Low-voltage power distribution anti-misoperation structure

Abstract

The utility model discloses a low -voltage distribution anti -misoperation structure, including the mother -in -law cabinet and two -way incoming line cabinet, the mother -in -law cabinet and two -way incoming line cabinet two two combination settings have the mother -in -law cabinet closing circuit, no. 1 cabinet closing circuit and no. 2 cabinet closing circuit, the mother -in -law cabinet closing circuit, no. 1 cabinet closing circuit and no. 2 cabinet closing circuit all have the parallelly connected hot reverse joint point. The utility model has the following advantages and effect: on the basis of original secondary circuit (with three lock two keys), increase three hot reverse joint points to satisfy when the five -prevention function under the condition that the electric operation of the device or electrical secondary circuit exists defect and can not be realized. Three hot reverse joint points are closed during hot reverse operation, and three hot reverse joint points are separated after hot reverse. That is, the original circuit three lock two keys anti -misoperation function is retained, and hot reverse operation is realized.

Description

Technical Field

[0001] This utility model relates to the field of power line technology, and in particular to a structure for preventing misoperation in low-voltage power distribution. Background Technology

[0002] In a system with two incoming power lines, the function of the bus tie cabinet is to connect the main busbars of the two power sources during normal operation, forming a parallel power supply system. When one power source fails, the bus tie cabinet can disconnect the faulty power source, allowing the other power source to continue supplying power, thus ensuring the continuity and stability of the power supply. The bus tie cabinet and the two incoming line cabinets should generally not be closed simultaneously to avoid reverse power flow.

[0003] In the existing technology, when the electrical secondary circuit fails and electrical switching operations cannot be performed, manual mechanical operation is required to complete the switching operation, which cannot achieve the five-proof function under electric operation conditions. Utility Model Content

[0004] The purpose of this invention is to provide a structure for preventing misoperation in low-voltage power distribution.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a low-voltage power distribution anti-misoperation structure, including a bus tie cabinet and two incoming line cabinets, wherein the bus tie cabinet and the two incoming line cabinets are combined and arranged with a bus tie cabinet closing circuit, a first cabinet closing circuit and a second cabinet closing circuit, and hot switching points are connected in parallel on the bus tie cabinet closing circuit, the first cabinet closing circuit and the second cabinet closing circuit.

[0006] In summary, this utility model has the following beneficial effects: Based on the original secondary circuit (with three locks and two keys), three hot-swap contacts are added to meet the five-proof function in cases where the device or the electrical secondary circuit is defective and cannot achieve electric operation. During hot-swap operation, the three hot-swap contacts close; when hot-swap ends, the three hot-swap contacts separate. This retains the original circuit's three-lock, two-key anti-misoperation function while also realizing hot-swap operation. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the principle before the improvement; Figure 2 The diagram shows the improved loop connection principle, where (A) is the closing circuit diagram of the bus tie cabinet, (B) is the closing circuit diagram of the No. 1 incoming line cabinet, and (C) is the closing circuit diagram of the No. 2 incoming line cabinet. Detailed Implementation

[0008] The present invention will be further described in detail below with reference to the accompanying drawings.

[0009] The low-voltage power distribution anti-misoperation structure includes a bus tie cabinet and two incoming line cabinets.

[0010] In a system with two incoming power lines, the function of the bus tie cabinet is to connect the main busbars of the two power sources during normal operation, forming a parallel power supply system. When one power source fails, the bus tie cabinet can disconnect the faulty power source, allowing the other power source to continue supplying power, thus ensuring the continuity and stability of the power supply. The bus tie cabinet and the two incoming line cabinets should generally not be closed simultaneously to avoid reverse power flow.

[0011] In existing technologies, a three-lock, two-key structure is typically used to ensure the safety and stability of the power supply system under specific circumstances. That is, the circuit breaker can only be closed when specific conditions are met. These specific conditions are: 1. When there is pressure on both sides, the loop detection is initiated. If the pressure difference and phase difference on both sides meet the conditions, the output relay contacts close, allowing closing. Otherwise, the relay contacts open, prohibiting closing.

[0012] 2. When one end of the switch is pressurized and the other end is depressurized, and this switch is in the open position while the other two switches are in the closed position, this switch is prohibited from being closed (to prevent reverse power supply). The original open circuit breaker is only allowed to close when one of the two closed switches is in the open position. The closing circuit continuity condition is: A switch (in a split state) has two terminals, one with pressure and the other without pressure. If two of the three switches are in the open position, then the open switch is allowed to close.

[0013] In this application, the bus tie cabinet and the two incoming line cabinets are combined and set with a bus tie cabinet closing circuit, a No. 1 cabinet closing circuit and a No. 2 cabinet closing circuit, and hot switching points are connected in parallel on the bus tie cabinet closing circuit, the No. 1 cabinet closing circuit and the No. 2 cabinet closing circuit.

[0014] Based on the original secondary circuit (with three locks and two keys), three additional hot-swap contacts are added to provide five protection functions in case the device or the electrical secondary circuit is defective and cannot achieve electric operation. During hot-swap operation, the three hot-swap contacts close; when hot-swap ends, the three hot-swap contacts separate. This retains the original circuit's three-lock, two-key anti-misoperation function while also enabling hot-swap operation.

[0015] Overall, attached Figure 1 This is a schematic diagram of the existing technology. From top to bottom, the diagrams show the closing circuits of the bus tie cabinet, the No. 1 incoming line cabinet, and the No. 2 incoming line cabinet. The red dashed boxes in the diagram represent electrical anti-misoperation circuits. The upper part of the bus tie cabinet closing circuit has the No. 1 cabinet connection point above it and the No. 2 cabinet connection point below it. The middle part of the No. 1 incoming line cabinet closing circuit has the No. 2 cabinet connection point above it and the bus tie cabinet connection point below it. The lower part of the No. 2 incoming line cabinet closing circuit has the No. 2 cabinet connection point above it and the bus tie cabinet connection point below it.

[0016] Appendix Figure 2 This is a structural schematic diagram of the present application. The connection points in the diagram are related to the attached... Figure 1 The consistency is shown in the image. The green sections represent hot-swappable connection points.

[0017] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A low-voltage power distribution anti-misoperation structure, including a bus tie cabinet and two incoming line cabinets, characterized in that: The bus tie cabinet and the two incoming line cabinets are combined and equipped with a bus tie cabinet closing circuit, a No. 1 cabinet closing circuit and a No. 2 cabinet closing circuit. Hot switching points are connected in parallel on the bus tie cabinet closing circuit, the No. 1 cabinet closing circuit and the No. 2 cabinet closing circuit.

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