A closing and opening switch navigation plug-in tester

Abstract

The utility model belongs to the technical field of opening and closing test appearance, concretely relates to a kind of opening and closing navigation plug-in test appearance, including sine wave voltage regulator, 12V module, voltage transformer, AC voltmeter, AC ammeter, 250-volt voltage output end, 0.01A-100A current output end and current voltage public output end, the input end of sine wave voltage regulator is electrically connected with 12V module, the primary winding of voltage transformer is electrically connected with the output end of sine wave voltage regulator, and AC voltmeter and AC ammeter are all electrically connected on the secondary winding of voltage transformer.The utility model is through the module design of integration, realize the compactness of equipment structure, compared with traditional cumbersome test instrument, more convenient to carry to outdoor substation, field construction point and other mobile scene to carry out test work, reduce the physical burden and space limitation of field operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of circuit breaker testers, specifically relating to a circuit breaker tester with an air-mounted plug. Background Technology

[0002] In the operation and maintenance of power systems, switchgear, as a core control component, directly affects the stability and safety of the power system through its opening and closing performance. Accurate testing of indicators such as opening and closing time, voltage and current parameter precision, and protection function response is crucial for ensuring the reliable operation of switchgear and timely troubleshooting, and is widely used in power engineering construction, substation operation and maintenance, and electrical equipment testing.

[0003] Currently, there are several shortcomings in the market for circuit breaker opening and closing test instruments: First, traditional test instruments are bulky and cumbersome, lacking portability and making them unsuitable for outdoor operations or mobile testing. Second, the purity of the output voltage and current waveforms is insufficient, often being non-sinusoidal, leading to distorted test data and affecting the accurate assessment of equipment performance. Third, their functions are relatively limited, typically only capable of testing opening and closing time or parameters of a single transformer, failing to meet the needs of multiple scenarios such as voltage transformer no-load current, current transformer volt-ampere characteristics, and overcurrent / overvoltage / undervoltage protection action testing. Multiple devices are required for collaborative operation, making operation cumbersome and costly. Fourth, opening and closing time testing often relies on manual wiring switching, which is not only time-consuming and labor-intensive but also prone to coil burnout due to wiring errors, affecting testing. Furthermore, it lacks automated energy storage, unlocking, and opening / closing linkage control mechanisms, resulting in low testing efficiency. Fifth, some instruments have low measurement accuracy and resolution, making it difficult to accurately capture minute voltage and current changes, thus failing to provide reliable data support for equipment fault diagnosis.

[0004] Furthermore, traditional testing instruments lack robust protection functions. In the event of overload, short circuit, or other abnormal conditions during testing, they struggle to respond quickly and disconnect the circuit, potentially damaging the instrument itself or the device under test. Additionally, existing instruments lack convenient interface designs, resulting in complex connection methods with the device under test, further reducing the ease of operation and work efficiency.

[0005] In view of the shortcomings of the existing technology, there is an urgent need for a circuit breaker test instrument that is compact, portable, highly integrated, accurate, and easy to operate, so as to solve the many problems faced by the existing instruments in practical applications and meet the power system’s demand for efficient and accurate testing of switching equipment. Utility Model Content

[0006] To address the technical problems of traditional circuit breaker opening and closing test instruments, this utility model provides a circuit breaker opening and closing plug-in test instrument.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A plug-in tester for opening and closing circuit breakers includes a sinusoidal voltage regulator, a 12V module, a voltage transformer, an AC voltmeter, an AC ammeter, a 250V voltage output terminal, a 0.01A-100A current output terminal, and a common current-voltage output terminal. The input terminal of the sinusoidal voltage regulator is electrically connected to the 12V module, and the output terminal of the sinusoidal voltage regulator is electrically connected to the primary winding of the voltage transformer. The AC voltmeter and AC ammeter are both electrically connected to the secondary winding of the voltage transformer. The secondary winding of the voltage transformer is electrically connected to the 250V voltage output terminal, the 0.01A-100A current output terminal, and the common current-voltage output terminal, respectively.

[0008] The output terminal of the sinusoidal voltage regulator is electrically connected to the primary winding of the voltage transformer via an instrument control button.

[0009] It also includes a rectifier and a DC voltmeter. The input and output terminals of the sinusoidal voltage regulator are electrically connected to the input terminal of the rectifier, and the output terminal of the rectifier is electrically connected to the DC voltmeter.

