Testing device

Abstract

The utility model provides a testing device, and relates to the technical field of electronic circuits. The testing device comprises a closing circuit module, an opening circuit module, an energy storage circuit module, a polarity testing circuit module, a transformation ratio testing circuit module, a multifunctional testing module, a first button, a second button, a third button, a fourth button, a fifth button, a first knob and a second knob. The first button controls connection and disconnection of the closing circuit module and the switch product. The second button controls connection and disconnection of the opening circuit module and the switch product. The third button controls connection and disconnection of the energy storage circuit module and the switch product. The fourth button controls connection and disconnection of the polarity test circuit module and the switch product. The fifth button controls the connection and disconnection of the transformation ratio test circuit module and the switch product. The first knob controls the phase current type of the multifunctional test module. And the second knob controls the multifunctional test module to select phase current or zero-sequence current test. According to the invention, the performance test efficiency can be improved while the yield of switch products in the production process is guaranteed.

Description

Technical Field

[0001] The embodiments of the present application relate to, but are not limited to, the field of electronic circuit technology, and in particular to a testing device. Background Art

[0002] The production process of switch products often involves integrated performance testing, such as polarity and turns ratio, to ensure product yield. However, in practice, switch performance testing is often performed manually, or requires the use of dedicated testing equipment for each test, resulting in low testing efficiency. Therefore, improving performance testing efficiency while ensuring product yield during the switch production process is a pressing technical challenge. Utility Model Content

[0003] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims. Embodiments of the present application provide a testing device that can improve performance testing efficiency while ensuring the yield rate of switch product production.

[0004] The testing device proposed in the embodiment of the present application includes:

[0005] A test circuit group, comprising a closing circuit module, an opening circuit module, a storage circuit module, a polarity test circuit module, a ratio test circuit module, and a multi-function test module;

[0006] A control component includes a first button, a second button, a third button, a fourth button, a fifth button, a first knob and a second knob; the first button is connected to the closing circuit module, and the first button is used to control the closing circuit module and the switch product to be tested to be connected or disconnected; the second button is connected to the opening circuit module, and the second button is used to control the opening circuit module and the switch product to be tested to be connected or disconnected; the third button is connected to the energy storage circuit module, and the third button is used to control the energy storage circuit module and the switch product to be tested to be connected or disconnected; the fourth button is connected to the polarity test circuit module, and the fourth button is used to control the polarity test circuit module and the switch product to be tested to be connected or disconnected; the fifth button is connected to the ratio test circuit module, and the fifth button is used to control the ratio test circuit module and the switch product to be tested to be connected or disconnected; the first knob and the second knob are both connected to the multi-function test module, the first knob is used to control the current type of the phase current connected to the multi-function test module to perform a phase current test; the second knob is used to control the multi-function test module to perform a phase current test or a zero-sequence current test.

[0007] The above-mentioned embodiments of the present application have at least the following beneficial effects: by adding a first button, a second button, a third button, a fourth button, a fifth button, a first knob and a second knob to respectively control the closing circuit module, the opening circuit module, the energy storage circuit module, the polarity test circuit module, the ratio test circuit module and the multi-function test module, it is possible to integrate multiple different circuit test modules under one test device and realize simultaneous debugging of multiple functional items. Compared with related technologies, the embodiments of the present application can improve the performance test efficiency while ensuring the yield rate in the production process of switch products.

[0008] According to some embodiments of the present application, the test circuit group also includes a first power supply module, which is used to provide linear voltages of different proportions. The closing circuit module includes a first relay; the opening circuit module includes a second relay, the two input ends of the first power supply module are respectively connected to the live wire and the neutral wire, and the two output ends of the second power supply module are respectively connected to the first contacts of the two groups of first normally open contact groups of the first relay, and the second contacts in the first normally open contact group that correspond to the first contacts are connected to the switch product to be tested; and the two output ends of the second power supply module are also respectively connected to the first contacts of the two groups of second normally open contact groups of the second relay, and the second contacts in the second normally open contact group that correspond to the first contacts are connected to the switch product to be tested; the first end of the first button is connected to an external power supply, the second end of the first button is connected to the first contact in the first normally closed contact group of the first relay, and the second contact in the first normally closed contact group is grounded; the first end of the second button is connected to an external power supply, the second end of the second button is connected to the first contact of the second normally closed contact group of the second relay, and the second contact of the second normally closed contact group is grounded.

[0009] According to some embodiments of the present application, the energy storage circuit module includes a first power conversion module and a third relay, the two input ends of the first power conversion module are respectively connected to the live wire and the neutral wire, the two output ends of the first power conversion module are respectively connected to the first contacts of the two groups of third normally open contact groups of the third relay, and the second contact corresponding to the first contact in the third normally open contact group is connected to the switch product to be tested; the first end of the third button is connected to the external power supply, the second end of the third button is connected to the first contact of the third normally closed contact group in the third relay, and the second contact of the third normally closed contact group is grounded.

[0010] According to some embodiments of the present application, the polarity test circuit module includes a fourth relay, a second power conversion module and a first resistor, the two input ends of the second power conversion module are respectively connected to the live wire and the neutral wire, the two output ends of the second power conversion module are respectively connected to the first contacts of the two groups of fourth normally open contact groups of the fourth relay, the second contact in the fourth normally open contact group corresponding to the positive end of the second power conversion module is connected to one end of the first resistor, and the other end of the first resistor is connected to the positive power input end of the switch product to be tested; one end of the fourth button is connected to the external power supply, and the other end of the fourth button is connected to the first contact in the fourth normally closed contact group in the fourth relay, and the second contact in the fourth normally closed contact group is grounded to the first contact.

[0011] According to some embodiments of the present application, the testing device also includes a first terminal block; the input end of the first terminal block is connected to the live wire and the neutral wire, part of the output end of the first terminal block is connected to the two input ends of the first power conversion module, and part of the output end of the first terminal block is connected to the two input ends of the second power conversion module.

[0012] According to some embodiments of the present application, the transformation ratio test circuit module includes a first contactor, a voltage regulator, a current booster, a mutual inductor and a first digital meter; the first contacts of the two groups of fifth normally open contact groups of the first contactor are connected to the live wire and the neutral wire, and the second contacts corresponding to the first contacts in the two fifth normally open contact groups are respectively connected to the two input ends of the voltage regulator, the two output ends of the voltage regulator are respectively connected to the current booster, the positive end of the current booster is connected to the input end of the mutual inductor, the first digital meter is connected in parallel with the mutual inductor, and the output end of the mutual inductor and the negative output end of the current booster are connected to the switch product to be tested; the fifth button is used to control the fifth normally closed contact group of the first contactor to turn on or off the fifth normally open contact group.

[0013] According to some embodiments of the present application, two fifth buttons are provided, one end of each of the two fifth buttons is connected to an external power supply, the other end of one of the fifth buttons is connected to the first contact of the fifth normally closed contact group of the first contactor to control the closure of the two groups of the fifth normally open contact groups; the second contact corresponding to the first contact in the fifth normally closed contact group of the first contactor is grounded; the other end of the other fifth button is connected to the second contact of a group of sixth normally open contact groups of the first contactor to connect to an external power supply, and the first contact corresponding to the first contact in the sixth normally open contact group is connected to the other end of one of the fifth buttons.

[0014] According to some embodiments of the present application, the ratio test circuit module also includes two indicator lights, one end of one of the indicator lights is connected to the first contact of the sixth normally open contact group and the first contact of the fifth normally closed contact group, and the other end of one of the indicator lights is connected to an external power supply; one end of the other indicator light is connected to an external power supply, and the other end of the other indicator light is connected to the first contact of the seventh normally closed contact group of the first contactor, and the second contact of the seventh normally closed contact group is grounded.

[0015] According to some embodiments of the present application, the multifunctional test module includes a second terminal block, a fifth relay and a test instrument component, the three phase current pins of the second terminal block are respectively connected to the first contacts of the three groups of seventh normally open contact groups of the relay, the second contacts corresponding to the first contacts in the three seventh normally open contact groups are respectively connected to one end of the three first switch contact groups of the first knob, and the other ends of the three first switch contact groups of the first knob are respectively connected to the test instrument component; one end of the second switch contact group of the second knob is connected to the first contact of the sixth normally closed contact group of the fifth relay and the other end of the second switch contact group is connected to an external power supply, one end of the two third switch contact groups of the second knob is respectively connected to the zero-sequence power supply positive end and the zero-sequence power supply negative end of the second terminal block, the other end of one of the third switch contact groups is connected to the input end of the test instrument component, the output end of the test instrument component is connected to the other end of another third switch contact group and connected to the second contact in the eighth normally open contact group of the fifth relay, and the first contact corresponding to the second contact in the eighth normally open contact group is connected to the phase current common end of the second terminal block.

[0016] According to some embodiments of the present application, the test instrument element includes a second digital meter, a bidirectional pointer meter and a second contactor, the input end of the second digital meter is connected to the other end of the three first switch contact groups of the first knob and to the other end of one of the second switch contact groups, the output end of the second digital meter is connected to one end of the bidirectional pointer meter and one contact in the control contact group of the second contactor in sequence, the two contacts of the auxiliary contact group of the second contactor are respectively connected to the other end of the bidirectional pointer meter and another contact in the control contact group, the other contact of the control contact group is connected to the second contact in the eighth normally open contact group of the fifth relay, and the first contact corresponding to the second contact in the eighth normally open contact group is connected to the phase current common end of the second terminal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0018] Figure 1 This is a module diagram of an embodiment of the testing device provided by the present application;

[0019] Figure 2 1 is a circuit diagram of a closing circuit module and an opening circuit module in one embodiment of the test device provided by the present application;

[0020] Figure 3 is a circuit diagram of a tank circuit module in one embodiment of the testing device provided by the present application;

[0021] Figure 4 is a circuit diagram of a polarity test circuit module in one embodiment of the test device provided by the present application;

[0022] Figure 5 This is a schematic diagram of power supply in one embodiment of the testing device provided by the present application;

[0023] Figure 6 1 is a circuit diagram of a ratio test circuit module in one embodiment of the test device provided by the present application;

[0024] Figure 7 Schematic diagram of a circuit of a multifunctional testing module in one embodiment of the testing device provided in this application.

[0025] Reference numerals:

[0026] Closing circuit module 110, opening circuit module 120, energy storage circuit module 130, polarity test circuit module 140, ratio test circuit module 150, multi-function test module 160,

[0027] The first power module 210, the first terminal block 220, the second terminal block 230,

[0028] Switch products 300. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present application. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application. The terms "first", "second", "third", "fourth" etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order.

[0031] In addition, the described features, structures or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, well-known methods, devices, implementations or operations are not shown or described in detail to avoid blurring various aspects of the present disclosure.

[0032] Reference Figures 1 to 7 As shown, the testing device proposed in the embodiment of the present application includes:

[0033] A test circuit group, which includes a closing circuit module 110, an opening circuit module 120, a tank circuit module 130, a polarity test circuit module 140, a ratio test circuit module 150, and a multi-function test module 160;

[0034] The control component includes a first button, a second button, a third button, a fourth button, a fifth button, a first knob and a second knob; the first button is connected to the closing circuit module 110, and the first button is used to control the closing circuit module 110 and the switch product 300 to be turned on or off; the second button is connected to the opening circuit module 120, and the second button is used to control the opening circuit module 120 and the switch product 300 to be turned on or off; the third button is connected to the energy storage circuit module 130, and the third button is used to control the energy storage circuit module 130 and the switch product 300 to be turned on or off; the fourth button is connected to the opening circuit module 120, and the third button is used to control the opening circuit module 120 and the switch product 300 to be turned on or off; The polarity test circuit module 140 is connected, and the fourth button is used to control the polarity test circuit module 140 and the switch product 300 to be turned on or off; the fifth button is connected to the ratio test circuit module 150, and the fifth button is used to control the ratio test circuit module 150 and the switch product 300 to be turned on or off. The first knob and the second knob are both connected to the multi-function test module 160, and the first knob is used to control the current type of the phase current connected to the multi-function test module 160 to perform a phase current test; the second knob is used to control the multi-function test module 160 to perform a phase current test or a zero-sequence current test.

[0035] The testing device of the embodiment of the present application can be used to test pole-mounted switch products 300 that are compatible with electromagnetic, spring-operated, permanent magnetic and other operating mechanisms.

[0036] It should be noted that the closing circuit module 110, the opening circuit module 120, and the energy storage circuit module 130 can be used for malfunction testing of the mechanism. The energy storage module is used to apply a stored energy source to the product under test to enable the product to store energy. The closing circuit module 110 is used to provide a closing voltage to the switch product 300 under test, and the opening circuit module 120 is used to provide an opening voltage to the switch product 300 under test. During the mechanism anti-dancing test, the energy storage voltage is first applied to the mechanism through the energy storage circuit module 130. After the mechanism completes the energy storage action, the closing voltage is applied to the mechanism and the output is maintained. Then, the opening voltage is applied. After the mechanism opens, no other actions such as energy storage should be performed. These actions should be repeated at least once. Therefore, integrating them into a testing device can improve testing efficiency.

[0037] It should be noted that the closing circuit module 110 and the opening circuit module 120 can also be used to implement opening and closing functions at different voltages. For example: ① At 30% of the rated voltage, the mechanism is triggered to open three times, but the mechanism fails to open; ② At 65% of the rated voltage, the mechanism is triggered to open once, and the mechanism should reliably open; ③ At 85% of the rated voltage, the mechanism is triggered to close once, and the mechanism should reliably close; ④ At 100% of the rated voltage, the mechanism is triggered to close and open three times, and the mechanism should reliably close and open; ⑤ At 120% of the rated voltage, the mechanism is triggered to close and open three times, and the mechanism should reliably close and open.

[0038] It should be noted that the polarity test circuit module 140 can be used to test the direction of current between the primary winding and the secondary winding. The starting end of the primary winding of the current transformer is marked as L1, and the tail end is marked as L2; the starting end of the secondary winding is marked as K1, and the tail end is marked as K2. In wiring, L1 and K1 are called the same polarity ends, and L2 and K2 are also called the same polarity ends. During the polarity test, the negative end of the DC power supply is fixed to the output side of the switch product 300 to be tested. When the fourth button is turned on, the positive pole of the DC power supply flows back to the negative end through the switch product 300, so that a + (positive) pulse current will be generated in the primary circuit of the current transformer; observe the direction in which the secondary positive and negative pole needles "deviate". If the pointer deviates from 0 to the left, "positive start", indicating that the primary input end of the connected current transformer and the secondary output end of the current transformer connected to the positive terminal of the pointer meter are "same-name ends".

[0039] It should be noted that the ratio test circuit module 150 is used to test the ratio of the primary to secondary of a current transformer. For example, a 600 / 5 transformer will induce a 5 ampere current on its secondary side when a primary current of 600 amperes flows through it. When a primary current of 120 amperes flows through it, a 1 ampere current will be induced on its secondary side.

[0040] It should be noted that both the zero-sequence current test and the phase current test include a transformation ratio test and a polarity test (ie, realizing the functions of the transformation ratio test circuit module 150 and the polarity test circuit module 140 ).

[0041] It should be noted that the voltages connected to the closing circuit module 110, opening circuit module 120, energy storage circuit module 130, polarity test circuit module 140, and ratio test circuit module 150 all come from the neutral and live wires, providing test voltage / power to the switch product. The type of switch product 300 tested by the closing circuit module 110, opening circuit module 120, energy storage circuit module 130, polarity test circuit module 140, and ratio test circuit module 150 is different from the type of switch product 300 tested by the multi-function test module 160.

[0042] In summary, the embodiments of the present application can realize multifunctional testing while being compatible with more types of tests.

[0043] Therefore, by adding a first button, a second button, a third button, a fourth button, a fifth button, a first knob and a second knob to control the closing circuit module 110, the opening circuit module 120, the energy storage circuit module 130, the polarity test circuit module 140, the ratio test circuit module 150 and the multi-function test module 160 respectively, it is possible to integrate multiple different circuit test modules under one test device and realize simultaneous debugging of multiple functional items. Compared with related technologies, the embodiment of the present application can improve the performance test efficiency while ensuring the yield rate of the switch product 300 in the production process.

[0044] It is understandable that referring to Figure 1 and Figure 2As shown, the test circuit group also includes a first power supply module 210, which is used to provide linear voltages of different proportions. The closing circuit module 110 includes a first relay; the opening circuit module 120 includes a second relay, the two input ends of the first power supply module 210 are respectively connected to the live wire and the neutral wire, and the two output ends of the second power supply module are respectively connected to the first contacts of the two groups of first normally open contact groups of the first relay, and the second contacts of the first normally open contact group that correspond to the first contacts are connected to the switch product 300 to be tested; and the two output ends of the second power supply module are also respectively connected to the first contacts of the two groups of second normally open contact groups of the second relay, and the second contacts of the second normally open contact group that correspond to the first contacts are connected to the switch product 300 to be tested; the first end of the first button is connected to an external power supply, the second end of the first button is connected to the first contact of the first normally closed contact group of the first relay, and the second contact of the first normally closed contact group is grounded; the first end of the second button is connected to an external power supply, the second end of the second button is connected to the first contact of the second normally closed contact group of the second relay, and the second contact of the second normally closed contact group is grounded.

[0045] For example, Figure 2 As shown, the first power module 210 is DY1, the first relay is KA1, the first button is AN1, and the second button is AN2. When AN1 is pressed, the first normally closed contact group (i.e., the normally closed contact group consisting of contacts 7 and 8) is connected to the external power supply; the two groups of first normally open contact groups (4 and 6, 3 and 5) are connected. At this time, KA1 is connected to provide power to the closing coil of the tested product, starting the closing operation; when AN2 is pressed, the second normally closed contact group (i.e., contacts 7 and 8) is connected to the external power supply; the two groups of second normally open contact groups (4 and 6, 3 and 5) are connected; KA2 is connected to provide power to the opening coil of the tested product, starting the opening operation. Among them, the two first contacts of the first normally open contact group and the second normally open contact group are 4 and 3 respectively, and the two second contacts of the first normally open contact group and the second normally open contact group are 5 and 6 respectively. The first contact of the first normally closed contact group and the second normally closed contact group are both 7, and the second contact are both 8.

[0046] It is understandable that referring to Figure 3 As shown, the energy storage circuit module 130 includes a first power conversion module and a third relay, the two input ends of the first power conversion module are respectively connected to the live wire and the neutral wire, the two output ends of the first power conversion module are respectively connected to the first contacts of the two groups of third normally open contact groups of the third relay, and the second contacts corresponding to the first contacts in the third normally open contact group are connected to the switch product 300 to be tested; the first end of the third button is connected to the external power supply, the second end of the third button is connected to the first contact of the third normally closed contact group in the third relay, and the second contact of the third normally closed contact group is grounded.

[0047] For example, Figure 3As shown, the first power conversion module is DY2, the third relay is KA3, and the third button is AN3. Contacts 6 and 5 of the third relay are connected to the energy storage interface of the switch product 300. When AN3 is pressed, the third normally closed contact group (i.e., contacts 7 and 8) connects to the external power supply. The two sets of third normally open contact groups (4 and 6, 3 and 5) are connected, KA3 is turned on, providing power to the energy storage coil of the tested product and initiating the energy storage operation. The two first contacts of the third normally open contact group are 4 and 3, respectively, and the two second contacts of the third normally open contact group are 5 and 6, respectively.

[0048] It is understandable that referring to Figure 4 As shown, the polarity test circuit module 140 includes a fourth relay, a second power conversion module and a first resistor. The two input ends of the second power conversion module are respectively connected to the live wire and the neutral wire, and the two output ends of the second power conversion module are respectively connected to the first contacts of the two groups of fourth normally open contact groups of the fourth relay. The second contact in the fourth normally open contact group corresponding to the positive end of the second power conversion module is connected to one end of the first resistor, and the other end of the first resistor is connected to the positive power input end of the switch product 300 to be tested; one end of the fourth button is connected to the external power supply, and the other end of the fourth button is connected to the first contact in the fourth normally closed contact group in the fourth relay, and the second contact in the fourth normally closed contact group that is connected to the first contact is grounded.

[0049] It should be noted that the first resistors can be connected to the switch products 300 supporting different phase power supplies. The second contact of the other set of fourth normally open contacts is connected to the negative terminal of the power supply of the switch product 300 to be tested.

[0050] For example, Figure 4 As shown, the fourth relay is KA4, the second power conversion module is DY3, the first resistor is R1, and the fourth button is AN4. When AN4 is pressed, the first contact in the fourth normally closed contact group is connected to the external power supply, thereby making the two fourth normally open contact groups (4 and 6, 3 and 5) conductive, and KA4 is connected, providing a DC impulse current for the current loop of the tested product to test the polarity of the transformer. Figure 4 As shown, when the power supply of the switch product 300 to be tested is A-phase power supply, B-phase power supply, C-phase power supply and zero-sequence power supply, the test can be performed by connecting different products respectively.

[0051] It is understandable that referring to Figure 5 As shown, the testing device also includes a first terminal block 220; the input end of the first terminal block 220 is connected to the live wire and the neutral wire, part of the output end of the first terminal block 220 is connected to the two input ends of the first power conversion module, and part of the output end of the first terminal block 220 is connected to the two input ends of the second power conversion module.

[0052] It should be noted that by providing the first terminal block 220 , the polarity testing circuit module 140 and the energy storage circuit module 130 can be integrated into one piece, thereby further improving the convenience of operation.

[0053] For example, Figure 5 As shown, the first terminal block 220 is provided with 8 terminals, among which terminals 2 and 7 are connected to the first power conversion module, terminals 3 and 8 are connected to the second power conversion module. Terminals 4 and 9 are connected to the third power conversion module DY4, so as to power the display screen, indicator lights, etc. of the test device.

[0054] It is understandable that referring to Figure 6 As shown, the ratio test circuit module 150 includes a first contactor, a voltage regulator, a current booster, a mutual inductor and a first digital meter; the first contacts of the two groups of fifth normally open contact groups of the first contactor are connected to the live wire and the neutral wire, and the second contacts corresponding to the first contacts in the two fifth normally open contact groups are respectively connected to the two input ends of the voltage regulator, the two output ends of the voltage regulator are respectively connected to the current booster, the positive end of the current booster is connected to the input end of the mutual inductor, the first digital meter is connected in parallel with the mutual inductor, and the output end of the mutual inductor and the negative output end of the current booster are connected to the switch product 300 to be tested; the fifth button is used to control the fifth normally closed contact group of the first contactor to turn on or off the fifth normally open contact group.

[0055] It should be noted that the first contactor is a switching device that uses electromagnetic, pneumatic, or hydraulic principles to control the main circuit through a control circuit to achieve on-off switching. The function of the voltage regulator is to adjust the output voltage to keep it stable within a certain range. The high current generator of the current booster has the strongest load capacity and is suitable for primary bus protection and verifying the ratio of current transformers. It can also perform setting and calibration of current relays and switches. The first digital meter is an electronic measuring instrument that can be used to measure the magnitude or characteristics of various electrical signals such as voltage, current, resistance, capacitance, inductance, and frequency.

[0056] For example, Figure 6 As shown, the first contactor is JC1-1; the voltage regulator is TYQ, the current booster is SLQ, the first digital meter is M1, and the transformer is CT1. One of the two fifth normally open contact groups of the first contactor, contacts 1 and 2, are connected to the live wire and one input terminal of the voltage regulator respectively, and the other group of contacts 3 and 4 of the fifth normally open contact group are connected to the neutral wire and the other input terminal of the voltage regulator respectively; the voltage regulator, current booster, and transformer are connected in series in sequence. When it is necessary to perform a transformation ratio test on the switch product 300 based on phase A, phase B, phase C, and zero sequence, then as shown Figure 6As shown, when performing a transformation ratio test on the switch product 300 based on phase A, the A-phase input and output terminals of the switch product 300 are connected to the transformer and the negative terminal Vo2 of the current booster, respectively. When performing a transformation ratio test on the switch product 300 based on phase B, the B-phase input and output terminals of the switch product 300 are connected to the transformer and the negative terminal Vo2 of the current booster, respectively. When performing a transformation ratio test on the switch product 300 based on phase C, the C-phase input and output terminals of the switch product 300 are connected to the transformer and the negative terminal Vo2 of the current booster, respectively. When performing a zero-sequence transformation ratio test on the switch product 300, the C-phase input and output terminals of the switch product 300 are connected to the transformer and the negative terminal Vo2 of the current booster, respectively.

[0057] It is understandable that referring to Figure 6 As shown, two fifth buttons are provided, one end of each of the two fifth buttons is connected to an external power supply, the other end of one of the fifth buttons is connected to the first contact of the fifth normally closed contact group of the first contactor to control the closure of the two groups of fifth normally open contact groups; the second contact corresponding to the first contact in the fifth normally closed contact group of the first contactor is grounded; the other end of the other fifth button is connected to the second contact of a group of sixth normally open contact groups of the first contactor to connect to the external power supply, and the first contact corresponding to the first contact in the sixth normally open contact group is connected to the other end of one of the fifth buttons.

[0058] For example, Figure 6 As shown, the two fifth buttons are AN5 and AN6. When AN5 is pressed, current flows through the fifth normally closed contact group (A1 and A2), closing the two fifth normally open contact groups (1 and 2, 3 and 4) and the sixth normally open contact group (53 and 54), thereby supplying current to the switch product 300. When AN6 is pressed, the sixth normally open contact group (53 and 54) grounds both ends of the fifth normally closed contact group, thereby opening all normally open contact groups. In this case, by providing two fifth buttons for high current control, operational safety can be improved.

[0059] It is understandable that referring to Figure 6 As shown, the ratio test circuit module 150 also includes two indicator lights, one end of one indicator light is connected to the first contact of the sixth normally open contact group and the first contact of the fifth normally closed contact group, and the other end of one indicator light is connected to an external power supply; one end of the other indicator light is connected to the external power supply, and the other end of the other indicator light is connected to the first contact of the seventh normally closed contact group of the first contactor, and the second contact of the seventh normally closed contact group is grounded.

[0060] It should be noted that by adding two indicator lights, it is possible to determine whether the two fifth buttons are pressed, that is, whether the button that provides power to the fifth normally closed contact group is pressed, thereby further improving operational safety. Figure 6 As shown, the seventh normally closed contact group is a contact group consisting of contacts 61 and 62.

[0061] For example, Figure 6 As shown, when AN6 is pressed and AN5 is disconnected, the indicator light corresponding to AN6 is green and the indicator light corresponding to AN5 is red.

[0062] It is understandable that referring to Figure 7 As shown, the multi-function test module 160 includes a second terminal block 230, a fifth relay and a test instrument component. The three phase current pins of the second terminal block 230 are respectively connected to the first contacts of the three groups of seventh normally open contact groups of the relay, and the second contacts corresponding to the first contacts in the three seventh normally open contact groups are respectively connected to one end of the three first switch contact groups of the first knob, and the other ends of the three first switch contact groups of the first knob are respectively connected to the test instrument component; one end of the second switch contact group of the second knob is connected to the first contact of the sixth normally closed contact group of the fifth relay and the other end of the second switch contact group is connected to the external power supply, one end of the two third switch contact groups of the second knob is respectively connected to the zero-sequence power supply positive terminal and the zero-sequence power supply negative terminal of the second terminal block 230, the other end of one of the third switch contact groups is connected to the input end of the test instrument component, the output end of the test instrument component is connected to the other end of the other third switch contact group and connected to the second contact in the eighth normally open contact group of the fifth relay, and the first contact corresponding to the second contact in the eighth normally open contact group is connected to the phase current common end of the second terminal block 230.

[0063] For example, Figure 7 As shown, the second terminal block 230 is XT2; the fifth relay is KA5, the first knob is XN1, and the second knob is XN2. The three first switch contact groups of XN1 (9 and 10, 5 and 6, and 1 and 2) can achieve three different gear positions, the second switch contact group of XN2 (9 and 10) can achieve a single gear position, and the third switch contact group of XN2 (1 and 2, 3 and 4) can achieve a single gear position. In other embodiments, XN2 is also provided with a neutral position. Thus, there are three gear positions for XN1, as follows:

[0064] (1) When the first gear is engaged, 1-2 and 3-4 are connected, and the C phase is selected to test the current ratio or transformer polarity.

[0065] (2) When the second gear is engaged, 5-6 and 7-8 are connected, and the B phase is selected to test the current ratio or transformer polarity.

[0066] (3) When the third gear is engaged, 9-10 and 11-12 are connected, and phase A is selected to test the current ratio or transformer polarity.

[0067] Similarly, there are three gears for XN2, as follows:

[0068] (1) When the third gear is engaged, 1-2 is on, 3-4 is on, and the zero-sequence current ratio test is selected (applying a large current of more than 60A).

[0069] (2) When the second gear is engaged, 5-6 are connected, 7-8 are connected, and the neutral gear is achieved without any function (a large current of more than 60A is applied).

[0070] (3) When the first gear is engaged, 9-10 and 11-12 are connected, and the phase current ratio test is selected (applying a large current of more than 60A).

[0071] Among them, the contact group 11 and 12 in XN2 is a normally closed contact group, the contact group 3 and 4 in XN1 is a normally closed contact, the contact group 7 and 8 in XN1 is a normally closed contact, and the contact group 11 and 12 in XN1 is a normally closed contact.

[0072] It can be understood that the test instrument components include a second digital meter, a bidirectional pointer meter and a second contactor. The input end of the second digital meter is connected to the other end of the three first switch contact groups of the first knob and to the other end of one of the second switch contact groups. The output end of the second digital meter is connected to one end of the bidirectional pointer meter and one contact in the control contact group of the second contactor in sequence. The two contacts of the auxiliary contact group of the second contactor are respectively connected to the other end of the bidirectional pointer meter and another contact in the control contact group. The other contact of the control contact group is connected to the second contact in the eighth normally open contact group of the fifth relay. The first contact corresponding to the second contact in the eighth normally open contact group is connected to the phase current common end of the second terminal block 230.

[0073] For example, Figure 7 As shown, the second digital meter is M2, the bidirectional pointer meter is M3, the second contactor is JC1-2, and the control contact group of JC1-2 is 21 and 22. Pressing a button can control the opening and closing of this contact control group. The two contacts 13 and 14 of the auxiliary contact group of JC1-2 are used to implement polarity testing and ratio testing through the control contact group 21 and 22 of JC1-2. During testing, the phase current common terminal and the zero-sequence current common terminal of the tested switch product 300 need to be short-circuited together (two OT terminals); otherwise, the test cannot be performed normally. In other words, the transformer CT wiring method of the tested switch product 300 is: the common terminals of the A and B mutual inductors are connected together; the common terminals of the C and zero-sequence mutual inductors are connected together. Among them, the transformer polarity test is manually connected to XT2 to perform the A, B, and C three-phase switching test.

[0074] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A testing device, characterized in that: include: A test circuit group, comprising a closing circuit module, an opening circuit module, a storage circuit module, a polarity test circuit module, a ratio test circuit module, and a multi-function test module; A control component includes a first button, a second button, a third button, a fourth button, a fifth button, a first knob and a second knob; the first button is connected to the closing circuit module, and the first button is used to control the closing circuit module and the switch product to be tested to be connected or disconnected; the second button is connected to the opening circuit module, and the second button is used to control the opening circuit module and the switch product to be tested to be connected or disconnected; the third button is connected to the energy storage circuit module, and the third button is used to control the energy storage circuit module and the switch product to be tested to be connected or disconnected; the fourth button is connected to the polarity test circuit module, and the fourth button is used to control the polarity test circuit module and the switch product to be tested to be connected or disconnected; the fifth button is connected to the ratio test circuit module, and the fifth button is used to control the ratio test circuit module and the switch product to be tested to be connected or disconnected; the first knob and the second knob are both connected to the multi-function test module, the first knob is used to control the current type of the phase current connected to the multi-function test module to perform a phase current test; the second knob is used to control the multi-function test module to perform a phase current test or a zero-sequence current test.

2. The testing device according to claim 1, wherein: The test circuit group also includes a first power supply module, which is used to provide linear voltages of different proportions. The closing circuit module includes a first relay; the opening circuit module includes a second relay, the two input ends of the first power supply module are respectively connected to the live wire and the neutral wire, and the two output ends of the second power supply module are respectively connected to the first contacts of the two groups of first normally open contact groups of the first relay, and the second contacts of the first normally open contact groups are connected to the switch product to be tested; and the two output ends of the second power supply module are also respectively connected to the first contacts of the two groups of second normally open contact groups of the second relay, and the second contacts of the second normally open contact groups corresponding to the first contacts are connected to the switch product to be tested; the first end of the first button is connected to an external power supply, the second end of the first button is connected to the first contact of the first normally closed contact group of the first relay, and the second contact of the first normally closed contact group is grounded; the first end of the second button is connected to an external power supply, the second end of the second button is connected to the first contact of the second normally closed contact group of the second relay, and the second contact of the second normally closed contact group is grounded.

3. The testing device according to claim 1, wherein: The energy storage circuit module includes a first power conversion module and a third relay, wherein the two input ends of the first power conversion module are respectively connected to the live wire and the neutral wire, and the two output ends of the first power conversion module are respectively connected to the first contacts of the two groups of third normally open contact groups of the third relay, and the second contacts corresponding to the first contacts in the third normally open contact group are connected to the switch product to be tested; the first end of the third button is connected to the external power supply, the second end of the third button is connected to the first contact of the third normally closed contact group in the third relay, and the second contact of the third normally closed contact group is grounded.

4. The testing device according to claim 3, characterized in that: The polarity test circuit module includes a fourth relay, a second power conversion module and a first resistor. The two input ends of the second power conversion module are respectively connected to the live wire and the neutral wire, and the two output ends of the second power conversion module are respectively connected to the first contacts of the two groups of fourth normally open contact groups of the fourth relay. The second contact in the fourth normally open contact group corresponding to the positive end of the second power conversion module is connected to one end of the first resistor, and the other end of the first resistor is connected to the positive power input end of the switch product to be tested; one end of the fourth button is connected to the external power supply, and the other end of the fourth button is connected to the first contact in the fourth normally closed contact group of the fourth relay, and the second contact in the fourth normally closed contact group is grounded.

5. The testing device according to claim 4, characterized in that: The testing device also includes a first terminal block; the input end of the first terminal block is connected to the live wire and the neutral wire, part of the output end of the first terminal block is connected to the two input ends of the first power conversion module, and part of the output end of the first terminal block is connected to the two input ends of the second power conversion module.

6. The testing device according to claim 1, wherein: The ratio test circuit module includes a first contactor, a voltage regulator, a current booster, a mutual inductor and a first digital meter; the first contacts of the two groups of fifth normally open contact groups of the first contactor are connected to the live wire and the neutral wire, and the second contacts corresponding to the first contacts in the two fifth normally open contact groups are respectively connected to the two input ends of the voltage regulator, the two output ends of the voltage regulator are respectively connected to the current booster, the positive end of the current booster is connected to the input end of the mutual inductor, the first digital meter is connected in parallel with the mutual inductor, and the output end of the mutual inductor and the negative output end of the current booster are connected to the switch product to be tested; the fifth button is used to control the fifth normally closed contact group of the first contactor to turn on or off the fifth normally open contact group.

7. The testing device according to claim 6, characterized in that Two fifth buttons are provided, one end of each of the two fifth buttons is connected to an external power supply, and the other end of one of the fifth buttons is connected to the first contact of the fifth normally closed contact group of the first contactor to control the closing of the two groups of the fifth normally open contact groups; The second contact corresponding to the first contact in the fifth normally closed contact group of the first contactor is grounded; the other end of another fifth button is connected to the second contact of a sixth normally open contact group of the first contactor to connect to an external power supply, and the first contact corresponding to the first contact in the sixth normally open contact group is connected to the other end of one of the fifth buttons.

8. The testing device according to claim 7, characterized in that: The ratio test circuit module also includes two indicator lights, one end of one of the indicator lights is connected to the first contact of the sixth normally open contact group and the first contact of the fifth normally closed contact group, and the other end of one of the indicator lights is connected to an external power supply; one end of the other indicator light is connected to the external power supply, and the other end of the other indicator light is connected to the first contact of the seventh normally closed contact group of the first contactor, and the second contact of the seventh normally closed contact group is grounded.

9. The testing device according to claim 1, wherein: The multifunctional test module includes a second terminal block, a fifth relay, and a test instrument component, wherein the three phase current pins of the second terminal block are respectively connected to the first contacts of the three groups of seventh normally open contact groups of the relay, the second contacts corresponding to the first contacts in the three groups of seventh normally open contact groups are respectively connected to one end of the three first switch contact groups of the first knob, and the other ends of the three first switch contact groups of the first knob are respectively connected to the test instrument component; One end of the second switch contact group of the second knob is connected to the first contact of the sixth normally closed contact group of the fifth relay and the other end of the second switch contact group is connected to an external power supply. One end of the two third switch contact groups of the second knob are respectively connected to the zero-sequence power supply positive terminal and the zero-sequence power supply negative terminal of the second terminal block. The other end of one of the third switch contact groups is connected to the input end of the test instrument element, and the output end of the test instrument element is connected to the other end of the other third switch contact group and connected to the second contact in the eighth normally open contact group of the fifth relay. The first contact corresponding to the second contact in the eighth normally open contact group is connected to the phase current common end of the second terminal block.

10. The testing device according to claim 9, characterized in that: The test instrument components include a second digital meter, a bidirectional pointer meter and a second contactor. The input end of the second digital meter is connected to the other end of the three first switch contact groups of the first knob and to the other end of one of the second switch contact groups. The output end of the second digital meter is connected to one end of the bidirectional pointer meter and one contact in the control contact group of the second contactor in sequence. The two contacts of the auxiliary contact group of the second contactor are respectively connected to the other end of the bidirectional pointer meter and another contact in the control contact group. The other contact of the control contact group is connected to the second contact in the eighth normally open contact group of the fifth relay. The first contact corresponding to the second contact in the eighth normally open contact group is connected to the phase current common end of the second terminal block.

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