CN219918403U - Low-voltage selective leakage protection device - Google Patents
Low-voltage selective leakage protection device Download PDFInfo
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- CN219918403U CN219918403U CN202320123600.1U CN202320123600U CN219918403U CN 219918403 U CN219918403 U CN 219918403U CN 202320123600 U CN202320123600 U CN 202320123600U CN 219918403 U CN219918403 U CN 219918403U
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- 230000000903 blocking effect Effects 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000002474 experimental method Methods 0.000 claims abstract description 6
- 230000001012 protector Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000005065 mining Methods 0.000 description 9
- 239000003245 coal Substances 0.000 description 6
- 230000005669 field effect Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model provides a low-voltage selective leakage protection device, which comprises a low-voltage selective leakage protection device body, wherein the low-voltage selective leakage protection device body comprises a power transformer, a zero sequence current transformer, a tripping coil, an experiment resistor and an inductance coil, and a signal circuit board for sampling zero sequence voltage, direct current voltage, leakage blocking and switching-on signal circuits is arranged on the low-voltage selective leakage protection device body.
Description
Technical Field
The utility model belongs to the technical field of mining area electric power safety, and particularly relates to a low-voltage selective leakage protection device.
Background
The coal industry is an important energy industry, china is a large country for producing coal, but the underground production environment of the coal mine is complex, the natural condition is bad, the power supply equipment is easy to damage, electric leakage, electric shock and electric spark are possibly caused, fire and even gas explosion are caused, and casualties are caused, so that along with the development of the coal mine industry, the requirements on the underground reliability, safety and continuity of the coal mine are higher and higher, the safety of mining personnel and the normal operation of electrical equipment are ensured, the loss of accidents is reduced, the reliability of a mining power supply system is improved, the safe power supply of the mining is ensured, and a low-voltage leakage selection protection device is arranged on a mining power grid to protect the mining.
The prior Chinese patent publication No. CN2679899Y discloses a selective leakage protection device for a mining low-voltage power grid, which has four functions of selective leakage protection, leakage blocking, leakage backup protection and artificial leakage test, and is a great improvement on a KXL-I type leakage protection device passing through the ministry identification. The device maintains the original functions, considers the installation and maintenance requirements, and assembles the components which are easy to replace and influence the line fault cause searching into a plug-in box, if the device has faults, the device can be integrally taken down to replace new components, and if the line faults can be taken down, the plug-in is insulated by shaking. The explosion-proof device can be arranged in the explosion-proof shell of the branch feed switch, the original transformer chamber is not required to be changed, external cable wiring is not required to be added, the equipment investment is low, the installation is easy, and the maintenance and the repair are convenient and quick. When the low-voltage leakage selecting protection device is in actual use, the plug-in box mounting plate is mounted on the side face of the feed switch core by adopting the fixing bolt, and the mounting mode can mount the plug-in box mounting plate on the side face of the feed switch core, but after the fixing bolt is used for a long time, the phenomenon of sliding wire or rust can occur, so that the phenomenon that the plug-in box mounting plate is not connected stably or cannot be taken off occurs, and potential safety hazards exist.
Accordingly, the present utility model has been made in view of the above circumstances, and an object of the present utility model is to provide a low-voltage leakage protector for achieving a more practical value.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a low-voltage leakage selecting protection device, which aims to solve the problems that when the existing low-voltage leakage selecting protection device is in actual use, a plug-in box mounting plate is mounted on the side surface of a feed switch core by adopting a fixing bolt, and in the mounting mode, the plug-in box mounting plate can be mounted on the side surface of the feed switch core, but after the fixing bolt is used for a long time, the phenomenon of sliding wire or rust can occur, so that the phenomenon that the plug-in box mounting plate is not connected stably or cannot be taken down occurs, and potential safety hazards exist.
The purpose and the effect of the low-voltage selective leakage protection device are achieved by the following specific technical means:
the utility model provides a low pressure selects leakage protection device, includes low pressure selects leakage protection device body, low pressure selects leakage protection device body includes power transformer, zero sequence current transformer, tripping coil, experiment resistance, inductor, low pressure is selected leakage protection device body and is installed sample zero sequence voltage, direct current voltage, electric leakage shutting and switch closing signal circuit's signal circuit board, integrated circuit board that has selectivity electric leakage protection and electric leakage shutting signal processing and contact switching relay circuit, and this device is with power transformer, experiment resistance, inductor and signal circuit board and circuit board equipment in the plug-in components box, the plug-in components box is fixed on the plug-in components box mounting panel, the plug-in components box mounting panel is through plug-in components subassembly detachable connection in one side of installing at low pressure selects leakage protection device body, the plug-in components subassembly is including perpendicular connection in components box mounting panel rear side's picture peg, the both sides of low pressure selects leakage protection device body all are connected with the fixed plate, one of which fixed plate's top and bottom all slip run through limit post, two one of fixed plate the one end in the top of plug-in board and the bottom of plug-in components box and the one end of limit post respectively.
Further, the cartridge employs a standard L6.2 core connector, and the cartridge is connected to the front side of the cartridge mounting plate with bolts.
Further, one side of the inside of the slot is connected with two guide bars, and one side of the plugboard is provided with two guide grooves matched with the guide bars.
Further, the top and the bottom of one of the fixing plates are provided with mounting grooves, the two limit posts respectively penetrate through the corresponding mounting grooves in a sliding mode, and the top and the bottom of the plug-in box mounting plate are provided with limit grooves corresponding to the positions of the limit posts.
Further, two limiting plates are sleeved on the limiting columns, the limiting plates are connected inside the corresponding mounting grooves in a sliding mode, and springs are connected between the limiting plates and the corresponding mounting grooves.
Further, the other ends of the two limit posts are connected with handles.
Furthermore, the zero sequence current transformer is provided with signal circuit boards for sampling zero sequence voltage, direct current voltage, leakage blocking and switch closing signal circuits, and the signal circuit boards are respectively encapsulated by resin.
Compared with the prior art, the utility model has the following beneficial effects:
1. according to the utility model, the plug-in assembly is arranged, when the plug-in assembly is disassembled, the two limit posts are pulled outwards to separate from the limit of the plug-in box mounting plate, the plug-in board is pulled outwards from the slot, then the plug-in box mounting plate is taken down, the situation that the bolts slide and rust are caused when the bolts are mounted is avoided, the device is detachably plugged on the side face of the low-voltage selective leakage protection device body, the installation and replacement can be realized without disassembling the low-voltage selective leakage protection device body under the condition of not reducing the original protection function, the maintenance time and the cost can be saved for a user, the production downtime of a coal mine is reduced, and the labor intensity is reduced;
2. the low-voltage selective leakage protection device body is directly arranged inside the branch feed switch, so that no explosion-proof equipment is needed, no external cable connection is needed, an original transformer ketone chamber is not needed to be changed, standardized management is facilitated, and the applicability of the mining low-voltage selective leakage protection device is improved.
Drawings
Fig. 1 is a schematic perspective view of the present utility model.
Fig. 2 is a schematic perspective view of a second embodiment of the present utility model.
Fig. 3 is a schematic perspective view of a plug assembly according to the present utility model.
Fig. 4 is a schematic view of a partial side cross-sectional structure of the present utility model.
In the figure, the correspondence between the component names and the drawing numbers is:
1. a low-voltage selective leakage protection device body; 2. a fixing plate; 3. a plug-in box mounting plate; 4. a card box; 5. a connector; 6. a bolt; 7. a plug assembly; 71. inserting plate; 72. a slot; 73. a guide bar; 74. a guide groove; 75. a mounting groove; 76. a limit column; 77. a limiting plate; 78. a spring; 79. a limit groove; 710. a handle.
Detailed Description
Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples:
as shown in fig. 1 to 4:
the utility model provides a low-voltage selective leakage protection device, which comprises a low-voltage selective leakage protection device body 1, wherein the low-voltage selective leakage protection device body 1 comprises a power transformer, a zero sequence current transformer, a tripping coil, an experiment resistor and an inductance coil, the low-voltage selective leakage protection device body 1 is provided with a signal circuit board of sampling zero sequence voltage, direct current voltage, leakage blocking and switching-on signal circuits, a circuit board of a selective leakage protection, leakage blocking signal processing and contact switching relay circuit is integrated, a switching-on power transmission signal sampling circuit comprises a diode, a resistor and a field effect tube, the gate electrode of the field effect tube is connected to the output end of the signal circuit board and is connected with the ground through the resistor, the source electrode of the field effect tube is connected with the ground, the drain electrode of the field effect tube is connected with the cathode of the diode and one ends of coils of relays 3ZJ and 4ZJ in parallel, and the 3ZJ and 4ZJ coils are directly powered by a power source side transformer, and the switching-on side transformer and a rectifying and voltage stabilizing circuit of the original device are canceled. Therefore, a transformer and a rectifying and voltage stabilizing circuit are saved, and a diode, a resistor sampling and a switch power transmission signal are changed to push a field effect transistor to conduct 3ZJ and 4ZJ for power-on actions; the field effect tube is cut off 3ZJ, 4ZJ and is electroless, realize the node conversion, the device is with power transformer, experimental resistance, inductor and signal circuit board and circuit board equipment in plug-in components box 4, plug-in components box 4 is fixed on plug-in components box mounting panel 3, plug-in components box mounting panel 3 is through plug-in components subassembly 7 detachable connect in installing in the one side at low pressure select leakage protection device body 1, plug-in components subassembly 7 includes the picture peg 71 of perpendicular connection in plug-in components box mounting panel 3 rear side, the both sides of low pressure select leakage protection device body 1 all are connected with fixed plate 2, the slot 72 with picture peg 71 assorted is seted up to the front side of one of them fixed plate 2, the top and the bottom of one of them fixed plate 2 all slip run through have spacing post 76, the one end of two spacing posts 76 is pegged graft respectively in the top and the bottom of plug-in components box mounting panel 3.
In other embodiments, the plug-in box 4 adopts a standard L6.2 core connector 5, the plug-in box 4 adopts a bolt 6 to be connected with the front side of the plug-in box mounting plate 3, so that a 660V/380V power supply is directly communicated with an internal circuit of the plug-in box 4 through the connector 5, the device cost is low, the plugging is more reliable, and the insulation of an external circuit can be measured by pulling down the standard L6.2 core connector 5.
In other embodiments, two guide strips 73 are connected to one side of the interior of the slot 72, two guide grooves 74 matching the guide strips 73 are provided on one side of the insert plate 71, by providing guide bar 73 and guide groove 74 for use, slot 72 and board 71 are more stable when connected.
In other embodiments, the top and bottom of one of the fixing plates 2 are provided with the mounting grooves 75, the two limiting posts 76 respectively slide through the corresponding mounting grooves 75, the top and bottom of the plug-in box mounting plate 3 are provided with the limiting grooves 79 corresponding to the positions of the limiting posts 76, and the positions of the plug-in box mounting plate 3 are limited by the limiting posts 76, so that the plug-in box mounting plate 3 is prevented from sliding randomly in the fixing plate 2.
In other embodiments, the two limiting posts 76 are respectively sleeved with a limiting plate 77, the two limiting plates 77 are respectively and slidably connected inside the corresponding mounting grooves 75, springs 78 are respectively connected between the two limiting plates 77 and the corresponding mounting grooves 75, and the limiting posts 76 can be driven to move by using the elasticity of the springs 78 so that the limiting posts can be inserted into the limiting grooves 79 to limit the positions of the mounting plates 3 of the plug-in boxes.
In other embodiments, handles 710 are connected to the other ends of the two restraining posts 76, and comfort in use of the restraining posts 76 is increased by providing the handles 710.
In other embodiments, the zero sequence current transformer is provided with a signal circuit board for sampling zero sequence voltage, direct current voltage, leakage blocking and switch closing signal circuits, and the signal circuit boards are respectively encapsulated by resin, so that the circuit is sealed, the volume is reduced, the service life is prolonged, faults are reduced, and the zero sequence current transformer can work in severe environments with serious humidity and dust.
Specific use and action of the embodiment:
according to the utility model, when elements in the plug-in box 4 are required to be overhauled and disassembled, the handle 710 cylinder is held and simultaneously two limit posts 76 are pulled outwards, so that the spring 78 is compressed, the limit posts 76 are moved out of the limit grooves 79, the limit posts 76 are separated from the limit of the mounting plate of the plug-in box 4, then the plug-in plate 71 is pulled outwards from the slots 72, and then the mounting plate 3 of the plug-in box is taken down, so that the situation that bolt sliding wires and rusting occur due to the fact that the mounting is adopted is avoided.
It should be noted that, since the present utility model is an improvement based on the KXL-I mining low-voltage network selective leakage protection device, the parts of the original circuit and structure that are not improved will not be described in detail herein, and the power supply, specific components and principles thereof will be apparent to those skilled in the art, and will not be described in detail.
The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (7)
1. The utility model provides a low pressure selects leakage protection device, is connected with branch circuit feed switch, including low pressure selects leakage protection device body (1), low pressure selects leakage protection device body (1) including power transformer, zero sequence current transformer, tripping coil, experiment resistance, inductance coil, signal circuit board that sampling zero sequence voltage, direct current voltage, electric leakage blocking and switch closing signal circuit is installed to low pressure selects leakage protection device body (1), integrated selective leakage protection and electric leakage blocking signal processing and contact switching relay circuit's circuit board, its characterized in that, the device is with power transformer, experiment resistance, inductance coil and signal circuit board and circuit board equipment in plug-in components box (4), plug-in components box (4) are fixed on plug-in components box mounting panel (3), plug-in components box mounting panel (3) are detachably connected in one side of installing in low pressure selects leakage protection device body (1), plug-in components subassembly (7) are including plug-in board (71) that are connected in components box (3) rear side perpendicularly, low pressure selects leakage protection device body (1) to be connected with one of them (2) and one of them (72) are fixed with one of them (72) that the top (2) are fixed with one of them all fixed with plug-in board (2), one ends of the two limiting columns (76) are respectively inserted into the top and the bottom of the plug-in box mounting plate (3).
2. The low voltage leakage protector of claim 1, wherein: the plug-in box (4) adopts a standard L6.2 core connector (5), and the plug-in box (4) is connected with the front side of the plug-in box mounting plate (3) by adopting bolts (6).
3. The low voltage leakage protector of claim 1, wherein: two guide strips (73) are connected to one side of the inside of the slot (72), and two guide grooves (74) matched with the guide strips (73) are formed in one side of the plugboard (71).
4. The low voltage leakage protector of claim 1, wherein: one of them fixed plate (2) top and bottom all have seted up mounting groove (75), two spacing post (76) slip respectively run through inside corresponding mounting groove (75), spacing groove (79) have all been seted up in the position that top and bottom of plug-in components box mounting panel (3) correspond spacing post (76).
5. The low voltage leakage protection device of claim 4, wherein: and the two limiting columns (76) are respectively sleeved with a limiting plate (77), the two limiting plates (77) are respectively and slidably connected inside the corresponding mounting grooves (75), and springs (78) are respectively connected between the two limiting plates (77) and the corresponding mounting grooves (75).
6. The low voltage leakage protection device of claim 5, wherein: the other ends of the two limiting columns (76) are connected with handles (710).
7. The low voltage leakage protector of claim 1, wherein: the zero sequence current transformer is provided with signal circuit boards for sampling zero sequence voltage, direct current voltage, leakage blocking and switch closing signal circuits, and the signal circuit boards are respectively encapsulated by resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320123600.1U CN219918403U (en) | 2023-01-17 | 2023-01-17 | Low-voltage selective leakage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320123600.1U CN219918403U (en) | 2023-01-17 | 2023-01-17 | Low-voltage selective leakage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219918403U true CN219918403U (en) | 2023-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320123600.1U Active CN219918403U (en) | 2023-01-17 | 2023-01-17 | Low-voltage selective leakage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219918403U (en) |
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2023
- 2023-01-17 CN CN202320123600.1U patent/CN219918403U/en active Active
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