CN210243747U - Different-frequency full-automatic dielectric loss tester - Google Patents
Different-frequency full-automatic dielectric loss tester Download PDFInfo
- Publication number
- CN210243747U CN210243747U CN201920249362.2U CN201920249362U CN210243747U CN 210243747 U CN210243747 U CN 210243747U CN 201920249362 U CN201920249362 U CN 201920249362U CN 210243747 U CN210243747 U CN 210243747U
- Authority
- CN
- China
- Prior art keywords
- machine body
- power supply
- capacitor
- socket
- dielectric loss
- 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.)
- Active
Links
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a pilot frequency full-automatic dielectric loss tester, which comprises a machine body and a circuit component arranged inside the machine body; a sample input socket is arranged at the upper part of the front surface of the machine body, a self-excitation output socket, a printer and a display screen are arranged at the middle part of the machine body, and a power input socket is arranged at the bottom of the machine body; the back of the machine body is provided with a high-voltage output HV socket; the circuit assembly comprises a digital signal processor, a measuring circuit, a capacitor, an inverter power supply and a step-up transformer; the input end of the digital signal processor is connected with a power supply, and the output end of the digital signal processor is connected with one end of the capacitor through the measuring circuit; the input end of the inverter is connected with the power supply, and the output end of the inverter is connected with the input end of the step-up transformer; the output end of the boosting transformer is connected with the other end of the capacitor through the isolating switch; the medium loss is tested in a variable frequency mode, the frequency can be changed into 45Hz or 55Hz, 55Hz or 65Hz, and meanwhile, the interference of a power frequency electric field to the test is avoided by utilizing a digital trap technology, so that the problem of accurate measurement under the interference of a strong electric field is solved.
Description
Technical Field
The utility model relates to a dielectric loss test technical field, especially a full-automatic dielectric loss tester of pilot frequency.
Background
The dielectric loss tester is used in power plant, transformer substation and other fields or laboratories to test dielectric loss tangent value and capacitance of various high voltage power equipment.
Generally, when a test medium is damaged, because the power supply frequency cannot be adjusted, the digital trap technology cannot be adopted to avoid the interference of a power frequency electric field to the test, and the measurement value is inaccurate under the interference of a strong electric field.
SUMMERY OF THE UTILITY MODEL
To the various not enough that exist among the prior art, the utility model aims at providing a full-automatic dielectric loss tester of pilot frequency can the effectual problem of solving among the background art.
The utility model discloses a pilot frequency full-automatic dielectric loss tester, which comprises a machine body and a circuit component arranged in the machine body; a sample input socket is arranged at the upper part of the front surface of the machine body, a self-excitation output socket, a printer and a display screen are arranged at the middle part of the machine body, and a power input socket is arranged at the bottom of the machine body; the back of the machine body is provided with a high-voltage output HV socket; the circuit assembly comprises a digital signal processor, a measuring circuit, a capacitor, an inverter power supply and a step-up transformer; the input end of the digital signal processor is connected with a power supply, and the output end of the digital signal processor is connected with one end of the capacitor through the measuring circuit; the input end of the inverter is connected with the power supply, and the output end of the inverter is connected with the input end of the step-up transformer; the output end of the boosting transformer is connected with the other end of the capacitor through the isolating switch; the measuring circuit comprises a sampling resistor, a preamplifier and an A/D converter; one end of the sampling resistor is connected with the capacitor, the other end of the sampling resistor is connected with one end of the A/D converter through the preamplifier, and the other end of the A/D converter is connected with the digital signal processor.
Preferably, the front surface of the machine body is also provided with a key for controlling the display screen.
Preferably, the front surface of the machine body is also provided with a grounding terminal.
Preferably, the front surface of the machine body is also provided with a high-voltage indicator lamp.
Preferably, the front surface of the machine body is also provided with a power switch.
