CN111426981A - Fault detection method for anti-creeping current power cabinet - Google Patents
Fault detection method for anti-creeping current power cabinet Download PDFInfo
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- CN111426981A CN111426981A CN202010345084.8A CN202010345084A CN111426981A CN 111426981 A CN111426981 A CN 111426981A CN 202010345084 A CN202010345084 A CN 202010345084A CN 111426981 A CN111426981 A CN 111426981A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a fault detection method of an anti-creeping current power cabinet, which comprises the following steps: firstly, the power supply of the power supply cabinet is turned off, then the cabinet door is opened by using related tools or keys, then whether related conductor parts fall or not is detected, and the related conductor parts are connected to a protection circuit after falling, so that the power supply cabinet with good appearance inspection is obtained; connecting a connecting wire in the electric leakage detection instrument with a ground wire on the power cabinet, then switching on the electric leakage detection instrument to a power supply, and starting a working mode to obtain the power cabinet ready for detection; according to the fault detection method for the anti-leakage current power cabinet, the power cabinet is detected through the leakage detection instrument, whether the power cabinet has the leakage condition or not can be accurately judged through repeated detection and comparison of different detected data values, the potential danger coefficient caused by personal safety during leakage is effectively avoided, and the fault detection method is simple to operate and convenient to use.
Description
Technical Field
The invention belongs to the technical field of detection, and particularly relates to a fault detection method of an anti-creeping current power supply cabinet.
Background
The power cabinet is that the cabinet body is modular structure, and the power cabinet has small, the quality is light, and technical index is superior, and the modularized design carries out intelligent management to battery charging and DC power supply cabinet behavior, the life of guarantee battery. The central monitor is arranged, so that the remote control function is realized, and the reliability and the automation level of a direct current system are improved;
the conventional power cabinet has certain defects, the conventional power cabinet is easy to leak electricity and cannot be noticed when in use, and the detection result is inaccurate by the conventional detection method, so that potential danger coefficients for personal safety exist in the reworking process of workers, and inconvenience is brought to use.
Disclosure of Invention
The invention mainly aims to provide a fault detection method of an anti-creeping current power cabinet, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a fault detection method for a leakage current prevention power cabinet comprises the following steps:
firstly, a power supply of a power supply cabinet is turned off, then a cabinet door is opened by using a related tool or a key, then whether related conductor parts fall or not is detected, and the related conductor parts are connected to a protection circuit after falling, so that the power supply cabinet with good appearance inspection is obtained;
secondly, connecting a connecting wire in the electric leakage detection instrument with a ground wire on the power cabinet, then switching on the electric leakage detection instrument to supply power, and starting a working mode to obtain the power cabinet ready for detection;
thirdly, the power cabinet ready for detection is connected to a leakage detection instrument, the leakage detection instrument is adjusted to be under normal voltage for detection, the detection time is 20-24 hours after starting, and then display data A on the leakage detection instrument is obtained;
step four, raising the voltage in the electric leakage detector to 1.05 times of the rated working voltage for secondary detection, wherein the detection time is 20-24h, and obtaining display data B on the electric leakage detector;
step five, raising the voltage in the electric leakage detector to 1.08 times of the rated working voltage for secondary detection, wherein the detection time is 20-24h, and obtaining display data C on the electric leakage detector;
and step six, comparing the obtained data A with the normal current value without electric leakage, if the detected data A is in the normal current range, carrying out repeated test, if the re-detected value is still in the normal current value, indicating that the power cabinet is qualified without electric leakage, and if the value exceeds the maximum range of the early warning value, indicating that the power cabinet is electric leakage.
And seventhly, comparing the obtained data B with the normal current value without electricity leakage, if the detected data B is in the normal early warning value range, carrying out repeated testing, if the re-detected value is still in the normal early warning value range, indicating that the power cabinet is qualified in terms of electricity leakage, and if the value exceeds the maximum early warning value range, indicating that the power cabinet is in terms of electricity leakage.
And step eight, comparing the obtained data c with the current early warning maximum value under normal no-leakage, if the detected data B is in the maximum range of the early warning value, carrying out repeated tests, if the re-detected numerical value is still in the maximum range of the normal early warning value, indicating that the power cabinet is qualified in no-leakage mode, if the numerical value exceeds the maximum range of the early warning value, indicating that the power cabinet is in leakage mode, and if the numerical value exceeds the maximum range of the early warning value, indicating that the power cabinet is in leakage mode.
And step nine, if two groups of data in the data A, the data B and the data C exceed the comparison value, the leakage of the power cabinet can be obtained, the power cabinet needs to be overhauled and maintained daily, if two groups of data are within the comparison value range, the power cabinet is not leaked and qualified, the fault detection method of the leakage current prevention power cabinet can be completed, and finally the accurate data whether the power cabinet leaks or not can be obtained.
Preferably, the rated action current without electric leakage selected in the step six is 10mA-12 mA.
Preferably, the current of the early warning value in the seventh step and the step is 25mA-30 mA.
Preferably, the time period for repeating the test in the sixth step, the seventh step and the eighth step is 10-12 h.
Preferably, if the power supply cabinet is detected to have electric leakage, a leakage protector is installed in the power supply cabinet.
Compared with the prior art, the invention has the following beneficial effects: this fault detection method of anticreep electric current power cabinet detects the power cabinet through the electric leakage detection instrument, compares through the different data value after repeated detection and the detection, and the condition whether electric leakage exists in the judgement power cabinet that can be accurate, the effectual danger coefficient that causes to personal safety when having avoided the electric leakage, if detect appear after the electric leakage according to the anticreep protector, the effectual technical problem who hinders people when having solved the electric leakage by mistake.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Examples
During detection, firstly, the power supply of the power supply cabinet is turned off, then the cabinet door is opened by using a related tool or a key, then whether related conductor parts fall off or not is detected, and the related conductor parts are connected to a protection circuit after falling off, so that the power supply cabinet with good appearance inspection is obtained; connecting a connecting wire in the electric leakage detection instrument with a ground wire on the power cabinet, then switching on the electric leakage detection instrument to a power supply, and starting a working mode to obtain the power cabinet ready for detection; secondly, the power cabinet ready for detection is connected to a leakage detection instrument, the leakage detection instrument is adjusted to be under normal voltage for detection, the detection time is 20-24 hours after starting, and then display data A on the leakage detection instrument is obtained; then, the voltage in the electric leakage detector is increased to 1.05 times of the rated working voltage for secondary detection, the detection time is 20-24h, and display data B on the electric leakage detector is obtained; then, the voltage in the electric leakage detector is increased to 1.08 times of the rated working voltage for secondary detection, the detection time is 20-24h, and display data C on the electric leakage detector are obtained; comparing the obtained data A with a normal current value without electricity leakage, wherein the rated current of the electricity leakage action is 10mA-12mA, if the detected data A is in a normal current range, repeated tests are required, the test time is 10h, if the re-detected numerical value is still in the normal current value, the electricity leakage of the power supply cabinet is qualified, and if the numerical value exceeds the maximum range of the early warning value, the electricity leakage of the power supply cabinet is represented; comparing the obtained data B with the normal current value without electricity leakage, if the detected data B is in the normal early warning value range, the current of the early warning value is 25mA-30mA, repeated testing is needed, the testing time is 10h, if the re-detected numerical value is still in the normal early warning value, the power cabinet without electricity leakage is qualified, and if the numerical value exceeds the maximum early warning value range, the power cabinet with electricity leakage is represented; comparing the obtained data c with the current early warning maximum value under normal no-leakage, if the detected data B is in the maximum range of the early warning value, the current of the early warning value is 25mA-30mA, repeated tests are required, the testing time is 10h, if the re-detected numerical value is still in the maximum range of the normal early warning value, the power cabinet is qualified in no-leakage, if the numerical value exceeds the maximum range of the early warning value, the power cabinet is in leakage, and if the numerical value exceeds the maximum range of the early warning value, the power cabinet is in leakage; and finally, if two groups of data in the data A, the data B and the data C exceed the comparison value, the leakage of the power cabinet can be obtained, the power cabinet needs to be overhauled and maintained daily, and if two groups of data are in the comparison value range, the power cabinet is qualified in leakage prevention, so that the fault detection method of the leakage-proof current power cabinet can be completed.
The foregoing shows and describes the general principles and broad features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A fault detection method for a leakage current prevention power supply cabinet is characterized by comprising the following steps:
firstly, a power supply of a power supply cabinet is turned off, then a cabinet door is opened by using a related tool or a key, then whether related conductor parts fall or not is detected, and the related conductor parts are connected to a protection circuit after falling, so that the power supply cabinet with good appearance inspection is obtained;
secondly, connecting a connecting wire in the electric leakage detection instrument with a ground wire on the power cabinet, then switching on the electric leakage detection instrument to supply power, and starting a working mode to obtain the power cabinet ready for detection;
thirdly, the power cabinet ready for detection is connected to a leakage detection instrument, the leakage detection instrument is adjusted to be under normal voltage for detection, the detection time is 20-24 hours after starting, and then display data A on the leakage detection instrument is obtained;
step four, raising the voltage in the electric leakage detector to 1.05 times of the rated working voltage for secondary detection, wherein the detection time is 20-24h, and obtaining display data B on the electric leakage detector;
step five, raising the voltage in the electric leakage detector to 1.08 times of the rated working voltage for secondary detection, wherein the detection time is 20-24h, and obtaining display data C on the electric leakage detector;
and step six, comparing the obtained data A with the normal current value without electric leakage, if the detected data A is in the normal current range, carrying out repeated test, if the re-detected value is still in the normal current value, indicating that the power cabinet is qualified without electric leakage, and if the value exceeds the maximum range of the early warning value, indicating that the power cabinet is electric leakage.
And seventhly, comparing the obtained data B with the normal current value without electricity leakage, if the detected data B is in the normal early warning value range, carrying out repeated testing, if the re-detected value is still in the normal early warning value range, indicating that the power cabinet is qualified in terms of electricity leakage, and if the value exceeds the maximum early warning value range, indicating that the power cabinet is in terms of electricity leakage.
And step eight, comparing the obtained data c with the current early warning maximum value under normal no-leakage, if the detected data B is in the maximum range of the early warning value, carrying out repeated tests, if the re-detected numerical value is still in the maximum range of the normal early warning value, indicating that the power cabinet is qualified in no-leakage mode, if the numerical value exceeds the maximum range of the early warning value, indicating that the power cabinet is in leakage mode, and if the numerical value exceeds the maximum range of the early warning value, indicating that the power cabinet is in leakage mode.
And step nine, if two groups of data in the data A, the data B and the data C exceed the comparison value, the leakage of the power cabinet can be obtained, the power cabinet needs to be overhauled and maintained daily, if two groups of data are within the comparison value range, the power cabinet is not leaked and qualified, the fault detection method of the leakage current prevention power cabinet can be completed, and finally the accurate data whether the power cabinet leaks or not can be obtained.
2. The method for detecting the fault of the anti-creeping current power cabinet according to claim 1, wherein: and the rated no-leakage action current selected in the step six is 10mA-12 mA.
3. The method for detecting the fault of the anti-creeping current power cabinet according to claim 1, wherein: and the current of the early warning value in the seventh step and the seventh step is 25mA-30 mA.
4. The method for detecting the fault of the anti-creeping current power cabinet according to claim 1, wherein: the duration of the repeated test in the sixth step, the seventh step and the eighth step is 10-12 h.
5. The method for detecting the fault of the anti-creeping current power cabinet according to claim 1, wherein: and if the situation of electric leakage of the power cabinet is detected, the electric leakage protector is arranged in the power cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010345084.8A CN111426981A (en) | 2020-04-27 | 2020-04-27 | Fault detection method for anti-creeping current power cabinet |
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| CN202010345084.8A CN111426981A (en) | 2020-04-27 | 2020-04-27 | Fault detection method for anti-creeping current power cabinet |
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| CN111426981A true CN111426981A (en) | 2020-07-17 |
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| CN209117791U (en) * | 2018-11-01 | 2019-07-16 | 苏州六赫机械有限公司 | A kind of ox horn type electrolytic capacitor earth leakage tester and system |
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| CN104007354A (en) * | 2013-02-27 | 2014-08-27 | 上海宝钢工业技术服务有限公司 | Whole-group test circuit and method for 10 kV zinc oxide lightning arrester and cable |
| CN104280062A (en) * | 2013-07-02 | 2015-01-14 | 海洋王（东莞）照明科技有限公司 | Testing method for piezoelectric type buzzer used for lamp |
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Application publication date: 20200717 |