A power switching test device

Abstract

The utility model provides a kind of electric fast switching test device, it is related to circuit test technical field, including base shell, the lid is installed on base shell, the inside fixed mounting of base shell has L end connection electric socket one and L end connection electric socket two, the inside installation of base shell of L end connection electric socket one and L end connection electric socket two one side has coil operation type contactor, the inside installation of base shell corresponding to the side of coil operation type contactor away from L end connection electric socket two has N end connection electric socket one and N end connection electric socket two.The utility model ensures the strict synchronism of three-phase voltage operation by the synchronous control of coil operation type contactor, and the precise adjustable simulation of voltage recovery process is realized using time relay and intermediate relay delay logic, and each exclusive slide rheostat provides flexible load and voltage regulation capability, to facilitate accurate setting low voltage action value.

Description

Technical Field

[0001] This utility model relates to the field of circuit testing technology, and in particular to a test device for rapid power switching. Background Technology

[0002] The bus tie fast-switching device under test is an important product for ensuring uninterrupted power supply to medium-voltage power supply systems for high-voltage loads. The device has a built-in programmable logic, and its debugging logic verification is complex, with a cumbersome simulation process. Typically, a relay protection tester is used to simulate voltage and current signals under normal and fault conditions to verify the reliability of the operation. During debugging, various power supply conditions under different fault scenarios must be simulated. Common settings for fast-switching start-up include: low-voltage start-up, residual voltage start-up, reverse power start-up, differential protection operation start-up, manual misoperation start-up, and no-current start-up. Conditions for blocking protection devices include: current blocking, overcurrent tripping blocking, and reverse current blocking, etc. Each setting test requires simulation using a microcomputer-based relay protection tester.

[0003] Existing test equipment typically has three voltage outputs, while commonly used relay protection devices only have two sets of voltage and two sets of current signal outputs. The relay protection tester needs to simulate the power system's acquisition signals, which include two sections of incoming line voltage, two sections of incoming line current, and two sections of bus voltage. During testing, due to the complexity of the logic, the current simulation requires numerous wiring connections. It is necessary to simulate different fault states, such as voltage loss, current loss, or voltage loss with current presence. Moreover, when connecting to the cabinet, terminal plug-in is generally used. Furthermore, existing relay protection testers can only function as a voltage and current source and have not been refined for the function of the bus tie fast-switching device. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a test device for rapid power switching.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a power switching test device, comprising a base shell, a cover installed on the base shell, and an L-end power connection socket one and an L-end power connection socket two fixedly installed inside the base shell. A coil-operated contactor is installed inside the base shell on one side of the L-end power connection socket one and the L-end power connection socket two. An N-end power connection socket one and an N-end power connection socket two are installed inside the base shell on the side of the coil-operated contactor away from the L-end power connection socket two.

[0006] In a preferred embodiment, there are six L-terminal electrical connectors, and three L-terminal electrical connectors are grouped together, with one L-terminal electrical connector corresponding to each group of L-terminal electrical connectors.

[0007] In a preferred embodiment, there are twelve N-terminal electrical sockets, twelve sliding rheostats, and twelve coil-operated contactors. Each group consists of three N-terminal electrical sockets, three sliding rheostats, and three coil-operated contactors. Each pair of N-terminal electrical sockets, three sliding rheostats, and three coil-operated contactors corresponds to one pair of L-terminal electrical sockets.

[0008] In a preferred embodiment, a green indicator light and a red indicator light are installed inside the base housing on the side of the N-terminal power socket away from the coil-operated contactor. A normally closed auxiliary contactor and a normally open auxiliary contactor are respectively installed inside the base housing on the side of the green and red indicator lights. There are eight normally closed auxiliary contactors, eight green indicator lights, eight normally open auxiliary contactors, and eight red indicator lights. Each green indicator light and each red indicator light corresponds to a set of coil-operated contactors. Each normally closed auxiliary contactor corresponds to one green indicator light, and each normally open auxiliary contactor corresponds to one red indicator light.

[0009] In a preferred embodiment, a normally closed button and a normally open button are installed inside the base housing on the side of the green indicator light away from the sliding rheostat. A normally open auxiliary contactor is installed inside the base housing on the side of the normally open button. There are four normally closed buttons, four normally open buttons, and four normally open auxiliary contactors. Each normally closed button and each normally open button corresponds to a set of coil-operated contactors, and each normally open auxiliary contactor corresponds to one normally open button.

[0010] In a preferred embodiment, a time relay is installed inside the base housing corresponding to one side of the normally closed button. A normally closed contactor and a coil intermediate relay are respectively installed inside the base housings corresponding to both sides of the time relay. A locking connector is installed inside the base housing corresponding to the side of the time relay away from the normally closed button. There are four normally closed contactors, four locking connectors, four time relays, and four coil intermediate relays. Each time relay is provided with one normally closed contactor, one locking connector, and one coil intermediate relay.

[0011] In a preferred embodiment, the cover is provided with an L-end power socket one, an L-end power socket two, a normally closed button, a normally open button, a locking connector, a time relay, a green indicator light, a red indicator light, an N-end power socket two, and a through hole for a sliding rheostat.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] This invention ensures strict synchronization of three-phase voltage operation through synchronous control of coil-operated contactors. It utilizes the delay logic of time relays and intermediate relays to achieve precise and adjustable simulation of the undervoltage recovery process. Each dedicated sliding rheostat provides flexible load and voltage adjustment capabilities, facilitating accurate setting of low-voltage action values. Meanwhile, clear red and green indicator lights and manual buttons make operation intuitive and safe. The entire device effectively solves the problem of insufficient output channels in traditional relay protection testers, providing an efficient, reliable, and fully functional solution for complex electrical switching tests. Attached Figure Description

[0014] Figure 1 A schematic diagram of a power switching test device provided by this utility model.

[0015] Figure 2 This is an internal schematic diagram of a power switching test device provided by this utility model.

[0016] Figure 3 This is a circuit connection diagram of a power switching test device provided by the present invention.

[0017] Figure 4 A schematic diagram of the operating principle circuit of a power rapid switching test device provided by this utility model.

[0018] Legend:

[0019] 1. Base housing; 2. Cover; 3. L-terminal electrical socket one; 4. N-terminal electrical socket one; 5. L-terminal electrical socket two; 6. Normally closed push button; 7. Normally open push button; 8. Normally open auxiliary contactor one; 9. Normally closed contactor; 10. Locking connector; 11. Time relay; 12. Coil-type intermediate relay; 13. Normally closed auxiliary contactor; 14. Green indicator light; 15. Normally open auxiliary contactor two; 16. Red indicator light; 17. N-terminal electrical socket two; 18. Sliding rheostat; 19. Coil-operated contactor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example

[0022] like Figures 1 to 4As shown, this utility model provides a technical solution: a rapid power switching test device, including a base shell 1, a cover 2 installed on the base shell 1, and L-end power connection socket 3 and L-end power connection socket 5 fixedly installed inside the base shell 1. A coil-operated contactor 19 is installed inside the base shell 1 on one side of the L-end power connection socket 3 and L-end power connection socket 5. An N-end power connection socket 4 and an N-end power connection socket 17 are installed inside the base shell 1 on the side of the coil-operated contactor 19 away from the L-end power connection socket 5. A green indicator light 14 and a red indicator light 16 are installed inside the base shell 1 on the side of the N-end power connection socket 17 away from the coil-operated contactor 19. A normally closed auxiliary contactor 13 and a normally open auxiliary contactor 15 are respectively installed inside the base shell 1 on the side of the green indicator light 14 and the red indicator light 16. Inside the base housing 1 on the side of the green indicator light 14 away from the sliding rheostat 18, there are normally closed buttons 6 and normally open buttons 7. Inside the base housing 1 on the side of the normally open button 7, there is a normally open auxiliary contactor 8. Inside the base housing 1 on the side of the normally closed button 6 away from the green indicator light 14, there is a time relay 11. Inside the base housing 1 on both sides of the time relay 11, there are normally closed contactors 9 and coil intermediate relays 12 respectively. Inside the base housing 1 on the side of the time relay 11 away from the normally closed button 6, there is a locking connector 10. The cover 2 is provided with L-end power socket 3, L-end power socket 5, normally closed button 6, normally open button 7, locking connector 10, time relay 11, green indicator light 14, red indicator light 16, N-end power socket 17, and through holes for the sliding rheostat 18.

