A multi-station auxiliary test bench for current transformer calibration

Abstract

The present invention discloses a multi-station auxiliary test bench for current transformer calibration, which relates to the technical field of transformer detection equipment. The main purpose is to provide a multi-station auxiliary test bench that can detect multiple samples in the same batch and can quickly access or exit the measurement loop. The main technical scheme of the present invention is: a multi-station auxiliary test bench for current transformer calibration, including: a transformer calibrator, a current load box, a standard current transformer, a current booster and a detection station, a first switch is arranged between the first loop line and the first connection point, a second switch is arranged between the first power supply line and the second connection point, a first connection line is arranged between the third connection point and the first short-circuit point, two ends of the second connection line are respectively connected to the fourth connection point and the fourth switch, a third switch is arranged between the first connection line and the second connection line, and one of the first acquisition points can be connected to one of the fourth switches. The present invention is mainly used for the detection of current transformers.

Description

Technical Field

[0001] The invention relates to the technical field of transformer detection equipment, and in particular to a multi-station auxiliary test bench for current transformer verification. Background Art

[0002] A current transformer is a measuring device that converts a large current in a circuit into a small current in proportion. This conversion facilitates the measurement of current parameters. Currently, some commonly used current transformer calibration devices do not have a dedicated auxiliary test bench, and only reserve an access port for the sample to be measured in the measurement loop. Some only have a single-station auxiliary test bench, and only one unit can be installed and calibrated at a time, requiring manual wiring and removal, resulting in low calibration efficiency. This simple single-station auxiliary test bench has two main disadvantages: (1) multiple inspection stations are not designed; (2) the sample to be measured cannot be quickly connected or exited from the measurement loop according to set requirements. Traditional calibration devices are limited by the design of the auxiliary test bench, and cannot improve the degree of automated control or implement batch calibration functions for multiple units. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a multi-station auxiliary test bench for current transformer calibration, the main purpose of which is to provide a multi-station auxiliary test bench for current transformer calibration that can detect multiple samples in the same batch and can quickly connect to or exit the measurement loop.

[0004] In order to achieve the above object, the present invention mainly provides the following technical solutions:

[0005] The embodiment of the present invention provides a multi-station auxiliary test bench for current transformer verification, comprising:

[0006] A transformer tester, the transformer tester having a first input terminal, a second input terminal, a differential current input terminal and a first acquisition line, two ends of the first acquisition line are respectively connected to the differential current input terminal and the second input terminal, and the first acquisition line has a plurality of first acquisition points;

[0007] A current load box, the current load box is arranged on the first collection line;

[0008] A standard current transformer, comprising a first body, a first power supply line and a first return line, wherein the first body is connected to the first input terminal and the differential current input terminal;

[0009] a current booster connected to the first power supply line;

[0010] A detection station, wherein there are multiple detection stations, each of which includes a first switch, a second switch, a third switch, a fourth switch, a first connection point, a second connection point, a third connection point, a fourth connection point, a first connection line, a second connection line and a first short-circuit point. The first switch is arranged between the first return line and the first connection point, the second switch is arranged between the first power supply line and the second connection point, the first connection line is arranged between the third connection point and the first short-circuit point, and both ends of the second connection line are respectively connected to the fourth connection point and the fourth switch, and the third switch is arranged between the first connection line and the second connection line, and one of the first collection points can be connected to one of the fourth switches.

[0011] Furthermore, each of the detection stations further includes a third connection line and a fourth connection line, the third connection line is arranged between the first switch and the first connection point, and the fourth connection line is arranged between the second switch and the second connection point.

[0012] Furthermore, two adjacent inspection stations are a first inspection station and a second inspection station, and the fourth connecting line of the first inspection station is connected to the third connecting line of the second inspection station.

[0013] Furthermore, the transformer tester also has a first input line and a first differential current input line, the first body has a plurality of standard switches, one end of each of the standard switches is connected to the first body, and the other end is connected to the first input line, the first input line is connected to the first input end, one end of the first differential current input line is connected to the first body, and the other end is connected to the differential current input end.

[0014] Furthermore, the transformer tester also has a second input line and a second differential current input line, one end of the second differential current input line is connected to the differential current input end, and the other end is connected to the first acquisition line, one end of the second input line is connected to the second input point, and the other end is connected to the first acquisition line.

[0015] Furthermore, a control system is provided, wherein the control system is connected to each of the first switch, the second switch, the third switch, the fourth switch and the standard switch respectively.

[0016] Furthermore, the current booster has a current boost input terminal, a current boost output terminal and a voltage regulating output terminal, the voltage regulating output terminal is connected to the current boost input terminal, and the current boost output terminal is connected to the first power supply line.

[0017] Furthermore, each of the detection stations also includes a resistor, which is arranged on the first connecting line and located between the third switch and the fourth switch.

[0018] Furthermore, each of the fourth switches is a three-phase switch.

[0019] Compared with the prior art, the present invention has the following technical effects:

[0020] In the technical solution provided by the embodiment of the present invention, the function of the current transformer tester is to test and calibrate the current transformer. The current transformer tester has a first input terminal, a second input terminal, a differential current input terminal and a first acquisition line. The two ends of the first acquisition line are respectively connected to the differential current input terminal and the second input terminal, and the first acquisition line has multiple first acquisition points; the function of the current load box is to provide an effective load, and the current load box is arranged on the first acquisition line; the function of the standard current transformer is to provide a current transformer calibration standard, and the standard current transformer includes a first body, a first power supply line and a first return line, and the first body is connected to the first input terminal and the differential current input terminal; the function of the current booster is to boost the current, and the current booster is connected to the first power supply line; the function of the detection station is to detect the device under test, and there are multiple detection stations, each of which includes the first A switch, a second switch, a third switch, a fourth switch, a first connection point, a second connection point, a third connection point, a fourth connection point, a first connection line, a second connection line and a first short-circuit point, the first switch is arranged between the first return line and the first connection point, the second switch is arranged between the first power supply line and the second connection point, the first connection line is arranged between the third connection point and the first short-circuit point, the two ends of the second connection line are respectively connected to the fourth connection point and the fourth switch, the third switch is arranged between the first connection line and the second connection line, one of the first acquisition points can be connected to one of the fourth switches, compared with the prior art, there is no dedicated auxiliary test bench, only the access port of the sample to be tested is reserved in the measurement loop, and some only have a single-station auxiliary test bench, and only one can be installed and calibrated at a time, manual wiring and removal of wiring are required, and the calibration efficiency is low. This simple single-station auxiliary test bench is not designed with multiple inspection stations; the sample to be tested cannot be quickly connected or exited from the measurement loop according to the set requirements. Traditional calibration devices are limited by the design of auxiliary test benches and cannot improve the degree of automated control or realize batch calibration functions for multiple units. In the present technical solution, a first power supply line is connected to each detection station so that the first power supply line can supply power to each detection station, and then a first acquisition line is connected to each detection station so that the first acquisition line can collect information data on each detection station. Moreover, each detection station has a first connection point, a second connection point, a third connection point and a fourth connection point, so that the detection station can conveniently install the samples to be tested. It is not only convenient to install and disassemble the samples to be tested, but also multiple samples to be tested can be tested in the same batch. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a multi-station auxiliary test bench for current transformer verification provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of a first use state of a multi-station auxiliary test bench for current transformer verification provided by an embodiment of the present invention;

[0023] Figure 3 A schematic structural diagram of a second usage state of a multi-station auxiliary test bench for current transformer verification provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] like Figure 1 As shown, an embodiment of the present invention provides a multi-station auxiliary test bench for current transformer verification, comprising:

[0026] A transformer tester 1, the transformer tester 1 has a first input terminal 11, a second input terminal 12, a differential current input terminal 13 and a first acquisition line 14, two ends of the first acquisition line 14 are respectively connected to the differential current input terminal 13 and the second input terminal 12, and the first acquisition line 14 has a plurality of first acquisition points;

[0027] A current load box 2, which is arranged on the first acquisition line 14;

[0028] A standard current transformer, the standard current transformer comprises a first body 31, a first power supply line 32 and a first return line 33, the first body 31 is connected to the first input terminal 11 and the differential current input terminal 13;

[0029] A current booster 4, the current booster 4 is connected to the first power supply line 32;

[0030] There are multiple detection stations, each of which includes a first switch 51, a second switch 52, a third switch 53, a fourth switch 54, a first connection point 55, a second connection point 56, a third connection point 57, a fourth connection point 58, a first connection line, a second connection line and a first short-circuit point 50. The first switch 51 is arranged between the first return line 33 and the first connection point 55, the second switch 52 is arranged between the first power supply line 32 and the second connection point 56, the first connection line is arranged between the third connection point 57 and the first short-circuit point 50, and both ends of the second connection line are respectively connected to the fourth connection point 58 and the fourth switch 54, and the third switch 53 is arranged between the first connection line and the second connection line. One of the first collection points can be connected to one of the fourth switches 54.

[0031] In the technical solution provided by the embodiment of the present invention, the function of the transformer tester 1 is to test and calibrate the current transformer. The transformer tester 1 has a first input terminal 11, a second input terminal 12, a differential current input terminal 13 and a first acquisition line 14. The two ends of the first acquisition line 14 are respectively connected to the differential current input terminal 13 and the second input terminal 12, and the first acquisition line 14 has multiple first acquisition points; the function of the current load box 2 is to provide an effective load, and the current load box 2 is arranged on the first acquisition line 14; the function of the standard current transformer is to provide a current transformer calibration standard, and the standard current transformer includes a first body 31, a first power supply line 32 and a first return line 33, and the first body 31 is connected to the first input terminal 11 and the differential current input terminal 13; the function of the current booster 4 is to boost the current, and the current booster 4 is connected to the first power supply line 32; the function of the detection station is to detect the device under test, and there are multiple detection stations, each of which includes a first opening The switch 51, the second switch 52, the third switch 53, the fourth switch 54, the first connection point 55, the second connection point 56, the third connection point 57, the fourth connection point 58, the first connection line, the second connection line and the first short-circuit point 50, the first switch 51 is set between the first return line 33 and the first connection point 55, the second switch 52 is set between the first power supply line 32 and the second connection point 56, the first connection line is set between the third connection point 57 and the first short-circuit point 50, the two ends of the second connection line are respectively connected to the fourth connection point 58 and the fourth switch 54, the third switch 53 is set between the first connection line and the second connection line, one of the first acquisition points can be connected to one of the fourth switches 54, compared with the prior art, there is no dedicated auxiliary test bench, only the access port of the sample 9 to be tested is reserved in the measurement loop, and some only have a single-station auxiliary test bench, and only one can be installed and calibrated at a time, which requires manual wiring and removal of wiring, and the calibration efficiency is low. This simple single-station auxiliary test bench is not designed with multiple inspection stations; the sample 9 to be tested cannot be quickly connected or exited from the measurement loop according to the set requirements. The traditional calibration device is limited by the design of the auxiliary test bench and cannot improve the degree of automated control and cannot realize the function of batch calibration of multiple units. In the present technical solution, the first power supply line 32 is connected to each detection station so that the first power supply line 32 can supply power to each detection station, and then the first acquisition line 14 is connected to each detection station so that the first acquisition line 14 can collect information data on each detection station. Moreover, each detection station has a first connection point 55, a second connection point 56, a third connection point 57 and a fourth connection point 58, so that the detection station can conveniently install the sample 9 to be tested. It is not only convenient to install and disassemble the sample 9 to be tested, but also multiple samples 9 to be tested can be tested in the same batch.

[0032] The function of the above-mentioned transformer tester 1 is to test and calibrate the current transformer. The transformer tester 1 has a first input terminal 11, a second input terminal 12, a differential current input terminal 13 and a first acquisition line 14. The two ends of the first acquisition line 14 are respectively connected to the differential current input terminal 13 and the second input terminal 12. The first acquisition line 14 has multiple first acquisition points. The first acquisition point can be connected to the fourth switch 54, and the data of the tested sample 9 can be transmitted to the transformer tester 1 through the first acquisition line 14; the function of the current load box 2 is to provide an effective load, and the current load box 2 is set on the first acquisition line 14; the function of the standard current transformer is to provide a current transformer. The standard current transformer comprises a first body 31, a first power supply line 32 and a first return line 33, wherein the first body 31 is connected to the first input terminal 11 and the differential current input terminal 13; the function of the current booster 4 is to boost the current, the current booster 4 is connected to the first power supply line 32, the current booster 4 has a current boost input terminal, a current boost output terminal and a voltage regulating output terminal, the voltage regulating output terminal is connected to the current boost input terminal, and the current boost output terminal is connected to the first power supply line 32; the function of the detection station is to detect the device under test, and there are multiple detection stations, each of which comprises a first switch 51, a second switch 52, a third switch 53, a fourth switch 54, a first connection point 55, a second connection point 56, a third connection point 57, a fourth connection point 58, a first connection line, a second connection line and a first short-circuit point 50, a first switch 51 is arranged between the first return line 33 and the first connection point 55, a second switch 52 is arranged between the first power supply line 32 and the second connection point 56, the first connection line is arranged between the third connection point 57 and the first short-circuit point 50, two ends of the second connection line are respectively connected to the fourth connection point 58 and the fourth switch 54, the third switch 53 is arranged between the first connection line and the second connection line, one of the first collection points can be connected to one of the fourth switches 54, each fourth switch 54 is a three-phase switch, and each detection station also includes The third connecting line 61 and the fourth connecting line 62, the third connecting line 61 is set between the first switch 51 and the first connecting point 55, and the fourth connecting line 62 is set between the second switch 52 and the second connection. When the specifications of the tested samples 9 are the same, that is, when the rated transformation ratio, rated load, accuracy level and other parameters are consistent, the batch verification mode is adopted for verification, and 6 tested samples 9 can be connected in series at the same time, that is, there are 6 detection stations, namely the first station 81, the second station 82, the third station 83, the fourth station 84, the fifth station 85 and the sixth station 86. According to the set program, the batch verification of the 6 tested samples 9 is realized, such as Figure 2 As shown, the specific operations are as follows:

[0033] Step 1, place 6 samples 9 to be tested into 6 testing stations and connect the measurement circuits;

[0034] Step 2, setting parameters of the current transformer tester 1, the current load box 2, and the standard current transformer;

[0035] Step 3, close the first switch 811 of the first station 81 and the second switch 862 of the sixth station 86, the third switch 813 of the first station 81 is opened, the third switch 823 of the second station 82, the third switch 833 of the third station 83, the third switch 843 of the fourth station 84, the third switch 853 of the fifth station 85 and the third switch 863 of the sixth station 86 are closed, the fourth switch 814 of the first station 81 is disconnected from the first short-circuit point 810 of the first station 81, and connected to the first sampling At the collection point 151, the fourth switch 824 of the second station 82 is closed with the first short-circuit point 820 of the second station 82, the fourth switch 834 of the third station 83 is closed with the first short-circuit point 830 of the third station 83, the fourth switch 844 of the fourth station 84 is closed with the first short-circuit point 840 of the fourth station 84, the fourth switch 854 of the fifth station 85 is closed with the first short-circuit point 850 of the fifth station 85, and the fourth switch 864 of the sixth station 86 is closed with the first short-circuit point 860 of the sixth station 86;

[0036] Step 4, the current booster 4 outputs current according to the set program and increases the current to the specified value of the first measuring point, and the transformer tester 1 collects the measurement data of the first measuring point of the tested sample 9 at the first station 81;

[0037] Step 5, the third switch 813 of the first station 81 is closed, the fourth switch 814 of the first station 81 and the first short-circuit point 810 of the first station 81 are closed, the fourth switch 824 of the second station 82 and the first short-circuit point 820 of the second station 82 are disconnected and connected to the first collection point 152, the third switch 823 of the second station 82 is disconnected, and the mutual inductor tester 1 collects the measurement data of the first measurement point of the measured sample 9 of the second station 82, and so on, to complete the data collection of the first measurement point of the measured sample 9 of the 6 stations, and then restore the switch to step 3;

[0038] Step 6, the current booster 4 continues to boost the current to the current specified at the second measuring point, and then repeats steps 4 and 5 to complete data collection at all measuring points of the measured samples 9 at the six workstations;

[0039] Step 7: After the current booster 4 is lowered as required, the current booster 4 is disconnected, all first switches, second switches and standard switches 311 are disconnected, all third switches are closed, and all fourth switches are connected to the corresponding first short-circuit points.

[0040] During the calibration process, the closing control of various switches can be remotely and automatically controlled through the parameter setting of the transformer calibration device, thereby achieving the function of automatically controlling the switch. In the present technical solution, the first power supply line 32 is connected to each detection station, so that the first power supply line 32 can supply power to each detection station, and then connected to each detection station through the first acquisition line 14, so that the first acquisition line 14 can collect information data on each detection station, and each detection station has a first connection point, a second connection point, a third connection point and a fourth connection point, so that the detection station can conveniently install the sample 9 to be tested, which is not only convenient for installing and disassembling the sample 9 to be tested, but also can simultaneously test multiple samples 9 to be tested.

[0041] When the specifications of the tested samples 9 are different, that is, when one or all of the parameters such as the rated transformation ratio, rated load, and accuracy level are inconsistent, the calibration mode is adopted for calibration. Six tested samples 9 can be connected in series at the same time, that is, there are six testing stations, namely the first station 81, the second station 82, the third station 83, the fourth station 84, the fifth station 85, and the sixth station 86. According to the set program, the batch calibration of the six tested samples 9 is realized, such as Figure 3 As shown, the specific operations are as follows:

[0042] Step 1, place 6 samples 9 to be tested into 6 testing stations and connect the measurement circuits;

[0043] Step 2, setting parameters of the current transformer tester 1, the current load box 2, and the standard current transformer;

[0044] Step 3: close the first switch 811 and the second switch 812 of the first station 81, disconnect the first switch and the second switch of the second station 82 to the sixth station 86, disconnect the third switch 813 of the first station 81, close the third switch 823 of the second station 82, the third switch 833 of the third station 83, the third switch 843 of the fourth station 84, the third switch 853 of the fifth station 85 and the third switch 863 of the sixth station 86, and disconnect the fourth switch 814 of the first station 81 from the first short-circuit point 810 of the first station 81. The fourth switch 824 of the second station 82 is closed with the first short-circuit point 820 of the second station 82, the fourth switch 834 of the third station 83 is closed with the first short-circuit point 830 of the third station 83, the fourth switch 844 of the fourth station 84 is closed with the first short-circuit point 840 of the fourth station 84, the fourth switch 854 of the fifth station 85 is closed with the first short-circuit point 850 of the fifth station 85, and the fourth switch 864 of the sixth station 86 is closed with the first short-circuit point 860 of the sixth station 86;

[0045] Step 4, the current booster 4 outputs current according to the set program and increases it to the specified value of the first measuring point, the transformer tester 1 collects the measurement data of the first measuring point of the measured sample 9 at the first station 81, the current booster 4 increases the current to the specified value of the second measuring point, the transformer tester 1 collects the measurement data of the second measuring point of the measured sample 9 at the first station 81, and so on, until the measurement of all measuring points is completed, the current booster 4 is disconnected after the current booster 4 is lowered as required;

[0046] Step 5, disconnect the first switch 811 and the second switch 812 of the first station 81, close the first switch 821 and the second switch 822 of the second station 82, close the third switch 813 of the first station 81, close the fourth switch 814 of the first station 81 and the first short-circuit point 810 of the first station 81, disconnect the third switch 823 of the second station 82, disconnect the fourth switch 824 of the second station 82 and the first short-circuit point 820 of the second station 82, and connect to the first collection point 152;

[0047] Step 6, adjust the gear of the standard current transformer to the gear required by the second station 82 for the tested sample 9 as required and repeat step 4 until the tested samples 9 on all stations are measured, and the current booster 4 is disconnected after being lowered as required;

[0048] Step 7, disconnect all first switches, second switches and standard switch 311, close all third switches, and connect all fourth switches to corresponding first short-circuit points.

[0049] Through the above steps, the samples 9 of different specifications can be tested, thereby achieving the technical effect of improving the detection efficiency.

[0050] When some of the specifications of the tested samples 9 are the same while others are different, that is, when some of the parameters such as rated transformation ratio, rated load, accuracy grade, etc. are inconsistent, batch calibration is adopted for the same specifications and unit-by-unit calibration is adopted for the different specifications, that is, the mixed calibration mode.

[0051] This technical solution has made an innovative design for the measurement circuit, and has realized "batch calibration mode", "unit-by-unit calibration mode" and "mixed calibration mode" through flexible and convenient control methods, which has substantially solved the batch calibration problem of current transformers. This multi-station auxiliary test bench equipped with traditional hardware settings and software control systems can solve the batch calibration problem of current transformers and greatly improve the calibration efficiency.

[0052] Further, the two adjacent inspection stations are the first inspection station and the second inspection station, and the fourth connection line 62 of the first inspection station is connected to the third connection line 61 of the second inspection station. In this embodiment, the fourth connection line 62 of the first inspection station is connected to the third connection line 61 of the second inspection station, so that each adjacent inspection station can be connected in series, thereby achieving the technical effect of improving the inspection efficiency.

[0053] Further, the transformer tester 1 also has a first input line 15 and a first differential current input line 16, the first body 31 has a plurality of standard switches 311, one end of each standard switch 311 is connected to the first body 31, and the other end is connected to the first input line 15, the first input line 15 is connected to the first input terminal 11, one end of the first differential current input line 16 is connected to the first body 31, and the other end is connected to the differential current input terminal 13. In this embodiment, the first input line 15 and the first differential current input line 16 are added, the first body 31 has a plurality of standard switches 311, one end of each standard switch 311 is connected to the first body 31, and the other end is connected to the first input line 15, the plurality of standard switches 311 can adjust the rated transformation ratio of the standard current transformer, the first input line 15 is connected to the first input terminal 11, one end of the first differential current input line 16 is connected to the first body 31, and the other end is connected to the differential current input terminal 13, so that the transformer tester 1 can detect the data of the standard current transformer, thereby achieving the technical effect of obtaining the data of the standard current transformer.

[0054] Furthermore, the transformer tester 1 also has a second input line 17 and a second differential current input line 18, one end of the second differential current input line 18 is connected to the differential current input terminal 13, and the other end is connected to the first acquisition line 14, one end of the second input line 17 is connected to the second input terminal 12, and the other end is connected to the first acquisition line 14. In this embodiment, the second input line 17 and the second differential current input line 18 are added, one end of the second differential current input line 18 is connected to the differential current input terminal 13, and the other end is connected to the first acquisition line 14, one end of the second input line 17 is connected to the second input terminal 12, and the other end is connected to the first acquisition line 14, so that the transformer tester 1 can detect the data of each sample 9 under test transmitted by the first acquisition line 14, thereby achieving the technical effect of obtaining the data of each sample 9 under test.

[0055] Further, a control system is connected to each first switch 51, second switch 52, third switch 53, fourth switch 54 and standard switch 311. In this embodiment, a control system is added, and the control system can control each switch to achieve the technical effect of automatic control.

[0056] Furthermore, each detection station also includes a resistor 63, which is arranged on the first connection line and between the third switch 53 and the fourth switch 54. In this embodiment, the detection station is further defined, the resistor 63 is arranged on the first connection line and between the third switch 53 and the fourth switch 54, and when the third connection point 57 and the fourth connection point 58 are connected to each other, the resistor 63 can play a blocking role, thereby achieving the technical effect of protecting the circuit.

[0057] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A multi-station auxiliary test bench for current transformer verification, characterized in that: include: A transformer tester, the transformer tester having a first input terminal, a second input terminal, a differential current input terminal and a first acquisition line, two ends of the first acquisition line are respectively connected to the differential current input terminal and the second input terminal, and the first acquisition line has a plurality of first acquisition points; A current load box, the current load box is arranged on the first collection line; A standard current transformer, comprising a first body, a first power supply line and a first return line, wherein the first body is connected to the first input terminal and the differential current input terminal; a current booster connected to the first power supply line; A detection station, wherein there are multiple detection stations, each of which includes a first switch, a second switch, a third switch, a fourth switch, a first connection point, a second connection point, a third connection point, a fourth connection point, a first connection line, a second connection line and a first short-circuit point, wherein the first switch is arranged between the first return line and the first connection point, the second switch is arranged between the first power supply line and the second connection point, the first connection line is arranged between the third connection point and the first short-circuit point, and both ends of the second connection line are respectively connected to the fourth connection point and the fourth switch, the third switch is arranged between the first connection line and the second connection line, one of the first collection points can be connected to one of the fourth switches, and each of the detection stations also includes a third connection line and a fourth connection line, the third connection line is arranged between the first switch and the first connection point, the fourth connection line The transformer tester is arranged between the second switch and the second connection point, the two adjacent detection stations are the first detection station and the second detection station, the fourth connection line of the first detection station is connected to the third connection line of the second detection station, the transformer tester also has a first input line and a first differential current input line, the first body has a plurality of standard switches, one end of each of the standard switches is connected to the first body, and the other end is connected to the first input line, the first input line is connected to the first input end, one end of the first differential current input line is connected to the first body, and the other end is connected to the differential current input end, the transformer tester also has a second input line and a second differential current input line, one end of the second differential current input line is connected to the differential current input end, and the other end is connected to the first acquisition line, one end of the second input line is connected to the second input end, and the other end is connected to the first acquisition line; A control system is respectively connected to each of the first switch, the second switch, the third switch, the fourth switch and the standard switch.

2. A multi-station auxiliary test bench for current transformer verification according to claim 1, characterized in that: The current booster has a current boost input terminal, a current boost output terminal and a voltage regulating output terminal. The voltage regulating output terminal is connected to the current boost input terminal, and the current boost output terminal is connected to the first power supply line.

3. The multi-station auxiliary test bench for current transformer verification according to claim 1, characterized in that: Each of the detection stations further includes a resistor, which is arranged on the first connecting line and located between the third switch and the fourth switch.

4. The multi-station auxiliary test bench for current transformer verification according to claim 1, characterized in that: Each of the fourth switches is a three-phase switch.

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