CN213240376U - Power frequency voltage-withstanding instrument with fault point positioning - Google Patents
Power frequency voltage-withstanding instrument with fault point positioning Download PDFInfo
- Publication number
- CN213240376U CN213240376U CN202020450602.8U CN202020450602U CN213240376U CN 213240376 U CN213240376 U CN 213240376U CN 202020450602 U CN202020450602 U CN 202020450602U CN 213240376 U CN213240376 U CN 213240376U
- Authority
- CN
- China
- Prior art keywords
- current
- voltage
- high voltage
- fault point
- instrument
- 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
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a power frequency withstand voltage appearance of fault point location, including current-limiting resistance unit and leakage alarm unit, current-limiting resistance unit includes two resistances and the equal different current-limiting resistance of power, and two current-limiting resistance accessible high-pressure switching device are at the operating condition resistance of difference, the leakage alarm unit has not only need the function that can set for wantonly in a stepless manner, and guarantees the restriction of enough big maximum leakage current, the utility model discloses a special high-voltage output current-limiting circuit and alarm circuit have both satisfied conventional withstand voltage test, can judge concrete insulation defect again, have guaranteed the safe and reliable operation of instrument, are convenient for judge by the good or bad of sample owner insulating properties, also need judge the concrete fault point of defective products simultaneously, restore the defective products.
Description
Technical Field
The utility model relates to a withstand voltage appearance technical field especially relates to a power frequency withstand voltage appearance of fault point location.
Background
The quality of motor insulation directly relates to personal safety and reliable operation of equipment, and power frequency voltage-resistant test items are listed as safety mandatory standard items in the standards of GB 755-2012 'quota and performance of a rotating motor', GB 14711-2013 'general safety requirements of small and medium rotating motors' and GB 12350-2016 'safety requirements of small-power motors' in the practical implementation.
The power frequency voltage withstand test is one of main methods for checking the main insulation of the motor, and according to corresponding test standards, a voltage withstand tester outputs corresponding test voltage to be applied to the tested motor, and then whether the main insulation of the tested motor meets the requirements is judged by monitoring whether the leakage current exceeds an allowable value. However, the conventional voltage withstand instrument can only judge the defective motor insulation product, cannot judge the specific defect position, and is inconvenient to repair. This is because, according to the relevant standard of the operation of the voltage withstanding instrument, the resistance value of the current limiting resistor connected in series with the high-voltage output circuit of the voltage withstanding instrument is 1/10 (the resistance value is large, and the voltage drop is increased) of the rated output high voltage of the voltage withstanding instrument, so that once the tested article has an insulation breakdown short-circuit fault, the high-voltage circuit of the voltage withstanding instrument generates a current of about 10A, while the voltage withstanding instrument is designed and produced according to the standard with the high-voltage circuit 1A, and the voltage withstanding instrument cannot bear a long-term large-current operation, so that once the conventional voltage withstanding instrument judges that the tested article is unqualified, the high-voltage output is immediately cut off, and a tester cannot observe a flickering phenomenon, cannot. The purpose of the test performed by the user is to judge the main insulation performance of the tested product, and also to judge the specific fault point of the defective product and repair the defective product. Therefore, the user needs the equipment supplier to provide a pressure-resistant instrument capable of finding the fault point.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a power frequency voltage-withstanding instrument with a positioned fault point.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a power frequency withstand voltage appearance of fault point location, includes current-limiting resistance unit and leakage alarm unit, current-limiting resistance unit includes the equal different current-limiting resistance of two resistances and power, and two current-limiting resistance accessible high voltage switching device are at the operating condition resistances of difference, leakage alarm unit can set for leakage current's function wantonly, and guarantees the restriction of the maximum leakage current of big enough.
Preferably, the high-voltage insulation testing device further comprises a withstand voltage detection system, the withstand voltage detection system comprises a high-voltage generation main body and an alarm circuit, the high-voltage generation main body can change the high-voltage output current-limiting resistor, the withstand voltage instrument can output a test high voltage to a test object to perform main insulation testing through the high-voltage generation main body, and the alarm current limit value of the alarm circuit and the high-voltage generation main body can change the high-voltage output current-limiting resistor.
Preferably, the high voltage generation main body is a vacuum relay with the withstand voltage of 20kV, and the current limiting resistor adopts a wire-wound resistor with the voltage of 5kW/4.5k ohm
The utility model has the advantages that:
1. the voltage-resistant instrument not only meets the conventional voltage-resistant test, but also can judge the specific insulation defect through a special high-voltage output current-limiting circuit and an alarm circuit.
2. The voltage-resistant instrument further selects a high-voltage-resistant vacuum relay and a high-power current-limiting resistor, ensures the safe and reliable operation of the instrument, is convenient for judging the quality of the main insulating property of a tested product, and simultaneously needs to judge the specific fault point of a defective product and repair the defective product.
Drawings
Fig. 1 is a flow chart of a power frequency voltage-withstanding instrument with a fault point located according to the present invention;
fig. 2 is a general block diagram of a power frequency voltage-withstanding instrument with a fault point located according to the present invention;
fig. 3 is the utility model provides a schematic diagram of a power frequency voltage-withstanding instrument with fault point location.
In the figure: 1 current-limiting resistance unit and 2 leakage alarm unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-2, a power frequency voltage-withstanding instrument with a fault point positioned comprises a current-limiting resistance unit 1 and a leakage alarm unit 2, wherein the current-limiting resistance unit selects two current-limiting resistances with different resistances and different powers, and is switched to a current-limiting resistance for point alignment in different working states through a high-voltage switching device, the leakage alarm unit 2 can set the function of leakage current at will, and the maximum enough leakage current limitation is ensured, so that the voltage-withstanding detection system is divided into two parts: the high-voltage generation main body of the high-voltage output current-limiting resistor and the alarm leakage current can be changed to be set and displayed at will, so that the voltage-withstanding instrument can carry out main insulation test on a sample through the high-voltage generation main body output test high voltage, and the function of searching for a specific fault point is achieved by combining resetting the alarm current limit value and changing the high-voltage output current-limiting resistor.
According to above-mentioned general withstand voltage appearance, the utility model discloses a following circuit structure and scheme:
referring to fig. 1, a power frequency voltage withstand instrument with fault point location, through a flow chart, K2 is attracted, only R1(K1 is 500) is in a high voltage output loop, a conventional voltage withstand instrument generally only performs a basic voltage withstand test to judge whether the insulation performance of a tested product meets requirements, when the tested product is judged to be unqualified, referring to fig. 3, in order to search for specific defects, K2 is disconnected, a current limiting resistor R2(R2 is 4.5K) is connected into the high voltage output loop, the total resistance value of the current limiting resistor of the voltage withstand instrument is 5K ohms, meanwhile, a leakage current alarm is set to be 1A which is the maximum allowable value of the instrument, so that the tested product is a complete breakdown short circuit, the current does not exceed 1A, K1 is not disconnected, therefore, high voltage output is ensured at both ends of the tested product all the time, a tester can find a specific fault point by observing a flicker phenomenon, in the high voltage output loop, K2 adopts a vacuum relay with a withstand, r2 adopts 5kW/4.5k ohm wire-wound resistance, ensures that the tested object breaks through the short circuit R2 completely and does not burn out due to heating.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (3)
1. The utility model provides a power frequency withstand voltage appearance of fault point location, includes current-limiting resistance unit (1) and leakage alarm unit (2), its characterized in that, current-limiting resistance unit (1) includes two resistance values and the equal different current-limiting resistance of power, and two current-limiting resistance accessible high voltage switching device are at the operating condition resistance of difference, leakage alarm unit (2) can set for the function of leakage current wantonly, and guarantee the restriction of the maximum leakage current that is enough big.
2. The power frequency withstand voltage instrument for fault point location according to claim 1, further comprising a withstand voltage detection system, wherein the withstand voltage detection system comprises a high voltage generation main body and an alarm circuit, the high voltage generation main body can change the high voltage output current limiting resistor, the withstand voltage instrument can perform a main insulation test on a high voltage test sample through the high voltage generation main body output test, and both the alarm current limit value and the high voltage generation main body of the alarm circuit can change the high voltage output current limiting resistor.
3. The main frequency voltage-withstanding instrument for locating a fault point as claimed in claim 1 or 2, wherein the main body for generating high voltage is a vacuum relay with a voltage-withstanding 20kV, and the current-limiting resistor is a wire-wound resistor with a voltage of 5kW/4.5k ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020450602.8U CN213240376U (en) | 2020-04-01 | 2020-04-01 | Power frequency voltage-withstanding instrument with fault point positioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020450602.8U CN213240376U (en) | 2020-04-01 | 2020-04-01 | Power frequency voltage-withstanding instrument with fault point positioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213240376U true CN213240376U (en) | 2021-05-18 |
Family
ID=75866863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020450602.8U Expired - Fee Related CN213240376U (en) | 2020-04-01 | 2020-04-01 | Power frequency voltage-withstanding instrument with fault point positioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213240376U (en) |
-
2020
- 2020-04-01 CN CN202020450602.8U patent/CN213240376U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213240376U (en) | Power frequency voltage-withstanding instrument with fault point positioning | |
| CN108594107B (en) | Comprehensive tester for circuit breaker loop resistance test and mechanical characteristic test | |
| CN205210232U (en) | Low pressure intelligence fault detector | |
| CN107728077A (en) | A kind of detection device of lithium battery electric core | |
| CN217278850U (en) | Pulse insulation two-in-one lithium battery cell short circuit detection device | |
| CN203337754U (en) | Resonance eliminator detection apparatus | |
| CN213149143U (en) | Surge detection device for aging test and aging test device | |
| CN115639466A (en) | DC air switch range tester | |
| CN205720637U (en) | A kind of check standard device for electric energy meter Withstand test device | |
| CN212207607U (en) | Quick wiring control device for temperature rise test of motor winding | |
| CN201886134U (en) | Storage battery load capability detector | |
| CN209087095U (en) | A kind of Electrical Safety detector | |
| CN208847828U (en) | A kind of power supply product tester | |
| CN111007295A (en) | Multimeter capable of automatically measuring | |
| CN113109679B (en) | Multifunctional insulation detector and insulation detection method of wire core to be detected | |
| CN211669267U (en) | Multimeter capable of automatically measuring | |
| CN110988666B (en) | Device for detecting voltage bearing and current bearing of relay contact | |
| CN218068231U (en) | Drop-out quick-break switch detection equipment | |
| CN220732348U (en) | Isolation switch | |
| CN214585702U (en) | Multifunctional full-automatic direct current resistance tester for transformer | |
| CN212932840U (en) | High-voltage-resistant tester | |
| CN216595300U (en) | Test circuit for insulation impedance fixture of DOB high-voltage module | |
| CN216485406U (en) | Detector for synchronous motor rotation excitation system | |
| CN221056644U (en) | Handheld adjustable load device | |
| CN217766813U (en) | Ferromagnetic resonance tester control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20210518 |