CN104052023A - Overload management switch for three-phase oil-immersed transformer - Google Patents
Overload management switch for three-phase oil-immersed transformer Download PDFInfo
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- CN104052023A CN104052023A CN201410259133.0A CN201410259133A CN104052023A CN 104052023 A CN104052023 A CN 104052023A CN 201410259133 A CN201410259133 A CN 201410259133A CN 104052023 A CN104052023 A CN 104052023A
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- Prior art keywords
- tripping
- phase
- transformer
- management switch
- overload
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- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 abstract 1
- 238000007726 management method Methods 0.000 description 34
- 230000002950 deficient Effects 0.000 description 7
- 230000006378 damage Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The invention provides an overload management switch for a three-phase oil-immersed transformer. The overload management switch comprises arc-extinguishing covers, current/temperature sensors, low oil level protecting mechanisms, a three-phase tripping linkage, an installation supporting plate, operating handles, installation sealing elements, switch position indicators and tripping mechanisms. The current/temperature sensors are installed on the tripping mechanisms. The tripping mechanisms are connected with the low oil level protecting mechanisms. The three tripping mechanisms are installed on the installation supporting plate and connected with one another through the three-phase tripping linkage. The operating handle is installed at the end of each tripping mechanism. The tripping mechanisms are covered with the arc-extinguishing covers. The overload management switch for the three-phase oil-immersed transformer has the advantages of having the fault analysis capability and being capable of extinguishing fault/overload current within a certain range. The overload management switch can be widely applied to 10KV power lines in rural areas and the like, enables the 10KV three-phase oil-immersed transformer to be protected intelligently in an all-around mode, and makes the 10KV three-phase oil-immersed transformer operate more safely, reliably and economically.
Description
Technical field
The present invention relates to controller switching equipment field, particularly overload management switch for a kind of threephase oil immersed transformer.
Background technology
As a kind of very important controller switching equipment, 1-10KV threephase oil immersed transformer uses in a large number in regions such as rural areas, and consumption is large, the dispersion of layouting, running environment complexity.These transformers directly and user be related, its safety and stability is very important.Along with the development of national economy, the raising of living standards of the people, power load increases very fast, simultaneously very high to power supply quality requirement, this quality to transformer itself and the very high requirement of general protection scheme proposition of transformer.
But the situation that transformer burns out, transformer fault, fault handling time are long etc. affects power supply quality and reliability happens occasionally.
At present, the external high voltage source side of transformer tank that mostly adopts 10KV threephase oil immersed transformer installs fuse switch and low-voltage load side additional and installs additional the scheme of low-voltage circuit breaker, there is some problems and defect in such scheme, the safe operation of transformer is brought to many potential harm.
Reality is in service, and problem and shortcoming that current 10KV threephase oil immersed transformer protection scheme exists are embodied in following several aspect:
Possible protection was lost efficacy: because protection equipment is all in transformer outside; related personnel may privately change the fuse specification of fuse switch or make relevant protection equipment failure; may cause the operation of transformer long term overloading; finally make transformer life greatly reduce; for operation afterwards brings potential safety hazard, even make transformer produce the serious consequence of burning.Burning of transformer also may bring its periphery personnel or house facility etc. to be affected, and produces additional loss, also makes processing/replacing time of transformer longer, affects fast recovery of power supply.
Current protection equipment cannot carry out the too high protection of temperature of oil in transformer.Long-term overload or transformer break down cause transformer oil temperature rise in the situation that cannot auto-breaking with quick isolating transformer, cannot effectively stop the expansion of fault and avoid the serious consequence that transformer burns to occur.
Current protection equipment cannot carry out the too low protection of transformer oil level.Because a lot of transformers are arranged on the fields such as road limit, road, likely can be subjected to Vehicular impact or other external force collisions, cause transformer leakage of oil (the bad oil impregnate phenomenon that also can cause of transformer-cabinet welding) or transformer to tilt, it's the end make past transformer oil level, the oil-insulation effect of internally charged part is lost, the fault such as cause that transformer punctures.After the fusing of the single-phase or two-phase of fuse switch, transformer produces phase-deficient operation situation.
Summary of the invention
The object of the invention is in order to make threephase oil immersed transformer obtain omnibearing intelligent protection, make its operation safer, more reliable, more economical, spy provides a kind of threephase oil immersed transformer overload management switch.
The invention provides a kind of threephase oil immersed transformer overload management switch, it is characterized in that: described threephase oil immersed transformer overload management switch, comprise arc-extinguish chamber 3, electric current/temperature sensor 4, low oil level protection mechanism 5, three-phase tripping operation link gear 6, support plate 7 is installed, and operating grip 8, installs seal 9, position indication 10, tripping mechanism 11;
Wherein: electric current/temperature sensor 4 is arranged on tripping mechanism 11, tripping mechanism 11 is connected with low oil level protection mechanism 5; Three tripping mechanisms 11 are arranged on to be installed on support plate 7, between three tripping mechanisms 11, connects by the three-phase link gear 6 that trips; Installation seal 9 is arranged on the end of tripping mechanism 11; Operating grip 8 is arranged on the end of tripping mechanism 11, and position indication 10 is positioned at the end of tripping mechanism 11; Arc-extinguish chamber 3 covers on tripping mechanism 11 outsides.
Described three-phase tripping operation link gear 6 is shaft-like syndeton.
Solve related personnel and privately change the protective features such as tranformer protection fuse, or defencive function was lost efficacy, make transformer occur the serious consequence without " protection ".
Solve transformer because making its life-span shorten fast or burning in the long-time too high situation of oil temperature, reduce transformer because burning the corresponding loss of generation and the impact that has a power failure.
Solve transformer while making oil level too low because of external force collision or casing seepage and still move the relevant serious consequence producing.
Solve Transformer Phase-deficient Operation, the impact that makes relevant power consumption equipment not brought by phase-deficient operation.
Overload management switch has fault breaking capacity, can extinguish the fault/overload electric current in certain limit.The Circuit Fault on Secondary Transformer electric current that fault produces that is short-circuited, or overload reaches after the numerical value of regulation, according to corresponding time current curve, electric current/temperature sensor mechanical unlocking of overload management switch, corresponding spring energy agency makes switch fast trip.The electric arc producing in moving contact in arc-extinguish chamber and fixed contact separation process extinguishes in arc-extinguish chamber particular design oil circuit.According to capacity and the short circuit current size of transformer, and consider transformer cold load pickup curve and damage curve, by selecting suitable overload management switch and protection fuse, correlation curve is effectively coordinated, just can play desirable omnibearing protection effect.
Once and because transformer overload or secondary side fault, after the tripping operation of overload management switch, overload or troubleshooting good after, after only the operating grip of overload management switch need to being resetted, operation is to " combined floodgate " position, can recover quick power supply, without searching the fuse of dimension and carrying out the replacing of fuse, also remove replacing fuse specification volume mistake from, and the stock control that fuse is carried out.
Because overload management switch is mounted in threephase oil immersed transformer fuel tank; see Fig. 1; hermetically sealed, all insulation, without exposed part; only has operating grip in casing outside; therefore; the protection main part that anyone cannot touch overload management switch, makes the protection of transformer not be subject to the impact of any foeign element.
Overload management switch causes because of leakage/leakage cause at transformer in the too low situation of oil level, and the float in low oil level protection mechanism declines, after dropping to a certain degree, and float connecting rod trigger switch tripping mechanism, the separating brake that switch trip locking are all and closing operation.Only have transformer oil to be restored to normal oil level or take additive method by float connecting rod pull-up, switch just can carry out associative operation.
When threephase oil immersed transformer occurs after single-phase or two-phase short-circuit fault because of overload or low-pressure side, corresponding overload or fault current will flow through the electric current/temperature sensor of overload management switch, electric current/the temperature sensor of overload or fault phase perceives after this electric current, tripping operation, meanwhile, due to the left and right of three-phase tripping operation link gear, make the three-phase of switch all trigger tripping mechanism simultaneously, thereby avoid a phase or two-phase to also have the phase of charging operation with tripping operation, produce phase-deficient operation.
Advantage of the present invention:
Overload management switch for threephase oil immersed transformer of the present invention, overload management switch has fault breaking capacity, can extinguish the fault/overload electric current in certain limit.The Circuit Fault on Secondary Transformer electric current that fault produces that is short-circuited, or overload reaches after the numerical value of regulation, according to corresponding time current curve, electric current/temperature sensor mechanical unlocking of overload management switch, corresponding spring energy agency makes switch fast trip.The electric arc producing in moving contact in arc-extinguish chamber and fixed contact separation process extinguishes in arc-extinguish chamber particular design oil circuit.According to capacity and the short circuit current size of transformer, and consider transformer cold load pickup curve and damage curve, by selecting suitable overload management switch and protection fuse, correlation curve is effectively coordinated, just can play desirable omnibearing protection effect.Can widely apply on the 10KV power circuits such as rural area, make 10KV threephase oil immersed transformer obtain omnibearing intelligent protection, make its operation safer, more reliable, more economical.
Brief description of the drawings
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation:
Fig. 1 is that overload management switch is arranged on schematic diagram on threephase oil immersed transformer;
Fig. 2 is threephase oil immersed transformer overload management switch right view;
Fig. 3 is threephase oil immersed transformer overload management switch front view;
Fig. 4 is threephase oil immersed transformer overload management switch left view;
In figure, 1 is threephase oil immersed transformer, and 2 is overload management switch.
Embodiment
Embodiment 1
The present embodiment provides a kind of threephase oil immersed transformer overload management switch, it is characterized in that: described threephase oil immersed transformer overload management switch, comprise arc-extinguish chamber 3, electric current/temperature sensor 4, low oil level protection mechanism 5, three-phase tripping operation link gear 6, support plate 7 is installed, and operating grip 8, installs seal 9, position indication 10, tripping mechanism 11;
Wherein: electric current/temperature sensor 4 is arranged on tripping mechanism 11, tripping mechanism 11 is connected with low oil level protection mechanism 5; Three tripping mechanisms 11 are arranged on to be installed on support plate 7, between three tripping mechanisms 11, connects by the three-phase link gear 6 that trips; Installation seal 9 is arranged on the end of tripping mechanism 11; Operating grip 8 is arranged on the end of tripping mechanism 11, and position indication 10 is positioned at the end of tripping mechanism 11; Arc-extinguish chamber 3 covers on tripping mechanism 11 outsides.
Described three-phase tripping operation link gear 6 is shaft-like syndeton.
Solve related personnel and privately change the protective features such as tranformer protection fuse, or defencive function was lost efficacy, make transformer occur the serious consequence without " protection ".
Solve transformer because making its life-span shorten fast or burning in the long-time too high situation of oil temperature, reduce transformer because burning the corresponding loss of generation and the impact that has a power failure.
Solve transformer while making oil level too low because of external force collision or casing seepage and still move the relevant serious consequence producing.
Solve Transformer Phase-deficient Operation, the impact that makes relevant power consumption equipment not brought by phase-deficient operation.
Overload management switch has fault breaking capacity, can extinguish the fault/overload electric current in certain limit.The Circuit Fault on Secondary Transformer electric current that fault produces that is short-circuited, or overload reaches after the numerical value of regulation, according to corresponding time current curve, electric current/temperature sensor mechanical unlocking of overload management switch, corresponding spring energy agency makes switch fast trip.The electric arc producing in moving contact in arc-extinguish chamber and fixed contact separation process extinguishes in arc-extinguish chamber particular design oil circuit.According to capacity and the short circuit current size of transformer, and consider transformer cold load pickup curve and damage curve, by selecting suitable overload management switch and protection fuse, correlation curve is effectively coordinated, just can play desirable omnibearing protection effect.
Once and because transformer overload or secondary side fault, after the tripping operation of overload management switch, overload or troubleshooting good after, after only the operating grip of overload management switch need to being resetted, operation is to " combined floodgate " position, can recover quick power supply, without searching the fuse of dimension and carrying out the replacing of fuse, also remove replacing fuse specification volume mistake from, and the stock control that fuse is carried out.
Because overload management switch is mounted in threephase oil immersed transformer fuel tank; see Fig. 1; hermetically sealed, all insulation, without exposed part; only has operating grip in casing outside; therefore; the protection main part that anyone cannot touch overload management switch, makes the protection of transformer not be subject to the impact of any foeign element.
Overload management switch causes because of leakage/leakage cause at transformer in the too low situation of oil level, and the float in low oil level protection mechanism declines, after dropping to a certain degree, and float connecting rod trigger switch tripping mechanism, the separating brake that switch trip locking are all and closing operation.Only have transformer oil to be restored to normal oil level or take additive method by float connecting rod pull-up, switch just can carry out associative operation.
When threephase oil immersed transformer occurs after single-phase or two-phase short-circuit fault because of overload or low-pressure side, corresponding overload or fault current will flow through the electric current/temperature sensor of overload management switch, electric current/the temperature sensor of overload or fault phase perceives after this electric current, tripping operation, meanwhile, due to the left and right of three-phase tripping operation link gear, make the three-phase of switch all trigger tripping mechanism simultaneously, thereby avoid a phase or two-phase to also have the phase of charging operation with tripping operation, produce phase-deficient operation.
Claims (2)
1. an overload management switch for threephase oil immersed transformer, it is characterized in that: described threephase oil immersed transformer overload management switch, comprise arc-extinguish chamber (3), electric current/temperature sensor (4), low oil level protection mechanism (5), three-phase tripping operation link gear (6), support plate (7) is installed, operating grip (8), seal (9) is installed, position indication (10), tripping mechanism (11);
Wherein: it is upper that electric current/temperature sensor (4) is arranged on tripping mechanism (11), and tripping mechanism (11) is connected with low oil level protection mechanism (5); Three tripping mechanisms (11) are arranged on that support plate (7) is installed is upper, between three tripping mechanisms (11) by three-phase link gear (6) connection of trip; Installation seal (9) is arranged on the end of tripping mechanism (11); Operating grip (8) is arranged on the end of tripping mechanism (11), and position indication (10) is positioned at the end of tripping mechanism (11); Arc-extinguish chamber (3) covers on tripping mechanism (11) outside.
2. according to overload management switch for threephase oil immersed transformer claimed in claim 1, it is characterized in that: described three-phase tripping operation link gear (6) is shaft-like syndeton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259133.0A CN104052023A (en) | 2014-06-11 | 2014-06-11 | Overload management switch for three-phase oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259133.0A CN104052023A (en) | 2014-06-11 | 2014-06-11 | Overload management switch for three-phase oil-immersed transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104052023A true CN104052023A (en) | 2014-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410259133.0A Pending CN104052023A (en) | 2014-06-11 | 2014-06-11 | Overload management switch for three-phase oil-immersed transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104052023A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799284A (en) * | 2016-08-31 | 2018-03-13 | 国网北京市电力公司 | High pressure protector for distribution transformer |
| CN112067930A (en) * | 2020-09-14 | 2020-12-11 | 广东电网有限责任公司电力科学研究院 | Method and device for judging overload type of distribution transformer, medium and terminal equipment |
| CN117405953A (en) * | 2023-12-15 | 2024-01-16 | 国网辽宁省电力有限公司 | On-line fault detection equipment and method for oil immersed transformer |
-
2014
- 2014-06-11 CN CN201410259133.0A patent/CN104052023A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799284A (en) * | 2016-08-31 | 2018-03-13 | 国网北京市电力公司 | High pressure protector for distribution transformer |
| CN112067930A (en) * | 2020-09-14 | 2020-12-11 | 广东电网有限责任公司电力科学研究院 | Method and device for judging overload type of distribution transformer, medium and terminal equipment |
| CN112067930B (en) * | 2020-09-14 | 2021-09-10 | 广东电网有限责任公司电力科学研究院 | Method and device for judging overload type of distribution transformer, medium and terminal equipment |
| CN117405953A (en) * | 2023-12-15 | 2024-01-16 | 国网辽宁省电力有限公司 | On-line fault detection equipment and method for oil immersed transformer |
| CN117405953B (en) * | 2023-12-15 | 2024-02-27 | 国网辽宁省电力有限公司 | On-line fault detection equipment and method for oil immersed transformer |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20140917 |