CN109342938B - SF6 density relay calibration device based on secondary signal - Google Patents
SF6 density relay calibration device based on secondary signal Download PDFInfo
- Publication number
- CN109342938B CN109342938B CN201811444602.0A CN201811444602A CN109342938B CN 109342938 B CN109342938 B CN 109342938B CN 201811444602 A CN201811444602 A CN 201811444602A CN 109342938 B CN109342938 B CN 109342938B
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- gas
- air
- density relay
- gas circuit
- air passage
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- 238000012360 testing method Methods 0.000 claims abstract description 43
- 238000012795 verification Methods 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
Abstract
The invention discloses an SF6 density relay calibration device based on a secondary signal, which comprises: SF6 gas cylinder, air pump, first gas circuit, a plurality of second gas circuit, a plurality of third gas circuit, multichannel gas circuit connect in row, electronic pressure gauge, touch display, SF6 test instrument, controller; the SF6 gas cylinder is communicated with the gas pump through a gas pipe, the gas pump is communicated with the gas inlet of the multi-channel gas circuit socket through a first gas circuit, and one end of the second gas circuit and one end of the third gas circuit are respectively communicated with a plurality of gas outlets of the multi-channel gas circuit socket; the electronic pressure gauge is communicated with the first air passage through an air pipe, the touch display is connected with the electronic pressure gauge, and the other end of the second air passage is connected with the air passage connecting end of the SF6 density relay to be checked; the other end of the third air path is communicated with an SF6 test instrument; the method not only can carry out conventional SF6 density relay verification, but also can carry out the technical effect of SF6 test.
Description
Technical Field
The invention relates to the field of SF6 density relay verification, in particular to an SF6 density relay verification device based on secondary signals.
Background
The intelligent transformer station is built, equipment of GIS (HGIS) is adopted by more and more variable power stations, and SF6 density relays are adopted in a large quantity as main insulation important monitoring devices of the equipment. The development of verification work is an important basis for guaranteeing the accuracy of the alarm function of the SF6 density relay.
The conventional SF6 density relay calibration device can only calibrate the SF6 density relay, cannot perform other tests, has a single function, and cannot simultaneously perform a plurality of tests.
Disclosure of Invention
The invention provides an SF6 density relay verification device based on a secondary signal, which not only can carry out conventional SF6 density relay verification, but also can carry out the technical effect of SF6 test.
To achieve the above object, the present application provides an SF6 density relay calibration device based on a secondary signal, the device comprising:
SF6 gas cylinder, air pump, first gas circuit, a plurality of second gas circuit, a plurality of third gas circuit, multichannel gas circuit connect in row, electronic pressure gauge, touch display, SF6 test instrument, controller;
the SF6 gas cylinder is communicated with the gas pump through a gas pipe, the gas pump is communicated with the gas inlet of the multi-channel gas circuit socket through a first gas circuit, and one end of the second gas circuit and one end of the third gas circuit are respectively communicated with a plurality of gas outlets of the multi-channel gas circuit socket; the electronic pressure gauge is communicated with the first air passage through an air pipe, the touch display is connected with the electronic pressure gauge, and the other end of the second air passage is connected with the air passage connecting end of the SF6 density relay to be checked; the other end of the third air path is communicated with an SF6 test instrument; the first air passage is provided with a first electromagnetic valve, the second air passage is provided with a second electromagnetic valve, the third air passage is provided with a third electromagnetic valve, and the air pump, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are all connected with the controller.
The principle of the invention is as follows: when the SF6 density relay is required to be checked, the air pump, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are opened through the controller, SF6 gas is transmitted to the multi-channel gas circuit socket through the first gas circuit, then the SF6 gas is transmitted to the SF6 density relay to be detected through the second gas circuit, and the SF6 density relay is checked; when SF6 gas test is needed, opening an air pump, a first electromagnetic valve and a third electromagnetic valve through a controller, closing a second electromagnetic valve, transmitting SF6 gas to a multi-channel gas circuit socket through a first gas circuit, and transmitting the SF6 gas to an SF6 test instrument through a third gas circuit to test the SF6 gas; not only can the conventional SF6 density relay check be performed, but also SF6 tests can be performed.
Further, the circuit connection end of the SF6 density relay is connected with the terminal strip of the secondary control cubicle, and the controller is connected with the terminal strip of the secondary control cubicle. Under the original technical background, need dismantle SF6 density relay secondary signal line, not only have certain security risk, and partial early SF6 density can not dismantle, leads to on-the-spot unable check-up, and this scheme is got the signal based on secondary cable line, not only can avoid tearing open the security risk that connects secondary signal line to bring, and can very big reduction work load, can accomplish the density relay check-up that partial can't dismantle simultaneously. Meanwhile, other SF6 testers can share the test air path by utilizing results, one-time joint is completed, and a plurality of test projects are completed.
Further, the device also comprises a power supply and a voltage reduction chip, wherein the power supply is connected with the SF6 density relay and the controller through the voltage reduction chip, the input 24V is converted into 5V and 3.3V through the voltage reduction chip, the 5V is used for supplying power to the relay, and the 3.3V is used for supplying power to the control chip. The buck chip is a common chip in the prior art.
Further, the multichannel gas circuit socket includes:
the cuboid shell, the shell lower surface middle part is equipped with the gas inlet, and the shell upper surface evenly is equipped with a plurality of gas outlets, is the cavity form in the shell, and gas inlet and gas outlet all communicate with the cavity.
Further, each air outlet is provided with a fourth electromagnetic valve, and the fourth electromagnetic valve is connected with the controller. The controller can control the opening and closing of the fourth electromagnetic valve, so that the air flow in the device can be accurately controlled.
Further, the traditional mode is that need pull down SF6 density relay and bring back the laboratory and carry out the check-up, and this application utilizes the transport vechicle to carry the device transportation all scene and test, need not to pull down SF6 density relay, the device still includes the transport vechicle, be fixed with transport case and air entrainment pump on the transport vechicle, transport case internal fixation has SF6 gas storage tank, be equipped with SF6 gas cylinder storage tank in the transport case, be equipped with a plurality of different recesses of size on the SF6 gas cylinder storage tank, all deposited the SF6 gas cylinder that the capacity is different in every recess, SF6 gas cylinder on the SF6 gas cylinder storage tank communicates with the air entrainment pump through the gas pipe, and air entrainment pump and SF6 gas storage tank intercommunication. The storage tank for storing a large amount of SF6 gas is stored in the transport vehicle, a plurality of SF6 gas cylinders can be inflated through the SF6 gas storage tank, the gas content of each SF6 gas cylinder is different, a tester can flexibly determine the type and the quantity of the gas cylinder to be worn according to the requirements of the site, the fact that the SF6 gas cylinder is carried too much once is avoided, or the SF6 gas cylinder is carried too little to be inspected is avoided, the traditional SF6 gas cylinder is similar to the existing liquefied tank, the quality is large, the SF6 gas cylinder is inconvenient to carry to the site for testing, and the SF6 gas is not used much for each test, so that the transport vehicle is arranged, a large amount of SF6 gas storage tanks can be placed on the vehicle, and each time the SF6 gas cylinder with corresponding capacity is only required to be worn for the site test, and the transport is convenient.
Furthermore, three columns are further arranged in the transport case and used for winding and storing the first air passage, the second air passage and the third air passage respectively, and a second storage cabinet is further arranged in the transport case and used for storing the multi-passage air passage socket, the electronic pressure gauge, the touch display, the SF6 test instrument and the controller. The cylinder is convenient for the air path to wind on, and is convenient for storage.
Further, the transport case is internally provided with air tightness detection equipment. The air tightness detection equipment is utilized to detect the air tightness of the device, so that the accuracy of device inspection can be controlled conveniently.
Furthermore, cleaning equipment is also arranged in the transport case. The impurity in the device or the air pipe or the air circuit can be cleaned by the cleaning equipment, so that the normal operation of the inspection test is ensured.
Further, the SF6 test instrument comprises an SF6 moisture tester, an SF6 purity tester and an SF6 decomposition product tester. SF6 tests can be performed using these testers.
One or more technical schemes provided by the application have at least the following technical effects or advantages:
the method not only can carry out conventional SF6 density relay verification, but also can carry out the technical effect of SF6 test.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention;
FIG. 1 is a schematic structural diagram of an SF6 density relay verification device in the present application;
fig. 2 is a schematic structural diagram of a multi-channel gas circuit socket in the present application;
FIG. 3 is a schematic structural view of the transporter in the present application;
fig. 4 is a schematic structural view of the transport case in the present application.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. In addition, the embodiments of the present application and the features in the embodiments may be combined with each other without conflicting with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than within the scope of the description, and the scope of the invention is therefore not limited to the specific embodiments disclosed below.
Referring to fig. 1, the present application provides an SF6 density relay calibration device based on secondary signals, the device includes:
SF6 gas cylinder 1, air pump 2, first gas circuit 3, a plurality of second gas circuits 4, a plurality of third gas circuits 5, multichannel gas circuit socket 6, electronic pressure gauge 7, touch display 8, SF6 test instrument 10 and controller 9;
the SF6 gas cylinder is communicated with the gas pump through a gas pipe, the gas pump is communicated with the gas inlet of the multi-channel gas circuit socket through a first gas circuit, and one end of the second gas circuit and one end of the third gas circuit are respectively communicated with a plurality of gas outlets of the multi-channel gas circuit socket; the electronic pressure gauge is communicated with the first air passage through an air pipe, the touch display is connected with the electronic pressure gauge, and the other end of the second air passage is connected with the air passage connecting end of the SF6 density relay 11 to be checked; the other end of the third air path is communicated with an SF6 test instrument; the first air passage is provided with a first electromagnetic valve, the second air passage is provided with a second electromagnetic valve, the third air passage is provided with a third electromagnetic valve, and the air pump, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are all connected with the controller.
The principle of the invention is as follows: when the SF6 density relay is required to be checked, the air pump, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are opened through the controller, SF6 gas is transmitted to the multi-channel gas circuit socket through the first gas circuit, then the SF6 gas is transmitted to the SF6 density relay to be detected through the second gas circuit, and the SF6 density relay is checked; when SF6 gas test is needed, opening an air pump, a first electromagnetic valve and a third electromagnetic valve through a controller, closing a second electromagnetic valve, transmitting SF6 gas to a multi-channel gas circuit socket through a first gas circuit, and transmitting the SF6 gas to an SF6 test instrument through a third gas circuit to test the SF6 gas; not only can the conventional SF6 density relay check be performed, but also SF6 tests can be performed.
In the embodiment of the application, the circuit connection end of the SF6 density relay is connected with the terminal strip of the secondary control cubicle, and the controller is connected with the terminal strip of the secondary control cubicle. Under the original technical background, need dismantle SF6 density relay secondary signal line, not only have certain security risk, and partial early SF6 density can not dismantle, leads to on-the-spot unable check-up, and this scheme is got the signal based on secondary cable line, not only can avoid tearing open the security risk that connects secondary signal line to bring, and can very big reduction work load, can accomplish the density relay check-up that partial can't dismantle simultaneously. Meanwhile, other SF6 testers can share the test air path by utilizing results, one-time joint is completed, and a plurality of test projects are completed.
In this embodiment of the present application, the device further includes a power supply and a voltage reduction chip, the power supply is connected with the SF6 density relay and the controller through the voltage reduction chip, and the voltage reduction chip converts the input 24V into 5V and 3.3V, the 5V is the relay power supply, and the 3.3V is the control chip power supply. The buck chip is a common chip in the prior art.
In this embodiment, referring to fig. 2, the multi-path gas circuit socket includes:
the cuboid shell 12, the shell lower surface middle part is equipped with air inlet 13, and the shell upper surface evenly is equipped with a plurality of gas outlets 14, is the cavity form in the shell, and air inlet and gas outlet all communicate with the cavity.
In the embodiment of the application, each air outlet is provided with a fourth electromagnetic valve, and the fourth electromagnetic valves are connected with the controller. The controller can control the opening and closing of the fourth electromagnetic valve, so that the air flow in the device can be accurately controlled.
In this application embodiment, please refer to fig. 3-4, the traditional mode is to take SF6 density relay back to the laboratory for verification, and this application utilizes transport vechicle 15 to carry the device all on-spot to test, need not to pull down SF6 density relay, the device still includes transport vechicle 15, be fixed with transport case 16 and gas pump 18 on the transport vechicle, transport incasement is fixed with SF6 gas storage tank 17, be equipped with SF6 gas cylinder storage cabinet 19 in the transport incasement, be equipped with a plurality of different recesses 20 of size on the SF6 gas cylinder storage cabinet, all deposited the SF6 gas cylinder that the capacity is different in every recess, SF6 gas cylinder on the SF6 gas storage cabinet communicates with the gas pump through gas pipe 21, gas pump and SF6 gas storage tank intercommunication. The storage tank for storing a large amount of SF6 gas is stored in the transport vehicle, a plurality of SF6 gas cylinders can be inflated through the SF6 gas storage tank, the gas content of each SF6 gas cylinder is different, a tester can flexibly determine the type and the quantity of the gas cylinder to be worn according to the requirements of the site, the fact that the SF6 gas cylinder is carried too much once is avoided, or the SF6 gas cylinder is carried too little to be inspected is avoided, the traditional SF6 gas cylinder is similar to the existing liquefied tank, the quality is large, the SF6 gas cylinder is inconvenient to carry to the site for testing, and the SF6 gas is not used much for each test, so that the transport vehicle is arranged, a large amount of SF6 gas storage tanks can be placed on the vehicle, and each time the SF6 gas cylinder with corresponding capacity is only required to be worn for the site test, and the transport is convenient.
In this embodiment of the present application, three columns 22 are further disposed in the transport case, and are respectively used for winding and storing the first air channel, the second air channel and the third air channel, and a second storage cabinet 23 is further disposed in the transport case, and is used for storing the multi-channel air channel plug-in board, the electronic pressure gauge, the touch display, the SF6 test instrument and the controller. The cylinder is convenient for the air path to wind on, and is convenient for storage.
In this embodiment of the present application, an air tightness detection device is further disposed in the transport case. The air tightness detection equipment is utilized to detect the air tightness of the device, so that the accuracy of device inspection can be controlled conveniently.
In this embodiment of the present application, a cleaning device is further disposed in the transport case. The impurity in the device or the air pipe or the air circuit can be cleaned by the cleaning equipment, so that the normal operation of the inspection test is ensured.
In the embodiment of the application, the SF6 test instrument comprises an SF6 moisture tester, an SF6 purity tester and an SF6 decomposition product tester. SF6 tests can be performed using these testers.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. An SF6 density relay verification device based on secondary signals, the device comprising:
SF6 gas cylinder, air pump, first gas circuit, a plurality of second gas circuit, a plurality of third gas circuit, multichannel gas circuit connect in row, electronic pressure gauge, touch display, SF6 test instrument, controller;
the SF6 gas cylinder is communicated with the gas pump through a gas pipe, the gas pump is communicated with the gas inlet of the multi-channel gas circuit socket through a first gas circuit, and one end of the second gas circuit and one end of the third gas circuit are respectively communicated with a plurality of gas outlets of the multi-channel gas circuit socket;
the electronic pressure gauge is communicated with the first air passage through an air pipe, the touch display is connected with the electronic pressure gauge, and the other end of the second air passage is connected with the air passage connecting end of the SF6 density relay to be checked;
the other end of the third air path is communicated with an SF6 test instrument; the first air passage is provided with a first electromagnetic valve, the second air passage is provided with a second electromagnetic valve, the third air passage is provided with a third electromagnetic valve, and the air pump, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are all connected with the controller;
the device further comprises a transport vehicle, a transport box and an air filling pump are fixed on the transport vehicle, an SF6 gas storage tank is fixed in the transport box, an SF6 gas storage tank is arranged in the transport box, a plurality of grooves with different sizes are formed in the SF6 gas storage tank, SF6 gas cylinders with different capacities are stored in each groove, the SF6 gas cylinders on the SF6 gas storage tank are communicated with the air filling pump through an air filling pipe, and the air filling pump is communicated with the SF6 gas storage tank; the transport box is internally provided with three columns which are respectively used for winding and storing a first air passage, a second air passage and a third air passage, and is internally provided with a second storage cabinet which is used for storing a multi-passage air passage socket, an electronic pressure gauge, a touch display, SF6 test instruments and a controller;
and air tightness detection equipment is also arranged in the transport case.
2. The secondary signal-based SF6 density relay verification device according to claim 1, wherein a circuit connection end of the SF6 density relay is connected with a terminal strip of a secondary control cubicle, and the controller is connected with the terminal strip of the secondary control cubicle.
3. The secondary signal based SF6 density relay verification device of claim 1, further comprising a power supply and a buck chip, the power supply being connected to the SF6 density relay and the controller through the buck chip, the input 24V being converted to 5V and 3.3V by the buck chip, the 5V providing power to the relay, the 3.3V providing power to the control chip.
4. The secondary signal based SF6 density relay verification apparatus of claim 1, wherein the multi-path gas circuit socket comprises: the cuboid shell, the shell lower surface middle part is equipped with the gas inlet, and the shell upper surface evenly is equipped with a plurality of gas outlets, is the cavity form in the shell, and gas inlet and gas outlet all communicate with the cavity.
5. The secondary signal based SF6 density relay verification device of claim 4, wherein each air outlet is provided with a fourth solenoid valve, and the fourth solenoid valve is connected with the controller.
6. The secondary signal-based SF6 density relay verification device of claim 1, wherein a cleaning apparatus is further provided within the transport case.
7. The secondary signal-based SF6 density relay verification device of claim 1, wherein the SF6 test instrument comprises an SF6 moisture tester, an SF6 purity tester, an SF6 decomposition product tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444602.0A CN109342938B (en) | 2018-11-29 | 2018-11-29 | SF6 density relay calibration device based on secondary signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444602.0A CN109342938B (en) | 2018-11-29 | 2018-11-29 | SF6 density relay calibration device based on secondary signal |
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| Publication Number | Publication Date |
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| CN109342938A CN109342938A (en) | 2019-02-15 |
| CN109342938B true CN109342938B (en) | 2024-03-15 |
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| CN201811444602.0A Active CN109342938B (en) | 2018-11-29 | 2018-11-29 | SF6 density relay calibration device based on secondary signal |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110441005B (en) * | 2019-07-29 | 2021-08-31 | 国网福建省电力有限公司检修分公司 | SF6 density relay air leakage rapid detection device and method |
| CN112798398A (en) * | 2020-12-30 | 2021-05-14 | 广西电网有限责任公司电力科学研究院 | Be used for GIS density relay gas pressure testing arrangement |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201004041Y (en) * | 2007-01-08 | 2008-01-09 | 苏丽芳 | SF6 air density relay calibrator for automatic rated value test |
| CN101424596A (en) * | 2008-09-26 | 2009-05-06 | 上海电力设备安装有限公司 | Calibration stand and calibration method for SF6 gas density and pressure monitoring device |
| CN201327463Y (en) * | 2008-11-15 | 2009-10-14 | 赤峰电业局 | Comprehensive parameter tester for SF 6 density electrical relay |
| CN101937060A (en) * | 2010-09-09 | 2011-01-05 | 辽宁省电力有限公司抚顺供电公司 | Checking system and checking method for sulfur hexafluoride density relay |
| CN202453470U (en) * | 2012-02-13 | 2012-09-26 | 福建瑞能博尔电力设备有限公司 | Checking instrument for SF6 gas density relay |
| CN102879733A (en) * | 2012-09-19 | 2013-01-16 | 宁夏电力公司电力科学研究院 | Gas compensation based full-temperature SF6 gas density relay checking device |
| CN209198622U (en) * | 2018-11-29 | 2019-08-02 | 国网四川省电力公司检修公司 | A kind of SF6 density monitor calibration equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7155956B2 (en) * | 2004-01-23 | 2007-01-02 | Terasen Gas Inc. | Medium, method and system for proving a turbine meter |
-
2018
- 2018-11-29 CN CN201811444602.0A patent/CN109342938B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201004041Y (en) * | 2007-01-08 | 2008-01-09 | 苏丽芳 | SF6 air density relay calibrator for automatic rated value test |
| CN101424596A (en) * | 2008-09-26 | 2009-05-06 | 上海电力设备安装有限公司 | Calibration stand and calibration method for SF6 gas density and pressure monitoring device |
| CN201327463Y (en) * | 2008-11-15 | 2009-10-14 | 赤峰电业局 | Comprehensive parameter tester for SF 6 density electrical relay |
| CN101937060A (en) * | 2010-09-09 | 2011-01-05 | 辽宁省电力有限公司抚顺供电公司 | Checking system and checking method for sulfur hexafluoride density relay |
| CN202453470U (en) * | 2012-02-13 | 2012-09-26 | 福建瑞能博尔电力设备有限公司 | Checking instrument for SF6 gas density relay |
| CN102879733A (en) * | 2012-09-19 | 2013-01-16 | 宁夏电力公司电力科学研究院 | Gas compensation based full-temperature SF6 gas density relay checking device |
| CN209198622U (en) * | 2018-11-29 | 2019-08-02 | 国网四川省电力公司检修公司 | A kind of SF6 density monitor calibration equipment |
Non-Patent Citations (2)
| Title |
|---|
| SF6断路器综合在先监测系统的开发;孙佳林等;华东电力;第35卷(第2期);71-73 * |
| 非接触式SF 6 密度继电器校验试验平台的研制;张作鹏等;电测与仪表;第49卷(第553期);41-44、62 * |
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