[0023] In the above description, the base housing 1 and the cover 2 together form a closed housing. The L-end power socket 3 and L-end power socket 5 serve as power input points, working in conjunction with the coil-operated contactor 19 to quickly connect or disconnect the main circuit via electromagnetic operation. The N-end power socket 4 and N-end power socket 17 provide a neutral line connection to ensure circuit integrity. The green indicator light 14 and red indicator light 16 are controlled by the normally closed auxiliary contactor 13 and normally open auxiliary contactor 15, respectively, to display the circuit status in real time. The normally closed button 6... The normally open button 7, together with the normally open auxiliary contactor 8, enables manual triggering and self-locking functions. The time relay 11, integrated with the normally closed contactor 9, the coil intermediate relay 12, and the locking connector 10, provides delay control and electrical interlocking to prevent misoperation. The sliding rheostat 18 allows the circuit parameters to be adjusted to simulate load changes. Through collaborative design, fast, safe, and visualized circuit switching tests are achieved, improving the reliability and efficiency of the test. At the same time, the perforation on the cover 2 facilitates external access and operation of key components.

[0024] Furthermore, there are six L-terminal electrical sockets 25, and every three L-terminal electrical sockets 25 are grouped together, with each group of L-terminal electrical sockets 25 corresponding to one L-terminal electrical socket 13; there are twelve N-terminal electrical sockets 27, sliding rheostats 18, and coil-operated contactors 19, and every three N-terminal electrical sockets 27, sliding rheostats 18, and coil-operated contactors 19 are grouped together, with every two groups of N-terminal electrical sockets 27, sliding rheostats 18, and coil-operated contactors 19 corresponding to one group of L-terminal electrical sockets 25; there are eight normally closed auxiliary contactors 13, eight green indicator lights 14, eight normally open auxiliary contactors 25, and eight red indicator lights 16, with each green indicator light 14 and red indicator light 16... Each of the following is provided: 6 corresponds to a set of coil-operated contactors 19; each normally closed auxiliary contactor 13 corresponds to a green indicator light 14; and each normally open auxiliary contactor 15 corresponds to a red indicator light 16. There are four normally closed buttons 6, four normally open buttons 7, and four normally open auxiliary contactors 8. Each normally closed button 6 and each normally open button 7 corresponds to a set of coil-operated contactors 19, and each normally open auxiliary contactor 8 corresponds to a normally open button 7. There are four normally closed contactors 9, four interlocking connectors 10, four time relays 11, and four coil-type intermediate relays 12. Each time relay 11 corresponds to one normally closed contactor 9, one interlocking connector 10, and one coil-type intermediate relay 12.

[0025] In the above description, the six L-terminal power sockets 25 are divided into two groups of three, each corresponding to one L-terminal power socket 13, forming two independent live wire input sources, providing the necessary power distribution basis for the four-way test. The core drive unit for each test is a coil-operated contactor 19, totaling twelve and divided into four groups of three, with each pair of groups corresponding to one of the aforementioned live wire input sources. This allows each test to independently switch on / off or change the main circuit by operating the contactor. Simultaneously, each test is equipped with three N-terminal power sockets 27 and three sliding rheostats 18, forming a complete circuit and allowing independent adjustment of the load parameters for each circuit to simulate different operating conditions. The status indication system provides a green indicator light 14 and a red indicator light 16 for each group of coil-operated contactors 19. The green indicator light 14 and the red indicator light 16 are directly controlled by normally closed auxiliary contactor 13 and normally open auxiliary contactor 25, respectively. The system provides real-time and intuitive display of the on / off status of each test circuit. Manual control is achieved through dedicated normally closed buttons 6 and normally open buttons 7 for each test, forming a self-locking circuit with a normally open auxiliary contactor 8, allowing the operator to independently start or reset each test. Furthermore, the high-level control and protection logic is implemented by dedicated time relays 11, normally closed contactors 9, coil intermediate relays 12, and interlocking connectors 10 for each test. Time relays 11 provide adjustable delay control, normally closed contactors 9 and coil intermediate relays 12 implement complex logic interlocking and signal relay, and interlocking connectors 10 ensure electrical safety and prevent misoperation. This design improves testing efficiency, enabling simultaneous or time-sharing of multiple sets of comparative experiments. Each test is independent, with clear status indications, independent and safe operation, and flexible load adaptability provided by the sliding rheostat 18, fully meeting the needs of complex electrical switching tests.

[0026] Furthermore, in Figure 4 In the diagram, normally closed auxiliary contactor 13 is KM1, green indicator light 14 is HG, normally open auxiliary contactor 15 is KM2, red indicator light 16 is HR, normally closed button 6 is SB1, normally open button 7 is SB2, normally open auxiliary contactor 8 is KM3, normally closed contactor 9 is KA1, time relay 11 is KT1, coil intermediate relay 12 is KA2, coil operated contactor 19 is KM4, and KT2 is an instantaneous closing time relay.

[0027] Among them, three parallel circuits are connected between the L terminal and the N terminal. In one parallel circuit, KM1, HG and sliding rheostat 18 are connected in series. In the second parallel circuit, KM2 and HR are connected in series. In the third parallel circuit, SB1, SB2, KA1, KM4 and sliding rheostat 18 are connected in series. KM3 is connected in parallel to SB2, KT1 is connected in parallel to KM4, and KT2 and KA2 are connected in parallel to KT1.

[0028] In the above description, in the first branch, the normally closed auxiliary contactor 13, the green indicator light 14, and the sliding rheostat 18 are connected in series. This ensures that under normal operating conditions, the normally closed auxiliary contactor 13 remains closed, and the green indicator light 14 illuminates, clearly indicating whether the circuit is in standby or normal operation. Simultaneously, the sliding rheostat 18 provides an adjustable load for the circuit. In the second branch, the normally open auxiliary contactor 15 and the red indicator light 16 are connected in series. When the equipment operates, the normally open auxiliary contactor 15 is engaged, illuminating the red indicator light HR16, indicating... The circuit is in operation or active state, and the switching of the green and red indicator lights directly reflects the change in circuit status. The third branch is the key control circuit, which connects normally closed button 6, normally open button 7, normally closed contactor 9, and coil-operated contactor 19 in series. When normally open button 7 is pressed, the control circuit is energized, and coil-operated contactor 19 is energized and engaged to execute the rapid switching of the main circuit. At the same time, normally open auxiliary contactor 8, which is connected in parallel across normally open button 7, engages to achieve self-locking, maintaining the continuous conduction of the control circuit. Normally closed button 6... The control circuit can be manually reset at any time. The time relay 11 connected in parallel across the coil-operated contactor 19, along with the instantaneous closing time relay and the coil-type intermediate relay 12 connected in parallel with the time relay 11, together constitute the timing logic control. The time relay 11 starts timing after the coil-operated contactor 19 is energized. The time delay characteristic of the time relay 11 can be used to control subsequent processes. The parallel combination of the instantaneous closing time relay and the coil-type intermediate relay 12 can be used to realize instantaneous triggering or intermediate logic conversion, providing support for automatic test sequences. This circuit design realizes independent start / stop, status indication, load adjustment, and programmable timing control for each test. Its effect is to ensure that the four tests can run in parallel efficiently, reliably, and without interference. The operator can monitor the status of each test in real time through the green indicator light 14 and the red indicator light 16, and make flexible manual intervention through the normally closed button 6 and the normally open button 7. The whole system has a clear structure and complete functions, which greatly improves the automation and reliability of the test.

[0029] In this embodiment, the base shell 1 and the cover 2 constitute basic protection. Internally, the six L-terminal power sockets 25 are divided into two groups and cooperate with the L-terminal power socket 13 to form two independent power inputs. Simultaneously, twelve coil-operated contactors 19, twelve N-terminal power sockets 27, and twelve sliding rheostats 18 are systematically allocated to four test channels, ensuring each channel has complete live and neutral wire connections and independent load adjustment capabilities. The core control logic is embodied in three parallel circuits between L and N. The circuit connected in series with a normally closed auxiliary contactor 13, a green indicator light 14, and a sliding rheostat 18 indicates the standby state and provides an adjustable load. The circuit connected in series with a normally open auxiliary contactor 25 and a red indicator light 16 illuminates during operation to indicate the running status. The crucial third control circuit connects a normally closed button 6, a normally open button 7, and a normally closed... Contactor 9 and coil-operated contactor 19, along with a normally open auxiliary contactor 8 connected in parallel to normally open button 7, achieve self-locking, ensuring stable switching of the main circuit after coil-operated contactor 19 is engaged. Furthermore, time relay 11 connected in parallel to coil-operated contactor 19, along with an instantaneous closing time relay connected in parallel to time relay 11 and a coil-type intermediate relay 12, together constitute a precise timing control and logic interlocking system, realizing programmable delay operation and safety protection. This design supports efficient parallel execution of four test tasks, each capable of independent operation without interference, while also providing real-time status feedback through clear green indicator lights 14 and red indicator lights 16. Combined with the flexible control of normally closed button 6 and normally open button 7 and the load simulation capability of sliding rheostat 18, it greatly improves the automation, safety, reliability, and overall efficiency of electrical switching tests.

[0030] Working principle:

[0031] like Figures 1 to 4 As shown, in the initial state, each test circuit illuminates the green indicator light 14 through its normally closed auxiliary contactor 13, indicating that the voltage is supplied normally.

[0032] When the normally open start button 7 is pressed, the current flows through the normally closed button 6, normally open button 7, and normally closed contactor 9, energizing and engaging the coil-operated contactor 19. Simultaneously, the normally open auxiliary contactor 8 connected in parallel with the normally open button 7 immediately closes to form a self-locking mechanism, ensuring that the coil-operated contactor 19 is stably connected. This allows the three-phase voltage signal of this circuit to be output normally to the load. At this time, the normally open auxiliary contactor 15, which is linked to the coil-operated contactor 19 of this circuit, engages, causing the red indicator light 16 to illuminate and the green indicator light 14 to extinguish, clearly indicating the operating status.

[0033] When simulating a voltage loss, pressing the normally closed button 6 of this circuit will manually cut off the control circuit, causing the coil-operated contactor 19 to de-energize and release, and the main circuit to be forcibly disconnected, thus simulating a fault scenario of sudden voltage interruption.

[0034] During simulated power failure recovery, the operator presses the normally open start button 7 again and engages the time relay 11 in that circuit. After the time relay 11 is energized, its momentary closed contact causes the coil intermediate relay 12 to operate. The normally closed contact of the coil intermediate relay 12 opens, temporarily preventing the coil-operated contactor 19 from engaging. After the preset delay time of the time relay 11, its delayed action contact opens, causing the coil intermediate relay 12 to de-energize and release. The normally closed contact of the coil intermediate relay 12 resets, and the coil of the coil-operated contactor 19 is then energized, restoring power to the main circuit. This accurately simulates the common delayed voltage recovery phenomenon in the power grid.

[0035] This design effectively expands the number of signal output channels by connecting two sets of externally introduced three-phase voltage signals to four independent coil-operated contactors 19 for control, thus meeting the test requirements for four sets of voltage signals. Each coil-operated contactor 19 synchronously controls the on and off of the three-phase circuit, ensuring strict synchronicity of the three-phase operation. The time relay 11 adopts a manual switching method, which can be used to simulate time-limited fault recovery, and does not affect the normal power supply of the circuit after being removed.

[0036] In addition, the sliding rheostat 18 connected in series with the coil-operated contactor 19 in each test can achieve independent and fine adjustment of the three-phase voltage of ABC. By changing the resistance value, the low-voltage operating conditions required by the fast-switching device can be easily simulated, thereby comprehensively verifying the performance of the protection equipment.

[0037] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A test device for rapid power switching, characterized in that, The device includes a base housing (1), on which a cover (2) is installed. Inside the base housing (1), an L-end power connector 1 (3) and an L-end power connector 2 (5) are fixedly installed. Inside the base housing (1) on the side of the L-end power connector 1 (3) and the L-end power connector 2 (5), a coil-operated contactor (19) is installed. Inside the base housing (1) on the side of the coil-operated contactor (19) away from the L-end power connector 2 (5), an N-end power connector 1 (4) and an N-end power connector 2 (17) are installed.

2. The power supply rapid switching test device according to claim 1, characterized in that: There are six L-terminal power connectors (5), and three L-terminal power connectors (5) are grouped together. Each group of L-terminal power connectors (5) is provided with one L-terminal power connector (3).

3. The power supply rapid switching test device according to claim 1, characterized in that: The N-terminal power connector (17), the sliding rheostat (18), and the coil-operated contactor (19) are each provided in twelve units. Every three N-terminal power connectors (17), the sliding rheostat (18), and the coil-operated contactor (19) are grouped together. Every two groups of N-terminal power connectors (17), the sliding rheostat (18), and the coil-operated contactor (19) correspond to a group of L-terminal power connectors (5).

4. The power supply rapid switching test device according to claim 1, characterized in that: A green indicator light (14) and a red indicator light (16) are installed inside the base housing (1) on the side of the N-terminal power socket (17) away from the coil-operated contactor (19). A normally closed auxiliary contactor (13) and a normally open auxiliary contactor (15) are installed inside the base housing (1) on the side of the green indicator light (14) and the red indicator light (16). There are eight normally closed auxiliary contactors (13), eight green indicator lights (14), eight normally open auxiliary contactors (15) and eight red indicator lights (16). Each green indicator light (14) and each red indicator light (16) corresponds to a set of coil-operated contactors (19). Each normally closed auxiliary contactor (13) corresponds to one green indicator light (14). Each normally open auxiliary contactor (15) corresponds to one red indicator light (16).

5. The power supply rapid switching test device according to claim 4, characterized in that: The green indicator light (14) is located on the side of the base housing (1) away from the sliding rheostat (18). Inside the base housing (1), there are normally closed buttons (6) and normally open buttons (7). Inside the base housing (1) on the side of the normally open button (7), there is a normally open auxiliary contactor (8). There are four normally closed buttons (6), four normally open buttons (7), and four normally open auxiliary contactors (8). Each normally closed button (6) and each normally open button (7) corresponds to a set of coil-operated contactors (19). Each normally open auxiliary contactor (8) corresponds to one normally open button (7).

6. The power supply rapid switching test device according to claim 5, characterized in that: A time relay (11) is installed inside the base housing (1) corresponding to one side of the normally closed button (6). A normally closed contactor (9) and a coil intermediate relay (12) are respectively installed inside the base housing (1) on both sides of the time relay (11). A locking connector (10) is installed inside the base housing (1) corresponding to the side of the time relay (11) away from the normally closed button (6). There are four normally closed contactors (9), four locking connectors (10), four time relays (11) and four coil intermediate relays (12). Each time relay (11) is provided with one normally closed contactor (9), one locking connector (10) and one coil intermediate relay (12).

7. The power supply rapid switching test device according to claim 1, characterized in that: The cover (2) is provided with L-end power socket one (3), L-end power socket two (5), normally closed button (6), normally open button (7), locking connector (10), time relay (11), green indicator light (14), red indicator light (16), N-end power socket two (17), and through hole for sliding rheostat (18).

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