CN212989528U - Multi-branch temperature rise test device - Google Patents
Multi-branch temperature rise test device Download PDFInfo
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- CN212989528U CN212989528U CN202022187892.4U CN202022187892U CN212989528U CN 212989528 U CN212989528 U CN 212989528U CN 202022187892 U CN202022187892 U CN 202022187892U CN 212989528 U CN212989528 U CN 212989528U
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Abstract
The utility model provides a multi-branch temperature rise test device, which belongs to the technical field of electrical detection and calibration, and comprises a bus circuit, a plurality of test branches and a control system, wherein each test branch comprises a three-phase power circuit, a plurality of groups of test units, an electric quantity acquisition module and a low-voltage switch to be tested; the testing unit comprises three single-phase testing loops, each testing loop comprises a first autotransformer, an adjusting module, output points and connecting nodes, the three output points are connected to a voltage acquisition end of the electric quantity acquisition module, input ends of the three output points are electrically connected to a current acquisition end of the electric quantity acquisition module, the three connecting nodes are mutually connected to form a common point, and a signal end of the electric quantity acquisition module is electrically connected with an input end of a control system; the examination low-voltage switch electricity that awaits measuring is connected with temperature sensor, temperature sensor's signal end electric connection in control system the utility model has the advantages of effectively improve detection efficiency.
Description
Technical Field
The utility model relates to an electrical detection calibration technical field, especially a multi-branch temperature rise test device.
Background
For the temperature rise test of the multi-branch low-voltage switch, the traditional test mode is to use an adjustable reactance method for testing, the adjustable reactance is used for adjusting the test current, and the reactance adjustment range is low, the volume is large, the three-phase current is difficult to adjust and balance, the device volume is large, and the cost is high.
In view of the above, the present inventors have specially designed a multi-branch temperature rise test apparatus, and have developed this.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the technical scheme of the utility model is as follows:
a multi-branch temperature rise test device comprises a bus circuit, a plurality of test branches and a control system, wherein the test branches are electrically connected with the bus circuit and have different specification current requirements;
the test unit includes three single-phase test circuit, the test circuit includes first autotransformer, locate the regulation module of first autotransformer primary side, locate the output point of first autotransformer secondary side one end and the connected node of the other end, there is the input that two-way signal interaction is used for adjusting first autotransformer in regulation module and control system, three output point is connected in the voltage acquisition end of electric quantity collection module, the input electricity of three output point connects in the current acquisition end of electric quantity collection module, three connected node interconnect becomes common point, the signal end and the control system input electric connection of electric quantity collection module.
The low-voltage switch to be tested is electrically connected with a temperature sensor, and the signal end of the temperature sensor is electrically connected with the control system.
Preferably, the three-phase power supply circuit comprises a first-stage circuit and a plurality of second-stage circuits, the second-stage circuits correspond to the test unit, the first-stage circuits are sequentially and electrically connected with the electric quantity acquisition module and the first-stage circuit breaker along the incoming lines, and the second-stage circuits are sequentially and electrically connected with the second-stage circuit breaker and the contact ends of the alternating current contactor along the incoming lines.
Preferably, the test loop is provided with a fuse at the incoming line position of the live line.
Preferably, the primary circuit breaker, the secondary circuit breaker and the fuse belong to low-voltage switches to be tested.
Preferably, the control system comprises a PLC and a communication module for realizing interaction between the PLC and the electric quantity acquisition module.
Preferably, the first autotransformer is connected in parallel with the second autotransformer.
Preferably, the model of the electric quantity acquisition module is HC-33A.
The utility model comprises a bus circuit, a plurality of test branches and a control system, wherein the test branches are electrically connected with the bus circuit and have different specification current requirements, each test branch comprises a three-phase power circuit, a plurality of groups of test units electrically connected with the three-phase power circuit, an electric quantity acquisition module respectively arranged in each group of test units, and a low-voltage switch to be tested arranged on the three-phase power circuit and the test units, and the test units are provided with autotransformers and an adjusting module;
when the automatic voltage regulation device works, the principle of a voltage regulation method is adopted, the input of the first autotransformer is changed to regulate the current output, the output current is received by the electric quantity acquisition module to the control system, the control system receives the fed-back current and sets the regulation module according to the preset setting, and the regulation module is changed to enable the current at the input end of the first autotransformer to correspondingly change along with the current, so that the change of the output current is realized. Because the equivalent impedance of the voltage regulator method is smaller, the temperature rise test of multiple loops can be carried out, and the current change caused by the automatic temperature change of the current regulation is automatically followed by the control system, so that the detection efficiency can be effectively improved.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it.
Wherein:
FIG. 1 is a circuit diagram of the present invention;
fig. 2 is a circuit diagram of a three-phase power supply circuit of the test branch of the present invention 800A;
fig. 3 is a circuit diagram of a test unit of the test branch of the present invention 800A;
fig. 4 is a circuit diagram of the adjusting module of the present invention 800A;
fig. 5 is a circuit diagram of the control system of the present invention;
fig. 6 is a circuit diagram of the power acquisition module and the communication module of the present invention.
Description of reference numerals:
1. a test branch circuit; 11. a three-phase power supply circuit; 111. a primary circuit; 112. a secondary circuit; 12. a test unit; 121. a first autotransformer; 122. an adjusting module; 123. an output point; 124. connecting the nodes; 13. an electric quantity acquisition module; 14. a second autotransformer; 2. a control system; 21. a PLC; 22. and a communication module.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention clearer and more obvious, the following description of the present invention with reference to the accompanying drawings and embodiments is provided for further details. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Please refer to fig. 1 to 6, which are taken as a preferred embodiment of the present invention, a multi-branch temperature-rise test apparatus, including a bus, a plurality of test branches 1 electrically connected to the bus and having different specifications of current requirements, and a control system 2, where the test branch 1 includes a three-phase power circuit 11, a plurality of sets of test units 12 electrically connected to the three-phase power circuit 11, an electric quantity collecting module 13 respectively disposed in each set of test units 12, and low voltage switches to be tested disposed on the three-phase power circuit 11 and the test units 12, and specifically, the test branches 1 having the specifications of 800A, 400A, and 250A are respectively disposed, where the test branch 1 having 800A has 2 test units 12, the test branch 1 having 400A has 2 test units 12, and the test branch having 250A has 4 test units 12, and the principle is similar to that 800A is taken as an example;
the testing unit 12 comprises three single-phase testing loops, the testing loop comprises a first autotransformer 121, an adjusting module 122 arranged on the primary side of the first autotransformer 121, an output point 123 arranged on one end of the secondary side of the first autotransformer 121, and a connecting node 124 on the other end, the adjusting module 122 has bidirectional signal interaction with the control system 2 to adjust the input of the first autotransformer 121, the three output points 123 are connected to the voltage collecting end of the electric quantity collecting module 13, the input ends of the three output points 123 are electrically connected to the current collecting end of the electric quantity collecting module 13, the three connecting nodes 124 are connected to each other to form a common point, the signal end of the electric quantity collecting module 13 is electrically connected to the input end of the control system 2, the adjusting module 122 has bidirectional signal interaction with the control system 2 to adjust the input of the first autotransformer 121, specifically, the adjusting, wherein, the contact terminal (such as 3-5 of the control terminal) of the alternating current contactor controlled by the output of the control system 2 and the input terminal (such as 8-9 of the control terminal) connected with the control system 2 are provided;
the low-voltage switch to be tested is electrically connected with a temperature sensor, and the signal end of the temperature sensor is electrically connected to the control system 2.
As shown in fig. 2, the first autotransformer 121 is connected in parallel with the second autotransformer 14, and by connecting the second autotransformer 14 in parallel, on one hand, the system shutdown caused by the failure or the need of maintenance of the first autotransformer 121 can be prevented, so that the reliability of power supply is improved, and on the other hand, the number of test loops connected in parallel can be adjusted according to the number of low-voltage switches to be connected, so that the test flow is simplified.
As shown in fig. 2, the three-phase power circuit 11 includes a first-stage circuit 111 and a plurality of second-stage circuits 112, the second-stage circuits 112 correspond to the test unit 12, the first-stage circuit 111 is electrically connected with the electric quantity acquisition module 13 and the first-stage circuit breaker in sequence along the incoming line, the second-stage circuits 112 are electrically connected with the second-stage circuit breaker and the contact end of the ac contactor in sequence along the incoming line, and the coil end of the ac contactor is connected with the output end of the control system 2.
As shown in fig. 3, a fuse is disposed at the incoming position of the live wire in the testing loop, wherein the rated short-circuit open-close current of the 800A fuse is 25A, the rated short-circuit open-close current of the 400A and 250A fuses is 10A, and the first-stage circuit breaker, the second-stage circuit breaker and the fuse belong to the low-voltage switch to be tested.
As shown in fig. 5-6, the control system 2 includes a PLC21 and a communication module 22 for implementing interaction between the PLC21 and the power acquisition module 13, where the PLC21 is FX3U-128MR, the communication module 22 is FX3U-485BD and is RS485 full duplex, the digital signal adopts a differential transmission mode, which can effectively reduce interference of noise signals, and a 120 ohm resistor is connected in series between the RDA end and the RDB end of FX3U-485BD, which can protect electronic devices, the RDA is shorted to the SDA, the RDB is shorted to the SDB, and the SDA and the SDB are connected to the signal end of the power acquisition module 13.
As shown in fig. 6, the electric quantity acquisition module 13 is HC-33A, is a highly integrated product for three-phase electric quantity parameter measurement application, and can accurately measure three-phase ac voltage, three-phase current (true effective value measurement), total active power, reactive power, power factor, each single-phase power, frequency, and forward and reverse total active power.
The utility model comprises a bus circuit, a plurality of test branches 1 which are electrically connected with the bus circuit and have different specification current requirements, and a control system 2, wherein the test branches 1 comprise a three-phase power circuit 11, a plurality of groups of test units 12 which are electrically connected with the three-phase power circuit 11, an electric quantity acquisition module 13 which is respectively arranged in each group of test units 12, and low-voltage switches to be tested which are arranged on the three-phase power circuit 11 and the test units 12, and the test units 12 are provided with autotransformers and adjusting modules 122;
when the device works, the principle of a voltage regulating method is adopted, the current output is regulated by changing the input of the first autotransformer 121, the output current is received by the control system 2 through the electric quantity acquisition module 13, the control system 2 receives the fed-back current and sets the regulation module 122 according to preset setting, and the regulation module 122 is changed, so that the current at the input end of the first autotransformer 121 correspondingly changes along with the current, and the change of the output current is realized. Because the equivalent impedance of the voltage regulator method is smaller, the temperature rise test of multiple loops can be carried out, and the current change caused by the automatic temperature change of the current regulation is automatically followed by the control system 2, so that the detection efficiency can be effectively improved.
To sum up, the utility model discloses a pressure regulating method principle utilizes first autotransformer 121, adjusts module 122, electric quantity collection module 13 and PLC 21's cooperation to realize the automatically regulated of electric current in order to realize the regulation of temperature, has the advantage that effectively improves detection efficiency.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.
Claims (7)
1. A multi-branch temperature rise test device is characterized by comprising a bus circuit, a plurality of test branches (1) which are electrically connected with the bus circuit and have different specification current requirements, and a control system (2), wherein each test branch (1) comprises a three-phase power circuit (11), a plurality of groups of test units (12) which are electrically connected with the three-phase power circuit (11), an electric quantity acquisition module (13) respectively arranged in each group of test units (12), and to-be-tested low-voltage switches arranged on the three-phase power circuit (11) and the test units (12);
the test unit (12) comprises three single-phase test loops, the test loops comprise a first autotransformer (121), a regulating module (122) arranged on the primary side of the first autotransformer (121), an output point (123) arranged on one end of the secondary side of the first autotransformer (121) and a connecting node (124) on the other end, the adjusting module (122) and the control system (2) have bidirectional signal interaction for adjusting the input of the first autotransformer (121), the three output points (123) are connected with the voltage acquisition end of the electric quantity acquisition module (13), the input ends of the three output points (123) are electrically connected with the current acquisition end of the electric quantity acquisition module (13), the three connecting nodes (124) are mutually connected into a common point, the signal end of the electric quantity acquisition module (13) is electrically connected with the input end of the control system (2);
the low-voltage switch is electrically connected with a temperature sensor, and the signal end of the temperature sensor is electrically connected to the control system (2).
2. The multi-branch temperature rise test device according to claim 1, wherein the three-phase power circuit (11) comprises a first-stage circuit (111) and a plurality of second-stage circuits (112), the second-stage circuits (112) correspond to the test unit (12), the first-stage circuit (111) is electrically connected with the electric quantity acquisition module (13) and the first-stage circuit breaker along the incoming line in sequence, and the second-stage circuit (112) is electrically connected with the second-stage circuit breaker and the contact end of the alternating current contactor along the incoming line in sequence.
3. The apparatus of claim 2, wherein the testing circuit is provided with a fuse at the incoming position of the live wire.
4. The multi-branch temperature rise test device according to claim 3, wherein the primary circuit breaker, the secondary circuit breaker and the fuse belong to the low-voltage switch to be tested.
5. The multi-branch temperature rise test device according to claim 1, wherein the control system (2) comprises a PLC (21) and a communication module (22) for realizing the interaction between the PLC (21) and the power acquisition module (13).
6. The multi-branch temperature rise test device according to claim 1, wherein the first autotransformer (121) is connected in parallel with a second autotransformer (14).
7. The multi-branch temperature rise test device according to claim 1, wherein the model of the electric quantity collection module (13) is HC-33A.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022187892.4U CN212989528U (en) | 2020-09-29 | 2020-09-29 | Multi-branch temperature rise test device |
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| CN202022187892.4U CN212989528U (en) | 2020-09-29 | 2020-09-29 | Multi-branch temperature rise test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236202A (en) * | 2021-12-15 | 2022-03-25 | 锦浪科技股份有限公司 | Power grid impedance debugging system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236202A (en) * | 2021-12-15 | 2022-03-25 | 锦浪科技股份有限公司 | Power grid impedance debugging system and method |
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