Feeder terminal detection device based on analog circuit breaker

Abstract

A feeder terminal detection device based on a simulation circuit breaker comprises a control unit, a simulation circuit breaker unit, a signal acquisition unit and a display unit, the control unit comprises an opening switch and a closing switch, and the simulation circuit breaker unit comprises a relay and a simulation contact. The opening switch and the closing switch are respectively connected with the simulation contact through wires, the relay is sequentially connected with the display unit and the signal acquisition unit through wires, and the signal acquisition unit is connected with the opening switch and the closing switch through wires. The simulation circuit breaker is externally connected to the feeder terminal, the control unit, the simulation circuit breaker unit, the signal acquisition unit and the display unit, so that various working states of the circuit breaker can be simulated, the performance and reliability of the feeder terminal can be tested and verified, an actual circuit breaker is not needed for testing, the cost is saved, and the detection time is greatly shortened.

Description

Technical Field

[0001] This utility model relates to the field of relay protection, specifically a feeder terminal detection device based on a simulated circuit breaker. Background Technology

[0002] Circuit breakers and feeder terminals are indispensable critical protection devices in power systems, used to quickly interrupt current in the event of short circuits, overloads, or other faults to protect the safe operation of power equipment and lines. To ensure the reliability and performance of feeder terminals, rigorous testing is required.

[0003] Traditional testing methods typically use actual circuit breakers, but this approach is costly, time-consuming, and carries certain safety risks. Therefore, developing a device or fixture capable of simulating circuit breaker operation is of significant practical importance. Utility Model Content

[0004] The purpose of this invention is to provide a feeder terminal detection device based on a simulated circuit breaker to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A feeder terminal detection device based on a simulated circuit breaker includes a control unit, a simulated circuit breaker unit, a signal acquisition unit, and a display unit. The control unit includes a tripping switch and a closing switch. The simulated circuit breaker unit includes a relay and simulated contacts. The tripping switch and the closing switch are respectively connected to the simulated contacts via wires. The relay is sequentially connected to the display unit and the signal acquisition unit via wires. The signal acquisition unit is connected to the tripping switch and the closing switch via wires.

[0007] In one possible implementation, the signal acquisition unit includes a low-pressure interface, an unstored energy interface, a split interface, and a closed interface arranged sequentially from top to bottom. The low-pressure interface, the unstored energy interface, the split interface, and the closed interface are respectively connected to the trip switch and the close switch via wires.

[0008] In one possible implementation, the display unit includes a low pressure indicator light, an out-of-energy indicator light, a split indicator light, and a closed indicator light arranged sequentially from top to bottom. The low pressure indicator light, out-of-energy indicator light, split indicator light, and closed indicator light are respectively connected to the low pressure interface, out-of-energy interface, split interface, and closed interface via wires.

[0009] In one possible implementation, a first voltage divider resistor is provided between the low pressure indicator light and the low pressure interface, a second voltage divider resistor is provided between the no-energy indicator light and the no-energy interface, a third voltage divider resistor is provided between the position indicator light and the position interface, and a fourth voltage divider resistor is provided between the position indicator light and the position interface.

[0010] In one possible implementation, a DC power interface is provided on the top of the control unit, and the DC power interface is connected to the relay via a DC double-blade contact.

[0011] In one possible implementation, the number of relays is at least two, and the relays are connected in parallel.

[0012] In one possible implementation, there are two DC double-blade contacts, one of which has a fifth voltage divider resistor between it and the relay.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] By connecting a simulated circuit breaker to the feeder terminal, the control unit, simulated circuit breaker unit, signal acquisition unit, and display unit can simulate various working states of the circuit breaker for testing and verifying the performance and reliability of the feeder terminal. This eliminates the need for actual circuit breaker testing, saving costs and significantly reducing testing time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a circuit diagram of the present invention when using two relays. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] The purpose of this invention is to connect an external device to the feeder terminal that can simulate the operation of a circuit breaker, thereby enabling the detection of the feeder terminal's status under various operating conditions without the need for a real circuit breaker for testing.

[0019] like Figure 1-2As shown, a feeder terminal detection device based on a simulated circuit breaker includes a control unit 10, a simulated circuit breaker unit 20, a signal acquisition unit 30, and a display unit. The control unit 10 includes a tripping switch 11 and a closing switch 12. The simulated circuit breaker unit 20 includes a relay 21 and a simulated contact 22. The tripping switch 11 and the closing switch 12 are respectively connected to the simulated contact 22 via wires. The relay 21 is connected to the display unit 40 and the signal acquisition unit 30 in sequence via wires. The signal acquisition unit 30 is connected to the tripping switch 11 and the closing switch 12 via wires. A DC power interface 50 is provided on the top of the control unit 10, and the DC power interface 50 is connected to the relay 21 via a DC double-pole contact CA.

[0020] Depend on Figure 1 As shown, in this utility model, the control unit 10, the analog circuit breaker unit 20, the signal acquisition unit 30, the display unit 40, and the DC power interface 50 are all mounted on a single circuit board, which serves as the substrate for supporting the aforementioned components.

