Safety anti-misoperation circuit among multiple high-voltage switch cabinets
By designing a safety anti-misoperation circuit between multiple high-voltage switchgear, and using components such as limit switches, circuit breaker trolleys, isolating contact trolleys, and electromagnetic locks to achieve three-cabinet interlocking, the problem of the inability to achieve three-cabinet interlocking in the existing technology is solved, and the operational safety and circuit usage safety are improved.
Patent Information
- Application Number
- CN202423093777.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-16
AI Technical Summary
Existing high-voltage switchgear anti-misoperation protection devices are difficult to achieve three-cabinet interlocking, and cannot meet customers' needs for higher safety.
Design a safety anti-misoperation circuit between multiple high-voltage switchgear units. By connecting various switchgear components such as limit switches, circuit breaker trolleys, isolating contact trolleys, and electromagnetic locks, the three switchgear units can be interlocked to ensure the safety of operators.
The system implements three-cabinet interlocking to prevent operators from accidentally entering live compartments, thus improving operational safety. It also enhances the safety of circuit use through the use of fuses.
Smart Images
Figure CN223680580U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to high -voltage switchgear manufacturing technical field, concretely relates to a safe mistake prevention circuit between multiple high -voltage switchgears. BACKGROUND
[0002] Before, the design of our company has single high -voltage switch cabinet's mistake prevention device and two high -voltage switch cabinet's mistake prevention device, wherein single high -voltage switch cabinet's mistake prevention is through mistake prevention circuit to realize electrical interlocking function with power supply, locking contact, electromagnetic lock, high -voltage live sensor, controller, to ensure safety, two high -voltage switch cabinet's mistake prevention, generally book in the electrical interlocking loop between two cabinets, namely the electrical interlocking between two line-in cabinets and bus tie cabinet, bus-tie cabinet and isolation cabinet in double power supply single bus section system: when a line-in cabinet 1 loses power, can be through " spare self -throwing protection device " installed on bus-tie cabinet, the circuit breaker in bus-tie cabinet is closed, realizes two section bus load is provided by another power supply line-in cabinet 2 entirely, and through the electrical interlocking action between two cabinets, let the line load shorten the power failure time. But along with the improvement of safety consciousness, part of the customers propose higher safety requirement, hope that contact cabinet, metering cabinet, line-in cabinet three can realize interlocking (that is, realize three cabinet interlocking), for this, our company designs a kind of safe mistake prevention circuit between multiple high -voltage switchgears on the basis of our company's existing product, to meet the needs of customers. CONTENT OF UTILITY MODEL
[0003] Design purpose: to avoid the deficiency in the background art, design a kind of safe mistake prevention circuit between multiple high -voltage switchgears, including a spare supply contact cabinet travel switch, a spare supply metering cabinet travel switch, a spare supply line-in switch cabinet travel switch, a spare supply contact cabinet's isolation contact handcart, a spare supply line-in cabinet's circuit breaker handcart, a spare supply contact cabinet contact handcart, a spare supply line-in switch cabinet contact handcart, a spare supply line-in switch cabinet's switch state device, a spare supply contact cabinet's switch state indicating instrument, a spare supply contact cabinet rear door electromagnetic lock, a spare supply metering cabinet rear door electromagnetic lock and a spare supply line-in switch cabinet rear door electromagnetic lock, the connecting point in the circuit breaker handcart of spare supply line-in cabinet be electrically connected with the connecting point of one end of spare supply line-in switch cabinet travel switch through wire and the connecting point of one end of spare supply metering cabinet travel switch through wire, the connecting point of one end of spare supply contact cabinet travel switch through wire, the GBM end in small bus is electrically connected with the connecting point of one end of spare supply contact cabinet travel switch through wire;The connecting point in the circuit breaker handcart of spare supply line-in cabinet be connected with the connecting point of isolation contact handcart of spare supply contact cabinet through wire The connection point ⑥ of the isolation contact trolley for the backup contact cabinet is electrically connected to the GBM terminal in the small busbar via a wire; the connection point in the circuit breaker trolley for the backup incoming line cabinet... Connect the wires to the connection points of the standby contactor cabinet contactor trolley respectively. The connection points ② and electrical connections of the backup incoming switchgear contact trolley, wherein the connection points of the backup contactgear contact trolley... Connection point with the contact trolley of the backup incoming switchgear The connection points in the circuit breaker trolley of the backup incoming line cabinet are electrically connected to the GBMn terminal of the small busbar via wires. The wires are connected to the switch status indicators in the backup contact cabinet. The connection points of the electromagnetic lock at one end of the rear door of the backup metering cabinet and the connection points in the switch status device of the backup incoming line switch cabinet. Electrical connection, the connection point in the switch status indicator of the backup contact cabinet. The connection point in the switch status device of the backup power supply switch cabinet is electrically connected to one end of the electromagnetic lock on the rear door of the backup power supply contact cabinet via a wire. The connection points of the backup incoming switch cabinet's rear door electromagnetic lock, the backup contact cabinet's rear door electromagnetic lock, the backup metering cabinet's rear door electromagnetic lock, and the backup incoming switch cabinet's rear door electromagnetic lock are all electrically connected to the GBMn terminal of the small busbar via wires.
[0004] Preferably, it also includes a fuse located at the GBM end of the small busbar, and the backup contact cabinet limit switch and the isolating contact trolley are both electrically connected to the GBM end of the small busbar through the fuse.
[0005] Preferably, the fuse is model JF5-2.5RD / 6A, the circuit breaker trolley is model VS1-12, the switch status device and switch status indicator are model DL-7000, the backup contact cabinet limit switch, backup metering cabinet limit switch and backup incoming switch cabinet limit switch are all model LXW5-11; the backup contact cabinet rear door electromagnetic lock, backup metering cabinet rear door electromagnetic lock and backup incoming switch cabinet rear door electromagnetic lock are all model DSN-BMY.
[0006] Preferably, both the backup contact cabinet contact trolley and the backup incoming switch cabinet contact trolley include a locking electromagnet.
[0007] Compared with the prior art, the present invention has the following advantages:
[0008] Firstly, the connection point in the circuit breaker trolley of the backup incoming line cabinet. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. The connection point of the isolating contact handcart of the standby contact cabinet is electrically connected with the GBM end in the small busbar through a wire. When the isolating contact handcart in the standby contact cabinet (the auxiliary contact S8 in the test position in the virtual frame, the contact ⑥ is closed) and the circuit breaker handcart in the standby incoming line cabinet are in the test position (the auxiliary contact S8 in the test position in the real frame, the contact is closed), at this time, if the cable chamber in the standby contact cabinet is electrified, the output contact (1ZCX in the virtual frame, 1ZCX: and When the contact is closed, the rear door electromagnetic lock of the backup contact cabinet, backup metering cabinet and backup incoming line cabinet is closed, and the rear doors of the three cabinets cannot be opened, which is safe for the operator and can prevent the operator from entering the live compartment (cable chamber), that is, the safety and error prevention circuit between multiple high-voltage switch cabinets can realize three-cabinet interlocking, which greatly improves the operation safety of the operator.
[0009] Secondly, the fuse is located at the GBM end in the busbar, and the backup contact cabinet travel switch and the isolation contact handcart are electrically connected to the GBM end in the busbar through the fuse. The setting of the fuse can improve the safety and error prevention circuit between multiple high-voltage switch cabinets. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 It is a schematic diagram of a safety and error prevention circuit between multiple high-voltage switch cabinets.
[0011] Figure 2 It is a physical diagram of a switch cabinet rear door electromagnetic lock.
[0012] Figure 3 It is a physical diagram of a backup contact (isolation) cabinet.
[0013] Figure 4 It is a physical diagram of a multiple backup incoming line switch cabinet. DETAILED DESCRIPTION
[0014] Embodiment 1: refer to the attached Figures 1-4 A safety and error prevention circuit between multiple high-voltage switch cabinets, including a backup contact cabinet travel switch 1, a backup metering cabinet travel switch 2, a backup incoming line switch cabinet travel switch 3, a backup contact cabinet isolation contact handcart 4, a backup incoming line cabinet circuit breaker handcart 5, a backup contact cabinet contact handcart 6, a backup incoming line switch cabinet contact handcart 7, a backup incoming line switch cabinet switch state device 8, a backup contact cabinet switch state indicator 9, a backup contact cabinet rear door electromagnetic lock 10, a backup metering cabinet rear door electromagnetic lock 11 and a backup incoming line switch cabinet rear door electromagnetic lock 12, the connection point The connection point of the backup incoming line switch cabinet travel switch 3 at one end is electrically connected through a wire, and the connection point of the backup incoming line switch cabinet travel switch 3 at the other end is electrically connected through a wire to the connection point of the backup metering cabinet travel switch 2 at one end, the connection point of the backup metering cabinet travel switch 2 at the other end is electrically connected through a wire to the connection point of the backup contact cabinet travel switch 1 at one end, and the connection point of the backup contact cabinet travel switch 1 at the other end is electrically connected through a wire to the GBM end in the busbar; the connection point The connection point of the backup contact cabinet isolation contact handcart 4 is electrically connected through a wire The connection point (6) of the isolation contact handcart 4 of the emergency contact cabinet is electrically connected with the GBM end of the busbar through a wire; the connection point The connection point (2) of the emergency contact cabinet contact handcart 6 and the connection point (1) of the emergency contact cabinet contact handcart 7 are respectively electrically connected with the GBMn end of the busbar through a wire; the connection point The connection point (2) of the emergency contact cabinet contact handcart 6 and the connection point (1) of the emergency contact cabinet contact handcart 7 are respectively electrically connected with the GBMn end of the busbar through a wire; the connection point The connection point (2) of the emergency contact cabinet contact handcart 6 and the connection point (1) of the emergency contact cabinet contact handcart 7 are respectively electrically connected with the GBMn end of the busbar through a wire; the connection point The connection point (2) of the emergency contact cabinet contact handcart 6 and the connection point (1) of the emergency contact cabinet contact handcart 7 are respectively electrically connected with the GBMn end of the busbar through a wire; the connection point The connection point (2) of the emergency contact cabinet contact handcart 6 and the connection point (1) of the emergency contact cabinet contact handcart 7 are respectively electrically connected with the GBMn end of the busbar through a wire; the connection point The connection point (2) of the emergency contact cabinet contact handcart 6 and the connection point (1) of the emergency contact cabinet contact handcart 7 are respectively electrically connected with the GBMn end of the busbar through a wire; the connection point The connection point (2) of the emergency contact cabinet contact handcart 6 and the connection point (1) of the emergency contact cabinet contact handcart 7 are respectively electrically connected with the GBMn end of the busbar through a wire; the connection point The connection point (2) of the emergency contact cabinet contact handcart 6 and the connection point (1) of the emergency contact cabinet contact handcart 7 are respectively electrically connected with the GBMn end of the busbar through a wire; the connection point The connection point (2) of the emergency contact cabinet contact handcart 6 and the connection point (1) of the emergency contact cabinet contact handcart 7 are respectively electrically connected with the GBMn end of the busbar through a wire; the connection point
[0015] The back door (i.e. the cable chamber back door) of the three high-voltage switch cabinets, namely the backup contact cabinet, the backup metering cabinet and the backup incoming line switch cabinet, is provided with a travel switch (code: HM) and an electromagnetic lock (code: DSN) as main components of electrical interlocking.
[0016] 1. Power transmission operation: close the backup contact cabinet back door, close the backup metering cabinet back door, close the incoming line cabinet back door (at this time, the three cabinet back doors are closed, and the next operation can be performed); then, shake the isolation trolley in the backup contact cabinet to the working position, shake the backup incoming line circuit breaker trolley to the working position, close the backup incoming line circuit breaker, and the power transmission is successful (the PT trolley in the metering cabinet is not involved in the interlocking).
[0017] 2. Power cut operation: open the backup incoming line circuit breaker, shake the incoming line circuit breaker trolley to the test position, shake the incoming line contact cabinet isolation trolley to the test position, at this time, the incoming line switch is in the test position, the incoming line isolation trolley is in the test position, and the high voltage is not live, and the back door of each cabinet can be opened.
[0018] The working principle of the above interlocking circuit is as follows:
[0019] Only when the back doors of the three cabinets are closed, the locking electromagnet (Y0) on the backup contact cabinet and the backup incoming line cabinet circuit breaker trolley is powered on to start the locking function, the isolation trolley in the backup contact cabinet and the circuit breaker trolley in the backup incoming line cabinet are locked in the working position, and the closing condition of the incoming line circuit breaker is met, and the power transmission operation is performed.
[0020] When the isolation contact trolley in the backup contact cabinet (the auxiliary contact S8 contact ⑥ in the test position in the virtual frame is connected to the contact) and the circuit breaker trolley in the backup incoming line cabinet are in the test position (the auxiliary contact S8 contact in the test position in the real frame is connected to the contact), at this time, if the cable chamber in the backup contact cabinet is live, the output contact (1ZCX: in the virtual frame) of the switch state indicator (code: 1ZCX) in the backup contact cabinet is connected, at this time, the electromagnetic locks of the back doors of the backup contact cabinet, the backup metering cabinet and the backup incoming line cabinet are locked, and the back doors of the three cabinets cannot be opened, which is safe for the operator and can prevent the operator from entering the live compartment (cable chamber).
[0021] It should be understood that, although the above embodiment describes the design idea of the utility model in detail, the description is only a simple description of the design idea of the utility model, and is not a limitation of the design idea of the utility model. Any combination, addition or modification that does not exceed the design idea of the utility model falls within the protection scope of the utility model.
Claims
1. A safety anti-misoperation circuit between multiple high-voltage switch cabinets, comprising a standby contact cabinet stroke switch (1), a standby metering cabinet stroke switch (2), a standby incoming line switch cabinet stroke switch (3), a standby contact cabinet isolation contact trolley (4), a standby incoming line cabinet circuit breaker trolley (5), a standby contact cabinet contact trolley (6), a standby incoming line switch cabinet contact trolley (7), a standby incoming line switch cabinet switch state device (8), a standby contact cabinet switch state indicator (9), a standby contact cabinet rear door electromagnetic lock (10), a standby metering cabinet rear door electromagnetic lock (11), and a standby incoming line switch cabinet rear door electromagnetic lock (12), characterized in that: The connection point in the circuit breaker trolley (5) of the supply line cabinet The connection point in the circuit breaker trolley (5) of the supply line cabinet The connection point in the isolation contact trolley (4) of the supply contact cabinet The connection point in the isolation contact trolley (4) of the supply contact cabinet The connection point in the contact trolley (6) of the supply contact cabinet The connection point in the contact trolley (6) of the supply contact cabinet The connection point in the contact trolley (6) of the supply contact cabinet The connection point in the contact trolley (6) of the supply contact cabinet The connection point in the contact trolley (6) of the supply contact cabinet The connection point in the contact trolley (6) of the supply contact cabinet The connection point in the contact trolley (6) of the supply contact cabinet The connection point in the contact trolley (6) of the supply contact cabinet The connection point in the contact trolley (6) of the supply contact cabinet 2. The safety anti-misoperation circuit between multiple high-voltage switch cabinets according to claim 1, characterized in that: A fuse (13) is also included, which is located at the GBM end in the small bus, and the backup contact cabinet stroke switch (1) and the isolation contact handcart (4) are both electrically connected to the GBM end in the small bus through the fuse (13).
3. The safety and mistake prevention circuit between multiple high-voltage switch cabinets according to claim 2, characterized in that: The model of the fuse (13) is JF5-2.5RD / 6A, the model of the circuit breaker handcart (5) is VS1-12, the model of the switch state device (8) and the switch state indicator (9) is DL-7000, and the model of the backup contact cabinet stroke switch (1), the backup metering cabinet stroke switch (2), and the backup incoming switch cabinet stroke switch (3) is all LXW5-11; the model of the backup contact cabinet rear door electromagnetic lock (10), the backup metering cabinet rear door electromagnetic lock (11), and the backup incoming switch cabinet rear door electromagnetic lock (12) is all DSN-BMY.
4. The safety anti-misoperation circuit according to claim 1, characterized in that: The backup contact cabinet contact handcart (6) and the backup incoming switch cabinet contact handcart (7) both include a locking electromagnet.