CN105510765A - Earth fault diagnostic device - Google Patents
Earth fault diagnostic device Download PDFInfo
- Publication number
- CN105510765A CN105510765A CN201410494850.1A CN201410494850A CN105510765A CN 105510765 A CN105510765 A CN 105510765A CN 201410494850 A CN201410494850 A CN 201410494850A CN 105510765 A CN105510765 A CN 105510765A
- Authority
- CN
- China
- Prior art keywords
- earth fault
- indicator
- main circuit
- charging capacitor
- ground connection
- 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.)
- Granted
Links
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides an earth fault diagnostic device. The earth fault diagnostic device comprises a detector, an indicator and a charging capacitor, wherein one end of the detector is grounded; the other end of the detector is connected with one end of the indicator; the other end of the indicator is connected with a cathode of a main circuit; the detector is used for detecting a grounding electric signal in the main circuit; the indicator and the charging capacitor are arranged in parallel connection; the indicator is used for indicating whether an earth fault exists in the main circuit; and the charging capacitor is used for absorbing the grounding electric signal when the grounding electric signal exists in the main circuit. The earth fault diagnostic device solves the problem that in the prior art, when the performance of a current sensor is reduced or damaged and no earth fault exists, the current sensor reports an earth fault so that a control system breaks disconnects the main circuit of a locomotive and normal operation of the alternating-current electric locomotive is influenced, and can restart a vehicle to guarantee normal operation of the locomotive when an earth fault is reported falsely.
Description
Technical field
The present invention relates to electric field, particularly relate to a kind of earth fault diagnostic equipment.
Background technology
Flourish along with China railways cause, AC electric locomotive safe running performance becomes one of important indicator of examination AC electric locomotive quality.Main circuit can be caused cannot normally work when or multipoint earth faults occur AC electric locomotive main circuit at 2, even cause AC electric locomotive main circuit and power device to burn, therefore sensitive reliable main circuit grounding testing circuit is the requisite pith of locomotive.
In prior art; ground connection electric signal is gathered by ground current sensor; and ground connection electric signal is delivered to control system in real time; if main circuit of electric locomotive there occurs earth fault; ground current sensor detects ground connection electric signal; and ground connection electric signal is delivered to control system, disconnect the power supply of powering to trailer system by control system and electric locomotive is stopped, complete earthing detection and protection act.
But when hydraulic performance decline or the damage of current sensor, do not depositing under a ground fault condition, current sensor but quotes earth fault, causes control system to disconnect main circuit of electric locomotive, affects the normal operation of AC electric locomotive.
Summary of the invention
The invention provides a kind of earth fault diagnostic equipment, with solve in prior art when the hydraulic performance decline of current sensor or damage time, do not depositing under a ground fault condition, current sensor but quotes earth fault, cause control system to disconnect the power supply of powering to trailer system, affect the problem of the normal operation of AC electric locomotive.
For solving the problems of the technologies described above, of the present inventionly providing a kind of earth fault diagnostic equipment, comprising voltage regulation capacitor, the two ends of described voltage regulation capacitor are connected with the positive pole of main circuit and negative pole respectively, also comprise: detecting device, indicator and charging capacitor;
One end ground connection of described detecting device, the other end of described detecting device is connected with one end of described indicator, and the other end of described indicator is connected with the negative pole of main circuit, and described detecting device is for detecting the ground connection electric signal in described main circuit;
Described indicator and described charging capacitor are arranged in parallel, and described indicator is used for prompting and whether there is earth fault;
Described charging capacitor is used for absorbing described ground connection electric signal when there is ground connection electric signal in described main circuit.
In an embodiment of above-mentioned earth fault diagnostic equipment, described detecting device is current sensor, and described indicator is pilot lamp;
One end ground connection of described current sensor, the other end of described current sensor is connected with one end of described pilot lamp, and the other end of described pilot lamp is connected with the negative pole of described main circuit.
In an embodiment of above-mentioned earth fault diagnostic equipment, described earth fault diagnostic equipment also comprises:
First resistance, described first resistance is arranged in parallel with described charging capacitor after connecting with described indicator, and described first resistance is for reducing the voltage at described indicator two ends.
In an embodiment of above-mentioned earth fault diagnostic equipment, described earth fault diagnostic equipment also comprises:
Second resistance, described second resistance and described charging capacitor are arranged in parallel, the electric energy that described second resistance stores for discharging described charging capacitor.
Earth fault diagnostic equipment provided by the invention, by one end ground connection of detecting device, the other end of detecting device is connected with one end of indicator, and the other end of indicator is connected with the negative pole of main circuit, and detecting device is for detecting the ground connection electric signal in main circuit; Indicator and charging capacitor are arranged in parallel, and indicator is for pointing out in main circuit whether there is earth fault; Charging capacitor absorbs ground connection electric signal when being used for there is ground connection electric signal in main circuit, solve in prior art when the hydraulic performance decline of current sensor or damage time, do not depositing under a ground fault condition, current sensor but quotes earth fault, control system is caused to disconnect main circuit of electric locomotive, affect the problem of the normal operation of AC electric locomotive, when vacation report earth fault, vehicle can be restarted to ensure the normal operation of locomotive.
Accompanying drawing explanation
The structural representation of a kind of earth fault diagnostic equipment that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the another kind of earth fault diagnostic equipment that Fig. 2 provides for the embodiment of the present invention;
The schematic diagram under earth fault dotted state is there is in Fig. 3 for main circuit of electric locomotive that the embodiment of the present invention provides.
Embodiment
For the embodiment of the present invention will be solved technical matters, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The embodiment of the present invention provides a kind of earth fault diagnostic equipment, and this earth fault diagnostic equipment is applicable to the earth fault diagnosing main circuit of electric locomotive.
As shown in Figure 1, the structural representation of a kind of earth fault diagnostic equipment that Fig. 1 provides for the embodiment of the present invention, the earth fault diagnostic equipment that the present embodiment provides comprises voltage regulation capacitor, the two ends of voltage regulation capacitor are connected with the positive pole of main circuit and negative pole respectively, and the earth fault diagnostic equipment that the present embodiment provides also comprises: detecting device, indicator and charging capacitor.
Wherein, one end ground connection of detecting device, the other end of detecting device is connected with one end of indicator, and the other end of indicator is connected with the negative pole of main circuit, and detecting device is for detecting the ground connection electric signal in main circuit; Indicator and charging capacitor are arranged in parallel, and indicator is for pointing out in main circuit whether there is earth fault; Charging capacitor absorbs ground connection electric signal when being used for there is ground connection electric signal in main circuit.
If AC electric locomotive main circuit there occurs earth fault, earthing detection loop just has certain ground connection electric signal and flows through, detecting device can detect this ground connection electric signal, ground connection electric signal charges to charging capacitor, when the voltage at charging capacitor two ends is greater than the rated voltage at indicator two ends, indicator can send earth fault indicator signal, really there occurs so that staff can send earth fault indicator signal determination earth fault according to indicator; If when detector performance declines or damages, do not deposit under a ground fault condition actually, detecting device but reports out earth fault by mistake, control system is caused to disconnect main circuit of electric locomotive, now by whether have issued earth fault indicator signal according to indicator, staff can determine whether that earth fault occurs, in such cases, because detecting device detection electric signal is wrong, indicator can not send earth fault indicator signal, staff can judge it is now earth fault does not occur, therefore, staff can restart locomotive continuation operation.It should be noted that, voltage regulation capacitor is used for stabilizing machine car owner circuit voltage.
The earth fault diagnostic equipment that this enforcement provides, by one end ground connection of detecting device, the other end of detecting device is connected with one end of indicator, and the other end of indicator is connected with the negative pole of main circuit, and detecting device is for detecting the ground connection electric signal in main circuit; Indicator and charging capacitor are arranged in parallel, and indicator is for pointing out in main circuit whether there is earth fault; Charging capacitor absorbs ground connection electric signal when being used for there is ground connection electric signal in main circuit, solve in prior art when the hydraulic performance decline of current sensor or damage time, do not depositing under a ground fault condition, current sensor but quotes earth fault, control system is caused to disconnect main circuit of electric locomotive, affect the problem of the normal operation of AC electric locomotive, when vacation report earth fault, vehicle can be restarted to ensure the normal operation of locomotive.
Further, detecting device is current sensor, and indicator is pilot lamp;
One end ground connection of current sensor, the other end of current sensor is connected with one end of pilot lamp, and the other end of pilot lamp is connected with the negative pole of main circuit.It should be noted that, if when performance of current sensors declines or damages, do not deposit under a ground fault condition actually, current sensor but reports out earth fault by mistake, when causing control system to disconnect the power supply of powering to trailer system, now staff can by the state according to pilot lamp, determine whether that earth fault occurs, in such cases, because current sensor detection electric signal is wrong, pilot lamp does not work, and staff can judge it is now earth fault does not occur, therefore, staff can restart locomotive continuation operation.
Further, earth fault diagnostic equipment also comprises:
First resistance, as shown in Figure 2, the structural representation of the another kind of earth fault diagnostic equipment that Fig. 2 provides for the embodiment of the present invention, first resistance is connected with indicator afterwards and charging capacitor is arranged in parallel, first resistance, for reducing the voltage at indicator two ends, after the first resistance of setting shares the voltage on the first resistance and indicator circuit, can reduce the voltage at indicator two ends, thus the selection specification of indicator can be reduced, also namely can select the indicator that electric pressure is low.
Further, as shown in Figure 2, earth fault diagnostic equipment also comprises:
Second resistance, the second resistance and charging capacitor are arranged in parallel, the electric energy that the second resistance stores for discharging charging capacitor.
The schematic diagram under earth fault dotted state is there is in Fig. 3 for main circuit of electric locomotive as shown in Figure 2 that the embodiment of the present invention provides.If AC electric locomotive main circuit there occurs earth fault, earthing detection loop just has certain ground connection electric signal and flows through, detecting device can detect this ground connection electric signal, ground connection electric signal charges to charging capacitor, when the voltage at charging capacitor two ends is greater than the rated voltage at indicator two ends, indicator can send earth fault indicator signal, really there occurs so that staff can send earth fault indicator signal determination earth fault according to indicator; If when detector performance declines or damages, do not deposit under a ground fault condition actually, detecting device but reports out earth fault by mistake, control system is caused to disconnect main circuit of electric locomotive, now by whether have issued earth fault indicator signal according to indicator, staff can determine whether that earth fault occurs, in such cases, because detecting device detection electric signal is wrong, indicator can not send earth fault indicator signal, staff can judge it is now earth fault does not occur, therefore, staff can restart locomotive continuation operation.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (4)
1. an earth fault diagnostic equipment, comprises voltage regulation capacitor, and the two ends of described voltage regulation capacitor are connected with the positive pole of main circuit and negative pole respectively, it is characterized in that, also comprise: detecting device, indicator and charging capacitor;
One end ground connection of described detecting device, the other end of described detecting device is connected with one end of described indicator, and the other end of described indicator is connected with the negative pole of described main circuit, and described detecting device is for detecting the ground connection electric signal in described main circuit;
Described indicator and described charging capacitor are arranged in parallel, and described indicator is for pointing out in described main circuit whether there is earth fault;
Described charging capacitor is used for absorbing described ground connection electric signal when there is ground connection electric signal in described main circuit.
2. earth fault diagnostic equipment according to claim 1, is characterized in that, described detecting device is current sensor, and described indicator is pilot lamp;
One end ground connection of described current sensor, the other end of described current sensor is connected with one end of described pilot lamp, and the other end of described pilot lamp is connected with the negative pole of described main circuit.
3. earth fault diagnostic equipment according to claim 1 and 2, is characterized in that, described earth fault diagnostic equipment also comprises:
First resistance, described first resistance is arranged in parallel with described charging capacitor after connecting with described indicator, and described first resistance is for reducing the voltage at described indicator two ends.
4. earth fault diagnostic equipment according to claim 3, is characterized in that, described earth fault diagnostic equipment also comprises:
Second resistance, described second resistance and described charging capacitor are arranged in parallel, the electric energy that described second resistance stores for discharging described charging capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410494850.1A CN105510765B (en) | 2014-09-24 | 2014-09-24 | Ground fault diagnosis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410494850.1A CN105510765B (en) | 2014-09-24 | 2014-09-24 | Ground fault diagnosis device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105510765A true CN105510765A (en) | 2016-04-20 |
| CN105510765B CN105510765B (en) | 2020-01-07 |
Family
ID=55718885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410494850.1A Active CN105510765B (en) | 2014-09-24 | 2014-09-24 | Ground fault diagnosis device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105510765B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155357A (en) * | 1994-05-10 | 1997-07-23 | 内沃电力及电子工业(1994)有限公司 | Detector for monitoring integrity of ground connection of electrical appliance |
| CN101609124A (en) * | 2009-07-03 | 2009-12-23 | 株洲南车时代电气股份有限公司 | A kind of ground detecting method of power supply system of train |
| US20100207635A1 (en) * | 2009-02-16 | 2010-08-19 | Maxim Integrated Products, Inc. | Fault detection method for detecting leakage paths between power sources and chassis |
| CN102035195A (en) * | 2010-08-31 | 2011-04-27 | 中国北车股份有限公司大连电力牵引研发中心 | Automatic ground protective device for light rail garage power and control method thereof |
| CN202770902U (en) * | 2012-06-21 | 2013-03-06 | 山东电力集团公司日照供电公司 | Grounding electricity testing indicating device |
| CN204302426U (en) * | 2014-09-24 | 2015-04-29 | 北车大连电力牵引研发中心有限公司 | Earth fault diagnostic equipment |
-
2014
- 2014-09-24 CN CN201410494850.1A patent/CN105510765B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155357A (en) * | 1994-05-10 | 1997-07-23 | 内沃电力及电子工业(1994)有限公司 | Detector for monitoring integrity of ground connection of electrical appliance |
| US20100207635A1 (en) * | 2009-02-16 | 2010-08-19 | Maxim Integrated Products, Inc. | Fault detection method for detecting leakage paths between power sources and chassis |
| CN101609124A (en) * | 2009-07-03 | 2009-12-23 | 株洲南车时代电气股份有限公司 | A kind of ground detecting method of power supply system of train |
| CN102035195A (en) * | 2010-08-31 | 2011-04-27 | 中国北车股份有限公司大连电力牵引研发中心 | Automatic ground protective device for light rail garage power and control method thereof |
| CN202770902U (en) * | 2012-06-21 | 2013-03-06 | 山东电力集团公司日照供电公司 | Grounding electricity testing indicating device |
| CN204302426U (en) * | 2014-09-24 | 2015-04-29 | 北车大连电力牵引研发中心有限公司 | Earth fault diagnostic equipment |
Non-Patent Citations (1)
| Title |
|---|
| 李顺 等: "O"Z-Y型机车接地故障诊断检测的设计", 《电力机车与城轨车辆》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105510765B (en) | 2020-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20120314327A1 (en) | Dc power supply insulation fault detection circuit | |
| CN107031410B (en) | Electric automobile pre-charging circuit and fault diagnosis method thereof | |
| CN202602326U (en) | Charger with over-voltage protection | |
| CN103576046A (en) | Storage battery system having storage battery protector and diagnostic device, and diagnostic method thereof | |
| CN103884988A (en) | Battery pack fault detection device and detection method | |
| CN102067421A (en) | A power apparatus for a high voltage electrical power system | |
| CN205097957U (en) | Interlocking of electric automobile high pressure realizes device | |
| CN103323674A (en) | Circuit and method for real-time detection of ground insulation impedance of photovoltaic grid-connected inverter | |
| CN203965564U (en) | Ground fault detection circuit | |
| CN108089119B (en) | Secondary circuit electrification detection method and system for relay protection secondary equipment of transformer substation | |
| CN104426128A (en) | Circuit and method for detecting breakage of neutral line and corresponding residual current circuit breaker | |
| CN104749484A (en) | Electric-leakage monitoring device | |
| CN103414155A (en) | Neutral point installation electronic type rapid harmonic-vibration eliminating device | |
| CN106671782B (en) | A kind of AC electric locomotive trailer system | |
| CN102998620B (en) | Device and method for quick online fault detection of high voltage thyristor valve block | |
| CN103723045A (en) | Monitoring and alarming device for electric vehicle high-voltage power distribution systems | |
| CN202230168U (en) | Current-type circuit-detection automatic reclosing device | |
| CN106314189A (en) | Charge-discharge circuit and automobile | |
| CN204302426U (en) | Earth fault diagnostic equipment | |
| CN103809069B (en) | Surge arrester failure indicating means and device | |
| CN102288868A (en) | One-point grounding detector and detection method for voltage transformer secondary coil neutral line | |
| CN102608371A (en) | Storage battery detecting device and undervoltage protection method thereof | |
| CN104977858A (en) | Control method of vehicle-mounted electronic device turn-on and turn-off | |
| CN210835189U (en) | Arc fault and electric leakage fault detection protection system and charging pile | |
| CN204895155U (en) | Circuit, electric automobile control system and electric automobile on electric automobile high pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Sun Rongkun Inventor after: Ji Tiesheng Inventor after: Li Jinchi Inventor before: Ji Tiesheng Inventor before: Geng Hui |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |