CN204142823U - A kind of measurement and protective device being applied to 10kV electric system - Google Patents
A kind of measurement and protective device being applied to 10kV electric system Download PDFInfo
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- CN204142823U CN204142823U CN201420607834.4U CN201420607834U CN204142823U CN 204142823 U CN204142823 U CN 204142823U CN 201420607834 U CN201420607834 U CN 201420607834U CN 204142823 U CN204142823 U CN 204142823U
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Abstract
Be applied to measurement and the protective device of 10kV electric system, comprise current transformer, one end of current transformer connects 10kV inlet wire, and the other end connects 10kV bus, and current transformer is to double measurement equipment output current signal; Also comprise 3 Hall elements, each Hall element comprises shell and is arranged on the Hall plate of case surface, the top of shell is circular ring structure, the triple-phase line of 10kV bus is each passed through the circular ring structure of 3 Hall elements, Hall plate draws a, b, c, d tetra-lead-in wire, a, b lead-in wire of each Hall element connects 220V excitation power supply, and c goes between connecting secondary measuring equipment, and d goes between equal ground connection.The utility model can realize the function of conventional P T measuring circuit voltage, effectively can avoid again the various adverse consequencess that PT resonance produces.
Description
Technical field
The utility model belongs to electric and electronic technical field, particularly a kind of measurement and the protective device being applied to 10kV electric system.
Background technology
Voltage transformer (VT) (PT) in 10kV electric system is adopt electromagnetic potential transformer mostly, due to the system that 10kV electric system is isolated neutral, therefore single-phase earthing is its a kind of common provisional fault, when there is singlephase earth fault elimination, because systematic parameter changes, PT iron core may occur saturated and induction reactance declines, and meets condition of resonance with electrical network capacitive reactance, thus the ferroresonance occurred under certain frequency, produce superpotential.The intermittent electric arc of single-phase earthing point recovers normal at extinguishing moment system voltage in addition, and after arc reignition, system voltage changes again, and the change fluctuated of such voltage is also the reason of initiating system resonance.Ferroresonance and superpotential will cause PT high-voltage wire iron-melting fusing, even cause PT overheated burn or insulation breakdown damage.
PT resonant circuit can be reduced to the resonant circuit of a LC, and wherein inductance L is the induction reactance of electromagnetic potential transformer, and electric capacity C is system capacitance.Replace PT according to a kind of new sensor, this sensor can eliminate the inductance in resonant tank completely, then do not constitute the condition of resonance, eliminates the generation of resonance from principle.
Utility model content
In order to solve the technical matters that background technology exists, the utility model aims to provide a kind of measurement and the protective device that are applied to 10kV electric system, can realize the function of PT measuring circuit voltage, effectively can avoid again the various adverse consequencess that PT resonance produces.
In order to realize above-mentioned technical purpose, the technical solution of the utility model is:
Comprise current transformer, one end of current transformer connects 10kV inlet wire, and the other end connects 10kV bus, and current transformer is to double measurement equipment output current signal; Also comprise 3 Hall elements, each Hall element comprises shell and is arranged on the Hall plate of case surface, the top of shell is circular ring structure, the triple-phase line of 10kV bus is each passed through the circular ring structure of 3 Hall elements, Hall plate draws a, b, c, d tetra-lead-in wire, a, b lead-in wire of each Hall element connects 220V excitation power supply, and c goes between connecting secondary measuring equipment, and d goes between equal ground connection.
Wherein, the shell of above-mentioned Hall element is formed by epoxy encapsulation.
Wherein, the Hall plate of above-mentioned Hall element adopts semiconductor monocrystal sheet.
Wherein, above-mentioned semiconductor monocrystal sheet is silicon single crystal flake.
Wherein, above-mentioned Hall element is arranged on below the busbar in the switch cubicle of 10kV electric system, and mounting means is column support type mounting means.
Adopt the beneficial effect that technique scheme is brought:
The utility model adopts Hall element to replace the voltage signal of conventional electromagnetic voltage sensor senses 10kV bus, inductance L in thorough elimination LC resonant tank, do not constitute the condition of resonance, eliminate the generation of LC resonance from principle, avoid the adverse consequences that LC resonance brings.
Accompanying drawing explanation
Fig. 1 is connection schematic diagram of the present utility model.
Fig. 2 is the connection schematic diagram of the utility model Hall element.
Fig. 3 is the schematic diagram of the utility model Hall element.
Embodiment
Below with reference to accompanying drawing, the technical solution of the utility model is described in detail.
