CN214669344U - Electrical parameter comprehensive test instrument of low-voltage distribution network oxide arrester - Google Patents
Electrical parameter comprehensive test instrument of low-voltage distribution network oxide arrester Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 238000002955 isolation Methods 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 49
- 230000003993 interaction Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
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- 238000009434 installation Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- 238000009666 routine test Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
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Abstract
An electrical parameter comprehensive test instrument of an oxide arrester of a low-voltage distribution network comprises a direct-current power supply, a voltage adjusting module, an inverter, a voltage-multiplying rectifier, an isolating circuit, an acquisition module and a control module; the direct-current power supply is connected with the voltage adjusting module and the inverter, the control module is connected with the voltage adjusting module, the control module is connected with the inverter, the inverter is connected with the voltage-multiplying rectifier, the voltage-multiplying rectifier is connected with an isolating circuit, the isolating circuit is connected with the acquisition module, and the acquisition module is connected with the control module; the direct current power supply supplies power to the voltage adjusting module and the inverter; the direct-current voltage output by the direct-current power supply is converted into alternating-current voltage through the inverter; then the voltage is converted into high direct current voltage through the voltage-multiplying rectifier and output; the acquisition module acquires high direct current voltage information output by the voltage-multiplying rectifier through the isolation circuit and transmits the high direct current voltage information to the control module.
Description
Technical Field
The utility model relates to a test electrical parameter field. More specifically, the utility model relates to an electrical parameter integrated test instrument of low voltage distribution network oxide arrester.
Background
The low-voltage oxide lightning arrester is divided into two types: (H) Y1.5WS-0.5/2.6 and (H) Y1.5WS-0.28/1.3, are mainly used in low-voltage distribution networks and are generally arranged on the low-voltage side (the rated voltage is 400V) of a distribution transformer and in a low-voltage reactive power complete set compensation device. The low-voltage distribution network refers to a part of a power line from the low-voltage side of a distribution transformer to a user electric energy metering device, and due to the fact that the low-voltage distribution network is complex in structure, long in line, multiple in points and wide in area, most lines, particularly rural power grid lines, are overhead bare lines, no lightning protection measures are provided, and the probability that distribution network equipment is struck by lightning is very high. In recent years, lightning strikes occur for many times to cause damage accidents of equipment such as distribution transformers, lightning arresters and low-voltage reactive power compensation devices, and the safety and the power supply reliability of distribution network equipment are seriously endangered. Therefore, it is necessary to take effective countermeasures to reduce the occurrence of equipment damage accidents caused by lightning strikes. One of the main measures is to install low-voltage oxide lightning arresters in the low-voltage side of the distribution transformer and a low-voltage reactive power compensation device of a low-voltage distribution network.
The lightning arrester is arranged in the low-voltage reactive power compensation device and has the function of preventing overvoltage of direct lightning and induced lightning from invading the compensation device along a low-voltage distribution line, limiting the overvoltage of equipment such as a capacitor, a reactor, an electric control switch group, a discharging device, a protection loop and the like within the requirement of insulation level and preventing the equipment from being damaged.
The lightning arrester is arranged on the low-voltage side of the distribution transformer and has the functions of limiting overvoltage at two ends of the low-voltage winding during lightning stroke, protecting the insulation of the low-voltage winding and also protecting the high-voltage winding from damage of positive and inverse transformation overvoltage.
The 'electric equipment handover test standard of electric installation engineering' stipulates the test items of the low-voltage oxide arrester, and the test items comprise the following contents:
1) and measuring the insulation resistance of the low-voltage metal oxide arrester. Adopting a 500V megohmmeter, wherein the insulation resistance is not less than 2M omega;
2) and measuring the leakage current of the low-voltage metal oxide arrester under the direct current reference voltage and 0.75 time of the direct current reference voltage. The following specifications should be met: the metal oxide arrester corresponds to the direct current reference voltage under the direct current reference current, and should not be lower than the specified value of the existing national standard 'alternating current gapless metal oxide arrester' GB11032, and should accord with the specification of the product technical condition. The tolerance deviation should be + -5% when comparing the measured value with the measured value of the manufacturing factory; the leakage current value of 0.75 times of the DC reference voltage is not more than 50 muA or meets the specification of the technical condition of the product.
At present, the two items are respectively tested by the megger and the direct current generator, and the direct current generator adopts an alternating current 220V power supply as an input voltage, so that the direct current generator is very inconvenient to carry a generator to generate power and provide power if a low-voltage power distribution network, particularly a rural power distribution network, has power failure. At present, no low-voltage oxygen zinc lightning arrester electrical comprehensive parameter testing instrument which is supplied with power by a storage battery instead of alternating current and can simultaneously test the two test items exists in a power system. And according to relevant requirements, a test department should be equipped with a low-voltage oxide arrester test instrument to ensure that the low-voltage arrester of the governed low-voltage power grid can be effectively tested. Therefore, the instrument is specially used for testing the electrical comprehensive parameters of the low-voltage oxide arrester during handover and routine tests, and provides an effective means for judging whether the low-voltage oxide arrester can be put into operation during installation and handover and whether the low-voltage oxide arrester can continue to operate during operation.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is to the aforesaid that exists among the prior art not enough and provide an electric parameter comprehensive test instrument of low voltage distribution network oxide arrester, according to relevant requirement, the test department is equipped with low voltage oxide arrester test instrument, ensures to carry out effective test to the low voltage electric network low voltage arrester under jurisdiction, whether can drop into the operation when judging the installation handing-over of low voltage oxide arrester, whether can continue the operation in the operation provides effective means.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an electrical parameter comprehensive test instrument of an oxide arrester of a low-voltage distribution network comprises a direct-current power supply, a voltage adjusting module, an inverter, a voltage-multiplying rectifier, an isolating circuit, an acquisition module and a control module;
the output end of the direct current power supply is connected with the input end of the voltage adjusting module and the input end of the inverter, the input end of the control module is connected with the output end of the voltage adjusting module, the output end of the control module is connected with the input end of the inverter, the output end of the inverter is connected with the input end of the voltage doubling rectifier, the output end of the voltage doubling rectifier is connected with the input end of the isolating circuit, the output end of the isolating circuit is connected with the input end of the collecting module, and the collecting module is in communication connection with the control module; the direct current power supply supplies power to the voltage adjusting module and the inverter; the inverter converts the direct-current voltage output by the direct-current power supply into alternating-current voltage; the voltage-multiplying rectifier boosts and rectifies the alternating-current voltage into high direct-current voltage for output; the acquisition module acquires high direct current voltage information output by the voltage-multiplying rectifier through the isolation circuit and transmits the high direct current voltage information to the control module.
The utility model discloses the technical principle does:
the utility model discloses a direct current power supply exports 12.6V voltage, AOZ1282CI power chip is chooseed for use to the voltage control module, and this power solution is a high efficiency, lasts output current 1.2A's step-down type stabiliser, has sufficient flexibility to adapt to various application scenario. The voltage adjusting module adjusts the output voltage of the direct current power supply into 5V and 3.3V direct current voltages; the inverter comprises a push-pull type transformer electric control switch circuit; the input direct-current voltage of the push-pull type transformer electric control switch circuit is 12.6V; the output end of the push-pull type transformer electric control switch circuit is connected with the input end of the voltage-multiplying rectifier; the push-pull type transformer electric control switch circuit converts the direct current voltage output by the direct current power supply into 0-500V alternating current voltage for output; because the two electric control switch tubes alternately work, the two electric control switch power supplies are equivalent to simultaneously output power, the output power is higher, and the working efficiency is very high; the voltage-multiplying rectifier boosts and rectifies the 0-500V alternating-current voltage into 0-3000V high direct-current voltage for output; the voltage-multiplying rectifier comprises a first rectifying circuit and a second rectifying circuit; the input end of the first rectifying circuit and the input end of the second rectifying circuit are connected in parallel; the output end of the inverter is connected with the input end of the first rectifying circuit and the input end of the second rectifying circuit; the isolation circuit comprises a linear optocoupler module; the input end of the linear optocoupler module is connected with the output end of the voltage-multiplying rectifier; the output end of the linear optocoupler module is connected with the input end of the acquisition module; the output end of the linear optical coupling module is powered by the voltage adjusting module, an isolation power supply module is arranged in the linear optical coupling module, the model of the isolation power supply module is B0505S-2WR2, and the input end and the output end of the linear optical coupling module are both 5V; the acquisition module is internally provided with a reference source and an AD module; the reference source adopts a REF5025 chip, and the REF5025 chip has the characteristics of low temperature drift, high precision and low noise and provides a high-precision and high-stability power supply for the AD module; the AD module adopts an ADS1256 chip, the ADS1256 chip is a micropower, high-precision, 8-channel and 24-bit high-performance analog-to-digital converter, and 23-bit noise-free precision and the acquisition rate of the highest rate 30kSPS are provided; the ADS1256 chip is internally provided with a programmable value-added amplifier; the programmable value-added amplifier amplifies, converts and filters the electric signals collected from the isolation circuit, and the input can be flexibly configured into 4-path differential input or 8-path single-pole input; the acquisition module acquires high direct current voltage information output by the voltage-multiplying rectifier through the isolation circuit and transmits the high direct current voltage information to the control module, the control module comprises a CPU module, and the CPU module is in communication connection with the human-computer interaction module, the acquisition module and the inverter.
Compared with the prior art, the utility model discloses following beneficial effect has:
when the comprehensive electrical parameter testing instrument of the low-voltage distribution network oxide arrester is specially used for handover and routine tests of the low-voltage oxide arrester, the comprehensive electrical parameter testing instrument tests the comprehensive electrical parameters of the low-voltage distribution network oxide arrester and provides an effective means for judging whether the low-voltage oxide arrester can be put into operation during installation handover and whether the low-voltage oxide arrester can continue to operate during operation.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic circuit structure diagram of an electrical parameter comprehensive testing instrument of the oxide arrester of the low-voltage distribution network of the present invention;
fig. 2 is a schematic diagram of the electric control switch circuit of the push-pull transformer of the present invention;
fig. 3 is the schematic diagram of the voltage-doubling rectifying circuit structure of the present invention.
In the drawings: a direct current power supply 1; an inverter 2; a voltage doubler rectifier 3; a voltage regulation module 4; a control module 5; an acquisition module 6; an isolation circuit 7; a first electrically controlled switch K1; a second electrically controlled switch K2; a first coil N1; a second coil N2; a third coil N3; a first capacitance C1; a second capacitance C2; a third capacitance C3; a fourth capacitance C4; a fifth capacitance C5; a sixth capacitance C6; a seventh capacitance C7; an eighth capacitance C8; a first diode D1; a second diode D2; a third diode D3; a fourth diode D4; a fifth diode D5; a sixth diode D6; a seventh diode D7; an eighth diode D8; grounding GND; a direct current voltage Ui; an alternating voltage U0; the push-pull transformer electrically controls the switching circuit T.
Detailed Description
In order to make the utility model realize that technical means, creation characteristics, achievement purpose and effect are clearer and easily understand, it is right to combine below the figure and the detailed implementation mode the utility model discloses do further explanation:
example one
Fig. 1 is a schematic circuit structure diagram of an electrical parameter comprehensive testing instrument of an oxide arrester of a low-voltage distribution network of the present invention, as shown in fig. 1, the electrical parameter comprehensive testing instrument of the oxide arrester of the low-voltage distribution network comprises a dc power supply 1, a voltage adjusting module 4, an inverter 2, a voltage doubler rectifier 3, an isolating circuit 7, an acquisition module 6 and a control module 5;
the output end of the direct current power supply 1 is connected with the input end of the voltage adjusting module 4 and the input end of the inverter 2, the input end of the control module 5 is connected with the output end of the voltage adjusting module 4, the output end of the control module 5 is connected with the input end of the inverter 2, the output end of the inverter 2 is connected with the input end of the voltage doubling rectifier 3, the output end of the voltage doubling rectifier 3 is connected with the input end of an isolating circuit 7, the output end of the isolating circuit 7 is connected with the input end of the acquisition module 6, and the acquisition module 6 is in communication connection with the control module 5; the direct current power supply 1 supplies power to the voltage adjusting module 4 and the inverter 2; the inverter 2 converts the direct-current voltage Ui output by the direct-current power supply 1 into an alternating-current voltage U0; the voltage-multiplying rectifier 3 boosts and rectifies the alternating-current voltage U0 into a high direct-current voltage output; the acquisition module 6 acquires the high direct current voltage information output by the voltage-doubling rectifier 3 through the isolation circuit 7 and transmits the high direct current voltage information to the control module 5.
The utility model discloses the technical principle does:
the utility model discloses a 12.6V voltage of direct current power supply 1 output, AOZ1282CI power chip is chooseed for use to voltage adjustment module 4, and this power solution is a high efficiency, lasts output current 1.2A's step-down type stabiliser, has sufficient flexibility to adapt to various application scenario. The voltage adjusting module 4 adjusts the output voltage of the direct current power supply 1 into 5V and 3.3V direct current voltage Ui; the inverter 2 comprises a push-pull type transformer electric control switch circuit T; the input direct-current voltage Ui of the push-pull type transformer electric control switch circuit T is 12.6V; the output end of the push-pull type transformer electric control switch circuit T is connected with the input end of the voltage-multiplying rectifier 3; the push-pull transformer electric control switch circuit T converts the direct current voltage Ui output by the direct current power supply 1 into 0-500V alternating current voltage U0 for output; because the two electric control switch tubes work alternately in turn, the two electric control switch power supplies output power at the same time, the output power is larger, and the working efficiency is very high; the voltage-multiplying rectifier 3 boosts and rectifies the 0-500V alternating current voltage U0 into 0-3000V high direct current voltage for output; the voltage-multiplying rectifier 3 comprises a first rectifying circuit and a second rectifying circuit; the input end of the first rectifying circuit and the input end of the second rectifying circuit are connected in parallel; the output end of the inverter 2 is connected with the input end of the first rectifying circuit and the input end of the second rectifying circuit; the isolation circuit 7 comprises a linear optocoupler module; the input end of the linear optocoupler module is connected with the output end of the voltage-multiplying rectifier 3; the output end of the linear optocoupler module is connected with the input end of the acquisition module 6; the output end of the linear optical coupling module is powered by the voltage adjusting module 4, an isolation power supply module is arranged in the linear optical coupling module, the model of the isolation power supply module is B0505S-2WR2, and the input end and the output end of the linear optical coupling module are both 5V; the acquisition module 6 is internally provided with a reference source and an AD module; the reference source adopts a REF5025 chip, and the REF5025 chip has the characteristics of low temperature drift, high precision and low noise and provides a high-precision and high-stability power supply for the AD module; the AD module adopts an ADS1256 chip, the ADS1256 chip is a micropower, high-precision, 8-channel and 24-bit high-performance analog-to-digital converter, and 23-bit noise-free precision and the acquisition rate of the highest rate 30kSPS are provided; the ADS1256 chip is internally provided with a programmable value-added amplifier; the programmable value-added amplifier amplifies, converts and filters the electric signals collected from the isolation circuit 7, and the input can be flexibly configured into 4-path differential input or 8-path single-pole input; the acquisition module 6 acquires the high direct current voltage information output by the voltage-multiplying rectifier 3 through the isolation circuit 7 and transmits the high direct current voltage information to the control module 5, the control module 5 comprises a CPU module, and the CPU module is in communication connection with the human-computer interaction module, the acquisition module 6 and the inverter 2.
Compared with the prior art, the utility model discloses following beneficial effect has:
when the comprehensive electrical parameter testing instrument of the low-voltage distribution network oxide arrester is specially used for handover and routine tests of the low-voltage oxide arrester, the comprehensive electrical parameter testing instrument tests the comprehensive electrical parameters of the low-voltage distribution network oxide arrester and provides an effective means for judging whether the low-voltage oxide arrester can be put into operation during installation handover and whether the low-voltage oxide arrester can continue to operate during operation.
Example two
Fig. 2 is a schematic diagram of the structure of the push-pull transformer electric control switch circuit of the present invention, as shown in fig. 2, an electrical parameter comprehensive testing instrument for the oxide arrester of the low-voltage distribution network, wherein the inverter 2 includes a push-pull transformer electric control switch circuit T; the output end of the push-pull type transformer electric control switch circuit T is connected with the input end of the voltage-multiplying rectifier 3;
the push-pull transformer electronic control switch circuit T includes a first electronic control switch K1, a second electronic control switch K2, a first coil N1, a second coil N2, and a third coil N3; the first end of the direct current power supply 1 is connected with the second end of the first electronic control switch K1 and the first end of the second electronic control switch K2; a second terminal of the direct current power supply 1 is connected with a second terminal of the first coil N1 and a first terminal of the second coil N2; a first end of the first electrically controlled switch K1 is connected with a first end of the first coil N1; a second terminal of the second electrically controlled switch K2 is connected to a second terminal of the second coil N2; the third coil N3 is connected to the input of the voltage doubler rectifier 3.
EXAMPLE III
Fig. 3 is a schematic diagram of a voltage-doubler rectifier circuit according to the present invention, and as shown in fig. 3, the voltage-doubler rectifier 3 includes a first rectifier circuit and a second rectifier circuit;
the input end of the first rectifying circuit and the input end of the second rectifying circuit are connected in parallel;
the inverter 2 is connected with the input end of the first rectifying circuit and the input end of the second rectifying circuit.
The first rectifying circuit includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4;
a first end of the inverter 2 is connected with a first end of the first capacitor C1; a second terminal of the inverter 2 is connected to a cathode of the first diode D1 and a first terminal of the second capacitor C2; a second end of the first capacitor C1 is connected to an anode of the first diode D1, a cathode of the second diode D2, and a first end of the third capacitor C3; a second end of the second capacitor C2 is connected to an anode of the second diode D2, a cathode of the third diode D3, and a first end of a fourth capacitor C4; a second end of the third capacitor C3 is connected to an anode of the third diode D3 and a cathode of the fourth diode D4; the second end of the fourth capacitor C4 is connected to the anode of the fourth diode D4 and outputs a high dc voltage.
The second rectifying circuit comprises a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a fifth diode D5, a sixth diode D6, a seventh diode D7 and an eighth diode D8;
a first end of the inverter 2 is connected with a first end of the fifth capacitor C5; a second terminal of the inverter 2 is connected to an anode of the fifth diode D5 and a first terminal of the sixth capacitor C6; a second end of the fifth capacitor C5 is connected to a cathode of the fifth diode D5, an anode of the sixth diode D6, and a first end of the seventh capacitor C7; a second end of the sixth capacitor C6 is connected to a cathode of the sixth diode D6, an anode of the seventh diode D7, and a first end of the eighth capacitor C8; a second end of the seventh capacitor C7 is connected to the cathode of the seventh diode D7 and the anode of the eighth diode D8; a second terminal of the eighth capacitor C8 is connected to the cathode of the eighth diode D8 and to ground GND.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (10)
1. An electrical parameter comprehensive test instrument of an oxide arrester of a low-voltage distribution network is characterized by comprising a direct-current power supply (1), a voltage adjusting module (4), an inverter (2), a voltage doubling rectifier (3), an isolating circuit (7), an acquisition module (6) and a control module (5);
the output end of the direct current power supply (1) is connected with the input end of the voltage adjusting module (4) and the input end of the inverter (2), the input end of the control module (5) is connected with the output end of the voltage adjusting module (4), the output end of the control module (5) is connected with the input end of the inverter (2), the output end of the inverter (2) is connected with the input end of the voltage doubling rectifier (3), the output end of the voltage doubling rectifier (3) is connected with the input end of an isolating circuit (7), the output end of the isolating circuit (7) is connected with the input end of the acquisition module (6), and the output input end of the acquisition module (6) is connected with the input and output end of the control module (5);
the direct current power supply (1) supplies power to the voltage adjusting module (4) and the inverter (2);
the inverter (2) converts a direct-current voltage (Ui) output by the direct-current power supply (1) into an alternating-current voltage (U0);
the voltage-multiplying rectifier (3) boosts and rectifies the alternating-current voltage (U0) into a high-direct-current voltage output;
the acquisition module (6) acquires the high direct current voltage information output by the voltage doubling rectifier (3) through the isolation circuit (7) and transmits the high direct current voltage information to the control module (5).
2. An apparatus for the integrated test of the electrical parameters of oxide arresters for low-voltage distribution networks according to claim 1, characterized in that said inverter (2) comprises a push-pull transformer electrically-controlled switching circuit (T);
the output end of the push-pull type transformer electric control switch circuit (T) is connected with the input end of the voltage-multiplying rectifier (3);
the push-pull transformer electric control switch circuit (T) converts the direct current voltage (Ui) output by the direct current power supply (1) into alternating current voltage (U0).
3. The apparatus for the comprehensive test of the electrical parameters of the oxide arrester of low-voltage distribution network according to claim 2, characterized in that the push-pull transformer electrically-controlled switching circuit (T) comprises a first electrically-controlled switch (K1), a second electrically-controlled switch (K2), a first coil (N1), a second coil (N2), a third coil (N3);
the first end of the direct current power supply (1) is connected with the second end of the first electric control switch (K1) and the first end of the second electric control switch (K2); a second terminal of the direct current power supply (1) is connected with a second terminal of the first coil (N1) and a first terminal of the second coil (N2); a first end of the first electrically controlled switch (K1) is connected to a first end of the first coil (N1); a second terminal of the second electrically controlled switch (K2) is connected to a second terminal of the second coil (N2); the third coil (N3) is connected to the input of the voltage doubler rectifier (3).
4. The apparatus for the comprehensive test of the electrical parameters of the oxide arrester of the low-voltage distribution network according to claim 1, characterized in that said voltage doubler rectifier (3) comprises a first rectifying circuit and a second rectifying circuit;
the input end of the first rectifying circuit and the input end of the second rectifying circuit are connected in parallel;
the output end of the inverter (2) is connected with the input end of the first rectifying circuit and the input end of the second rectifying circuit.
5. The apparatus for comprehensive testing of electrical parameters of an oxide arrester of a low-voltage distribution network according to claim 4, wherein the first rectifying circuit comprises a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), a fourth capacitor (C4), a first diode (D1), a second diode (D2), a third diode (D3), and a fourth diode (D4);
a first terminal of the inverter (2) is connected to a first terminal of the first capacitor (C1); a second terminal of the inverter (2) is connected to a cathode of the first diode (D1), a first terminal of the second capacitor (C2); a second terminal of the first capacitor (C1) is connected to an anode of the first diode (D1), a cathode of the second diode (D2), and a first terminal of the third capacitor (C3); a second terminal of the second capacitor (C2) is connected to an anode of the second diode (D2), a cathode of a third diode (D3), and a first terminal of a fourth capacitor (C4); a second end of the third capacitor (C3) is connected with an anode of the third diode (D3) and a cathode of a fourth diode (D4); the second end of the fourth capacitor (C4) is connected with the anode of the fourth diode (D4) and outputs high direct current voltage.
6. The electrical parameter comprehensive test instrument for the oxide arrester of the low-voltage distribution network according to claim 4, characterized in that the second rectifying circuit comprises a fifth capacitor (C5), a sixth capacitor (C6), a seventh capacitor (C7), an eighth capacitor (C8), a fifth diode (D5), a sixth diode (D6), a seventh diode (D7), and an eighth diode (D8);
the first end of the inverter (2) is connected with the first end of the fifth capacitor (C5); a second terminal of the inverter (2) is connected to an anode of the fifth diode (D5) and a first terminal of the sixth capacitor (C6); a second terminal of the fifth capacitor (C5) is connected to the cathode of the fifth diode (D5), the anode of the sixth diode (D6), and the first terminal of the seventh capacitor (C7); a second terminal of the sixth capacitor (C6) is connected to the cathode of the sixth diode (D6), the anode of the seventh diode (D7), and the first terminal of the eighth capacitor (C8); a second terminal of the seventh capacitor (C7) is connected to the cathode of the seventh diode (D7) and the anode of the eighth diode (D8); a second terminal of the eighth capacitor (C8) is connected to the cathode of the eighth diode (D8) and Ground (GND).
7. An instrument for the integrated test of the electrical parameters of oxide arresters for low voltage distribution networks according to claim 1, characterised in that said isolating circuit (7) comprises a linear optocoupler module;
the input end of the linear optocoupler module is connected with the output end of the voltage-multiplying rectifier (3); and the output end of the linear optocoupler module is connected with the input end of the acquisition module (6).
8. The instrument for the comprehensive test of the electrical parameters of the oxide arrester of the low-voltage distribution network according to claim 1, characterized in that said acquisition module (6) comprises an AD module;
the input end of the AD module is connected with the output end of the isolation circuit (7);
the output end of the AD module is in communication connection with the input end of the control module (5).
9. An apparatus for the integrated test of the electrical parameters of oxide arresters for low voltage distribution networks according to claim 3, wherein said control module (5) comprises:
the system comprises a CPU module and a human-computer interaction module;
the CPU module is in communication connection with the human-computer interaction module and the acquisition module (6).
10. The apparatus for comprehensively testing the electrical parameters of the oxide arrester of the low-voltage distribution network according to claim 9, wherein the CPU module is connected with the electric control switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023333750.0U CN214669344U (en) | 2020-12-30 | 2020-12-30 | Electrical parameter comprehensive test instrument of low-voltage distribution network oxide arrester |
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| CN202023333750.0U CN214669344U (en) | 2020-12-30 | 2020-12-30 | Electrical parameter comprehensive test instrument of low-voltage distribution network oxide arrester |
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