CN101968459A - Detection method and detection device of internal faults of switch cabinet - Google Patents
Detection method and detection device of internal faults of switch cabinet Download PDFInfo
- Publication number
- CN101968459A CN101968459A CN2010102602676A CN201010260267A CN101968459A CN 101968459 A CN101968459 A CN 101968459A CN 2010102602676 A CN2010102602676 A CN 2010102602676A CN 201010260267 A CN201010260267 A CN 201010260267A CN 101968459 A CN101968459 A CN 101968459A
- Authority
- CN
- China
- Prior art keywords
- gas
- cabinet
- module
- switch
- switch cubicle
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 49
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 207
- 239000003570 air Substances 0.000 claims description 78
- 238000005070 sampling Methods 0.000 claims description 39
- 229910018503 SF6 Inorganic materials 0.000 claims description 30
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 30
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 28
- 238000009413 insulation Methods 0.000 claims description 25
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 22
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 21
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 21
- 239000000779 smoke Substances 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 8
- 230000002547 anomalous effect Effects 0.000 claims description 6
- 239000004047 hole gas Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000000284 extract Substances 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 5
- 239000007784 solid electrolyte Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 239000012080 ambient air Substances 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000009466 transformation Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 27
- 239000003990 capacitor Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 206010006326 Breath odour Diseases 0.000 description 1
- 208000032139 Halitosis Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000000214 mouth Anatomy 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention relates to a detection method and a detection device of internal faults of a switch cabinet, belonging to the field of power transformation and distribution. For the switch cabinet which is in hot-line operation when a cabinet door is in a closed state, the gas in the internal space of the cabinet body is extracted by utilizing a through hole of the cabinet body of the switch cabinet from the external part of the cabinet body; and by extraction, measurement and data comparison of the gas in the internal space of the cabinet body in the hot-line operation state, each numerical value of the unbalanced voltage representing a characteristic gas concentration item is compared with the numerical value of the unbalanced voltage representing the characteristic gas concentration item of ambient environment air and/or other switch cabinet freight spaces, thereby discovering the accident in the early stage or early accident potential in the switch cabinet as soon as possible to prevent the accident from expanding or further spreading. By adopting a gas acquisition mode, the invention can sensitively detect the common operation faults of the switch equipment in the cabinet. When the switch cabinet operates, the switch cabinet in the operation state does not need to be stopped, and the existing switch cabinet equipment does not need to be changed, thus the implementation cost is low, and the normal operation of the existing equipment can not be affected.
Description
Technical field
The invention belongs to change distribution field, relate in particular to a kind of fault finding method and sniffer that is used for power delivery/distributing equipment.
Background technology
Along with China's rapid economy development, also obtained for a long time development fast as the power industry on basis.As one of visual plant in the power construction, the application of enclosed type combined electrical apparatus is universal day by day, also safety/the stable operation of enclosed type combined electric appliance equipment is had higher requirement simultaneously.
The air insulation switch cubicle is a kind of of enclosed type combined electrical apparatus, is widely used in the switchgear of 10～40.5KV.
Yet, because due to the characteristics of its closed enclosure body structure, the air insulation switch cubicle also has certain shortcoming, mainly be early stage what take place unusually at internal electric, find relatively difficulty.If can not in time find and handle, can cause the damage of switchgear and appurtenances thereof/destroy by fire usually, when serious in addition can have influence on the operation of total system and whole transformer and distribution power station/ the person/device security.
Concrete, the air insulation switch cubicle generally adopts the box body shape structure, it all is placed on cabinet inside with all elements of controller switching equipment, the problem that such version is brought is exactly can't be outside in time from cabinet/understand the equipment operation condition (the cabinet door of cabinet is to be in closed condition during normal charging operation) of cabinet inside intuitively, for the modal conductor joint heating of primary equipment, sulfur hexafluoride gas leaks, faults such as shelf depreciation is unusual, can't be by directly perceived outside cabinet, significantly mode is in time found or is showed, when discovered, often led to serious consequence.
For example,, have only when pressure is lower than warning or locking value by the time, could show indirectly by alarm window, pilot lamp for the leakage failure of sulfur hexafluoride insulating gas; And for partial discharges fault, though adopt the high-frequency ultrasonic detection means to detect, the accuracy of its detection and sensitivity can not be satisfactory; And for example,, adopt the contactless Infrared survey of directing pointing also not good at present other online detection means for the conductor joint heating fault except opening the cabinet door; Though there is unit to work out at position reload temperature detectors such as switch cubicle isolating switch dolly contacts, sniffer and measurement means with the wireless outside emission of temperature signal, but this device shortcoming also clearly, equipment must have a power failure by the storehouse during installation, installment work cost height, and because transformer and distribution power station/institute is the strong interference region of electromagnetic wave, the reliability and the life-span of device itself also have problems.
So, how under the state of enclosed type switchboard assembly charging operation (this moment, the cabinet door of switch cubicle was in the closed position), to obtain the operation conditions of switchgear in the cabinet in time, at low cost or to find its misoperation information, become the scene and move/patrol and examine problem demanding prompt solution in the work.
Summary of the invention
Technical matters to be solved by this invention provides a kind of detection method and sniffer of switch cubicle internal fault, it is in when moving under the charging operation state at switch cubicle, adopt and the contactless gas collecting mode of first and second loop electrified body, can detect the common operation troubles of switchgear in the cabinet delicately, and do not need during work operating switch cubicle is stopped labour, do not need the existing electric first and second loop equipment of switch cubicle is changed yet, implementation cost is cheap, does not influence the normal operation of existing equipment.
Technical scheme of the present invention is: a kind of detection method of switch cubicle internal fault is provided, comprises the cabinet of switch cubicle, it is characterized in that:
Be in the switch cubicle of the charging operation under the closed condition for the cabinet door,, utilize the through hole of switch cabinet body, extract the gas of cabinet inner space in the cabinet outside;
For gas in the cabinet that is drawn out of, adopt gas concentration measuring apparatus to carry out the measurement of concetration of certain specific characteristic gas;
Multichannel gas sensor module is set in the described gas concentration measuring apparatus, the corresponding concentration of measuring a certain specific characteristic gas of each road gas sensor module, each road gas sensor module is provided with a balanced bridge;
Described gas sensor module is transformed into electric signal with the concentration of various specific characteristic gases;
Adopt the method measure the unbalance voltage of each balanced bridge respectively or successively, the variation of numerical value or numerical value by the unbalance voltage value comes the concentration of certain characteristic gas in the corresponding reflection cabinet or the variation tendency of concentration;
Write down respectively gas concentration measuring apparatus to the pairing unbalance voltage value of various specific characteristic gas concentrations in the cabinet and should be in the period the pairing unbalance voltage value of the concentration of specific characteristic gas of the same race in the surrounding air;
With same cabinet sometime in unbalance voltage value and the surrounding air of the section various specific characteristic gases of surveying the pairing unbalance voltage value of specific characteristic gas of the same race and/or other different cabinets at one time section interior specific characteristic gas of the same race the measured value of corresponding unbalance voltage compare;
Find the switch cubicle of unbalance voltage value ANOMALOUS VARIATIONS;
According to unbalance voltage value generation ANOMALOUS VARIATIONS the kind of corresponding specific characteristic gas, correspondence draws pairing accident kind and pairing switch cubicle position in storehouse;
By extraction, measurement/analysis and data contrast to charging operation state lower cabinet body inner space gas, represent the unbalance voltage numerical value of certain characteristic gas concentration project to compare each with the numerical value of the unbalance voltage of this kind of representative characteristic gas concentration project of ambient air and/or other switch cubicle positions in storehouse, find that early switch cubicle inside is in accident or the early failure hidden danger of just sending out the stage, prevent the expansion of accident or further spread.
Concrete, above-mentioned specific characteristic gas comprises ozone, sulfur hexafluoride and smog at least, discharge, sulfur hexafluoride gas that its pairing accident is respectively switch cubicle inside leak and the conductor joint heating accident.
Be provided with gas sampling module, gas sensor module, display module and power module in the above-mentioned gas concentration measuring apparatus; Described gas concentration measuring apparatus utilizes the gas sampling module to extract the gas of switch cabinet inner space, it is sent into the gas sampling part of gas sensor module, the unbalance voltage output signal of gas sensor module is sent into display module and is shown in real time, and described power module provides working power for gas sampling module, gas sensor module and display module.
Further, the through hole of described switch cabinet body comprises lockhole, handle hole or the louvre of switch cubicle.
Described gas sensor module comprises semiconductor gas sensor and/or solid electrolyte galvanochemistry gas sensor.
The present invention also provides a kind of switch cubicle internal fault sniffer that adopts said method to carry out work, it is characterized in that: be provided with one portable and have a device case of air intake opening; Gas sampling module, gas sensor module, display module and power module are set in housing; The air intake opening of described device case is connected with through hole gas circuit on the air insulation switch cabinet; Described gas sensor module is carried out gas circuit with the inner space of air insulation switch cabinet and is connected through the through hole on gas sampling module, device case air intake opening and the air insulation switch cabinet; The detection signal output terminal of described gas sensor module is electrically connected with the measuring-signal input end of display module; The power output end of described power module is electrically connected with the power input of gas sampling module, gas sensor module and display module.
Further, the air intake opening of described device case is on flexible sucker is fixed on through hole on the air insulation switch cabinet.
Concrete, described gas sampling module comprises vacuum pump and control knob switch, the gas suction inlet of described vacuum pump is connected with through hole gas circuit on the air insulation switch cabinet through the air intake opening of device case, and the gas vent of described vacuum pump is connected with the gas sampling part gas circuit of gas sensor module; Described control knob switch series is connected between the power output end and vacuum pump winding coil of power module.
Described gas sensor module comprises ozone sensor, sulfur hexafluoride sensor, air mass sensor, hydrogen sulfide sensor and/or smoke transducer and peripheral circuit thereof.
Described display module comprises voltage table and input selection change-over switch, and the measuring voltage input end of described voltage table selects change-over switch to be electrically connected with the measuring-signal output terminal of gas sensor module through input.
Described power module comprises accumulator/dry cell batteries and power switch at least.
Compared with the prior art, advantage of the present invention is:
1. use the mode that air is analyzed in the switch cubicle that extracts, can detect the common operation troubles of switchgear in the cabinet delicately, and do not need during work operating switch cubicle is stopped labour, do not need the existing electric first and second loop equipment of switch cubicle is changed yet, implementation cost is cheap, does not influence the normal operation of existing equipment;
2. be in when moving under the charging operation state at switch cubicle, adopt non-electric-connecting mode, operation conditions to switch cubicle detects, the conductor joint heating of detecting air insulated switch cabinet inside, discharge and sulfur hexafluoride gas leakage etc. are unusual delicately, help the early detection of fault and processing in time, can avoid the expansion of problem and spreading of fault effectively, for condition has been created in the safety/stable operation of whole transformation and distribution system;
3. device adopts portable construction, is convenient to use under mobile status, can satisfy the regular visit requirement fully, and is easy to operate, detection accuracy is high.
Description of drawings
Fig. 1 is a method step schematic block diagram of the present invention;
Fig. 2 is the inner structure synoptic diagram of apparatus of the present invention;
Fig. 3 is the circuit diagram of the embodiment of the invention.
1 is device case among the figure, and 2 is air intake opening, and 3 are the gas sampling module, and 4 is the gas sensor module, and 5 is display module, and 6 is power module, and 7 is flexible sucker,
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Among Fig. 1, detection method of the present invention comprises the following steps: at least
A, be in the switch cubicle of the charging operation under the closed condition,, utilize the through hole of switch cabinet body, extract the gas of cabinet inner space in the cabinet outside for the cabinet door;
B, for gas in the cabinet that is drawn out of, adopt gas concentration measuring apparatus to carry out the measurement of concetration of certain specific characteristic gas;
Multichannel gas sensor module is set in C, the described gas concentration measuring apparatus, the corresponding concentration of measuring a certain specific characteristic gas of each road gas sensor module, each road gas sensor module is provided with a balanced bridge;
D, described gas sensor module are transformed into electric signal with the concentration of various specific characteristic gases;
E, adopt the method measure the unbalance voltage of each balanced bridge respectively or successively, the variation of numerical value or numerical value by the unbalance voltage value comes the concentration of certain characteristic gas in the corresponding reflection cabinet or the variation tendency of concentration;
F, respectively write down gas concentration measuring apparatus to the pairing unbalance voltage value of various specific characteristic gas concentrations in the cabinet and should be in the period the pairing unbalance voltage value of the concentration of specific characteristic gas of the same race in the surrounding air;
G, with same cabinet sometime in unbalance voltage value and the surrounding air of the section various specific characteristic gases of surveying the pairing unbalance voltage value of specific characteristic gas of the same race and/or other different cabinets at one time section interior specific characteristic gas of the same race the measured value of corresponding unbalance voltage compare;
The switch cubicle of H, discovery unbalance voltage value ANOMALOUS VARIATIONS;
I, according to unbalance voltage value generation ANOMALOUS VARIATIONS the kind of corresponding specific characteristic gas, correspondence draws pairing accident kind and pairing switch cubicle position in storehouse;
J, extraction, measurement/analysis and the data passed through charging operation state lower cabinet body inner space gas contrast, represent the unbalance voltage numerical value of certain characteristic gas concentration project to compare each with the numerical value of the unbalance voltage of this kind of representative characteristic gas concentration project of ambient air and/or other switch cubicle positions in storehouse, find that early switch cubicle inside is in accident or the early failure hidden danger of just sending out the stage, prevent the expansion of accident or further spread.
Gas sensor is a kind of sensor that detects specific gas.It mainly comprises semiconductor gas sensor, catalytic combustion type gas sensor and galvanochemistry gas sensor etc., and wherein the maximum of usefulness are semiconductor gas sensors.Its application mainly contains: the detection of ethanol, detection of human oral cavity halitosis or the like in the detection of the detection of the detection of CO gas, the detection of methane gas, coal gas, freon (R11, R12), the expiration.
It becomes electric signal with gaseous species and with concentration dependent information translation, just can obtain to have the relevant information of situation with gas to be measured in environment according to the power of these electric signal, thereby can detect, monitor, report to the police; Can also form automatic detection, control and warning system by interface circuit and computing machine.
Further, in technical scheme of the present invention, described specific characteristic gas comprises ozone, sulfur hexafluoride and smog at least, and discharge, sulfur hexafluoride gas that its pairing accident is respectively switch cubicle inside leak and the conductor joint heating accident.
Be provided with gas sampling module, at least one road gas sensor module, display module and power module in the described gas concentration measuring apparatus; Described gas concentration measuring apparatus utilizes the gas sampling module to extract the gas of switch cabinet inner space, it is sent into the gas sampling part of gas sensor module, the unbalance voltage output signal of gas sensor module is sent into display module and is shown in real time, and described power module provides working power for gas sampling module, gas sensor module and display module.
The through hole of described switch cabinet body comprises lockhole, handle hole or the louvre of switch cubicle.
Described gas sensor module comprises semiconductor gas sensor and/or solid electrolyte galvanochemistry gas sensor.
In the technical program, adopt the mode that air carries out qualitative/quantitative test in the switch cubicle that extracts, conductor joint heating, discharge and the sulfur hexafluoride gas that can detect switchgear in the cabinet delicately leak three kinds of common operation troubless, and do not need during work operating switch cubicle is stopped labour, do not need the existing electric first and second loop equipment of switch cubicle is changed yet, implementation cost is cheap, does not influence the normal operation of existing equipment, is specially adapted to those power transmission and transformation of having built up institutes/stand.
Simultaneously, be in when moving under the charging operation state at switch cubicle, adopt non-electric-connecting mode, operation conditions to switch cubicle detects, the abnormal occurrence of detecting air insulated switch cabinet inside or accident sign in advance delicately, help the early detection of fault and processing in time, can avoid the expansion of problem and spreading of fault effectively, for condition has been created in the safety/stable operation of whole transformation and distribution system.
Among Fig. 2, sniffer of the present invention comprises that one has the device case 1 of air intake opening 2 and venthole (not shown); In housing, be provided with gas sampling module 3, gas sensor module 4, display module 5 and power module 6.
The air intake opening of device case is connected with through hole (not shown) gas circuit on the air insulation switch cabinet; The venthole of device case communicates with atmosphere.
The gas sensor module is carried out gas circuit with the inner space of air insulation switch cabinet and is connected through the through hole on gas sampling module, device case air intake opening and the air insulation switch cabinet.
Further, at device case air intake opening and the end that through hole gas circuit on the air insulation switch cabinet is connected, a flexible sucker 7 can be set, the air intake opening of device case is on flexible sucker is fixed on through hole on the air insulation switch cabinet.
Perhaps, on device case air intake opening and the air insulation switch cabinet between the through hole, one sampling pipe is set, the device case air intake opening is connected with through hole gas circuit on the air insulation switch cabinet through sampling pipe, an end that is connected with through hole on the air insulation switch cabinet at sampling pipe, one flexible sucker is set, and sampling pipe is on flexible sucker is fixed on through hole on the air insulation switch cabinet.
The detection signal output terminal of gas sensor module is electrically connected with the measuring-signal input end of display module.
The power output end of power module is electrically connected with the power input of gas sampling module, gas sensor module and display module.
Gas sampling module in this sniffer comprises vacuum pump and control knob switch, the gas suction inlet of described vacuum pump is connected with the sampling pipe gas circuit through the air intake opening of device case, and the gas vent of described vacuum pump is connected with the gas sampling part gas circuit of gas sensor module; Described control knob switch series is connected between the power output end and vacuum pump winding coil of power module.
Gas sensor module in this sniffer is a gas sensor.
Concrete, gas sensor comprises ozone sensor, sulfur hexafluoride sensor, air mass sensor, hydrogen sulfide sensor and/or smoke transducer.
Display module in this sniffer comprises voltage table and input selection change-over switch, and the measuring voltage input end of voltage table selects change-over switch to be electrically connected with the measuring-signal output terminal of gas sensor module through input.
Power module in this sniffer comprises accumulator/dry cell batteries, and is concrete, and power module comprises accumulator/dry cell batteries, reverse-connection preventing circuit, power switch, integrated regulator and charging socket.
Through hole on the aforementioned air insulation switch cabinet comprises lockhole, handle hole or the louvre of switch cubicle.
Among Fig. 3, the electric road part of device of the present invention is made of gas sampling module, gas sensor module, display module and power module successively.
Constitute upward from circuit, gas sampling module 3 comprises vaccum pump motor M and control knob switch S A3; Wherein, control knob switch and the winding coil serial connection back of vaccum pump motor and positive and negative power output end corresponding connection of difference of power module.
The ozone sensor testing circuit comprises ozone sensor CG1, first resistance R 1, the second current regulator diode D2 and the 7th adjustable resistance R7, the 1st pin of ozone sensor is connected through the positive pole of first resistance with the power module power output end, the 2nd pin of ozone sensor is connected with the positive pole of second current regulator diode with the power module power output end through the 7th adjustable resistance, the 3rd pin of ozone sensor is connected with the negative pole of power module power output end, the link of its 7th adjustable resistance and second current regulator diode, the detection signal output terminal of formation ozone sensor testing circuit.
The sulfur hexafluoride sensor detection circuit comprises sulfur hexafluoride sensor CG2, second resistance R 2, the 3rd current regulator diode D3 and the 8th adjustable resistance R8, the 1st pin of sulfur hexafluoride sensor is connected through the positive pole of second resistance with the power module power output end, the 2nd pin of sulfur hexafluoride sensor is connected with the positive pole of the 3rd current regulator diode with the power module power output end through the 8th adjustable resistance, the 3rd pin of sulfur hexafluoride sensor is connected with the negative pole of power module power output end, the link of its 8th adjustable resistance and the 3rd current regulator diode, the detection signal output terminal of formation sulfur hexafluoride sensor detection circuit.
The air mass sensor testing circuit comprises air mass sensor CG3, the 5th resistance R 5 and the tenth resistance R 10, two fire end pins of air mass sensor respectively with the corresponding connection of positive and negative electrode of power module power output end, the 3rd pin of air mass sensor is connected through the positive pole of the 5th resistance with the power module power output end, the 4th pin of air mass sensor is connected with the negative pole of power module power output end, after its air mass sensor the 3rd pin is connected in series the tenth resistance, constitute the detection signal output terminal of air mass sensor testing circuit.
The hydrogen sulfide sensor testing circuit comprises hydrogen sulfide sensor CG4, the 3rd resistance R 3, the 11 resistance R 11 and the 4th current regulator diode D4, the 1st pin of hydrogen sulfide sensor is connected through the positive pole of the 3rd resistance with the power module power output end, the 2nd pin of hydrogen sulfide sensor is connected through the positive pole of the 4th current regulator diode with the power module power output end, the 3rd pin of hydrogen sulfide sensor is connected with the negative pole of power module power output end, after its hydrogen sulfide sensor the 3rd pin is connected in series the 11 resistance, constitute the detection signal output terminal of hydrogen sulfide sensor testing circuit.
The smoke transducer testing circuit comprises smoke transducer CG5, the 4th resistance R 4, the 6th resistance R 6 and the 12 resistance R 12, the 1st pin of smoke transducer is connected through the positive pole of the 4th resistance with the power module power output end, the 2nd pin of smoke transducer is connected through the positive pole of the 6th resistance with the power module power output end, the 3rd pin of smoke transducer is connected with the negative pole of power module power output end, after the 2nd pin of its smoke transducer is connected in series the 12 resistance, constitute the detection signal output terminal of smoke transducer testing circuit.
The detection signal output terminal of ozone sensor testing circuit selects the 1st measuring-signal input end of change-over switch SA2 to be connected with input in the display module.
The detection signal output terminal of sulfur hexafluoride sensor detection circuit selects the 2nd measuring-signal input end of change-over switch SA2 to be connected with input in the display module.
The detection signal output terminal of air mass sensor testing circuit, hydrogen sulfide sensor testing circuit and smoke transducer testing circuit also connects, and selects the 3rd measuring-signal input end of change-over switch SA2 to be connected with input in the display module.
Display module 5 comprises input selection change-over switch SA2, voltage table V, the 13 resistance R 13, the 14 resistance R 14 and the 9th adjustable resistance R9, input selects the 1st measuring-signal input end of change-over switch to be connected with the detection signal output terminal of ozone sensor testing circuit, input selects the 2nd measuring-signal input end of change-over switch to be connected with the detection signal output terminal of sulfur hexafluoride sensor detection circuit, the 3rd measuring-signal input end and the air mass sensor testing circuit of change-over switch selected in input, the detection signal output terminal of hydrogen sulfide sensor testing circuit and smoke transducer testing circuit is connected, be connected through the negative pole of the 9th adjustable resistance simultaneously with the power module power output end, 2 working power input ends of voltage table respectively with the power module power output end just, negative pole is corresponding to be connected, the first input signal end of voltage table selects the detection signal output terminal of change-over switch to be connected with input, the second input signal end of voltage table is connected through the positive pole of the 13 resistance with the power module power output end, and the second input signal end of voltage table also is connected through the negative pole of the 14 resistance with the power module power output end simultaneously.
On the other hand, on circuit function, gas sampling module 3 comprises vaccum pump motor M and control knob switch S A3, and the power input of vaccum pump motor M links to each other with the power output end of power module with pushbutton switch SA3 series connection back.
The output terminal of ozone sensor CG1 be connected in parallel on the power circuit power output end after ozone sensor output terminal current regulator diode D2 and zero potentiometer R7 connect, the accessory power supply end of ozone sensor CG1 and the power output end that is connected in parallel on power circuit after accessory power supply resistance R 1 is connected.
The output terminal of sulfur hexafluoride sensor CG2 be connected in parallel on the power circuit power output end after current regulator diode D3 and zero potentiometer R8 connect, the accessory power supply end of sulfur hexafluoride sensor CG2 and the power output end that is connected in parallel on power circuit after accessory power supply resistance R 2 is connected.
The output terminal of air mass sensor CG3 be connected in parallel on the power circuit power output end after output terminal resistance R 5 is connected, the accessory power supply end of air mass sensor CG3 is connected in parallel on the power output end of power circuit.
The output terminal of hydrogen sulfide sensor CG4 and smoke transducer CG5 is connected in parallel on the power circuit power output end respectively with after current regulator diode D4 and output terminal resistance R 6 connect, the accessory power supply end of hydrogen sulfide sensor CG4 and smoke transducer CG5 respectively with the power output end that is connected in parallel on power circuit after resistance R 3 and resistance R 4 are connected; First selected element 1 and second selected element 2 that are connected in series and a little meet change-over switch SA2 respectively of zero potentiometer R7 and R8 and current regulator diode D2 and D3; The output terminal of air mass sensor, hydrogen sulfide sensor and smoke transducer meets equalizing resistance R10, equalizing resistance R11 and equalizing resistance R12 respectively, the other end of equalizing resistance R10, equalizing resistance R11 and equalizing resistance R12 all links to each other with the 3rd selected element 3 of change-over switch SA2, and connects power cathode by zero potentiometer R9.
Hydrogen sulfide sensor in this circuit, sulfur hexafluoride sensor and ozone sensor suggestion select for use solid electrolyte galvanochemistry gas sensor to be advisable.
In display module 5, be connected in parallel on the power circuit power output end after divider resistance R13 and the divider resistance R14 series connection, being connected in series of divider resistance R13 and divider resistance R14 a little connects the signal input part of voltage table V, another signal input part of voltage table V links to each other with the common point of change-over switch SA2, the working power input end of voltage table V is connected in parallel on the power output end of power circuit, and voltage table V selects the digital display type voltage table for use.
In power module 6, the positive pole of charging socket K links to each other with battery B by isolating diode D1, the positive pole of battery B links to each other with the input end of integrated regulator IC by power switch SA1, be parallel with filter capacitor C1 between the output terminal of integrated regulator IC and the adjustment end, the adjustment end of integrated regulator IC is connected with the negative pole of battery B and charging socket K.In the said elements, diode D1 be used for by the charging socket when self-contained battery is charged charger polarity anti-inserted; Integrated regulator IC adopts 7805 types, is used for cell voltage is stabilized in 5V, gives sensor power supplies at different levels; C1 is a filter capacitor, is used for stable dc power supply voltage.
In addition, clearly, gas sensor module in this circuit is used for all gases concentration signal is transformed into electric signal, in this modular circuit, resistance R 1, R2, R3, R4 are the accessory power supply resistance of sensor, are used to the electrolyte of sensor internal or accessory power supply that galvanic current stream is provided; Diode D2, D3, D4 are the output terminal current regulator diodes of sensor, because ozone, sulfur hexafluoride and hydrogen sulfide sensor are for deciding electric current output in this circuit, therefore its output end current need be fixed by current regulator diode, provides convenience for taking out signal voltage simultaneously; Resistance R 5, R6 are respectively the output terminal pull-up resistors of peculiar smell sensor and smoke transducer, provide convenience for taking out signal voltage; Resistance R 10, R11, R12 is used for and will surveys the peculiar smell of heating, sulfuretted hydrogen, the output terminal of smoke transducer connects to simplify circuit, this is because various gas sensor output resistances all are inverse ratio with characteristic gas concentration, resistance R 10, R11, R12 three's resistance is identical, its resistance is much larger than the maximum output resistance of three sensors, a in this master drawing, b, the current potential that c is 3 can show by a bit (the 3rd selected element 3 of the selector switch SA2 among the figure), 3 current potential among the figure approximates a, b, the mean value of c three point voltages, resistance diminishes as long as there is a sensor to experience unusual, and then 3 current potential will descend; Resistance R 13, R14 and diode D2, D3, D4 and resistance R 5, R6 constitute balanced bridge, so just can detect the variation of each sensor output resistance in high sensitivity; V is a digital voltmeter, is used for intuitively showing the unbalance voltage of balanced bridge; Resistance R 7, R8, R9 are used for zeroing to obtain reference gas concentration, are convenient to detect.
Owing to also have characteristic gas such as some particles, sulfuretted hydrogen, ozone in the air, and various places are different, therefore before the detector switch cabinet equipment, can obtain outside air by the gas sampling module earlier, surrounding air is set at reference value, regulate adjustable resistance (potentiometer) R7, R8, R9 respectively to bridge balance, voltage table V non-metering, detector switch cabinet equipment again, just can compare facilities each characteristic gas of inner air and outside air in the difference of characteristic gas on concentration or content, thereby checkout equipment more easily.
Test item change-over switch SA2, be used for switching " heating ", " SF6 leakage ", " discharge " three kinds of test items, wherein first selected element 1 of change-over switch is for detecting " discharge " fault, second selected element 2 is for detecting " SF6 (sulfur hexafluoride) leakage " fault, and the 3rd selected element 3 is for detecting " conductor joint heating " fault.
The exhaust end of the gas sampling assembly 2 in this device partly links to each other with the gas sampling of gas sensor module 3.SA3 wherein presses the running of SA3 vacuum pump for getting the gas pushbutton switch, sucks gas from the external world, is blown into the gas sensor module from exhaust end, judges for sensor.
During actual the use, energized switch S A1, device is started working, need this moment to wait for about 1 minute, treat that all the sensors preheating finishes, after entering stable state, can begin to measure, the output resistance variation of each sensor is reflected on the voltage table by balanced bridge, in order to make the data that record directly perceived, can return to zero respectively selecting change-over switch to cut earlier to each position, then the air hatch of sniffer is aimed at the lockhole of door of switch cabinet, handle hole or louvre, it is air-breathing to press SA3 connection vacuum pump, and device just can show the unbalance voltage of the balanced bridge of corresponding various characteristic gas concentration, the unbalance voltage size of each project is compared with the numerical value of surrounding air and other switch cubicle positions in storehouse, and just can clearly show inside has unusual switch cubicle equipment position in storehouse.
Because the present invention adopts non-electric-connecting gas analysis mode to gather the running state parameter of measurand, can detect the modal three kinds of operation troubless of switchgear in the cabinet delicately, when carrying out testing, do not need operating switch cubicle is stopped labour, do not influence the normal operation of existing equipment, help the early detection of fault and processing in time, can avoid the expansion of problem and spreading of fault effectively, for condition has been created in the safety/stable operation of whole transformation and distribution system.
Simultaneously, this device adopts the portable construction design, be convenient under mobile status, use, under the state of enclosed type switchboard assembly charging operation, can obtain the operation conditions of switchgear in the cabinet of a plurality of air insulation switch cubicle positions in storehouse " one-to-many " in time, at low cost or find its misoperation information, the detection implementation cost is cheap, and the detection accuracy height has solved that not having a power failure of existing equipment undergoes technological transformation and the problems such as perfect of device monitoring means.
The present invention can be widely used in the operation monitoring field of various enclosed type combined electrical apparatuses/air insulation switch cubicle.
Claims (10)
1. the detection method of a switch cubicle internal fault comprises it is characterized in that the cabinet of switch cubicle:
Be in the switch cubicle of the charging operation under the closed condition for the cabinet door,, utilize the through hole of switch cabinet body, extract the gas of cabinet inner space in the cabinet outside;
For gas in the cabinet that is drawn out of, adopt gas concentration measuring apparatus to carry out the measurement of concetration of certain specific characteristic gas;
Multichannel gas sensor module is set in the described gas concentration measuring apparatus, the corresponding concentration of measuring a certain specific characteristic gas of each road gas sensor module, each road gas sensor module is provided with a balanced bridge;
Described gas sensor module is transformed into electric signal with the concentration of various specific characteristic gases;
Adopt the method measure the unbalance voltage of each balanced bridge respectively or successively, the variation of numerical value or numerical value by the unbalance voltage value comes the concentration of certain characteristic gas in the corresponding reflection cabinet or the variation tendency of concentration;
Write down respectively gas concentration measuring apparatus to the pairing unbalance voltage value of various specific characteristic gas concentrations in the cabinet and should be in the period the pairing unbalance voltage value of the concentration of specific characteristic gas of the same race in the surrounding air;
With same cabinet sometime in unbalance voltage value and the surrounding air of the section various specific characteristic gases of surveying the pairing unbalance voltage value of specific characteristic gas of the same race and/or other different cabinets at one time section interior specific characteristic gas of the same race the measured value of corresponding unbalance voltage compare;
Find the switch cubicle of unbalance voltage value ANOMALOUS VARIATIONS;
According to unbalance voltage value generation ANOMALOUS VARIATIONS the kind of corresponding specific characteristic gas, correspondence draws pairing accident kind and pairing switch cubicle position in storehouse;
By extraction, measurement/analysis and data contrast to charging operation state lower cabinet body inner space gas, represent the unbalance voltage numerical value of certain characteristic gas concentration project to compare each with the numerical value of the unbalance voltage of this kind of representative characteristic gas concentration project of ambient air and/or other switch cubicle positions in storehouse, find that early switch cubicle inside is in accident or the early failure hidden danger of just sending out the stage, prevent the expansion of accident or further spread.
2. according to the detection method of the described switch cubicle internal fault of claim 1, it is characterized in that described specific characteristic gas comprises ozone, sulfur hexafluoride and smog at least, discharge, sulfur hexafluoride gas that its pairing accident is respectively switch cubicle inside leak and the conductor joint heating accident.
3. according to the detection method of the described switch cubicle internal fault of claim 1, it is characterized in that being provided with in the described gas concentration measuring apparatus gas sampling module, gas sensor module, display module and power module; Described gas concentration measuring apparatus utilizes the gas sampling module to extract the gas of switch cabinet inner space, it is sent into the gas sampling part of gas sensor module, described gas sensor module is used for all gases concentration signal is transformed into electric signal, the unbalance voltage output signal of gas sensor module is sent into display module and is shown in real time, and described power module provides working power for gas sampling module, gas sensor module and display module.
4. according to the detection method of claim 1 or 3 described switch cubicle internal faults, it is characterized in that the through hole of described switch cabinet body, comprise lockhole, handle hole or the louvre of switch cubicle; Described gas sensor module comprises semiconductor gas sensor and/or solid electrolyte galvanochemistry gas sensor.
5. switch cubicle internal fault sniffer is characterized in that:
Be provided with one portable and have a device case of air intake opening;
Gas sampling module, gas sensor module, display module and power module are set in housing;
The air intake opening of described device case is connected with through hole gas circuit on the air insulation switch cabinet;
Described gas sensor module is carried out gas circuit with the inner space of air insulation switch cabinet and is connected through the through hole on gas sampling module, device case air intake opening and the air insulation switch cabinet;
The detection signal output terminal of described gas sensor module is electrically connected with the measuring-signal input end of display module;
The power output end of described power module is electrically connected with the power input of gas sampling module, gas sensor module and display module.
6. according to the described switch cubicle internal fault of claim 5 sniffer, the air intake opening that it is characterized in that described device case is on flexible sucker is fixed on through hole on the air insulation switch cabinet.
7. according to the described switch cubicle internal fault of claim 5 sniffer, it is characterized in that described gas sampling module comprises vacuum pump and control knob switch, the gas suction inlet of described vacuum pump is connected with through hole gas circuit on the air insulation switch cabinet through the air intake opening of device case, and the gas vent of described vacuum pump is connected with the gas sampling part gas circuit of gas sensor module; Described control knob switch series is connected between the power output end and vacuum pump winding coil of power module.
8. according to the described switch cubicle internal fault of claim 5 sniffer, it is characterized in that described gas sensor module comprises ozone sensor, sulfur hexafluoride sensor, air mass sensor, hydrogen sulfide sensor and/or smoke transducer and peripheral circuit thereof.
9. according to the described switch cubicle internal fault of claim 5 sniffer, it is characterized in that described display module comprises voltage table and input selection change-over switch, the measuring voltage input end of described voltage table selects change-over switch to be electrically connected with the measuring-signal output terminal of gas sensor module through input.
10. according to the described switch cubicle internal fault of claim 5 sniffer, it is characterized in that described power module comprises at least one accumulator/dry cell batteries and power switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010260267 CN101968459B (en) | 2010-08-23 | 2010-08-23 | Detection method of internal faults of switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010260267 CN101968459B (en) | 2010-08-23 | 2010-08-23 | Detection method of internal faults of switch cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101968459A true CN101968459A (en) | 2011-02-09 |
| CN101968459B CN101968459B (en) | 2013-06-19 |
Family
ID=43547644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010260267 Active CN101968459B (en) | 2010-08-23 | 2010-08-23 | Detection method of internal faults of switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101968459B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105557A (en) * | 2013-01-29 | 2013-05-15 | 温州电力局 | Method and device of high-tension switch cabinet multi-fault diagnosis |
| CN105548837A (en) * | 2015-12-15 | 2016-05-04 | 国家电网公司 | Defect warning device of insulating member in switch cabinet |
| CN105589017A (en) * | 2015-12-15 | 2016-05-18 | 国家电网公司 | Characteristic gas detection-based method for predicting defect of insulating part inside switch cabinet |
| EP2791668B1 (en) | 2011-12-13 | 2016-11-16 | ABB Schweiz AG | Method for operating an electrical apparatus |
| CN106602533A (en) * | 2016-12-14 | 2017-04-26 | 安徽长龙电气集团有限公司 | Overvoltage protection circuit used for power distribution cabinet |
| CN106771751A (en) * | 2016-12-27 | 2017-05-31 | 浙江电力变压器有限公司温州昌泰电力开关分公司 | A kind of portable distribution automation prepackage debugging test case |
| CN107110530A (en) * | 2014-12-24 | 2017-08-29 | 皇家飞利浦有限公司 | Monitoring air quality and the system and method that the event of air quality may be influenceed and remedial action is taken |
| CN107861452A (en) * | 2017-12-15 | 2018-03-30 | 国网安徽省电力公司蚌埠供电公司 | A kind of high-voltage switch gear room indoor environment early warning and monitoring device and its early-warning monitoring method |
| CN109612652A (en) * | 2018-12-12 | 2019-04-12 | 云南电网有限责任公司电力科学研究院 | A kind of N2Insulated switch cabinet gas leak detection method |
| CN110187244A (en) * | 2019-04-30 | 2019-08-30 | 国网山西省电力公司电力科学研究院 | A kind of fault detection means and method for switchgear |
| CN110853211A (en) * | 2019-11-25 | 2020-02-28 | 重庆望变电气（集团）股份有限公司 | Intelligent access control system and method for power distribution room |
| CN110940642A (en) * | 2019-12-13 | 2020-03-31 | 西安锐驰电器有限公司 | Gas detection system and detection method for high-low voltage switch cabinet |
| CN113670540A (en) * | 2021-08-25 | 2021-11-19 | 上海普法芬电子科技有限公司 | Detection method for detecting electrolyte leakage during battery offline |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014152A (en) * | 1983-07-05 | 1985-01-24 | Fuji Electric Corp Res & Dev Ltd | Apparatus for detecting decomposition product in electrical apparatus insulated by gas |
| CN88100511A (en) * | 1987-02-02 | 1988-08-31 | 三菱电机株式会社 | The internal abnormality pick-up unit that is used for electric apparatus inflated sulfur hexafluoride |
| JPH05188024A (en) * | 1992-01-13 | 1993-07-27 | Chubu Electric Power Co Inc | Internal abnormality diagnostic device for gas-insulated electric equipment |
| JP2825634B2 (en) * | 1990-10-03 | 1998-11-18 | 三菱電機株式会社 | Internal abnormality detection device for gas insulated electrical equipment |
| JPH1137993A (en) * | 1997-07-23 | 1999-02-12 | Mitsubishi Electric Corp | Method for diagnosing constructional material inside gas sealing power apparatus |
| CN101047272A (en) * | 2006-03-31 | 2007-10-03 | 索尼德国有限责任公司 | Battery leakage detection system |
| CN201803970U (en) * | 2010-08-23 | 2011-04-20 | 上海市电力公司超高压输变电公司 | Internal fault detector for switch cabinet |
-
2010
- 2010-08-23 CN CN 201010260267 patent/CN101968459B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014152A (en) * | 1983-07-05 | 1985-01-24 | Fuji Electric Corp Res & Dev Ltd | Apparatus for detecting decomposition product in electrical apparatus insulated by gas |
| CN88100511A (en) * | 1987-02-02 | 1988-08-31 | 三菱电机株式会社 | The internal abnormality pick-up unit that is used for electric apparatus inflated sulfur hexafluoride |
| JP2825634B2 (en) * | 1990-10-03 | 1998-11-18 | 三菱電機株式会社 | Internal abnormality detection device for gas insulated electrical equipment |
| JPH05188024A (en) * | 1992-01-13 | 1993-07-27 | Chubu Electric Power Co Inc | Internal abnormality diagnostic device for gas-insulated electric equipment |
| JPH1137993A (en) * | 1997-07-23 | 1999-02-12 | Mitsubishi Electric Corp | Method for diagnosing constructional material inside gas sealing power apparatus |
| CN101047272A (en) * | 2006-03-31 | 2007-10-03 | 索尼德国有限责任公司 | Battery leakage detection system |
| CN201803970U (en) * | 2010-08-23 | 2011-04-20 | 上海市电力公司超高压输变电公司 | Internal fault detector for switch cabinet |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2791668B1 (en) | 2011-12-13 | 2016-11-16 | ABB Schweiz AG | Method for operating an electrical apparatus |
| CN103105557A (en) * | 2013-01-29 | 2013-05-15 | 温州电力局 | Method and device of high-tension switch cabinet multi-fault diagnosis |
| CN107110530A (en) * | 2014-12-24 | 2017-08-29 | 皇家飞利浦有限公司 | Monitoring air quality and the system and method that the event of air quality may be influenceed and remedial action is taken |
| CN107110530B (en) * | 2014-12-24 | 2020-01-17 | 皇家飞利浦有限公司 | System and method for monitoring air quality and events that may affect air quality and taking remedial action |
| CN105589017B (en) * | 2015-12-15 | 2017-09-12 | 国家电网公司 | A kind of switch cubicle interior insulation part failure prediction method of feature based gas detection |
| CN105548837B (en) * | 2015-12-15 | 2017-08-29 | 国家电网公司 | A kind of switch cubicle interior insulation part defect prior-warning device |
| CN105589017A (en) * | 2015-12-15 | 2016-05-18 | 国家电网公司 | Characteristic gas detection-based method for predicting defect of insulating part inside switch cabinet |
| CN105548837A (en) * | 2015-12-15 | 2016-05-04 | 国家电网公司 | Defect warning device of insulating member in switch cabinet |
| CN106602533A (en) * | 2016-12-14 | 2017-04-26 | 安徽长龙电气集团有限公司 | Overvoltage protection circuit used for power distribution cabinet |
| CN106771751A (en) * | 2016-12-27 | 2017-05-31 | 浙江电力变压器有限公司温州昌泰电力开关分公司 | A kind of portable distribution automation prepackage debugging test case |
| CN106771751B (en) * | 2016-12-27 | 2023-09-15 | 浙江电力变压器有限公司温州昌泰电力开关分公司 | Automatic preassemble debugging test box of mobile distribution network |
| CN107861452A (en) * | 2017-12-15 | 2018-03-30 | 国网安徽省电力公司蚌埠供电公司 | A kind of high-voltage switch gear room indoor environment early warning and monitoring device and its early-warning monitoring method |
| CN109612652A (en) * | 2018-12-12 | 2019-04-12 | 云南电网有限责任公司电力科学研究院 | A kind of N2Insulated switch cabinet gas leak detection method |
| CN110187244A (en) * | 2019-04-30 | 2019-08-30 | 国网山西省电力公司电力科学研究院 | A kind of fault detection means and method for switchgear |
| CN110853211A (en) * | 2019-11-25 | 2020-02-28 | 重庆望变电气（集团）股份有限公司 | Intelligent access control system and method for power distribution room |
| CN110940642A (en) * | 2019-12-13 | 2020-03-31 | 西安锐驰电器有限公司 | Gas detection system and detection method for high-low voltage switch cabinet |
| CN113670540A (en) * | 2021-08-25 | 2021-11-19 | 上海普法芬电子科技有限公司 | Detection method for detecting electrolyte leakage during battery offline |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101968459B (en) | 2013-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101968459B (en) | Detection method of internal faults of switch cabinet | |
| CN201803970U (en) | Internal fault detector for switch cabinet | |
| CN105606666B (en) | A kind of portable switch cabinet partial discharge detection device and method based on gas sensor | |
| CN101452034B (en) | Portable intelligent DC earthing searching instrument | |
| CN102955081B (en) | A kind of status of electric power detects mobile laboratory | |
| CN202393840U (en) | Mobile laboratory for detecting power equipment state | |
| CN203929904U (en) | The charged solution loop device of a kind of straight-flow system | |
| CN104459490A (en) | Ultrasonic wave analysis device and system for GIS breakdown positioning in electric system | |
| CN111313327B (en) | Handheld intelligent electrical circuit parameter inspection device, system and method | |
| CN103105557A (en) | Method and device of high-tension switch cabinet multi-fault diagnosis | |
| CN115047037A (en) | Portable detection device and detection method based on microfluidic gas sensor | |
| CN109974939B (en) | Method and system for comprehensively detecting SF6 leakage | |
| CN105807176A (en) | Laboratory simulation test device and method of electrical equipment online detection device | |
| CN105606974A (en) | Portable GIS partial discharge detection device | |
| CN208537353U (en) | Open-air monitoring device | |
| CN101685110B (en) | Variable frequency memory alternating current acousto-optic electroscope | |
| CN106353624A (en) | Power distribution automation power-outage-free debugging equipment and working method thereof | |
| CN108973764A (en) | A kind of charging unit and the detection method for early warning that charges | |
| CN103529416A (en) | Method and Device for laboratory simulation test of electric equipment on-line detection device | |
| CN104062101A (en) | Oil storage tank breathing valve tester | |
| CN203587790U (en) | Device for laboratory simulation test of electric equipment on-line detection device | |
| CN207198226U (en) | A kind of low pressure residue leakage current measurement instrument | |
| CN101813743A (en) | Method for detecting partial discharge in gas insulated switchgear and detecting and positioning device | |
| CN217332332U (en) | Shared calibration system for environmental gas detection | |
| CN108534839A (en) | Electric power safety detecting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ELECTRIC POWER CORP. Free format text: FORMER OWNER: SHANGHAI ULTRA-HV TRANSMISSION + DISTRIBUTION COMPANY, SHANGHAI ELECTRIC POWER C Effective date: 20110519 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200063 NO. 600, WUNING ROAD, PUTUO DISTRICT, SHANGHAI TO: 200122 NO. 1122, YUANSHEN ROAD, SHANGHAI |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110519 Address after: 200122, 1122 deep road, Shanghai Applicant after: Shanghai Electric Power Corporation Address before: 200063 No. 600, Wuning Road, Shanghai, Putuo District Applicant before: Shanghai Ultra-HV Transmission & Distribution Company, Shanghai Electric Power C |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Effective date: 20121105 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20121105 Address after: 200122, 1122 deep road, Shanghai Applicant after: Shanghai Electric Power Corporation Applicant after: State Grid Corporation of China Address before: 200122, 1122 deep road, Shanghai Applicant before: Shanghai Electric Power Corporation |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |