Lightweight relay protection tester

Abstract

The utility model belongs to the relay protection technical field, concretely relates to a light -duty relay protection tester, 220V power socket and 220V power switch electric connection are used for access and control power supply, 220V power switch and AC voltage regulator electric connection, AC voltage regulator and control switch electric connection, AC voltage regulator passes through mutual inductor respectively 250V voltage output end, 0.01A 100A current output end and current voltage common output end electric connection, 0.01A 100A current output end and mutual inductor between electric connection have reclosing current output end, 250V voltage output end and current voltage common output end between electric connection have AC voltmeter, current voltage common output end electric connection has alternating -current ammeter. The utility model not only has reduced equipment size significantly, has promoted portability, still has passed accurate electric meter measurement and flexible switch -over, has simplified test wiring process, has reduced operation complexity, has guaranteed test accuracy simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of relay protection technology, specifically relating to a lightweight relay protection tester. Background Technology

[0002] Currently, in the commissioning, inspection, and maintenance of power system relay protection devices, it is necessary to use relay protection testers to test the electrical performance and operating characteristics of various components such as switchgear, instrument transformers, and protective relays. Existing relay protection testing equipment has the following problems: On the one hand, traditional testing instruments are often bulky and heavy, making them inconvenient to move and carry, especially when used in the field or in confined spaces, where their flexibility is poor, increasing the difficulty of operation and labor intensity for staff.

[0003] On the other hand, the existing equipment has a low degree of functional integration. If multiple test items need to be completed (such as voltage output test, current output test, switch opening and closing characteristic test, reclosing test, etc.), multiple devices usually need to be used together, which makes the operation process cumbersome and the testing efficiency low. At the same time, the measurement accuracy of some testers is insufficient, and the display resolution of parameters such as voltage and current is low, making it difficult to meet the requirements of high-precision testing.

[0004] In addition, the interface design of existing equipment is not standardized enough, the connection of external components is complicated, and there is a lack of targeted switching control mechanisms. When performing different types of tests such as DC power output and AC power operation, it is necessary to frequently change the wiring, which is not only time-consuming and laborious, but also prone to test errors or equipment damage due to wiring errors.

[0005] Therefore, there is an urgent need for a lightweight relay protection tester that is highly integrated, compact, easy to operate, and has high testing accuracy, in order to solve the above-mentioned problems in the existing technology. Utility Model Content

[0006] To address the technical problems of existing relay protection testing equipment, this utility model provides a lightweight relay protection tester that is highly integrated, compact, easy to operate, and has high testing accuracy.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A lightweight relay protection tester includes a 220V power socket, a 220V power switch, a 250V voltage output terminal, a 0.01A-100A current output terminal, a current-voltage common output terminal, a reclosing current output terminal, an AC voltmeter, an AC ammeter, an AC voltage regulator, and a control switch. The 220V power socket is electrically connected to the 220V power switch for connecting and controlling power supply. The 220V power switch is electrically connected to the AC voltage regulator, which is also electrically connected to the control switch. The AC voltage regulator is electrically connected to the 250V voltage output terminal, the 0.01A-100A current output terminal, and the current-voltage common output terminal via a current transformer. The 0.01A-100A current output terminal is electrically connected to the current transformer via a reclosing current output terminal. The 250V voltage output terminal is electrically connected to the current-voltage common output terminal via an AC voltmeter, and the current-voltage common output terminal is electrically connected to an AC ammeter.

[0008] It also includes a normally open contact of the DC power supply, an open contact, a negative terminal of the DC power supply, a DC voltmeter, and a DC output switching switch. The 220V power socket, the 250V voltage output terminal, and the common current and voltage output terminal are all electrically connected to the DC output switching switch. The DC output switching switch is electrically connected to the normally open contact of the DC power supply and the negative terminal of the DC power supply through a rectifier. A DC voltmeter is electrically connected between the normally open contact of the DC power supply and the negative terminal of the DC power supply. A closing switch and a opening switch are electrically connected between the normally open contact of the DC power supply and the open contact.

[0009] It also includes an AC power operation input normally open contact and an input contact, wherein a closing switch and a opening switch are electrically connected between the AC power operation input normally open contact and the input contact.

[0010] It also includes the contact points of the circuit breaker under test, and the contact points of the circuit breaker under test are electrically connected to the contact points by switch contacts.

[0011] The 220V power socket is electrically connected to a 5V module. The 5V module is electrically connected to a transfer switch II. The transfer switch II is electrically connected to a bus charging coil, which is electrically connected to the 5V module. The 5V module is electrically connected to a first transfer switch I, a second transfer switch I, a third transfer switch I, and a fourth transfer switch I. The first transfer switch I is electrically connected to a closing coil, which is electrically connected to the 5V module. The second transfer switch I is electrically connected to a opening coil, which is electrically connected to the 5V module. The third transfer switch I is electrically connected to a reclosing coil, which is electrically connected to the 5V module. The fourth transfer switch I is electrically connected to a post-acceleration coil, which is electrically connected to the 5V module.

[0012] The circuit breaker under test has its contact points electrically connected to the closing coil, opening coil, reclosing coil, and post-acceleration coil, respectively.

[0013] The 5V module is electrically connected to a timing module, which is electrically connected to a closing switch, a tripping switch, a reclosing switch, and a post-acceleration switch. The closing switch, tripping switch, reclosing switch, and post-acceleration switch are all electrically connected to the timing module via a reset button.

[0014] Compared with the prior art, the advantages of this utility model are: This utility model integrates a 220V power module, voltage and current output terminals, AC / DC meters, voltage regulators, and multiple sets of control switches and contacts to achieve integrated testing functions for relay protection components, including voltage output, current output, switch opening and closing, reclosing, post-acceleration, and bus charging. This not only significantly reduces the size of the equipment and improves portability, but also simplifies the testing wiring process and reduces operational complexity through precise meter measurements and flexible switch switching, while ensuring testing accuracy. It enables efficient commissioning, inspection, and maintenance of relay protection devices, effectively solving the problems of large size, fragmented functions, and cumbersome operation associated with traditional equipment. Attached Figure Description

[0015] 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.

[0016] 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.

[0017] Figure 1 This is the AC main circuit diagram of this utility model; Figure 2 This is a circuit diagram of the DC output circuit of this utility model; Figure 3 This is a circuit diagram of the AC power supply operation input circuit of this utility model; Figure 4 This is a circuit diagram showing the connection of the switch contact points of this utility model; Figure 5 This is the circuit diagram of the 5V module of this utility model; Figure 6 This is a circuit diagram of the protection action coil control circuit of this utility model; Figure 7 This is the circuit diagram of the timing and reset control circuit of this utility model.

[0018] Wherein: 1 is a 220V power socket, 2 is a 220V power switch, 3 is a 250V voltage output terminal, 4 is a 0.01A-100A current output terminal, 5 is a common current and voltage output terminal, 6 is a reclosing current output terminal, 7 is a normally open DC power supply contact, 8 is an open contact, 9 is the negative terminal of the DC power supply, 10 is a normally open AC power supply operation input contact, 11 is an input contact, 12 is the contact of the circuit breaker under test, 13 is a contact contact, 14 is an AC voltmeter, 15 is an AC ammeter, 16 is a DC voltmeter, 17 is a timing module, 18 is an AC voltage regulator, 19.1 is the first changeover switch I, 19.2 is the second changeover switch I, 19.3 is the third changeover switch I, 19.4 is the fourth changeover switch I, 20 is a changeover switch II, 21 is a DC output switching switch, 22 is a control switch, and 23 is a reset button. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] This embodiment provides a lightweight relay protection tester, such as... Figure 1 As shown, the system includes a 220V power socket 1, a 220V power switch 2, a 250V voltage output terminal 3, a 0.01A-100A current output terminal 4, a current-voltage common output terminal 5, a reclosing current output terminal 6, an AC voltmeter 14, an AC ammeter 15, an AC voltage regulator 18, and a control switch 22. When an external 220V power supply is connected to the 220V power socket 1 and the 220V power switch 2 is closed, the current, after being regulated by the AC voltage regulator 18, supplies power to the 250V voltage output terminal 3, the 0.01A-100A current output terminal 4, and the current-voltage common output terminal 5 via a current transformer. The reclosing current output terminal 6 draws power from the 0.01A-100A current output terminal 4 and the current transformer. The AC voltmeter 14 monitors the voltage between the 250V voltage output terminal 3 and the current-voltage common output terminal 5, and the AC ammeter 15 monitors the current at the current-voltage common output terminal 5. The control switch 22 controls the AC voltage regulator 18 to regulate the voltage and current output.

[0024] Furthermore, such as Figure 2 As shown, the electrical signals from the 220V power socket 1, the 250V voltage output terminal 3, and the common current and voltage output terminal 5 are connected to the DC output switching switch 21. After being converted to DC by the rectifier, they are output to the normally open contact 7 and the negative terminal 9 of the DC power supply. The DC voltmeter 16 monitors the voltage between the normally open contact 7 and the negative terminal 9 of the DC power supply. By controlling the opening and closing of the DC output through the closing and opening switches between the normally open contact 7 and the open contact 8 of the DC power supply, the corresponding test can be achieved.

[0025] Furthermore, such as Figure 3 As shown, when operating with AC power, the external AC signal is connected to the normally open AC power operation input contact 10 and input contact 11. By switching the closing and opening switches between the two, the AC control circuit is controlled, and relevant action tests are completed in conjunction with external test components.

[0026] Furthermore, such as Figure 4As shown, the contacts of the external switch are connected between contact 12 and contact 13 of the circuit breaker under test. The switch action signal is transmitted through the on / off state of the switch contacts to monitor the opening and closing status of the switch.

[0027] Furthermore, such as Figure 5 , Figure 6 As shown, the 220V power socket 1 supplies power to the 5V module. The electrical signal output by the 5V module controls the operation of the bus charging coil via transfer switch II 20, and simultaneously controls the operation of the closing coil, opening coil, reclosing coil, and post-acceleration coil via the first transfer switch I 19.1, the second transfer switch I 19.2, the third transfer switch I 19.3, and the fourth transfer switch I 19.4, respectively. The common terminal of each coil is connected to the negative terminal of the 5V module. The contact points 12 and 13 of the circuit breaker under test are connected to the closing coil, opening coil, reclosing coil, and post-acceleration coil, respectively. When the coil operates, it triggers a change in the state of the switch contact points, realizing the linkage monitoring between the coil operation and the switch contact state.

[0028] Furthermore, such as Figure 7 As shown, the 5V module supplies power to the timing module 17. The timing module 17 monitors the action signals of the switch closing, opening, reclosing, and acceleration after the switch is activated, and starts timing accordingly. When the switch is activated, the timing stops. Pressing the reset button 23 resets the timing module 17 to zero, waiting for the next timing command.

[0029] 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 lightweight relay protection tester, characterized in that: Includes a 220V power socket (1), a 220V power switch (2), a 250V voltage output terminal (3), a 0.01A-100A current output terminal (4), a current and voltage common output terminal (5), a reclosing current output terminal (6), an AC voltmeter (14), an AC ammeter (15), an AC voltage regulator (18), and a control switch (22); the 220V power socket (1) is electrically connected to the 220V power switch (2) for connecting and controlling power supply; the 220V power switch (2) is electrically connected to the AC voltage regulator (18), the AC voltage regulator (14) is electrically connected to the AC voltage regulator (15), the AC voltage regulator (16) is electrically connected to the AC voltage regulator (17), the AC voltage regulator (18) is electrically connected to the AC voltage regulator (18), the AC voltage regulator (19) is electrically connected to the AC voltage regulator (10 ... 8) Electrically connected to the control switch (22), the AC voltage regulator (18) is electrically connected to the 250V voltage output terminal (3), the 0.01A-100A current output terminal (4) and the current and voltage common output terminal (5) respectively through the current transformer; the 0.01A-100A current output terminal (4) is electrically connected to the current transformer to the reclosing current output terminal (6), the 250V voltage output terminal (3) is electrically connected to the current and voltage common output terminal (5) to the AC voltmeter (14), and the current and voltage common output terminal (5) is electrically connected to the AC ammeter (15).

2. The lightweight relay protection tester according to claim 1, characterized in that: It also includes a normally open DC power supply contact (7), an open contact (8), a negative DC power supply terminal (9), a DC voltmeter (16), and a DC output switching switch (21). The 220V power socket (1), the 250V voltage output terminal (3), and the current and voltage common output terminal (5) are all electrically connected to the DC output switching switch (21). The DC output switching switch (21) is electrically connected to the normally open DC power supply contact (7) and the negative DC power supply terminal (9) through a rectifier. The normally open DC power supply contact (7) and the negative DC power supply terminal (9) are electrically connected to the DC voltmeter (16). The normally open DC power supply contact (7) and the open contact (8) are electrically connected to a closing switch and a tripping switch.

3. The lightweight relay protection tester according to claim 2, characterized in that: It also includes an AC power operation input normally open contact (10) and an input contact (11), and the AC power operation input normally open contact (10) and the input contact (11) are electrically connected by a closing switch and a opening switch.

4. The lightweight relay protection tester according to claim 3, characterized in that: It also includes the circuit breaker under test contact point (12) and contact point (13), and the circuit breaker under test contact point (12) and contact point (13) are electrically connected by a switch contact.

5. A lightweight relay protection tester according to claim 4, characterized in that: The 220V power socket (1) is electrically connected to a 5V module. The 5V module is electrically connected to a changeover switch II (20). The changeover switch II (20) is electrically connected to a female charging coil. The female charging coil is electrically connected to the 5V module. The 5V module is electrically connected to a first changeover switch I (19.1), a second changeover switch I (19.2), a third changeover switch I (19.3), and a fourth changeover switch I (19.4). The first changeover switch I (19.1) is electrically connected to a closing coil. The closing coil is electrically connected to the 5V module. The second changeover switch I (19.2) is electrically connected to a opening coil. The opening coil is electrically connected to the 5V module. The third changeover switch I (19.3) is electrically connected to a reclosing coil. The reclosing coil is electrically connected to the 5V module. The fourth changeover switch I (19.4) is electrically connected to a rear acceleration coil. The rear acceleration coil is electrically connected to the 5V module.

6. A lightweight relay protection tester according to claim 5, characterized in that: The contact points (12) and (13) of the circuit breaker under test are electrically connected to the closing coil, the opening coil, the reclosing coil and the post-acceleration coil, respectively.

7. A lightweight relay protection tester according to claim 6, characterized in that: The 5V module is electrically connected to a timing module (17). The timing module (17) is electrically connected to a closing switch, a tripping switch, a reclosing switch, and a accelerator switch. The closing switch, tripping switch, reclosing switch, and accelerator switch are all electrically connected to the timing module (17) via a reset button (23).

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