CN2687680Y - Composite electronic current-voltage sensor - Google Patents
Composite electronic current-voltage sensor Download PDFInfo
- Publication number
- CN2687680Y CN2687680Y CN 200320109665 CN200320109665U CN2687680Y CN 2687680 Y CN2687680 Y CN 2687680Y CN 200320109665 CN200320109665 CN 200320109665 CN 200320109665 U CN200320109665 U CN 200320109665U CN 2687680 Y CN2687680 Y CN 2687680Y
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- voltage sensor
- electronic current
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- target
- support
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Abstract
The utility model belongs to a composite electronic current-voltage sensor. The composite electronic current-voltage sensor is characterized in that the composite electronic current-voltage sensor is composed of a hollow coil, a coil brace, a fixing piece, an electrode and a shell body which are connected together, a voltage sensor is provided with an intermediate electrode between a one-time high-voltage conducting body and an earth outer shell and support frame, two capacitances C1 and C2 are formed between the one-time high-voltage conducting body and intermediate electrode, the intermediate electrode and the earth outer shell and support frame, and a current sensor and the voltage sensor are fixed in the same outer shell. The intermediate electrode and shielding covers at two ends are fixed to the earth outer shell and support frame via insulating elements and bolts, the one-time high-voltage conducting body is fixed by the insulating elements at two ends, and the hollow coil is sheathed out of the earth coil brace. The composite electronic current-voltage sensor has the advantages of small volume, light weight, favorable measurement for frequency bandwidth and linearity, high precision, digital signal output, etc.
Description
Technical field: the utility model relates to a kind of novel High-Voltage Electrical Appliances element, and it can be used for the measurement of high voltage and big electric current and provides signal to relay protection device.
Background technology: in the electric system at present, traditional electromagnetic potential transformer summation current transformer is adopted in the measurement of voltage and current and enforcement relay protection mostly.This mutual inductor all has iron core, and it is narrower to measure frequency band, magnetic saturation occurs easily and causes big error, and volume is bigger, and is very heavy, is output as simulating signal.Also have a kind of capacitance type potential transformer, because they adopt standard capacitor divider, volume is bigger and heavy, and is simulating signal output.Along with the development of technology, the volume of customer requirements electric equipment is more and more littler, and is intelligent, automaticity is more and more higher, and the digitizing of secondary relay protection also requires electric current, voltage transformer (VT) that digital signal can directly be provided.Obviously, the traditional no longer development of adaptive technique of electromagnetic potential transformer summation current transformer.
Summary of the invention: the purpose of this utility model provides a kind of compound electronic current voltage sensor, and it has, and volume is little, in light weight, the measurement bandwidth, advantages such as the measure linear degree is good, precision is high, digital signal output.
The technical solution of the utility model is: design a kind of compound electronic current voltage sensor, it is characterized in that: it is connected and composed by air core coil, coil brace, fixture, electrode, housing, voltage sensor has target between high-pressure conductor and grounding shell and support, form two capacitor C 1 and C2 between Primary Conductor and target, target and grounding shell and support, current sensor and voltage sensor are fixed in the same shell.
The radome at described target and two ends by insulation component, be bolted on grounding shell and the support, one time energized conductor is fixed by the insulating part at two ends, air core coil is enclosed within the outside of neutral earthing compensator support.
Described support is connected with grounding shell by bolt, in the inboard of support and shell target is arranged, and energized conductor and their supports, shell, target are coaxial, are integral ring-shaped structures.
Described target length range vertically is chosen in 190～210mm.
The wedge angle of described shielding bolt has radome, and radome is to be connected with shell and support by fixture.
The scope of described radome arc radius is chosen in 38～45mm.
Described arc radius is 40mm.
Described capacitor C 1 is 1: 150 with the ratio of C2.
Described sealed end daughter board is connected with body seal, is fixed with shielded cable on the sealed end daughter board.
The utlity model has following characteristics:
1. its adopts current sensor and voltage sensor to be compounded among the same shell, the center of current sensor, energized conductor annular insulation framework by being wound with secondary coil, and its two ends are supported with insulating part; Secondary coil is sleeved on the metal support of ground connection, secondary coil is to adopt Rogowski coil principle to make, when having electric current to flow through in the Primary Conductor, the magnetic field that produces around it can induce voltage in secondary coil, the size that flows through electric current in the derivative of this voltage and the Primary Conductor is directly proportional, and the phase place unanimity.No iron core does not have the magnetic saturation phenomenon, and measurement range is wide, the linearity good; The method that voltage sensor adopts the capacitance partial pressure principle and radially samples, between high-pressure conductor and grounding shell, insert target, so just, between Primary Conductor and target, target and grounding shell, form two capacitor C 1 and C2, when Primary Conductor band high voltage, the derivative and the primary voltage of the voltage signal of adopting from the sampling resistor two ends in parallel with C2 are approximated to proportional relation.It makes that equally measurement range is wide, the linearity good, can not produce magnetic saturation and ferromagnetic resonance phenomenon, and dividing potential drop electric capacity is ganged condenser, and this capacitor that radially distributes is to make full use of structural design features and the electric capacity that forms, and simple in structure, volume is little; Capacitor is mainly with compression SF
6Gas guarantees the stable of capacitance, thereby guarantees the high measuring accuracy of voltage sensor that volume is little, and is in light weight, ratio of performance to price height as insulating medium.
2, owing to there is not the magnetic saturation phenomenon, measurement range is wide, bandwidth, and therefore same equipment both can be used as measurement usefulness, can be used as protection again and uses.Digitizing output can be satisfied the digitizing of measurement, relay protection, intelligentized requirement.
3, the sealed end daughter board is connected with body seal, and it also can not be subjected to the signal that collects the signal processing apparatus of exporting to of external interference with shielded cable.
Below in conjunction with the embodiment accompanying drawing the utility model is described further.
Description of drawings: Fig. 1 is embodiment partial structurtes synoptic diagram.
Among the figure: 1, conductor; 2, bolt; 3, shielded cable; 4, shell; 5, sealed end daughter board; 6, bolt; 7, insulation component; 8, insulation component; 9, air core coil; 10, support; 11, target; 12, radome.
Embodiment: as shown in Figure 1, air core coil 9 is sleeved on the outside of the coil brace 10 of ground connection, support 10 links to each other with the shell 4 of ground connection by bolt 2, install target 11 additional in the inboard of support 10, the radome 12 at target 11 and two ends is fixed on the support 10 of the shell 4 of ground connection and ground connection by insulation component 7,8 and bolt 6, once charged (voltage and current) conductor 1 is fixed by the insulating part at two ends, guarantees coaxial with above-mentioned element shell 4, air core coil 9, support 10, target 11, radome 12.The voltage signal of gathering from air core coil 9 and sampling resistor two ends in parallel with C2 is transferred to signal processing apparatus by shielded cable 3 and sealed end daughter board 5.This compound electronic current voltage sensor, for current sensor, the center of energized conductor annular insulation framework by being wound with secondary coil, secondary coil adopts the Rogowski coil, when having electric current to pass through in the Primary Conductor, the magnetic field that produces around it can induce voltage in secondary coil, the size that flows through electric current in the derivative of this voltage and the Primary Conductor is directly proportional, and the phase place unanimity.Because secondary coil does not have iron core, therefore, does not have the magnetic saturation phenomenon, is good linear relationship in the whole measurement range, measurement range is wide, and precision is higher.For voltage sensor integral body is annular, and the method that adopts the capacitance partial pressure principle and radially sample makes volume little.Between high-pressure conductor and grounding shell and support, insert target, so just, form two capacitor C 1 and C2 between Primary Conductor and target, target and grounding shell and support, the derivative and the primary voltage of the voltage signal of adopting from the sampling resistor two ends in parallel with C2 are approximated to proportional relation like this.By reasonable structural design, guaranteeing has certain proportionate relationship between C1 and the C2, and selects suitable sampling resistor, can guarantee that measuring error is within the scope of regulation.Therefore volume is little, and no iron core can not produce the ferromagnetic resonance phenomenon.
Claims (9)
1, compound electronic current voltage sensor, it is characterized in that: it is connected and composed by air core coil, coil brace, fixture, electrode, sealed end daughter board, housing, voltage sensor has target between high-pressure conductor and grounding shell and support, form two capacitor C 1 and C2 between Primary Conductor and target, target and grounding shell and support, current sensor and voltage sensor are fixed in the same shell.
2, compound electronic current voltage sensor according to claim 1, it is characterized in that: the radome at target and two ends by insulation component, be bolted on grounding shell and the support, one time energized conductor is fixed by the insulating part at two ends, and air core coil is enclosed within the outside of neutral earthing compensator support.
3, compound electronic current voltage sensor according to claim 1, it is characterized in that: described support is connected with grounding shell by bolt, there is target inboard at support and shell, energized conductor and their supports, shell, target are coaxial, are integral ring-shaped structures.
4, compound electronic current voltage sensor according to claim 1, it is characterized in that: described target length range vertically is at 190～210mm.
5, compound electronic current voltage sensor according to claim 2 is characterized in that: described radome is to be connected with shell and support by fixture.
6, compound electronic current voltage sensor according to claim 2, it is characterized in that: the scope of described radome arc radius is chosen in 38～45mm.
7, compound electronic current voltage sensor according to claim 6, it is characterized in that: described arc radius is 40mm.
8, compound electronic current voltage sensor according to claim 1 is characterized in that: described capacitor C 1 is 1: 150 with the ratio of C2.
9, compound electronic current voltage sensor according to claim 1, it is characterized in that: described body seal is connected with the sealed end daughter board, is fixed with shielded cable on the sealed end daughter board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320109665 CN2687680Y (en) | 2003-10-24 | 2003-10-24 | Composite electronic current-voltage sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320109665 CN2687680Y (en) | 2003-10-24 | 2003-10-24 | Composite electronic current-voltage sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2687680Y true CN2687680Y (en) | 2005-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320109665 Expired - Lifetime CN2687680Y (en) | 2003-10-24 | 2003-10-24 | Composite electronic current-voltage sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2687680Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869143A (en) * | 2014-03-05 | 2014-06-18 | 西北核技术研究所 | Gas discharging current measuring device |
| CN113533821A (en) * | 2020-04-13 | 2021-10-22 | 矢崎总业株式会社 | Current sensor |
-
2003
- 2003-10-24 CN CN 200320109665 patent/CN2687680Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869143A (en) * | 2014-03-05 | 2014-06-18 | 西北核技术研究所 | Gas discharging current measuring device |
| CN113533821A (en) * | 2020-04-13 | 2021-10-22 | 矢崎总业株式会社 | Current sensor |
| CN113533821B (en) * | 2020-04-13 | 2024-05-17 | 矢崎总业株式会社 | Current sensor |
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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 |
Owner name: XI AN XD SWITCHHGEAR ELECTRIC CO.,LTD. Free format text: FORMER NAME: XI AN XIKAI HIGH-VOLTAGE ELECTRIC CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 710077 No. 509, Daqing Road, Xi'an, Shaanxi Patentee after: Xi'an XD Switchgear Electic Co., Ltd. Address before: 710077 No. 29, Daqing Road, Xi'an, Shaanxi Patentee before: Xi'an Xikai High-Voltage Electric Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131024 Granted publication date: 20050323 |