CN106920607A - A kind of clearance control type metal oxide arrester - Google Patents
A kind of clearance control type metal oxide arrester Download PDFInfo
- Publication number
- CN106920607A CN106920607A CN201511001303.6A CN201511001303A CN106920607A CN 106920607 A CN106920607 A CN 106920607A CN 201511001303 A CN201511001303 A CN 201511001303A CN 106920607 A CN106920607 A CN 106920607A
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- China
- Prior art keywords
- arrester
- metal oxide
- porcelain knob
- control type
- unit section
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
- H01C7/123—Arrangements for improving potential distribution
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C1/024—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being hermetically sealed
- H01C1/026—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being hermetically sealed with gaseous or vacuum spacing between the resistive element and the housing or casing
Abstract
The present invention provides a kind of clearance control type metal oxide arrester, the unit section that the arrester is sequentially connected in series including vertical direction, and the unit section includes outside insulating sleeve and the metal oxide resistance in the insulating sleeve；The base unit section two ends of the arrester are parallel with control unit, and described control unit includes the controller in gap and the connection gap；The controller detects the voltage at the arrester two ends, and the conducting in the gap is triggered according to the magnitude of voltage for detecting, and when the gap turns on, the base unit section is shorted.The arrester that the present invention is provided can reduce residual voltage of arrester on the basis of maintaining existing arrester metal oxide resistance performance parameter constant, improve the level of protection and anti-seismic performance of arrester.
Description
Technical field
The present invention relates to a kind of arrester, in particular to a kind of metal oxide arrester of clearance control type.
Background technology
Since super-pressure (330kV~750kV) transmission system, switching overvoltage to the dielectric level of power transmission and transforming equipment
Control action is played, with the rising of system voltage grade, influences increasing, switching overvoltage multiple must limited
It is more and more lower.In super, system for ultra-high voltage transmission, the switching impulse sparkover voltage of the air gap is presented saturated characteristic, behaviour
Make cost and manufacture difficulty influence of the overvoltage level on power transmission and transforming equipment bigger, therefore, depth reduction switching overvoltage times
Number, the apparatus insulated level of Rational choice are very necessary.
Arrester is the main device of Hyper-Voltage of Power Systems protection.Arrester resistor disc is main with carborundum (SiC) from early stage
Raw material is developed into now with zinc oxide (ZnO) as primary raw material, and the performance of arrester is greatly improved between decades,
Range of application is more and more wider.
Grading ring of the extra-high voltage conventional metal oxides arrester by lightning arrester body and at the top of lightning arrester body is constituted.Its
Operation principle is, using the characteristic that low resistance is presented under metal oxide resistance high voltage, to be released by lightning arrester body overdischarged
Pressure energy amount, relatively low numerical value is restricted to by system overvoltage level.
In recent years, researcher have developed performance more superior by improving the formula and production technology of metal oxide resistance
High performance metal-oxide resistor disc, wherein Toshiba Corp develop resistance piece performance be in world lead level, mainly
Index is：Energy absorption capability is 300J/cm3, pressure ratio 1.55 under nominal current, it is allowed to chargeability 92%, electric potential gradient 200~
600V/mm.In extra-high voltage system, only by the arrester using high performance resistor piece, switching overvoltage level cannot still be limited
To the numerical value of regulation.
For ultra-high voltage AC transmission system, presently mainly applied metal Oxide Arrester, breaker installs switching-on resistance two additional
The measure of kind：
(1) metal oxide arrester and breaker install two kinds of measures of switching-on resistance additional and are used in combination.Both can will be at collective effect
Maximum relatively 2% statistical switching overvoltage of system is limited in 1.6p.u.~1.7p.u..But, because switching-on resistance is in operation
Reliability and economy aspect still suffer from larger deficiency, and mechanism is complicated after breaker installs switching-on resistance additional, greatly increases breaker
Operation risk, while cost increases more after breaker installs switching-on resistance additional, Operation of Electric Systems department and manufacturer are inclined to
Breaker does not use switching-on resistance in the case of being allowed in system condition.
(2) when the circuit between two ultra-high voltage transformer stations is shorter, by the reduction of arrester rated voltage, it is also possible to which system is grasped
1.6p.u.~1.7p.u. is limited in as overvoltage.For example, certain extra high voltage line section is only 60km, if not using breaker to add
Dress switching-on resistance, limits to standard permission switching overvoltage only with metal oxide arrester, must aoxidize metal
The rated voltage of thing arrester is down to 804kV (rated voltage has reduced by 3%) from current 828kV, and the chargeability of arrester will
0.79 is increased to from current 0.77.But the circuit of any is grown again, even if arrester rated voltage is down into 804kV also cannot
Meet and require.Such as certain extra high voltage line length is 85.5km, and being only capable of the overvoltage by along using the arrester of 804kV is down to
1.74p.u., still cannot meet requirement, it is necessary to be down to the rated voltage of arrester lower, or even need to be down to 762kV (volumes
Determine voltage and reduce that requirement 8%) could be met.Now the longtime running chargeability of arrester will be increased to 0.83 from current 0.77,
So that arrester resistor disc aging speed under normal operation is accelerated, reliability margin is substantially reduced.And use 762kV
The precondition of arrester must also be that system power-frequency overvoltage is limited in into bus bar side 1.2p.u., line side 1.3p.u., use
Condition is extremely limited.
While arrester resistor disc performance study is improved, researcher also attempts to find new breakthrough in the structure of arrester,
To improve the protective value of arrester.The eighties, the researcher of home and abroad once to metal oxide arrester string and
Join discharging gap situation carried out inquire into and study, but be limited to the dispersiveness of gap discharge voltage be difficult solve, arrester work
Poor reliability.
The content of the invention
In order to solve the above-mentioned deficiency in the presence of prior art, the present invention provides a kind of clearance control type metal oxide arrester,
It is combined by the way that a kind of metal oxide arrester is triggered into control technology with gap, is drawn a kind of for system for ultra-high voltage transmission
Control type metal oxide arrester, this technical scheme maintaining existing arrester metal oxide resistance performance parameter
On the basis of constant, it is possible to decrease residual voltage of arrester, the level of protection of arrester is improved.
The present invention provide technical scheme be：A kind of clearance control type metal oxide arrester, the arrester includes side vertically
To the unit section being sequentially connected in series, the unit section includes outside insulating sleeve and the metal oxidation in the insulating sleeve
Thing resistor disc；It is theed improvement is that：The base unit section two ends of the arrester are parallel with control unit, described control unit
Controller including gap and the connection gap；The controller detects the voltage at the arrester two ends, and according to detecting
Magnitude of voltage trigger the conducting in the gap, when the gap turns on, the base unit section is shorted.
Preferably, when the voltage that the controller detects arrester two ends is more than or equal to 1257.2KV, the controller is touched
Conducting of sending out gap described.
Preferably, the exterior insulation set includes the ring flange at porcelain knob and porcelain knob two ends；The entirety of the arrester is in base unit
The porcelain knob cross-sectional diameter of section is maximum, the pyramidal structure of the porcelain knob cross-sectional diameter minimum of top unit section, in the case where loading condition is waited
The stress that each unit section bottom produces is consistent.
Further, the bosom of the porcelain knob has cylinder type hollow part, for accommodating metal oxide resistance, and
It is internal insulation gas filled；The insulating gas is any one in nitrogen, carbon dioxide or dry air.
Further, the outside of the porcelain knob has spaced gamp and umbellule；The horizontal range that gamp stretches out is 75mm, small
The horizontal range that umbrella stretches out is 60mm, and the distance between two closest gamp minimum points are 75mm.
Further, it is provided with the inside of the ring flange and the concentric porcelain knob mounting hole of ring flange, the hole wall of the porcelain knob mounting hole
On be coated with bitumen layer, the two ends of the porcelain knob are glued in porcelain knob mounting hole by cement glue respectively；The porcelain knob two ends
Glued position be also coated with bitumen layer；The hole wall of the porcelain knob mounting hole is provided with multiple concentric with the porcelain knob mounting hole
Annular projection.
Further, the height of porcelain knob top cement glue in the vertical direction and corresponding porcelain knob outer dia ratio equal to or
More than 0.40；The height of the porcelain knob bottom cement glue in the vertical direction and the ratio of corresponding porcelain knob outer dia be equal to or
More than 0.45.
Preferably, the bottom flange dish of the bottom of the metal oxide resistance and unit section is fixed using directly crimping mode,
It is provided with compressive state by pressing spring between its top and the top flange dish of unit section.
Further, it is correspondingly provided with fixation of the vertical direction through the ring flange in the bottom flange dish and the top flange dish
Hole；Be provided with around the metal oxide resistance vertical direction two ends extend through the bottom flange dish fixing hole and
The support bar of the fixing hole of the top flange dish；The support bar is fixed in the fixing hole by screw and sealing gasket.
Further, the whole height of the arrester is less than 11.6m.
Compared with immediate prior art, the present invention has following marked improvement：
1) technical scheme that the present invention is provided combines ultra-high voltage lightning arrester with gap triggering control technology, survey control technology,
Can depth reduction system for ultra-high voltage transmission metal oxide arrester residual voltage, improve the level of protection of arrester and reliable
Property, it is a kind of high performance overvoltage protection.
2) the clearance control type metal oxide arrester that the present invention is provided is applied to the overvoltage protection of system for ultra-high voltage transmission, its
Excellent protective value allows system reduction power equipment and transmission line insulator level, reduces Transmission Cost；It is defeated for extra-high voltage
Electric system, under the premise of maintaining existing power equipment and transmission line insulator poor, it is allowed to cancel dividing, closing for breaker
Lock resistance, economic benefit is very notable.
3) entirety of metal oxide arrester is in pyramidal structure, and its base unit section cross-sectional diameter is maximum, top unit section
Cross-sectional diameter is minimum, and the stress that each unit section bottom produces in the case where loading condition is waited is consistent；With existing arrester structure design
Compare, arrester failing load substantially increases the shock resistance of arrester up to more than 65kN.
4) front face area of metal oxide arrester is small, and the wind load of generation is small.Designed using pyramidal structure, effectively reduced
The front face area of top unit section, so as to the bend loading of wind load generation is greatly reduced, bending strength can improve more than 30%.
5) porcelain knob uses bitumen layer with the bonding site of ring flange, and the bitumen layer has the effect for being extruded buffering, in manufacturing process
In, top flange dish, bottom flange dish and porcelain knob occur different shrinkage factors, and bitumen layer can bear this extruding, so as to keep away
Exempt from the extruding disrepair phenomenon in manufacturing process, porcelain knob is glued using cement glue with ring flange, improves porcelain knob and ring flange
Mechanical coupling strength.
6) hole wall of porcelain knob mounting hole is provided with the multiple and concentric annular projection of porcelain knob mounting hole, after long-term use being avoided,
Top flange dish and bottom flange dish occur loosening phenomenon, improve the mechanical coupling strength of ring flange and porcelain knob.
7) height of porcelain knob top cement glue in the vertical direction is not less than 0.40 with the ratio of corresponding porcelain knob outer dia；
The height of porcelain knob bottom cement glue in the vertical direction is not less than 0.45 with the ratio of corresponding porcelain knob outer dia；By improving
The height of adhesive in the vertical direction, is conducive to giving full play to the stress of each unit section porcelain knob, and the entirety for improving arrester resists
Shock stability.
8) whole height of arrester is less than 11.6m, by reducing the whole height of arrester, can improve the shock resistance of arrester
Energy and anti-bending strength, but because arrester whole height is limited by exterior insulation set creep age distance, therefore exterior insulation set
Porcelain knob outside have spaced gamp and umbellule；The horizontal range that gamp stretches out is 75mm, the horizontal range that umbellule stretches out
It is 60mm, the distance between two closest gamp minimum points are 75mm；By optimization design cluster parachute, it is possible to decrease arrester
Highly.
Brief description of the drawings
The overall structure diagram of the clearance control type metal oxide arrester that Fig. 1 is provided for the present invention；
Fig. 2 is the porcelain knob structural representation of arrester in Fig. 1；
Fig. 3 is the enlarged drawing of cluster parachute in Fig. 2；
Fig. 4 is the attachment structure schematic diagram of ring flange and porcelain knob；
Fig. 5 is the structural representation of porcelain knob interior metal oxide resistor piece.
Wherein 1- gaps；2- controllers；3- porcelain knobs；4- ring flanges；5- grading rings；6- gamps；7- umbellules；8- screws；9-
Annular projection；10- cement glues；11- metal oxide resistances；12- support bars；13- presses pressing spring.
Specific embodiment
Specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.
In order to thoroughly understand the embodiment of the present invention, detailed structure will be proposed in following description.Obviously, the embodiment of the present invention
Execution be not limited to the specific details that those skilled in the art is familiar with.Presently preferred embodiments of the present invention is described in detail as follows,
But in addition to these detailed descriptions, the present invention can also have other embodiment.
The overall structure of the clearance control type metal oxide arrester that the present invention is provided is as shown in Figure 1.Arrester includes side vertically
To the unit section being sequentially connected in series, grading ring 5 is installed on top unit section；Each unit section includes outside insulating sleeve and peace
Metal oxide resistance 11 in the insulating sleeve；The base unit section two ends of the arrester are parallel with control unit,
Described control unit includes the controller 2 in gap 1 and the connection gap 1；The controller 2 detects the arrester two ends
Voltage, and according to the voltage triggered gap 1 on or off, when the gap 1 turns on, the bottom list
Unit's section is shorted.
Clearance control type metal oxide arrester be applied to it is controllable smaller, power frequency continued flow is smaller, gap 1 can self-extinguish feelings
Condition.
The control method of controller 2 is as follows：
(1) system normally run or system overvoltage amplitude not less than setting activation threshold value U0 when, all unit sections of arrester
System voltage and overvoltage are born jointly.
(2) when system overvoltage amplitude exceedes given threshold U0, the hair trigger signal of controller 2, gap 1 punctures conducting, bottom
Unit section is shorted, and system overvoltage is undertaken by other unit sections of arrester, and the residual voltage value of arrester is changed into other unit sections
Residual voltage, the residual voltage value of more conventional whole arrester is substantially reduced, so as to improve the overvoltage protection level of arrester.
U0 may be set to 1.4p.u. (for the √ 3=898kV of ultra-high voltage AC transmission system 1.0p.u.=1100* √ 2/), this be because
It is standard GB/Z 24842-2009《1000kV ultra-high voltage AC input transformation engineering overvoltage and Insulation Coordination》Regulation, extra-high voltage
The power-frequency overvoltage of AC transmission system is no more than following numerical value：The transformer substation side 1.3p.u. of line-breaker；Line broken circuit
The line side 1.4p.u. (duration is not more than 0.5s) of device.Controllable arrester is arranged on breaker line side, to ensure to keep away
The energy that thunder device absorbs is no more than its energy tolerance range, and the origination action voltage in gap 1 must avoid power frequency maximum overvoltage, i.e. U0
It is set as 1.4p.u..
In order to improve the anti-seismic performance and anti-bending strength of arrester, the arrester that the present invention is provided uses iso-stress design principle, right
The porcelain knob 3 of the unit section of each series connection is designed respectively：The cross-sectional diameter of porcelain knob 3 design of base unit section is maximum, top
The cross-sectional diameter of porcelain knob 3 design of unit section is minimum so that the entirety of arrester is in pyramidal structure, in the case where loading condition is waited each
The stress that unit section bottom produces is consistent.
Pyramidal structure design is the inevitable choice of iso-stress design principle.Arrester top quality will be produced in earthquake in its underpart
Stress, and general top quality is bigger, the earthquake stress produced in bottom is also bigger.On the other hand, arrester in operation
Bend loading mostlys come from the wind pressure acted on wind load, and upper element and can also be applied to.Pyramidal structure design refer on
The porcelain knob 3 of portion's unit section reduces the diameter of porcelain knob 3 and wall thickness as far as possible under conditions of inner space is met, so as to reduce top matter
Amount.The porcelain knob 3 of lower unit section chooses the larger diameter of porcelain knob 3 in production technology and production technology allowed band, as far as possible
And wall thickness.
As shown in Figure 2-5, the exterior insulation set includes the ring flange 4 at porcelain knob 3 and the two ends of porcelain knob 3；The porcelain knob 3 it is interior
There is cylinder type hollow part in the middle of portion, for accommodating metal oxide resistance 11, and insulating gas is contained inside it；
The insulating gas is any one in nitrogen, carbon dioxide or dry air.The outside of the porcelain knob 3 has spaced
Gamp 6 and umbellule 7；The structure design of each gamp 6 is completely the same, and the structure design of each umbellule 7 is completely the same.
The whole height for reducing arrester is conducive to improving its anti-seismic performance, is also beneficial to improve the integrally bending performance of arrester,
But arrester whole height is limited by overcoat creep age distance.The present embodiment by optimizing the cluster parachute outside porcelain knob 3, by arrester
Overall porcelain piece is highly controlled within 11.6m.Beveled structure after specific optimization is as shown in Figure 3：The level that gamp 6 stretches out away from
From being 75mm, the horizontal range that umbellule 7 stretches out is 60mm, and the distance between two closest minimum points of gamp 6 are 75mm；
Vertical spacing between top gamp 6 and the minimum point of lower section umbellule 7 is 34mm；Top umbellule 7 and the minimum point of lower section gamp 6 it
Between vertical spacing be 41mm.
The porcelain knob 3 makes of high alumina refractories；The ring flange 4 is made of cast aluminium alloy；
As shown in figure 4, the inner side of the ring flange 4 is provided with being installed with the concentric porcelain knob mounting hole of the ring flange 4, the porcelain knob
Bitumen layer is coated with the hole wall in hole, the two ends of the porcelain knob 3 are glued in porcelain knob mounting hole by cement glue 10 respectively；Institute
The glued position for stating the two ends of porcelain knob 3 is also coated with bitumen layer.Bitumen layer have be extruded cushioning effect, in manufacturing process, top
Ring flange 4, bottom flange dish 4 and porcelain knob 3 occur different shrinkage factors, and bitumen layer can bear this extruding, so as to avoid
Extruding disrepair phenomenon in manufacturing process, and cement glue 10 is used, ring flange 4 can be increased strong with the mechanical connection of porcelain knob 3
Degree.
The hole wall of the porcelain knob mounting hole is provided with multiple with the concentric annular projection 9 of the porcelain knob mounting hole, can avoid long-term
After use, the loosening phenomenon up and down that top flange dish 4 and bottom flange dish 4 occur.
The height of cement glue 10 is bigger, is more conducive to giving full play to the stress of unit section porcelain knob 3.In the present embodiment, the porcelain knob
The height of the in the vertical direction of 3 top cement glue 10 is not less than 0.40 with the ratio of the outer dia of corresponding porcelain knob 3；The porcelain knob 3
The height of the in the vertical direction of bottom cement glue 10 is not less than 0.45 with the ratio of the outer dia of corresponding porcelain knob 3.
Screw 8 is also respectively provided with the corner of the top flange dish 4 and the bottom flange dish 4, for upper and lower two unit sections
Between be connected.
The interior metal oxide resistor piece 11 of porcelain knob 3 be stack gradually cylindric resistor disc, structure in vertical direction as shown in figure 5,
The bottom flange dish 4 of the bottom of metal oxide resistance 11 and unit section is fixed using directly crimping mode, its top and unit
It is provided with compressive state by pressing spring 13 between the top flange dish 4 of section.Upper and lower resistance is caused by by pressing spring 13
Mutually press between piece, form a core body for inherently stable.
In order to further strengthen the stability of the interior metal oxide resistor piece 11 of porcelain knob 3, the bottom flange dish 4 with it is described
Fixing hole of the vertical direction through the ring flange 4 is correspondingly provided with top flange dish 4；The metal oxide resistance 11 weeks
Enclose and be provided with the two ends of vertical direction and extend through the fixing hole of the bottom flange dish 4 and the fixing hole of the top flange dish 4
Support bar 12；The support bar 12 is fixed in the fixing hole by screw and sealing gasket.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, although reference
Above-described embodiment has been described in detail to the present invention, and those of ordinary skill in the art still can be to of the invention specific
Implementation method is modified or equivalent, these without departing from any modification of spirit and scope of the invention or equivalent,
Applying within pending claims.
Claims (10)
1. a kind of clearance control type metal oxide arrester, the unit section that the arrester is sequentially connected in series including vertical direction, institute
Stating unit section includes outside insulating sleeve and the metal oxide resistance in the insulating sleeve；It is characterized in that：
The base unit section two ends of the arrester are parallel with control unit, and described control unit includes the control in gap and the connection gap
Device processed；The controller detects the voltage at the arrester two ends, and the conducting in the gap is triggered according to the magnitude of voltage for detecting,
When the gap turns on, the base unit section is shorted.
2. a kind of clearance control type metal oxide arrester according to claim 1, it is characterised in that：
When the voltage that the controller detects arrester two ends is more than or equal to 1257.2KV, between the controller triggering is described
Gap is turned on.
3. a kind of clearance control type metal oxide arrester according to claim 1, it is characterised in that：
The exterior insulation set includes the ring flange at porcelain knob and porcelain knob two ends；The entirety of the arrester is in the porcelain knob of base unit section
Cross-sectional diameter is maximum, the pyramidal structure of the porcelain knob cross-sectional diameter minimum of top unit section, each unit in the case where loading condition is waited
The stress that section bottom produces is consistent.
4. a kind of clearance control type metal oxide arrester according to claim 3, it is characterised in that：
The bosom of the porcelain knob has cylinder type hollow part, for accommodating metal oxide resistance, and is filled inside it
There is insulating gas；The insulating gas is any one in nitrogen, carbon dioxide or dry air.
5. a kind of clearance control type metal oxide arrester according to claim 4, it is characterised in that：
The outside of the porcelain knob has spaced gamp and umbellule；The horizontal range that gamp stretches out is 75mm, what umbellule stretched out
Horizontal range is 60mm, and the distance between two closest gamp minimum points are 75mm.
6. a kind of clearance control type metal oxide arrester according to claim 3, it is characterised in that：
Be provided with the inside of the ring flange with the concentric porcelain knob mounting hole of ring flange, be coated with the hole wall of the porcelain knob mounting hole
Bitumen layer, the two ends of the porcelain knob are glued in porcelain knob mounting hole by cement glue respectively；The glued portion at the porcelain knob two ends
Position is also coated with bitumen layer；The hole wall of the porcelain knob mounting hole is provided with multiple with the concentric annular projection of porcelain knob mounting hole.
7. a kind of clearance control type metal oxide arrester according to claim 6, it is characterised in that：
The height of porcelain knob top cement glue in the vertical direction is equal to or more than with corresponding porcelain knob outer dia ratio
0.40；The height of the porcelain knob bottom cement glue in the vertical direction is equal to or more than with the ratio of corresponding porcelain knob outer dia
0.45。
8. a kind of clearance control type metal oxide arrester according to claim 1, it is characterised in that：
The bottom flange dish of the bottom of the metal oxide resistance and unit section is fixed using directly crimping mode, its top with
It is provided with compressive state by pressing spring between the top flange dish of unit section.
9. a kind of clearance control type metal oxide arrester according to claim 8, it is characterised in that：
Fixing hole of the vertical direction through the ring flange is correspondingly provided with the bottom flange dish and the top flange dish；It is described
The two ends that vertical direction is provided with around metal oxide resistance extend through the fixing hole of the bottom flange dish and the top
The support bar of the fixing hole of ring flange；The support bar is fixed in the fixing hole by screw and sealing gasket.
10. the clearance control type metal oxide arrester according to any one in claim 1-9, it is characterised in that：
The whole height of the arrester is less than 11.6m.
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| CN201511001303.6A CN106920607A (en) | 2015-12-28 | 2015-12-28 | A kind of clearance control type metal oxide arrester |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879338A (en) * | 2018-08-02 | 2018-11-23 | 河北冀高电力器材开发有限公司 | Tempered glass arrester |
| CN109448945A (en) * | 2018-12-11 | 2019-03-08 | 金冠电气股份有限公司 | A kind of 750kV high anti-seismic AC system arrester |
| CN112736647A (en) * | 2020-12-24 | 2021-04-30 | 中国电力科学研究院有限公司 | Clearance forced trigger device and alternating current controllable lightning arrester |
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| CN108879338A (en) * | 2018-08-02 | 2018-11-23 | 河北冀高电力器材开发有限公司 | Tempered glass arrester |
| CN108879338B (en) * | 2018-08-02 | 2023-08-15 | 河北冀高电力器材开发有限公司 | Toughened glass lightning arrester |
| CN109448945A (en) * | 2018-12-11 | 2019-03-08 | 金冠电气股份有限公司 | A kind of 750kV high anti-seismic AC system arrester |
| CN112736647A (en) * | 2020-12-24 | 2021-04-30 | 中国电力科学研究院有限公司 | Clearance forced trigger device and alternating current controllable lightning arrester |
| CN112736647B (en) * | 2020-12-24 | 2023-02-28 | 中国电力科学研究院有限公司 | Clearance forced trigger device and alternating current controllable lightning arrester |
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Application publication date: 20170704 |