Testing device and testing method for electric operating mechanism of circuit breaker

Abstract

The invention provides a testing device and a testing method for an electric operating mechanism of a circuit breaker, and relates to the technical field of circuit breaker detection, the testing device comprises a switch module, a logic control module and a counting module, the switch module is used for controlling the working state of the logic control module and sending a control signal; the logic control module is connected with the to-be-tested circuit breaker, the logic control module comprises a first control unit and a second control unit, the first control unit is used for performing signal conversion and amplification on a control signal to obtain a control command, and the second control unit is used for performing delay control on the to-be-tested circuit breaker to perform closing and opening according to the control command; and the counting module is connected with the to-be-tested circuit breaker and is used for counting the opening and closing times of the to-be-tested circuit breaker to obtain a test result. According to the invention, the testing accuracy of the electric operating mechanism of the circuit breaker is effectively improved, various circuit breakers can be effectively tested, and the universality of the testing device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker detection, and in particular to a testing device and a testing method for an electric operating mechanism of a circuit breaker. Background Art

[0002] As the core actuator of a circuit breaker, the long-term reliability of the electric operating mechanism is crucial to the stable operation of the power system. Therefore, testing the number of operation cycles of the circuit breaker's electric operating mechanism has become a key component in power system operation and maintenance. Traditional testing methods rely primarily on manual operation of the circuit breaker's opening and closing buttons, and counting the number of operation cycles using mechanical counters or manual recording. However, technological advancements have gradually led to the emergence of simple automated testing equipment and microcontroller-based intelligent testing equipment. The former typically uses relay logic circuits to implement basic operation count functions, while the latter leverages microcontrollers to support more complex control logic and diverse functions.

[0003] Current testing solutions are often designed for specific types or specifications of circuit breakers, resulting in limited versatility. Because circuit breakers from different manufacturers vary significantly in operating mechanism structure, control signals, and electrical parameters, a single test device is difficult to use across multiple models. Furthermore, existing testing solutions can generate errors when detecting opening and closing action signals due to signal interference or insufficient detection sensitivity, affecting the accuracy of the number of operations. Therefore, improving the versatility and accuracy of circuit breaker electric operating mechanism testing has become a pressing technical challenge. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a testing device and a testing method for an electric operating mechanism of a circuit breaker, which effectively solve the problems of insufficient versatility and accuracy in testing the electric operating mechanism of a circuit breaker.

[0005] In a first aspect, the present invention provides a test device for a circuit breaker electric operating mechanism, the test device comprising a switch module, a logic control module, and a counting module, wherein:

[0006] The switch module is connected to the logic control module, and the switch module is used to control the working state of the logic control module and send a control signal;

[0007] The logic control module is connected to the circuit breaker to be tested, and includes a first control unit and a second control unit. The first control unit is used to convert and amplify the control signal to obtain a control command, and the second control unit is used to control the circuit breaker to be tested to close and open according to the control command with a time delay.

[0008] The counting module is connected to the circuit breaker to be tested, and is used to count the number of times the circuit breaker to be tested is opened and closed to obtain a test result.

[0009] In an optional embodiment, the switch module includes a miniature circuit breaker, a start switch and a stop switch, wherein:

[0010] The first end of the miniature circuit breaker is connected to a power source, the second end of the miniature circuit breaker is connected to the first end of the stop switch, the second end of the stop switch is connected to the first control unit, and the first control unit is connected to the start switch.

[0011] In an optional embodiment, the first control unit includes a first relay and a second relay, wherein:

[0012] A first end of the first relay is connected to a first end of the start switch, a second end of the first relay is connected to the counting module, a third end of the first relay is connected to a second end of the stop switch, and a fourth end of the first relay is connected to the second control unit;

[0013] The first end of the second relay is connected to the second end of the starting switch, the second end of the second relay is connected to the circuit breaker to be tested, and the third end and the fourth end of the second relay are connected to the second control unit.

[0014] In an optional embodiment, the second control unit includes a third relay and a fourth relay, wherein:

[0015] The first end of the third relay is connected to the circuit breaker to be tested, the second end of the third relay is connected to the circuit breaker to be tested and the third end of the fourth relay, the third end of the third relay is connected to the first end of the fourth relay, and the fifth end of the third relay is connected to the fourth end of the first relay;

[0016] The second end of the fourth relay is connected to the circuit breaker to be tested, the fourth end of the fourth relay is connected to the third end of the second relay, the fifth end of the fourth relay is connected to the circuit breaker to be tested, and the sixth end of the fourth relay is connected to the fourth end of the second relay.

[0017] In an optional embodiment, the counting module includes an intelligent counter, wherein:

[0018] The first and second ends of the intelligent counter are connected to the auxiliary contacts of the circuit breaker to be tested, the third end of the intelligent counter is connected to the second end of the first relay, the fourth end of the intelligent counter is connected to the third end of the first relay, the fifth end of the intelligent counter is connected to the second end of the first relay, and the sixth end of the intelligent counter is connected to a power supply.

[0019] In a second aspect, the present invention provides a method for testing an electric operating mechanism of a circuit breaker. The method is applied to the testing device for the electric operating mechanism of the circuit breaker according to the first aspect of the present invention. The method comprises:

[0020] The switch module controls the working state of the logic control module and sends control signals;

[0021] The first control unit of the logic control module performs signal conversion and amplification on the control signal to obtain a control command;

[0022] The second control unit of the logic control module delays controlling the circuit breaker to be tested to close and open according to the control command;

[0023] The counting module counts the number of times the circuit breaker to be tested is opened and closed to obtain a test result.

[0024] In an optional embodiment, the switch module controls the working state of the logic control module and sends a control signal, including:

[0025] The start switch is closed and power is supplied to the second relay through the miniature circuit breaker;

[0026] The coil of the second relay is energized, closing the normally open contact to achieve self-locking;

[0027] When the stop switch is closed, the coil of the first relay is energized, the normally closed contact is opened, and the test device stops running.

[0028] In an optional embodiment, the second control unit of the logic control module controls the closing and opening of the circuit breaker under test with a time delay according to the control command, including:

[0029] The third relay is powered on and starts timing. After the power-on time reaches the first set delay time, the normally open contact of the third relay is closed, and the circuit breaker to be tested performs a closing operation;

[0030] The auxiliary contact of the circuit breaker to be tested is closed, the fourth relay coil is energized, and after the energization time reaches the second set delay time, the circuit breaker to be tested performs an opening operation.

[0031] In an optional embodiment, if the circuit breaker under test performs the closing operation a preset number of times, the auxiliary contact of the circuit breaker under test feeds back a dry contact signal to an intelligent counter, and the intelligent counter counts to obtain the number of opening and closing operations.

[0032] In an optional embodiment, if an abnormality occurs during the process of the circuit breaker to be tested performing the closing operation or the opening operation, the miniature circuit breaker cuts off the power supply.

[0033] The test device and test method for the electric operating mechanism of a circuit breaker provided by the present invention adopt precise electrical control logic and utilize the coordinated work of components such as relays to accurately control the time interval and action sequence of the circuit breaker's opening and closing. Through signal conversion and amplification, it is ensured that the control instructions can be accurately transmitted to the circuit breaker to be tested, driving it to reliably perform the opening and closing actions. At the same time, the precise delay setting ensures that the time of each opening and closing operation meets the actual test requirements, avoiding inaccurate test results due to time errors, thereby effectively improving the accuracy and stability of the test and providing a reliable data basis for the performance evaluation of the circuit breaker's electric operating mechanism. At the same time, through the reasonable design of the control circuit and interface, the control signal types and electrical parameter differences of different circuit breakers are fully considered. Through flexible parameter settings and circuit adjustments, effective testing of multiple circuit breakers is achieved, improving the versatility and practicality of the test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 1 is a schematic structural diagram of a test device for a circuit breaker electric operating mechanism provided by an embodiment of the present invention;

[0036] Figure 2 This is a first electrical schematic diagram of a test device for a circuit breaker electric operating mechanism provided by an embodiment of the present invention;

[0037] Figure 3 This is a second electrical schematic diagram of a test device for a circuit breaker electric operating mechanism provided by an embodiment of the present invention;

[0038] Figure 4 The figure is a flow chart of a method for testing an electric operating mechanism of a circuit breaker provided by an embodiment of the present invention.

[0039] Explanation of the main component symbols: 100-test device; 110-switch module; 120-logic control module; 130-counting module; 200-circuit breaker module; SCQF-circuit breaker to be tested; QF-miniature circuit breaker; SB1-start switch; SB2-stop switch; KA1-first relay; KA2-second relay; KT1-third relay; KT2-fourth relay; JSQ-intelligent counter. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be further clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be noted that the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] Currently, the number of operations performed on circuit breaker electric operating mechanisms is primarily tested using simple automated test equipment and microcontroller-based intelligent test equipment. Simple automated test equipment uses relay logic circuits to implement basic operation count statistics. However, when detecting opening and closing action signals, signal interference or insufficient detection sensitivity may result in counting errors, making it impossible to accurately count the number of operations. Microcontroller-based intelligent test equipment utilizes microcontrollers to support more complex control logic and diverse functions. However, these devices are often designed for specific types or specifications of circuit breakers and lack universality. Circuit breakers produced by different manufacturers may have different operating mechanism structures, control signals, and electrical parameters, making it difficult for a single test device to be compatible with multiple models of circuit breakers.

[0044] Example 1

[0045] An embodiment of the present invention provides a test device for an electric operating mechanism of a circuit breaker, which effectively solves the problem of insufficient versatility and accuracy in testing the electric operating mechanism of a circuit breaker. Figure 1 FIG. 1 is a schematic structural diagram of a test device for a circuit breaker electric operating mechanism according to an embodiment of the present invention. Figure 1 As shown, the testing device 100 includes a switch module 110 , a logic control module 120 and a counting module 130 .

[0046] The switch module 110 is connected to the logic control module 120 . The switch module 110 is used to control the working state of the logic control module 120 and send a control signal. Figure 2 This is a first electrical schematic diagram of a test device for a circuit breaker electric operating mechanism according to an embodiment of the present invention, as shown in FIG. Figure 2 As shown, the switch module 110 includes a miniature circuit breaker QF, a start switch SB1 and a stop switch SB2. The first end of the miniature circuit breaker QF is connected to the power supply, the second end of the miniature circuit breaker QF is connected to the first end of the stop switch SB2, the second end of the stop switch SB2 is connected to the first control unit, and the first control unit is connected to the start switch SB1.

[0047] In an embodiment of the present invention, a 220V power supply supplies power to the test device 100 through a miniature circuit breaker QF, which is used to protect the circuit of the test device 100 from faults such as overload and short circuit, ensuring the safe and stable operation of the test device 100. The start switch SB1 and the stop switch SB2 are key components for controlling the start and stop of the test device 100. The start switch SB1 and the stop switch SB2 include but are not limited to mechanical buttons and touch switches. In an embodiment of the present invention, the start switch SB1 and the stop switch SB2 are both touch switches. The touch switches have the characteristics of being beautiful, durable, and sensitive to operation, which can enhance the overall appearance and operating experience of the test device 100. In some applications that have high requirements for the appearance and ease of operation of the equipment, touch switches have significant advantages.

[0048] The logic control module 120 is connected to the circuit breaker module 200, which includes at least a circuit breaker SCQF to be tested, that is, the logic control module 120 is connected to the circuit breaker SCQF to be tested, and the logic control module 120 includes a first control unit and a second control unit. The first control unit is used to convert and amplify the control signal to obtain a control command, and the second control unit is used to delay control of the circuit breaker SCQF to be tested to close and open according to the control command.

[0049] The first control unit includes a first relay KA1 and a second relay KA2. The first relay KA1 and the second relay KA2 include but are not limited to devices such as intermediate relays and solid-state relays. In an embodiment of the present invention, the first relay KA1 and the second relay KA2 adopt intermediate relays. The intermediate relay is an electrical device that works on the electromagnetic principle. When the coil is energized, the iron core generates a magnetic field, attracting the contacts to close, thereby achieving control of the circuit. When the coil is de-energized, the iron core loses the magnetic field, and the contacts return to their original state under the action of the spring. The intermediate relay has a large number of contacts to meet the needs of different control circuits. At the same time, it can convert an input signal into one or more output signals to achieve signal transmission and amplification. The reliable signal conversion and amplification function of the intermediate relay ensures that the control instructions can be accurately transmitted to the circuit breaker SCQF to be tested, thereby improving the accuracy of the test.

[0050] Specifically, a first end of the first relay KA1 is connected to the first end of the start switch SB1, a second end of the first relay KA1 is connected to the counting module 130, a third end of the first relay KA1 is connected to the second end of the stop switch SB2, and a fourth end of the first relay KA1 is connected to the second control unit. A first end of the second relay KA2 is connected to the second end of the start switch SB1, a second end of the second relay KA2 is connected to the circuit breaker under test SCQF, and the third and fourth ends of the second relay KA2 are connected to the second control unit.

[0051] The second control unit includes a third relay KT1 and a fourth relay KT2. In the embodiment of the present invention, the third relay KT1 and the fourth relay KT2 are time relays. The time relays are used to implement delay control and have a high-precision timing function. In the embodiment of the present invention, because the opening and closing of the circuit breaker SCQF under test does not require high precision, and continuous opening and closing may cause the circuit breaker SCQF under test to heat up, the time relays are selected with an accuracy of 1s-10s, and are set to execute an opening or closing command every 3s-5s.

[0052] Specifically, a first end of the third relay KT1 is connected to the circuit breaker SCQF under test, a second end of the third relay KT1 is connected to the circuit breaker SCQF under test and the third end of the fourth relay KT2, a third end of the third relay KT1 is connected to the first end of the fourth relay KT2, and a fifth end of the third relay KT1 is connected to the fourth end of the first relay KA1. A second end of the fourth relay KT2 is connected to the circuit breaker SCQF under test, a fourth end of the fourth relay KT2 is connected to the third end of the second relay KA2, a fifth end of the fourth relay KT2 is connected to the circuit breaker SCQF under test, and a sixth end of the fourth relay KT2 is connected to the fourth end of the second relay KA2.

[0053] Figure 3This is a second electrical schematic diagram of the test device for the electric operating mechanism of a circuit breaker provided in an embodiment of the present invention, such as Figure 3 As shown, the closing and opening coils of the circuit breaker SCQF under test are controlled by the third relay KT1 and the fourth relay KT2, respectively. To ensure the reliability of the closing and opening coil circuits, two sets of auxiliary contacts are added to the circuit breaker SCQF for interlocking purposes. This control method enables on-off control of the main circuit of the electric operating mechanism of the circuit breaker SCQF under test, thereby controlling the opening and closing of the circuit breaker SCQF under test.

[0054] The counting module 130 is connected to the circuit breaker SCQF to be tested. The counting module 130 is used to count the number of times the circuit breaker SCQF to be tested is opened and closed to obtain the test results. The counting module 130 includes but is not limited to the use of an intelligent counter JSQ and a programmable intelligent counter JSQ. In an embodiment of the present invention, the counting module 130 uses an intelligent counter JSQ. The intelligent counter JSQ uses digital circuit technology to accurately count the number of pulses passing through a given time and display the counting results, with high measurement accuracy. At the same time, the intelligent counter JSQ uses dry contact signals for counting through flexible parameter settings and circuit adjustments. Different models of circuit breakers can output dry contact signals for counting as long as auxiliary contacts are added. This compatibility design greatly improves the versatility and practicality of the test device 100, and reduces the cost of enterprises purchasing multiple test equipment for testing different models of equipment.

[0055] The JSQ intelligent counter can quickly and accurately identify the changing signals of the circuit breaker's opening and closing states and accurately count them. The JSQ intelligent counter also has excellent anti-interference performance and can operate stably in complex electromagnetic environments, avoiding counting errors caused by external interference. The display and storage functions of the JSQ intelligent counter make it easy for testers to read and record test data, facilitating subsequent data analysis and processing.

[0056] Specifically, the first and second ends of the intelligent counter JSQ are connected to the auxiliary contacts of the circuit breaker SCQF to be tested, the third end of the intelligent counter JSQ is connected to the second end of the first relay KA1, the fourth end of the intelligent counter JSQ is connected to the third end of the first relay KA1, the fifth end of the intelligent counter JSQ is connected to the second end of the first relay KA1, and the sixth end of the intelligent counter JSQ is connected to the power supply.

[0057] The test device for the electric operating mechanism of a circuit breaker provided in an embodiment of the present invention adopts precise electrical control logic and utilizes the coordinated work of components such as relays to accurately control the time interval and action sequence of the circuit breaker's opening and closing. Through signal conversion and amplification, it is ensured that the control instructions can be accurately transmitted to the circuit breaker to be tested, driving it to reliably perform the opening and closing actions. At the same time, the precise delay setting ensures that the time of each opening and closing operation meets the actual test requirements, avoiding inaccurate test results due to time errors, thereby effectively improving the accuracy and stability of the test and providing a reliable data basis for the performance evaluation of the circuit breaker's electric operating mechanism. At the same time, through the reasonable design of the control circuit and interface, the control signal types and electrical parameter differences of different circuit breakers are fully considered. Through flexible parameter settings and circuit adjustments, effective testing of multiple circuit breakers is achieved, improving the versatility and practicality of the test device.

[0058] Example 2

[0059] Based on the same technical concept as the above embodiment 1, the embodiment of the present invention provides a method for testing the electric operating mechanism of a circuit breaker. The testing method is applied to the testing device 100 in embodiment 1. Figure 4 FIG. 1 is a flow chart of a method for testing a circuit breaker electric operating mechanism according to an embodiment of the present invention. Figure 4 As shown, the test method includes the following steps:

[0060] S100: The switch module controls the working state of the logic control module and sends a control signal.

[0061] In this embodiment of the present invention, if the start switch SB1 is closed, a 220V power supply is supplied to the test device 100 via the miniature circuit breaker QF. At this point, the coil of the second relay KA2 is energized, and its normally open contacts close, achieving self-locking, maintaining the circuit continuity of the test device 100. If the stop switch SB2 is closed, the coil of the second relay KA2 is energized, and its normally closed contacts open. This then causes power loss to the logic control module 120, resulting in a loss of power to the entire main circuit of the circuit breaker under test SCQF and the cessation of test device 100 operation. The design of the stop switch SB2 ensures that power to the test device 100 can be quickly cut off when necessary, ensuring the safety of the test device 100 and personnel.

[0062] S200: The first control unit of the logic control module performs signal conversion and amplification on the control signal to obtain a control command.

[0063] In the embodiment of the present invention, the first relay KA1 and the second relay KA2 of the first control unit receive control signals from the switch module 110 , convert and amplify the received control signals, so that the control signals meet the requirements of the second control unit.

[0064] S300: The second control unit of the logic control module controls the circuit breaker to be tested to close and open with a time delay according to the control command.

[0065] In this embodiment of the present invention, the third relay KT1 is energized and begins timing. This design ensures a stable startup operation. After the start switch SB1 is pressed, the circuit remains energized, preparing for the subsequent startup of the relevant components of the test device 100. When the energization time reaches a first set delay time, the normally open contact of the third relay KT1 closes, the closing coil of the circuit breaker under test SCQF closes, and the circuit breaker under test SCQF executes the closing operation. In this embodiment of the present invention, the first set delay time is set to 5 seconds.

[0066] When the circuit breaker SCQF to be tested is in the open state, the auxiliary contact OF4 of the circuit breaker SCQF to be tested remains in the normally open state. When the circuit breaker SCQF to be tested is in the closed state, the auxiliary contact OF4 changes from the normally open state to the normally closed state, and the coil of the fourth relay KT2 is energized. After the energization time reaches the second set delay time, the circuit breaker SCQF to be tested performs the opening operation. In this embodiment of the present invention, the second set delay time is set to 5S.

[0067] When the circuit breaker SCQF is closed, the normally open and normally closed states of its auxiliary contact OF2 are switched accordingly, closing the opening coil of the circuit breaker SCQF and performing the opening operation. The time delay design of the third relay KT1 and the fourth relay KT2 prevents instantaneous startup of the test device 100, providing other components of the test device 100 with time to prepare, helping to protect the test device 100 and extend its service life.

[0068] During the operation of the electric operating mechanism of the circuit breaker SCQF under test, if an abnormal situation occurs, such as overload and short circuit, the miniature circuit breaker QF can cut off the circuit in time to protect the electric operating mechanism of the circuit breaker SCQF under test from damage.

[0069] S400: The counting module counts the number of times the circuit breaker is opened and closed to obtain a test result.

[0070] During the continuous operation of the test device 100, if a counting task needs to be performed, the intelligent counter JSQ will count the number of opening and closing operations of the circuit breaker SCQF to be tested. Users can flexibly set the counting conditions according to actual needs, such as setting the number range of closing operations of the circuit breaker SCQF to be tested. When the circuit breaker SCQF to be tested completes a predetermined number of closing operations, its auxiliary contacts will quickly feed back a dry contact signal to the intelligent counter JSQ. After receiving the dry contact signal, the intelligent counter JSQ will accurately perform the counting operation. Once the count reaches the preset value, the intelligent counter JSQ will output a dry contact signal again, and the dry contact signal will act on the first relay KA1 to energize its coil. After the coil of the first relay KA1 is energized, it will further cut off the subsequent control power supply, thereby achieving effective control of the operating status of the equipment.

[0071] As a preferred implementation of an embodiment of the present invention, when the intelligent counter JSQ reaches a preset value, its feedback signal will energize the coil of the first relay KA1, thereby cutting off the power supply of the electric operating mechanism of the circuit breaker SCQF to be tested, ultimately achieving precise control of the equipment.

[0072] The test method for a circuit breaker's electric operating mechanism, provided in an embodiment of the present invention, utilizes automated control circuits and fast-response relays to enable rapid switching and continuous testing of circuit breaker opening and closing operations. This eliminates the need for frequent manual operation, significantly shortening testing time and improving testing efficiency. Flexible parameter settings and circuit adjustments enable effective testing of a wide range of circuit breakers, improving the design's versatility and practicality while reducing the cost of purchasing multiple test equipment required to test different circuit breaker models.

[0073] In summary, the test device and test method for the electric operating mechanism of a circuit breaker provided by the present invention adopt precise electrical control logic and utilize the coordinated work of components such as relays to accurately control the time interval and action sequence of the circuit breaker's opening and closing. Signal conversion and amplification ensure that the control instructions can be accurately transmitted to the circuit breaker to be tested, driving it to reliably perform the opening and closing actions. At the same time, the precise delay setting ensures that the time of each opening and closing operation meets the actual test requirements, avoiding inaccurate test results caused by time errors, thereby effectively improving the accuracy and stability of the test and providing a reliable data basis for the performance evaluation of the circuit breaker's electric operating mechanism. At the same time, through the reasonable design of the control circuit and interface, the control signal types and electrical parameter differences of different circuit breakers are fully considered. Through flexible parameter settings and circuit adjustments, effective testing of multiple circuit breakers is achieved, improving the versatility and practicality of the test device.

[0074] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0075] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A test device for a circuit breaker electric operating mechanism, characterized in that: The testing device includes a switch module, a logic control module and a counting module, wherein: The switch module is connected to the logic control module, and the switch module is used to control the working state of the logic control module and send a control signal; The logic control module is connected to the circuit breaker to be tested, and includes a first control unit and a second control unit. The first control unit is used to convert and amplify the control signal to obtain a control command, and the second control unit is used to control the circuit breaker to be tested to close and open according to the control command with a time delay. The counting module is connected to the circuit breaker to be tested, and is used to count the number of times the circuit breaker to be tested is opened and closed to obtain a test result.

2. The circuit breaker electric operating mechanism testing device according to claim 1, characterized in that: The switch module includes a miniature circuit breaker, a start switch and a stop switch, wherein: The first end of the miniature circuit breaker is connected to a power source, the second end of the miniature circuit breaker is connected to the first end of the stop switch, the second end of the stop switch is connected to the first control unit, and the first control unit is connected to the start switch.

3. The circuit breaker electric operating mechanism testing device according to claim 2, characterized in that: The first control unit includes a first relay and a second relay, wherein: A first end of the first relay is connected to a first end of the start switch, a second end of the first relay is connected to the counting module, a third end of the first relay is connected to a second end of the stop switch, and a fourth end of the first relay is connected to the second control unit; The first end of the second relay is connected to the second end of the starting switch, the second end of the second relay is connected to the circuit breaker to be tested, and the third end and the fourth end of the second relay are connected to the second control unit.

4. The circuit breaker electric operating mechanism testing device according to claim 3, characterized in that: The second control unit includes a third relay and a fourth relay, wherein: The first end of the third relay is connected to the circuit breaker to be tested, the second end of the third relay is connected to the circuit breaker to be tested and the third end of the fourth relay, the third end of the third relay is connected to the first end of the fourth relay, and the fifth end of the third relay is connected to the fourth end of the first relay; The second end of the fourth relay is connected to the circuit breaker to be tested, the fourth end of the fourth relay is connected to the third end of the second relay, the fifth end of the fourth relay is connected to the circuit breaker to be tested, and the sixth end of the fourth relay is connected to the fourth end of the second relay.

5. The circuit breaker electric operating mechanism testing device according to claim 4, characterized in that: The counting module includes an intelligent counter, wherein: The first and second ends of the intelligent counter are connected to the auxiliary contacts of the circuit breaker to be tested, the third end of the intelligent counter is connected to the second end of the first relay, the fourth end of the intelligent counter is connected to the third end of the first relay, the fifth end of the intelligent counter is connected to the second end of the first relay, and the sixth end of the intelligent counter is connected to a power supply.

6. A method for testing a circuit breaker electric operating mechanism, characterized in that: The testing method is applied to the testing device of the circuit breaker electric operating mechanism according to any one of claims 1 to 5, and the testing method comprises: The switch module controls the working state of the logic control module and sends control signals; The first control unit of the logic control module performs signal conversion and amplification on the control signal to obtain a control command; The second control unit of the logic control module delays controlling the circuit breaker to be tested to close and open according to the control command; The counting module counts the number of times the circuit breaker to be tested is opened and closed to obtain a test result.

7. The method for testing the electric operating mechanism of a circuit breaker according to claim 6, characterized in that: The switch module controls the working state of the logic control module and sends a control signal, including: The start switch is closed and power is supplied to the second relay through the miniature circuit breaker; The coil of the second relay is energized, closing the normally open contact to achieve self-locking; When the stop switch is closed, the coil of the first relay is energized, the normally closed contact is opened, and the test device stops running.

8. The method for testing the electric operating mechanism of a circuit breaker according to claim 6, wherein: The second control unit of the logic control module delays controlling the circuit breaker to be tested to close and open according to the control command, including: The third relay is powered on and starts timing. After the power-on time reaches the first set delay time, the normally open contact of the third relay is closed, and the circuit breaker to be tested performs a closing operation; The auxiliary contact of the circuit breaker to be tested is closed, the fourth relay coil is energized, and after the energization time reaches the second set delay time, the circuit breaker to be tested performs an opening operation.

9. The method for testing the electric operating mechanism of a circuit breaker according to claim 8, characterized in that: If the circuit breaker to be tested performs the closing operation a preset number of times, the auxiliary contact of the circuit breaker to be tested feeds back a dry contact signal to the intelligent counter, and the intelligent counter counts to obtain the number of opening and closing operations.

10. The method for testing the electric operating mechanism of a circuit breaker according to claim 8, characterized in that: If an abnormality occurs during the closing operation or the opening operation of the circuit breaker to be tested, the miniature circuit breaker cuts off the power supply.

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