CN205941767U - High voltage arrester upper segment LEAKAGE CURRENT TEST device - Google Patents
High voltage arrester upper segment LEAKAGE CURRENT TEST device Download PDFInfo
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- CN205941767U CN205941767U CN201620933705.3U CN201620933705U CN205941767U CN 205941767 U CN205941767 U CN 205941767U CN 201620933705 U CN201620933705 U CN 201620933705U CN 205941767 U CN205941767 U CN 205941767U
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Abstract
The utility model discloses a high voltage arrester upper segment LEAKAGE CURRENT TEST device, including umbrella and the LEAKAGE CURRENT TEST subassembly of damming, dam the umbrella with LEAKAGE CURRENT TEST subassembly electric connection, the umbrella that dams can be dismantled with high voltage arrester and be connected, the umbrella that dams is located high voltage arrester apart from the nearest well section flange of upper segment with between high voltage arrester's the equalizer ring, the umbrella that dams is located high voltage arrester's insulation is sheathe in. When using high voltage arrester upper segment LEAKAGE CURRENT TEST device, the umbrella that will dam is installed in the insulation of high voltage arrester upper segment and is sheathe in, the electric current that stray capacitance formed that the measurable quantity dams and is aroused by the equalizer ring on the umbrella, and its numerical value is equal to the interference current in the arrester, subtracts when handling measured data afterwards the numerical value of electric current just can obtain more accurate leakage current's data, and the umbrella that dams simultaneously can be dismantled with high voltage arrester and be connected, and convenient to use has reduced surveying work's work load.
Description
Technical field
The utility model is related to current testing device, saves testing device for current leakage more particularly on high-voltage arrester.
Background technology
High-voltage arrester is connected between cable and the earth, generally in parallel with by protection equipment.The core of high-voltage arrester
Part is piezo-resistance, and piezo-resistance has non-linear volt-ampere curve characteristic, under normal working voltage, the resistance of piezo-resistance
Very big, by the only hundreds of microampere of the electric current of piezo-resistance, and when excessive voltage invades, piezo-resistance near short circuit, made
Voltage runs through ground wire and imports the earth, limits the spoke value of system voltage simultaneously, and subsequent piezo-resistance recovers high resistant again quickly
State, thereby protects equipment not breakdown.Because high-voltage arrester has stray capacitance over the ground so that voltage along high-voltage arrester
Skewness, easily in the local generation partial breakdown that voltage is high, causes damage to high-voltage arrester.Therefore increase a high pressure
Arrester grading ring can make the voltage's distribiuting along high-voltage arrester uniform, will not puncture.
The insulating properties of high-voltage arrester is the key factor that working voltage judges high-voltage arrester quality.And high voltage lightning-protection
The insulating properties of device determines mainly by the numerical value of testing high voltage leakage current of an arrester, high-voltage arrester generally in upper section equipped with all pressing
Ring, but due to close together, can there is stray capacitance in grading ring and internode on high-voltage arrester, in economize on electricity road on arrester
Form interference electric current, the interference electric current that during experiment, grading ring causes is measured together with upper section Leakage Current, causes in-site measurement
When on current bigger than normal it is difficult to the insulating properties of accurate response high-voltage arrester, existing can avoid mainly arranging of grading ring interference
Shi You：Dismantle grading ring when the 1st, testing, the method workload is big, needs special equipment and has certain danger；2nd, shield, high
Pressure shield effectiveness is bad, and low pressure shielding cannot be realized；3rd, artificial estimation, the environment residing for high-voltage arrester is different, estimation error
Greatly.
Content of the invention
Based on this, the utility model is to overcome the deficiencies in the prior art, provides a kind of easy to operate and measures accurately high
Testing device for current leakage is saved on pressure arrester.
Its technical scheme is as follows：
Testing device for current leakage is saved on a kind of high-voltage arrester, including umbrella and the leakage current testing assembly of damming, described
The umbrella that dams is electrically connected with described leakage current testing assembly, and the described umbrella that dams is detachably connected with high-voltage arrester, described section
Stream umbrella saves between nearest middle section flange and the grading ring of described high-voltage arrester located at described high-voltage arrester away from upper, described section
Stream umbrella is on the insulation sleeve of described high-voltage arrester.
Below a kind of technical scheme is further described：
Wherein in an embodiment, the described pack that dams includes inner ring, outer shroud and rod member, and described inner ring is equal with described outer shroud
Be placed on outside described high-voltage arrester, described inner ring internal diameter be less than described outer shroud, described interior be located on described insulation sleeve, described interior
Ring is connected by described rod member with described outer shroud, is also associated with metal wire between described inner ring and described outer shroud.
Wherein in an embodiment, described outer shroud is provided with the first fracture and the second fracture, and described outer shroud is described
One fracture is disconnected with described second incision position, and described first fracture two ends are hinged, and described second fracture two ends can by fixture
Dismounting connect, described inner ring with described first fracture, described second fracture corresponding position be provided with the 3rd fracture with the 4th break
Mouthful.
Wherein in an embodiment, described outer be located on described grading ring and the described middle section flange nearest away from upper section it
Between, described bore diameter of outer ring is not less than the internal diameter of described grading ring.
Wherein in an embodiment, described inner ring, outer shroud and rod member are conductive material.
Wherein in an embodiment, on the described umbrella that dams, arbitrary position saves the exhausted of nearest middle section flange with described away from upper
Edge creep age distance is all higher than 80cm.
Wherein in an embodiment, it is micro- that described leakage current testing assembly includes high voltage direct current generator, the first high pressure
Peace table, the second high voltage microammeter and the 3rd high voltage microammeter, described high voltage direct current generator and described first high voltage microammeter
Negative pole interface is electrically connected with, and the anode interface of described first high voltage microammeter is electrically connected with the described middle section flange nearest away from upper section
Connect, the negative pole interface of described 3rd high voltage microammeter is electrically connected with the lower section flange of high-voltage arrester, and described 3rd high pressure is micro-
The anode interface ground connection of peace table, the negative pole interface of described second high voltage microammeter be connected to described in dam umbrella, described second high pressure
The anode interface ground connection of microampere meter, described grading ring ground connection.
The utility model has the advantages that：
During using saving testing device for current leakage on high-voltage arrester, the umbrella that dams is installed on the insulation sleeve of section on arrester
On, the electric current being formed by the stray capacitance that grading ring causes is measured on the umbrella that dams, this electric current is numerically equal to arrester
The interference electric current that upper section internal cause stray capacitance is formed, deducts the numerical value of electric current, just can obtain when subsequently experimental data being processed
To the data of more accurate leakage current, the umbrella that simultaneously dams is detachably connected with arrester, easy to use, decreases measurement work
The workload made.
Brief description
Fig. 1 is to save Leakage Current test device installation diagram on high-voltage arrester；
Fig. 2 is the umbrella structural representation that dams；
Fig. 3 is umbrella side structure schematic diagram of damming；
Fig. 4 is the first fracture generalized section；
Fig. 5 is the second fracture partial cutaway schematic.
Description of reference numerals：
100th, dam umbrella, and 110, inner ring, 120, outer shroud, 130, rod member, 140, metal wire, 150, fixture, 200, leakage
Testing current assembly, 210, high voltage direct current generator, the 220, first high voltage microammeter, the 230, second high voltage microammeter, 240,
Three high voltage microammeters, 300, grading ring, 400, high-voltage arrester.
Specific embodiment
Connection with figures is described in detail to embodiment of the present utility model below.
The present embodiment is using 500kV arrester as test object, but saves testing device for current leakage on high-voltage arrester
It is equally applicable to other high-voltage arresters.
As shown in figure 1, section testing device for current leakage includes dam umbrella 100 and leakage current testing on 500kV arrester
Assembly 200, the umbrella 100 that dams is electrically connected with leakage current testing assembly 200, and the umbrella 100 that dams is removable with 500kV arrester 400
Unload connection, all pressures located at 500kV arrester 400 away from the nearest middle section flange of upper section and 500kV arrester 400 for the umbrella 100 of damming
Between ring 300, dam umbrella 100 on the insulation sleeve of 500kV arrester 400.Grading ring 300 can average 500kV arrester
400 surrounding voltages, protect 500kV arrester 400 not breakdown, but save it on grading ring 300 and 500kV arrester 400 simultaneously
Between can form stray capacitance, stray capacitance save on 500kV arrester 400 in formed interference electric current, in impact save leakage current
The result of experiment, misleads the judgement for 500kV arrester 400 state, and the umbrella 100 that dams is by forming electricity with grading ring 300
Hold structure, the current values equally being formed by stray capacitance can be measured on the umbrella 100 that dams, this electric current numerically with interference electric current
Equal, so the interference of the interference electric current being caused by grading ring 300 can be rejected in follow-up Measurement and Data Processing.
As shown in Fig. 2 the umbrella 100 that dams includes inner ring 110, outer shroud 120 and rod member 130, inner ring 110 is all covered with outer shroud 120
Outside 500kV arrester 400, inner ring 110 internal diameter is less than described outer shroud 130, and, on insulation sleeve, inner ring 110 is with outward for inner ring 110
Ring 120 is connected by rod member, is also associated with metal wire 140 between inner ring 110 and outer shroud 120, and metal wire 140 act as water conservancy diversion,
The voltage everywhere on umbrella 100 that makes to dam is consistent.
As shown in figure 3, outer shroud 120 is provided with the first fracture and the second fracture, outer shroud 120 is in the first fracture and the second fracture
Place disconnects, as shown in figure 4, the first fracture two ends are hinged, as shown in figure 5, the second fracture two ends are detachably connected by fixture 150
Connect, inner ring 110 is being provided with the 3rd fracture and the 4th fracture with the first fracture, the second fracture corresponding position.The test preparatory stage,
The fixture 150 of the second fracture is pulled down, opens the umbrella 100 that dams, two parts of inner ring 110 are connected to 500kV respectively and take shelter from the thunder
In the groove of device 400 insulation sleeve, then close up two parts of the umbrella 100 that dams, fix the two ends of the second fracture using fixture 150.
As shown in figure 1, outer shroud 120 is located at grading ring 300 and between the nearest middle section flange of upper section, outer shroud 120 internal diameter
Not less than the internal diameter of grading ring 300, with the measured current values being caused by stray capacitance on this umbrella 100 that ensures to dam with
The internal interference electric current numerical value being caused by stray capacitance is saved on 500kV arrester 400 close.
Because the umbrella 100 that dams passes through to sense stray capacitance generation electric current, so inner ring 110, outer shroud 120 are equal with rod member 130
For conductive material.
When carrying out leakage current testing, high voltage direct current generator 210 stresses on the middle section method nearest away from upper section by wire
Lan Shang, therefore for prevent from damming umbrella 100 and between the nearest middle section flange of upper section because there is electrion in too high pressure reduction,
Arbitrary position and the creepage distance of insulation of the middle section flange nearest away from upper section on umbrella 100 of damming is all higher than 80cm.
Because this experiment uses negative polarity d. c electricity, therefore as shown in figure 1, high voltage direct current generator 210 and first
The negative pole interface of high voltage microammeter 220 is connected by wire, the anode interface of the first high voltage microammeter 220 pass through wire located at away from
Nearest middle section flange, the negative pole interface of the 3rd high voltage microammeter 240 and 500kV arrester 400 are saved on high-voltage arrester 400
Lower section flange connect, the anode interface of the 3rd high voltage microammeter 240 passes through wired earth, the second high voltage microammeter 230 negative
Pole interface is connected to the umbrella 100 that dams, and the anode interface of the second high voltage microammeter 230 passes through wired earth, and described grading ring 300 leads to
Cross wired earth.What the first high voltage microammeter 220 measured is total current I by circuit1, the second high voltage microammeter 230 measures
Be the electric current I being caused by stray capacitance2, I2Value be equal to the stray capacitance shape that caused by grading ring 300 in section arrester
The interference electric current becoming, the 3rd high voltage microammeter 240 measurement is to save the electric current I passing through down in 500kV arrester 4003, now lead to
The electric current crossing section on 500kV arrester 400 is I=I1-I2-I3.
, right first with high voltage direct current generator 210 taking the leakage current testing under 0.75 times of DC reference voltage as a example
Circuit persistent pressure, when the reading of the first high voltage microammeter 220 reaches 1mA, record voltage U now1mA, subsequently it is depressured simultaneously
Calculate 0.75U1mAValue, reuse high voltage direct current generator 210 and be forced into 0.75U1mA, record now each high voltage microammeter
Reading, and utilize above-mentioned computing formula I=I1-I2-I3Draw on 500kV arrester 400 leakage current of section, by with standard
Comparing is understanding the insulation situation of 500kV arrester 400.
Each technical characteristic of embodiment described above can arbitrarily be combined, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic applied in example is all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope of this specification record.
Embodiment described above only have expressed several embodiments of the present utility model, and its description is more concrete and detailed,
But therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, some deformation can also be made and improve, these broadly fall into
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be defined by claims.
Claims (7)
1. on a kind of high-voltage arrester section testing device for current leakage it is characterised in that including damming umbrella and leakage current testing
Assembly, the described umbrella that dams is electrically connected with described leakage current testing assembly, and the described umbrella that dams detachably is connected with high-voltage arrester
Connect, described dam umbrella located at the grading ring away from the nearest middle section flange of upper section and described high-voltage arrester for the described high-voltage arrester it
Between, the described umbrella that dams is on the insulation sleeve of described high-voltage arrester.
2. on high-voltage arrester according to claim 1 section testing device for current leakage it is characterised in that the described umbrella that dams
Including inner ring, outer shroud and rod member, described inner ring and described outer shroud are all placed on outside described high-voltage arrester, and described inner ring internal diameter is less than
Described outer shroud, described interior be located on described insulation sleeve, described inner ring is connected by described rod member with described outer shroud, described inner ring
It is also associated with metal wire and described outer shroud between.
3. on high-voltage arrester according to claim 2 section testing device for current leakage it is characterised in that on described outer shroud
It is provided with the first fracture and the second fracture, described outer shroud is disconnected with described second incision position in described first fracture, described first breaks
Mouthful two ends are hinged, and described second fracture two ends are detachably connected by fixture, described inner ring with described first fracture, described
Second fracture corresponding position is provided with the 3rd fracture and the 4th fracture.
4. testing device for current leakage is saved on high-voltage arrester according to claim 2 it is characterised in that described outer shroud sets
Between described grading ring and the described middle section flange nearest away from upper section, described bore diameter of outer ring is not less than the interior of described grading ring
Footpath.
5. on high-voltage arrester according to claim 2 section testing device for current leakage it is characterised in that described inner ring,
Outer shroud and rod member are conductive material.
6. on high-voltage arrester according to claim 2 section testing device for current leakage it is characterised in that the described umbrella that dams
Upper arbitrary position is all higher than 80cm with the creepage distance of insulation of the described middle section flange nearest away from upper section.
7. on the high-voltage arrester according to any one of claim 1-6 section testing device for current leakage it is characterised in that institute
State leakage current testing assembly and include high voltage direct current generator, the first high voltage microammeter, the second high voltage microammeter and the 3rd high pressure
Microampere meter, described high voltage direct current generator is electrically connected with the negative pole interface of described first high voltage microammeter, described first high pressure
The anode interface of microampere meter is electrically connected with the described middle section flange nearest away from upper section, and the negative pole of described second high voltage microammeter connects
Mouth dams umbrella described in being connected to, the anode interface ground connection of described second high voltage microammeter, the negative pole of described 3rd high voltage microammeter
The lower section flange of interface and high-voltage arrester is electrically connected with, the anode interface ground connection of described 3rd high voltage microammeter, described all presses
Ring is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620933705.3U CN205941767U (en) | 2016-08-24 | 2016-08-24 | High voltage arrester upper segment LEAKAGE CURRENT TEST device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620933705.3U CN205941767U (en) | 2016-08-24 | 2016-08-24 | High voltage arrester upper segment LEAKAGE CURRENT TEST device |
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| Publication Number | Publication Date |
|---|---|
| CN205941767U true CN205941767U (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620933705.3U Active CN205941767U (en) | 2016-08-24 | 2016-08-24 | High voltage arrester upper segment LEAKAGE CURRENT TEST device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249098A (en) * | 2016-08-24 | 2016-12-21 | 广东电网有限责任公司惠州供电局 | Testing device for current leakage and method of testing is saved on high-voltage arrester |
-
2016
- 2016-08-24 CN CN201620933705.3U patent/CN205941767U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249098A (en) * | 2016-08-24 | 2016-12-21 | 广东电网有限责任公司惠州供电局 | Testing device for current leakage and method of testing is saved on high-voltage arrester |
| CN106249098B (en) * | 2016-08-24 | 2023-08-22 | 广东电网有限责任公司惠州供电局 | Device and method for testing upper section leakage current of high-voltage lightning arrester |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |