CN210835070U - Bus duct impedance measuring device - Google Patents
Bus duct impedance measuring device Download PDFInfo
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- CN210835070U CN210835070U CN201921349616.4U CN201921349616U CN210835070U CN 210835070 U CN210835070 U CN 210835070U CN 201921349616 U CN201921349616 U CN 201921349616U CN 210835070 U CN210835070 U CN 210835070U
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Abstract
The utility model discloses a measure bus duct impedance measurement device of low pressure bus duct alternating current impedance, including current generator, the control unit, display, voltage acquisition unit, current acquisition unit and temperature acquisition unit. The three-phase current is provided for the bus duct through the current generator, the test current is provided for the bus duct, the phase-to-phase voltage, the phase current and the temperature information of the bus duct are respectively collected by the voltage collection unit, the current collection unit and the temperature collection unit and are displayed through the display, and then the resistance and the reactance of the bus duct are calculated according to the phase-to-phase voltage and the phase current. The utility model discloses convenient to use, integrated level height, measurement are quick accurate.
Description
Technical Field
The utility model relates to a bus duct electrical detection field, in particular to bus duct impedance measurement device.
Background
The low-voltage bus duct is a device for distributing and transmitting electric energy in an electric power system, and is widely applied to various engineering applications. Due to the impedance characteristics of the bus trunk system (or called a bus duct), certain voltage drop and voltage loss can be generated during normal operation and under a fault condition, the quality of electric energy at a power supply load side is influenced, meanwhile, short-circuit current and fault current of each electric installation point in the bus trunk system can be calculated for electrical designers conveniently, and bus duct manufacturers are definitely required to provide impedance values of the bus trunk system and the fault condition no matter in national standards or technical protocols of users. Therefore, the electrical characteristics of the phase conductor and the fault of the bus duct trunk system are very important indexes for measuring the performance of the bus duct, and are one of necessary projects for laboratory type tests.
The existing detection device is built according to functions by various detection instruments, the thermocouple measurement device is used for measuring the temperature of a conductor in sequence, the electric energy tester is used for measuring the current and the voltage of the conductor, and finally, temperature values, voltage values and current values are recorded manually, so that the detection device is single in function, needs to use a plurality of instruments, and is inconvenient to carry and low in efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a convenient to use, integrated level height, measure quick bus duct impedance measurement device.
The utility model provides a bus duct impedance measurement device, including current generator, the articulate of control unit, display, voltage acquisition unit, current acquisition unit and temperature acquisition unit, the control unit's output with the display is connected, the control unit's input is connected with voltage acquisition unit, current acquisition unit and temperature acquisition unit respectively, the test end of voltage acquisition unit sets up the junction at current generator and bus duct, current acquisition unit's test end adopts current transformer, current transformer sets up on the phase conductor of bus duct, the temperature acquisition unit sets up on bus duct phase conductor and shell.
Has the advantages that: the utility model discloses a bus duct impedance measuring device provides three phase current for the bus duct through current generator, for the bus duct provides test current, and voltage acquisition unit, current acquisition unit and temperature acquisition unit gather the alternate voltage, phase current and the temperature information of bus duct respectively and show through the display, calculate the resistance and the reactance of bus duct according to alternate voltage and phase current again. The utility model discloses convenient to use, integrated level height, measurement are quick accurate.
Further, the current transformer is a straight-through transformer. The straight-through mutual inductor is arranged on the bus duct conductor and can be replaced according to the sectional area of the bus duct conductor.
Further, the testing end of the voltage acquisition unit adopts an alligator chuck. Is convenient to use.
Further, the crocodile clip is respectively arranged on the A-phase conductor, the B-phase conductor and the C-phase conductor at the connection position of the current generator and the bus duct.
Furthermore, the temperature acquisition unit includes temperature sensor and signal connection line, temperature sensor pass through signal connection line with the control unit is connected, temperature sensor sets up on busway looks conductor and shell. And collecting the temperature of the corresponding position.
Further, the temperature sensor is a thermocouple temperature sensor.
Further, the control module comprises a single chip microcomputer and a peripheral circuit thereof.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples;
fig. 1 is a block diagram of a bus duct impedance measuring device according to an embodiment of the present invention;
fig. 2 is the utility model discloses bus duct impedance measurement device's connection schematic diagram.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 and 2, an automatic detection device for measuring ac impedance of a low-voltage bus duct includes a current generator 6, a control unit 2, a display 1, a voltage acquisition unit 4, a current acquisition unit 3, and a temperature acquisition unit 5. The articulate of current generator 6 and bus duct, the output of the control unit 2 with display 1 connects, the input of the control unit 2 is connected with voltage acquisition unit 4, current acquisition unit 3 and temperature acquisition unit 5 respectively, the control unit is used for obtaining the temperature and the impedance of bus duct according to the information of receiving, voltage acquisition unit 4's test end sets up the junction at current generator 6 and bus duct, current acquisition unit 3's test end adopts current transformer, current transformer sets up on the phase conductor of bus duct, temperature acquisition unit 5 is used for detecting the temperature of bus duct phase conductor and shell. The three-phase current is provided for the bus duct through the current generator 6, the test current is provided for the bus duct, the voltage acquisition unit 4, the current acquisition unit 3 and the temperature acquisition unit 5 respectively acquire phase-to-phase voltage, phase current and temperature information of the bus duct and display the phase-to-phase voltage, phase current and temperature information through the display 1, and then resistance and reactance of the bus duct are calculated according to the phase-to-phase voltage and phase current. The utility model discloses convenient to use, integrated level height, measurement are quick accurate.
