CN2363356Y - Neutral point grounding resistor - Google Patents
Neutral point grounding resistor Download PDFInfo
- Publication number
- CN2363356Y CN2363356Y CN 98233191 CN98233191U CN2363356Y CN 2363356 Y CN2363356 Y CN 2363356Y CN 98233191 CN98233191 CN 98233191 CN 98233191 U CN98233191 U CN 98233191U CN 2363356 Y CN2363356 Y CN 2363356Y
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Abstract
The utility model relates to a neutral point earthing resistor, which is used for a power supply system. The utility model is mainly composed of a tank body, a base, an upper cover plate, a high voltage leading-out terminal, etc.; the inner of the tank body is provided with a core body which can assemble in a mode of serial connection and parallel connection wafer-shaped linear resistor elements into columnar bodies which are uniformly distributed, the lower end face of the core body is connected with the base, and the upper end face of the core body is connected with the high voltage leading-out terminal by the upper cover plate. The utility model has the advantages of reasonable structure, small size, low cost, strong practicability, favorable performance of heat radiation, convenient and flexible installation, etc. The utility model can be widely used for neutral point protective circuits in urban and rural power system networks, power plants and other spare electric networks.
Description
The utility model relates to a kind of grounding resistor, particularly a kind ofly garden sheet shape linear resistive element can be assembled into a core body by the series and parallel mode and place in the housing and to constitute the neutral resistance device that power supply power system uses.
In existing technical scheme, its product mainly adopts two kinds of schemes to realize: the first kind is to adopt metal alloy compositions as the resistive element element, and volume was big after its product was formed, cost is high, and its application is restricted; Second class is improved on the basis of porcelain bushing type product, adopts zinc oxide resistance sheet as the resistive element element more, causes monomer whose thermal capacity little, need the use in parallel of many bodies, because of its volume is difficult for greatly installing, it is packaged in the insulator in addition, radiating effect is poor, and then makes its product reliability lower.
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, garden sheet shape linear resistive element can be assembled into a core body by the series and parallel mode and be packaged in neutral resistance device in the metal can and provide a kind of.
The solution that realizes the utility model purpose is: a kind of neutral resistance device, comprise a tank body, a base, a upper cover plate and a high-voltage outlet terminal, its special character is: described tank body is a hollow cavity of tubular, its lower port neighboring is provided with one can pass through one group of lower flange that bolt links to each other with base, its upper port neighboring also is provided with one can pass through one group of upper flange plate that bolt links to each other with upper cover plate, be provided with one in it by the folded mutually thick core body that constitutes of garden sheet shape linear resistive element, the middle part of its periphery is provided with an instrument case, be provided with an ammeter and an operation counter in its instrument case, its instrument case external port cooperation is equipped with one in order to observe the transparent windows of described ammeter and operation counter reading, the bottom of its periphery wall is provided with an outlet ring flange, the external port of its outlet ring flange is provided with one through one group of connector connection, one winding terminal is housed on it, and the insulation board that the external port sealing of itself and described outlet ring flange is pasted mutually with sealing ring, described base is a tabular body of square, its upper surface is provided with the garden connected in star that can place a lower seal, the center of its upper surface is provided with a conducting rod that current transformer is housed on it, its upper surface also equal distribution is equipped with one group of support insulator, being provided with one group in its plate can be connected as a single entity by one group of bolt and described lower flange, and through the screw of described lower seal sealing, but equal distribution is provided with one group of installing hole in four angles of its plate, the lead-out wire of described current transformer links to each other with described binding post, the upper end of described bolt porcelain vase is equipped with a bottom plate parallel with described base upper surface by connector, described bottom plate is the thin plate that metal material is made, the center is provided with a through hole that described conducting rod upper end is installed, its periphery is provided with one group of installing hole that can insert the insulated tension pole lower end, its upper surface is placed with by garden sheet shape linear resistive element by string, parallel way is assembled into one group of columnar core of equal distribution, each post of described columnar core can constitute by a plurality of gardens sheet shape linear resistive element is folded thick successively, be provided with a conducting strip between its bottom ground floor and the second layer linear resistive element in order to current-sharing, and it is linked to each other with described binding post