[0021] Specifically, the signal acquisition unit 30 includes, from top to bottom, a low-pressure interface 31, an unstored energy interface 32, an open / closed interface 33, and a closed / closed interface 34. These interfaces are connected to the trip switch 11 and the close switch 12 via wires. The display unit 40 includes, from top to bottom, a low-pressure indicator light 41, an unstored energy indicator light 42, an open / closed indicator light 43, and a closed / closed indicator light 44. These indicators are connected to the low-pressure interface 31, the unstored energy interface 32, the open / closed interface 33, and the closed / closed interface 34 via wires.

[0022] To further protect the detection process, multiple voltage-dividing resistors are installed on the simulated circuit breaker. Specifically, a first voltage-dividing resistor R1 is installed between the low pressure indicator 41 and the low pressure interface 31; a second voltage-dividing resistor R2 is installed between the no-energy-storage indicator 42 and the no-energy-storage interface 32; a third voltage-dividing resistor R3 is installed between the open position indicator 43 and the open position interface 33; and a fourth voltage-dividing resistor R4 is installed between the closed position indicator 44 and the closed position interface 34. There are two DC double-blade contacts CA, one of which is connected to the relay 21 by a fifth voltage-dividing resistor R5.

[0023] It should be noted that in this invention, the number of relays is at least two, and the relays are connected in parallel. Different relays are connected to different test interfaces and test indicator lights; that is, in this invention, one relay can simulate and verify a specific test item. The test items performed by different relays do not interfere with each other.

[0024] The working principle of this utility model is as follows:

[0025] a. Select the appropriate circuit breaker model for simulation control based on the required conditions, such as no energy storage or low gas pressure;

[0026] b. The signal acquisition unit receives external signals through its signal interface and sends them to the control unit. The control unit contains a processor, which analyzes the external signals and performs opening and closing operations according to a preset program. The preset program is a commonly used detection program in the circuit breaker field.

[0027] c. Simulate the simulated contacts and relays of the circuit breaker unit, simulate the opening and closing process of the actual circuit breaker, and simulate the mechanical operation of the operating mechanism;

[0028] d. The signal acquisition unit acquires the operating status signal of the analog circuit breaker unit 20 in real time and feeds it back to the control unit;

[0029] e. The control unit adjusts the working status of the device according to the feedback signal, and displays the circuit breaker's open, closed, and energy storage position status in real time through the display unit.

[0030] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", "left and right", "front and back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An analog circuit breaker based feeder terminal detection apparatus, characterized by, The device includes a control unit (10), a simulated circuit breaker unit (20), a signal acquisition unit (30), and a display unit (40). The control unit (10) includes a trip switch (11) and a closing switch (12). The simulated circuit breaker unit (20) includes a relay (21) and a simulated contact (22). The trip switch (11) and the closing switch (12) are respectively connected to the simulated contact (22) via wires. The relay (21) is connected to the display unit (40) and the signal acquisition unit (30) in sequence via wires. The signal acquisition unit (30) is connected to the trip switch (11) and the closing switch (12) via wires. The signal acquisition unit (30) includes a low-pressure interface (31), an unstored energy interface (32), a split interface (33), and a closed interface (34) arranged sequentially from top to bottom. The low-pressure interface (31), the unstored energy interface (32), the split interface (33), and the closed interface (34) are respectively connected to the trip switch (11) and the close switch (12) via wires.

2. The feeder terminal detection device based on a simulated circuit breaker according to claim 1, characterized in that, The display unit (40) includes a low pressure indicator light (41), an out-of-energy indicator light (42), a split indicator light (43), and a closed indicator light (44) arranged sequentially from top to bottom. The low pressure indicator light (41), the out-of-energy indicator light (42), the split indicator light (43), and the closed indicator light (44) are respectively connected to the low pressure interface (31), the out-of-energy interface (32), the split interface (33), and the closed interface (34) via wires.

3. The analog circuit breaker based feeder terminal detection apparatus of claim 2, wherein, A first voltage divider resistor (R1) is provided between the low pressure indicator light (41) and the low pressure interface (31), a second voltage divider resistor (R2) is provided between the no-energy indicator light (42) and the no-energy interface (32), a third voltage divider resistor (R3) is provided between the position indicator light (43) and the position interface (33), and a fourth voltage divider resistor (R4) is provided between the position indicator light (44) and the position interface (34).

4. The feeder terminal detection device based on a simulated circuit breaker according to claim 1, characterized in that, The control unit (10) is provided with a DC power interface (50) on top, and the DC power interface (50) is connected to the relay (21) through a DC double-blade contact (CA).

5. The feeder terminal detection device based on a simulated circuit breaker according to claim 1, characterized in that, The number of relays (21) is at least two, and each relay (21) is connected in parallel.

6. The feeder terminal detection device based on a simulated circuit breaker according to claim 4, characterized in that, There are two DC double-blade contacts (CA), and a fifth voltage divider resistor (R5) is provided between one of the DC double-blade contacts (CA) and the relay (21).

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