In this embodiment, the current transformer is a feedthrough transformer. The straight-through mutual inductor is arranged on the bus duct conductor and can be replaced according to the sectional area of the bus duct conductor. And the testing end of the voltage acquisition unit 4 adopts an alligator chuck. The crocodile clip is convenient to use and is respectively arranged on the A-phase conductor, the B-phase conductor and the C-phase conductor at the joint of the current generator 6 and the bus duct.
In this embodiment, the temperature acquisition unit 5 includes temperature sensor and signal connection line, temperature sensor pass through signal connection line with the control unit 2 is connected, temperature sensor sets up on busway phase conductor and shell. And collecting the temperature of the corresponding position. Specifically, the temperature sensor is a thermocouple temperature sensor. A wide range of temperature changes can be measured.
Further, the control module comprises a single chip microcomputer and a peripheral circuit thereof. The collected temperature, current and voltage information can be rapidly processed.
The specific measurement process is as follows: the conductor joint of a tested bus duct 7 with the length of about 6 meters and four or five three-phase wires is connected and fixed with a current test port on a current generator 6, then all the joints of the conductors on the tested bus duct 7 are respectively screwed, and the tail end of the bus duct is in short circuit by a copper bar, so that the whole test forms a current loop and is arranged as the same as the bus duct temperature rise test. And fixing the crocodile chucks on the voltage acquisition unit 4 on the A-phase, B-phase and C-phase conductors at the connection part of the current test port and the bus duct to acquire voltage signals. The core-through current transformers of the current acquisition unit 3 are respectively arranged on the A phase, the B phase and the C phase to acquire current signals. The thermocouple sensors of the temperature acquisition unit 5 are respectively fixed on the conductor connection part and the shell of the bus system. All the acquisition units are connected with the control unit 2 through signal lines, and the length of a bus trunk system, the ambient air temperature and the test type are input into the control unit 2. After all preparation works are done, three-phase current is conducted to the bus main line system by the aid of the current generator 6, and when the current reaches the test current, the phase-to-phase voltage, the phase current, the total active power and the temperature values of all positions of the bus main line system can be checked through the display 1. When the temperature value is stable, the control unit 2 automatically calculates the average impedance per meter length, the resistance and the reactance of each phase conductor irrelevant to the temperature of the bus trunk system at the test temperature and 20 ℃. According to the same embodiment, the zero sequence impedance, the resistance sum and the temperature-independent reactance of each phase conductor per meter length of the fault loop can be measured.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. A bus duct impedance measurement device, comprising: current generator (6), control unit (2), display (1), voltage acquisition unit (4), current acquisition unit (3) and temperature acquisition unit (5), the articulate of current generator (6) and bus duct, the output of control unit (2) with display (1) is connected, the input of control unit (2) is connected with voltage acquisition unit (4), current acquisition unit (3) and temperature acquisition unit (5) respectively, the test end setting of voltage acquisition unit (4) is in the junction of current generator (6) and bus duct, current transformer is adopted to the test end of current acquisition unit (3), current transformer sets up on the phase conductor of bus duct, temperature acquisition unit (5) set up on bus duct phase conductor and shell.
2. A bus duct impedance measuring device according to claim 1, wherein: the current transformer is a straight-through transformer.
3. A bus duct impedance measuring device according to claim 1, wherein: and the testing end of the voltage acquisition unit (4) adopts an alligator chuck.
4. A bus duct impedance measuring device according to claim 3, wherein: the crocodile chuck is respectively arranged on the A-phase conductor, the B-phase conductor and the C-phase conductor at the connection part of the current generator (6) and the bus duct.
5. A bus duct impedance measuring device according to claim 1, wherein: the temperature acquisition unit (5) comprises a temperature sensor and a signal connecting wire, the temperature sensor is connected with the control unit (2) through the signal connecting wire, and the temperature sensor is arranged on the bus duct phase conductor and the shell.
6. A bus duct impedance measuring device of claim 5, characterized in that: the temperature sensor is a thermocouple temperature sensor.
7. A bus duct impedance measuring device according to claim 1, wherein: the control unit comprises a single chip microcomputer and a peripheral circuit thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921349616.4U CN210835070U (en) | 2019-08-19 | 2019-08-19 | Bus duct impedance measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921349616.4U CN210835070U (en) | 2019-08-19 | 2019-08-19 | Bus duct impedance measuring device |
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| CN210835070U true CN210835070U (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117347720A (en) * | 2023-09-27 | 2024-01-05 | 镇江加勒智慧电力科技股份有限公司 | Bus duct detection method and bus duct detection system |
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2019
- 2019-08-19 CN CN201921349616.4U patent/CN210835070U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117347720A (en) * | 2023-09-27 | 2024-01-05 | 镇江加勒智慧电力科技股份有限公司 | Bus duct detection method and bus duct detection system |
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