CN204241540U - A kind of voltage measuring apparatus of contact resistance - Google Patents
A kind of voltage measuring apparatus of contact resistance Download PDFInfo
- Publication number
- CN204241540U CN204241540U CN201420682156.8U CN201420682156U CN204241540U CN 204241540 U CN204241540 U CN 204241540U CN 201420682156 U CN201420682156 U CN 201420682156U CN 204241540 U CN204241540 U CN 204241540U
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- China
- Prior art keywords
- measuring apparatus
- voltage measuring
- housing
- contact resistance
- secondary shielding
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- 238000007599 discharging Methods 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 239000012212 insulator Substances 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 22
- 238000005259 measurement Methods 0.000 claims description 15
- 238000010891 electric arc Methods 0.000 abstract description 6
- 230000001052 transient effect Effects 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical group C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
A kind of voltage measuring apparatus of contact resistance, comprise closed insulation shell, be arranged at the voltage measuring apparatus in housing, be set in first on housing, secondary shielding cover, described voltage measuring apparatus is provided with and extends to first of outside, second p-wire, first, second p-wire and voltage measuring apparatus outer peripheral face are enclosed with the 3rd, 4th bell housing, described first, secondary shielding cover is corresponding to the 3rd, 4th bell housing conduction connects, described 3rd, 4th bell housing is separated by the insulator be set on the first p-wire, described first, secondary shielding cover interval arranges and intercepts gap to be formed, described first, secondary shielding overlaps relative annular edge along being formed with at least one electric discharge salient angle respectively, described first, the electric discharge salient angle of secondary shielding cover is oppositely arranged to form discharging gap, discharging gap can discharge when there is transient overvoltage, fault electric arc is guided into outside housing, prevent the voltage measuring apparatus in electric arc damage housing.
Description
Technical field
The utility model relates to a kind of voltage measuring apparatus of contact resistance, and especially a kind of terminal voltage for measuring contact resistance is to calculate the resistance of contact resistance.
Background technology
People wish that electrical equipment contact is zero in contact site to the inhibition of circuit usually, and namely contact resistance is zero.But great many of experiments shows, the resistance at relay contacts position exists more or less, cannot ignore the impact of circuit.Therefore, the contact resistance of research electrical equipment, becomes extremely important to reduce to the impact of circuit.
Contact resistance is the resistance that two contact elements produce in contact site, whether the reliable operation of contact element, normal water conservancy diversion loop is generally several to tens microhms, there are even several thousand microhms up to a hundred, it is just that whether the resistivity of its contact site, pressure, free area are stablized in essence, contact resistance is the potential difference (PD) on surface in contact both sides and the ratio by the electric current of surface in contact, meets Ohm law, i.e. R
x=U/I, the metering system of current contact resistance all carries out under right and wrong online (off-line), provides a direct supply, and records U and I by reometer and voltage table, then calculate contact resistance R by measurement mechanism to contact resistance two ends
x.Due to the potential difference (PD) of the contact resistance under live line measurement forceful electric power in electric system, need to consider that interference under highfield and high-intensity magnetic field and measurement mechanism are to itself the problem such as security of system and measurement mechanism, therefore prior art does not have the method and apparatus of live line measurement contact resistance potential difference (PD).
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provide a kind of can the measurement mechanism of live line measurement contact resistance potential difference (PD).
The purpose of this utility model realizes by following technical solution:
A kind of voltage measuring apparatus of contact resistance, for the voltage of live line measurement high tension loop contact resistance to calculate resistance, it is characterized in that: comprise closed insulation shell, be arranged at the voltage measuring apparatus in housing, be set in first on housing, secondary shielding cover, described voltage measuring apparatus is provided with and extends to first of outside, second p-wire, first, second p-wire and voltage measuring apparatus outer peripheral face are enclosed with the 3rd, 4th bell housing, described first, secondary shielding cover is corresponding to the 3rd, 4th bell housing conduction connects, described 3rd, 4th bell housing is separated by the insulator be set on the first p-wire, described first, secondary shielding cover interval arranges and intercepts gap to be formed, described first, secondary shielding overlaps relative annular edge along being formed with at least one electric discharge salient angle respectively, described first, the electric discharge salient angle of secondary shielding cover is oppositely arranged to form discharging gap.
Further, the utility model also comprises the first wireless communication module that setting is connected with voltage measuring apparatus in the housing, the terminal device being provided with the second wireless communication module, and described voltage measuring apparatus realizes data by first, second wireless communication module and terminal device and transmits.
