CN104134576A - Three-pin reed switch type double-circuit trip node gas relay - Google Patents
Three-pin reed switch type double-circuit trip node gas relay Download PDFInfo
- Publication number
- CN104134576A CN104134576A CN201410338268.6A CN201410338268A CN104134576A CN 104134576 A CN104134576 A CN 104134576A CN 201410338268 A CN201410338268 A CN 201410338268A CN 104134576 A CN104134576 A CN 104134576A
- Authority
- CN
- China
- Prior art keywords
- tongue tube
- magnet
- framework
- pin
- common
- 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.)
- Pending
Links
Landscapes
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to the technical field of a relay, and in particular to a three-pin reed switch type double-circuit trip node gas relay which is applicable for a gas relay on electrical apparatuses such as an operating transformer or a tapping switch. The gas relay comprises a reed switch and a floater, a heavy gas protection device and a slight gas protection device are arranged in a shell of the gas relay, transformer oil is arranged in an oil pipeline in the shell, and a side inlet is arranged on the shell. On the basis of the conventional gas relay, a contact type reed switch with three metal reeds is used as a signal output node, an alarm or trip signal sent by mistake due to poor insulation outside pins can be effectively prevented, outside interference is reduced, protection reliability is enhanced, and a fault due to oil leakage of the transformer or a fault inside the transformer can be rapidly distinguished. The three-pin reed switch type double-circuit trip node gas relay has the characteristics of high insulativity of a secondary circuit, and safe and reliable use; the three-pin reed switch type double-circuit trip node gas relay is capable of avoiding false operation of the contact, is simple and reasonable in structure, obvious in effect, and is beneficial to promotion and application.
Description
Technical field
The present invention relates to a kind of technical field of relay, relate in particular to a kind of three pin tongue tube type two-way tripping operation node Buchholz relays, be applicable to the Buchholz relay on the power equipments such as operating transformer or shunting switch.
Background technology
Buchholz relay has another name called Buchholz relay, is the gas producing while utilizing power transformer interior fault and the relay moving.It is simple in structure, highly sensitive; while particularly there is turn-to-turn short circuit in Transformer Winding number of turn place seldom; internal fault loop current is very large; may cause part seriously overheated; but the curent change that projection externally goes between is less; even if at this moment high-sensitive differential protection all can not guarantee action message, but Buchholz relay can react the fault of this type delicately.Therefore, Buchholz relay remains one of requisite main protection equipment of various oil-filled transformer.
Relay is when normal operation, and its inside is full of transformer oil, and open cup is immersed in oil, and in floating position, dry-reed contact disconnects; Baffle plate parts a little with the mobile of transformer oil under the traction of sole mass and spring, and its dry-reed contact also disconnects.When transformer slight internal fault, owing to decomposing a small amount of gas producing, rise, force pasta in relay to decline thereupon, cause alleged oil in open cup with cup, to rise under the lever force of weight, and then cause the magnet connection dry-reed contact of its both sides, after action, send light gas fault-signal.When the inner generation of transformer catastrophe failure, produce strong methane gas, tank pressure is instantaneous uprushes, and produces very large oil and flows to the impact of conservator direction, because of oil stream impact baffle plate, and overcome the resistance of spring, band moving magnet moves to dry-reed contact direction, makes dry-reed contact closed, connects trip(ping) circuit, make circuit breaker trip, Here it is so-called " heavy gas ".
Operating transformer oil and on load tap changer, under high temperature and arcing, meeting is oxidized, decomposes and separates out solid free carbon, larger on oily electric property impact.Due to the exposed direct voltage that exists of tongue tube lead terminal root insulation, very easily mechanical impurities and free carbon in adsorbed oil, along with the time increases formation conduction covering, reduce the insulation property of Buchholz relay secondary circuit greatly.The reduction of Buchholz relay terminal dielectric strength very easily causes because of tongue tube lead-out wire short circuit false tripping main transformer, and to electrical network, reliable and secure stable operation brings very big hidden danger.
Existing Buchholz relay, when heavy gas action, can not be distinguished the transformer tripping operation causing due to transformer leakage of oil defect or power transformer interior fault, to when some particular case need be by heavy protection reconfiguration signal, can lose two kinds of protections so simultaneously.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of three pin tongue tube type two-way tripping operation node Buchholz relays.Its objective is and provide a kind of can reliably providing accurately to report to the police or trip signal, and it is simple in structure, safe and reliable, and than traditional Buchholz relay, can not cause because of the accumulation of its inner free charcoal insulation decline or the grounding phenomenon of binding post, can provide two kinds heavy Gas Signals to distinguish the relay of different fault types simultaneously.
The present invention is that the adopted technical scheme that achieves the above object is:
Three pin tongue tube type two-way tripping operation node Buchholz relays, comprise tongue tube and float; Heavy gaseous shield and light gas protecting device are installed in the housing of Buchholz relay, in the oil stream pipeline in housing, are provided with transformer oil, housing is provided with side entrance; Described heavy gaseous shield comprises the framework being installed in Buchholz relay housing and is installed on the lower float of framework one side, and lower float is connected with framework by floating ball rod, is connected with magnet b on the floating ball rod of lower float; Opposite side at framework is provided with three groups of tongue tubes; In oil stream pipeline, be provided with oil stream baffle plate, oil stream baffle plate is provided with magnet c, and baffle plate and lower float are fixed in same rotating shaft;
Described light gas protecting device comprises the tongue tube c that is arranged at framework top and the upper float that is arranged on framework one side; upper float is connected with framework by floating ball rod and can rotates up and down; on described floating ball rod, be connected with magnet a, upper float rotation can be with moving magnet a together to rotate.
Three groups of described tongue tubes comprise tongue tube c, tongue tube a and tongue tube b, and tongue tube c is connected to framework top, and tongue tube a is connected to framework middle part, and tongue tube b is connected to framework bottom.
Described described magnet a is positioned at tongue tube c side top, and magnet b is positioned at described tongue tube b side top.
The structure of described tongue tube a, tongue tube b and tongue tube c is three pin point type tongue tubes.
Described baffle plate and lower float are fixed in same rotating shaft, but do not form interlock, and lower float and baffle plate drive respectively magnet action separately, by the converted output signal of three pin tongue tube states separately.
Normally-closed contact in the tongue tube cavity of three groups of described tongue tubes communicates with common and forms normally closed node.If permanent magnet approaches, the normally-closed contact communicating with common disconnects, and the normally opened contact formation closed-loop path that communicates with common now.
Three contacts on three groups of described tongue tubes are: common, normally opened contact are located at a side of glass tongue tube cavity, the parallel encapsulation normally-closed contact of opposite side at glass tongue tube cavity, common communicates with normally-closed contact and forms normally closed node, if permanent magnet approaches, the normally-closed contact communicating with common and common disconnect, and original that normally opened contact obstructed with common communicates with common.Magnet leaves, and returns to again the state not having before magnet approaches.
Advantage of the present invention and beneficial effect:
The present invention is a kind of Buchholz relay; it is on the basis of conventional gas relay, to use a kind ofly to have three metal spring leaf contact type tongue tubes as signal output node; while approaching tongue tube when oil stream baffle plate drives permanent magnet to rotate like this; tongue tube by normally closed pin, disconnected and in addition pair of pins connect; can effectively prevent from causing because pin exterior insulation is bad transmit messages alert or trip signal by mistake; be reduced in because of external interference, during as vibrations, cause mistaking signal, increased the reliability of protection.Simultaneously; baffle plate and lower float are fixed on same fulcrum; but do not form each other interaction relation; lower float and baffle plate drive respectively magnet action separately; when having heavy Gas Signal to send, can distinguish rapidly due to transformer leakage of oil defect or power transformer interior fault, in addition like this; when some particular case need be by heavy protection reconfiguration signal, can not lose two kinds of protections simultaneously.
When oil stream baffle plate drives permanent magnet to rotate and while approaching tongue tube, tongue tube by normally closed pin, disconnected and in addition pair of pins connect, can effectively prevent from like this causing because pin exterior insulation is bad transmit messages alert or trip signal by mistake; Because of external interference, during as vibrations, cause wrong report to report to the police or trip signal, increased the reliability of protection; When having heavy Gas Signal to send, can distinguish rapidly due to transformer leakage of oil defect or power transformer interior fault.
It is high that the three pin point type tongue tubes that use in the present invention have secondary circuit insulativity, and during use, the high feature of security reliability, can avoid the misoperation of contact, and it is simple for structure rationally, and successful, is beneficial to and applies.
Below in conjunction with the drawings and specific embodiments, to the present invention's further detailed description in addition.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of three pin tongue tubes in the present invention.
In figure: housing 1, transformer oil 2, upper float 3, magnet a4, tongue tube a5, lower float 6, baffle plate 7, oil stream 8, oil stream pipeline 9, side entrance 10, gas 11, tongue tube cavity 12, common 13, normally-closed contact 14, normally opened contact 15, magnet c16, magnet b17, tongue tube b18, tongue tube c19, framework 20.
Embodiment
The present invention is a kind of three pin tongue tube type two-way tripping operation node Buchholz relays, as shown in Figure 1, comprises the formations such as housing 1, upper cover, upper float 3, lower float 6, baffle plate 7, tongue tube and magnet.Heavy gaseous shield and light gas protecting device are installed in the housing 1 of Buchholz relay.Oil in housing 1 flows 9 li, pipeline and is full of transformer oil 2, and housing 1 is provided with side entrance 10.
Described heavy gaseous shield comprises the framework 20 being installed in Buchholz relay housing 1 and the lower float 6 that is installed on framework 20 1 sides; lower float 6 is connected with framework 20 by floating ball rod and can rotates up and down; magnet b17 is installed on the floating ball rod of lower float 6; magnet b17 is positioned at described tongue tube b18 side top, and lower float 6 rotations can be with moving magnet b17 together to rotate.Opposite side at framework 20 is provided with three groups of tongue tubes, comprise be arranged on framework 20 tops tongue tube c19, be arranged on the tongue tube a5 at framework 20 middle parts and be arranged on the tongue tube b18 of framework 20 bottoms, the structure of described tongue tube a5, tongue tube b18 and tongue tube c19 is three pin point type tongue tubes.Described heavy gaseous shield also comprises the oil stream baffle plate 7 that is positioned at oil stream pipeline 9 medium positions; on oil stream baffle plate 7, be provided with magnet c16; baffle plate 7 is fixed in same rotating shaft with lower float 6; but do not form interlock; lower float 6 and baffle plate 7 drive respectively the action of magnet separately, by the converted output signal of three pin tongue tube states separately.
Described light gas protecting device comprises the tongue tube c19 that is arranged at framework top and the upper float 3 that is arranged on framework 20 1 sides; upper float 3 is connected with framework 20 by floating ball rod and can rotates up and down; magnet a4 is installed on described floating ball rod; magnet a4 is positioned at described tongue tube c19 side top, and upper float 3 rotations can be with moving magnet a4 together to rotate.
During the invention process, be full of transformer oil 2 in housing 1, when power transformer interior fault produces a small amount of gas, gas 11 is trapped in housing 1 top from relay transformer side entrance 10 gas coming through relays.When gas build is more, upper float 3 declines, and drives the magnet a4 that is fixed on float 3 floating ball rods to decline simultaneously, and when dropping to a certain degree, magnet a4 causes tongue tube c19 by electromagnetic force and moves, and makes transformer signal alarm.
When transformer leaks, cause oil level to decline, transformer oil 2 is run off from relay conservator side entrance 10 inflow transformers, upper float 3 declines and reaches its position of adjusting, upper float 3 can drive the magnet a4 action being fixed on floating ball rod, magnet a4 moves tongue tube a5 by magnetization, makes transformer action in alarm signal.
When transformer oil 2 serious loss, in relay, be full of air, lower float 6 is declined, drive the magnet b17 being fixed on lower float 6 floating ball rods to decline simultaneously, when dropping to a certain degree, magnet b17 causes tongue tube b18 by electromagnetic force and moves, and makes transformer action in tripping operation.
When power transformer interior fault is serious, transformer oil 2 fluctuations are larger, make transformer oil 2 enter Buchholz relay and impact baffle plate 7 from Buchholz relay transformer side entrance 10, when reaching certain flow rate, and baffle plate action.Baffle plate 7 is fixed on same fulcrum jointly with lower float 6, and the action of baffle plate 7 can drive the magnet c16 action being fixed on floating ball rod, and while acquiring a certain degree, magnet c16 causes tongue tube a5 by electromagnetic force and moves, and makes transformer action in tripping operation.
As shown in Figure 2, Fig. 2 is the structural representation of three pin tongue tubes in the present invention.Normally-closed contact 14 in the tongue tube cavity 12 of described three groups of tongue tubes communicates with common 13 and forms normally closed node.If permanent magnet approaches, the normally-closed contact 14 communicating with common 13 disconnects, and the normally opened contact 15 formation closed-loop path that communicates with common 13 now.
Principle of the present invention is as follows:
Gas gathers: when local overheating causes liquid and solid insulation, decompose gradually and generate gas.Upper float 3 falls and reaches its position of adjusting, and upper float 3 can move by band moving magnet a4, and magnet a4 moves tongue tube c19 by magnetization, makes transformer action in alarm signal.
Iknsulating liquid runs off: when seepage causes transformer oil 2, run off, upper float 3 declines and reaches its position of adjusting, and upper float 3 can be with moving magnet a4 action, and magnet a4 moves tongue tube c19 by magnetization, makes transformer action in alarm signal; When continue declining, liquid level cause lower float 6 positions to decline until when reaching it and adjusting position, lower float 6 band moving magnet c17 actions, and magnet c17 moves tongue tube c18 by magnetization, makes transformer action in trip signal.
Iknsulating liquid shoves: inner high-energy discharge produces even strong decomposition gas fast.Consequent pressure wave causes that the brute force that transformer fluid oil 2 rushes at oil conservator shoves, brute force is shoved and is rushed at the baffle plate 7 in oil stream pipeline 9, therefore the action of baffle plate 7 can be with moving magnet c16 action, and magnet c16 moves tongue tube b5 by magnetization, makes transformer action in trip signal.
As preferably, three groups of tongue tubes of the present invention are a kind of three metal spring leaf contact type tongue tubes that have, three contacts on it are: common 13, normally opened contact 15 are located at a side of glass tongue tube cavity 12, the parallel encapsulation normally-closed contact 14 of opposite side at glass tongue tube cavity 12, common 13 communicates with normally-closed contact 14 and forms normally closed node, if permanent magnet approaches, the normally-closed contact 14 communicating with common 13 disconnects with common 13, and the original normally opened contact 15 obstructed with common 13 communicates with common 13.Magnet leaves, and returns to again the state not having before magnet approaches.
As preferably, described baffle plate 7 is fixed on same fulcrum with lower float 6, but does not form each other interaction relation, and the action of baffle plate can not drive the action of lower float, and vice versa.
Claims (7)
1. three pin tongue tube type two-ways tripping operations node Buchholz relays, comprise tongue tube and float, it is characterized in that: heavy gaseous shield and light gas protecting device are installed in the housing (1) of Buchholz relay, the inner transformer oil (2) that is provided with of oil stream pipeline (9) in housing (1), housing (1) is provided with side entrance (10);
Described heavy gaseous shield comprises the framework (20) being installed in Buchholz relay housing (1) and is installed on the lower float (6) of framework (20) one sides, lower float (6) is connected with framework (20) by floating ball rod, is connected with magnet b(17 on the floating ball rod of lower float (6)); Opposite side at framework (20) is provided with three groups of tongue tubes; In oil stream pipeline (9), be provided with oil stream baffle plate (7), oil stream baffle plate (7) is provided with magnet c(16), baffle plate (7) is fixed in same rotating shaft with lower float (6);
Described light gas protecting device comprises the tongue tube c(19 that is arranged at framework top) and be arranged on the upper float (3) of framework (20) one sides; upper float (3) is connected with framework (20) by floating ball rod and can rotates up and down; on described floating ball rod, be connected with magnet a(4), upper float (3) rotates can be with moving magnet a(4) together rotate.
2. three pin tongue tube type two-ways tripping operations node Buchholz relays according to claim 1, it is characterized in that: three groups of described tongue tubes comprise tongue tube c(19), tongue tube a(5) and tongue tube b(18), tongue tube c(19) be connected to framework (20) top, tongue tube a(5) be connected to framework (20) middle part, tongue tube b(18) be connected to framework (20) bottom.
3. three pin tongue tube type two-ways tripping operations node Buchholz relays according to claim 1, is characterized in that: described described magnet a(4) be positioned at tongue tube c(19) side top, magnet b(17) be positioned at described tongue tube b(18) side top.
4. three pin tongue tube type two-ways tripping operations node Buchholz relays according to claim 1, is characterized in that: described tongue tube a(5), tongue tube b(18) and tongue tube c(19) structure be three pin point type tongue tubes.
5. three pin tongue tube type two-ways tripping operations node Buchholz relays according to claim 1, it is characterized in that: described baffle plate (7) is fixed in same rotating shaft with lower float (6), but do not form interlock, lower float (6) and baffle plate (7) drive respectively the action of magnet separately, by the converted output signal of three pin tongue tube states separately.
6. three pin tongue tube type two-way tripping operation node Buchholz relays according to claim 1, is characterized in that: the normally-closed contact (14) in the tongue tube cavity (12) of three groups of described tongue tubes communicates with common (13) and forms normally closed node; If permanent magnet approaches, the normally-closed contact (14) communicating with common (13) disconnects, and normally opened contact (15) the formation closed-loop path that communicates with common (13) now.
7. three pin tongue tube type two-ways tripping operations node Buchholz relays according to claim 1, it is characterized in that: three contacts on three groups of described tongue tubes are: common (13), normally opened contact (15) is located at a side of glass tongue tube cavity (12), the parallel encapsulation normally-closed contact of opposite side (14) at glass tongue tube cavity (12), common (13) communicates with normally-closed contact (14) and forms normally closed node, if permanent magnet approaches, the normally-closed contact (14) communicating with common (13) disconnects with common (13), and original that normally opened contact (15) obstructed with common (13) communicates with common (13), magnet leaves, and returns to again the state not having before magnet approaches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338268.6A CN104134576A (en) | 2014-07-16 | 2014-07-16 | Three-pin reed switch type double-circuit trip node gas relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338268.6A CN104134576A (en) | 2014-07-16 | 2014-07-16 | Three-pin reed switch type double-circuit trip node gas relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104134576A true CN104134576A (en) | 2014-11-05 |
Family
ID=51807216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410338268.6A Pending CN104134576A (en) | 2014-07-16 | 2014-07-16 | Three-pin reed switch type double-circuit trip node gas relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104134576A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826128A (en) * | 2015-01-07 | 2016-08-03 | 国家电网公司 | Multifunctional double-floater gas relay |
| CN106371015A (en) * | 2016-12-11 | 2017-02-01 | 国家电网公司 | Rapid operation identification method and device of gas relay |
| CN111261456A (en) * | 2020-04-08 | 2020-06-09 | 邵星源 | Gas relay |
| CN111477497A (en) * | 2020-03-18 | 2020-07-31 | 山东电力设备有限公司 | Intelligent double-floating-ball gas relay and monitoring system |
| CN111863522A (en) * | 2020-07-01 | 2020-10-30 | 国网天津市电力公司电力科学研究院 | Electronic gas relay |
| CN111863525A (en) * | 2020-07-22 | 2020-10-30 | 国网天津市电力公司电力科学研究院 | Gas relay for transformer |
| CN113539740A (en) * | 2021-08-16 | 2021-10-22 | 朗松珂利(上海)仪器仪表有限公司 | Gas relay and transformer system |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4591816A (en) * | 1985-02-07 | 1986-05-27 | Rte Corporation | Low oil trip and/or lockout apparatus |
| CN2143001Y (en) * | 1992-11-24 | 1993-09-29 | 冉平 | External-regulating gas relay |
| CN2205788Y (en) * | 1994-11-15 | 1995-08-23 | 刘维奇 | Monitor for vehicle lamp |
| EP0944150A2 (en) * | 1998-03-19 | 1999-09-22 | COMEM S.p.A. | Improved Buchholz relay |
| EP0756295B1 (en) * | 1995-07-24 | 2000-07-05 | Idef Systemes | Protection device for electric transformers |
| CN2720609Y (en) * | 2004-05-14 | 2005-08-24 | 张万隆 | Fully-enclosed transformer gas relay |
| EP1566874A2 (en) * | 2004-02-19 | 2005-08-24 | Elektromotoren und Gerätebau Barleben GmbH | Transformer protection relay |
| CN101009172A (en) * | 2006-12-12 | 2007-08-01 | 刘书敏 | Multifunctional protection device of the transformer |
| US20090277768A1 (en) * | 2008-05-08 | 2009-11-12 | Cooper Technologies Company | Low Oil Trip Assembly for a Fault Interrupter and Load Break Switch |
| CN102157299A (en) * | 2011-03-23 | 2011-08-17 | 刘畅 | Online monitoring gas relay |
| CN102856116A (en) * | 2012-09-12 | 2013-01-02 | 辽宁省电力有限公司电力科学研究院 | Double floater and double contact gas relay |
| CN204067186U (en) * | 2014-07-16 | 2014-12-31 | 国家电网公司 | Three pin tongue tube type two-way tripping operation node Buchholz relays |
-
2014
- 2014-07-16 CN CN201410338268.6A patent/CN104134576A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4591816A (en) * | 1985-02-07 | 1986-05-27 | Rte Corporation | Low oil trip and/or lockout apparatus |
| CN2143001Y (en) * | 1992-11-24 | 1993-09-29 | 冉平 | External-regulating gas relay |
| CN2205788Y (en) * | 1994-11-15 | 1995-08-23 | 刘维奇 | Monitor for vehicle lamp |
| EP0756295B1 (en) * | 1995-07-24 | 2000-07-05 | Idef Systemes | Protection device for electric transformers |
| EP0944150A2 (en) * | 1998-03-19 | 1999-09-22 | COMEM S.p.A. | Improved Buchholz relay |
| EP1566874A2 (en) * | 2004-02-19 | 2005-08-24 | Elektromotoren und Gerätebau Barleben GmbH | Transformer protection relay |
| CN2720609Y (en) * | 2004-05-14 | 2005-08-24 | 张万隆 | Fully-enclosed transformer gas relay |
| CN101009172A (en) * | 2006-12-12 | 2007-08-01 | 刘书敏 | Multifunctional protection device of the transformer |
| US20090277768A1 (en) * | 2008-05-08 | 2009-11-12 | Cooper Technologies Company | Low Oil Trip Assembly for a Fault Interrupter and Load Break Switch |
| CN102157299A (en) * | 2011-03-23 | 2011-08-17 | 刘畅 | Online monitoring gas relay |
| CN102856116A (en) * | 2012-09-12 | 2013-01-02 | 辽宁省电力有限公司电力科学研究院 | Double floater and double contact gas relay |
| CN204067186U (en) * | 2014-07-16 | 2014-12-31 | 国家电网公司 | Three pin tongue tube type two-way tripping operation node Buchholz relays |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826128A (en) * | 2015-01-07 | 2016-08-03 | 国家电网公司 | Multifunctional double-floater gas relay |
| CN105826128B (en) * | 2015-01-07 | 2018-06-19 | 国家电网公司 | Multi-functional double float gas relays |
| CN106371015A (en) * | 2016-12-11 | 2017-02-01 | 国家电网公司 | Rapid operation identification method and device of gas relay |
| CN106371015B (en) * | 2016-12-11 | 2023-09-26 | 国家电网公司 | Gas relay action rapid identification method and device |
| CN111477497A (en) * | 2020-03-18 | 2020-07-31 | 山东电力设备有限公司 | Intelligent double-floating-ball gas relay and monitoring system |
| CN111261456A (en) * | 2020-04-08 | 2020-06-09 | 邵星源 | Gas relay |
| CN111863522A (en) * | 2020-07-01 | 2020-10-30 | 国网天津市电力公司电力科学研究院 | Electronic gas relay |
| CN111863525A (en) * | 2020-07-22 | 2020-10-30 | 国网天津市电力公司电力科学研究院 | Gas relay for transformer |
| CN113539740A (en) * | 2021-08-16 | 2021-10-22 | 朗松珂利(上海)仪器仪表有限公司 | Gas relay and transformer system |
| CN113539740B (en) * | 2021-08-16 | 2024-06-11 | 朗松珂利(上海)仪器仪表有限公司 | Gas relay and transformer system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104134576A (en) | Three-pin reed switch type double-circuit trip node gas relay | |
| CN204067186U (en) | Three pin tongue tube type two-way tripping operation node Buchholz relays | |
| CN107731625A (en) | A kind of Buchholz relay | |
| AU2020216260B2 (en) | Multiple hammer blow vacuum interrupter weld breaking | |
| US20140133054A1 (en) | Safety apparatus and monitoring method for a power transformer, and related power transformer | |
| CN204289249U (en) | The vacuum interrupter of novel double-movable mechanism | |
| CN204289244U (en) | A kind of vacuum interrupter with permanent magnet mechanism | |
| CN203659733U (en) | Outdoor high-voltage demarcation vacuum circuit breaker | |
| CN104051180A (en) | 10kV pole-mounted vacuum load switch | |
| NO320723B1 (en) | Submerged transformer, self-protected by a device comprising a circuit breaker and fuses | |
| CN102856116A (en) | Double floater and double contact gas relay | |
| CN207038427U (en) | One kind can survey vacuum vacuum circuit breaker | |
| CN105655194A (en) | Double-acting vacuum arc-extinguishing chamber with permanent magnetic mechanism | |
| US9728357B2 (en) | Safety device for a power transformer, and related power transformer using such a safety device | |
| CN111863525A (en) | Gas relay for transformer | |
| CN205723317U (en) | A kind of SF preventing Burnout of Closing Coil6spring mechanism of circuit breaker shutting-brake control loop | |
| CN105719895A (en) | Vacuum arc-extinguishing chamber of novel double-acting mechanism | |
| CN204794072U (en) | Arc suppressing coil series connection switching formula self preservation protects damping device | |
| CN103887766B (en) | A kind of generator outlet breaker of parallel connection type | |
| CN104143451A (en) | High-speed earthing switch and earthing switch assembly unit with same | |
| CN205692784U (en) | A kind of intelligent breaker | |
| CN202678212U (en) | Core member of gas relay | |
| CN202855636U (en) | Double floater and double contact gas relay | |
| CN105957768A (en) | Novel sulfur hexafluoride breaker | |
| CN206116278U (en) | Intelligent vacuum circuit breaker of outdoor 12KV high pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141105 |