by the actuating signal line, its bottom above linear resistive element interlayer of the second layer also can be provided with the current-sharing conducting strip as required, its top is provided with a upper padding plate, the upper surface of described upper padding plate is provided with one group of spring conductive strips, the upper end of described spring conductive strips is provided with a top board, the adjacent column body space place of columnar core all is provided with an insulated tension pole from top to bottom between described top board and the bottom plate, the lower end of described insulated tension pole inserts in the set hole of described bottom plate periphery, and snap in a corresponding spacing card, its upper end inserts in the corresponding hole of described the top board set and described bottom plate of periphery, and snap in corresponding spacing card, the upper surface of described top board also is provided with one group of spring conductive strips, the upper end of described spring conductive strips is provided with an inverted T shape screw, and described T shape screw is through diaphragm seal and upper cover plate spiral shell
Link to each other, described upper cover plate is a thin plate made from insulating material, its neighboring is provided with one group of through hole that is connected by one group of bolt with described upper flange plate, and the center is provided with a through hole and a flake hole that T shape screw can be installed successively, and the screw rod of T shape screw is through spiral shell in its central through hole
Stretch out along the axis in described flake hole fastening back, a high-voltage outlet terminal is equipped with in screw rod cooperation by T shape screw in its flake hole, be provided with the epoxy sealing glue-line between the bottom faying face of its flake hole and described high-voltage outlet terminal, and be provided with a room temperature vulcanization cushion rubber between the faying face of described high-voltage outlet terminal lower end periphery wall, described high-voltage outlet terminal is a column of being made by parts such as insulated tubes, be sticked the mutually silastic material of a likeness in form tower shape of the periphery wall of its insulated tube, the bottom electrode that a periphery also is provided with screw thread is housed on the bottom inner thread of its insulated tube, described bottom electrode is a column made from the good conductor of electricity material, its bottom surface upwards is provided with a screw that matches and be connected with the screw rod of described T shape screw along axis, its upper surface is provided with a column cushion block of also being made by good electric conducting material, the upper surface of described cushion block is provided with spring conductive strips from bottom to top, the upper surface of described spring conductive strips is provided with its periphery wall and is provided with screw thread, can install with the threads engaged of described insulated tube upper end inwall, the top electrode of likeness in form column, described top electrode is also made by the good conductor of electricity material, the central axis place of its upper surface is provided with a screw, a jackscrew that itself and wiring cap can be connected as one is housed in the screw, described wiring cap is a likeness in form cone, the also electric conductor of making by good electric conducting material, its top connects mouth and is provided with an installing hole, its lower surface is provided with a trapezoidal hole and screw from bottom to top successively along central axis, by the upper end that described jackscrew is housed it is linked to each other with described top electrode in its screw.
Accompanying drawing has been described a preferred embodiment of the present utility model.
Fig. 1 is the structure principle chart of the utility model embodiment.
Below in conjunction with accompanying drawing content of the present utility model is described in detail.
Know referring to Fig. 1: the utility model comprises a tank body 23, a base 29, a upper cover plate 11 and a high-voltage outlet terminal 30, described tank body 23 is a hollow cavity of tubular, its lower port neighboring is provided with one can pass through one group of lower flange 45 that bolt 25 links to each other with base 29, its upper port neighboring also is provided with one can pass through one group of upper flange plate 13 that bolt 12 links to each other with upper cover plate 11, be provided with one in it by the linear electric set of pieces 24 mutually folded thick one-tenth columns of garden sheet shape, the core body that this column equal distribution is constituted again, the middle part of its periphery wall is provided with an instrument case 33, be respectively equipped with an ammeter 34 and an operation counter 35 of connecting through circuit in its instrument case 33, the external port cooperation of its instrument case 33 is equipped with one in order to observe the transparent windows 36 of described ammeter 34 and operation counter 35 readings, the bottom of its periphery wall is provided with an outlet ring flange 37, the external port of its outlet ring flange 37 is provided with one through 38 connections of one group of connector, one winding terminal 40 is housed on it, and the insulation board 39 that the external port sealing of itself and described outlet ring flange 37 is pasted mutually with sealing ring 42, described base 29 is a tabular body of square, its upper surface is provided with the annular groove that can place a lower seal 46, the center of its upper surface is provided with a conducting rod 28 that current transformer 47 is housed on it, its upper surface also equal distribution is equipped with one group of support insulator 44, being provided with one group in its plate can be connected as a single entity by one group of bolt 25 and described lower flange 45, and through the screw of described lower seal 46 sealings, but equal distribution is provided with one group of installing hole in four angles of its plate, the lead-out wire 43 of described current transformer 47 links to each other with described binding post 40, the upper end of described support insulator 44 by connector 26 be equipped with one with the parallel bottom plate 27 of described base 29 upper surfaces, the thin plate that described bottom plate 27 is made for metal material, the center is provided with a through hole that described conducting rod 28 upper ends are installed, its periphery is provided with one group of installing hole that can insert insulated tension pole 21 lower ends, its upper surface is placed with by garden sheet shape linear resistive element 24 by string, parallel way is assembled into one group of columnar core of equal distribution, each post of described columnar core can constitute by a plurality of gardens sheet shape linear resistive element 24 is folded thick successively, be provided with a conducting strip between its bottom ground floor and the second layer linear resistive element 24 in order to current-sharing, and it is linked to each other with described binding post 40 by actuating signal line 41, the interlayer of the linear resistive element 24 that its bottom second layer is above also can be provided with the current-sharing conducting strip as required, its top is provided with a upper padding plate 31, the upper surface of described upper padding plate 31 is provided with one group of spring conductive strips 22, the upper end of described spring conductive strips 22 is provided with a top board 20, the adjacent column body space place of core body all is provided with an insulated tension pole 21 from top to bottom between described top board 20 and the bottom plate 27, the lower end of described insulated tension pole 21 inserts in the set hole of described bottom plate 27 peripheries, and snap in a corresponding spacing card 32, its upper end inserts in the set and described bottom plate of the described top board 20 peripheries 27 corresponding holes, and snap in corresponding spacing card 32, the upper surface of described top board 20 also is provided with one group of spring conductive strips 22, the upper end of described spring conductive strips 22 is provided with an inverted T shape screw 18, and described T shape screw 18 is used spiral shell through diaphragm seal 19 and upper cover plate 11
10 link to each other, described upper cover plate 11 is a thin plate made from insulating material, its neighboring is provided with one group of through hole that is connected by one group of bolt 12 with described upper flange plate 13, the center is provided with a through hole and a flake hole that T shape screw 18 can be installed successively, and the screw rod of T shape screw 18 is through spiral shell in its central through hole
Stretch out along the axis in described flake hole 10 fastening backs, a high-voltage outlet terminal 30 is equipped with in screw rod cooperation by T shape screw 18 in its flake hole, be provided with epoxy sealing glue-line 17 between the bottom faying face of its flake hole and described high-voltage outlet terminal 30, and be provided with a room temperature vulcanization cushion rubber 16 between the faying face of described high-voltage outlet terminal 30 bottom periphery walls, described high-voltage outlet terminal 30 is a column of being made by insulated tube 7 parts such as grade, be sticked the mutually silastic material 5 of a likeness in form tower shape of the periphery wall of its insulated tube 7, the bottom electrode 9 that a periphery also is provided with screw thread is housed on the bottom inner thread of its insulated tube 7, described bottom electrode 9 is a column that the good electric conducting material of usefulness is made, its bottom surface upwards is provided with a screw that matches and be connected with the screw rod of described T shape screw 18 along axis, its upper surface is provided with a column cushion block 8 of also being made by good electric conducting material, the upper surface of described cushion block 8 is provided with spring conductive strips 6 from bottom to top, the upper surface of described spring conductive strips 6 is provided with its periphery wall and is provided with screw thread, can install with the threads engaged of described insulated tube 7 upper end inwalls, the top electrode 4 of likeness in form column, described top electrode 4 is also made by the good conductor of electricity material, the central axis place of its upper surface is provided with a screw, a jackscrew 3 that itself and wiring cap 2 can be connected as one is housed in the screw, described wiring cap 2 is a likeness in form cone, the also electric conductor of making by good electric conducting material, its top connects mouth and is provided with an installing hole 1, its lower surface is provided with a trapezoidal hole and screw from bottom to top successively along central axis, by the upper end that described jackscrew 3 is housed it is linked to each other with described top electrode 4 in its screw.
The utility model embodiment operation principle is as follows: by installing hole 1 on the wiring cap 2 and the installing hole on the base 29, the utility model is connected between the transformer neutral point and ground of electric power system earlier.When system normally moved, its neutral point did not have floating-potential, and the utility model no current passes through; When instantaneous single-phase fault appearred in system, its neutral point current potential just produced drift, and the utility model has electric current to pass through and absorbs energy.When electric current arrived setting greatly, its action numeration drives operation counter 35 numerations once; When the single-phase earthing of long period appears in system, the utility model has electric current to flow through and absorbs energy, when electric current arrives setting greatly, its action numeration drives action register 35 numerations once, and by current transformer 47 signal is delivered to systems control division and divide and to make its tripping operation, avoid system's overvoltage to damage.
The described ammeter 34 of the utility model embodiment can adopt and exchange 0-100A type series; Described operation counter 35 can adopt J J-1 type series; Described support insulator 44 can adopt 10KV type series; Described current transformer 47 can adopt LMZ-0.5 type series.
Can find out that in conjunction with above-described embodiment the utility model is compared existing technology and had following advantage:
1. rational in infrastructure, flexible for installation, convenient;
2. volume is little, cost is low, practical;
3. perfect heat-dissipating, reliable has been eradicated the big electric current that the electric power system electrical network produces because of single-phase fault, overvoltage damage.
The utility model can be widely used in the neutral point protection circuit of city, township's electric power system electrical network and power plant and other emergency network.
Claims (2)
1. neutral resistance device, comprise a tank body (23), a base (29), a upper cover plate (11) and a high-voltage outlet terminal (30), it is characterized in that: described tank body (23) is a hollow cavity of tubular, the lower flange of its lower port (45) links to each other with base (29) by one group of bolt (25), the upper flange plate of its upper port (13) links to each other with upper cover plate (11) by one group of bolt (12), be provided with one in it by the folded mutually thick one-tenth column of disc linear resistive element (24), the core body that this column equal distribution is constituted again, the middle part of its periphery wall is provided with an instrument case (33), be respectively equipped with the ammeter (34) and the operation counter (35) that connect through circuit in its instrument case (33), a transparent windows (36) is equipped with in the external port cooperation of its instrument case (33), the bottom of its periphery wall is provided with an outlet ring flange (37), the external port of its outlet ring flange (37) is provided with one and connects through one group of connector (38), one winding terminal (40) is housed on it, and the insulation board (39) that the external port sealing of itself and described outlet ring flange (37) is pasted mutually with sealing ring (42), described base (29) is a tabular body of square, its upper surface is provided with the annular groove that can place a lower seal (46), the center of its upper surface is provided with a conducting rod (28) that current transformer (47) are housed on it, its upper surface also equal distribution is equipped with one group of support insulator (44), being provided with one group in its plate can be connected as a single entity by one group of bolt (25) and described lower flange (45), and through the screw of described lower seal (46) sealing, but equal distribution is provided with one group of installing hole in four angles of its plate, the lead-out wire (43) of described current transformer (47) links to each other with described binding post (40), the upper end of described support insulator (44) is equipped with a bottom plate (27) parallel with described base (29) upper surface by connector (26), the thin plate that described bottom plate (27) is made for metal material, the center is provided with a through hole that described conducting rod (28) upper end is installed, its periphery is provided with one group of installing hole that can insert insulated tension pole (21) termination, its upper surface is placed with one group of columnar core, be provided with a conducting strip between its core body bottom ground floor and the second layer linear resistive element (24) in order to current-sharing, and it is linked to each other with described binding post (40) by actuating signal line (41), the interlayer of the linear resistive element (24) that its bottom second layer is above also can be provided with the current-sharing conducting strip as required, its top is provided with a upper padding plate (31), the upper surface of described upper padding plate (31) is provided with one group of spring conductive strips (22), the upper end of described spring conductive strips (22) is provided with a top board (20), the adjacent column body space place of core body all is provided with an insulated tension pole (21) from top to bottom between described top board (20) and the bottom plate (27), the lower end of described insulated tension pole (21) inserts in the set hole of described bottom plate (27) periphery, and snap in a corresponding spacing card (32), its upper end insert described top board (20) periphery set with the corresponding hole of described bottom plate (27) in, and snap in corresponding spacing card (32), the upper surface of described top board (20) also is provided with one group of spring conductive strips (22), the upper end of described spring conductive strips (22) is provided with an inverted T shape screw (18), and described T shape screw (18) is used spiral shell through diaphragm seal (19) and upper cover plate (11)
(10) link to each other, described upper cover plate (11) is a thin plate made from insulating material, its neighboring is provided with one group of through hole that links to each other by one group of bolt (12) with described upper flange plate (13), the center is provided with a through hole and a flake hole that T shape screw (18) can be installed successively, and the screw rod of T shape screw (18) is through spiral shell in its central through hole
(10) stretch out from the axis in described flake hole fastening back, a high-voltage outlet terminal (30) is equipped with in screw rod cooperation by T shape screw (18) in its flake hole, be provided with epoxy sealing glue-line (17) between the bottom faying face of its flake hole and institute's art high-voltage outlet terminal (30), and be provided with a room temperature vulcanization cushion rubber (16) between the faying face of described high-voltage outlet terminal (30) bottom periphery wall.
2. neutral resistance device as claimed in claim 1, it is characterized in that: described high-voltage outlet terminal (30) is a column of being made by insulated tube parts such as (7), be sticked the mutually silastic material (5) of a likeness in form tower shape of the periphery wall of its insulated tube (7), the bottom electrode (9) that a periphery also is provided with screw thread is housed on the bottom inner thread of its insulated tube (7), described bottom electrode (9) is a column that the good electric conducting material of usefulness is made, its bottom surface upwards is provided with a screw that matches and be connected with the screw rod of described T shape screw (18) along axis, its upper surface is provided with a column cushion block (8) of also being made by the good conductor of electricity material, the upper surface of described cushion block (8) is provided with spring conductive strips (6) from bottom to top, the upper surface of described spring conductive strips (6) is provided with its periphery wall and is provided with screw thread, can install with the threads engaged of described insulated tube (7) upper end inwall, the top electrode (4) of likeness in form column, described top electrode (4) is also made by good electric conducting material, the central axis place of its upper surface is provided with a screw, a jackscrew (3) that itself and wiring cap 2 can be connected as one is housed in the screw, described wiring cap (2) is a likeness in form cone, the also electric conductor of making by good electric conducting material, its top connects mouth and is provided with an installing hole (1), its lower surface is provided with a trapezoidal hole and screw from bottom to top successively along central axis, by the upper end that described jackscrew (3) is housed it is linked to each other with described top electrode (4) in its screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98233191 CN2363356Y (en) | 1998-11-30 | 1998-11-30 | Neutral point grounding resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98233191 CN2363356Y (en) | 1998-11-30 | 1998-11-30 | Neutral point grounding resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2363356Y true CN2363356Y (en) | 2000-02-09 |
Family
ID=33981982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98233191 Expired - Lifetime CN2363356Y (en) | 1998-11-30 | 1998-11-30 | Neutral point grounding resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2363356Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101256206B (en) * | 2007-02-27 | 2011-07-20 | 上海市电力公司 | Method for measuring and recording mutation current of neutral point earthing resistor |
| CN103280282A (en) * | 2013-04-24 | 2013-09-04 | 北京天诚同创电气有限公司 | Brake resistor used for current transformer of wind driven generator |
| CN101889474B (en) * | 2007-12-05 | 2013-09-11 | 山特维克知识产权股份有限公司 | Fastening means for terminals for electrical resistance elements |
-
1998
- 1998-11-30 CN CN 98233191 patent/CN2363356Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101256206B (en) * | 2007-02-27 | 2011-07-20 | 上海市电力公司 | Method for measuring and recording mutation current of neutral point earthing resistor |
| CN101889474B (en) * | 2007-12-05 | 2013-09-11 | 山特维克知识产权股份有限公司 | Fastening means for terminals for electrical resistance elements |
| CN103280282A (en) * | 2013-04-24 | 2013-09-04 | 北京天诚同创电气有限公司 | Brake resistor used for current transformer of wind driven generator |
| CN103280282B (en) * | 2013-04-24 | 2016-04-13 | 北京天诚同创电气有限公司 | For the brake resistance of current transformer of wind-driven generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XI AN ETOWN LIGHTNING ARRESTER RESEARCH INSTITUTE Free format text: FORMER OWNER: SHENDIAN LIGHTNING ARRESTER CO., LTD., XIAN Effective date: 20040220 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20040220 Address after: No. 1, electronic East Street, electronic city, Shaanxi, Xi'an Patentee after: Xi'an Electronic City lightning arrester Research Institute Address before: Ye Xiaozhuan, 1 e East Street, electronic city, Shaanxi, Xi'an Patentee before: Shendian Lightning Arrester Co., Ltd., Xian |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |