CN206164087U - Fuse determine module structure in arc extinction device cabinet - Google Patents
Fuse determine module structure in arc extinction device cabinet Download PDFInfo
- Publication number
- CN206164087U CN206164087U CN201621177635.XU CN201621177635U CN206164087U CN 206164087 U CN206164087 U CN 206164087U CN 201621177635 U CN201621177635 U CN 201621177635U CN 206164087 U CN206164087 U CN 206164087U
- Authority
- CN
- China
- Prior art keywords
- arc
- controller
- extinction
- utility
- model
- 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
Landscapes
- Protection Of Static Devices (AREA)
Abstract
The utility model discloses a fuse determine module structure in arc extinction device cabinet, the main control unit who sets up in the arc extinction cabinet to and each looks subassembly interior division do not set up from controller, current sensor, photosensitive sensor, ultrasonic sensor, main control unit arranges in the arc extinction cabinet, arrange 3 looks fuses upper end in from the controller, main control unit puts from the controller with each and constitutes the master slaver mode structure. The utility model discloses when system arc light ground connection, turn into metallicity ground connection fast with arc light ground connection, thoroughly eliminated the arc light grounding surge.
Description
Technical field
This utility model is related to the arc-extinction device in electrical network, and in particular to a kind of arc-extinction device cabinet Internal fuse detection components knot
Structure.
Background technology
At present, the currently running code regulation of China, the power system to 3 ~ 35kV neutral point indirect earthings connects
During earth fault, system allows to continue to run with two hours, and such as Jing higher level relevant department approval can also extend.But code is for " single
The concept of phase earth fault " is clearly defined, and such as singlephase earth fault is metallic earthing, and faulted phase voltage is reduced to zero, its
Remaining biphase voltage-to-ground will raise to line voltage UL, thus the electrical equipment of this kind of electrical network such as transformator, voltage/current mutual inductance
The insulation against ground level of device, chopper and cable etc., can meet the requirement born line voltage effect for a long time and do not damage.But
It is that, if singlephase earth fault is arc grounding, its overvoltage is generally 3.15 ~ 3.5 times of phase voltage, in so high mistake
Under voltage continuous action, the accumulation that certainly will cause solid insulation is damaged, in the sound weak link for mutually forming insulation, Jin Erfa
Open up as phase fault accident.
Traditional view thinks that 3 ~ 35kV electrical networks belong to medium voltage distribution network, and internal overvoltage amplitude is not high in such electrical network, institute
With, the principal element for jeopardizing line insulation safety is not internal overvoltage, but atmospheric over-voltage, thus take for a long time
Overvoltage protection measure only for preventing atmospheric over-voltage, technical measures to be only limitted to install various types of spark gaps,
Its protection value is higher, for internal overvoltage does not have restriction effect.
With the development of electrical network, overhead transmission line is progressively replaced by the cable run of solid insulation.Because solid insulation hits
There is the arc grounding mistake produced during single-phase intermittent arc earthing in the build-up effect worn, particularly its internal overvoltage, electrical network
Voltage and the ferro-resonance over-voltage for thus exciting, it has also become the one of this kind of electric power netting safe running is big to be threatened.Wherein with single-phase arc
Light grounding surge is the most serious.Arc grounding over-voltage can make voltage transformer that saturation occurs, and excite ferromagnetic resonance, cause electricity
Pressure transformer heavy overload, causes fuse blows of transformer or transformer to burn.Because arc grounding over-voltage continues
Time is long, and energy easily more than the ability to bear of spark gap, causes Explosion of on Arrester.
It is domestic at present mostly arc light to be solved using arc suppression coil compensation or automatic tracking and compensating formula grounding through arc mode
Grounding surge problem, its advantage is:
1st, the residual flow of trouble point is reduced, is conducive to the extinguishing of ground arc;
2nd, avoid long-time arcing and cause inter-phase arc short circuit;
3rd, for metallic earthing, system can operate with failure two hours, reduce step voltage poor;
Have the disadvantage:
1st, series resonance over-voltage and Xuhanting oral solution phenomenon are easily produced;
2nd, high voltage side of transformer is exaggerated to the transferring over-voltage of low-pressure side;
3rd, line selection device for low current sensitivity decrease or even cannot route selection is made;
When the 4th, removing to offset capacitance current with inductive current, for high frequency components during arc grounding cannot offset, because
And can not effectively limit arc grounding over-voltage;
Foreign countries take the mode of neutral-point solid ground, the country also to have minority area power grid to take Jing low resistance groundings
Mode.Although inhibiting arc grounding over-voltage, the reliability to customer power supply is sacrificed.There is single-phase connecing in this system
It is artificial without exception to increase earth current no matter whether load is important during ground, circuit breaker trip is made, expand power failure range and time.
Due to increasing fault current, when there is arc grounding, burning for trouble point can be aggravated.
Simply simply mechanical contact knocking gear completing, has the disadvantage to melt for fuse failure detection in traditional arc-extinction device
Silk fusing moment arc light interference is big, and Jing often has situation about can't detect.
The content of the invention
This utility model is directed to the problems referred to above, there is provided a kind of arc-extinction device cabinet Internal fuse detection components structure, including extinguishing arc
Cabinet(10)The master controller of interior setting(11), and each phase component(20)Inside be respectively provided with from controller(21), current sense
Device(20a), light sensor(20b), ultrasonic sensor(20c);The master controller(11)It is placed in arc extinction cabinet(10), institute
State from controller(21)It is placed in 3 phase fuse upper ends, master controller(11)Composition primary and secondary structure is put with each from controller.
Further, the master controller(11)With remote control terminal(30)It is connected.
Further, the extinguishing arc master controller(11)With fuse detection branches from controller(21)It is respectively equipped with optical fiber
Interface, electric pulse interface.
Further, the ultrasonic sensor(20c)Circuit be made up of integrated operational amplifier chip OP37
Two-stage amplifying circuit, the second order bandwidth-limited circuit being made up of integrated operational amplifier chip TL082 is constituted, the second order band logical
Filter circuit, is filtered to the signal after amplification, is then transmit to AD samplings.
Advantage of the present utility model:
This utility model to taking comprehensive descision mode on the judgment mode of fuse failure, when fuse failure moment arclight
During generation, faulted phase current reaches more than several times under normal circumstances, and air ionization produces dazzling arc light and ear-piercing ultrasound wave.
Controller more than 3 conditions as basis for estimation, sensor acquisition to data deliver to central processor comprehensive analysis and sentence
Having no progeny corresponding action of carry out again.Master controller not only passes through optical fiber and each from control communication among unit, and using standard industry 485
Interface can communicate with remote computer terminal, realize remotely control.This utility model is that a whole set of arc extinction cabinet fuse failure is protected
Shield scheme, it is not only novel effectively to the judgment mode of arc extinction cabinet Internal fuse fusing, and system run all right reliability, can extensively answer
In for mesolow power system, in time the accident of detection fuse failure, protects power grid security normally to run.
Arc grounding is rapidly converted into metallic earthing by this utility model when system occurs arc grounding, is thoroughly disappeared
Except arc grounding over-voltage.
In addition to objects, features and advantages described above, this utility model also has other purposes, feature and excellent
Point.Below with reference to figure, this utility model is described in further detail.
Description of the drawings
The accompanying drawing for constituting the part of the application is used for providing further understanding to of the present utility model, of the present utility model
Schematic description and description is used to explain this utility model, does not constitute to improper restriction of the present utility model.
Fig. 1 is the structural representation of this utility model embodiment;
Fig. 2 is the circuit theory diagrams of the ultrasonic sensor of this utility model embodiment;
Fig. 3 is the switch board inner structure schematic diagram of this utility model embodiment.
Reference:
10 be arc extinction cabinet, 11 be master controller, 20 be each phase component, 21 be from controller, 20a be current sensor, 20b
For light sensor, 20c be ultrasonic sensor, 30 be remote control terminal, 16 be wall bushing, 17 be isolation switch, 18
For fuse detection components, 19 be high-voltage and current-limitation fuse, 20 be high-tension fuse, 21 be overvoltage protection device, 22 once to disappear
Humorous device, 23 be voltage transformer, 24 be high-pressure vacuum contactor.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only to explain this
Utility model, is not used to limit this utility model.
With reference to Fig. 1 and Fig. 2, a kind of arc-extinction device cabinet Internal fuse detection components structure as depicted in figs. 1 and 2, including disappearing
Arc cabinet(10)The master controller of interior setting(11), and each phase component(20)Inside be respectively provided with from controller(21), electric current pass
Sensor(20a), light sensor(20b), ultrasonic sensor(20c);;The master controller(11)It is placed in arc extinction cabinet
(10), it is described from controller(21)It is placed in 3 phase fuse upper ends, master controller(11)Composition master-slave mode knot is put with each from controller
Structure.
From controller(21)Receive current sensor(20a), light sensor(20b), ultrasonic sensor(20c)Input
Signal be analyzed the running status for judging fuse failure, master controller(11), from controller(21)Between carry out data friendship
Mutually transmission.
The master controller(11)With remote control terminal(30)It is connected.
The extinguishing arc master controller(11)With fuse detection branches from controller(21)It is respectively equipped with optical fiber interface, electric pulse
Interface.
The ultrasonic sensor(20c)The two-stage that is made up of integrated operational amplifier chip OP37 of circuit amplify electricity
Road, the second order bandwidth-limited circuit being made up of integrated operational amplifier chip TL082 is constituted, the second order bandwidth-limited circuit,
Signal after amplification is filtered, AD samplings are then transmit to.
Master controller and multiple-limb are from adopting single mode fiber communications between controller;The master controller possesses 485 communications
Serial ports, communicates with remote computer terminal;
The light sensor OT adopts the light sensor of model PN11528.
Master controller(11)With each from controller(21)Constitute primary and secondary structure, master and slave controller(21)Between adopt
Fiber optic communication;Master controller(11)If 485 communication serial ports and remote control terminal(30)Communication, realizes remote monitoring.Master and slave control
Device processed(21)Optical fiber interface, electric pulse interface are respectively equipped with, from controller 3 phase fuses are placed in(19)Upper end(18)Place.
Fig. 2 be ultrasonic sensor ST circuit theory diagrams, on figure institute's identifier Y1 be piezoelectric ceramics, circuit mainly by
The two-stage amplifying circuit that OP37 is constituted, the second order bandwidth-limited circuit being made up of TL082.Because of the ultrasonic frequency that arclight is produced
Height, incoming signal is weaker, is millivolt level, therefore designs two-stage amplification, and about 5000 times are amplified altogether.In view of in complicated work
In making environment, in order to the sound wave for preventing different frequency is disturbed, the high accuracy bandwidth-limited circuit being made up of TL082 is devised, it is right
Signal after amplification is filtered, and is then transmit to AD samplings.
Controller output signal Jing fiber optic emitters can access light-operated switch by optical signal transmission fiber, light-operated controllable
Silicon etc..
This utility model to taking comprehensive descision mode on the judgment mode of fuse failure, when fuse failure moment arclight
During generation, faulted phase current reaches more than several times under normal circumstances, and air ionization produces dazzling arc light and ear-piercing ultrasound wave.
Controller more than 3 conditions as basis for estimation, sensor acquisition to data deliver to central processor comprehensive analysis and sentence
Having no progeny corresponding action of carry out again.Master controller not only passes through optical fiber and each from control communication among unit, and using standard industry 485
Interface can communicate with remote computer terminal, realize remotely control.This utility model is that a whole set of arc extinction cabinet fuse failure is protected
Shield scheme, it is not only novel effectively to the judgment mode of arc extinction cabinet Internal fuse fusing, and system run all right reliability, can extensively answer
In for mesolow power system, in time the accident of detection fuse failure, protects power grid security normally to run.
