CN201278455Y - Large capacity high voltage current limiting protection apparatus - Google Patents
Large capacity high voltage current limiting protection apparatus Download PDFInfo
- Publication number
- CN201278455Y CN201278455Y CNU2008202015586U CN200820201558U CN201278455Y CN 201278455 Y CN201278455 Y CN 201278455Y CN U2008202015586 U CNU2008202015586 U CN U2008202015586U CN 200820201558 U CN200820201558 U CN 200820201558U CN 201278455 Y CN201278455 Y CN 201278455Y
- Authority
- CN
- China
- Prior art keywords
- current
- voltage
- breaker
- protector
- vacuum circuit
- 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.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
A high-capacity high-voltage current-limiting protector comprises a high-voltage current-limiting fuse protector, a high-voltage high-energy zinc oxide overvoltage protector, a vacuum circuit breaker and a limit switch, wherein the high-voltage current-limiting fuse protector is connected with the high-voltage high-energy zinc oxide overvoltage protector in parallel and then is connected with the vacuum circuit breaker in series; and the high-voltage current-limiting fuse protector is linked with the limit switch which can combine and jump the vacuum breaker. The utility model has the advantages that any operation of outside electromechanical protective equipment is not needed, the reliability of action is very high, and the phenomenon of refusing action and false action can not generate; the action speed of the high-voltage current-limiting fuse protector is far higher than that of a mechanical circuit breaker so that a transformer, a voltage transformator, a capacitor, and the like are not impacted by short circuit summit current and the damage of electromechanical equipment caused by impact of several cycle high-current is avoided; the electromechanical equipment such as the transformer, the voltage transformator, the capacitor, and the like is ensured not to explode to crake caused by the impact of high-current, and the problem of dynamo thermostabilization is not needed to be considered when a bus bar is connected.
Description
Technical field
The utility model relates to a kind of protective device that a kind of bulk power system volitional check short circuit current and fast and reliable when being short-circuited are cut-off, more specifically to a kind of big capacity high current-limiting protection device.
Background technology
Along with the development of electric power system and modernization industry, single-machine capacity constantly increases, and low-resistance Chinese People's Anti-Japanese Military and Political College capacity power source and the application of load in modernized electrical power trans mission/distribution system constantly increase, and the continuous development of distribution network, and the capacity of short circuit of electric power system is increased day by day.At present, the electric power branch road of electric equipment such as range transformer, capacitor in the electric power system, electric current is less under the normal operating conditions, in a single day the impedance owing to its loop when being short-circuited is very little, thereby short circuit current is big especially, particularly is connected to the power consumption equipment on the large and medium generator bus, and short circuit current is bigger, may surpass 50kA, this will cause very big difficulty to selecting to cut-off protection equipment; Traditional cut-offfing of the protection equipment that cut-offs (as vacuum circuit-breaker, SF6 circuit breaker etc.) reaches a few tens of milliseconds operate time simultaneously, the amplitude of limiting short-circuit current fast and effeciently, especially big short circuit current is to the insulation of electric equipments such as generator, the transformer destruction that will impact; To moving stable, thermally-stabilised the having higher requirement of other equipment of system, must increase the investment of equipment in addition, and dangerous.
But, traditional protection equipment such as vacuum circuit-breaker of cut-offfing, general drop-out current is 31.5kA, maximum 40～50kA, but price is extremely expensive.
Summary of the invention
The purpose of this utility model is that prior art is improved, and a kind of big capacity high current-limiting protection device is provided, and can cut-off big short circuit current, cut-off quick action, and possess over-voltage protection function, and the technical scheme of employing is as follows:
Big capacity high current-limiting protection device of the present utility model; comprise high-voltage and current-limitation fuse, high pressure high energy ZnO overvoltage protector, vacuum circuit-breaker, limit switch; it is characterized in that: high-voltage and current-limitation fuse is in parallel with high pressure high energy ZnO overvoltage protector; connect with vacuum circuit-breaker then; high-voltage and current-limitation fuse and limit switch interlock, limit switch can join the jumping vacuum circuit-breaker.
Described high pressure high energy ZnO overvoltage protector is the high pressure high energy type zinc oxide piezoresistor.
The fault in case be short-circuited in the loop, high-voltage and current-limitation fuse is quick fuse in 2ms, cutting-off of short-circuit electric current immediately, be connected in parallel on the special high pressure high energy ZnO piezo-resistance in high-voltage and current-limitation fuse two ends (energy-absorbing capacity 〉=500kJ) action simultaneously, the switching overvoltage that produces when fuse is cut-off is limited in the setting, and the magnetic field energy when cut-off current decays to zero in the absorption system has further improved the energy-absorbing safe allowance of fuse; High-voltage and current-limitation fuse limit switch when cut-offfing sends actuating signal, can receive on-load switch or circuit breaker intertrip or send signals to night shift room, so that in time overhaul, search the fault point.
Whether charged in order to detect in the loop, avoid that the user is charged to carry out Operation and maintenance, described big capacity high current-limiting protection device also comprises electrification display, electrification display one end connects vacuum circuit-breaker output, other end ground connection.
The utility model beneficial effect against existing technologies is:
1, the operating chacteristics owing to high-voltage and current-limitation fuse is guaranteed by its intrinsic ampere-time characteristic, need not the mechanical and electrical protection operation of equipment in any external world, so the reliable in action of high-voltage and current-limitation fuse is high, can not produce tripping and malfunction phenomenon.High-voltage and current-limitation fuse does not have movable member, so need not safeguard yet.
2, the responsiveness of high-voltage and current-limitation fuse is far above mechanical chopper, short circuit current does not rise as yet and just is cut off, current amplitude can be restricted to less than about 15% of prospective short circuit current transient peaks, time is no more than 2ms, make electric equipments such as transformer, voltage transformer and capacitor no longer be subjected to the impact of short circuit peak, avoided the damage of the electric equipment that causes because of several cycle heavy current impacts; Because the current limliting of high-voltage and current-limitation fuse and rapidity make I
2T is very little, can guarantee that electric equipments such as transformer, voltage transformer and capacitor can not burst because of heavy current impact, and the connection busbar must not considered the dynamic and thermal stability problem.
The big capacity high current-limiting protection device of this programme mainly is applicable to the circuit that has big capacity of short circuit in 3 ~ 35kV electric power system, for example: loops such as excitation transformer, station transformer, isolating transformer, voltage transformer and capacitor; Can bear the frequent connection of running current and cut-off, simultaneously can the volitional check electric current to especially big short circuit current and fast and reliable ground cut-off and overvoltage protection, also can be as the phase fault protection and the backup protection of power circuit.
Description of drawings
Accompanying drawing is the circuit theory schematic diagram of the utility model preferred embodiment.
Embodiment
As shown in drawings; big capacity high current-limiting protection device in the present embodiment; comprise high-voltage and current-limitation fuse 1, high pressure high energy ZnO overvoltage protector 2, vacuum circuit-breaker 3, limit switch; high-voltage and current-limitation fuse 1 is in parallel with high pressure high energy ZnO overvoltage protector 2; connect with vacuum circuit-breaker 3 then; high-voltage and current-limitation fuse 1 and limit switch 4 interlocks, limit switch 4 can join jumps vacuum circuit-breaker 3.When using, big capacity high current-limiting protection device is connected with power consumption equipment 7, and vacuum circuit-breaker 3 is electrically connected with bus 6.
In addition, also comprise electrification display 5, electrification display 5 one ends connect vacuum circuit-breaker 3 outputs, other end ground connection.
Described vacuum circuit-breaker 3 is mainly as stopping to send the electricity operation normally, and uses as electrical isolation when maintenance.
Big capacity high current-limiting protection device in the present embodiment mainly utilizes the arc voltage of fuse failure moment afterflow electric arc to limit with cutting-off of short-circuit electric current and carries out overvoltage protection.Arc voltage is not high more good more, and too high arc voltage is a kind of switching overvoltage, and the insulation of the badly damaged electric equipment of meeting makes accident enlarge equally.For this reason, in high-voltage and current-limitation fuse 1 two ends parallel connection special high pressure high energy type zinc oxide piezoresistor (being exactly high pressure high energy ZnO overvoltage protector 2).When the Zinc-oxide piezoresistor both end voltage is elevated to certain value, transfer conducting to by ending automatically, over-voltage does not make its destruction apparatus insulated, and piezo-resistance conducting shunting simultaneously reduces the energy that fuse absorbs.High pressure high energy type zinc oxide piezoresistor in parallel makes the work of protector more safe and reliable.
Claims (3)
1, a kind of big capacity high current-limiting protection device; comprise high-voltage and current-limitation fuse, high pressure high energy ZnO overvoltage protector, vacuum circuit-breaker, limit switch; it is characterized in that: high-voltage and current-limitation fuse is in parallel with high pressure high energy ZnO overvoltage protector; connect with vacuum circuit-breaker then; high-voltage and current-limitation fuse and limit switch interlock, limit switch can join the jumping vacuum circuit-breaker.
2, big capacity high current-limiting protection device as claimed in claim 1 is characterized in that: described high pressure high energy ZnO overvoltage protector is the high pressure high energy type zinc oxide piezoresistor.
3, big capacity high current-limiting protection device as claimed in claim 2 is characterized in that: described big capacity high current-limiting protection device also comprises electrification display, and electrification display one end connects vacuum circuit-breaker output, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202015586U CN201278455Y (en) | 2008-10-08 | 2008-10-08 | Large capacity high voltage current limiting protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202015586U CN201278455Y (en) | 2008-10-08 | 2008-10-08 | Large capacity high voltage current limiting protection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201278455Y true CN201278455Y (en) | 2009-07-22 |
Family
ID=40896045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202015586U Expired - Fee Related CN201278455Y (en) | 2008-10-08 | 2008-10-08 | Large capacity high voltage current limiting protection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201278455Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959847A (en) * | 2010-06-25 | 2013-03-06 | 东芝三菱电机产业系统株式会社 | Power conversion apparatus |
| CN104054224A (en) * | 2011-12-23 | 2014-09-17 | Abb技术股份公司 | Low-, medium-, or high-voltage switchgear |
| CN106451344A (en) * | 2015-08-07 | 2017-02-22 | 菲尼克斯电气公司 | Protective circuit assembly |
-
2008
- 2008-10-08 CN CNU2008202015586U patent/CN201278455Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959847A (en) * | 2010-06-25 | 2013-03-06 | 东芝三菱电机产业系统株式会社 | Power conversion apparatus |
| CN102959847B (en) * | 2010-06-25 | 2016-01-13 | 东芝三菱电机产业系统株式会社 | Power conversion device |
| CN104054224A (en) * | 2011-12-23 | 2014-09-17 | Abb技术股份公司 | Low-, medium-, or high-voltage switchgear |
| CN106451344A (en) * | 2015-08-07 | 2017-02-22 | 菲尼克斯电气公司 | Protective circuit assembly |
| CN106451344B (en) * | 2015-08-07 | 2019-08-02 | 菲尼克斯电气公司 | A kind of protection circuit device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103208788B (en) | Intelligent Dynamic power network neutral point earthing method and the complete sets of equipment | |
| CN104821563A (en) | Zero-loss depth current-limiting protection device | |
| CN201846069U (en) | Arc light protector | |
| CN102222893B (en) | A kind of fast failure demand limiter based on current-carrying isolator | |
| CN203278210U (en) | Busbar residual voltage maintaining device | |
| CN201199632Y (en) | Parallel capacitor apparatus with dual over-voltage protection | |
| CN201138751Y (en) | Earthing set equipment combining power grid controllable reaction with small resistance | |
| CN102931648A (en) | Bus residual voltage holding device | |
| CN101350514B (en) | Current-limiting arc-extinguishing shunted exciter tripping type earthing short circuit protection device | |
| CN201278455Y (en) | Large capacity high voltage current limiting protection apparatus | |
| CN202353174U (en) | Combined protector of high-voltage current limiting fuse | |
| CN203180518U (en) | Intelligent switch arc-extinguishing and overvoltage-protecting device | |
| CN201478821U (en) | Overvoltage protector for indirect neutral point-grounding power system in three-phase power grid | |
| CN201061141Y (en) | Armoured withdraw type arc extinguishing switch device | |
| CN102290805A (en) | Electric arc grounding overvoltage limiting device applied to medium-voltage distribution system | |
| CN103001194A (en) | On-line line fault monitoring and protection device and protection method thereof | |
| CN202712836U (en) | Grounded-neutral system | |
| CN202917965U (en) | Busbar residual voltage maintaining device | |
| CN201260077Y (en) | Arc extinguishing device grounded through high frequency damp element | |
| CN201611763U (en) | Intelligent type fast current-limiting protection device with large capacity | |
| CN203193273U (en) | Intelligent turn-adjustment arc-extinguishing voltage-limiting device | |
| CN201388042Y (en) | Central high-voltage switch equal-height cabinet | |
| CN201294378Y (en) | Switch arc-extinguishing and over-voltage protection | |
| CN2726190Y (en) | Large capacity high-voltage current-limiting fuse combination protector | |
| CN203674700U (en) | Photoelectric arc light protection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20171008 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |