Compact low-voltage dual power automatic switching box
Patent Information
- Application Number
- CN202521929471.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-08
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-08
AI Technical Summary
一些老旧配电室低压供电系统虽然是双电源供电，但是供电投切方案多为自投手复，或者手投手复，工作电源出现故障时，备用电源不能及时供电，负荷停电时间较长，影响供电及时性
本申请提供了一种紧凑型低压双电源自动切换箱，所述紧凑型低压双电源自动切换箱为整体装配的设备；本申请采用集成化的方式安装在紧凑型的壳体内，以减少现场条件对改造的影响，缩短现场改造的时间。采用接触式继电器实现两段电源快速切换，不会影响断路器分合闸输出，且自投装置不会出现失电现象，减少了检修人员的工作量，降低了维护成本。此外，采用双层端子能够减少壳体内元器件安装位置，进而减少了壳体的尺寸，节省了安装空间。由此，本申请可提高工作效率，降低维护成本。
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Figure CN224843227U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of distribution box technology, and in particular to a compact low-voltage dual-power automatic switching box. Background Technology
[0002] As economic levels continue to improve, people's requirements for power reliability are also increasing, making dual-power switching increasingly important in power systems. Although some older distribution rooms have dual-power supply systems for low voltage, the power switching schemes are mostly automatic transfer with manual reset, or manual transfer with manual reset. When the working power supply fails, the backup power supply cannot provide power in time, resulting in a long power outage time and affecting the timeliness of power supply. To improve power reliability, it is necessary to upgrade old power distribution rooms with dual-power automatic transfer switches. The conventional solution is to install low-voltage automatic transfer switches and secondary control components separately in the bus tie cabinet, using a UPS to power the low-voltage automatic transfer switches. This solution has several problems during the upgrade process: First, when installing the low-voltage automatic transfer switches and secondary control components separately, the low-voltage automatic transfer switches need to be installed on the old distribution cabinet door, which involves drilling holes in the old door or remaking the door, making installation inconvenient and greatly affected by site conditions. Second, using a UPS to power the low-voltage automatic transfer switches increases the workload of maintenance personnel and increases maintenance costs in the later stages. Third, when modifying the control circuit, components need to be brought to the site for disassembled installation and wiring, which is time-consuming, labor-intensive, inefficient, and results in long power outages for customers. Utility Model Content
[0003] The purpose of this application is to provide a compact low-voltage dual-power automatic transfer switch box that can improve work efficiency and reduce maintenance costs.
[0004] To achieve the above objectives, this application provides the following solution: In a first aspect, this application provides a compact low-voltage dual-power automatic transfer switch box, which is an integrally assembled device; the compact low-voltage dual-power automatic transfer switch box includes: an integrated automatic transfer device, a connecting piece, secondary control components, and a housing; The automatic transfer device, the connecting piece, and the secondary control component are electrically connected and are all mounted on the housing; the automatic transfer device is connected to two incoming power supplies with different set voltages. The secondary control component includes a contact relay and a double-layer terminal; the contact relay and the double-layer terminal are connected.
[0005] In one embodiment, the automatic transfer switch includes a power supply circuit and a remote signaling circuit; the power supply circuit is connected to the incoming power supply; and the remote signaling circuit is connected to the power supply circuit.
[0006] In one embodiment, the secondary control component further includes: a safety device; The fuse is electrically connected to the contact relay and the double-layer terminal.
[0007] In one embodiment, the housing includes a door panel, a rear shell, and a mounting plate; The self-operated device and the connecting piece are installed on the door panel; The contact relay, the double-layer terminal, and the fuse are mounted on the mounting plate.
[0008] In one embodiment, the automatic switching device, the connecting piece, the contact relay, the double-layer terminal, and the fuse are all electrically connected by prefabricated wiring harnesses.
[0009] In one embodiment, the contact relay has at least two normally open contacts and two normally closed contacts.
[0010] In one embodiment, the double-layer terminals are connected to two separate control loops.
[0011] In one embodiment, the housing is made of steel plate, and the outer surface of the housing is powder coated.