The utility model has the advantages that: the medium loss of the variable-frequency test is realized, the frequency can be changed into 45Hz or 55Hz, 55Hz or 65Hz, and the interference of a power frequency electric field to the test is avoided by utilizing a digital trap technology, so that the problem of accurate measurement under the interference of a strong electric field is fundamentally solved; meanwhile, the device is suitable for occasions of power supply detection by the generator after all power failures occur.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a front schematic view of the machine body of the present invention;
FIG. 2 is a schematic view of the back of the body of the present invention;
FIG. 3 is a schematic diagram of the circuit assembly of the present invention;
fig. 4 is a schematic diagram of the measurement circuit of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-3, one embodiment of the present invention provides a pilot frequency full-automatic dielectric loss tester, which includes a machine body 100 and a circuit assembly disposed inside the machine body 100; the upper part of the front surface of the machine body 100 is provided with a sample input socket 110, the middle part is provided with a self-excitation output socket 120, a printer 130 and a display screen 140, and the bottom is provided with a power input socket 150; a high-voltage output HV socket 160 is arranged on the back of the machine body 10;
the circuit components include a digital signal processor 210, a measurement circuit, a capacitor 230, an inverter power supply 240, and a step-up transformer 250; the input end of the digital signal processor 210 is connected to a power supply, and the output end is connected to one end of the capacitor 230 through a measuring circuit; the input end of the inverter 240 is connected with the power supply, and the output end is connected with the input end of the step-up transformer 250; the output terminal of the step-up transformer 250 is connected to the other terminal of the capacitor 230 through an isolation switch;
the measurement circuit includes a sampling resistor 221, a preamplifier 222, and an a/D converter 223; the sampling resistor 221 has one end connected to the capacitor 230 and the other end connected to one end of the a/D converter 223 through the preamplifier 222, and the other end of the a/D converter 223 is connected to the digital signal processor 210.
As a specific embodiment, the front of the body 100 is further provided with a key 141 for controlling the display screen 140.
As a specific embodiment, the front surface of the body 100 is further provided with a ground terminal 170.
As a specific embodiment, the front surface of the machine body 100 is further provided with a high-voltage indicator lamp 180.
As a specific embodiment, the front surface of the body 100 is further provided with a power switch 190.
The working principle is as follows:
the standard loop is composed of a high-stability standard capacitor 230 and a measurement line, and the tested loop is composed of a tested product and a measurement line. The amplitude and phase difference of the standard loop current and the tested loop current are measured by the measuring circuit, and the capacitance and the dielectric loss tangent of the test article are obtained by the digital signal processor 210 through vector operation by using a digital real-time acquisition method.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (5)
1. The utility model provides a full-automatic dielectric loss tester of pilot frequency which characterized in that: comprises a machine body (100) and a circuit component arranged in the machine body (100); a sample input socket (110) is arranged at the upper part of the front surface of the machine body (100), a self-excitation output socket (120), a printer (130) and a display screen (140) are arranged at the middle part, and a power input socket (150) is arranged at the bottom part; a high-voltage output HV socket (160) is arranged on the back of the machine body (100);
the circuit assembly comprises a digital signal processor (210), a measuring circuit, a capacitor (230), an inverter power supply (240) and a step-up transformer (250); the input end of the digital signal processor (210) is connected with a power supply, and the output end of the digital signal processor is connected with one end of the capacitor (230) through the measuring circuit; the input end of the inverter power supply (240) is connected with the power supply, and the output end of the inverter power supply is connected with the input end of the step-up transformer (250); the output end of the boosting transformer (250) is connected with the other end of the capacitor (230) through an isolating switch;
the measurement circuit comprises a sampling resistor (221), a preamplifier (222) and an A/D converter (223); one end of the sampling resistor (221) is connected with the capacitor (230), the other end of the sampling resistor is connected with one end of the A/D converter (223) through the preamplifier (222), and the other end of the A/D converter (223) is connected with the digital signal processor (210).
2. The pilot frequency full-automatic dielectric loss tester according to claim 1, characterized in that: the front surface of the machine body (100) is also provided with a key (141) for controlling the display screen (140).
3. The pilot frequency full-automatic dielectric loss tester according to claim 1, characterized in that: the front surface of the machine body (100) is also provided with a grounding binding post (170).
4. The pilot frequency full-automatic dielectric loss tester according to claim 1, characterized in that: the front surface of the machine body (100) is also provided with a high-voltage indicator lamp (180).
5. The pilot frequency full-automatic dielectric loss tester according to claim 1, characterized in that: the front surface of the machine body (100) is also provided with a power switch (190).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920249362.2U CN210243747U (en) | 2019-02-27 | 2019-02-27 | Different-frequency full-automatic dielectric loss tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920249362.2U CN210243747U (en) | 2019-02-27 | 2019-02-27 | Different-frequency full-automatic dielectric loss tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210243747U true CN210243747U (en) | 2020-04-03 |
Family
ID=69961111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920249362.2U Active CN210243747U (en) | 2019-02-27 | 2019-02-27 | Different-frequency full-automatic dielectric loss tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210243747U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112505426A (en) * | 2020-10-30 | 2021-03-16 | 南京民联仪器制造有限公司 | Cable dielectric loss measuring device working at ultralow frequency band test voltage and measuring method thereof |
-
2019
- 2019-02-27 CN CN201920249362.2U patent/CN210243747U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112505426A (en) * | 2020-10-30 | 2021-03-16 | 南京民联仪器制造有限公司 | Cable dielectric loss measuring device working at ultralow frequency band test voltage and measuring method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207352137U (en) | A kind of adaptor power supplies Auto-Test System | |
| CN202676858U (en) | Partial discharge test system under impulse voltage | |
| CN107632241A (en) | A kind of apparatus and method for testing paper oil insulation partial discharge characteristic | |
| CN204330857U (en) | A kind of isolated neutral system capacitance current proving installation | |
| CN104502821A (en) | Capacitive sensor based on-line switch cabinet partial discharge monitoring system and method | |
| CN102072999A (en) | Connection testing device of electric energy metering device and using method thereof | |
| CN203572883U (en) | Novel intelligent frequency-conversion large-current grounding impedance measuring instrument | |
| CN105606979A (en) | Device for simulating and detecting local discharge of GIS (Geographic Information System) equipment | |
| CN108037430A (en) | A kind of 10kV distribution transformers three-phase partial discharge test system | |
| CN109030963A (en) | A kind of electrostatic field measurement device based on coil vibration | |
| CN110501619B (en) | High-frequency response partial pressure measuring device | |
| CN210243747U (en) | Different-frequency full-automatic dielectric loss tester | |
| CN110208603A (en) | A kind of transformer voltage phase difference measuring apparatus and measurement method | |
| CN110736922B (en) | Device and method for measuring switch-on pre-breakdown time | |
| CN206038774U (en) | Be situated between and decrease tester | |
| CN109342827B (en) | Circuit and method for measuring capacitance value through capacitance alternating current charge and discharge | |
| CN203224571U (en) | A flexible grounding resistance tester | |
| CN110196383A (en) | The method for carrying out ipsilateral high-tension apparatus Partial Discharge Detection using capacitive bottom shielding of bushing | |
| CN212433359U (en) | Power transmission line grounding fault searching instrument | |
| CN211718440U (en) | Oiled paper insulation partial discharge monitoring equipment | |
| CN204422621U (en) | A kind of voltage current waveform sampling module | |
| CN208953591U (en) | A kind of high voltage standard capacitor and high voltage electric equipment dielectric loss measuring set | |
| CN111398697A (en) | Space charge test system and test method under periodic pulse electric field | |
| CN105929249A (en) | Reactive power compensation device capacitance measuring device | |
| CN203204048U (en) | Output voltage measurement circuit for high-voltage frequency converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |