CN212622786U - Box-type transformer with high-voltage live display - Google Patents
Box-type transformer with high-voltage live display Download PDFInfo
- Publication number
- CN212622786U CN212622786U CN202021129201.9U CN202021129201U CN212622786U CN 212622786 U CN212622786 U CN 212622786U CN 202021129201 U CN202021129201 U CN 202021129201U CN 212622786 U CN212622786 U CN 212622786U
- Authority
- CN
- China
- Prior art keywords
- grounding
- branch
- switch
- voltage
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Breakers (AREA)
Abstract
The utility model discloses a box transformer with high-voltage electricity shows, including transformer and high-voltage circuit breaker and the first branch road of connecting transformer and high-voltage circuit breaker, still parallelly connected being provided with the second branch road on the first branch road, be equipped with high-voltage electricity display and earthing device on the second branch road. Through the arrangement, when the opening and closing operation is carried out, the high-voltage electrified display checks whether a high-voltage circuit is electrified or not, and meanwhile, the high-voltage electrified display is connected with the grounding device, so that the scheme of power failure, electricity testing and grounding wire hanging is realized, the five-prevention management requirements for preventing electrified closing of the grounding knife and preventing power transmission of the grounding knife with grounding are met, convenience is brought to the power transmission stopping operation, the safety of workers is guaranteed, and the potential safety hazard is greatly reduced.
Description
Technical Field
The utility model belongs to the technical field of transformer device, specifically speaking relates to a box transformer with high-voltage live shows.
Background
Wind energy is a novel energy source with the most development prospect at present, and is a clean, pollution-free and renewable green energy source. In recent years, wind power generation has been rapidly developed nationwide, and a wind power generator is usually located relatively far from a load center to generate 690V ac power. To transport the electrical energy generated by the wind turbine over great distances, the voltage must be increased by means of a voltage-increasing device. The boosting equipment is a box-type transformer and is arranged on the ground outside the wind turbine tower, and the boosting equipment is used for boosting 690V electric energy generated by the wind driven generator into 35kV, and then transmitting the 35kV to the wind power plant boosting station through a cable or an overhead line.
The box-type transformer is formed by organically combining a transformer, high-voltage control equipment and low-voltage control equipment. The basic principle of the transformer is that reasonable assembly is carried out according to a specified sequence through a pressure starting system, an armored wire, a transformer substation full-automatic system, a direct current point and corresponding technical equipment, and all components are installed in a specific waterproof, dustproof and rat-proof completely-sealed toughened box body structure, so that the specific transformer is formed. At present, box-type transformers are widely applied to power engineering construction.
When the box-type transformer is used for power transmission and power transmission, the high-voltage circuit breaker needs to be switched on and off firstly. The high-voltage circuit breaker is a switching device which can close, bear and break current under normal loop conditions and can close, bear and break current under abnormal loop conditions within a specified time, but the high-voltage circuit breaker is likely to be accompanied by common faults such as 'refusal to open', 'refusal to close', 'error to open', 'error to close' and the like in the operation process, so that the timeliness of power cut and power transmission of a box-type transformer is influenced, and safety accidents are likely to occur.
In view of this, the present invention is proposed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in overcoming prior art's not enough, provides a box transformer with high-voltage live shows to the realization carries out the purpose of quick safe power cut and transmission operation and ground connection operation to box transformer.
In order to solve the technical problem, the utility model adopts the following basic concept:
the utility model provides a box transformer with high-voltage live shows, includes transformer and high-voltage circuit breaker and connects transformer and high-voltage circuit breaker's first branch road, still parallelly connected being provided with the second branch road on the first branch road, is equipped with high-voltage live display and earthing device on the second branch road.
Further, the high-voltage electrified display comprises an indicator lamp, a capacitor and a second grounding end, one end of the capacitor is connected to the second branch circuit, the other end of the capacitor is connected with the indicator lamp, and the other end of the indicator lamp is connected to the ground through the second grounding end.
Further, the first branch circuit comprises a first line and a second line, wherein a transformer is arranged on the first line, and a high-voltage circuit breaker is arranged on the second line;
the grounding device comprises a grounding switch and a first grounding end connected to the ground, one end of the second branch is connected with the first line, the other end of the second branch is connected with the grounding switch, and the grounding switch is arranged between the first grounding end and the second branch and used for controlling on-off.
Furthermore, an energy storage switch for controlling the connection and disconnection between the high-voltage circuit breaker and the transformer is arranged on the first branch, and the first line and the second line are respectively connected to two ends of the energy storage switch.
Furthermore, the energy storage switch comprises a first contact, a second contact and a rotatable knife switch, the first contact is connected with the second line, one end of the knife switch is connected with the first line, and the other end of the knife switch is a rotating end and is connected with the first contact or the second contact.
And one end of the third branch is connected with the second contact, and the other end of the third branch is connected with the first grounding end.
Further, the grounding switch comprises a third contact and a rotatable grounding knife switch which is contacted with or separated from the contact, the third contact is connected with the second branch circuit, and the grounding knife switch is connected with the third branch circuit;
the first grounding end is connected with the third branch or the grounding knife switch, and the first grounding end is connected with the ground and is communicated or disconnected with the second branch through the closing and opening of the grounding switch.
Further, the grounding device and the energy storage switch form a mechanical lock;
the knife switch of the energy storage switch is connected with the second contact, and the grounding knife switch of the grounding switch is switched on and connected with the third contact;
the grounding knife switch of the grounding switch is separated from the third contact, and the knife switch of the energy storage switch is connected with the first contact.
Further, one end of the first branch is a cable terminal A, the other end of the first branch is a cable terminal B, and the first branch further comprises a third line and a fourth line;
one end of the third line is connected with the cable terminal A, and the other end of the third line is connected with the transformer;
and one end of the four lines is connected with the cable terminal B, and the other end of the four lines is connected with the high-voltage circuit breaker.
Further, the energy storage switch is a spring energy storage switch.
Compared with the prior art, the utility model has the following technical progress that is showing:
1. the high-voltage live display is arranged, whether the transformer and the high-voltage circuit breaker complete the switching-on and switching-off operations is visually displayed through an indicator lamp of the high-voltage live display, whether a high-voltage circuit is live is checked, and the effect of electricity checking is achieved;
2. the energy storage switch is arranged, so that the switching-on and switching-off operations can be completed quickly, the safety of workers is guaranteed while the power-on and power-off operations are facilitated, and the potential safety hazard is greatly reduced;
3. on the basis of setting a high-voltage electrified display, the energy storage switch and the grounding device form mechanical locking, so that the scheme of power failure, electricity testing and grounding wire hanging is realized, and the five-prevention management requirement for preventing electrified connection of a grounding knife and preventing power transmission of a grounding knife switch is met.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a circuit diagram of the present invention;
fig. 2 is a circuit structure diagram of the energy storage switch of the present invention connected to the first contact;
fig. 3 is a circuit structure diagram of the energy storage switch of the present invention connected to the second contact.
In the figure: 1. an energy storage switch; 11. a first contact; 12. a second contact; 13. a knife switch; 2. a grounding device; 21. a grounding switch; 211. a third contact; 212. a grounding knife switch; 22. a first grounding end; 3. a high voltage live display; 31. an indicator light; 32. a capacitor; 33. a second grounding end; 4. a high voltage circuit breaker; 5. a transformer; 6. a first branch; 61. a first line; 62. a second line; 63. a third line; 64. a fourth line; 7. a second branch circuit; 8. a third branch; 9. a cable terminal A; 10. and a cable terminal B.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the utility model provides a box transformer with high-voltage live shows, including transformer 5 and high-voltage circuit breaker 4 and the first branch road 6 of connecting transformer 5 and high-voltage circuit breaker 4, still parallelly connected being provided with second branch road 7 on the first branch road 6, be equipped with high-voltage live display 3 and earthing device 2 on the second branch road 7.
In this embodiment, the high voltage live display 3 includes an indicator lamp 31, a capacitor 32 and a second ground terminal 33, one end of the capacitor 32 is connected to the second branch 7, the other end of the capacitor is connected to the indicator lamp 31, and the other end of the indicator lamp 31 is connected to the ground through the second ground terminal 33.
The high-voltage live display 3 checks whether a high-voltage circuit is live through a box type transformer with high-voltage live display, and after closing operation is completed, an indicator lamp 31 of the high-voltage live display 3 is turned on; after the switching-off operation is completed, the indicator lamp 31 of the high-voltage electrified display 3 is turned off, the grounding operation can be further executed, the high-voltage electrified display 3 is connected with the grounding device 2, the scheme of power failure, electricity testing and grounding wire hanging is realized, the five-prevention management requirement for preventing electrified connection of the grounding knife and preventing power transmission of the grounding knife with grounding is met, convenience is provided for the power transmission and shutdown operation, the safety of workers is guaranteed, and the potential safety hazard is greatly reduced.
Example 1
As shown in fig. 1 to 3, the present embodiment describes a box-type transformer with high voltage live display, wherein the first branch 6 comprises a first line 61 and a second line 62, the first line 61 is provided with a transformer 5, and the second line 62 is provided with a high voltage breaker 4.
As shown in fig. 1, in this embodiment, the first branch 6 is provided with the tank switch 1 for controlling connection and disconnection between the high-voltage circuit breaker 4 and the transformer 5, the first line 61 and the second line 62 are respectively connected to two ends of the tank switch 1, and the tank switch 1 controls connection and disconnection of the first branch 6, thereby realizing power cut and transmission operation of the box-type transformer.
As shown in fig. 1, in the present embodiment, the energy storage switch 1 includes a first contact 11, a second contact 12, and a rotatable blade 13, wherein the first contact 11 is connected to a second line 62, one end of the blade 13 is connected to a first line 61, and the other end is a rotating end and is connected to the first contact 11 or the second contact 12.
As shown in fig. 1, in the present embodiment, one end of the first branch 6 is a cable terminal a9, and the other end is a cable terminal B10, and the first branch 6 further includes a third line 63 and a fourth line 64, where one end of the third line 63 is connected to the cable terminal a9, and the other end is connected to the transformer 5; one end of the fourth line 64 is connected to the cable terminal B10, and the other end is connected to the high-voltage circuit breaker 4.
As shown in fig. 2, in this embodiment, the rotating end of the knife switch 13 is communicated with the first contact 11, the high-voltage circuit breaker 4 is in a closed state, the transformer 5 is communicated with the high-voltage circuit breaker 4, and the first branch 6 forms a path, at which time the box-type transformer is in a normal power transmission state.
As shown in fig. 3, in this embodiment, the rotating end of the knife switch 13 is disconnected from the first contact 11, the transformer 5 and the high-voltage circuit breaker 4 are disconnected, and the first branch 6 is disconnected, at this time, the box-type transformer is in a power failure state, and the high-voltage circuit breaker 4 can be opened.
In this embodiment, energy storage switch 1 is spring energy storage switch, and spring energy storage switch divide into two big types of electronic spring energy storage switch and manual spring energy storage switch, and wherein spring energy storage switch is energy storage switch 1's preferred switch in this application, but is not limited to spring energy storage switch, can switch the energy storage switch that plays auxiliary function to the circuit all can.
In the operation process of the high-voltage circuit breaker 4, the 'opening refusing', 'closing refusing', 'mistaken opening' and 'mistaken closing' are common faults in the operation of the high-voltage circuit breaker 4, the timeliness of power transmission and shutdown of the box-type transformer is influenced, safety accidents possibly occur, the energy storage switch 1 is additionally arranged, the opening and closing operation can be completed quickly, and potential safety hazards are reduced.
When the rotation end of the knife switch 13 of the energy storage switch 1 is connected with the first contact 11, and the high-voltage circuit breaker 4 is in a closing state, the box-type transformer normally works, the current flowing through the box-type transformer is boosted, because the current voltage on the first branch 6 is too high, the opening operation of the high-voltage circuit breaker 4 is quite difficult, and the worker uses mechanical opening and closing, the working strength is high, the opening and closing operation is quite difficult, but the energy storage switch 1 can easily complete the opening and closing operation, the closing operation is facilitated, the safety of the worker is ensured, and the potential safety hazard is greatly reduced.
Example 2
As shown in fig. 1 to fig. 3, the embodiment is a further limitation of the first embodiment, in this embodiment, the first branch 6 is connected in parallel with the second branch 7, and the grounding device 2 and the high-voltage live display 3 are disposed on the second branch 7, wherein the grounding device 2 includes a grounding switch 21 and a grounding terminal one 22 connected to the ground, one end of the second branch 7 is connected to the line one 61, the other end of the second branch is connected to the grounding switch 21, and the grounding switch 21 is disposed between the grounding terminal one 22 and the second branch 7 and is used for controlling on/off.
As shown in fig. 1, in this embodiment, one end of the second branch 7 is connected to the first line 61, the other end of the second branch is connected to the grounding switch 21, the grounding switch 21 is disposed between the first grounding end 22 and the second branch 7 and is used for controlling on/off, and current can be introduced to the ground after the grounding switch 21 is switched on, so that when a worker works, each line in the box-type transformer 5 is in an open circuit state, and safety of the worker is further ensured.
As shown in fig. 1, in the present embodiment, a third branch 8 is further included, and one end of the third branch 8 is connected to the second contact 12, and the other end is connected to the first ground terminal 22.
As shown in fig. 1, in the present embodiment, the grounding switch 21 includes a third contact 211 and a rotatable grounding blade 212 contacting with or separating from the third contact 211, the grounding blade 212 is connected to the third branch 8, and the third contact 211 is connected to the second branch 7.
As shown in fig. 1, in the present embodiment, the first ground terminal 22 is connected to the third branch 8 or the ground blade 212, and the first ground terminal 22 is connected to the ground and connected to or disconnected from the second branch 7 through the on/off of the ground switch 21.
As shown in fig. 1, in this embodiment, the second branch circuit 7 is further provided with a high-voltage live display 3 for detecting an operating voltage of the second branch circuit 7, and the high-voltage live display 3 can monitor a current on the second branch circuit 7.
In this embodiment, the grounding device 2 and the energy storage switch 1 form a mechanical lock, the grounding knife switch 212 can be switched on only when the energy storage switch 1 is switched off, and meanwhile, the energy storage switch 1 can be switched on only when the grounding knife switch 212 is at the switch-off position.
As shown in fig. 2, in the present embodiment, the grounding knife 212 of the grounding switch 21 is opened and separated from the third contact 211, the knife 13 of the energy storage switch 1 is connected to the first contact 11 of the energy storage switch 1, the first branch 6 forms a path, and the transformer 5 and the high-voltage circuit breaker 4 are communicated with each other, and at this time, the box-type transformer 5 is in a normal power transmission state.
As shown in fig. 3, in this embodiment, the rotating end of the knife-blade 13 is connected to the second contact 12 of the energy storage switch 1, that is, the rotating end of the knife-blade 13 is disconnected from the first contact 11 of the energy storage switch 1, the transformer 5 and the high-voltage circuit breaker 4 are disconnected, the grounding knife-blade 212 of the grounding switch 21 is switched on and connected to the third contact 211, and at this time, the box-type transformer 5 is in the maintenance process, the box-type transformer 5 is connected to the grounding device 2, that is, when the grounding switch 21 is switched on, the second branch 7 forms a path, and the current on the path flows into the ground.
As shown in fig. 3, in this embodiment, when the rotating end of the knife switch 13 is connected to the second contact 12 of the energy storage switch 1, the transformer 5 and the high-voltage circuit breaker 4 are disconnected, and at this time, in order to ensure the safety of the staff in the process of overhauling the box-type transformer 5, the high-voltage circuit breaker 4 can be opened, so as to further ensure the safety of the staff.
After the indicator lamp 31 of the high-voltage electrified display 3 is turned off and the grounding device 2 and the energy storage switch 1 form mechanical locking, a worker can perform the operation process more safely to realize the operation of power failure, electricity testing and ground wire hanging, and the mechanical locking meets the locking requirement of successive actions by mechanical mechanisms which are mutually restricted and linked between the operation parts of a switch cabinet or an outdoor knife switch. Mechanical shutting need not to use the auxiliary operation such as key in the operation process, can realize going on along with the operation order is right, and unblock step by step automatically can realize automatic shutting when taking place the maloperation, prevents going on of maloperation, and positive and reverse shutting requirement can be realized to mechanical shutting, has that the shutting is directly perceived, and is not fragile, and it is little to overhaul work load, advantages such as convenient operation.
Example 3
As shown in fig. 2 and 3, the embodiment is further limited to the first embodiment and the second embodiment, in this embodiment, the second branch 7 is further provided with a high-voltage live display 3 for detecting an operating voltage of the second branch 7, the high-voltage live display 3 includes an indicator lamp 31, a capacitor 32 and a second ground terminal 33, one end of the capacitor 32 is connected to the second line 62, the other end of the capacitor 32 is connected to the indicator lamp 31, and the other end of the indicator lamp 31 is connected to the ground through the second ground terminal 33.
As shown in fig. 2, in this embodiment, the rotating end of the knife switch 13 is connected to the first contact 11 of the energy storage switch 1, the high-voltage circuit breaker 4 is in a closed state, the second branch 7 forms a path, and the transformer 5 and the high-voltage circuit breaker 4 are communicated with each other, at this time, the box-type transformer 5 is in a normal power transmission state, a current flows through a line where the high-voltage live display 3 is located, and then a voltage exists at two ends of the high-voltage live display 3, and the indicator lamp 31 is on.
As shown in fig. 3, in this embodiment, the rotating end of the knife switch 13 is disconnected from the first contact 11 of the energy storage switch 1, the high-voltage circuit breaker 4 is in the open state, the second branch 7 forms the open circuit, the transformer 5 and the high-voltage circuit breaker 4 are disconnected, at this time, the box-type transformer 5 is in the power failure state, no current flows through the line where the high-voltage live display 3 is located, no voltage exists at the two ends of the high-voltage live display 3, and the indicator lamp 31 is turned off.
As shown in fig. 3, in this embodiment, the rotating end of the knife switch 13 is connected to the second contact 12 of the energy storage switch 1, and the high-voltage circuit breaker 4 is in the open state, the grounding knife switch 212 of the grounding switch 21 on the third branch 8 is closed and is connected to the third contact 211, at this time, when the box-type transformer is in the maintenance process, that is, when the grounding switch 21 is closed, the second branch 7 forms a passage, the transformer 5 is communicated with the grounding device 2, the current on the passage flows into the ground, no current flows through the line where the high-voltage live display 3 is located, no voltage exists, and the indicator lamp 31 is turned off.
In this embodiment, the high-voltage live display 3 for detecting the operating voltage of the second branch 7, preferably the 35KV high-voltage live display 3, which is disposed on the second branch 7 is suitable for indoor high-voltage electrical equipment with a rated frequency of 50Hz and a rated voltage of 35KV or less, so as to reflect the live condition of the high-voltage circuit at the location where the high-voltage live display 3 is disposed, thereby preventing the live switch and the grounding switch 21 from being turned on and turned off, preventing the false access to the live interval, and improving the anti-error performance of the switchgear.
Through observing the change of the pilot lamp 31 of high-voltage live display 3, can provide clear instruction for the staff, prevent under the high pressure condition that still exists, the staff overhauls box transformer to take place to electrocute the accident such as, test the electricity to the circuit, and guarantee to operate again after safety at testing the electricity, strictly abide by five requirements of preventing the system.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.
Claims (10)
1. The utility model provides a box transformer with high-voltage electricity shows, includes transformer and high-voltage circuit breaker and connects transformer and high-voltage circuit breaker's first branch road, its characterized in that: the first branch is also provided with a second branch in parallel, and the second branch is provided with a high-voltage live display and a grounding device.
2. The box-type transformer with high-voltage live display of claim 1, wherein: the high-voltage electrified display comprises an indicator lamp, a capacitor and a second grounding end, one end of the capacitor is connected to the second branch circuit, the other end of the capacitor is connected with the indicator lamp, and the other end of the indicator lamp is connected to the ground through the second grounding end.
3. The box-type transformer with high-voltage live display according to claim 1 or 2, characterized in that: the first branch circuit comprises a first circuit and a second circuit, wherein a transformer is arranged on the first circuit, and a high-voltage circuit breaker is arranged on the second circuit;
the grounding device comprises a grounding switch and a first grounding end connected to the ground, one end of the second branch is connected with the first line, the other end of the second branch is connected with the grounding switch, and the grounding switch is arranged between the first grounding end and the second branch and used for controlling on-off.
4. The box-type transformer with high-voltage live display of claim 3, wherein: and the first branch is provided with an energy storage switch for controlling the connection and disconnection between the high-voltage circuit breaker and the transformer, and the first line and the second line are respectively connected to two ends of the energy storage switch.
5. The box-type transformer with high-voltage live display of claim 4, wherein: the energy storage switch comprises a first contact, a second contact and a rotatable knife switch, the first contact is connected with the second line, one end of the knife switch is connected with the first line, and the other end of the knife switch is a rotating end and is connected with the first contact or the second contact.
6. The box-type transformer with high-voltage live display of claim 5, wherein: the first contact is connected with the first branch circuit, and the second contact is connected with the second branch circuit.
7. The box-type transformer with high-voltage live display of claim 6, wherein: the grounding switch comprises a third contact and a rotatable grounding knife switch which is contacted with or separated from the contact, the third contact is connected with the second branch circuit, and the grounding knife switch is connected with the third branch circuit;
the first grounding end is connected with the third branch or the grounding knife switch, and the first grounding end is connected with the ground and is communicated or disconnected with the second branch through the closing and opening of the grounding switch.
8. The box-type transformer with high-voltage live display of claim 7, wherein: the grounding device and the energy storage switch form a mechanical lock;
the knife switch of the energy storage switch is connected with the second contact, and the grounding knife switch of the grounding switch is switched on and connected with the third contact;
the grounding knife switch of the grounding switch is separated from the third contact, and the knife switch of the energy storage switch is connected with the first contact.
9. The box-type transformer with high-voltage live display of claim 3, wherein: one end of the first branch is a cable terminal A, the other end of the first branch is a cable terminal B, and the first branch further comprises a third line and a fourth line;
one end of the third line is connected with the cable terminal A, and the other end of the third line is connected with the transformer;
and one end of the four lines is connected with the cable terminal B, and the other end of the four lines is connected with the high-voltage circuit breaker.
10. The box-type transformer with high-voltage live display of claim 4, wherein: the energy storage switch is a spring energy storage switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021129201.9U CN212622786U (en) | 2020-06-17 | 2020-06-17 | Box-type transformer with high-voltage live display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021129201.9U CN212622786U (en) | 2020-06-17 | 2020-06-17 | Box-type transformer with high-voltage live display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212622786U true CN212622786U (en) | 2021-02-26 |
Family
ID=74718004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021129201.9U Expired - Fee Related CN212622786U (en) | 2020-06-17 | 2020-06-17 | Box-type transformer with high-voltage live display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212622786U (en) |
-
2020
- 2020-06-17 CN CN202021129201.9U patent/CN212622786U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112509850B (en) | Ground knife electric locking device and circuit interval with same | |
| CN103681087B (en) | Intelligence branch's demarcation vacuum circuit breaker the complete sets of equipment and guard method thereof | |
| CN212622786U (en) | Box-type transformer with high-voltage live display | |
| CN209266219U (en) | A kind of high-voltage circuitbreaker remote control trip gear | |
| CN201846012U (en) | Switching device for 24KV alternating-current metal closed ring net | |
| CN205017101U (en) | Switching -on device is divided in a distant place | |
| CN110120318B (en) | Main connecting rod tripping device of outdoor high-voltage isolating switch and uninterrupted maintenance operation method | |
| CN205123368U (en) | Portable emergent direct current charging device | |
| CN108599102A (en) | A kind of transformer neutral point ground protection switch | |
| CN209981083U (en) | Outdoor high-voltage isolating switch maintenance device without power failure | |
| CN208386124U (en) | A kind of neutral point drifting protective device | |
| CN206807126U (en) | Control of power supply system circuit and electric power system | |
| CN112878413A (en) | Start-stop control system of electric hydraulic excavator | |
| CN215986949U (en) | Hydraulic electric control device for waste incineration power generation | |
| CN214542947U (en) | Matching circuit of switching-on and switching-off monitoring loop of imported GCB control cabinet and domestic operation box | |
| CN201498986U (en) | Isolating arc extinguishing cabinet | |
| CN112164615B (en) | Electric locking circuit of bus ground knife | |
| CN211955549U (en) | No-load live debugging transmission device of low-voltage switch cabinet | |
| CN218896950U (en) | Drawer type electric power active filtering APF cabinet capable of being overhauled on line | |
| CN212935220U (en) | Medium-voltage switch cabinet for maintaining residual voltage of bus | |
| CN218549176U (en) | Bus grounding cabinet | |
| CN112086867B (en) | 500kV typical series loop HGIS electrical interlocking control loop | |
| CN209448324U (en) | The Anti-jump Circuit of Breaker of GIS combination electric appliance | |
| CN214798851U (en) | Three-phase alternating current phase sequence automatic switching and protecting device | |
| CN214069563U (en) | Novel GIS circuit breaker three-phase inconsistent protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210226 |