CN203166460U - Fault current limiter - Google Patents
Fault current limiter Download PDFInfo
- Publication number
- CN203166460U CN203166460U CN 201320098296 CN201320098296U CN203166460U CN 203166460 U CN203166460 U CN 203166460U CN 201320098296 CN201320098296 CN 201320098296 CN 201320098296 U CN201320098296 U CN 201320098296U CN 203166460 U CN203166460 U CN 203166460U
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- conducting metal
- metal rod
- fault current
- magnetic field
- field generator
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Abstract
The utility model relates to a fault current limiter, comprising an insulator material cavity, a magnetic field generator, a conductive metal rod, a spring, a signal processor, and conductive metal contacts. The magnetic field generator surrounds two sides of the insulator material cavity and is close to a position of the conductive metal rod. The conductive metal rod is disposed in the insulator material cavity, an end of the conductive metal rod is connected with the spring, and the other end of the spring is connected with an inner wall of the insulator material cavity. The conductive metal contacts are installed on the inner wall of the insulator material cavity, and are symmetrically distributed on two sides of the magnetic field generator. An end of the conductive metal contact is connected with a working circuit, and the other end contacts with the conductive metal rod. An end of the signal processor is connected with the working circuit, and the other end is connected with the magnetic field generator. The fault current limiter is characterized by convenient operation, short response time, and energy-saving, and the device is convenient to maintain, etc. The device of the fault current limiter is small in volume, and is low in investment cost and maintenance cost.
Description
Technical field
The utility model relates to a kind of electric switch equipment, and particularly a kind of fault current limiter belongs to fault current control technology field in the voltage switch equipment.
Background technology
Along with the load of China's electric power system constantly increases, the contact between each big electrical network is more and more tightr in addition, and the situation that short circuit current appears in electrical networks at different levels is also serious day by day.Short circuit current to the equipment of electric power system with and safe and stable operation very big threat is arranged.Therefore, the short circuit current that how to limit electric power system has become the key subjects that China will develop at present, and also is the assurance of China's power system safety and stability operation.A kind of effective way that fault current limiter is head it off as a kind of novel protection equipment.
The kind of fault current limiter is a lot, for example: and the mechanical switch-type fault current limiter, but its responsiveness is slow, flexibility ratio is relatively poor, installation cost is high, be difficult to the limiting short-circuit current peak value, so be not applied to Circuits System; Discharging gap type fault current limiter, it is made up of electric capacity, flow restricter and vacuum gap switch and ZnO arrester.Arc current transfevent fault current limiter, it can allow short circuit current transfer on the shunt resistance in parallel in several seconds, thereby the realization current limliting, its shortcoming is: depend on that the breaking speed of vacuum switch and transferable electric current are subjected to the influence of vacuum arc voltage bigger the transfer time of short circuit current.
The utility model content
Shortcoming at prior art, the purpose of this utility model provides a kind of fault current limiter, utilize magnetic field generator to generate an electromagnetic field, this electromagnetic field effect produces electromagnetic force control conducting metal rod position, when magnetic field generator is not worked in the conducting metal rod, circuit contacts with the conducting metal rod, be in conducting state, magnetic field generator is done the time spent, and circuit is in open-circuit condition.Utilize the position of conducting metal rod, reach the purpose that control circuit cut-offs, the reaction time is short, energy-conservation, and device is easy to safeguard.
For achieving the above object, the utility model adopts following technical scheme:
A kind of fault current limiter comprises insulator material cavity, magnetic field generator, conducting metal rod, spring, signal processor and conducting metal contact point; Described magnetic field generator is centered around described insulator material cavity both sides near the position of described conducting metal rod; Described conducting metal rod is arranged in described insulator material cavity, and an end is connected with spring, and the described spring other end is connected with insulation material cavity inner wall; Described conducting metal contact point is installed on the insulation material cavity inner wall, is symmetrically distributed in the both sides of magnetic field generator, and described conducting metal contact point one end is connected with operating circuit, and an end contacts with the conducting metal rod; Described signal processor one end connects in the operating circuit, and an end is connected on the described magnetic field generator.
Above-mentioned insulator material cavity shape is rectangle or cylindrical cavity.
Above-mentioned magnetic field generator is cylinder-shape linear induction machine or spiral winding induction motor.
Rectangle or cylindrical metal rod that above-mentioned conducting metal rod is made for conductive metallic material.
Above-mentioned signal processor is made up of rectifier, current comparator.
Above-mentioned conducting metal contact point is the metal derby that conductive metallic material is made.
The utility model has following apparent substantive distinguishing features compared with prior art:
Than existing technology, current limliting and cutout that the utility model utilizes the control of conducting metal rod position to recover automatically have the reaction time weak point, and be energy-conservation, and equipment is convenient to safeguard characteristics such as life-span height.Simultaneously equipment volume of the present utility model is little, and investment cost and maintenance cost are also relative to be lower than traditional fault current limiter.
Description of drawings
Fig. 1 is the conducting metal rod position view of the utility model embodiment under initial condition.
Fig. 2 is the conducting metal rod position view of the utility model embodiment when magnetic field generator is worked.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
As depicted in figs. 1 and 2, a kind of fault current limiter comprises insulator material cavity 1, magnetic field generator 2, conducting metal rod 3, spring 4, signal processor 6 and conducting metal contact point 7; Described magnetic field generator 2 is centered around described insulator material cavity 1 both sides near the position of described conducting metal rod 3; Described conducting metal rod 3 is arranged in described insulator material cavity 1, one end and is connected with spring 4, and described spring 4 other ends are connected with insulation material cavity 1 inwall; Described conducting metal contact point 7 is installed on insulation material cavity 1 inwall, is symmetrically distributed in the both sides of magnetic field generator 2, and described conducting metal contact point 7 one ends are connected with operating circuit 5, and an end contacts with conducting metal rod 3; Described signal processor 6 one ends connect in the operating circuit 5, and an end is connected on the described magnetic field generator 2.
In the present embodiment, described insulator material cavity 1 is shaped as cylindrical cavity.
In the present embodiment, described magnetic field generator 2 is the cylinder-shape linear induction machine.
In the present embodiment, described conducting metal rod 3 is cylindrical copper rod.
In the present embodiment, described conducting metal contact point 7 is copper billet.
In the present embodiment, signal processor 6 is made up of rectifier, current comparator.
Under the initial condition, do not have the effect of power between conducting metal rod 3 and the spring 4, this moment, two conducting metal contact points 7 contacted with conducting metal rod 3.As shown in Figure 1, this moment, operating circuit 5 loops were in path, and operating current can normally pass through flow restricter.
Described signal processor 6 with the operating current in the operating circuit 5 as input signal, the input AC operating current is via rectifier, be transformed into direct current, in signal processor 6, set a critical current intensity, input current comparator then, compare with reference current, obtain an output signal, the working condition of controlling magnetic field generator 2.After the circuit connection, receive the operating current signals by signal processor 6.When operating current less than critical current, namely operating current is in normal condition, during non-short-circuit condition, this moment, magnetic field generator 2 was not worked.When the situation that short circuit occurs, operating current can rise rapidly at short notice, surpasses critical current.After signal processor 6 is received this input signal, make magnetic field generator 2 start working, generating an electromagnetic field acts on the conducting metal rod 3.Produce electromagnetic force driving conducting metal rod 3 levels by electromagnetic induction and move right, conducting metal contact point 7 does not contact with conducting metal rod 3, and as shown in Figure 2, this moment, operating circuit was in off-state.After the short-circuit conditions maintenance finishes, signal processor 6 sends instruction and stops magnetic field generator 2, because do not have the effect of electromagnetic force, the thrust level that conducting metal rod 3 is subjected to spring 4 moves to position shown in Figure 1 left, whole loop can be got back to aforesaid regular path state and work on.
Present embodiment is substantially the same manner as Example 1, and difference is: in the present embodiment, described insulator material cavity 1 is shaped as rectangular enclosure.Described magnetic field generator 2 is the spiral winding induction motor.Described conducting metal rod 3 is the rectangle aluminium bar.Described conducting metal contact point 7 is aluminium block.
Claims (7)
1. a fault current limiter comprises insulator material cavity (1), magnetic field generator (2), conducting metal rod (3), spring (4), signal processor (6) and conducting metal contact point (7); It is characterized in that described magnetic field generator (2) is centered around described insulator material cavity (1) both sides near the position of described conducting metal rod (3); Described conducting metal rod (3) is arranged in described insulator material cavity (1), and an end is connected with spring (4), and described spring (4) other end is connected with insulation material cavity (1) inwall; Described conducting metal contact point (7) is installed on insulation material cavity (1) inwall, is symmetrically distributed in the both sides of magnetic field generator (2), and described conducting metal contact point (7) one ends are connected with operating circuit (5), and an end contacts with conducting metal rod (3); Described signal processor (6) one ends connect in the operating circuit (5), and an end is connected on the described magnetic field generator (2).
2. a kind of fault current limiter according to claim 1 is characterized in that, described insulator material cavity (1) is shaped as rectangle or cylindrical cavity.
3. a kind of fault current limiter according to claim 1 is characterized in that, described magnetic field generator (2) is cylinder-shape linear induction machine or spiral winding induction motor.
4. a kind of fault current limiter according to claim 1 is characterized in that, rectangle or cylindrical metal rod that described conducting metal rod (3) is made for conductive metallic material.
5. a kind of fault current limiter according to claim 1 is characterized in that, described signal processor (6) is made up of rectifier, current comparator.
6. a kind of fault current limiter according to claim 1 is characterized in that, the metal derby that described conducting metal contact point (7) is made for conductive metallic material.
7. according to claim 4 or 5 described a kind of fault current limiters, it is characterized in that described conductive metallic material is iron, copper or aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320098296 CN203166460U (en) | 2013-03-05 | 2013-03-05 | Fault current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320098296 CN203166460U (en) | 2013-03-05 | 2013-03-05 | Fault current limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203166460U true CN203166460U (en) | 2013-08-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320098296 Expired - Fee Related CN203166460U (en) | 2013-03-05 | 2013-03-05 | Fault current limiter |
Country Status (1)
| Country | Link |
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| CN (1) | CN203166460U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478889A (en) * | 2016-11-01 | 2017-12-15 | 西安交通大学 | A kind of quick identification device of electromagnetic type short circuit current and method |
| CN108675144A (en) * | 2018-07-05 | 2018-10-19 | 江西飞达电气设备有限公司 | A kind of high pedestal jib crane limiter of moment |
-
2013
- 2013-03-05 CN CN 201320098296 patent/CN203166460U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478889A (en) * | 2016-11-01 | 2017-12-15 | 西安交通大学 | A kind of quick identification device of electromagnetic type short circuit current and method |
| CN108675144A (en) * | 2018-07-05 | 2018-10-19 | 江西飞达电气设备有限公司 | A kind of high pedestal jib crane limiter of moment |
| CN108675144B (en) * | 2018-07-05 | 2024-03-22 | 江西飞达电气设备有限公司 | Moment limiter of gantry crane |
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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: 20130828 Termination date: 20160305 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |