CN218678408U - Protection device for low-current grounding line selection of alternating current power supply and distribution system - Google Patents
Protection device for low-current grounding line selection of alternating current power supply and distribution system Download PDFInfo
- Publication number
- CN218678408U CN218678408U CN202222495159.8U CN202222495159U CN218678408U CN 218678408 U CN218678408 U CN 218678408U CN 202222495159 U CN202222495159 U CN 202222495159U CN 218678408 U CN218678408 U CN 218678408U
- Authority
- CN
- China
- Prior art keywords
- current
- zero sequence
- power supply
- distribution system
- protection device
- 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.)
- Active
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to the technical field of power equipment, and a protection device that exchanges power supply distribution system undercurrent ground connection route selection is disclosed, including device main part and the real-time digital display of zero sequence current, its characterized in that, the real-time digital display of zero sequence current sets up in the front side surface of device main part, the front side of device main part and the downside that is located the real-time digital display of zero sequence current are provided with the operation and overflow the pilot lamp, the surface of device main part and the downside that is located the operation and overflows the pilot lamp are provided with the setting and reset button, the lower surface of device main part has set gradually zero sequence current sampling terminal, has overflowed output terminal and device power supply terminal from a left side to the right side. The utility model discloses the ground connection that elects that can be effective quick to possess zero sequence real-time current demonstration, reset on line, fault signal display function, reduce the segmentation and have a power failure and cause be difficult to fix a position single-phase ground connection problem, reduce the power failure and influence production, improve the stability of AC power supply distribution system.
Description
Technical Field
The utility model relates to a power equipment technical field especially relates to a protection device of alternating current power supply and distribution system undercurrent ground connection route selection.
Background
In the production process of the mine, all processes are continuous operation, and all links are connected in a ring-by-ring manner, so that the process is compact and ordered. The stable operation of a power transformation and distribution system is particularly important because all production processes can not be supported by electric energy. Due to the fact that the production environment is severe, overhead lines are widely laid, the running condition of electric equipment is complex, and lightning strikes and human factors can damage the lines to cause the metallic grounding phenomenon.
The south mountain transformer substation is a 6kV ungrounded system, a single-phase grounding phenomenon is easy to occur in humid and rainy weather, line voltages among three phases are still symmetrical and do not damage the symmetry of the line voltages of the system, the balance of a three-phase system is not damaged, and power supply of load equipment is not influenced, so that equipment in the system is allowed to run for a short time, continuous power supply of the equipment is not influenced, but one phase is grounded, so that the ground voltage of other two phases is increased to be multiple times of the phase voltage, so that insulation of the equipment is threatened, if the ground voltage is not timely processed, insulation damage, two-phase short circuit and arc discharge can be developed, the overvoltage of the system is caused, and when the single-phase grounding condition occurs, operators can position a problem line by cutting off power in sections according to experience and disconnecting suspicious lines one by one after another until the grounding phenomenon disappears. Not only wastes time and labor, but also causes large-area power failure to influence production.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can seek out the ground connection circuit fast when presenting out the circuit and taking place single-phase ground phenomenon for solving transformer substation alternating current power supply distribution system, can be effective quick select the ground connection circuit to possess zero sequence real-time current demonstration, reset on line, fault signal display function, reduce the segmentation and have a power failure and cause be difficult to fix a position single-phase ground connection circuit problem, reduce the power failure and influence production, improve alternating current power supply distribution system stability, and the protection device of a alternating current power supply distribution system undercurrent ground connection route selection that provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a protection device of alternating current power supply and distribution system undercurrent ground connection route selection, includes device main part and the real-time digital display of zero sequence current, its characterized in that, the real-time digital display of zero sequence current sets up in the front side surface of device main part, the front side of device main part just is located the downside of the real-time digital display of zero sequence current and is provided with the operation and overflows the pilot lamp, the surface of device main part just is located the operation and overflows the downside of pilot lamp and be provided with the reset button of settlement, the lower surface of device main part has set gradually zero sequence current sampling terminal, has overflowed output terminal and device power supply terminal from a left side to the right side, the rear side of device main part is provided with wiring structure.
Preferably, the wiring structure includes an ac feed-out cable and a zero sequence current transformer, the ac feed-out cable is disposed at a rear side of the apparatus main body, the zero sequence current transformer is sleeved outside the ac feed-out cable, a current transformer is disposed at one side of the ac feed-out cable, the current transformer is electrically connected to the zero sequence current transformer, a current detection device is disposed at one side of the current transformer away from the zero sequence current transformer, a comprehensive protection device is disposed at one side of the current detection device, a signal input end and a signal output end are disposed at two ends of the current detection device respectively, the signal input end is electrically connected to the current transformer, and the signal output end is electrically connected to the comprehensive protection device.
Preferably, the alternating current feed-out cable is a 6kV cable.
Preferably, the zero sequence current transformer is in the shape of two mutually-balanced semicircular rings.
Preferably, the surface of the setting and resetting button is provided with an indication mark.
Preferably, the surface of the ac feed-out cable is provided with a wear-resistant coating.
Preferably, a wireless signal transceiver module is disposed inside the device body.
Preferably, the operation overcurrent indicating lamp is a high-brightness LED lamp.
Preferably, the zero sequence current real-time digital display panel is made of polycarbonate.
Compared with the prior art, the utility model provides a protection device of exchanging power supply and distribution system undercurrent ground connection route selection possesses following beneficial effect:
1. the protection device for low-current grounding line selection of the alternating current power supply and distribution system distinguishes a grounding line through the state indication of the comprehensive protection device, so that accidents caused by long-time grounding of a power supply system are avoided;
2. the protection device for the low-current grounding line selection of the alternating-current power supply and distribution system can rapidly recover work and improve the work efficiency through the device reset key. After the fault is eliminated, the device is powered off and restarted through the reset button, and the protection device can be put into use again.
The part that does not relate to among the device all is the same with prior art or can adopt prior art to realize, the utility model discloses can be effective quick select the ground connection circuit to possess zero sequence real-time current demonstration, reset on line, fault signal display function, reduce the segmentation and have a power failure and cause be difficult to fix a position single-phase ground connection circuit problem, reduce the power failure and influence production, improve alternating current power supply distribution system stability.
Drawings
Fig. 1 is a schematic structural diagram of a protection device for low-current grounding line selection in an ac power supply and distribution system according to the present invention;
fig. 2 is a schematic wiring diagram of a protection device for low current grounding line selection in an ac power supply and distribution system according to the present invention;
FIG. 3 is a system diagram of a protection device for low current grounding line selection of an AC power supply and distribution system according to the present invention
In the figure: the device comprises a zero sequence current real-time digital display device 1, an overcurrent indicator lamp 2, a reset button 3, a zero sequence current sampling terminal 4, an overcurrent output terminal 5, a device power supply terminal 6, a device main body 7, an alternating current feed-out cable 8, a zero sequence current transformer 9, a current transformer 10, a signal input end 11, a current detection device 12, a signal output end 13 and a comprehensive protection device 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "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 simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Example one
Referring to fig. 1-2, a protection device for low current grounding line selection of an alternating current power supply and distribution system comprises a device main body 7 and a zero sequence current real-time digital display 1, and is characterized in that the zero sequence current real-time digital display 1 is arranged on the front side surface of the device main body 7, an operation overcurrent indicator 2 is arranged on the front side of the device main body 7 and on the lower side of the zero sequence current real-time digital display 1, the operation overcurrent indicator 2 is a high-brightness LED lamp and is convenient to observe, a setting reset button 3 is arranged on the surface of the device main body 7 and on the lower side of the operation overcurrent indicator 2, a panel of the zero sequence current real-time digital display 1 is made of polycarbonate and is not prone to aging and yellowing, and can keep the display definition, a zero sequence current sampling terminal 4, an overcurrent output terminal 5 and a device power supply terminal 6 are sequentially arranged from left to right on the lower surface of the device main body 7, and a wireless signal transceiving module is arranged inside the device main body 7 and is convenient to upload data and send instructions.
Example two
Referring to fig. 1-2, a wiring structure is disposed on the rear side of the apparatus main body 7, the wiring structure includes an ac feed-out cable 8 and a zero sequence current transformer 9, the ac feed-out cable 8 is disposed on the rear side of the apparatus main body 7, the ac feed-out cable 8 is a 6kV cable, a wear-resistant coating is disposed on the surface of the ac feed-out cable 8 to improve the wear-resistant performance of the ac feed-out cable 8, the zero sequence current transformer 9 is sleeved outside the ac feed-out cable 8, a current transformer 10 is disposed on one side of the ac feed-out cable 8, the current transformer 10 is electrically connected to the zero sequence current transformer 9, a current detection device 12 is disposed on one side of the current transformer 10 away from the zero sequence current transformer 9, a comprehensive protection device 14 is disposed on one side of the current detection device 12, a signal input end 11 and a signal output end 13 are disposed at two ends of the current detection device 12, the signal input end 11 is electrically connected to the current transformer, and the signal output end 13 is electrically connected to the comprehensive protection device 14.
EXAMPLE III
Referring to fig. 3, the zero sequence current transformer 9 is in the shape of two mutually abutted semicircular rings and is convenient to take down.
Example four
Referring to fig. 1, the surface of the setting reset button 3 is provided with an indication mark, which facilitates recognition of functions of a plurality of setting reset buttons 3.
The utility model discloses in, zero sequence current transformer 9 cover is on high-pressure interchange presents cable 9, and the zero sequence current that detects is enlargied through current transformer 10, and zero sequence current real-time digital display 1 shows real-time zero sequence current value, and signal output part 13 connects integrated protection device 14. When a single-phase earth fault occurs in an external line, the secondary side of the mutual inductor outputs zero-sequence current, the zero-sequence current is amplified through the current mutual inductor 10, the signal input end collects the zero-sequence current of the line, and when the current is larger than a set value, the signal output end is closed, an earth signal is sent to the comprehensive protection device 14, and alarm information is displayed.
Referring to fig. 1: the zero sequence current real-time digital display 1 can enable personnel to monitor and detect the running zero sequence current of a circuit, when the circuit is grounded, the running overcurrent indicating lamp 2 gives an overcurrent signal, the overcurrent output terminal 5 is normally open and closed to give a signal, the reset button 3 is set to be capable of adjusting and setting a zero sequence overcurrent fixed value, the zero sequence current sampling terminal 4 is connected with the zero sequence mutual inductor 9 to detect the zero sequence current of the device, and the power terminal 6 of the device is supplied with a 24V direct current power supply.
Referring to fig. 2: the zero sequence current transformer 9 is sleeved on the alternating current feed-out cable 8, two ends of the secondary side of the zero sequence current transformer 9 are connected with the current transformer 10 in a winding mode, two ends of the secondary side of the current transformer 10 are connected with the signal input end 11, the signal output end 13 is connected with the comprehensive protection device 14, the anode of the power supply of the current detection device is connected with the anode of the 24V power supply, and the cathode of the power supply of the current detection device is connected with the cathode of the 24V power supply.
Referring to FIG. 3: the bus is connected with a plurality of feed-out circuits in parallel, if one feed-out circuit is in single-phase grounding, the low-current grounding line selection device can receive zero sequence current, a normally open point of a signal output end 6 is closed in the figure 3, the comprehensive protection device 14 receives a closing instruction, and an alarm signal is displayed by operating the overcurrent indicating lamp 2, so that the grounding circuit is selected.
The current detection unit (zero sequence current transformer) is installed on each feed-out line and used for detecting zero sequence current in the line, whether the grounding phenomenon exists in the line is judged according to the magnitude of the zero sequence current, and when the zero sequence current is larger than a normal value, the small current grounding detection device transmits the zero sequence current to the comprehensive protection device in a passive contact mode.
The signals are transmitted to the communication manager in the form of remote communication quantity through the internal logic conversion of the integrated protection, and the uploaded data are defined by utilizing the data storage and processing capacity of the communication manager and the editability of the background picture. When the metallic grounding of the system is detected, the indication signal and the message of the corresponding line are displayed in the background monitoring picture in real time.
Because whole function is established on the automatic platform of transformer substation, it is with low costs to have the input, and the accident information looks up simply, and the convenient advantage of operation management helps the more accurate locking problem circuit of personnel on duty, improves work efficiency, reduces the loss that the unnecessary power failure brought.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (9)
1. The utility model provides a protection device of alternating current power supply and distribution system undercurrent ground connection route selection, includes device main part (7) and zero sequence current real-time digital display (1), its characterized in that, zero sequence current real-time digital display (1) sets up in the front side surface of device main part (7), the front side of device main part (7) and the downside that is located zero sequence current real-time digital display (1) are provided with the operation and overflow pilot lamp (2), the surface of device main part (7) and the downside that is located operation and overflows pilot lamp (2) are provided with and set for reset button (3), the lower surface of device main part (7) has set gradually zero sequence current sampling terminal (4), has overflowed output terminal (5) and device power supply terminal (6) from a left side to the right side, the rear side of device main part (7) is provided with wiring structure.
2. The protection device for the small current grounding line selection of the alternating current power supply and distribution system according to claim 1, wherein the wiring structure comprises an alternating current feed-out cable (8) and a zero sequence current transformer (9), the alternating current feed-out cable (8) is arranged at the rear side of the device body (7), the zero sequence current transformer (9) is sleeved outside the alternating current feed-out cable (8), a current transformer (10) is arranged at one side of the alternating current feed-out cable (8), the current transformer (10) is electrically connected with the zero sequence current transformer (9), a current detection device (12) is arranged at one side of the current transformer (10) far away from the zero sequence current transformer (9), a comprehensive protection device (14) is arranged at one side of the current detection device (12), a signal input end (11) and a signal output end (13) are respectively arranged at two ends of the current detection device (12), the signal input end (11) is electrically connected with the current transformer, and the signal output end (13) is electrically connected with the comprehensive protection device (14).
3. A protection device for low current earthing selection of ac power supply and distribution system according to claim 2, characterized in that said ac feed-out cable (8) is a 6kV cable.
4. A protection device for low current grounding line selection of an ac power supply and distribution system according to claim 2, characterized in that the zero sequence current transformer (9) is in the shape of two mutually opposing half circles.
5. A protection device for low current grounding line selection of an ac power supply and distribution system according to claim 1, characterized in that the surface of the reset button (3) is provided with an indication mark.
6. A protection device for low current earthing selection of ac power supply and distribution system according to claim 2, characterized in that the surface of the ac feed-out cable (8) is provided with a wear resistant coating.
7. A protection device for low current grounding line selection of ac power supply and distribution system according to claim 1, characterized in that the device body (7) is internally provided with a wireless signal transceiver module.
8. A protection device for low current grounding line selection of an ac power supply and distribution system according to claim 1, wherein the operation overcurrent indicating lamp (2) is a high-brightness LED lamp.
9. The protection device for the low-current grounding line selection of the alternating current power supply and distribution system according to claim 1, wherein the panel of the zero-sequence current real-time digital display (1) is made of polycarbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222495159.8U CN218678408U (en) | 2022-09-20 | 2022-09-20 | Protection device for low-current grounding line selection of alternating current power supply and distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222495159.8U CN218678408U (en) | 2022-09-20 | 2022-09-20 | Protection device for low-current grounding line selection of alternating current power supply and distribution system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218678408U true CN218678408U (en) | 2023-03-21 |
Family
ID=85560135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222495159.8U Active CN218678408U (en) | 2022-09-20 | 2022-09-20 | Protection device for low-current grounding line selection of alternating current power supply and distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218678408U (en) |
-
2022
- 2022-09-20 CN CN202222495159.8U patent/CN218678408U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101483337B (en) | Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line | |
| CN203422438U (en) | Real-time monitoring and fault location system for overhead lines of power distribution network | |
| CN209150714U (en) | One or two fusion intelligent breakers based on full electronic mutual inductor | |
| CN201893540U (en) | Intelligent radio network dispatching digital-type boundary controller complete equipment | |
| CN204925314U (en) | Distribution network checkout system that fault locating used | |
| CN102074994B (en) | Charging device of direct-current (DC) system | |
| CN102749553A (en) | Automatic positioning device for grounding failure of power transmission line | |
| CN207835153U (en) | A kind of monitor control system | |
| CN203445696U (en) | Power distribution line online monitoring system | |
| CN107230970A (en) | A kind of singlephase earth fault processing method of the feeder automation of type on the spot | |
| CN218678408U (en) | Protection device for low-current grounding line selection of alternating current power supply and distribution system | |
| CN206411171U (en) | Switch built-in voltage sensor and its integrated | |
| CN108469574A (en) | One kind being based on wireless communication technique distribution intelligent monitor system and its application method | |
| CN111142059A (en) | Intelligent detection device and method for PT unit of outdoor ring main unit | |
| CN202041612U (en) | Automatic locating device for earth faults of electricity transmission lines | |
| CN206471821U (en) | Low-voltage network neutral line break detects protection device | |
| CN106059094B (en) | Distribution substation's transformer energy saving control system and method | |
| CN201387994Y (en) | Modular distribution cabinet with grounding knife switch | |
| CN108279360A (en) | Singlephase earth fault circuit monitoring system | |
| CN211905559U (en) | Looped netowrk cabinet fault monitoring controls device | |
| CN209448321U (en) | One or two fusion ring network cabinets | |
| CN102237714A (en) | Multipath residual current monitoring/protecting device with wireless or carrier transmission module | |
| CN201450318U (en) | Automatic false ground preventive low-voltage power distribution device | |
| CN201616628U (en) | Distribution box for construction technology | |
| CN215498243U (en) | Leakage protection system of block terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |