CN107240903B - Totally enclosed type neutral point gap earth protective device - Google Patents

Totally enclosed type neutral point gap earth protective device Download PDF

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Publication number
CN107240903B
CN107240903B CN201710366075.5A CN201710366075A CN107240903B CN 107240903 B CN107240903 B CN 107240903B CN 201710366075 A CN201710366075 A CN 201710366075A CN 107240903 B CN107240903 B CN 107240903B
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China
Prior art keywords
conductor
shell
current transformer
connection
connect
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CN201710366075.5A
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Chinese (zh)
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CN107240903A (en
Inventor
张国良
张新伟
孙博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liaoning Constant Voltage High Voltage Switch Co Ltd
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Liaoning Constant Voltage High Voltage Switch Co Ltd
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Priority to CN201710366075.5A priority Critical patent/CN107240903B/en
Publication of CN107240903A publication Critical patent/CN107240903A/en
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/04Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers

Abstract

The invention belongs to power industry equipment, in particular to a kind of totally enclosed type neutral point gap earth protective device.It includes bracket (24), arrester (25), cable tank body (17), oil-gas casing (18), current transformer one, two (8), (8-1), it is characterized in that fixing right angle seat (24-1) with bolt and nut above two parallel vertical brackets (24), current transformer one (8) is fixed with above shell (10), it connects conductor five (14) horizontal connection guide rod (15), oil-gas casing (18) are correspondingly provided in the right end of connection transition conductor (16), current transformer two (8-1) is equipped on the excircle of cable tank body (17), crank arm box (1) is fixed on the left side of shell (10), it is horizontal in crank arm box (1) to be equipped with connection conductor one (4), connect conductor one (4) left end pin shaft hinge connective pole (3 ).This device integrates the complete set of equipments of the electrical equipments such as earthing switch, Zinc-Oxide Arrester, discharging gap and current transformer, is installed in closed cavity, has the characteristics of high stability, installation and debugging are convenient, high reliablity.

Description

Totally enclosed type neutral point gap earth protective device
Technical field
The invention belongs to power industry equipment, in particular to a kind of totally enclosed type neutral point gap earth protective device.
Background technique
Currently, transformer neutral point protection mainly uses arrester and guarantor in the electric system of China 110KV-220KV The mode of gap parallel running is protected, existing neutral point protecting device is exposed outside, in the feelings of bad weather such as wind and rain thunder and lightning Under condition, high failure rate has dispersibility, and performance is unstable, and equipment is made to cannot be guaranteed to operate normally.
Summary of the invention
It is an object of the invention to overcome above-mentioned technical deficiency, provide a kind of stability it is high, it is safe and reliable, from extraneous ring The totally enclosed type neutral point gap earth protective device that border influences.
The present invention solve technical problem the technical solution adopted is that: totally enclosed type neutral point gap earth protective device includes Bracket, arrester, cable tank body, oil-gas casing, shell, disc insulator, current transformer one, two, gas gauge, it is special Point is to fix right angle seat with bolt and nut above two parallel vertical brackets, uses spiral shell in the right angle seat above left side brackets Shell right end and basin are fixed with bolt and nut in the right angle seat above right support in the fixed crank arm box of bolt nut and shell left side Formula insulator is fixed with current transformer one above shell, and portion top is equipped with manual regulating device in the housing, manually Regulating device adjusts inner conductor and connects the gap between conductor four, and middle is axially correspondingly provided with spring touch finger in shell, The spring touch finger on right side connects conductor three by the connection conductor five of right end in connection three horizontal connection disc insulator of conductor Above vertical direction with connect conductor four and be fixedly connected, lower section is fixedly connected with conductor six is connect, connection five horizontal connection of conductor Guide rod, guide rod outside socket connection transition conductor are correspondingly provided with oil-gas casing, oil gas set in the right end of connection transition conductor The right end of pipe is placed in transformer interface, and oil-gas casing is placed in cable tank body, and cable tank body is right in disc insulator Side is equipped with current transformer two on the excircle of cable tank body, crank arm box is fixed on the left side of shell, in connecting lever It is horizontal in case to be equipped with connection conductor one, it is equipped with guide ring in connection one right side peripheral of conductor, connects one left end pin shaft of conductor Hinge connective pole, the connecting lever in the left end of connecting rod is connected with pin shaft, another end pin shaft and card mat and connecting rod of interior connecting lever The top of mechanism is flexibly connected, and the lower end of link mechanism is hinged outer connecting lever with pin shaft, and the lateral surface of outer connecting lever is equipped with cover board, Outer connecting lever and link mechanism are connected on electromotor operating mechanism, in the housing between lower section be fixedly connected with arrester, connecting Place is external to be equipped with shielding case.
The beneficial effects of the present invention are: totally enclosed type neutral point gap earth protective device collection earthing switch, zinc oxide are kept away The electrical equipments such as thunder device, discharging gap and current transformer are installed in closed cavity in the complete set of equipments of one, are had high steady It is qualitative, not by external environment influence, the characteristics of installation and debugging are convenient, high reliablity.Grounding protection device of neutral point mainly uses Stick discharging gap mode, discharge voltage accuracy rate is high, dispersibility is small, with the Insulation Coordination of lightning arrester characteristic and main transformer essence Really, sufficiently effectively, thermal capacity is big, is unlikely to be burnt.Improve protection safety and protecting effect.Grounding protection device of neutral point is adopted With stick gap.Arrester and earthing switch can be matched according to requirement of engineering any combination.The movement of earthing switch also can be by electricity The selection of power service requirement is operated using manually or electrically mechanism.
Detailed description of the invention
It is illustrated below in conjunction with attached drawing with embodiment.
Fig. 1 is totally enclosed type neutral point gap earth protective device structure chart.
In figure, 1- crank arm box;Connecting lever in 2-;3- connecting rod;4- connection conductor one;5- guide ring;6- spring touch finger;7- connection Conductor two;8- current transformer one;8-1- current transformer two;9- connection conductor three;10- shell;11- manual regulating device; 12- connection conductor four;13- disc insulator;14- connection conductor five;14-1- connection conductor six;15- guide rod;16- was connected Cross conductor;17- cable tank body;18- oil-gas casing;19- transformer interface;20- gas gauge;21- link block;22- inflation Valve;23- adsorption box;23-1 adsorbs cassette holder;24- bracket;The right angle 24-1- seat;25- arrester;26- shielding case;27- connecting rod machine Structure;28- card mat;29- electromotor operating mechanism;30- cover board;The outer connecting lever of 31-.
Specific embodiment
Embodiment, referring to attached drawing 1, totally enclosed type neutral point gap earth protective device is in two parallel vertical brackets Right angle seat 24-1 is fixed with bolt and nut in 24 tops, is fixed and is turned with bolt and nut in the right angle seat 24-1 above left side brackets 24 The left side of arm case 1 and shell 10 fixes the right side of shell 10 in the right angle seat 24-1 above right side bracket 24 with bolt and nut End face and disc insulator 13.It is fixed with current transformer 1 in the top of shell 10, portion top is equipped with hand in the housing 10 Dynamic regulating device 11, middle is axially correspondingly provided with spring touch finger 6 in shell 10, and the spring touch finger 6 on right side is led by connection The connection conductor 5 14 of right end in 39 horizontal connection disc insulator 13 of body.It connects and is led in the vertical direction of conductor 39 with connection Body 4 12 is fixedly connected, and lower section is fixedly connected with six 14-1 of conductor is connect, and connects 5 14 horizontal connection guide rod 15 of conductor, guiding Socket connection transition conductor 16 outside bar 15.Oil-gas casing 18, oil-gas casing are correspondingly provided in the right end of connection transition conductor 16 18 right end is placed in transformer interface 19, and oil-gas casing 18 is placed in cable tank body 17, and cable tank body 17 is exhausted mounted in benzvalene form Right side in edge 13, is equipped with two 8-1 of current transformer on the excircle of cable tank body 17.The horizontal company of being equipped in crank arm box 1 Conductor 1 is connect, is equipped with guide ring 5 in connection one 4 right side peripheral of conductor, is equipped with connection conductor 27, connection in 5 periphery of guide ring Conductor 27 is placed in 10 left end of shell.Connect right end of one 4 left end of conductor with pin shaft hinge connective pole 3, the left end of connecting rod 3 It is hinged interior connecting lever 2 with pin shaft, another end pin shaft of interior connecting lever 2 and card mat 28 are flexibly connected with the top of link mechanism 27, The lower end of link mechanism 27 is hinged one end of outer connecting lever 31,30 activity of other end pin shaft and cover board of outer connecting lever 31 with pin shaft It is connected on the tank wall of electromotor operating mechanism 29.Lower section is fixedly connected with arrester 25 between in the housing 10, outside junction Portion is equipped with shielding case 26.Absorption cassette holder 23-1 is fixed with bolt and nut below cable tank body 17, on absorption cassette holder 23-1 Adsorption box 23 is fixed in the cable tank body 17 in face.It is fixed with fixed block 21 in the lower right-hand side of absorption cassette holder 23-1, in fixed block 21 left side is equipped with charge valve 22, is equipped with gas gauge 20 on the right side of fixed block 21.
The working principle of totally enclosed type neutral point gap earth protective device is: by electromotor operating mechanism 29 through outer connecting lever 31, link mechanism 27 drive crank arm box 1 in connection conductor 1 move along a straight line, make connect conductor 1 with connect conductor 27 through bullet Spring fingertip 6 is connected and disconnected from, and reaches ground protection effect.By manual regulating device 11 adjust inner conductor with connect conductor 4 12 Between gap, reach as defined in gap discharge protection require.It is connected through conductor and contact with conductor 39 is connect by arrester 25 Reach discharge prevention requirement.

Claims (2)

1. totally enclosed type neutral point gap earth protective device, including bracket (24), arrester (25), cable tank body (17), oil Gas bushing (18), shell (10), disc insulator (13), current transformer one (8), current transformer two (8-1), gas pressure Table (20), it is characterised in that right angle seat (24-1) is fixed with bolt and nut above two parallel vertical brackets (24), on a left side Crank arm box (1) and shell (10) left side are fixed with bolt and nut in right angle seat (24-1) above side stand (24), in right branch Shell (10) right end and disc insulator (13) are fixed with bolt and nut in right angle seat (24-1) above frame (24), in shell (10) current transformer one (8) is fixed with above, top is equipped with manual regulating device (11) in the middle part of shell (10), manually Gap regulating device (11) adjusting inner conductor and connect between conductor four (12), in the interior middle of shell (10), axially correspondence is set Have spring touch finger (6), the spring touch finger (6) on right side passes through connection conductor three (9) horizontal connection disc insulator (13) interior right end Connection conductor five (14), connect above the vertical direction of conductor three (9) with connect conductor four (12) and be fixedly connected, lower section and company It connects conductor six (14-1) to be fixedly connected, connect conductor five (14) horizontal connection guide rod (15), covered in succession outside guide rod (15) Transition conductor (16) are connect, are correspondingly provided with oil-gas casing (18) in the right end of connection transition conductor (16), the right side of oil-gas casing (18) End is placed in transformer interface (19), and oil-gas casing (18) is placed in cable tank body (17), and cable tank body (17) is mounted in benzvalene form Right side in insulator (13), is equipped with current transformer two (8-1) on the excircle of cable tank body (17), on a left side for shell (10) It is fixed on side crank arm box (1), the lower end of link mechanism (27) is hinged outer connecting lever (31) with pin shaft, outer connecting lever (31) Lateral surface is equipped with cover board (30), and outer connecting lever (31) and link mechanism (27) are connected on electromotor operating mechanism (29), in shell Arrester (25) are fixedly connected with below body (10) middle, are equipped with shielding case (26) outside junction.
2. totally enclosed type neutral point gap earth protective device according to claim 1, it is characterised in that in crank arm box (1) Middle horizontal be equipped with connects conductor one (4), is equipped with guide ring (5) in connection conductor one (4) right side peripheral, connection conductor one (4) is left End pin shaft hinge connective pole (3), connecting rod (3) left end with pin shaft connect in connecting lever (2), interior connecting lever (2) it is another End pin shaft and card mat (28) are flexibly connected with the top of link mechanism (27).
CN201710366075.5A 2017-05-23 2017-05-23 Totally enclosed type neutral point gap earth protective device Active CN107240903B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710366075.5A CN107240903B (en) 2017-05-23 2017-05-23 Totally enclosed type neutral point gap earth protective device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710366075.5A CN107240903B (en) 2017-05-23 2017-05-23 Totally enclosed type neutral point gap earth protective device

Publications (2)

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CN107240903A CN107240903A (en) 2017-10-10
CN107240903B true CN107240903B (en) 2019-02-22

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2662506Y (en) * 2003-06-10 2004-12-08 董万峰 Gas insulated metal sealing switching device
CN101621185A (en) * 2009-06-15 2010-01-06 上海安越电气工程技术有限公司 Transformer neutrality point combination electric device
CN201536079U (en) * 2009-08-27 2010-07-28 广州白云电器设备股份有限公司 Three position switch of high pressure gas-insulated switchgear device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0884413A (en) * 1994-09-12 1996-03-26 Toshiba Corp Gas-insulated switch device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2662506Y (en) * 2003-06-10 2004-12-08 董万峰 Gas insulated metal sealing switching device
CN101621185A (en) * 2009-06-15 2010-01-06 上海安越电气工程技术有限公司 Transformer neutrality point combination electric device
CN201536079U (en) * 2009-08-27 2010-07-28 广州白云电器设备股份有限公司 Three position switch of high pressure gas-insulated switchgear device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
110kV电力系统变压器中性点保护用触发控制间隙;王杰等;《哈尔滨理工大学学报》;20130430;第18卷(第2期);第57-62页

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