CN203133177U - Electric megohmmeter capable of resisting interference of strong electric field in power delivery line - Google Patents
Electric megohmmeter capable of resisting interference of strong electric field in power delivery line Download PDFInfo
- Publication number
- CN203133177U CN203133177U CN 201320117273 CN201320117273U CN203133177U CN 203133177 U CN203133177 U CN 203133177U CN 201320117273 CN201320117273 CN 201320117273 CN 201320117273 U CN201320117273 U CN 201320117273U CN 203133177 U CN203133177 U CN 203133177U
- Authority
- CN
- China
- Prior art keywords
- unit
- megohmmeter
- output
- output terminal
- interference
- 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 - Lifetime
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to an electric megohmmeter capable of resisting interference of a strong electric field in a power delivery line. A control calculating unit emits a signal to control a motor to drive a generator to start, direct current is generated and output to test an insulation resistor under the protection of the output, and data is collected by a sampling unit, transmitted to the control calculating unit via an anti-interference low-pass filtering unit to be calculated and then displayed by a display unit. Through the electric megohmmeter, engineering construction safety and a situation that interference current cannot be resisted under interference of the strong electric field due to the low output current are comprehensively considered, so that the most accurate test result can be realized.
Description
Technical field
The utility model relates to a kind of electronic megohmmeter, relates in particular to a kind of anti-highfield and disturbs the electronic megohmmeter of power transmission sequence, is applicable to that mainly a loop line road of joint using is charged, and another loop line drive test examination insulation resistance belongs to the intelligent substation technical field.
Background technology
For the power transmission sequence of joint using, charged when a loop line road, be a relatively stubborn problem at another loop line drive test examination insulation resistance.The conventional manual megohmmeter has certain threat because of the induced voltage height to the tester, and the electronic megohmmeter that uses at present is too big because of internal resistance, the electric current of output is little can't resist interference current, the insulation resistance data that cause testing are far smaller than actual value, even can't correctly to test be to need at present the urgent problems that solve.
Summary of the invention
The utility model is at above-mentioned problems of the prior art; according to test insulation resistance principle; by housing shroud and the direct current protecting of taking electronic megohmmeter; provide a kind of anti-highfield to disturb the electronic megohmmeter of power transmission sequence, solved in the prior art because of work construction safety and the little problem that can't correctly test the power transmission sequence insulation resistance of electronic megohmmeter output current.
The technical solution of the utility model is as follows:
Comprise housing; the inside of housing arranges the control computing unit; the output terminal of control computing unit connects display unit, motor and generator; the output terminal of motor connects generator; the output terminal of generator connects the direct current output unit; the output terminal of direct current output unit connects output protection unit and sampling unit, and the sampling unit output terminal connects anti-interference low-pass filter unit, and the output terminal of anti-interference low-pass filter unit connects the control computing unit.
Described housing adopts metallic shield and protective ground.
Described output protection unit is provided with the equipotential protection ring.
Described motor speed is 120r/min.
The utility model has the advantages of as follows:
1, output voltage: 5000V, measurement range: 0-100000M Ω, measuring accuracy: 20%.
2, stop to take place because of the high human body electrification accident that takes place of induced voltage.
3, the warranty test data is accurate and stable.
4, the little interference current of can't resisting of output current was taken all factors into consideration under the utility model disturbed engineering construction safety, highfield, reached accurate test result.
Description of drawings
Fig. 1 is the utility model structural representation block diagram.
Fig. 2 uses wiring schematic diagram for the utility model.
Among the figure, 1, circuit mark post tower, 2, line insulator, 3, wiring.
Embodiment
Embodiment
Comprise housing, housing adopts metallic shield and protective ground; The inside of housing arranges the control computing unit; the output terminal of control computing unit connects display unit, motor and generator; the output terminal of motor connects generator; the output terminal of generator connects the direct current output unit; the output terminal of direct current output unit connects output protection unit and sampling unit; the sampling unit output terminal connects anti-interference low-pass filter unit, and the output terminal of anti-interference low-pass filter unit connects the control computing unit.
Described output protection unit is provided with the equipotential protection ring.
Described motor speed is 120r/min.
Output short circuit current is 5mA.
The anti-highfield of the utility model disturbs the method for testing of the electronic megohmmeter of power transmission sequence, comprises the steps:
The control computing unit sends signal control motor and drives the generator startup; the output of generation direct current; under output protection, carry out direct current output test insulation resistance; by the sampling unit image data; be transferred to the control computing unit by anti-interference low-pass filter unit and calculate, show data by display unit.
On Dec 10th, 2012 tested the utility model, 220kV Shen Ping A-wire has a power failure it is carried out track remodelling, the 220kV Shen Ping second line of joint using is in electriferous state, use the utility model test insulation resistance, test value is 3100M Ω, uses conventional electric megohmmeter test value only to be 7M Ω.
On Dec 15th, 2012 tested the utility model, 220kV Shen Ping second line has a power failure, use conventional manual megohmmeter test Shen Ping A-wire insulating resistance value to be 3500M Ω, use conventional electric megohmmeter test Shen Ping A-wire insulating resistance value to be 3550M Ω, use the utility model test insulating resistance value to be 3400M Ω.
On January 15th, 2013 tested the utility model, and 66kV wins the aging replacing of two line line facilities, wins two lines in 40 fens of power failures in 9 o'clock, won two two wires in 20 fens of power failures simultaneously in 10 o'clock.The test of 9 o'clock 45 fens of use the utility model wins two line insulation resistances, and test value is 2800M Ω, uses conventional electric megohmmeter test value only to be 15M Ω.10 o'clock 40 points use conventional manual megohmmeter test to win two line insulating resistance values to be 3300M Ω, to use conventional electric megohmmeter test Shen Ping A-wire insulating resistance value to be 3450M Ω, use the utility model to test insulating resistance value and be 3400M Ω.
Draw by test figure, use the correctly insulating resistance value of measurement circuit of conventional electric megohmmeter when the circuit of joint using is charged, the data of using data that the utility model tests out and two loop line roads to have a power failure simultaneously to test out are very nearly the same, the requirement of satisfied 20% degree of accuracy.
Claims (4)
1. anti-highfield disturbs the electronic megohmmeter of power transmission sequence; comprise housing; the inside that it is characterized in that housing arranges the control computing unit; the output terminal of control computing unit connects display unit, motor and generator; the output terminal of motor connects generator; the output terminal of generator connects the direct current output unit; the output terminal of direct current output unit connects output protection unit and sampling unit; the sampling unit output terminal connects anti-interference low-pass filter unit, and the output terminal of anti-interference low-pass filter unit connects the control computing unit.
2. anti-highfield according to claim 1 disturbs the electronic megohmmeter of power transmission sequence, it is characterized in that described housing adopts metallic shield and protective ground.
3. anti-highfield according to claim 1 disturbs the electronic megohmmeter of power transmission sequence, it is characterized in that described output protection unit is provided with the equipotential protection ring.
4. anti-highfield according to claim 1 disturbs the electronic megohmmeter of power transmission sequence, it is characterized in that described motor speed is 120r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320117273 CN203133177U (en) | 2013-03-14 | 2013-03-14 | Electric megohmmeter capable of resisting interference of strong electric field in power delivery line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320117273 CN203133177U (en) | 2013-03-14 | 2013-03-14 | Electric megohmmeter capable of resisting interference of strong electric field in power delivery line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203133177U true CN203133177U (en) | 2013-08-14 |
Family
ID=48941147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320117273 Expired - Lifetime CN203133177U (en) | 2013-03-14 | 2013-03-14 | Electric megohmmeter capable of resisting interference of strong electric field in power delivery line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203133177U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176046A (en) * | 2013-03-14 | 2013-06-26 | 辽宁省电力有限公司抚顺供电公司 | Anti-highfield-interference transmission line electric megameter and testing method thereof |
| CN104166048A (en) * | 2014-07-25 | 2014-11-26 | 广西电网公司电力科学研究院 | Power frequency interference resistant insulation resistor testing apparatus and testing method based on resonance network |
-
2013
- 2013-03-14 CN CN 201320117273 patent/CN203133177U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176046A (en) * | 2013-03-14 | 2013-06-26 | 辽宁省电力有限公司抚顺供电公司 | Anti-highfield-interference transmission line electric megameter and testing method thereof |
| CN104166048A (en) * | 2014-07-25 | 2014-11-26 | 广西电网公司电力科学研究院 | Power frequency interference resistant insulation resistor testing apparatus and testing method based on resonance network |
| CN104166048B (en) * | 2014-07-25 | 2017-02-15 | 广西电网公司电力科学研究院 | Power frequency interference resistant insulation resistor testing apparatus and testing method based on resonance network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203773010U (en) | Partial discharge on-line monitoring instrument based on switch cabinet charge indicator | |
| CN107390081A (en) | It is a kind of to be used for the device and method being monitored powered to deformation of transformer winding | |
| CN103513161A (en) | Power transmission and transformation system fault searching locating instrument and searching method | |
| CN207181589U (en) | It is a kind of to be used for the device being monitored powered to deformation of transformer winding | |
| CN108535576A (en) | Multichannel power quality analysis device based on 3G network | |
| CN105092971A (en) | Pure electric high-voltage insulated resistance real-time online detection method | |
| CN203133177U (en) | Electric megohmmeter capable of resisting interference of strong electric field in power delivery line | |
| CN103018525B (en) | Transformer station's internal short-circuit distribution of current is carried out to the apparatus and method of synchro measure | |
| CN103884930A (en) | Full bridge uncontrolled rectifier fault diagnosis method based on insulation monitoring | |
| CN207067294U (en) | A kind of down conductor continuity test instrument | |
| CN103176046A (en) | Anti-highfield-interference transmission line electric megameter and testing method thereof | |
| CN205157654U (en) | Mounting structure of ground resistance test system | |
| CN205656242U (en) | Shaft tower impulse grounding resistance measurement appearance that contains spark effect correction function | |
| CN208172234U (en) | A kind of no-load voltage ratio of current transformer, Check up polarity experimental rig | |
| CN204719218U (en) | Lightning arrester monitor calibration equipment | |
| CN107843759A (en) | The surge current test system and method for testing of electronic equipment in spacecraft | |
| CN204439820U (en) | Once-through type lightning arrester on-Line Monitor Device detector | |
| CN204789763U (en) | Circuit iron tower ground net impulse grounding impedance measuring apparatu | |
| CN203929896U (en) | Anti-explosion digital earth resistance tester | |
| CN204044249U (en) | A kind of proving installation of stake resistance | |
| CN202956466U (en) | Fault point seeking instrument for alternating current high-voltage and low-current grounding system | |
| CN202676807U (en) | A ground resistance measuring device | |
| CN103278729B (en) | Hi-pot test ground connection condition tester | |
| CN203025236U (en) | Device for synchronously measuring short circuit current distribution in transformer station | |
| CN202083766U (en) | High voltage grounding line selection apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |