CN215813294U - Electronic type capacitance partial pressure and variable temperature test system - Google Patents
Electronic type capacitance partial pressure and variable temperature test system Download PDFInfo
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- CN215813294U CN215813294U CN202121009947.0U CN202121009947U CN215813294U CN 215813294 U CN215813294 U CN 215813294U CN 202121009947 U CN202121009947 U CN 202121009947U CN 215813294 U CN215813294 U CN 215813294U
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Abstract
The utility model discloses an electronic type capacitance partial pressure and variable temperature test system, which belongs to the field of electric energy metering and comprises a low-voltage module, a voltage transformer, a high-voltage arm capacitance and variable temperature module, a low-voltage arm capacitance electricity taking module and a verification module, wherein the low-voltage module, the voltage transformer, the high-voltage arm capacitance and variable temperature module and the low-voltage arm capacitance electricity taking module are sequentially communicated, the verification module is connected with the low-voltage module in parallel, and the verification module is also connected with the low-voltage arm capacitance electricity taking module in parallel. The utility model has the beneficial effects that: the high-voltage arm capacitor temperature changing module and the low-voltage arm capacitor electricity taking module are used for separating a test environment, the later temperature compensation difficulty is reduced, the low-voltage arm capacitor electricity taking module can be arranged in a 20 ℃ environment together with a secondary circuit for secondary fusion, the precision of equipment is guaranteed, and the circuit is suitable for a secondary fusion direction.
Description
Technical Field
The utility model belongs to the field of electric energy metering, and particularly relates to an electronic type capacitance voltage-dividing and temperature-changing test system.
Background
From the black dragon river of minus 40 ℃ in winter to the Guangdong Shaoguan of more than 40 ℃ in summer, the China power grid spreads over the whole China from north to south and bears the most extreme temperature of China, the pole switch is widely used for improving the reliability of the power grid as a high-voltage distribution device and is largely installed in the outdoor environment, and the electronic type capacitive voltage divider is used as a voltage dividing device in the poured pole switch, so the electronic type capacitive voltage divider is also easily influenced by the environmental temperature.
At present, the main material poured by the column switch in China is epoxy resin, the epoxy resin is a high molecular polymer and has better heat resistance, moisture resistance and electrical insulation, but the epoxy resin is expensive and is not suitable for colleges and research places needing a large amount of data contrast tests, the inner capacitance cannot be changed and observed after the column switch is poured, meanwhile, the real-time accurate test on the inner temperature of the epoxy resin is difficult, and the problem of difficult lighting test is solved The circuit is various and disordered and the like, and is more easily influenced by the temperature.
In the early 2021, the first case of the national grid GIS was successful in the first time equipment fusion trial, and the first time and second time fusion trial solves the problems of the traditional feeder cabinet secondary loop relay and circuit, such as complexity, difficulty in debugging and the like, the standardized operating circuit board is used for replacing complicated wiring and relays, the number of equipment elements is greatly reduced, the volume of the feeder cabinet is reduced, and the first time and second time fusion can be inferred to be the main trend of the column switch in the next few years.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems that the specific design information of an electronic type capacitor partial pressure test loop in the prior art is relatively lack, the conventional electronic type capacitor partial pressure test loop is expensive in manufacturing cost, manpower and material resources are greatly consumed when a capacitor bank is replaced, the loop is easy to change, and unnecessary variables are generated; in addition, the safety of a test loop built by a few enterprises does not meet the high-voltage regulation and the like, the utility model provides an electronic type capacitance voltage-dividing and temperature-changing test system which comprises a low-voltage module, a voltage transformer, a high-voltage arm capacitance temperature-changing module, a low-voltage arm capacitance electricity-taking module and a checking module, wherein the low-voltage module, the voltage transformer, the high-voltage arm capacitance temperature-changing module and the low-voltage arm capacitance electricity-taking module are sequentially communicated, the checking module is connected with the low-voltage module in parallel, and the checking module is also connected with the low-voltage arm capacitance electricity-taking module in parallel.
The high-voltage arm capacitor temperature changing module and the low-voltage arm capacitor electricity taking module are used for separating a test environment, the later temperature compensation difficulty is reduced, the low-voltage arm capacitor electricity taking module can be arranged in a 20 ℃ environment together with a secondary circuit for secondary fusion, the precision of equipment is guaranteed, and the circuit is suitable for a secondary fusion direction.
Preferably, the low pressure module include the power, from taking overload protection insert the row, with insert row corresponding plug, voltage regulator and high accuracy universal meter, the power with insert the row and connect, the zero line and the live wire of plug insert voltage regulator input voltage end, the output voltage end of voltage regulator with voltage transformer is connected, the live wire of voltage regulator output is parallelly connected with the zero line and is gone up the high accuracy universal meter, the earthing terminal of voltage regulator passes through the ground wire and is connected with the ground point. In practical operation, the power supply is 220V, the length of the plug is at least 2m, and a fuse with the rated current of 32A is connected to the live wire of the plug, and the plug and the socket with the overload protection can protect the life safety of a tester.
Preferably, the voltage transformer comprises a secondary side arranged at the low connection side and a primary side arranged at the high-voltage output side, the secondary side is connected with the output voltage end of the voltage regulator, the high-voltage end of the primary side is connected to the high-voltage arm capacitance temperature changing module, the primary side grounding end is connected with the grounding point through a ground wire, and the precision grade of the voltage transformer is 0.5 grade.
Preferably, the low-voltage module is connected in parallel with the verification module through the secondary side.
Preferably, the high-voltage arm capacitance temperature-changing module comprises a constant-temperature and constant-humidity test box, a high-voltage arm capacitance, a transformer oil tank and a temperature transformer.
Preferably, the temperature adjustable range of the constant temperature and humidity test box is-40-150 ℃, the humidity can be stabilized to 0%, an insulating pad is placed at the bottom in the constant temperature and humidity test box, the transformer oil tank is placed at the top of the insulating pad, the high-voltage arm capacitor is vertically placed in the middle of the transformer oil tank, and the temperature transformer is placed in the transformer oil tank.
Through arranging temperature transformer in transformer tank, real time monitoring transformer oil temperature, the environment in the column switch is arranged in to perfect simulation high-tension arm electric capacity to can carry out real time monitoring to the temperature in the environment, ensure the safety of equipment such as testing personnel and constant temperature and humidity proof box simultaneously.
Preferably, the top end of the high-voltage arm capacitor is connected with the primary side high-voltage end, and the bottom end of the high-voltage arm capacitor is connected to the low-voltage arm capacitor power-taking module.
Preferably, the low-voltage arm capacitor electricity-taking module comprises a constant-temperature and constant-humidity device and a low-voltage arm capacitor, the low-voltage arm capacitor is suspended in the middle of the constant-temperature and constant-humidity device, and the low-voltage arm capacitor electricity-taking module is connected in parallel with the checking module through a low-voltage line. In practical use, the constant temperature and humidity device is maintained at a normal temperature of 20 ℃ and a humidity of 0%, so that the accuracy of a secondary side circuit can be improved.
Preferably, the top end of the low-voltage arm capacitor is connected with the bottom end of the high-voltage arm capacitor, the top end of the low-voltage arm capacitor is further connected with the verification module, and the bottom end of the low-voltage arm capacitor is connected with the grounding point.
Preferably, the calibration module comprises a standard voltage transformer and a transformer calibrator, the standard voltage transformer is connected with the transformer calibrator, a 10KV input end of the standard voltage transformer is connected in parallel with the primary side, an electronic voltage signal end of the transformer calibrator is connected with the top end of the low-voltage arm capacitor, and an electronic small-signal common end of the transformer calibrator is connected with the ground point.
An electronic voltage signal end of an electronic type input to be tested of the transformer calibrator is connected with the top end of the low-voltage arm capacitor, an electronic small signal common end of the electronic type input to be tested of the transformer calibrator is connected with a grounding point, a standard electromagnetic input end of the transformer calibrator is connected with a standard voltage transformer, and a 10KV input end of the standard voltage transformer is connected with a primary side of the voltage transformer in parallel, so that the specific difference and the angular difference of the electronic type capacitor voltage-dividing transformer are tested.
The utility model also provides an electronic capacitance partial pressure and variable temperature test method, which adopts the electronic capacitance partial pressure and variable temperature test system device to carry out process treatment and comprises the following steps:
the method comprises the following steps that firstly, power is supplied through a power supply, 220V voltage enters the input end of a voltage regulator through a live wire with a fuse, and the voltage is output after the voltage is regulated by the voltage regulator and is compared with a high-precision universal meter;
secondly, the voltage after voltage regulation enters a voltage transformer through a secondary side, the voltage is boosted through an internal winding of the voltage transformer, and the boosted voltage is output through a primary side;
and step three, the boosted voltage is introduced into a constant temperature and humidity test box through a high-voltage special line and is applied to the positive electrode of the high-voltage arm capacitor, outdoor environment temperature change can be simulated by controlling the temperature and the humidity of the constant temperature and humidity test box, the environment of the high-voltage arm capacitor in the column switch can be perfectly simulated by real-time monitoring of the temperature transformer and the high specific heat capacity and high insulation characteristics of transformer oil, the relation between the temperature and the voltage data can be observed in real time, and the safety of equipment and personnel is guaranteed.
And step four, dividing the voltage applied by the voltage transformer by the low-voltage arm capacitor according to the required proportion, and providing a normal-temperature (20 ℃) and humidity-free environment for the low-voltage arm capacitor by the constant-temperature and humidity device.
And fifthly, inputting the low-voltage arm capacitor voltage into an electronic measured input end of the transformer calibrator as a measured signal, outputting the voltage boosted by the voltage transformer to a standard electromagnetic input end of the transformer calibrator after proportional voltage reduction by an internal winding of the standard transformer through a high-voltage end of the standard transformer, and calculating a difference value between the standard signal and the measured signal to obtain a specific difference.
On the one hand, pour the environment through the epoxy who uses in the transformer oil simulation column switch, avoid experimental capacitor of a type just need pour the condition once, practice thrift the test cost by a wide margin, in addition, capacitor transformer oil internal test can more accurate test environment temperature, on the other hand, through install built-in overload protection insert row additional, test circuit puts apart from the test bench distance more than 1.5m at least, live wire series fuse and each high-voltage equipment mode such as wiring altogether protect the tester.
The utility model adopts the process technologies of transformer oil simulation environment, primary and secondary capacitor environment separation, common grounding of high-voltage equipment, overload protection, safety isolation and the like to reduce the test cost, responds to the primary and secondary fusion requirements of the national power grid, and has high loop reliability and strong test safety.
Has the advantages that:
the technical scheme of the utility model has the following beneficial effects:
(1) the high-voltage arm capacitor temperature changing module and the low-voltage arm capacitor electricity taking module are used for separating a test environment, the later temperature compensation difficulty is reduced, the low-voltage arm capacitor electricity taking module can be arranged in a 20 ℃ environment together with a secondary circuit for secondary fusion, the precision of equipment is guaranteed, and the circuit is suitable for a secondary fusion direction.
(2) Through using the epoxy resin in the transformer oil simulation column switch to pour the environment, avoid experimental type condenser just need pour the condition once, practice thrift the experimentation cost by a wide margin, in addition, capacitor transformer oil internal test can more accurate test ambient temperature.
(3) The protection method is characterized in that the protection method is used for protecting testers in a mode that an inserted row with built-in overload protection is additionally arranged, a test loop is placed at a distance of at least more than 1.5m away from a test bed, a live wire series fuse is connected with each high-voltage device in a common-ground mode, and the like.
(4) The process technologies such as transformer oil simulation environment, primary and secondary capacitor environment separation, high-voltage equipment common ground, overload protection, safety isolation and the like are adopted to reduce the test cost, respond to the primary and secondary fusion requirements of the national power grid, and have high loop reliability and strong test safety.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of an electronic capacitance voltage-dividing and temperature-varying test system according to a preferred embodiment of the present invention.
In the figure:
1-a low-voltage module; 11-a power supply; 12-a power strip; 13-a plug; 131-zero line; 132-a fire line;
14-a voltage regulator; 15-a high precision multimeter; 2-a voltage transformer; 21-minor edge; 22-primary side;
3-a high-voltage arm capacitance temperature-changing module; 31-constant temperature and humidity test chamber; 32-high voltage arm capacitance;
33-transformer tank; 34-a temperature transformer; 4-a low-voltage arm capacitance electricity-taking module;
41-a constant temperature and humidity device; 42-low voltage arm capacitance; 5-a checking module; 51-standard voltage transformer; 52-transformer calibrator; 6-grounding end; 7-a ground point; 8-fuse.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the electronic capacitance partial pressure and temperature variation test system includes a low-voltage module 1, a voltage transformer 2, a high-voltage arm capacitance temperature variation module 3, a low-voltage arm capacitance power-taking module 4 and a verification module 5, wherein the low-voltage module 1, the voltage transformer 2, the high-voltage arm capacitance temperature variation module 3 and the low-voltage arm capacitance power-taking module 4 are sequentially communicated, the verification module 5 is connected with the low-voltage module 1 in parallel, and the verification module 5 is connected with the low-voltage arm capacitance power-taking module 4 in parallel.
Through high-voltage arm electric capacity alternating temperature module 3 and low-voltage arm electric capacity get electric module 4 and separate the test environment, reduce the later stage temperature compensation degree of difficulty, low-voltage arm electric capacity gets electric module 4 and can arrange in 20 ℃ of the environment together with the secondary circuit that a secondary fuses in, guarantees the equipment precision for this return circuit is applicable to a secondary and fuses the direction.
As a preferred embodiment, the low voltage module 1 includes a power supply 11, a power strip 12 with overload protection, a plug 13 corresponding to the power strip 12, a voltage regulator 14, and a high precision multimeter 15, the power supply 11 is connected to the power strip 12, a zero line 131 and a live line 132 of the plug 13 are connected to an input voltage end of the voltage regulator 14, an output voltage end of the voltage regulator 14 is connected to the voltage transformer 2, the live line 132 and the zero line 131 at an output end of the voltage regulator 14 are connected in parallel to the high precision multimeter 15, and a ground terminal 6 of the voltage regulator 14 is connected to a ground point 7 through a ground wire. In practical operation, the power supply 11 is 220V, the length of the plug 13 is at least 2m, and the live wire 132 of the plug is connected with the fuse 8 with the rated current of 32A, and the plug 13 and the socket 12 with the overload protection can protect the life safety of a tester.
As a preferred embodiment, the voltage transformer 2 includes a secondary side 21 disposed at a low connection side and a primary side 22 disposed at a high-voltage output side, the secondary side 21 is connected to an output voltage end of the voltage regulator 14, a high-voltage end of the primary side 22 is connected to the high-voltage arm capacitance temperature changing module 3, a ground end 6 of the primary side 22 is connected to a ground point 7 through a ground wire, and the precision grade of the voltage transformer 2 is 0.5 grade.
In a preferred embodiment, the low-voltage module 1 is connected in parallel to the calibration module 5 via the secondary side 21.
In a preferred embodiment, the high-voltage arm capacitance temperature changing module 3 includes a constant temperature and humidity test box 31, a high-voltage arm capacitance 32, a transformer oil tank 33 and a temperature transformer 34.
As a preferred embodiment, the temperature adjustable range of the constant temperature and humidity test box 31 is-40 ℃ to 150 ℃, the humidity can be stabilized to 0%, an insulating pad is placed at the bottom in the constant temperature and humidity test box 31, the transformer oil tank 33 is placed at the top of the insulating pad, the high-voltage arm capacitor 32 is vertically placed in the middle of the transformer oil tank 33, and the temperature transformer 34 is placed in the transformer oil tank 33.
Through arranging temperature transformer 34 in transformer tank 33, real time monitoring transformer oil temperature, perfect simulation high-voltage arm electric capacity 32 arranges the environment in the column switch in to can carry out real time monitoring to the temperature in the environment, ensure the safety of equipment such as testing personnel and constant temperature and humidity proof box 31 simultaneously.
As a preferred embodiment, the top end of the high-voltage arm capacitor 32 is connected to the high-voltage end of the primary side 22, and the bottom end of the high-voltage arm capacitor 32 is connected to the low-voltage arm capacitor electricity-taking module 4.
As a preferred embodiment, the low-voltage arm capacitance power-taking module 4 includes a constant temperature and humidity device 41 and a low-voltage arm capacitance 42, the low-voltage arm capacitance 42 is suspended in the middle of the constant temperature and humidity device 41, and the low-voltage arm capacitance power-taking module 4 is connected in parallel with the verification module 5 through a low voltage line. In actual use, the constant temperature and humidity device 41 is maintained at a normal temperature of 20 ℃ and a humidity of 0%, so that the accuracy of the secondary circuit can be improved.
In a preferred embodiment, the top end of the low-voltage arm capacitor 42 is connected to the bottom end of the high-voltage arm capacitor 32, the top end of the low-voltage arm capacitor 42 is further connected to the verification module 5, and the bottom end of the low-voltage arm capacitor 42 is connected to the ground point 7.
As a preferred embodiment, the calibration module 5 includes a standard voltage transformer 51 and a transformer calibrator 52, the standard voltage transformer 51 is connected to the transformer calibrator 52, a 10KV input terminal of the standard voltage transformer 51 is connected in parallel to the primary side 22, an electronic voltage signal terminal of the transformer calibrator 52 is connected to the top end of the low-voltage arm capacitor 42, and an electronic small-signal common terminal of the transformer calibrator 52 is connected to the ground point 7.
An electronic voltage signal end of an electronic type input to be tested of the transformer calibrator 52 is connected to the top end of the low-voltage arm capacitor 42, a common end of an electronic type small signal input to be tested of the transformer calibrator 52 is connected to the grounding point 7, a standard electromagnetic input end of the transformer calibrator 52 is connected to the standard voltage transformer 51, and a 10KV input end of the standard voltage transformer 51 is connected in parallel to the primary side 22 of the voltage transformer 2, so that the specific difference and the angular difference of the electronic type capacitor voltage-dividing transformer are tested.
The embodiment also provides an electronic capacitance partial pressure and temperature change test method, which adopts the electronic capacitance partial pressure and temperature change test system device to perform process treatment, and comprises the following steps:
supplying power by a power supply 11, enabling 220V voltage to enter an input end of a voltage regulator 14 through a live wire 132 with a fuse 8, regulating the voltage by the voltage regulator 14, and comparing the voltage with a high-precision universal meter 15 to output;
secondly, the voltage after voltage regulation enters the voltage transformer 2 through the secondary side 21, the voltage is boosted through an internal winding of the voltage transformer 2, and the boosted voltage is output through the primary side 22;
and step three, the boosted voltage is introduced into a constant temperature and humidity test box 31 through a high-voltage special line and is applied to the anode of the high-voltage arm capacitor 32, the outdoor environment temperature change can be simulated by controlling the temperature and the humidity of the constant temperature and humidity test box 31, the environment of the high-voltage arm capacitor 32 in the column switch can be perfectly simulated by the real-time monitoring of the temperature transformer 34 and the high specific heat capacity and high insulation characteristics of transformer oil, the relation between the temperature and the voltage data can be observed in real time, and the safety of equipment and personnel is guaranteed.
And step four, dividing the voltage applied by the voltage transformer 2 by the low-voltage arm capacitor 42 according to the required proportion, and providing a normal-temperature (20 ℃) and humidity-free environment for the low-voltage arm capacitor 42 by the constant-temperature and humidity device 41.
And step five, inputting the voltage of the low-voltage arm capacitor 42 into an electronic detected input end of the transformer calibrator 52 as a detected signal, outputting the voltage boosted by the voltage transformer 2 to a standard electromagnetic input end of the transformer calibrator 52 after proportional voltage reduction by an internal winding of a standard transformer through a high-voltage end of the standard transformer, and calculating a difference value between the standard signal and the detected signal to obtain a ratio difference.
On the one hand, pour the environment through the epoxy who uses in the transformer oil simulation column switch, avoid experimental capacitor of a type just need pour the condition once, practice thrift the test cost by a wide margin, in addition, capacitor transformer oil internal test can more accurate test environment temperature, on the other hand, through installing additional the row of inserting 12 of built-in overload protection, test circuit puts apart from the test bench distance more than 1.5m at least, live wire 132 series connection fuse 8 protects experimenter with modes such as each high-voltage equipment common ground wiring.
The utility model adopts the process technologies of transformer oil simulation environment, primary and secondary capacitor environment separation, common grounding of high-voltage equipment, overload protection, safety isolation and the like to reduce the test cost, responds to the primary and secondary fusion requirements of the national power grid, and has high loop reliability and strong test safety.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The electronic type capacitance voltage-dividing and temperature-changing test system is characterized by comprising a low-voltage module, a voltage transformer, a high-voltage arm capacitance temperature-changing module, a low-voltage arm capacitance electricity-taking module and a checking module, wherein the low-voltage module, the voltage transformer, the high-voltage arm capacitance temperature-changing module and the low-voltage arm capacitance electricity-taking module are sequentially communicated, the checking module is connected with the low-voltage module in parallel, and the checking module is connected with the low-voltage arm capacitance electricity-taking module in parallel.
2. The electronic capacitance voltage-dividing and temperature-changing test system according to claim 1, wherein the low voltage module comprises a power supply, a power strip with overload protection, a plug corresponding to the power strip, a voltage regulator and a high-precision multimeter, the power supply is connected with the power strip, a zero line and a live line of the plug are connected to the input voltage end of the voltage regulator, the output voltage end of the voltage regulator is connected with the voltage transformer, the live line and the zero line at the output end of the voltage regulator are connected in parallel with the high-precision multimeter, and the grounding end of the voltage regulator is connected with the grounding point through a ground wire.
3. The electronic capacitance voltage-dividing and temperature-changing test system according to claim 2, wherein the voltage transformer comprises a secondary side disposed at the low connection side and a primary side disposed at the high-voltage output side, the secondary side is connected to the output voltage terminal of the voltage regulator, the high-voltage terminal of the primary side is connected to the high-voltage arm capacitance temperature-changing module, and the ground terminal of the primary side is connected to the ground point through a ground wire.
4. The electronic capacitance voltage and temperature division and variation test system according to claim 3, wherein the low voltage module is connected in parallel with the verification module through the secondary side.
5. The electronic capacitance voltage-dividing and temperature-varying test system according to claim 3, wherein the high-voltage arm capacitance-varying module comprises a constant-temperature and constant-humidity test box, a high-voltage arm capacitor, a transformer oil tank and a temperature transformer.
6. The electronic capacitance voltage-dividing and temperature-changing test system according to claim 5, wherein an insulating pad is placed at the bottom in the constant temperature and humidity test chamber, the transformer oil tank is placed at the top of the insulating pad, the high-voltage arm capacitor is vertically placed in the middle of the transformer oil tank, and the temperature transformer is placed in the transformer oil tank.
7. The electronic capacitance voltage-dividing and temperature-varying test system according to claim 6, wherein the top end of the high-voltage arm capacitor is connected to the primary high-voltage end, and the bottom end of the high-voltage arm capacitor is connected to the low-voltage arm capacitor electricity-taking module.
8. The electronic capacitance voltage-dividing and temperature-changing test system according to claim 7, wherein the low-voltage arm capacitance power-taking module comprises a constant-temperature and constant-humidity device and a low-voltage arm capacitance, the low-voltage arm capacitance is suspended in the middle of the constant-temperature and constant-humidity device, and the low-voltage arm capacitance power-taking module is connected in parallel with the verification module through a low-voltage line.
9. The electronic capacitance voltage-dividing and temperature-varying test system according to claim 8, wherein the top end of the low-voltage arm capacitor is connected to the bottom end of the high-voltage arm capacitor, the top end of the low-voltage arm capacitor is further connected to the calibration module, and the bottom end of the low-voltage arm capacitor is connected to a ground point.
10. The electronic capacitance voltage-dividing and temperature-changing test system according to claim 9, wherein the calibration module comprises a standard voltage transformer and a transformer calibrator, the standard voltage transformer is connected to the transformer calibrator, a 10KV input terminal of the standard voltage transformer is connected in parallel to the primary side, an electronic voltage signal terminal of the transformer calibrator is connected to the top end of the low-voltage arm capacitor, and an electronic small-signal common terminal of the transformer calibrator is connected to a ground point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121009947.0U CN215813294U (en) | 2021-05-12 | 2021-05-12 | Electronic type capacitance partial pressure and variable temperature test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121009947.0U CN215813294U (en) | 2021-05-12 | 2021-05-12 | Electronic type capacitance partial pressure and variable temperature test system |
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| CN215813294U true CN215813294U (en) | 2022-02-11 |
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