[0010] It also includes a 5V module, a closing timing module, a closing timing module, a closing switch, and a closing switch. The 5V module is electrically connected to the 12V module. The 5V module is electrically connected to the closing timing module and the closing timing module, respectively. The closing timing module is electrically connected to the closing switch, and the closing timing module is electrically connected to the opening switch.

[0011] The closing timing module is grounded via a first reset button, and the opening timing module is grounded via a second reset button.

[0012] The 12V module is electrically connected to an aviation plug switch, the aviation plug switch is electrically connected to a relay coil, and the relay coil is electrically connected to the 12V module through a third reset switch.

[0013] The first reset button, the second reset button, and the third reset switch are interlocked.

[0014] It also includes a relay, an energy storage coil, a closing coil, a opening coil, and an unlocking coil. The 12V module is electrically connected to the first normally open contact, the second normally open contact, the third normally open contact, and the fourth normally open contact of the relay. The first normally open contact of the relay is electrically connected to the energy storage coil, and the energy storage coil is electrically connected to the third reset switch. The second normally open contact of the relay is electrically connected to the closing coil, and the closing coil is electrically connected to the third reset switch. The third normally open contact of the relay is electrically connected to the opening coil, and the opening coil is electrically connected to the third reset switch. The fourth normally open contact of the relay is electrically connected to the unlocking coil, and the unlocking coil is electrically connected to the third reset switch.

[0015] It also includes an aircraft plug bus, an energy storage switch and an unlocking switch. The closing timing module and the opening timing module are both electrically connected to the aircraft plug bus. The output terminal of the rectifier is electrically connected to the aircraft plug bus through the energy storage switch, the unlocking switch, the closing switch and the opening switch, respectively. The aircraft plug bus is electrically connected to the output terminal of the rectifier.

[0016] The AC voltmeter has an accuracy of 0.2 class and a resolution of 0.1 volts, and is used to display AC voltage parameters; the AC ammeter has an accuracy of 0.2 class and a resolution of 0.01 amps, and is used to display AC current parameters; the DC voltmeter has an accuracy of 0.2 class and a resolution of 0.1 volts, and is used to display DC voltage parameters.

[0017] Compared with the prior art, the advantages of this utility model are: 1. This utility model, by setting a sinusoidal voltage regulator, can output pure sinusoidal voltage and current, effectively avoiding the test data distortion problem caused by the non-sinusoidal output of traditional instruments; at the same time, the AC voltmeter, AC ammeter and DC voltmeter are all designed with an accuracy of 0.2 class, with the AC voltmeter having a resolution of 0.1 volt and the AC ammeter having a resolution of 0.01 amp, which can accurately capture the minute parameter changes in the test of voltage transformer no-load current, current transformer volt-ampere characteristics, etc., providing reliable data support for the performance judgment and fault diagnosis of switching equipment.

[0018] 2. This utility model innovatively integrates an aviation plug female connector, a relay-controlled energy storage coil, a closing coil, a closing coil, and an unlocking coil, along with a closing timing module and a closing timing module. When the function is switched to aviation plug mode, the internal circuit can automatically complete the entire process of switch energy storage, unlocking, closing, and opening, without the need for manual wiring. At the same time, the timing module can automatically record the closing and opening times, which not only avoids human operation errors but also significantly shortens the test time, greatly improving the efficiency of switch closing and opening time testing.

[0019] 3. This utility model integrates multiple testing functions into a single device: relying on a voltage transformer, a 250V voltage output terminal, and a 0.01A-100A current output terminal, it can perform no-load current testing of the voltage transformer and volt-ampere characteristic testing of the current transformer; it can also be used as a current booster for primary current boosting in switch protection; and with a timing module and control structure, it can also complete the start / return value testing and action time testing of overcurrent, overvoltage, and undervoltage protection. It can meet the multi-dimensional testing needs of switchgear in power systems without the need for multiple dedicated instruments, reducing equipment procurement and maintenance costs, and minimizing the inconvenience of moving multiple devices.

[0020] 4. This utility model achieves AC voltage / current output through a sinusoidal voltage regulator, and converts AC to DC through a rectifier, and monitors DC parameters in real time with a DC voltmeter; combined with the DC output mode control knob, it can adapt to the power requirements of different devices under test, breaking the limitation of the separation of AC / DC testing in traditional instruments, and is suitable for switch testing in more power scenarios.

[0021] 5. This utility model is equipped with an interlocked first reset button, a second reset button, and a third reset switch, which are coaxially linked and used for instrument and logic reset after test cycle completion, further improving the safety of the test process.

[0022] 6. This utility model achieves a compact and lightweight equipment structure through integrated modular design. Compared with traditional bulky testing instruments, it is easier to carry to mobile scenarios such as outdoor substations and on-site construction sites to carry out testing work, reducing the physical burden and space limitations of on-site operations. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] Figure 1 This is the circuit diagram for testing the no-load current, volt-ampere characteristics, overcurrent, overvoltage, and undervoltage of the voltage transformer of this utility model. Figure 2 This is a rectifier circuit diagram of the present invention, in which a double-throw switch can easily switch the DC output (controllable DC and direct DC output). Figure 3 This is a circuit diagram for the closing timing, opening timing, and aviation plug logic test of this utility model; Figure 4 This is the circuit diagram of the aircraft connector female head of this utility model; Figure 5 This is the circuit diagram of the 12V module of this utility model; Figure 6This is the circuit diagram of the 5V module of this utility model.

[0026] Wherein: 1 is a sinusoidal voltage regulator, 2 is a 12V module, 3 is a voltage transformer, 4 is an AC voltmeter, 5 is an AC ammeter, 6 is a 250V voltage output terminal, 7 is a 0.01A-100A current output terminal, 8 is a common current and voltage output terminal, 9 is an instrument control button, 10 is a rectifier, 11 is a DC voltmeter, 12 is a 5V module, 13 is a closing timing module, 14 is a opening timing module, 15 is a closing switch, 16 is an opening switch, 17 is a first reset button, 18 is a second reset button, 19 is an aviation plug switch, 20 is a third reset switch, 21 is an energy storage coil, 22 is a closing coil, 23 is an opening coil, 24 is an unlocking coil, 25 is an aviation plug female connector, 26 is an energy storage switch, 27 is an unlocking switch, and SJ is a relay. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. These descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the claims of this utility model. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] This embodiment provides a gate opening and closing plug-in tester, such as... Figures 1-6 As shown, the 12V module 2 serves as the core power supply, providing power to the sinusoidal voltage regulator 1 and the 5V module 12. The 5V module 12 further provides a stable low-voltage power supply to the closing timing module 13 and the opening timing module 14. Simultaneously, the rectifier 10 converts the AC signal output from the sinusoidal voltage regulator 1 into a DC signal to adapt to DC testing scenarios, as detailed below: I. AC Testing (Voltage Transformer No-load Current / Current Transformer I-V Characteristic Test) Power supply and signal regulation: The 12V module 2 inputs the base voltage to the sine wave voltage regulator 1. Adjusting the sine wave voltage regulator 1 can output a pure sine wave AC signal. After the signal is controlled by the instrument control button 9, it is transmitted to the primary winding of the voltage transformer 3 to complete the transformation and isolation of the AC signal.

[0032] Connection of the device under test: Connect the secondary winding of the voltage transformer under test to the 250V voltage output terminal 6 and the common current and voltage output terminal 8, or connect the corresponding winding of the current transformer under test to the 0.01A-100A current output terminal 7 and the common current and voltage output terminal 8 to construct a complete test circuit.

[0033] Parameter monitoring and recording: AC voltmeter 4 and AC ammeter 5 are connected in parallel and series with the secondary winding of voltage transformer 3, respectively. AC voltmeter 4 (accuracy class 0.2, resolution 0.1 volt) displays the secondary output voltage in real time, and AC ammeter 5 (accuracy class 0.2, resolution 0.01 amp) monitors the loop current in real time. By reading the instrument data, the no-load current test of the voltage transformer (recording the secondary current under no-load conditions) or the volt-ampere characteristic test of the current transformer can be completed (adjusting the sinusoidal voltage regulator 1 to change the input and recording multiple sets of voltage-current data).

[0034] Test Reset: After the test is completed, clear the instrument display by pressing the first reset button 17 or the second reset button 18, disconnect the instrument control button 9, and cut off the test circuit.

[0035] II. Current Increment Test (Switch Protection Primary Current Increment and Transformer Ratio Testing) When it is necessary to verify the consistency between the secondary circuit of the switch protection and the current transformer ratio, the current boost function is activated: Current output adjustment: The 12V module 2 continuously supplies power to the sinusoidal voltage regulator 1. Adjusting the sinusoidal voltage regulator 1 changes the amplitude of the AC signal. After conversion by the secondary winding of the voltage transformer 3, the signal is output as a 0-100A pure sinusoidal current to the primary circuit of the switch protection under test through the 0.01A-100A current output terminal 7 and the current-voltage common output terminal 8, thus avoiding detection errors caused by non-sinusoidal waves.

[0036] Transformation ratio verification: Read the primary current value output by the tester through AC ammeter 5, and at the same time observe the current feedback value of the secondary circuit of the protection under test. Compare the ratio of the two with the nominal transformation ratio of the current transformer to determine whether the circuit transformation ratio is correct. After the test is completed, disconnect the instrument control button 9 and press the reset button to clear the zero.

[0037] III. Overcurrent / Overvoltage / Undervoltage Protection Testing Operating condition simulation: Based on the AC output regulation function of the sinusoidal voltage regulator 1, or the DC output after conversion by rectifier 10 (the DC voltage is monitored in real time by DC voltmeter 11, with an accuracy of 0.2 class and a resolution of 0.1 volts), simulate different fault conditions: Overcurrent condition: Increase the output of the sinusoidal voltage regulator 1 so that the output current at the 0.01A-100A current output terminal 7 exceeds the protection setting threshold; Overvoltage / undervoltage conditions: Adjust the sine wave voltage regulator 1 so that the output voltage at the 250V output terminal 6 is higher than (overvoltage) or lower than (undervoltage) protection setting threshold.

[0038] Action parameter recording: When the tested protection circuit triggers an action, the closing timing module 13 or the opening timing module 14 (powered by the 5V module 12) starts timing synchronously to record the time from when the protection meets the operating condition to when the action is completed; at the same time, the voltage / current value (starting value) when the protection is activated is read through the AC voltmeter 4, AC ammeter 5 or DC voltmeter 11; then the output parameters are adjusted in reverse to record the voltage / current value (return value) when the protection is reset.

[0039] Circuit Reset: After the test is completed, press the first reset button 17 or the second reset button 18 to clear the timing module data and disconnect the instrument control button 9.

[0040] IV. Test of Opening and Closing in Air-Jet Mode This mode relies on the 25-inch female connector to achieve rapid connection with the switch under test, and completes fully automated opening and closing tests through relay SJ linkage control. The process strictly follows the component interlocking and coil control logic: Circuit start-up and interlock protection: When the aviation plug switch 19 is closed, the 12V module 2 supplies power to the relay SJ coil; at this time, the first reset button 17 (controls the closing timing module 13 to reset), the second reset button 18 (controls the opening timing module 14 to reset), and the third reset switch 20 (controls the relay SJ coil to de-energize) are in an interlocked state to prevent conflicts caused by the simultaneous operation of multiple circuits.

[0041] Automatic energy storage: After the relay SJ coil is energized, its first normally open contact closes, and the DC voltage output by the rectifier 10 is transmitted to the switch energy storage mechanism through the energy storage switch 26, driving the tested switch spring mechanism to complete energy storage; after energy storage is completed, the energy storage coil 21 is de-energized.

[0042] Automatic unlocking and closing timing: After energy storage ends, the fourth normally open contact of relay SJ closes, and the DC voltage of rectifier 10 is transmitted to the switch unlocking circuit through unlocking switch 27 to unlock the switch; after unlocking, the second normally open contact of relay SJ closes, and the DC voltage of rectifier 10 is transmitted to the switch closing coil through closing switch 15 to trigger the switch to close; at the same time, the closing timing module 13 starts to record the time from the issuance of the closing signal to the completion of the switch closing.

[0043] Automatic tripping and timing: After the switch is closed, the energy storage circuit is reconnected to complete the secondary energy storage; after the secondary energy storage is completed, the third normally open contact of the relay SJ closes, and the DC voltage of the rectifier 10 is transmitted to the switch tripping coil through the tripping switch 16 to trigger the switch to trip; at the same time, the tripping timing module 14 is started to record the time from the issuance of the tripping signal to the completion of the switch tripping.

[0044] Test Reset: After the opening and closing test is completed, press the first reset button 17, the second reset button 18, and the third reset button 20. The three switches will be linked coaxially, the relay SJ coil will be de-energized, and all normally open contacts will be opened. The data of the closing timing module 13 and the opening timing module 14 will be cleared, the aviation plug switch 19 will be disconnected, and preparation will be made for the next test.

[0045] The above description only describes the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. A gate opening and closing plug-in tester, characterized in that: The device includes a sinusoidal voltage regulator (1), a 12V module (2), a voltage transformer (3), an AC voltmeter (4), an AC ammeter (5), a 250V voltage output terminal (6), a 0.01A-100A current output terminal (7), and a current-voltage common output terminal (8). The input terminal of the sinusoidal voltage regulator (1) is electrically connected to the 12V module (2), and the output terminal of the sinusoidal voltage regulator (1) is electrically connected to the primary winding of the voltage transformer (3). The AC voltmeter (4) and the AC ammeter (5) are both electrically connected to the secondary winding of the voltage transformer (3). The secondary winding of the voltage transformer (3) is electrically connected to the 250V voltage output terminal (6), the 0.01A-100A current output terminal (7), and the current-voltage common output terminal (8).

2. The tripping and closing plug-in tester according to claim 1, characterized in that: The output terminal of the sinusoidal voltage regulator (1) is electrically connected to the primary winding of the voltage transformer (3) via the instrument control button (9).

3. The tripping and closing tester for aircraft according to claim 2, characterized in that: It also includes a rectifier (10) and a DC voltmeter (11), the input and output terminals of the sinusoidal voltage regulator (1) are electrically connected to the input terminal of the rectifier (10), and the output terminal of the rectifier (10) is electrically connected to the DC voltmeter (11).

4. The tripping and closing air-mounted tester according to claim 3, characterized in that: It also includes a 5V module (12), a closing timing module (13), a opening timing module (14), a closing switch (15), and an opening switch (16). The 5V module (12) is electrically connected to the 12V module (2). The 5V module (12) is electrically connected to the closing timing module (13) and the opening timing module (14) respectively. The closing timing module (13) is electrically connected to the closing switch (15), and the opening timing module (14) is electrically connected to the opening switch (16).

5. The tripping and closing tester for aircraft according to claim 4, characterized in that: The closing timing module (13) is grounded through the first reset button (17), and the opening timing module (14) is grounded through the second reset button (18).

6. The tripping and closing tester for aircraft according to claim 5, characterized in that: The 12V module (2) is electrically connected to a plug switch (19), and the plug switch (19) is electrically connected to the coil of a relay (SJ). The coil of the relay (SJ) is electrically connected to the 12V module (2) through a third reset switch (20).

7. The tripping and closing plug-in tester according to claim 6, characterized in that: The first reset button (17), the second reset button (18), and the third reset switch (20) are interlocked.

8. The tripping and closing plug-in tester according to claim 7, characterized in that: It also includes a relay (SJ), an energy storage coil (21), a closing coil (22), a opening coil (23), and an unlocking coil (24). The 12V module (2) is electrically connected to the first normally open contact, the second normally open contact, the third normally open contact, and the fourth normally open contact of the relay (SJ). The first normally open contact of the relay (SJ) is electrically connected to the energy storage coil (21), and the energy storage coil (21) is electrically connected to the third reset switch (20). The second normally open contact of the relay (SJ) is electrically connected to the closing coil (22), and the closing coil (22) is electrically connected to the third reset switch (20). The third normally open contact of the relay (SJ) is electrically connected to the opening coil (23), and the opening coil (23) is electrically connected to the third reset switch (20). The fourth normally open contact of the relay (SJ) is electrically connected to the unlocking coil (24), and the unlocking coil (24) is electrically connected to the third reset switch (20).

9. The tripping and closing air-mounted tester according to claim 8, characterized in that: It also includes a power connector (25), an energy storage switch (26), and an unlocking switch (27). The closing timing module (13) and the opening timing module (14) are both electrically connected to the power connector (25). The output terminal of the rectifier (10) is electrically connected to the power connector (25) through the energy storage switch (26), the unlocking switch (27), the closing switch (15), and the opening switch (16), respectively. The power connector (25) is electrically connected to the output terminal of the rectifier (10).

10. The tripping and closing tester for aircraft according to claim 9, characterized in that: The AC voltmeter (4) has an accuracy of 0.2 and a resolution of 0.1 volts and is used to display AC voltage parameters; the AC ammeter (5) has an accuracy of 0.2 and a resolution of 0.01 amps and is used to display AC current parameters; the DC voltmeter (11) has an accuracy of 0.2 and a resolution of 0.1 volts and is used to display DC voltage parameters.

Images