Arc grounding is rapidly converted into metallic earthing by this utility model when system occurs arc grounding, is thoroughly disappeared
Except arc grounding over-voltage.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit this utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (4)
1. a kind of arc-extinction device cabinet Internal fuse detection components structure, it is characterised in that including arc extinction cabinet(10)The master control of interior setting
Device processed(11), and each phase component(20)Inside be respectively provided with from controller(21), current sensor(20a), light sensor
(20b), ultrasonic sensor(20c);The master controller(11)It is placed in arc extinction cabinet(10)It is interior, it is described from controller(21)It is placed in
3 phase fuse upper ends, master controller(11)Composition primary and secondary structure is put with each from controller.
2. arc-extinction device cabinet Internal fuse detection components structure according to claim 1, it is characterised in that the master controller
(11)With remote control terminal(30)It is connected.
3. arc-extinction device cabinet Internal fuse detection components structure according to claim 1, it is characterised in that the extinguishing arc master control
Device processed(11)With fuse detection branches from controller(21)It is respectively equipped with optical fiber interface, electric pulse interface.
4. arc-extinction device cabinet Internal fuse detection components structure according to claim 1, it is characterised in that the ultrasound wave is passed
Sensor(20c)The two-stage amplifying circuit that is made up of integrated operational amplifier chip OP37 of circuit, by integrated operational amplifier core
The second order bandwidth-limited circuit that piece TL082 is constituted is constituted, and the second order bandwidth-limited circuit is filtered to the signal after amplification
Ripple, is then transmit to AD samplings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201621177635.XU CN206164087U (en) | 2016-11-03 | 2016-11-03 | Fuse determine module structure in arc extinction device cabinet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201621177635.XU CN206164087U (en) | 2016-11-03 | 2016-11-03 | Fuse determine module structure in arc extinction device cabinet |
Publications (1)
Publication Number | Publication Date |
---|---|
CN206164087U true CN206164087U (en) | 2017-05-10 |
Family
ID=58656457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201621177635.XU Active CN206164087U (en) | 2016-11-03 | 2016-11-03 | Fuse determine module structure in arc extinction device cabinet |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN206164087U (en) |
-
2016
- 2016-11-03 CN CN201621177635.XU patent/CN206164087U/en active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9219360B2 (en) | Safe quick disconnect leakage protector | |
CN102723706B (en) | PoE port overvoltage integrated protection circuit and its implementation | |
CN203589720U (en) | LED optical engine lightning protection apparatus | |
CN105846416A (en) | Lightning prevention and ground potential high-voltage counterattack suppression protection circuit of power line | |
CN203596508U (en) | Multifunctional household safety protection distribution box | |
CN201369470Y (en) | Earth-leakage protecting plug | |
CN101350514B (en) | Current-limiting arc-extinguishing shunted exciter tripping type earthing short circuit protection device | |
CN103683225A (en) | Ground fault protection method of nuclear plant low-voltage power distribution system in all power supply ranges | |
CN206164087U (en) | Fuse determine module structure in arc extinction device cabinet | |
CN219513785U (en) | Surge protection device and charging system | |
CN101877477A (en) | Leakage protection switch for preventing three-phase power circuit from generating high voltage | |
CN203826704U (en) | Tripolar-and-dipolar mutually switchable earth leakage protection plug | |
CN103887660A (en) | Earth leakage protection plug capable of being switched between three-pole mode and two-pole mode | |
CN101556300B (en) | Detection method of incorrect tripping caused by ground current invasion to differential analog channel | |
CN101877476A (en) | Protector for preventing three-phase power circuit from generating high voltage | |
CN105375436A (en) | Automatic cutoff protection apparatus and method for overtime operation of neutral-point resistor cabinet | |
CN201766509U (en) | Lightning-protection power supply device | |
CN104734128A (en) | Low-voltage distribution network null wire break protector | |
CN209150715U (en) | A kind of device for resisting strong lightning surge to prevent burning multichannel isolation ground connection | |
CN203967743U (en) | Ground connection isolating transformer is exempted from a kind of lightning protection | |
CN203278187U (en) | Broken wire protection device | |
CN200941542Y (en) | Protective breaker for fault electrical arc | |
CN202014076U (en) | Protection device for arc faults | |
CN207117178U (en) | A kind of signal Surge Protector | |
CN206697931U (en) | A kind of arc-extinguishing harmonic-eliminating and overvoltage protection |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |