CN205753376U - Fast switching type distribution extinguishing arc line selection apparatus - Google Patents
Fast switching type distribution extinguishing arc line selection apparatus Download PDFInfo
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- CN205753376U CN205753376U CN201620553480.9U CN201620553480U CN205753376U CN 205753376 U CN205753376 U CN 205753376U CN 201620553480 U CN201620553480 U CN 201620553480U CN 205753376 U CN205753376 U CN 205753376U
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Abstract
Fast switching type distribution extinguishing arc line selection apparatus, relate to electric network protection device technique field, it is characterized in that: include disconnecting switch, split-phase earthed switch, current transformer, high-tension fuse, voltage transformer, overvoltage protection device and microcomputer ICU, one end of described disconnecting switch is sequentially connected with split-phase earthed switch summation current transformer then ground connection, between disconnecting switch and split-phase earthed switch, separate a branch road be sequentially connected with high-tension fuse, voltage transformer and microcomputer ICU, between high-tension fuse and voltage transformer, separate a branch road connect overvoltage protection device then ground connection, described microcomputer ICU is connected with split-phase earthed switch.This utility model can the most effectively control the further development of single-phase arc grounding fault, and can select faulty line rapidly and accurately, it is allowed to the capacitance current of at least 630A passes through for a long time, and protective value is not affected by electrical network scale.
Description
Technical field:
This utility model relates to electric network protection device technique field, specifically fast switching type distribution extinguishing arc line selection apparatus.
Background technology:
Along with the expansion of middle voltage distribution networks scale and enter the raising of rate, the twisted polyethylene cable consumption of solid insulation more comes
The biggest, this serves positive effect for reducing occupation of land and reduction fault rate, but the solidification insulation brought is can not
The difficult problem that extensive singlephase earth fault processes.After cable run instead of overhead transmission line, stable state capacitance current adds 25-50 times, high frequency
Current amplitude improves tens times even tens times, and is greatly prolonged action time.Cable run once occurs single-phase arc light to connect
Ground, the heat that trouble point is discharged by electric arc improves more than thousands of times than overhead system, at least several seconds dozens of minutes phase at most
Between insulate and will be destroyed.Being significantly increased of high frequency electric, ground arc is easier to extinguish at high frequency electric zero crossing, non-event
The arc grounding over-voltage of barrier phase is up to 4-7 times of phase voltage, quickly forms ground connection in the insulation weak spot flying fault phase, causes
Two differently short circuit accidents.
The raising of high frequency electric so that the condition of electric arc self-extinguish is destroyed, owing to high frequency electric can not be compensated, and
And also will leave resistive component after compensating power frequency electric capacitance current, arc suppression coil is for cable electrical network or has very much current circuit to mix
The compensation effect closing electrical network is more and more undesirable, is thought directly by fault phase by high-voltage and current-limitation fuse by split-phase vacuum contactor
, there is the risk of fuse failure of interruption when electrical network is larger in the extinguishing arc route selection decoration of ground connection principle.
Utility model content:
Technical problem to be solved in the utility model is to provide one can the most effectively control single-phase arc grounding
The further development of fault, and faulty line can be selected rapidly and accurately, it is allowed to the capacitance current of at least 630A passes through for a long time, protects
Protect the fast switching type distribution extinguishing arc line selection apparatus that performance is not affected by electrical network scale.
Technical problem to be solved in the utility model realizes by the following technical solutions:
Fast switching type distribution extinguishing arc line selection apparatus, it is characterised in that: include disconnecting switch, split-phase earthed switch, electric current
Transformer, high-tension fuse, voltage transformer, overvoltage protection device and microcomputer ICU, the one of described disconnecting switch
End is sequentially connected with split-phase earthed switch summation current transformer then ground connection, separates one between disconnecting switch and split-phase earthed switch
Bar branch road is sequentially connected with high-tension fuse, voltage transformer and microcomputer ICU, at high-tension fuse and voltage transformer
Between separate branch road and connect overvoltage protection device then ground connection, described microcomputer ICU is with split-phase earthed switch even
Connect.
Described voltage transformer two of which terminals one are directly grounded, and the other end connects the suppression of quasiconductor self-limiting
Device then ground connection.
Described high-speed switch is that eddy current drives fast chopper.
Described eddy current drives the eddy current driving means of fast chopper to include busbar, insulator, static contact, moving contact, consolidate
Determining plate and pull bar, described busbar includes two pieces and be arranged in parallel, and described insulator is fixedly installed on front side busbar and fixed plate
Between and between insulator and busbar and fixed plate formed vacuum interrupter, described static contact be fixedly installed on front side busbar on and
Being positioned at vacuum extinction chamber interior, described moving contact is connected with the busbar of rear side by hose adapter and is positioned at vacuum extinction indoor
Portion, moving contact is corresponding with static contact, and described pull bar is fixedly installed on moving contact and extends to vacuum through fixed plate and goes out
The outside of arc chamber.
Ripple hose adapter it is provided with between described moving contact and fixed plate.
When this utility model system is properly functioning, when system generation voltage gets over line, (default value is higher than rated voltage
130%, or less than the 70% of rated voltage), there is alarm signal output switch amount contact, Display panel fault in device meeting
Time, type and each phase voltage.During system generation singlephase earth fault, then within 20ms, control fault phase earthed switch close
Lock, is directly grounded fault phase, extinguishing ground arc, and arc grounding over-voltage limits the level of on-Line Voltage, controls event
The development of barrier.Small current line selection module is maximum according to only faulty line zero-sequence current change before and after arc extinction simultaneously, rather than
Faulty line is basically unchanged such key character (i.e. maximal increment principle), provides fault wire size rapidly and accurately.When system is sent out
During raw disconnection fault, device can send alarm signal output switch amount contact, in order to client is to likely leading because of broken string operation
The relay protection causing misoperation carries out locking.
The beneficial effects of the utility model are: this utility model can the most effectively control entering of single-phase arc grounding fault
One step development, and faulty line can be selected rapidly and accurately, it is allowed to the capacitance current of at least 630A passes through for a long time, and protective value is not
Affected by electrical network scale.
Accompanying drawing illustrates:
Fig. 1 is this utility model principle wiring schematic diagram.
Fig. 2 is this practicality eddy current driving means schematic diagram.
Detailed description of the invention:
For the technological means making this utility model realize, creation characteristic, reach purpose and be easy to understand with effect, under
Face combines and is specifically illustrating, and this utility model is expanded on further.
As it is shown in figure 1, fast switching type distribution extinguishing arc line selection apparatus, including disconnecting switch GN, split-phase earthed switch JZ, electricity
Current transformer LH, high-tension fuse RD, voltage transformer YH, overvoltage protection device TBP and microcomputer ICU ZK, keep apart
The one end closing GN is sequentially connected with split-phase earthed switch JZ summation current transformer LH then ground connection, disconnecting switch GN and split-phase ground connection
Separate a branch road between switch JZ and be sequentially connected with high-tension fuse RD, voltage transformer YH and microcomputer ICU ZK,
Separating a branch road between high-tension fuse RD and voltage transformer YH and connect overvoltage protection device TBP then ground connection, microcomputer is combined
Hop controller ZK is connected with split-phase earthed switch JZ.Voltage transformer YH two of which terminals one are directly grounded, the other end
Connect quasiconductor self-limiting suppressor DR then ground connection.
As in figure 2 it is shown, high-speed switch is eddy current drives fast chopper.Eddy current drives the eddy current of fast chopper to drive dress
Putting and include busbar 1, insulator 2, static contact 3, moving contact 4, fixed plate 5 and pull bar 6, busbar bag 1 includes two pieces and be arranged in parallel, insulator
2 are fixedly installed between front side busbar 1 and fixed plate 5 and form vacuum interrupter 7 between insulator 2 and busbar 1 and fixed plate 5,
Static contact 3 is fixedly installed on the busbar 1 of front side and is positioned at vacuum interrupter 7 inside, and moving contact 4 is by hose adapter 8 and rear side
Busbar 1 connects and is positioned at vacuum interrupter 7 inside, and moving contact 4 is corresponding with static contact 3, and pull bar 6 is fixedly installed on moving contact 4
The outside of vacuum interrupter 7 above and is extended to through fixed plate 5.Ripple hose adapter 9 it is provided with between moving contact 4 and fixed plate 5.
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described.One's own profession
Skilled person will appreciate that of industry, this utility model is not restricted to the described embodiments, described in above-described embodiment and description
Principle of the present utility model is simply described, on the premise of without departing from this utility model spirit and scope, this utility model is also
Have various changes and modifications, in the range of these changes and improvements both fall within claimed this utility model.This utility model
Claimed scope is defined by appending claims and equivalent thereof.
Claims (5)
1. fast switching type distribution extinguishing arc line selection apparatus, it is characterised in that: include that disconnecting switch, split-phase earthed switch, electric current are mutual
Sensor, high-tension fuse, voltage transformer, overvoltage protection device and microcomputer ICU, one end of described disconnecting switch
It is sequentially connected with split-phase earthed switch summation current transformer then ground connection, between disconnecting switch and split-phase earthed switch, separates one
Branch road is sequentially connected with high-tension fuse, voltage transformer and microcomputer ICU, high-tension fuse and voltage transformer it
Between separate branch road and connect overvoltage protection device then ground connection, described microcomputer ICU is with split-phase earthed switch even
Connect.
Fast switching type distribution extinguishing arc line selection apparatus the most according to claim 1, it is characterised in that: described mutual induction of voltage
Device two of which terminals one are directly grounded, and the other end connects quasiconductor self-limiting suppressor then ground connection.
Fast switching type distribution extinguishing arc line selection apparatus the most according to claim 1, it is characterised in that: described high-speed switch
Fast chopper is driven for eddy current.
Fast switching type distribution extinguishing arc line selection apparatus the most according to claim 3, it is characterised in that: described eddy current drives
The eddy current driving means of fast chopper includes busbar, insulator, static contact, moving contact, fixed plate and pull bar, described busbar bag
Including two pieces and be arranged in parallel, described insulator is fixedly installed between front side busbar and fixed plate and insulator and busbar and fixed plate
Between formed vacuum interrupter, described static contact be fixedly installed on front side busbar on and be positioned at vacuum extinction chamber interior, described
Moving contact be connected with the busbar of rear side and be positioned at vacuum extinction chamber interior by hose adapter, moving contact is corresponding with static contact,
Described pull bar is fixedly installed on moving contact and extends to the outside of vacuum interrupter through fixed plate.
Fast switching type distribution extinguishing arc line selection apparatus the most according to claim 4, it is characterised in that: described moving contact with
Ripple hose adapter it is provided with between fixed plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620553480.9U CN205753376U (en) | 2016-06-08 | 2016-06-08 | Fast switching type distribution extinguishing arc line selection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620553480.9U CN205753376U (en) | 2016-06-08 | 2016-06-08 | Fast switching type distribution extinguishing arc line selection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205753376U true CN205753376U (en) | 2016-11-30 |
Family
ID=57359942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620553480.9U Active CN205753376U (en) | 2016-06-08 | 2016-06-08 | Fast switching type distribution extinguishing arc line selection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205753376U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469586A (en) * | 2018-06-04 | 2018-08-31 | 沈阳工业大学 | A kind of inspection of high speed grounding switch Interruption performance and judgment means and method |
| CN112557829A (en) * | 2020-12-17 | 2021-03-26 | 安徽昊沃电力科技有限公司 | Instantaneous grounding current injection method line selection device for medium-voltage power grid |
-
2016
- 2016-06-08 CN CN201620553480.9U patent/CN205753376U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469586A (en) * | 2018-06-04 | 2018-08-31 | 沈阳工业大学 | A kind of inspection of high speed grounding switch Interruption performance and judgment means and method |
| CN108469586B (en) * | 2018-06-04 | 2023-08-08 | 沈阳工业大学 | Device and method for checking and judging on-off characteristics of quick grounding switch |
| CN112557829A (en) * | 2020-12-17 | 2021-03-26 | 安徽昊沃电力科技有限公司 | Instantaneous grounding current injection method line selection device for medium-voltage power grid |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |