CN 2011202768807 U CN2011202768807 U CN 2011202768807U CN 201120276880 U CN201120276880 U CN 201120276880U CN 202178561 U CN202178561 U CN 202178561U
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- CN
- China
- Prior art keywords
- isolator
- short circuit
- circuit current
- electronic controller
- explosive
- 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
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Abstract
The utility model relates to a short circuit current limiter, which comprises an isolator. A conductive bar is embedded in the isolator. Two ends of the conductive bar stretch out of an insulation casing of the isolator, a burst groove filled with explosive is arranged on the conductive bar, and a rogowski coil is sleeved on the conductive bar. An electronic controller is arranged at one end of the isolator, the signal input end of the electronic controller is connected with the rogowski coil, and the signal output end of the electronic controller is connected with an electric detonator used for detonating the explosive. Two ends of the isolator are connected on a base through an isolator transformer and an insulator bearing, and the output end of the isolator transformer is connected with the electronic controller. The short circuit current limiter further comprises a current-limiting fuse protector in parallel connection with the isolator. When the rogowski coil detects that short circuit current occurs in a circuit, the electronic controller drives the explosive to explode, the impact caused by the explosion disconnects the conductive bar to disconnect the isolator, the short circuit current passes through the current-limiting fuse protector which completely disconnects the short circuit current, disconnection of the whole short circuit current is finished within 5ms, disconnection time of the short circuit current is greatly shortened, and power supply equipment is effectively protected.
Description
Technical field
The utility model relates to a kind of short circuit current limiter, is mainly used in the path of fast shut-off short circuit current in the current supply circuit.
Background technology
In electric power systems such as generating, power transformation and power supply, break down when short circuit current occurring, be the stability of protection equipment, circuit, avoid receiving short circuit current and damage, need use circuit breaker and carry out fast shut-off.The present all kinds of circuit breaker standard-sized sheet break times maintain 100-200ms basically; So at this moment; Each equipment must tolerate temperature rise and the surge that is caused by short circuit current, and its manufacturing to equipment has proposed very high requirement, particularly along with the continuous increase of each place capacity in the electric power system; This problem has become the biggest problem of device fabrication, and it is extremely urgent further to develop the device that shortens the breaker open operation time or develop a kind of more fast shut-off short circuit current.
Summary of the invention
The technical problem that the utility model will solve provides a kind of standard-sized sheet break time at the short circuit current limiter of 5ms with interior and dependable performance.
For solving the problems of the technologies described above; The technical scheme of the utility model is: a kind of short circuit current limiter, and its innovative point is: comprise an isolator, this isolator is built-in with the busbar that the isolator insulation shell is stretched out at two ends; The part side that said busbar is positioned at the isolator insulation shell is provided with the explosion groove; Be filled with the explosive of being ignited by explosive rope in the explosion groove, explosive rope is connected with electric cap, is set with Luo-coil on the busbar of isolator; One end of said isolator also is equipped with electronic controller, and the signal input part of this electronic controller is connected with Luo-coil, and signal output part is connected with electric cap; One base, on base, the isolation transformer voltage output is connected with the electronic controller mains side through isolating transformer and insulator support at the isolator two ends; Also comprise a current limiting fuse, the parallelly connected setting of this current limiting fuse with isolator.
Further, said electronic controller is positioned at the high-pressure side of short circuit current limiter.
The advantage of the utility model is: under the normal condition; Electric current passes through from isolator, and when short circuit current occurring in the path, Luo-coil flows to electronic controller after detecting big electric current; Big current instantaneous value has surpassed specified threshold values; Electronic controller carries ignition signal to give the electric cap that is built in the isolator, and electric cap drives explosive rope and explosive charge, and the impulsive force of blast is cut off the busbar in the isolator.After isolator broke off, short circuit current passed through from current limiting fuse, realized the thorough cut-out of short circuit current by current limiting fuse, and being breaking in the 5ms of whole short circuit current accomplished, and had shortened short circuit current break time greatly, had effectively protected power supply unit.
The electronic controller that carries out initiation control is installed in isolator one end, is positioned at the high-pressure side of whole short circuit current limiter, is supplied power by isolating transformer; Need not the coupled high voltage signal; Antijamming capability is stronger, and job stability is high, belongs to a kind of novel trigger equipment.
Description of drawings
Fig. 1 is the utility model short circuit current limiter structural representation.
Fig. 2 is a spacer structures sketch map in the utility model.
Embodiment
Shown in accompanying drawing, comprise isolator 1, current limiting fuse 2, connecting terminal block 3, bolt 4, electronic controller 5, isolating transformer 6, insulator 7 and base 8.
The busbar 11 that above-mentioned isolator 1 adopts the directional blasting cutting technique of present technology maturation to cut off in the isolator 1 is realized isolating.Its concrete structure is: comprise insulation shell 12; Be located in the insulation shell 12 and the busbar 11 of insulation shell 12 is stretched out at two ends; The part side that busbar 11 is positioned at insulation shell 12 is provided with the explosion groove, is filled with the explosive of being ignited by explosive rope 13 in the explosion groove, and explosive rope is connected with electric cap.Be set with the Luo-coil of induction Short-Circuit High Current on the busbar 11 of isolator 1.
2 parallel connections are provided with isolator 1 with current limiting fuse, and both are connected with bolt through bent plate.The resistance of current limiting fuse 2 is greater than the resistance of isolator 1, and busbar 11 two ends of isolator are connected fixing with the connecting terminal block 3 at two ends respectively after stretching out insulation shell 12 through bolt 4.
Electronic controller 5 is installed on the connecting terminal block 3 of isolator 1 one ends, promptly is positioned at the high-pressure side of short circuit current limiter, and the signal input part of electronic controller 5 is connected with Luo-coil, and signal output part is connected with the electric cap of isolator 1.
The connecting terminal block 3 at isolator 1 two ends is bearing on the base 8 through isolating transformer 6 and insulator 7 respectively.Isolating transformer 6 is used for electronic controller 5 is supplied power.
Operation principle is: under the normal condition, because the resistance of isolator 1 is less than the resistance of current limiting fuse 2, electric current passes through from isolator 1; When short circuit current occurring in the path; Luo-coil flows to electronic controller 5 after detecting big electric current, and after big current instantaneous value surpassed threshold values, electronic controller 5 carried ignition signal to give the electric cap that is built in the isolator 1; Electric cap drives explosive rope and explosive 13 blasts, the busbar 11 of the impulsive force of blast in 200 μ m internal cutting off isolators 1.
After isolator 1 path breaks off; Short circuit current passes through from current limiting fuse 2, and by the thorough cut-out of current limiting fuse 2 realization short circuit currents, the standard-sized sheet end time of whole short circuit current accomplishes in 5ms; Shorten short circuit current break time greatly, effectively protected power supply unit.
Claims (2)
1. short circuit current limiter; It is characterized in that: comprise an isolator; This isolator is built-in with the busbar that the isolator insulation shell is stretched out at two ends, and the part side that said busbar is positioned at the isolator insulation shell is provided with the explosion groove, is filled with the explosive of being ignited by explosive rope in the explosion groove; Explosive rope is connected with electric cap, is set with Luo-coil on the busbar of isolator; One end of said isolator also is equipped with electronic controller, and the signal input part of this electronic controller is connected with Luo-coil, and signal output part is connected with electric cap; One base, on base, the isolation transformer voltage output is connected with the electronic controller mains side through isolating transformer and insulator support at the isolator two ends; Also comprise a current limiting fuse, the parallelly connected setting of this current limiting fuse with isolator.
2. short circuit current limiter according to claim 1 is characterized in that: said electronic controller is positioned at the high-pressure side of short circuit current limiter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202768807U CN202178561U (en) | 2011-08-02 | 2011-08-02 | Short circuit current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202768807U CN202178561U (en) | 2011-08-02 | 2011-08-02 | Short circuit current limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202178561U true CN202178561U (en) | 2012-03-28 |
Family
ID=45868425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202768807U Expired - Fee Related CN202178561U (en) | 2011-08-02 | 2011-08-02 | Short circuit current limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202178561U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855676A (en) * | 2014-03-14 | 2014-06-11 | 中国海洋石油总公司 | Rapid current-limiting fuse protector of offshore platform power grid |
| CN105305370A (en) * | 2015-12-09 | 2016-02-03 | 吉少波 | Electric automobile short circuit protector |
| GB2593917A (en) * | 2020-04-09 | 2021-10-13 | Eaton Intelligent Power Ltd | An electric power supply disconnecting device and a method for disconnecting an electric power supply from a load in a vehicle |
-
2011
- 2011-08-02 CN CN2011202768807U patent/CN202178561U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855676A (en) * | 2014-03-14 | 2014-06-11 | 中国海洋石油总公司 | Rapid current-limiting fuse protector of offshore platform power grid |
| CN105305370A (en) * | 2015-12-09 | 2016-02-03 | 吉少波 | Electric automobile short circuit protector |
| GB2593917A (en) * | 2020-04-09 | 2021-10-13 | Eaton Intelligent Power Ltd | An electric power supply disconnecting device and a method for disconnecting an electric power supply from a load in a vehicle |
| GB2593917B (en) * | 2020-04-09 | 2023-06-14 | Eaton Intelligent Power Ltd | An electric power supply disconnecting device and a method for disconnecting an electric power supply from a load in a vehicle |
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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 |
Granted publication date: 20120328 Termination date: 20180802 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |