CN212181002U - Newly-installed metering equipment's acceptance detection device - Google Patents
Newly-installed metering equipment's acceptance detection device Download PDFInfo
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- CN212181002U CN212181002U CN202020639186.6U CN202020639186U CN212181002U CN 212181002 U CN212181002 U CN 212181002U CN 202020639186 U CN202020639186 U CN 202020639186U CN 212181002 U CN212181002 U CN 212181002U
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Abstract
The utility model provides an acceptance detection device of newly-installed metering equipment, which comprises a test current generator, an acceptance detection switch and a comprehensive error test circuit board; the test current generator is connected with the newly-tested metering equipment through the acceptance detection switch and is used for outputting test current to the newly-tested metering equipment; and the comprehensive error test circuit board is connected with the newly-tested metering equipment and is used for detecting the reactive error of the newly-tested metering equipment. The utility model discloses a comprehensive error test circuit board detects the idle error of examining new dress metering equipment, has solved the easy problem that produces the careless omission and can not simulate real operation situation and test the inspection when user new dress metering equipment is accepted, can detect fast that new dress metering equipment has the trouble, has improved work efficiency greatly.
Description
Technical Field
The utility model relates to an electric power metering equipment check-up technical field, specific theory has related to a new installation metering equipment's acceptance detection device.
Background
According to the requirement of a power supply company, the newly installed electric energy metering device is checked within a single month after receiving the power connection notice, and the wiring correctness of the secondary circuit is checked. Because the metering equipment is not put into operation, the rear stage has no load, and no current exists in the line, the equipment such as an electric energy meter comprehensive error detector and the like cannot be used for detecting whether the line connection is correct and reliable according to a conventional method.
People also try to apply a real load on a rear-stage line to generate a test current, a three-phase four-wire 1.5 (6) A electric energy meter is generally adopted for a meter in a high-supply low-meter field metering box, a meter current loop is connected to a primary loop through a large-transformation-ratio current transformer (100: 5, 200:5 or more), the primary loop needs to generate enough current to obtain enough test current on the meter side, so that a large-capacity three-phase real load needs to be connected to the primary loop, the corresponding volume of the large-capacity real load is large, the large-capacity real load is inconvenient to carry, large heat is generated while large current is generated, resources are wasted, convenience and safety are lacked, and operability is not high.
At present, the parameters of the line equipment can only be measured and checked one by one according to a construction drawing, the working efficiency is low, careless mistakes are easy to occur, the real running condition cannot be simulated for testing and checking, and the problem existing in newly-installed metering equipment is quickly detected.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims at providing a new installation measuring equipment's inspection detection device to prior art not enough.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: an acceptance detection device of newly-installed metering equipment comprises a test current generator, an acceptance detection switch and a comprehensive error test circuit board;
the test current generator is connected with the newly-tested metering equipment through the acceptance detection switch and is used for outputting test current to the newly-tested metering equipment;
and the comprehensive error test circuit board is connected with the newly-tested metering equipment and is used for detecting the reactive error of the newly-tested metering equipment.
Based on the above, the test current generator is a three-phase four-wire self-healing low-voltage capacitor.
Based on the above, the comprehensive error test circuit board comprises a power supply module, a main CPU circuit, 3 voltage sampling circuits, 3 current sampling circuits, a metering chip, a pulse sampling circuit and a display interface circuit;
the power supply module converts 220V voltage on a voltage line into a direct current 5V working power supply to provide working voltage;
the main CPU circuit is used for completing operation;
the voltage sampling circuit is used for converting the sampled voltage into a weak current signal and transmitting the weak current signal to the metering chip;
the current sampling circuit is used for converting the sampled current into a weak current signal and transmitting the weak current signal to the metering chip;
the metering chip is communicated with the main CPU circuit and is used for completing the measurement of the electrical parameters and transmitting the electrical parameters to the main CPU circuit;
the pulse sampling circuit is used for transmitting the pulse output of the newly-installed metering equipment to be detected to the main CPU circuit after filtering and shaping to calculate a reactive error;
and the display interface circuit is connected with the main CPU circuit so as to send the electrical parameter information to the liquid crystal display screen for display.
Based on the above, the acceptance detection switch adopts the breaker switch 4P.
Based on the above, the acceptance detection device is designed as an acceptance detection device host, and comprises a case, a user side terminal row, the comprehensive error test circuit board, a liquid crystal display screen, the circuit breaker switch 4P and the three-phase four-wire self-healing low-voltage capacitor;
the user side wiring terminal row is provided with a voltage input terminal and a pulse input terminal; the voltage input terminal, the pulse input terminal, the liquid crystal display screen and the breaker switch 4P are arranged on the upper panel of the case; the comprehensive error test circuit board and the three-phase four-wire self-healing low-voltage capacitor are arranged in the case.
Based on the above, the comprehensive error test circuit board further comprises a WIFI communication interface circuit, and the WIFI communication interface circuit is connected with the main CPU circuit and used for realizing communication interconnection between the main CPU circuit and the tablet personal computer through a WIFI wireless network.
Compared with the prior art, the utility model has substantive characteristics and progress, in particular to the utility model provides an acceptance detection device of new metering equipment, which comprises a test current generator, an acceptance detection switch, a user side terminal row and a comprehensive error test circuit board; the test current generator is used for outputting a test current; the user side wiring terminal row transmits the test current to the newly-tested metering equipment; the comprehensive error test circuit board detects the reactive error of the newly-installed metering equipment to be tested, and solves the problems that careless omission is easily caused when a user newly-installed metering equipment is checked and accepted, and the real running condition cannot be simulated for test and inspection. The acceptance check can be completed only by equipment connection and parameter information input, the operation is simple and convenient, the realization is easy, the fault of newly-installed metering equipment can be quickly detected, and the working efficiency is greatly improved; and the adopted test current generator generates less heat and is simple and convenient.
Drawings
Fig. 1 is a schematic wiring diagram of the present invention.
Fig. 2 is a schematic block diagram of the present invention.
Fig. 3 is a schematic block diagram of the comprehensive error testing circuit board of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Example 1
As shown in fig. 1, the acceptance detection device of the newly-installed metering equipment comprises a test current generator, an acceptance detection switch and a comprehensive error test circuit board; the test current generator is connected with the newly-tested metering equipment through the acceptance detection switch and is used for outputting test current to the newly-tested metering equipment; and the comprehensive error test circuit board is connected with the newly-tested metering equipment and is used for detecting the reactive error of the newly-tested metering equipment.
When the device is used, after the device is connected, the acceptance detection switch is switched on the 'on' position, the test current generator is switched into the tested line to generate virtual load current of about 40-50A, and the wiring correctness of the line is checked by checking the positive reactive error of the newly-tested metering device; if the forward reactive error test is in a normal range, the active error is also correct theoretically, and the circuit is free of abnormality.
Example 2
This example differs from example 1 in that: as shown in fig. 2 and 3, the test current generator is a three-phase four-wire self-healing low-voltage capacitor. The acceptance detection switch adopts a breaker switch 4P.
Specifically, three-phase four-wire self-healing low-voltage capacitor is the important device that produces test current in this device, and the condenser has advantages such as light in weight, small, the electric current is big, do not generate heat, easy transport, safer than the real load, more is fit for using as test load at the scene. The rated voltage Ue =0.45KV of the three-phase four-wire self-healing low-voltage capacitor, the test current required to generate the primary loop is In (generally 40-60A), the test voltage Un =220V, the capacitive reactance Xc = Un/In =1/(2 pi fC), the rated capacitance C = In/(2 pi fUn) (unit: UF), and the rated capacitance F = Ue In (unit: kVar).
When the model of the breaker switch is selected, the rated current is higher than the actual test current by one grade, the actual test current is generally set to be 40-60A, and therefore the breaker switch 4P can select the rated current of 80A.
The comprehensive error test circuit board comprises a power supply module, a main CPU circuit, 3 voltage sampling circuits, 3 current sampling circuits, a metering chip, a pulse sampling circuit, a display interface circuit and a WIFI communication interface circuit; the power supply module converts 220V voltage on a voltage line into a direct current 5V working power supply; the main CPU circuit is used for completing operation; the voltage sampling circuit is used for converting voltage into weak current signals and sending the weak current signals to the metering chip; the current sampling circuit is used for converting current into weak current signals and sending the weak current signals to the metering chip; the metering chip is communicated with the main CPU circuit to complete electric parameter measurement; the pulse sampling circuit outputs the pulse of the newly-tested metering equipment, and the pulse is filtered and shaped and then is sent to the main CPU circuit to calculate errors; and the display interface circuit transmits the electrical parameter information to the liquid crystal display screen for display. Specifically, the main CPU circuit takes STM32F4 as a core, and the metrological chip adopts ADE 7878.
The utility model discloses an installation:
the acceptance detection device is designed into an acceptance detection device host and comprises a case, a user side wiring terminal row, a comprehensive error test circuit board, a liquid crystal display screen, a circuit breaker switch 4P and a three-phase four-wire self-healing low-voltage capacitor. The user-side terminal row is provided with a voltage input terminal and a pulse input terminal. The voltage input terminal, the pulse input terminal, the liquid crystal display screen and the breaker switch 4P are arranged on the upper panel of the case; the comprehensive error test circuit board and the three-phase four-wire self-healing low-voltage capacitor are arranged in the case.
(1) One end of an A, B, C, N phase voltage test line of a voltage input terminal of a user side wiring terminal row is connected into a user side power grid, the other end of the A, B, C, N phase voltage test line is connected to the input end of a 4P circuit breaker switch through a 16 square soft copper wire, and the output end of the circuit breaker switch is connected with the input ends of UA, UB, UC and UN of a reactive compensation capacitor;
(2) a voltage acquisition end, a current acquisition end and a pulse sampling end of the comprehensive error test circuit board are correspondingly provided with a voltage test line clamp, a current clamp meter and a pulse sampling test line clamp, A, B, C phase current clamp meters of the comprehensive error test circuit board are respectively clamped on three copper conductors UA, UB and UC (A-UA, B-UB and C-UC), and the wire inlet direction of the current clamp meter is correct; a, B, C, N-phase voltage test line clips of the comprehensive error test circuit board are respectively clamped on screws (A-UA, B-UB, C-UC and N-UN) of a user side connection terminal row UA, UB, UC and UN; a pulse sampling test wire clamp of the comprehensive error test circuit board is clamped on a pulse input terminal of a user side wiring terminal row, and a reactive pulse output terminal of the tested newly-installed metering equipment is connected with a pulse input terminal of the user side wiring terminal row;
(3) the circuit breaker switch 4P is arranged at a closed position, the three-phase four-wire self-healing low-voltage capacitor is switched into a tested line to generate a virtual load current of about 40-50A, and because the capacitor is a capacitive load, the power factor sin phi is approximately equal to 1, and therefore, the wiring correctness of the line can be checked by checking the reactive error of the new tested metering equipment; if the forward reactive error test is in a preset normal range, the active error is also correct theoretically, and the circuit is free of abnormity; when the forward reactive error difference is found, the voltage, the current and the phase value (which can form a vector diagram) measured by the electric energy meter comprehensive error checking instrument can be used for assisting in analyzing the fault reason, and data support is provided for checking problems for checking personnel.
Example 3
This example differs from example 2 in that: the comprehensive error test circuit board further comprises a WIFI communication interface circuit, the WIFI communication interface circuit is connected with the main CPU circuit and used for achieving communication interconnection between the main CPU circuit and the tablet personal computer through a WIFI wireless network, and specifically, the WIFI communication interface circuit adopts an HLK-RM04 wireless module. After the wiring of the host computer of the detection device and the tablet computer is finished, in order to ensure the safety of operators, the operators can select proper distance and position to carry out control operation on the tablet computer, and parameter information such as PT transformation ratio, CT transformation ratio, electric energy meter constant, electric energy meter grade and the like in the newly-installed metering equipment to be detected is input, so that the forward reactive error test can be carried out.
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 it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (6)
1. The utility model provides a newly adorn check and acceptance detection device of measurement equipment which characterized in that: the testing device comprises a testing current generator, an acceptance detection switch and a comprehensive error testing circuit board;
the test current generator is connected with the newly-tested metering equipment through the acceptance detection switch and is used for outputting test current to the newly-tested metering equipment;
and the comprehensive error test circuit board is connected with the newly-tested metering equipment and is used for detecting the reactive error of the newly-tested metering equipment.
2. An acceptance detection device of a newly-installed metering apparatus according to claim 1, wherein: the test current generator is a three-phase four-wire self-healing low-voltage capacitor.
3. Acceptance detection means for a new installation of metering equipment according to claim 2, characterised in that: the comprehensive error test circuit board comprises a power supply module, a main CPU circuit, a 3-path voltage sampling circuit, a 3-path current sampling circuit, a metering chip, a pulse sampling circuit and a display interface circuit;
the power supply module converts 220V voltage on a voltage line into a direct current 5V working power supply to provide working voltage;
the main CPU circuit is used for completing operation;
the voltage sampling circuit is used for converting the sampled voltage into a weak current signal and transmitting the weak current signal to the metering chip;
the current sampling circuit is used for converting the sampled current into a weak current signal and transmitting the weak current signal to the metering chip;
the metering chip is communicated with the main CPU circuit and is used for completing the measurement of the electrical parameters and transmitting the electrical parameters to the main CPU circuit;
the pulse sampling circuit is used for transmitting the pulse output of the newly-installed metering equipment to be detected to the main CPU circuit after filtering and shaping to calculate a reactive error;
and the display interface circuit is connected with the main CPU circuit so as to send the electrical parameter information to the liquid crystal display screen for display.
4. An acceptance detection device of a newly-installed metering apparatus according to claim 3, wherein: the acceptance detection switch adopts a breaker switch 4P.
5. An acceptance detection device of a newly-installed metering apparatus according to claim 4, wherein: the acceptance detection device is designed as an acceptance detection device host and comprises a case, a user side terminal row, the comprehensive error test circuit board, a liquid crystal display screen, the circuit breaker switch 4P and the three-phase four-wire self-healing low-voltage capacitor;
the user side wiring terminal row is provided with a voltage input terminal and a pulse input terminal; the voltage input terminal, the pulse input terminal, the liquid crystal display screen and the breaker switch 4P are arranged on the upper panel of the case; the comprehensive error test circuit board and the three-phase four-wire self-healing low-voltage capacitor are arranged in the case.
6. An acceptance detection device of a newly-installed metering apparatus according to claim 5, wherein: the comprehensive error test circuit board further comprises a WIFI communication interface circuit, and the WIFI communication interface circuit is connected with the main CPU circuit and used for realizing communication interconnection between the main CPU circuit and the tablet personal computer through a WIFI wireless network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020639186.6U CN212181002U (en) | 2020-04-24 | 2020-04-24 | Newly-installed metering equipment's acceptance detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020639186.6U CN212181002U (en) | 2020-04-24 | 2020-04-24 | Newly-installed metering equipment's acceptance detection device |
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| Publication Number | Publication Date |
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| CN212181002U true CN212181002U (en) | 2020-12-18 |
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| CN202020639186.6U Active CN212181002U (en) | 2020-04-24 | 2020-04-24 | Newly-installed metering equipment's acceptance detection device |
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