Mechanical and electrical interlocking structure of high-voltage fixed cabinet
By designing a mechanical and electrical interlocking structure in a high-voltage fixed cabinet, the independence of isolation and grounding operations is achieved, and the problem of simultaneous linkage of isolation and grounding operations in the prior art is solved, and the safety of high-voltage power distribution and maintenance is improved.
Patent Information
- Application Number
- CN202420920612.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-29
AI Technical Summary
In high-voltage fixed cabinets, isolation and grounding operations are usually linked at the same time, resulting in the inability to independently complete the separation and grounding operations when the energy storage components exist, which increases safety risks.
A mechanical and electrical interlocking structure of a high-voltage fixed cabinet is designed, and the isolation and grounding operation is achieved through the JSXGN isolation upper grounding interlocking mechanism, the live display at the inlet and outlet ends, and the upper circuit breaker is superimposed on the circuit breaker, and the interlocking control is achieved through the DSN-1-Y and DSN-1-Z electromagnetic knife switch locks.
The independence of isolation and grounding operations is achieved, unnecessary grounding switch arcing is avoided, and the safety of high-voltage power distribution and maintenance is improved.
Smart Images
Figure CN222672848U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical cabinets, in particular to a mechanical and electrical interlocking structure of a high-voltage fixed cabinet. Background Art
[0002] For the 10kV high-voltage fixed metal-enclosed switchgear currently on the market, when the circuit breaker and the isolating and earthing switch are not installed in the same cabinet, the opening and closing of the isolating switch and the earthing switch are linked simultaneously, and a knife switch lock operating mechanism is used to achieve interlocking with the upper circuit breaker.
[0003] However, if there is an energy storage element at the outlet of the incoming line isolation, it is necessary to detect whether the isolated outlet is energized when closing and grounding. It is not appropriate to use a three-position isolation grounding switch with a single operating handle + electromagnetic knife switch lock to achieve interlocking. Because sometimes it is not necessary to ground at the same time when isolating and opening. In addition, when the energy storage element has not released all the energy or the energy release element is open due to a fault, opening and closing the isolation and grounding at the same time will cause the grounding switch to arc.
[0004] Therefore, the isolation and grounding operations need to be separated and the interlocking also needs to be completed independently, so a new type of mechanical and electrical interlocking structure is needed. Utility Model Content
[0005] The purpose of the embodiment of the utility model is to provide a mechanical and electrical interlocking structure of a high-voltage fixed cabinet, which separates the isolation and grounding operations and completes the interlocking independently. Therefore, this new mechanical and electrical interlocking structure is invented, and the isolation and grounding are interlocked separately.
[0006] The utility model is implemented as follows: a mechanical electrical interlocking structure of a high-voltage fixed cabinet includes: a JSXGN upper isolation and upper grounding interlocking mechanism, wherein the JSXGN upper isolation and upper grounding interlocking mechanism is used to complete upper isolation, upper grounding and opening of the corresponding high-voltage chamber door; an incoming line live indicator and an outgoing line live indicator, which are used to realize electrical interlocking auxiliary components; an upper circuit breaker, which is connected to the circuit incoming line end and is used to control the on and off of the entire circuit.
[0007] Preferably, the JSXGN upper isolation and grounding interlocking mechanism includes: an isolating switch connected between the live indicator at the incoming line end and the live indicator at the outgoing line end, a grounding switch is connected between the isolating switch and the live indicator at the outgoing line end, and the grounding switch can be closed after the isolating switch is opened.
[0008] Preferably, it also includes: DSN-1-Y electromagnetic knife switch lock, which is used to unlock the upper isolator when the upper circuit breaker is open, and the locking rod of the Y knife switch lock can be pulled out, and the corresponding knife disc is unlocked to enable the switch to be opened and closed; DSN-1-Z electromagnetic knife switch lock, which is used to pull out the locking rod of the Z knife switch lock when the isolating switch is open and the upper end of the grounding switch is not energized, and the corresponding knife disc is unlocked to enable the grounding switch to be closed.
[0009] The mechanical and electrical interlocking structure of the high-voltage fixed cabinet provided by the utility model independently separates the operation and interlocking of the isolation and earthing switches when there is an energy storage element at the isolation outlet end, solves the isolation and isolation without load, eliminates the need to close the earthing switch under power, and provides a strong guarantee for the safety of high-voltage power distribution and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a schematic diagram of the mechanical and electrical interlocking structure of the high-voltage fixed cabinet.
[0011] Figure 2 It is a partial enlarged schematic diagram of the mechanical and electrical interlocking structure of the high-voltage fixed cabinet.
[0012] In the attached figure: 1-JSXGN upper isolation and upper grounding interlocking mechanism, 2-incoming line end live display, 3-outgoing line end live display, 4-upper level circuit breaker, 5-isolating switch, 6-grounding switch, 7-DSN-1-Y electromagnetic knife switch lock, 8-DSN-1-Z electromagnetic knife switch lock. DETAILED DESCRIPTION
[0013] In order to make the purpose, technical structure and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and do not limit the utility model.
[0014] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.
[0015] See also Figure 1 The present utility model provides a mechanical and electrical interlocking structure of a high-voltage fixed cabinet, and the mechanical and electrical interlocking structure of the high-voltage fixed cabinet includes:
[0016] JSXGN upper isolation and upper grounding interlocking mechanism 1, the JSXGN upper isolation and upper grounding interlocking mechanism 1 is used to complete upper isolation, close grounding and open the corresponding high-voltage chamber door; the incoming line live display 2 and the outgoing line live display 3 are used to realize electrical interlocking auxiliary components; the upper circuit breaker 4, which is connected to the circuit incoming line end and is used to control the on and off of the entire circuit.
[0017] like Figure 1As shown, as a preferred embodiment of the utility model, the JSXGN upper isolation and grounding interlocking mechanism 1 includes: an isolating switch 5, which is connected between the live display 2 at the incoming line end and the live display 3 at the outgoing line end, and a grounding switch 6 is connected between the isolating switch 5 and the live display 3 at the outgoing line end, and the grounding switch 6 can be closed after the isolating switch 5 is opened.
[0018] like Figure 1 As shown, as a preferred embodiment of the utility model, it also includes: DSN-1-Y electromagnetic knife switch lock 7, which is used to unlock the upper isolation when the upper circuit breaker 4 is opened, and the locking rod of the Y knife switch lock can be pulled out, and the corresponding knife disc is unlocked to be able to be opened and closed; DSN-1-Z electromagnetic knife switch lock 8, which is used to pull out the locking rod of the Z knife switch lock when the disconnector 5 is opened and the upper end of the grounding switch 6 is not energized, and the corresponding knife disc is unlocked to close the grounding switch 6.
[0019] In the utility model, the JSXGN upper isolation and upper grounding interlocking mechanism 1 is completed by first separating the upper isolation, then closing the grounding, and finally opening the corresponding high-voltage room door, DSN-1-Z electromagnetic knife switch lock, and DSN-1-Y electromagnetic knife switch lock. The live display 2 at the incoming line and the live display 3 at the outgoing line are auxiliary components for realizing electrical interlocking.
[0020] DSN-1-Y electromagnetic knife switch lock 7: When the upper circuit breaker 4 is opened, the upper isolator is unlocked, the locking rod of the Y knife switch lock can be pulled out, the corresponding knife disc is unlocked, and the switch can be opened and closed.
[0021] DSN-1-Z electromagnetic knife switch lock 8: When the isolating switch 5 is opened and the upper end of the grounding switch 6 is not energized, the lock rod of the Z knife switch lock can be pulled out, the corresponding knife disc is unlocked, and the grounding switch can be closed.
[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A mechanical and electrical interlocking structure of a high-voltage fixed cabinet, including a JSXGN upper isolation and upper grounding interlocking mechanism, characterized in that: The JSXGN upper isolation and upper grounding interlocking mechanism is used to complete upper isolation, close grounding and open the corresponding high-voltage chamber door; Incoming and outgoing live indicators are used to implement electrical interlocking auxiliary components; The upper circuit breaker is connected to the incoming line terminal of the circuit and is used to control the on and off of the entire circuit.
2. The mechanical and electrical interlocking structure of the high-voltage fixed cabinet according to claim 1 is characterized in that: The JSXGN upper isolation and grounding interlocking mechanism includes: The isolating switch is connected between the live indicator at the incoming line end and the live indicator at the outgoing line end. A grounding switch is connected between the isolating switch and the live indicator at the outgoing line end. The grounding switch can be closed after the isolating switch is opened.
3. The mechanical and electrical interlocking structure of the high-voltage fixed cabinet according to claim 1 is characterized in that: Also includes: DSN-1-Y electromagnetic knife switch lock, used to unlock the upper isolation when the upper circuit breaker is open; DSN-1-Z electromagnetic knife switch lock is used when the isolating switch is open and the upper end of the grounding switch is not energized. The lock rod of the Z knife switch lock is pulled out, the corresponding knife disc is unlocked, and the grounding switch is closed.