CN202502159U - Dynamic resistance testing device - Google Patents
Dynamic resistance testing device Download PDFInfo
- Publication number
- CN202502159U CN202502159U CN2012201237608U CN201220123760U CN202502159U CN 202502159 U CN202502159 U CN 202502159U CN 2012201237608 U CN2012201237608 U CN 2012201237608U CN 201220123760 U CN201220123760 U CN 201220123760U CN 202502159 U CN202502159 U CN 202502159U
- Authority
- CN
- China
- Prior art keywords
- switch
- dynamic resistance
- resistance testing
- switch board
- contact
- 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
Abstract
The utility model relates to a dynamic resistance testing device, comprising a switch tester, a breaker and a control cabinet, wherein the switch tester comprises a power supply device, a testing device and a control device, two ends of the breaker are connected with the power supply device through current wires and are connected with the testing device through voltage testing wires, the control device is connected with a positive terminal of the control cabinet through a conducting wire, and is connected with a negative terminal of the control cabinet in parallel through a closing coil and a breaking coil respectively. The dynamic resistance testing device has the advantages of simple device, not strict requirement for current, accurate measurement, and the like.
Description
Technical field
The utility model relates to a kind of testing apparatus, especially relates to a kind of dynamic resistance testing apparatus.
Background technology
According to relevant regulations, the galvanic circle resistance test is the indispensable routine test project of isolating switch, to detect the contact condition between the isolating switch main contact.According to relevant regulations, the galvanic circle resistance test adopts the direct current pressure decline method to carry out, and test current is not less than 100A.Generally speaking, the on-the-spot test apparatus of 100～600A that uses carries out the galvanic circle resistance test, receives the restriction of capacity, and the instrument test electric current of galvanic circle resistance test is carried out generally all below 1000A in the scene.But can find out the contact condition of contact of breaker when the test current below the 1000A often can't accurately detect running status from the test findings of this paper prosthomere.Therefore when carrying out GCB galvanic circle resistance test gained result with General Instrument when bigger than normal, should directly not judge the loose contact of GCB contact, should strengthen test current and test.When increase along with test current, and the growth of through-flow time, when GCB galvanic circle resistance test result no longer changes, can think to have obtained the galvanic circle resistance value under the GCB operating condition.
Conducting heavy current loop resistance test can be taked dual mode: directly test with bigger DC current, need to provide several thousand and even up to ten thousand amperes testing tool; Earlier the GCB arc-chutes are passed through bigger alternating current, after through-flow a period of time, carry out the galvanic circle resistance test with General Instrument again.As use second method; According to the in vitro cranking test result of the Tongbai accumulation of energy GCB of company; Must using at least, the alternating current of 3500A passes through GCB after a period of time; Just can obtain desirable galvanic circle resistance test result, difference as the case may be, required test current and through-flow time can change to some extent.For first method, preliminary deduction can obtain the effect approximate with second method, but since at present test apparatus temporarily do not have concrete test figure also in development.
GCB is a kind of pot type SF
6Isolating switch, it comprises main contact and arcing contact.Generally speaking, main contact adopts the silver-plated material of copper, and resistance is very little, and arcing contact adopts the material of tungalloy, and compare resistance with main contact bigger, but it is high temperature resistant.During operation, GCB is in "on" position, and main contact and arcing contact are in parallelly connected state, and the resistance of main contact is far smaller than the resistance of arcing contact; When the GCB sub-switching operation, main contact at first separates, after after a while after (several millisecond); Arcing contact separates again, and during this period of time, electric current is transferred on the arcing contact from main contact; Utilize the resistance to elevated temperatures of arcing contact, by arcing contact through arcing, breath arc process, breaking current.
Pass through arcing, breath arc process breaking current owing to cut-off all at every turn by arcing contact, caused ablation, though arcing contact has adopted the material of this high temperature resistant ablation of tungalloy to the arcing contact material; But this ablation still exists, and has caused arcing contact to shorten gradually, and main, arcing contact disengaging time is also corresponding at interval progressively to shorten; After reducing to a certain degree this interval time, in the separating brake process, will be not enough to after main contact separates; Make current transfer to arcing contact; At this moment will be directly arcing on main contact be the silver-plated material of the little copper of resistivity because main contact adopts, non-refractory; Therefore will be burnt by the high temperature that produces in the arcing process, cause equipment breakdown.Guarantee leading, the GCB arc-chutes carried out large repairs before a certain safety value that the arcing contact disengaging time reduces at interval.We the GCB electrical endurance that will detect just detect the ablation degree of arcing contact, this can pass through certain method of testing, detects that main contact separates and the arcing contact separation time realizes at interval.
The utility model content
The purpose of the utility model be exactly provide in order to overcome the defective that above-mentioned prior art exists a kind of device simply, current requirements is not high, measure dynamic resistance testing apparatus accurately.
The purpose of the utility model can realize through following technical scheme:
A kind of dynamic resistance testing apparatus; Comprise switch testing appearance, isolating switch and switch board; Described switch testing appearance comprises supply unit, proving installation and control device; Described isolating switch two ends are connected with supply unit through the electric current line, are connected with proving installation through the voltage tester line, and described control device is connected with switch board.
Described isolating switch is a kind of pot type SF
6Isolating switch is provided with main contact and arcing contact.
Described switch board is provided with positive source and power cathode.
Described control device is connected with the positive source of switch board through lead, and the power cathode through closing coil and breaking coil and switch board is connected in parallel respectively.
Compared with prior art, the utility model device is simple, current requirements is not high, it is accurate to measure.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
A kind of dynamic resistance testing apparatus; Its structure is as shown in Figure 1; Comprise switch testing appearance, isolating switch 4 and switch board 5, the switch testing appearance comprises supply unit 1, proving installation 2 and control device 3, and isolating switch 4 two ends are connected with supply unit 1 through the electric current line; Be connected with proving installation 2 through the voltage tester line, control device 3 is connected with switch board 5.
Isolating switch 4 is a kind of pot type SF
6Isolating switch is provided with main contact and arcing contact.Switch board 5 is provided with positive source 6 and power cathode 7.Control device 3 is connected with the positive source 6 of switch board 5 through lead, and the power cathode 7 through closing coil and breaking coil and switch board 5 is connected in parallel respectively.
When isolating switch 4 closes a floodgate, it is passed to certain direct current resistance, then isolating switch 4 is carried out sub-switching operation; In whole process; Test loop changes in resistance situation through the changes in resistance curve, can obtain main contact, arcing contact disengaging time at interval; With the limit value in this time interval relatively, can obtain the last electrical endurance of isolating switch 4.
Claims (4)
1. dynamic resistance testing apparatus; It is characterized in that; Equipment comprises switch testing appearance, isolating switch and switch board, and described switch testing appearance comprises supply unit, proving installation and control device, and described isolating switch two ends are connected with supply unit through the electric current line; Be connected with proving installation through the voltage tester line, described control device is connected with switch board.
2. a kind of dynamic resistance testing apparatus according to claim 1 is characterized in that described isolating switch is a kind of pot type SF
6Isolating switch is provided with main contact and arcing contact.
3. a kind of dynamic resistance testing apparatus according to claim 1 is characterized in that described switch board is provided with positive source and power cathode.
4. a kind of dynamic resistance testing apparatus according to claim 3 is characterized in that, described control device is connected with the positive source of switch board through lead, and the power cathode through closing coil and breaking coil and switch board is connected in parallel respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201237608U CN202502159U (en) | 2012-03-28 | 2012-03-28 | Dynamic resistance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201237608U CN202502159U (en) | 2012-03-28 | 2012-03-28 | Dynamic resistance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202502159U true CN202502159U (en) | 2012-10-24 |
Family
ID=47038769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201237608U Expired - Lifetime CN202502159U (en) | 2012-03-28 | 2012-03-28 | Dynamic resistance testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202502159U (en) |
-
2012
- 2012-03-28 CN CN2012201237608U patent/CN202502159U/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102072997A (en) | Spare automatic switching logic test method for checking main transformer mutual switching mode | |
| CN106696708A (en) | Method for judging contactor adhesion failure in high voltage circuit with battery in electric car | |
| CN202562733U (en) | High voltage breaker mechanical property on-line live-line detection system | |
| CN110031756B (en) | DC contactor performance test conversion circuit and service life test method | |
| CN102183728B (en) | Method for detecting electrical state of high-voltage circuit breaker | |
| CN202854297U (en) | Relay performance test device for automobile | |
| CN202502159U (en) | Dynamic resistance testing device | |
| CN102169164A (en) | Method for detecting burning loss condition of arcing contact of high-voltage breaker | |
| CN207263597U (en) | A kind of circuit connection structure of corrosion monitor selecting switch | |
| CN107478889B (en) | Electromagnetic type short-circuit current rapid identification device and method | |
| CN201359623Y (en) | DC high-voltage forcipated current measuring device | |
| CN208999069U (en) | A kind of small size breaker device iron core detection fixture | |
| CN207636718U (en) | A kind of circuit-breaker testing repairing auxiliary device | |
| CN102255289A (en) | Thyristor alternating current power regulator control system and application thereof in electrical heating temperature control | |
| CN201903604U (en) | Fusing characteristic test device for automobile-used fusible wire | |
| CN205484750U (en) | Magnetic induction loop testing arrangement | |
| CN216560850U (en) | Mineral insulated cable voltage-withstanding detection device | |
| CN205450208U (en) | Testing arrangement of vacuum circuit breaker | |
| CN220650785U (en) | Low-voltage heavy-current wire quality safety detection experimental device | |
| CN112180247B (en) | Concentrated online test method for operating mechanisms of vacuum circuit breakers of high-voltage cabinets in line | |
| CN203164228U (en) | Test clamp of switch contact resistance | |
| CN210294433U (en) | Quick cutting device for temperature rise test of transformer | |
| CN220691061U (en) | Detection device of high-voltage circuit breaker of LF (ladle furnace) electric equipment | |
| CN104483192B (en) | Method for processing static fusion welding force data of electrical contact material based on Weibull distribution | |
| CN102749537A (en) | Method for testing performance of trip outlet contact of relay protection device |
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: 20121024 |