Further, described housing is provided with insulating bar, described secondary shielding puts the resigning hole offering and pass for insulating bar, and described first wireless communication module outwards transmits data by resigning hole.
Further, described discharging gap equals the obstruct gap of 1/5-3/5.
Further, first, second bell housing described forms by around the collar of housing outer peripheral face and the shrouding of closed collar end face.
Further, the annular edge that first, second bell housing described is relative is along three the electric discharge salient angles being formed with equidistantly distribution respectively.
Further, first, second wireless communication module described is bluetooth communication or WiFi communication module.
Further, in first, second bell housing described, at least one party is movably set on housing to regulate the size of described discharging gap.
Further, described housing is cylindrical.
Further, the obstruct gap between the annular edge edge that first, second bell housing described is relative is equal everywhere.
The utility model has following beneficial effect:
Voltage measuring apparatus is arranged in the housing, and at outside first, second bell housing sheathed, first, second p-wire and voltage measuring apparatus outer peripheral face are enclosed with the 3rd, the 4th bell housing, bell housing maskable Electric and magnetic fields, prevent voltage measuring apparatus to be subject to the interference of Electric and magnetic fields, ensure the measuring accuracy of voltage measuring apparatus; Some groups of relative electric discharge salient angles are set between first, second bell housing, discharging gap is formed between relative electric discharge salient angle, discharging gap can discharge when there is transient overvoltage, fault electric arc is guided into outside housing, prevent the voltage measuring apparatus in electric arc damage housing, the circular-arc-shaped design of electric discharge salient angle can make the electric fields uniform of discharging gap, ensures that discharging gap has good electric discharge repeatability; Also by regulating discharging gap to adapt to different conditions of work; Housing arranges insulating bar, operating personnel can be convenient to and carry out high-order live line measurement, and ensure processing safety; Voltage measuring apparatus realizes radio communication by wireless communication module and terminal device, by data transfer to terminal device, thus can observe easily and record measurement result.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is functional block diagram of the present utility model.
Fig. 3 is cut-open view of the present utility model.
Embodiment
With reference to shown in Fig. 1, Fig. 2 and Fig. 3, a kind of voltage measuring apparatus of contact resistance, comprise insulation shell 1, voltage measuring apparatus 3, first bell housing 21, secondary shielding cover the 22, the 3rd bell housing 51, the 4th bell housing 52, insulator 53, first bluetooth communication 4 and mobile phone 6, wherein, the first bell housing 21, secondary shielding cover the 22, the 3rd bell housing 51, the 4th bell housing 52 are the metal material such as copper, aluminium.
Housing 1 is cylindrical, is provided with insulating bar 11 below it, and this insulating bar 11 can be the rhabodoid of scalable adjustment, housing 1 can be risen to a high position by insulating bar 11, to measure the potential difference (PD) being positioned at high-order contact resistance R, first, secondary shielding cover 21, 22 outsides being set in housing 1, first bell housing 21 forms by around the collar 211 of housing 1 outer peripheral face and the shrouding 212 of closed collar 211 end face, secondary shielding cover 22 forms by around the collar 222 of housing 1 outer peripheral face and the shrouding 223 of closed collar 222 end face, secondary shielding cover 22 offers the resigning hole 221 passed for insulating bar 11, it is inner that voltage measuring apparatus 3 is arranged on housing 1, is provided with and extends to first of housing 1 outside, second p-wire 31, 32, for measuring the potential difference (PD) at contact resistance R two ends, housing 1 and shrouding 212, 223 are formed for first, second p-wire 31, 32 resigning holes passed, the 4th bell housing 52 wraps up the second p-wire 32, voltage measuring apparatus 3 and part first p-wire the 31, three bell housing 51 wrapping portion first p-wire 31, insulator 53 is arranged on the housing 1 between the 3rd bell housing 51 and the 4th bell housing 52, wherein, first, secondary shielding cover 21, 22 by wire 331, 332 is corresponding to the 3rd, 4th bell housing 51, 52 conductions connect, and first, secondary shielding cover 21, 22 intervals arrange and intercept clearance D, first to be formed, secondary shielding cover 21, 22 relative annular edge along between obstruct clearance D equal everywhere, first, secondary shielding cover 21, 22 relative annular edge are along three the electric discharge salient angles 211 being formed with equidistantly distribution respectively, 221, first, secondary shielding cover 21, the electric discharge salient angle 211 of 22, 221 are oppositely arranged to form discharging gap L.
First bluetooth communication 4 arranges within the case 1 and is connected with voltage measuring apparatus 3, the emitting antenna 41 of the first bluetooth communication 4 is arranged near resigning hole 221, externally measurement data is sent by resigning hole 221, mobile phone 6 is built-in with the second bluetooth communication 61, voltage measuring apparatus 3 realizes data by first, second bluetooth communication 4,61 and mobile phone 6 and transmits, and mobile phone 6 receives data and display measurement result.
Concrete metering system is: by insulating bar 11, housing 1 is risen to a high position, two p-wires 31,32 of voltage measuring apparatus 3 are conducted electricity with the two ends wire of contact resistance R be connected, measurement result is sent to mobile phone 6 by first, second bluetooth communication 4,61 by voltage measuring apparatus 3, mobile phone 6 receives and display measurement result, when causing transient overvoltage when there is thunderbolt, discharging gap L discharges, fault electric arc is guided into outside housing 1, prevent the voltage measuring apparatus 3 in electric arc damage housing 1.
The above, be only preferred embodiment of the present utility model, therefore can not limit with this scope that the utility model implements, the equivalence namely done according to the utility model claim and description change with modify, all should still belong in scope that the utility model patent contains.
Claims (10)
1. the voltage measuring apparatus of a contact resistance, for the voltage of live line measurement high tension loop contact resistance to calculate resistance, it is characterized in that: comprise closed insulation shell, be arranged at the voltage measuring apparatus in housing, be set in first on housing, secondary shielding cover, described voltage measuring apparatus is provided with and extends to first of outside, second p-wire, first, second p-wire and voltage measuring apparatus outer peripheral face are enclosed with the 3rd, 4th bell housing, described first, secondary shielding cover is corresponding to the 3rd, 4th bell housing conduction connects, described 3rd, 4th bell housing is separated by the insulator be set on the first p-wire, described first, secondary shielding cover interval arranges and intercepts gap to be formed, described first, secondary shielding overlaps relative annular edge along being formed with at least one electric discharge salient angle respectively, described first, the electric discharge salient angle of secondary shielding cover is oppositely arranged to form discharging gap.
2. the voltage measuring apparatus of a kind of contact resistance according to claim 1, it is characterized in that: also comprise the first wireless communication module that setting is connected with voltage measuring apparatus in the housing, the terminal device being provided with the second wireless communication module, described voltage measuring apparatus realizes data by first, second wireless communication module and terminal device and transmits.
3. the voltage measuring apparatus of a kind of contact resistance according to claim 2, it is characterized in that: described housing is provided with insulating bar, described secondary shielding puts the resigning hole offering and pass for insulating bar, and described first wireless communication module outwards transmits data by resigning hole.
4. the voltage measuring apparatus of a kind of contact resistance according to claim 1 or 2 or 3, is characterized in that: described discharging gap equals the obstruct gap of 1/5-3/5.
5. the voltage measuring apparatus of a kind of contact resistance according to claim 1 or 2 or 3, is characterized in that: described electric discharge salient angle is circular arc.
6. the voltage measuring apparatus of a kind of contact resistance according to claim 1 or 2 or 3, is characterized in that: the annular edge edge that first, second bell housing described is relative is formed with three electric discharge salient angles of equidistantly distribution respectively.
7. the voltage measuring apparatus of a kind of contact resistance according to claim 1 or 2 or 3, is characterized in that: first, second wireless communication module described is bluetooth communication or WiFi communication module.
8. the voltage measuring apparatus of a kind of contact resistance according to claim 1 or 2 or 3, is characterized in that: in first, second bell housing described, at least one party is movably set on housing to regulate the size of described discharging gap.
9. the voltage measuring apparatus of a kind of contact resistance according to claim 1 or 2 or 3, is characterized in that: first, second bell housing described forms by around the collar of housing outer peripheral face and the shrouding of closed collar end face.
10. the voltage measuring apparatus of a kind of contact resistance according to claim 1 or 2 or 3, is characterized in that: the obstruct gap between the annular edge edge that first, second bell housing described is relative is equal everywhere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420682156.8U CN204241540U (en) | 2014-11-14 | 2014-11-14 | A kind of voltage measuring apparatus of contact resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420682156.8U CN204241540U (en) | 2014-11-14 | 2014-11-14 | A kind of voltage measuring apparatus of contact resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204241540U true CN204241540U (en) | 2015-04-01 |
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ID=52771021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420682156.8U Expired - Fee Related CN204241540U (en) | 2014-11-14 | 2014-11-14 | A kind of voltage measuring apparatus of contact resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204241540U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360133A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistance voltage measuring device |
-
2014
- 2014-11-14 CN CN201420682156.8U patent/CN204241540U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360133A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistance voltage measuring device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20211114 |