Connection schematic diagram of the present utility model as shown in Figure 1; a kind of measurement and protective device being applied to 10kV electric system; comprise current transformer (CT); one end of current transformer connects 10kV inlet wire; the other end connects 10kv bus, and current transformer is to double measurement equipment output current signal.The effect of CT is by electromagnetic induction, the big current in primary circuit is transferred to the standard small area analysis of secondary circuit, is convenient to double measurement equipment to the measurement of circuit and protection.
The connection schematic diagram of the utility model Hall element as shown in Figure 2, the utility model also comprises 3 Hall elements, and Hall element is arranged on below the busbar in the switch cubicle of 10kV electric system, and mounting means is column support type mounting means.The structural representation of Hall element as shown in Figure 3, each Hall element comprises shell and is arranged on the Hall plate of case surface, shell upper is circular ring structure, the threephase cable of 10kV bus is each passed through the circular ring structure of 3 Hall element upper ends, Hall plate draws a, b, c, d tetra-lead-in wire, and a, b lead-in wire of 3 Hall elements connects 220V excitation power supply; The c lead-in wire connecting secondary measuring equipment of 3 Hall elements; The d of 3 Hall elements goes between equal ground connection.
In the present embodiment, the shell of Hall element is formed by epoxy encapsulation.The Hall plate of Hall element adopts silicon single crystal flake.
Above embodiment is only and technological thought of the present utility model is described; protection domain of the present utility model can not be limited with this; every technological thought according to the utility model proposes, any change that technical scheme basis is done, all falls within the utility model protection domain.
Claims (5)
1. one kind is applied to measurement and the protective device of 10kV electric system, comprise current transformer, one end of current transformer connects 10kV inlet wire, the other end connects 10kV bus, current transformer is to double measurement equipment output current signal, it is characterized in that: also comprise 3 Hall elements, each Hall element comprises shell and is arranged on the Hall plate of case surface, the top of shell is circular ring structure, the triple-phase line of 10kV bus is each passed through the circular ring structure of 3 Hall elements, Hall plate draws a, b, c, d tetra-lead-in wire, the a of each Hall element, b lead-in wire connects 220V excitation power supply, c lead-in wire connecting secondary measuring equipment, d goes between equal ground connection.
2. a kind of measurement and protective device being applied to 10kV electric system according to claim 1, is characterized in that: the shell of described Hall element is formed by epoxy encapsulation.
3. a kind of measurement and protective device being applied to 10kV electric system according to claim 1, is characterized in that: the Hall plate of described Hall element adopts semiconductor monocrystal sheet.
4. a kind of measurement and protective device being applied to 10kV electric system according to claim 3, is characterized in that: described semiconductor monocrystal sheet is silicon single crystal flake.
5. a kind of measurement and protective device being applied to 10kV electric system according to claim 1, it is characterized in that: described Hall element is arranged on below the busbar in the switch cubicle of 10kV electric system, and mounting means is column support type mounting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420607834.4U CN204142823U (en) | 2014-10-21 | 2014-10-21 | A kind of measurement and protective device being applied to 10kV electric system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420607834.4U CN204142823U (en) | 2014-10-21 | 2014-10-21 | A kind of measurement and protective device being applied to 10kV electric system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204142823U true CN204142823U (en) | 2015-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420607834.4U Active CN204142823U (en) | 2014-10-21 | 2014-10-21 | A kind of measurement and protective device being applied to 10kV electric system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204142823U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239442A (en) * | 2018-11-08 | 2019-01-18 | 广东电网有限责任公司 | Split-core type meter loop switch device and split-core type meter |
| CN117607640A (en) * | 2024-01-15 | 2024-02-27 | 华中科技大学 | Alternating current arc modeling method considering multi-transient process and time-varying heavy arcing conditions |
-
2014
- 2014-10-21 CN CN201420607834.4U patent/CN204142823U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239442A (en) * | 2018-11-08 | 2019-01-18 | 广东电网有限责任公司 | Split-core type meter loop switch device and split-core type meter |
| CN117607640A (en) * | 2024-01-15 | 2024-02-27 | 华中科技大学 | Alternating current arc modeling method considering multi-transient process and time-varying heavy arcing conditions |
| CN117607640B (en) * | 2024-01-15 | 2024-04-05 | 华中科技大学 | Alternating current arc modeling method considering multi-transient process and time-varying heavy arcing conditions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 211100 No. 108, Wen Shen Xi Road, Jiangning District, Jiangsu, Nanjing Patentee after: Jiangsu Inca new energy Polytron Technologies Inc Address before: 211100 No. 108, Wen Shen Xi Road, Jiangning District, Jiangsu, Nanjing Patentee before: Jiangsu prints and adds new forms of energy development in science and technology Co., Ltd |