[0012] In one embodiment, the set voltage is a voltage with a value less than 1000V.
[0013] In one embodiment, the prefabricated wiring harness is a wiring harness determined based on the position and distance between the automatic switching device, the connecting piece, the contact relay, the double-layer terminal, and the fuse device.
[0014] According to the specific embodiments provided in this application, the following technical effects are disclosed: This application provides a compact low-voltage dual-power automatic transfer switch box, which is an integrally assembled device. This application adopts an integrated approach, installing the switch within a compact housing to reduce the impact of on-site conditions on modifications and shorten on-site modification time. It uses contact relays to achieve rapid switching between two power supplies without affecting the circuit breaker's opening and closing outputs, and the automatic transfer device does not experience power loss, reducing the workload of maintenance personnel and lowering maintenance costs. Furthermore, the use of double-layer terminals reduces the number of component installation locations within the housing, thereby reducing the housing size and saving installation space. Therefore, this application improves work efficiency and reduces maintenance costs. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 Side sectional view of a compact low-voltage dual-power automatic transfer switch box; Figure 2 Main view of a compact low-voltage dual-power automatic transfer switch box; Figure 3 Schematic diagram of a compact low-voltage dual-power automatic transfer switch enclosure; Figure 4 A schematic diagram of the installation of secondary control components in a compact low-voltage dual-power automatic transfer box; Figure 5 This is a schematic diagram of the control principle of a compact low-voltage dual-power automatic transfer switch.
[0017] Figure label: Housing-1, Automatic switching device-2, Connecting piece-3, Secondary control component-4, Prefabricated wiring harness-5, Door panel-10, Rear shell-11, Mounting plate-12, Contact relay-40, Double-layer terminal-41, Fuse device-42. Detailed Implementation
[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0019] This application provides a compact low-voltage dual-power automatic transfer switch box. Through integrated design, the entire switch box is assembled at the manufacturing plant, allowing for direct installation and wiring on-site. This improves on-site installation flexibility, shortens on-site modification time, and simultaneously increases efficiency and reduces costs.
[0020] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0021] In one exemplary embodiment, such as Figures 1-4As shown, a compact low-voltage dual-power automatic transfer switch box is provided. The compact low-voltage dual-power automatic transfer switch box is an integrally assembled device. This compact low-voltage dual-power automatic transfer switch box includes: an integrated automatic transfer device 2, a connecting piece 3, a secondary control component 4, and a housing 1; the automatic transfer device 2, the connecting piece 3, and the secondary control component 4 are electrically connected and are all mounted on the housing 1; the automatic transfer device 2 connects to two incoming power supplies with different set voltages. As an optional implementation, the set voltage is a voltage value less than 1000V.
[0022] The secondary control component 4 includes a contact relay and a double-layer terminal 41; the contact relay and the double-layer terminal 41 are connected.
[0023] The automatic transfer switch 2 includes a power supply circuit and a remote signaling circuit; the power supply circuit is connected to the incoming power supply; the remote signaling circuit is connected to the power supply circuit. The power supply circuit connects two different low-voltage incoming circuits, and the remote signaling circuit enables signal monitoring, communication, and automatic switching between the two low-voltage circuits. The remote signaling circuits are connected as follows: Figure 5 As shown.
[0024] The secondary control component 4 also includes a fuse 42; the fuse 42 is electrically connected to a contact relay and a double-layer terminal 41. The contact relay 40 has at least two normally open contacts and two normally closed contacts. The double-layer terminal 41 is connected to two separate control circuits.
[0025] The housing 1 includes a door panel 10, a rear shell 11, and a mounting plate 12; the door panel 10 is equipped with an automatic switching device 2 and a connecting piece 3; the mounting plate 12 is equipped with a contact relay 40, a double-layer terminal 41, and a fuse 42. The housing 1 is made of steel plate, and the outer surface of the housing 1 is powder coated.
[0026] The automatic switching device 2, connecting piece 3, contact relay 40, double-layer terminal 41, and fuse device 42 are all electrically connected by prefabricated wiring harness 5.
[0027] In one embodiment, the prefabricated wiring harness 5 is a connection harness determined based on the position and distance between the automatic switching device 2, the connecting piece 3, the contact relay 40, the double-layer terminal 41, and the fuse device 42.
[0028] Specifically, such as Figures 1-4 As shown, this application provides a compact low-voltage dual-power automatic switching box, including a housing 1, a low-voltage standby automatic switching device (i.e., automatic switching device) 2, a connecting piece 3, a secondary control component 4, and a prefabricated wiring harness 5. The low-voltage standby automatic switching device is embedded in the door panel 10 of the housing 1.
[0029] The contact relay 40, double-layer terminal block 41, and fuse 42 are mounted on the inner mounting plate 12 of the housing 1. The low-voltage automatic transfer switch (ATS) and secondary control components 4 are connected via prefabricated wiring harness 5. The power supply for the ATS is connected to the power supply side of the two low-voltage incoming lines (Section I and Section II), providing power to itself by switching power sources. When one of Section I or Section II is disconnected due to a fault, the power supply line automatically switches to the other section's line through the ATS, thus ensuring continuous power supply to the low-voltage busbar. When the original power supply line is restored, the ATS automatically switches back to the original line's power supply based on internal logic.
[0030] The relays in the secondary control component 4 of the low-voltage dual power supply automatic switching box are selected as contact relays 40 with at least two normally open contacts and two normally closed contacts. These relays switch in a very short time, quickly realizing the switching between the two power supplies, and will not cause the circuit breaker switches in the I and II sections to open or close.
[0031] The compact low-voltage dual-power automatic transfer switch box provided in this application has the following advantages: First, the automatic transfer device and secondary control components are integrated and installed in a compact housing. The automatic transfer device and secondary control components are connected by prefabricated wiring harnesses, which reduces the impact of site conditions on the renovation and shortens the on-site renovation time.
[0032] Secondly, the power supply side of the two low-voltage incoming lines is used to provide power to the automatic transfer device. A contact relay is used to realize the rapid switching between the two power supplies. This will not affect the circuit breaker's opening and closing output, and the automatic transfer device will not experience power loss. This reduces the workload of maintenance personnel and lowers maintenance costs.
[0033] Third, the use of double-layer terminals reduces the number of component installation positions inside the housing, thereby reducing the size of the housing and saving installation space.
[0034] Fourth, the compact low-voltage dual-power automatic transfer switch box has a small enclosure size, which can be installed either as a whole on the outside of the door panel of the low-voltage switch cabinet or as a whole inside the low-voltage switch cabinet. The installation method is flexible and reliable, avoiding a large amount of construction work on site.
[0035] like Figure 5 As shown, the low-voltage standby automatic transfer device collects the voltage values of incoming line 1, bus voltage I, incoming line 2, and bus voltage II; collects the current values of incoming line 1 and incoming line 2; collects the input quantities of switch 1DL open / closed position, switch 2DL open / closed position, switch 3DL open / closed position, standby automatic transfer connector input, and maintenance status input; and controls the output quantities of tripping and closing incoming line 1, tripping and closing incoming line 2, and tripping and closing bus tie switch.
[0036] like Figure 5As shown, when the compact low-voltage dual-power automatic transfer switch mentioned in this application is required, the electrical quantities and switching quantities such as the voltage of the 1# incoming line, the voltage of the I-section bus, the current of the 1# incoming line, the open / closed position of the 1DL switch, and the tripping / closing of the 1# incoming line switch are connected to the 1# incoming line cabinet; the electrical quantities and switching quantities such as the voltage of the 2# incoming line, the voltage of the II-section bus, the current of the 2# incoming line, the open / closed position of the 2DL switch, and the tripping / closing of the 2# incoming line switch are connected to the 2# incoming line cabinet; the open / closed position of the 3DL switch and the tripping / closing of the bus tie switch are connected to the bus tie cabinet.
[0037] like Figure 5 As shown, when the entire system is operating normally, the voltage of incoming line #1, the voltage of bus section I, the voltage of incoming line #2, and the voltage of bus tie section II are normal. 1ZK and 2ZK are in the closed position, and 3ZK is in the open position. Incoming line #1 operates with bus section I, and incoming line #2 operates with bus section II. When a system fault occurs and the voltage of incoming line #1 disappears, the automatic transfer switch (ATS) detects that the voltages of incoming line #1 and bus section I have disappeared, while the voltages of incoming line #2 and bus section II are normal. The ATS trips the relay of incoming line #1, tripping 1ZK. The ATS monitors the open / closed position of the switches in real time. When it detects that 1ZK is in the open position, it trips the relay of bus tie section II, tripping 3ZK, completing the automatic transfer of the system. At this time, incoming line #2 operates with bus section I and bus section II. When the system fault disappears, the automatic transfer switch detects that the voltage of the No. 1 incoming line has returned to normal. The automatic transfer switch trips the bus tie switch relay, and 3ZK trips. The automatic transfer switch monitors the switch open and closed positions in real time. After confirming that 3ZK is in the open position, the automatic transfer switch closes the No. 1 incoming line relay, and 1ZK closes, completing the system's self-recovery. At this time, the system returns to the operation of No. 1 incoming line with section I busbar and No. 2 incoming line with section II busbar.
[0038] like Figure 5 As shown, the system has two connection points: a standby automatic transfer connection point and a maintenance status connection point. When the standby automatic transfer connection point is on the left, the automatic transfer device cannot perform automatic transfer and reset operations, but it can be manually operated. When the standby automatic transfer connection point is on the right, the automatic transfer device can perform automatic transfer and reset operations, and can also be manually operated. When the maintenance status connection point is on the left, the automatic transfer device is out of operation and cannot be operated; when the maintenance status connection point is on the right, the automatic transfer device can be put into operation.
[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0040] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the device and its core ideas. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A compact low-voltage dual-power automatic transfer switch, characterized in that, The compact low-voltage dual-power automatic transfer switch box is an integrally assembled device; The compact low-voltage dual-power automatic transfer box includes: an integrated automatic transfer device, a connecting plate, secondary control components, and a housing; The automatic transfer device, the connecting piece, and the secondary control component are electrically connected and are all mounted on the housing; the automatic transfer device is connected to two incoming power supplies with different set voltages. The secondary control component includes a contact relay and a double-layer terminal; the contact relay and the double-layer terminal are connected.
2. The compact low-voltage dual-power automatic transfer switch box according to claim 1, characterized in that, The automatic transfer switch includes a power supply circuit and a remote signaling circuit; the power supply circuit is connected to the incoming power supply; and the remote signaling circuit is connected to the power supply circuit.
3. The compact low-voltage dual-power automatic transfer switch box according to claim 1, characterized in that, The secondary control component also includes: a safety device; The fuse is electrically connected to the contact relay and the double-layer terminal.
4. The compact low-voltage dual-power automatic transfer switch box according to claim 3, characterized in that, The housing includes a door panel, a rear panel, and a mounting plate; The self-operated device and the connecting piece are installed on the door panel; The contact relay, the double-layer terminal, and the fuse are mounted on the mounting plate.
5. The compact low-voltage dual-power automatic transfer switch box according to claim 3, characterized in that, The automatic switching device, the connecting piece, the contact relay, the double-layer terminal, and the fuse are all electrically connected by prefabricated wiring harnesses.
6. The compact low-voltage dual-power automatic transfer switch box according to claim 1, characterized in that, The contact relay has at least two normally open contacts and two normally closed contacts.
7. The compact low-voltage dual-power automatic transfer switch box according to claim 1, characterized in that, The double-layer terminals are connected to two separate control circuits.
8. The compact low-voltage dual-power automatic transfer switch box according to claim 1, characterized in that, The housing is made of steel plate, and the outer surface of the housing is powder coated.
9. The compact low-voltage dual-power automatic transfer switch box according to claim 1, characterized in that, The set voltage is a voltage value less than 1000V.
10. The compact low-voltage dual-power automatic transfer switch box according to claim 5, characterized in that, The prefabricated wiring harness is a connection harness determined based on the position and distance between the automatic switching device, the connecting piece, the contact relay, the double-layer terminal, and the fuse device.