CN114910821A - AC virtual load tester for power distribution product - Google Patents
AC virtual load tester for power distribution product Download PDFInfo
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- CN114910821A CN114910821A CN202110168212.0A CN202110168212A CN114910821A CN 114910821 A CN114910821 A CN 114910821A CN 202110168212 A CN202110168212 A CN 202110168212A CN 114910821 A CN114910821 A CN 114910821A
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- 238000012360 testing method Methods 0.000 claims abstract description 31
- 238000012546 transfer Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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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
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Abstract
The invention relates to an alternating current virtual load tester for a power distribution product, which is characterized in that a testing device comprises a three-phase duplex power supply change-over switch, a virtual load, a three-phase voltmeter and ammeter, a three-phase power supply input end, a three-phase main switch, an output end for supplying power to equipment to be tested and an input end from the equipment to be tested. The three-phase power supply input end is connected with the input end of the three-phase air switch, the output end of the three-phase air switch is connected with the output end for supplying power to the equipment to be tested, the three-phase voltage and current meter and the three-phase duplex power supply change-over switch, and the three-phase duplex power supply change-over switch is connected with the input end from the equipment to be tested. The invention has reasonable design and convenient operation, greatly improves the testing efficiency and improves the standardization of testing operation by effectively integrating a plurality of testing functions. Meanwhile, the virtual load is adopted to replace the conventional load, so that the system has the characteristics of micro power consumption and high current, saves energy, and has the characteristics of small volume, higher safety and the like.
Description
Technical Field
The invention relates to a test device of a communication power distribution product, in particular to a test device of a micro-power distribution product production process, and specifically relates to an alternating current virtual load tester of a power distribution product.
Background
At present, most of testing equipment of power distribution products is in decentralized configuration, each testing equipment has single function, a plurality of people are often required to check each meter head simultaneously during testing, wiring on a testing site is disordered, potential safety hazards exist during power-on testing, testing efficiency is low, an electric furnace and the like are used as loads during testing, and the electric furnace and the like are neither standard nor unsafe, and power consumption is high. Therefore, various testing devices are urgently needed to be integrated, and an integrated power distribution product alternating current virtual load tester which is complete in function, convenient to operate, safe, power-saving, small in size and easy to move is developed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an alternating current virtual load tester for a power distribution product, which can effectively integrate various main test functions, is convenient to operate, greatly improves the test efficiency and improves the standardization of test operation.
The test principle of the invention is as follows: the tester can be used for carrying out circuit access tests on the alternating current power distribution product, including voltage tests and current tests. During testing, the output end of the power supply for the equipment to be tested supplies power to the alternating current power distribution product to be tested, the output end of the alternating current power distribution product to be tested is connected back to the input end from the equipment to be tested, and the output end of the alternating current power distribution product to be tested is connected back to the tester, so that the equipment to be tested and the tester can detect and read the current of the same loop, and the voltage and the current of each loop are compared to determine whether the voltage and the current of each loop are consistent or not, so that the circuit path of the alternating current power distribution product to be tested is tested, and whether the circuit path of the alternating current power distribution product to be tested and related devices work normally or not is verified.
The technical scheme of the invention is as follows:
the alternating current virtual load tester for the power distribution product is characterized in that the testing device comprises a three-phase duplex power supply change-over switch, a virtual load, a three-phase voltmeter and ammeter, a three-phase power supply input end, a three-phase main switch, an output end for supplying power to equipment to be tested and an input end from the equipment to be tested. The three-phase power supply input end is connected with the input end of the three-phase air switch, the output end of the three-phase air switch is connected with the output end for supplying power to the equipment to be tested, the three-phase voltage and current meter and the three-phase duplex power supply change-over switch, and the three-phase duplex power supply change-over switch is connected with the input end from the equipment to be tested.
Further, the three-phase duplex power transfer switch comprises 1 knob and 2 groups of single-pole four-throw switches (called as group I and group II), wherein common terminals of the group I and the group II are respectively connected with two ends of the virtual load. The three-phase duplex power supply change-over switch has the function that two ends of a virtual load are respectively connected to the same-phase circuit of the input three phase lines and the output three phase lines of the equipment to be tested at the same time, so that a certain phase line loop of the equipment to be tested is tested. Through the switching operation of the switch, the three phase line loops of the device to be tested are tested one by one.
Further, the virtual load is composed of an alternating current transformer and a load adjusting circuit, the alternating current transformer comprises A, B input ends of two leads and C, D output ends of the two leads, wherein the common end of the I group of the three-phase duplex power supply change-over switch is connected after A, B is in the multiple connection, the B end is connected with the N zero line, and the D end is connected with one end of the load adjusting circuit. The invention adopts a virtual load mode to realize micro-power consumption load current. The virtual load means that load current is generated in a phase line, but the current does not flow into a zero line from the phase line like a traditional load, but flows in a loop between a section of the phase line of the device to be tested and the virtual load of the tester, and the output voltage of the virtual load is only designed to be 1V, so that 20W of the alternating current generated by 20A is only required, and 4400W of the traditional 220V20A load is required.
Further, the three-phase voltage and current meter comprises 1 three-phase voltage and current meter and 3 alternating current transformers, wherein a voltage input end of the three-phase voltage and current meter is connected with an output end of the three-phase main switch, and a current input end of the three-phase voltage and current meter is connected with the 3 transformers. The three-phase voltage and current meter is used for testing and displaying the three-phase voltage and current of the equipment to be tested, comparing the three-phase voltage and current with the display value of the instrument of the equipment to be tested, and comparing whether the voltage and current of each circuit are consistent or not, so that the circuit path of the alternating current power distribution product to be tested is tested, and whether the circuit path of the alternating current power distribution product to be tested and related devices work normally or not is verified.
The invention has the beneficial effects that:
the invention has reasonable design and convenient operation, greatly improves the testing efficiency and improves the standardization of the testing operation by effectively integrating a plurality of testing functions. Meanwhile, the virtual load is adopted to replace the conventional load, so that the power supply has the characteristic of micro-power consumption and high current, not only saves energy, but also has the characteristics of small volume, higher safety and the like.
Drawings
FIG. 1 is a logic diagram of the present invention.
Fig. 2 is a schematic diagram of the application of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1 and 2, the present invention is an embodiment. FIG. 1 is a logic diagram of the present invention. Fig. 2 is a schematic diagram of the application of the present invention, and is a connection diagram for actually testing the power distribution product.
The alternating-current virtual load tester for the power distribution product comprises a three-phase duplex power supply change-over switch, a virtual load, a three-phase voltmeter/ammeter, a three-phase power supply input end, a three-phase main switch, an output end for supplying power to equipment to be tested, and an input end from the equipment to be tested. The three-phase power supply input end is connected with the input end of the three-phase air switch, the output end of the three-phase air switch is connected with the output end for supplying power to the equipment to be tested, the three-phase voltage and current meter and the three-phase duplex power supply change-over switch, and the three-phase duplex power supply change-over switch is connected with the input end from the equipment to be tested. The three-phase duplex power supply change-over switch is characterized in that the three-phase duplex power supply change-over switch is of the following types: YH 3/3; the three-phase voltmeter and ammeter has the following model: EX 8-33-I; the model of the three-phase main switch is DZ47-SLEC 10.
The virtual load is composed of an alternating current transformer and a load adjusting circuit, the alternating current transformer comprises A, B input ends of two leads and C, D output ends of the two leads, wherein the common end of the I group of the three-phase duplex power supply change-over switch is connected after A, B is in the duplex connection, the B end is connected with the N zero line, and the D end is connected with one end of the load adjusting circuit. The design parameter requirements of the alternating current transformer are 220V-1V20A, 20W, and A, C ends are homonymous ends. The virtual load refers to a load current generated in a phase line, but the current does not flow into a zero line from the phase line like a traditional load, but flows in a loop formed between a section of the phase line of a device to be tested and the virtual load of a tester, and the output voltage of the virtual load is only designed to be 1V, so that only 20W of power consumption is required for generating 20A of alternating current, and 4400W of power consumption is required for a traditional 220V20A load. The load regulation circuit may employ a cement resistor, and for 20A current generation, the loop resistance is configured to 0.05 ohms 20W.
Further, the three-phase duplex power transfer switch comprises 1 knob and 2 groups of single-pole four-throw switches (called as group I and group II), wherein common terminals of the group I and the group II are respectively connected with two ends of the virtual load. The three-phase duplex power supply change-over switch has the function that two ends of a virtual load are respectively connected to the same-phase circuit of the input three phase lines and the output three phase lines of the equipment to be tested at the same time, so that a certain phase line loop of the equipment to be tested is tested. Through the switching operation of the switch, the three phase line loops of the equipment to be tested are tested one by one.
Further, the three-phase voltage and current meter comprises 1 three-phase voltage and current meter and 3 alternating current transformers, wherein a voltage input end of the three-phase voltage and current meter is connected with an output end of the three-phase main switch, and a current input end of the three-phase voltage and current meter is connected with the 3 transformers. The three-phase voltage and current meter is used for testing and displaying the three-phase voltage and current of the equipment to be tested, comparing the three-phase voltage and current with the display value of the instrument of the equipment to be tested, and comparing whether the voltage and current of each circuit are consistent or not, so that the circuit path of the alternating current power distribution product to be tested is tested, and whether the circuit path of the alternating current power distribution product to be tested and related devices work normally or not is verified.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (5)
1. The alternating current virtual load tester for the power distribution product is characterized in that a three-phase power supply input end of the test device is connected with a three-phase air switch input end, and a three-phase air switch output end of the test device is connected with a three-phase duplex power supply change-over switch, a virtual load, a three-phase voltage and current meter, a three-phase power supply input end, a three-phase main switch, an output end for supplying power to the equipment to be tested and an input end from the equipment to be tested.
2. The output end, the three-phase voltmeter and ammeter and the three-phase duplex power supply change-over switch are connected, and the three-phase duplex power supply change-over switch is connected with the input end from the equipment to be tested.
3. The ac virtual load tester for power distribution products according to claim 1, wherein said three-phase duplex power transfer switch comprises 1 knob and 2 groups of single-pole four-throw switches (called as group I and group II), wherein the common terminals of group I and group II are connected to two ends of said virtual load respectively.
4. The ac virtual load tester for electrical distribution products of claim 1 wherein said virtual load is comprised of an ac transformer and a load regulation circuit, said ac transformer having A, B input terminals and C, D output terminals, wherein A, B is connected in series with the common terminal of group I of the three-phase duplex power transfer switch, terminal B is connected to the neutral line N, and terminal D is connected to one terminal of the load regulation circuit.
5. The ac virtual load tester for power distribution products according to claim 1, wherein said three-phase voltmeter/ammeter comprises 1 three-phase voltmeter/ammeter and 3 ac transformers, wherein a voltage input terminal of the three-phase voltmeter/ammeter is connected to an output terminal of the three-phase main switch, and a current input terminal thereof is connected to the 3 transformers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168212.0A CN114910821A (en) | 2021-02-07 | 2021-02-07 | AC virtual load tester for power distribution product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168212.0A CN114910821A (en) | 2021-02-07 | 2021-02-07 | AC virtual load tester for power distribution product |
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| Publication Number | Publication Date |
|---|---|
| CN114910821A true CN114910821A (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110168212.0A Pending CN114910821A (en) | 2021-02-07 | 2021-02-07 | AC virtual load tester for power distribution product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116400145A (en) * | 2023-01-05 | 2023-07-07 | 宁德时代新能源科技股份有限公司 | Test method, system, device and storage medium |
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| CN2938136Y (en) * | 2006-08-29 | 2007-08-22 | 宋国元 | Electric energy field detector with virtual loading |
| CN203191519U (en) * | 2013-03-21 | 2013-09-11 | 陕西飞机工业（集团）有限公司 | Device for testing alternating-current circuit breaker of aircraft |
| CN204967283U (en) * | 2015-08-10 | 2016-01-13 | 贵州大学 | Virtual load of formula alternating current -direct current can be presented to three -phase four -wire |
| CN209215570U (en) * | 2018-11-29 | 2019-08-06 | 天津铁路信号有限责任公司 | A kind of voltage current transformer test platform |
| CN111366888A (en) * | 2020-03-12 | 2020-07-03 | 宁夏隆基宁光仪表股份有限公司 | Intelligent electric energy meter field metering fault rapid detection method and detection device body |
| CN211603357U (en) * | 2019-11-29 | 2020-09-29 | 湖南福德电气有限公司 | Three-phase test load |
-
2021
- 2021-02-07 CN CN202110168212.0A patent/CN114910821A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2938136Y (en) * | 2006-08-29 | 2007-08-22 | 宋国元 | Electric energy field detector with virtual loading |
| CN203191519U (en) * | 2013-03-21 | 2013-09-11 | 陕西飞机工业（集团）有限公司 | Device for testing alternating-current circuit breaker of aircraft |
| CN204967283U (en) * | 2015-08-10 | 2016-01-13 | 贵州大学 | Virtual load of formula alternating current -direct current can be presented to three -phase four -wire |
| CN209215570U (en) * | 2018-11-29 | 2019-08-06 | 天津铁路信号有限责任公司 | A kind of voltage current transformer test platform |
| CN211603357U (en) * | 2019-11-29 | 2020-09-29 | 湖南福德电气有限公司 | Three-phase test load |
| CN111366888A (en) * | 2020-03-12 | 2020-07-03 | 宁夏隆基宁光仪表股份有限公司 | Intelligent electric energy meter field metering fault rapid detection method and detection device body |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116400145A (en) * | 2023-01-05 | 2023-07-07 | 宁德时代新能源科技股份有限公司 | Test method, system, device and storage medium |
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