CN113203922A - High-voltage discharge testing device and method - Google Patents
High-voltage discharge testing device and method Download PDFInfo
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- CN113203922A CN113203922A CN202110335069.XA CN202110335069A CN113203922A CN 113203922 A CN113203922 A CN 113203922A CN 202110335069 A CN202110335069 A CN 202110335069A CN 113203922 A CN113203922 A CN 113203922A
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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Abstract
The invention discloses a high-voltage discharge testing device and method, which comprises a testing box, wherein a discharging rod placing groove, a testing wire placing groove, a testing device placing groove for storing a testing clamp and a testing insertion sheet and a testing instrument placing groove for storing a testing instrument are arranged in the testing box, and a testing circuit is arranged in the testing box. The test box is internally provided with the discharge rod placing grooves, the test wire placing grooves, the test device placing grooves and the test instrument placing groove test instrument placing grooves, the test instruments are arranged in the test instrument placing grooves, the corresponding test circuits are arranged in the test box and matched with the test tools in the test box for detection, the tools in the test box are reasonably distributed, the difficulty of high-voltage discharge test of the high-voltage discharge rod is reduced, the tightness degree of the attachment of the placing grooves and the box body upper cover can be increased by arranging the buffer parts on the placing grooves, and the detection tools in the test box are prevented from scattering and being damaged when moving.
Description
Technical Field
The invention relates to the technical field of power equipment tools, in particular to a high-voltage discharge testing device and method.
Background
The high-voltage test work of the power equipment generally adopts a special discharge rod for the high-voltage test to reliably discharge and ground the tested equipment. The high-voltage discharging rod is processed by using a novel insulating material. It has the characteristics of elongation and contraction. The portable telescopic high-voltage discharge rod is convenient to use in various outdoor high-voltage tests, and particularly after a direct-current withstand voltage test is carried out, charges accumulated on a test article are discharged to the ground, so that personal safety is ensured. The telescopic high-voltage discharging rod is convenient to carry, convenient, flexible, small in size, light in weight and safe. Therefore, the storage and the preservation of the high-voltage test discharging rod are very important, the discharging rod and the grounding wire thereof need to be detected before work so as to ensure the safety of the high-voltage test work, and the taking and the use of the high-voltage discharging rod in the existing high-voltage test discharging rod testing device are complicated, so that the storage and the use of the high-voltage discharging rod are not facilitated.
For example, chinese patent CN204177878U, published 2015, 2, 25, a multifunctional special case for high-voltage test discharge rods, which comprises a case body and an upper cover, wherein the case body and the upper cover are connected by hinges, the case body is divided into at least two grid-shaped spaces, at least one of which is a grid-shaped space for placing the high-voltage test discharge rods; the latticed space in the box body is an upper long latticed space and a lower long latticed space which are formed by separating materials, wherein one long latticed space is a latticed space for placing the high-voltage test discharging rod; a sponge layer is covered on the bottom surface of the latticed space for placing the high-voltage test discharge rod, two sponge blocks which are correspondingly arranged up and down are respectively placed at two end parts of the long latticed space on the sponge layer, and a narrow clamping space for placing the two end parts of the high-voltage test discharge rod is respectively formed between the two sponge blocks at the two end parts of the long latticed space; it has the characteristics of simple structure, firmness, reliability, convenient use and the like. But it has a problem that the sponge is cracked and falls off due to long-term use.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the storage and the use of high-voltage discharge rods are influenced by the complicated taking process of the high-voltage discharge rods in the conventional high-voltage discharge testing device. A high-voltage discharge test device and method capable of rapidly completing high-voltage discharge test by using a high-voltage discharge rod are provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a high voltage discharge testing arrangement, includes the test box, be equipped with discharge rod standing groove, test wire standing groove, be used for depositing experimental device standing groove and the instrumentation standing groove that is used for depositing instrumentation that presss from both sides and experimental inserted sheet in the test box, be equipped with detection circuitry in the test box. The test box includes box and case lid, is equipped with discharging rod standing groove, test wire standing groove, test device standing groove and instrumentation standing groove in the test box promptly the box, is equipped with instrumentation in the instrumentation standing groove, and instrumentation comprises 128 x 64 display screen, button, resistance measurement circuit, and built-in 12V battery powered provides the resistance measurement of 5 group's connecting wires. The test box is internally provided with a corresponding detection circuit to be matched with a detection tool in the test box for detection, the tool in the test box is reasonably distributed, the difficulty of high-voltage discharge test of the high-voltage discharge rod is reduced, the tightness of the fit between the placing grooves and the box body upper cover can be increased by arranging buffer parts on the placing grooves, and the detection tool in the test box is prevented from being scattered and damaged when being moved.
Preferably, two discharge rods which are arranged side by side are arranged in the discharge rod placing groove, corresponding metal clamping grooves are formed in two ends of each discharge rod, and each metal clamping groove is connected with the detection instrument through a corresponding lead. Can set up many discharge rods in the discharge rod standing groove, 10kV discharge rod are placed side by side in the discharge rod standing area, and the high pressure of discharge rod and the U type metal draw-in groove of ground connection metal end card income box bottom installation simultaneously, and the direct lead wire of draw-in groove links to each other with instrumentation, can measure the size of the discharge resistance of discharge rod.
Preferably, the side wall of the test device placement groove is provided with a buffer portion for preventing the test device from scattering, and the buffer portion is made of an insulating material. Buffering portion can be settled on four lateral walls of experimental device standing groove, buffering portion can comprise insulating material such as plastics or rubber, buffering portion can be extending structure, buffering portion can include fixed part and pars contractilis, realize the isolated to experimental device when the test box is closed through setting up insulating spring between fixed part and the pars contractilis, also can correspond spacing sponge or the spacing rubber that experimental device standing groove position even was used for playing spacing effect's correspondence experimental device standing groove shape on the test box lid, it is inseparable to make experimental device standing groove and box upper cover laminating, prevent the case removal in-process, little articles such as clip scatter everywhere.
Preferably, the detection circuit comprises a control module, a prompt module, a power module and a measurement module, the power module supplies power to the control module and the measurement module respectively, the control module collects data information of the measurement module through a sampling module, and the control module gives an alarm through the prompt module. The 12V/500mAH rechargeable lithium battery is arranged in the test box, and the endurance time can reach 2-3 days. The battery power supply of the power supply module is converted into two paths of voltage, one path is an auxiliary power supply and provides a measuring power supply for the operation of components on the circuit board, and the other path generates a current-limiting constant voltage. The control module is designed by selecting a high-performance ARM controller, is externally connected with peripherals such as a liquid crystal display, a USB interface, a key and the like, simultaneously outputs a control signal, switches a measurement channel, starts an internal 12-bit analog/digital converter and measures loop resistance. The resistance measuring power supply of the measuring module adopts a constant voltage current limiting mechanism, the maximum testing current is 0.5A, the maximum output voltage is 12V, and the current sampling resistors are automatically switched, so that the resistance of 1M omega-100M omega can be measured.
Preferably, the power module includes a panel switch J3, the panel switch J3 is connected to a soft switch circuit, and the soft switch circuit includes a MOS transistor Q1, a resistor R8, an electrode capacitor E4, a resistor R9, a transistor Q2, a resistor R11, and a resistor R12. The battery voltage +12B in the power module is supplied to the circuit board through the panel switch, the MOS tube Q1, the resistor R8, the electrode capacitor E4, the resistor R9, the triode Q2, the resistor R11 and the resistor R12 form a soft switch, and when the situation that the battery voltage is too low is detected, the PWON signal is pulled high through the main controller, so that the automatic power-off effect is achieved.
Preferably, the soft switching circuit is connected to the control module and the measurement module through a voltage regulation module, and the voltage regulation module includes a first voltage regulation sub-module with a voltage regulation chip U2 and a second voltage regulation sub-module with a voltage regulation chip U3. The two voltage stabilizing modules with the voltage stabilizing chip U2 and the voltage stabilizing chip U3 respectively generate +5V and +3.3V auxiliary power supplies for components in the circuit to work.
Preferably, the sampling module comprises a voltage acquisition circuit and a current acquisition circuit, the voltage acquisition circuit and the current acquisition circuit are both connected with the serial analog-to-digital converter U16 through a differential amplifier, and the serial analog-to-digital converter U16 transmits the conversion result to the control module through the SPI serial interface. The differential amplifier is expanded, the sampled voltage and current signals are output to the serial analog-to-digital converter U16 through the differential amplifier U15 and U17, and the conversion result is transmitted to the main controller through the SPI serial interface for calculation and processing. The differential amplifiers U15 and U17 are differential operational amplifiers internally containing programmable gain amplifiers, can realize x1, x10, x100 and x1000 times of signal amplification, and can adapt to the input of signal ranges with larger span. The serial analog-to-digital converter U16 is a 24-bit 3-channel sigma-delta type analog-to-digital converter, can output high-precision conversion results under 4.17Hz to 470Hz, and is applied to circuits of various precision instruments.
Preferably, the measurement module comprises a measurement channel switching unit and a panel access unit, a plurality of test channels are arranged between the measurement channel switching unit and the panel access unit, the measurement channel switching unit comprises a plurality of relays, the measurement channel switching unit is connected with the sampling module through a current limiting circuit, and the current limiting circuit comprises a MOS transistor Q3, a resistor R22, a resistor R23, a resistor R24 and a zener diode D6. The measuring module is connected with a voltage of +12V, test channels T1-Tn of the panel access unit are respectively connected with the measuring channel switching unit through relays K2, K4, K6, K7 and K8, and a current limiting circuit consisting of an MOS tube Q3, a resistor R22, a resistor R23, a resistor R24 and a voltage stabilizing diode D6 limits output current to be within 0.5A. The relays K1, K3 and K5 switch three current sampling resistors of 1 omega, 100 omega and 10K omega to adapt to different load conditions and ensure the test precision.
A high-voltage discharge test method, any one of the above high-voltage discharge test devices, includes the following steps:
s1: starting measurement;
s2: starting power supply output;
s3: measuring channel voltage and current signals;
s4: carrying out signal processing;
s5: D/A conversion is carried out on the processed signal;
s6: calculating the resistance value of the loop;
s7: judging whether all channels are measured, if so, entering step S9, otherwise, entering step S8;
s8: switching channels, and returning to step S3;
s9: judging whether the loop resistance value exceeds the limit, if so, entering step S11, otherwise, entering step S10;
s10: displaying the loop resistance value of each channel;
s11: and performing acousto-optic prompt.
And starting up to display the main menu, and entering a key scanning program to perform scanning detection. When the menu is clicked to measure, firstly, the power supply output is started, then the channel voltage and current signals are measured, then the loop resistance values are calculated, then the channels are switched in sequence, the loop resistance value of each channel is measured, finally, the loop resistance value of each channel is displayed on a display screen and compared with the set threshold value resistance, and when the resistance value exceeds the limit, an acousto-optic prompt is sent out.
The substantial effects of the invention are as follows: the invention is characterized in that a discharge rod placing groove, a test wire placing groove, a test device placing groove and a detection instrument placing groove and detection instrument placing groove are arranged in a test box, namely a box body, a detection instrument is arranged in the detection instrument placing groove, and the detection instrument consists of a 128 x 64 display screen, keys and a resistance measurement circuit. The test box is internally provided with a corresponding detection circuit to be matched with a detection tool in the test box for detection, the tool in the test box is reasonably distributed, the difficulty of high-voltage discharge test of the high-voltage discharge rod is reduced, the tightness of the fit between the placing grooves and the box body upper cover can be increased by arranging buffer parts on the placing grooves, and the detection tool in the test box is prevented from being scattered and damaged when being moved.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
FIG. 2 is a schematic block diagram of the detection circuit of the present embodiment;
FIG. 3 is a schematic diagram of the detecting circuit of the present embodiment;
FIG. 4 is a schematic diagram illustrating a power module according to the present embodiment;
FIG. 5 is a schematic diagram illustrating the components of the sampling module according to this embodiment;
FIG. 6 is a schematic diagram illustrating the components of the measurement module according to the present embodiment;
FIG. 7 is a flowchart illustrating steps performed in this embodiment.
Wherein: 1. the testing box, 2, the standing groove of the discharging rod, 3, the standing groove of the test wire, 4, the standing groove of the testing device, 5, the standing groove of the detecting instrument, 6, the buffer part, 7, the detecting instrument, 8, the discharging rod, 9, the metal card slot, 10, the control module, 11, the power module, 12, the measuring module, 13, the prompting module, 14, the sampling module, 15, the battery charger, 16, 12V battery, 17, the auxiliary power supply, 18, the current-limiting constant voltage source, 19, the ARM controller, 20, the signal processing, 21, the relay control, 22, the buzzer, 23, the pilot lamp, 24, the LCD screen, 25, the USB interface, 26, the button, 27, the real-time clock, 28, the power-down memory, 29, the panel output terminal, 30, the switching of the measuring channel.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
The utility model provides a high voltage discharge testing arrangement, as shown in figure 1, includes test box 1, is equipped with 8 standing grooves 2 of discharging rod, test wire standing groove 3, is used for depositing experimental device standing groove 4 of experimental clamp and experimental inserted sheet and is used for depositing instrumentation standing groove 5 of instrumentation 7 in the test box 1, is equipped with detection circuitry in the test box 1. Be equipped with two discharging rod 8 of placing side by side in the 8 standing groove 2 of discharging rod, the both ends of discharging rod 8 all are equipped with corresponding metal draw-in groove 9, and every metal draw-in groove 9 all is connected with detecting instrument 7 through corresponding lead wire. Can set up many discharging rods 8 in 8 standing grooves 2 of discharging rod, 10kV discharging rod 8 is placed side by side in 8 standing areas of discharging rod, and the U type metal card groove 9 of the installation of box bottom portion is blocked into to the high pressure of discharging rod 8 and ground metal end simultaneously, and the direct lead wire of draw-in groove links to each other with detecting instrument 7, can measure the size of the discharge resistance of discharging rod 8. The side wall of the test device placement groove 4 is provided with a buffer part 6 for preventing the test device from scattering, and the buffer part 6 is made of an insulating material. Buffer 6 can be settled on four lateral walls of experimental device standing groove 4, buffer 6 can be become by insulating material such as plastics or rubber, buffer 6 can be extending structure, buffer 6 can include fixed part and pars contractilis, realize the isolated to experimental device when test box 1 is closed through setting up insulating spring between fixed part and the pars contractilis, also can correspond experimental device standing groove 4 position on 1 lid of test box and be used for playing spacing effect's spacing sponge or the spacing rubber of corresponding experimental device standing groove 4 shape even, it is inseparable to make experimental device standing groove 4 and box upper cover laminating, prevent the box removal in-process, little article such as clip scatter everywhere.
The detection circuit comprises a control module 10, a prompt module 13, a power module 11 and a measurement module 12, as shown in fig. 2, the power module 11 supplies power to the control module 10 and the measurement module 12 respectively, the control module 10 collects data information of the measurement module 12 through a sampling module 14, and the control module 10 gives an alarm through the prompt module 13. The 12V/500mAH rechargeable lithium battery is arranged in the test box 1, and the endurance time can reach 2-3 days. The battery power supply of the power module 11 is converted into two paths of voltage, one path is an auxiliary power supply and provides a measurement power supply for the components on the circuit board to work, and the other path generates a current-limiting constant voltage. As shown in fig. 3, the power module 11 includes a battery charger 15, a 12V battery 16, an auxiliary power supply 17 and a current-limiting constant voltage source 18, the control module 10 is designed to select a high-performance ARM controller 19, which is externally connected to peripherals such as a liquid crystal display 24, a USB interface 25, a key 26, a real-time clock 27 and a power-down memory 28, and meanwhile, a portion of the picture with no good relay control 21 outputs a control signal, a measurement channel between a panel output terminal 29 and a measurement channel switching 30 region is switched, and an internal 12-bit analog/digital converter is started, and data of a measured loop resistance is received through a signal processing 20 region, and then, a reminder is given through a buzzer 22 and an indicator lamp 23 in the prompt module 13.
The resistance measuring power supply of the measuring module 12 adopts a constant voltage current limiting mechanism, the maximum testing current is 0.5A, the maximum output voltage is 12V, and the current sampling resistors are automatically switched, so that the resistance of 1M omega-100M omega can be measured. The power module 11 includes a panel switch J3, as shown in fig. 4, the panel switch J3 is connected to a soft switch circuit, and the soft switch circuit includes a MOS transistor Q1, a resistor R8, an active capacitance E4, a resistor R9, a transistor Q2, a resistor R11, and a resistor R12. The battery voltage +12B in the power module 11 is supplied to the circuit board through the panel switch, the MOS tube Q1, the resistor R8, the electrode capacitor E4, the resistor R9, the triode Q2, the resistor R11 and the resistor R12 form a soft switch, and when the battery voltage is detected to be too low, the PWON signal is pulled high through the main controller, so that the automatic power-off function is achieved. The soft switching circuit is respectively connected with the control module 10 and the measuring module 12 through a voltage stabilizing module, and the voltage stabilizing module comprises a first voltage stabilizing submodule with a voltage stabilizing chip U2 and a second voltage stabilizing submodule with a voltage stabilizing chip U3. The two voltage stabilizing modules with the voltage stabilizing chip U2 and the voltage stabilizing chip U3 respectively generate +5V and +3.3V auxiliary power supplies for components in the circuit to work.
The sampling module 14 includes a voltage acquisition circuit and a current acquisition circuit, as shown in fig. 5, both the voltage acquisition circuit and the current acquisition circuit are connected to the serial analog-to-digital converter U16 through a differential amplifier, and the serial analog-to-digital converter U16 transmits the conversion result to the control module 10 through the SPI serial interface. The differential amplifier is expanded, the sampled voltage and current signals are output to the serial analog-to-digital converter U16 through the differential amplifier U15 and U17, and the conversion result is transmitted to the main controller through the SPI serial interface for calculation and processing. The differential amplifiers U15 and U17 are differential operational amplifiers internally containing programmable gain amplifiers, can realize x1, x10, x100 and x1000 times of signal amplification, and can adapt to the input of signal ranges with larger span. The serial analog-to-digital converter U16 is a 24-bit 3-channel sigma-delta type analog-to-digital converter, can output high-precision conversion results under 4.17Hz to 470Hz, and is applied to circuits of various precision instruments.
The measurement module 12 includes a measurement channel switching unit and a panel access unit, a plurality of test channels are provided between the measurement channel switching unit and the panel access unit, as shown in fig. 6, the measurement channel switching unit includes a plurality of relays, the measurement channel switching unit is connected with the sampling module 14 through a current limiting circuit, the current limiting circuit includes a MOS transistor Q3, a resistor R22, a resistor R23, a resistor R24 and a zener diode D6. The measurement module 12 is connected with +12V voltage, test channels T1-Tn of the panel access unit are respectively connected with the measurement channel switching unit through relays K2, K4, K6, K7 and K8, and a current limiting circuit consisting of an MOS tube Q3, a resistor R22, a resistor R23, a resistor R24 and a voltage stabilizing diode D6 limits output current to be within 0.5A. The relays K1, K3 and K5 switch three current sampling resistors of 1 omega, 100 omega and 10K omega to adapt to different load conditions and ensure the test precision.
A high-voltage discharge testing method, as shown in fig. 7, of any one of the above high-voltage discharge testing apparatuses, includes the following steps:
s1: starting measurement;
s2: starting power supply output;
s3: measuring channel voltage and current signals;
s4: carrying out signal processing;
s5: D/A conversion is carried out on the processed signal;
s6: calculating the resistance value of the loop;
s7: judging whether all channels are measured, if so, entering step S9, otherwise, entering step S8;
s8: switching channels, and returning to step S3;
s9: judging whether the loop resistance value exceeds the limit, if so, entering step S11, otherwise, entering step S10;
s10: displaying the loop resistance value of each channel;
s11: and performing acousto-optic prompt.
And starting up to display the main menu, and entering a key scanning program to perform scanning detection. When the menu is clicked to measure, firstly, the power supply output is started, then the channel voltage and current signals are measured, then the loop resistance values are calculated, then the channels are switched in sequence, the loop resistance value of each channel is measured, finally, the loop resistance value of each channel is displayed on a display screen and compared with the set threshold value resistance, and when the resistance value exceeds the limit, an acousto-optic prompt is sent out.
This embodiment includes box and case lid, is equipped with 8 standing grooves 2 of discharging rod, test wire standing groove 3, test device standing groove 4 and instrumentation standing groove 5 in test box 1 is the box promptly, is equipped with instrumentation 7 in instrumentation standing groove 5, and instrumentation 7 comprises 128 x 64 display screen, button, resistance measurement circuit, and built-in 12V battery powered provides 5 resistance measurements of organizing the connecting wire. Be equipped with the detection instrument in the corresponding detection circuitry cooperation test box 1 in the test box 1 and detect, instrument distribution is reasonable in the test box 1, has simplified test box 1's test procedure, has reduced the degree of difficulty that high-pressure discharge stick 8 carries out the high-pressure discharge test, can also increase the inseparable degree of standing groove and box upper cover laminating through setting up buffer 6 on each standing groove, prevents the detection instrument in the test box 1 damage of scattering when removing.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. The utility model provides a high-voltage discharge testing device, its characterized in that, includes test box (1), be equipped with discharge rod (8) standing groove (2), test wire standing groove (3), be used for depositing experimental device standing groove (4) of pressing from both sides and experimental inserted sheet and be used for depositing instrumentation standing groove (5) of instrumentation (7) in test box (1), be equipped with detection circuitry in test box (1).
2. The high-voltage discharge testing device according to claim 1, wherein two discharge rods (8) are arranged in the discharge rod (8) accommodating groove (2) side by side, two ends of each discharge rod (8) are provided with corresponding metal clamping grooves (9), and each metal clamping groove (9) is connected with the detection instrument (7) through a corresponding lead.
3. The high-voltage discharge testing device according to claim 1 or 2, wherein a buffer portion (6) for preventing the test device from scattering is provided on the side wall of the test device placing groove (4), and the buffer portion (6) is made of an insulating material.
4. The high-voltage discharge testing device according to claim 1, wherein the detection circuit comprises a control module (10), a prompt module (13), a power module (11) and a measurement module (12), the power module (11) respectively supplies power to the control module (10) and the measurement module (12), the control module (10) collects data information of the measurement module (12) through a sampling module (14), and the control module (10) gives a warning through the prompt module (13).
5. The high-voltage discharge test device according to claim 4, wherein the power module (11) comprises a panel switch J3, the panel switch J3 is connected with a soft switch circuit, and the soft switch circuit comprises a MOS transistor Q1, a resistor R8, an active capacitor E4, a resistor R9, a triode Q2, a resistor R11 and a resistor R12.
6. The high-voltage discharge testing device according to claim 5, wherein the soft switching circuit is connected to the control module (10) and the measurement module (12) through a voltage regulation module, and the voltage regulation module comprises a first voltage regulation sub-module with a voltage regulation chip U2 and a second voltage regulation sub-module with a voltage regulation chip U3.
7. A high-voltage discharge test device according to claim 4 or 5, characterized in that the sampling module (14) comprises a voltage acquisition circuit and a current acquisition circuit, the voltage acquisition circuit and the current acquisition circuit are both connected with a serial analog-to-digital converter U16 through a differential amplifier, and the serial analog-to-digital converter U16 transmits the conversion result to the control module (10) through an SPI serial interface.
8. The high-voltage discharge testing device according to claim 4 or 5, characterized in that the measuring module (12) comprises a measuring channel switching unit and a panel access unit, a plurality of testing channels are arranged between the measuring channel switching unit and the panel access unit, the measuring channel switching unit comprises a plurality of relays, the measuring channel switching unit is connected with the sampling module (14) through a current limiting circuit, and the current limiting circuit comprises a MOS tube Q3, a resistor R22, a resistor R23, a resistor R24 and a zener diode D6.
9. A high voltage discharge test method using the high voltage discharge test apparatus according to any one of claims 1 to 8, comprising the steps of:
s1: starting measurement;
s2: starting power supply output;
s3: measuring channel voltage and current signals;
s4: carrying out signal processing;
s5: D/A conversion is carried out on the processed signal;
s6: calculating the resistance value of the loop;
s7: judging whether all channels are measured, if so, entering step S9, otherwise, entering step S8;
s8: switching channels, and returning to step S3;
s9: judging whether the loop resistance value exceeds the limit, if so, entering step S11, otherwise, entering step S10;
s10: displaying the loop resistance value of each channel;
s11: and performing acousto-optic prompt.
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Cited By (1)
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| CN114113938A (en) * | 2021-11-24 | 2022-03-01 | 国网宁夏电力有限公司宁东供电公司 | Intelligent discharge monitoring method and device for high-voltage test |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114113938A (en) * | 2021-11-24 | 2022-03-01 | 国网宁夏电力有限公司宁东供电公司 | Intelligent discharge monitoring method and device for high-voltage test |
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Application publication date: 20210803 |
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