CN2741058Y - Voltage dropping analog tester of switching contacts - Google Patents
Voltage dropping analog tester of switching contacts Download PDFInfo
- Publication number
- CN2741058Y CN2741058Y CN 200420086715 CN200420086715U CN2741058Y CN 2741058 Y CN2741058 Y CN 2741058Y CN 200420086715 CN200420086715 CN 200420086715 CN 200420086715 U CN200420086715 U CN 200420086715U CN 2741058 Y CN2741058 Y CN 2741058Y
- Authority
- CN
- China
- Prior art keywords
- switch
- power supply
- contact
- voltage
- voltage table
- 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 - Fee Related
Links
- 238000004088 simulation Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000000069 prophylactic effect Effects 0.000 description 1
Images
Landscapes
- Keying Circuit Devices (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses a voltage dropping analog tester of switching contacts, which is formed by that a voltmeter is connected with the output end of the special AC power supply in parallel. Under the condition that the switch is not electrified, the output end of the power supply is connected with the both sides of the tested switch and then the output current of the power supply is adjusted to make the value of the current achieve the rated value of the tested switch. The reading of the voltmeter approximates the equivalence of the voltage drop in a contact loop when the switch is in a normal running state. The staff can judge the fault rate of the contact according to the value of the voltage drop so as to carry out the maintenance in time.
Description
Affiliated technical field
The utility model relates to a kind of device that is used to detect high-voltage switch.
Background technology
High-voltage switch (hereinafter to be referred as switch) is one of major equipment of forming electric system.Along with the increase of open and close times, when especially repeatedly cut-offfing fault current (annotate: this current value is very big), the contact of switch might be by electric arc burn.After contact is burnt to a certain degree, will cause the switch heating, even switch is burnt sometimes.Because the contact of most switches all is to be sealed in the porcelain bushing shell or casing with arc-extinguishing medium (except the vacuum switch), its damaged condition just can be seen after having only power failure and disintegration.Therefore how accurately to judge the damaged condition of contact and in time overhaul that this is a difficult problem that exists in the electric system always.
For solving an above difficult problem, adopt following several ways usually: the one, every switch failure tripping operation (back switch automatic cutout promptly has an accident) is carried out strip inspection after reaching the number of times of regulation.Reached though the drawback of this way is a part of switch tripping operation number of times, the back of disintegrating finds that its contact does not suffer badly damaged.In other words, this part switch need not disintegrate, and still can continue operation.The 2nd, the product of switching current value and switch working time is added up, after reaching certain numerical value, promptly carry out strip inspection.The drawback of this way is identical with first kind of way.In addition, I propose voltage table and operating switch contact loop are in parallel in utility model patent 02258913.9, and the damaged condition of contact is judged in the pressure drop on the contact loop according to the switch working current.This way is in running status owing to switch, therefore implements to have certain difficulty.
Summary of the invention
The purpose of this utility model is exactly that a kind of new switch contact drop simulation proving installation will be provided, and it can be under the switch power-off condition, the pressure drop under the simulation test switch running status on the contact loop.So that the staff judges the damaged condition of switch contact and in time overhauls.
The purpose of this utility model is achieved in that and adopts an AC power (hereinafter to be referred as power supply) and a voltage table, terminals of voltage table are connected with an output terminal of power supply, another terminals of voltage table are connected with another output terminal of power supply.Under the uncharged situation of switch, two output terminals of above-mentioned power supply are connected on the both sides of switch respectively, electric current when making the switch contact current in loop equal the switch operate as normal, this moment, the reading of voltage table was Approximate Equivalent pressure drop on the contact loop when the switch operate as normal.Because this voltage drop value is directly proportional with the damaged condition of switch contact, so the staff can judge the damaged condition of switch contact and determine whether to disintegrate maintenance according to the size of voltage drop value.
Therefore the utility model proposes operating switch is tested much safe in 02258913.9 than me because be to test after the switch power failure.Its cost expense more required than switch strip inspection is much less, and be therefore both economical.But the more important thing is to make switch become in case of necessity just maintenance, can significantly reduce switch power off time in use like this by original prophylactic repair.Match with the charged detection of other high voltage installation in the system, also can reduce the power off time of total system, its social benefit and economic benefit are conspicuous.
Description of drawings
Accompanying drawing is a tie lines synoptic diagram of the present utility model.
1. line of electric force among the figure, 2. disconnecting link, 3. switch, 4. disconnecting link, 5. connecting line, 6. voltage table, 7. AC power, 8. connecting line.
Embodiment
As shown in the figure: switch (3) is serially connected in (annotate: switch herein is also referred to as " isolating switch ", and disconnecting link is also referred to as " disconnector ") in the line of electric force (1) by disconnecting link (2) and disconnecting link (4).Terminals of voltage table (6) are connected with an output terminal of AC power (7), and another terminals of voltage table (6) are connected with another output terminal of AC power (7).The inner structure of above-mentioned power supply is similar to existing A.C. welder on the market, is characterized in that the strength of current of exporting can reach several kiloamperes, rated operational current that like this can analog switch (3).Before the test, at first switch (3) is disconnected, again disconnecting link (2) and disconnecting link (4) are disconnected,, switch (3) and line of electric force (1) are kept apart (this belongs to working specification) like this by disconnecting link (2) and disconnecting link (4).When testing, two output terminals of above-mentioned power supply are connected on the both sides of switch (3) respectively by connecting line (8) and connecting line (5),, promptly have electric current to pass through in the switch loop then with switch (3) closure.Regulate the output current of power supply, make current in loop reach the ratings of switch (3), this moment, the reading of voltage table was Approximate Equivalent pressure drop on the contact loop when the switch operate as normal.
Strictly, because connecting line (5) all has contact resistance when being connected with the switch both sides with connecting line (8), source current all has pressure drop on this contact resistance, therefore for reducing measuring error, also can adopt special line that voltage table (6) is directly parallel on the contact loop of switch (3).
Though what the utility model adopted is general electric device and instrument, the simulation test of using it for high-voltage switch gear still is unprecedented.
Claims (1)
- Switch contact drop simulation proving installation, this device mainly is made up of AC power and voltage table, it is characterized in that terminals of voltage table are connected with an output terminal of power supply, another terminals of voltage table are connected with another output terminal of power supply, so that when power supply and switch contact loop are connected, measure the pressure drop of source current on the contact loop with voltage table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420086715 CN2741058Y (en) | 2004-07-21 | 2004-07-21 | Voltage dropping analog tester of switching contacts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420086715 CN2741058Y (en) | 2004-07-21 | 2004-07-21 | Voltage dropping analog tester of switching contacts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2741058Y true CN2741058Y (en) | 2005-11-16 |
Family
ID=35351345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420086715 Expired - Fee Related CN2741058Y (en) | 2004-07-21 | 2004-07-21 | Voltage dropping analog tester of switching contacts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2741058Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7868619B2 (en) | 2008-12-19 | 2011-01-11 | Abb Oy | Method and arrangement for monitoring connections of switch intended for activating safety function |
| CN102193017A (en) * | 2010-03-18 | 2011-09-21 | 中国科学院电子学研究所 | Indirect test method for voltage drops on relay contacts |
| CN103576046A (en) * | 2012-07-26 | 2014-02-12 | 罗伯特·博世有限公司 | Storage battery system having storage battery protector and diagnostic device, and diagnostic method thereof |
-
2004
- 2004-07-21 CN CN 200420086715 patent/CN2741058Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7868619B2 (en) | 2008-12-19 | 2011-01-11 | Abb Oy | Method and arrangement for monitoring connections of switch intended for activating safety function |
| CN101752842B (en) * | 2008-12-19 | 2014-07-30 | Abb公司 | Method and arrangement for monitoring connections of switch intended for activating safety function |
| CN102193017A (en) * | 2010-03-18 | 2011-09-21 | 中国科学院电子学研究所 | Indirect test method for voltage drops on relay contacts |
| CN103576046A (en) * | 2012-07-26 | 2014-02-12 | 罗伯特·博世有限公司 | Storage battery system having storage battery protector and diagnostic device, and diagnostic method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102072997B (en) | Spare automatic switching logic test method for checking main transformer mutual switching mode | |
| CN203658544U (en) | Pole mounted switch action test device | |
| CN101499655B (en) | Neutral point grounding resistor plant for electrical power system | |
| CN201984144U (en) | Spot differential coordination tester of portable direct current breaker | |
| CN102436773B (en) | Analog circuit breaker | |
| CN102023271A (en) | Spare power automatic switching logic test method for verifying automatic switching modes of high voltage side buscouple switch | |
| CN203054118U (en) | Short-circuit protection test apparatus for IGBT power unit | |
| CN204694822U (en) | A kind of short-circuit protection field test device of distribution system low-voltage circuit breaker | |
| CN106329497B (en) | A kind of distribution network failure self-healing dead zone elimination method based on protection for feed line principle of simulation | |
| CN203278210U (en) | Busbar residual voltage maintaining device | |
| CN201662616U (en) | Online monitor ammeter calibration device of lightning arrester | |
| CN102662118B (en) | Based on the differential cooperation method of testing of electric power DC system protective device of record ripple mode | |
| CN2741058Y (en) | Voltage dropping analog tester of switching contacts | |
| CN202049657U (en) | Simulation circuit breaker | |
| CN103151196B (en) | State indicating instrument of three-working-position operating mechanism of high-voltage switch cabinet and state indicating method thereof | |
| CN216747993U (en) | Vacuum circuit breaker short-circuit current breaking capacity detection device | |
| CN201386894Y (en) | Startup circuit for emergency DC oil pump in lubricant station | |
| CN211627713U (en) | Portable Test Device | |
| CN207882372U (en) | Comprehensive protector of motor tester | |
| CN209373076U (en) | A kind of prepared auto restart quick checking device | |
| CN102931632B (en) | Current leakage protection circuit with working status display and real-time fault display functions | |
| CN202600032U (en) | All-loop electroscope | |
| CN207926263U (en) | Switchgear assembly with alternative DC control supply | |
| CN102095951A (en) | Spare power automatic switching logic test method for checking automatic switching mode of low-pressure side section switch | |
| CN209028169U (en) | A kind of high voltage display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |