CN110736881A - Special capacitor current test operating rod - Google Patents
Special capacitor current test operating rod Download PDFInfo
- Publication number
- CN110736881A CN110736881A CN201911041103.1A CN201911041103A CN110736881A CN 110736881 A CN110736881 A CN 110736881A CN 201911041103 A CN201911041103 A CN 201911041103A CN 110736881 A CN110736881 A CN 110736881A
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- China
- Prior art keywords
- head
- rod body
- rod
- internal thread
- operating rod
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- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
Abstract
The invention belongs to the field of high-voltage live test, and particularly relates to an operating rod for measuring capacitance current, in particular to a special capacitance current test operating rod which comprises an operating rod body, an operating rod head and an insulating rod, wherein a current-limiting fuse is arranged in the operating rod and is pressed by a spring, the fuse can be prevented from falling off, the fuse is pressed by the spring and does not need to be disassembled after being installed, the fuse is convenient to use next time, and the time for assembling and disassembling the fuse each time is saved.
Description
Technical Field
The invention belongs to the field of high-voltage live test, and particularly relates to an operating rod for measuring capacitance current, in particular to a special capacitance current test operating rod.
Background
System capacitance current: it means that when a neutral point ungrounded system in operation generates single-phase grounding without compensation, a reactive current flows through the grounding point. Due to the existence of capacitance current, grounding electric arcs can be formed at the moment of single-phase grounding, are not easy to extinguish, and can be elongated under the action of wind power, electrodynamic force, hot gas and the like, so that line tripping accidents are caused by interphase short circuit; the earth arc may also produce intermittent arc over-voltages, saturating the core of the electromagnetic voltage transformer, causing resonant over-voltages, etc. Causing fuse wire fusing, lightning arrester and voltage transformer damage. Since the system capacitance current has an important influence on the safe operation of the power grid, it is necessary to measure the magnitude of the system capacitance current. So as to take corresponding measures, such as adding an arc suppression coil to compensate the capacitance current.
The latest method for measuring the capacitance current adopted by at present is a standard signal injection and amplitude comparison method, the field test chart is shown in figure 1, but the problems are found in field practical use that 1, no special operating rod is provided and the common insulating rod 4 of a transformer substation is used for replacing, 2, an upper fuse clamp and a lower fuse clamp 3 are adopted for clamping a current limiting fuse 2, the current limiting fuse is easy to loosen during use and is easy to fall off and damage the fuse when the current limiting fuse is serious, 3, a high-voltage test lead 5 is externally arranged, because an operating rod hanging rod is required to be used for testing at a 35kV neutral point and a 10kV capacitor bank neutral point of a main transformer, a 35kV neutral point sleeve of the 110kV main transformer is very close to a 35kVA or C phase sleeve, when a 10kV distributed capacitor bank neutral point aluminum bar is vertically arranged, the distance between the 10kV distributed capacitor bank neutral point aluminum bar and other charged phase aluminum bars is very close, the swinging of the lead when the high-voltage test lead 5 is externally arranged in the test has the test, the safety, the risk of short circuit or the discharge of the test lead to damage a test instrument can be caused, even the safety of a human body, the main transformer or the contact of the main transformer.
Disclosure of Invention
Aiming at the problems that a current limiting fuse is easy to fall off and break, a lead wire swings to cause short circuit and damage a test instrument due to the fact that a special operating rod is not arranged during measurement of capacitance current, the invention provides the special capacitance current test operating rod, and the operating rod can replace a surface cleaning head and a built-in part of high-voltage test lead wire and is internally provided with the current limiting fuse.
The invention is realized by adopting the following technical scheme that the special capacitance current test operating rod comprises an operating rod body, an operating rod head and an insulating rod, wherein the operating rod body comprises an upper rod body, a lower rod body and a middle metal joint, the upper rod body comprises an upper rod head with an external thread, an upper insulating part and an internal thread metal head of the upper rod body, the upper rod body is sequentially connected from top to bottom to form an upper rod body with a middle through, the lower rod body comprises a lower rod head with an external thread, a lower insulating part and a lower rod head with an internal thread, the lower rod body is sequentially connected from top to bottom to form a lower rod body with a middle through, the internal thread metal head of the lower rod body is welded inside a screw side of the lower rod body, the external part of the lower rod body is also welded with the screw, the upper part of the middle metal joint is provided with an external thread, the lower part of the middle rod body is welded with an internal thread, a baffle with a middle internal thread, the baffle with a metal baffle plate is installed on the upper part of the baffle, the upper part of the fuse is connected with the upper rod body, the lower rod body of the operating rod body, the lower rod body is connected with the upper rod body through the internal thread of the operating rod body, the upper rod body, the lower rod body is connected with the upper rod head of the operating rod body, the lower rod body, the lower rod body, the upper rod body, the lower rod body is connected with the upper rod body through the upper rod body, the upper rod body, the upper rod body, the lower end of the upper rod body, the operating rod body is connected with the upper rod.
The high-voltage test lead wire is internally provided with a current-limiting fuse, is in a spring compression type, can prevent the fuse from falling off, is compressed by a spring, does not need to be disassembled after being installed, is convenient for next use, and can save time for assembling and disassembling the fuse each time.
, arranging a cross bar welded to on the upper vertical rod, wherein the upper vertical rod and the cross bar are provided with external threads at the head part, and the upper vertical rod and the cross bar can be respectively connected with a cleaning head.
And , pressing the screw rod welded inside the lower section of the metal head with the inner thread through the nut to be connected with the built-in high-voltage test lead wire, and pressing the screw rod welded outside through the butterfly wire clamp to be connected with the external high-voltage test lead wire.
, the shovel head comprises a cover with internal thread, a shovel is arranged above the cover with internal thread, and the shovel head can clean the surface of the rusty and dirty objects.
, the utility model also comprises a cross cutter head which comprises a cover with internal screw thread, and a cross cutter is arranged above the cover with internal screw thread.
And , when the test point has insulation package and it is difficult to find the proper test point, the insulation package can be removed by rotating the tip of the cross cutter clockwise on the surface of the insulation package.
, it also includes a conical head, the conical head includes a cover with internal screw thread, an awl is set on the cover with internal screw thread, the conical head can pierce the oxide layer to make the contact good.
, the combined file comprises a file head, wherein a file on the upper portion of the file head is welded with a -th connecting plate, a bolt hole is formed in the lower portion of a -th connecting plate, a -th connecting plate fixing rod is welded in the middle of the -th connecting plate, an internally threaded pipe is arranged on the lower portion of the file head, a circular second connecting plate is welded on the internally threaded pipe, a plurality of connecting plate fixing holes are formed in the edge of the second connecting plate in the circumferential direction, the middle of the file head is connected with a -th connecting plate through a file head bolt, a spring is arranged between the end of the file head bolt and the second connecting plate, and a -th connecting plate fixing rod is inserted into the connecting plate fixing holes.
, the metal plate is copper plate.
The special capacitance current test operating rod designed by the invention has the following advantages:
1. during testing, only threaded connection is needed to test, and the time of assembling connection and binding in the prior art is saved.
2. The current-limiting fuse is built-in, adopts the spring compression mode, and the fuse is built-in can prevent that the fuse from droing, and the fuse adopts the spring to compress tightly, need not dismantle after the installation, and convenient next use can save and install the fuse time at every turn.
3. The high-voltage test lead is internally provided, the danger that the lead swings and mistakenly touches the electrified part exists in the prior art, the lead and the insulating rod can only be tied to by using an insulating rope, the high-voltage test lead is not standardized and is not safe, only the length of a special capacitance current test operating rod is reasonably designed, and parts of test leads are internally provided, so that the high-voltage test lead can be basically positioned below the upper cover of an oil tank when the capacitance current is tested at the neutral point of a transformer, and the high-voltage test lead can be basically positioned outside a fence of the capacitor bank when the capacitance current is tested at the neutral point of the combined capacitor bank, and the potential safety hazard caused by the.
4. The replaceable surface cleaning head comprises a shovel head, a cross head, a cone head and a file head which are designed according to the situation of field equipment, wherein the shovel head can be used for primarily cleaning surfaces of rust, dirt and the like, (2) the cross head is used for enabling a test point to be provided with an insulating envelope, when the test point is difficult to find out a proper test point, the tip of the cross head can be used for clockwise rotating the insulating envelope on the surface of the insulating envelope to remove the insulating envelope, (3) the cone head can be used for penetrating an oxide layer to enable good contact, (4) the file head can be used for filing the rust, the oxide layer and the like to clean the surfaces, and or more of the four surface cleaning heads can be used in a matched mode according to needs to enable the contact to be good and guarantee smooth performance of test work.
Drawings
FIG. 1 is a wiring diagram of a capacitance current tester.
Fig. 2 is an exploded and assembled view of the special capacitance current test operating rod body.
Fig. 3 is a schematic structural diagram of a head of a dedicated capacitive current test operating rod.
Fig. 4 is a schematic view of an alternative surface cleaning cone head configuration.
Fig. 5 is a schematic view of an alternative surface cleaning rasp head configuration, in which 5-2 is an isometric view.
FIG. 6 is a schematic view of an alternative face cleaning Phillips head configuration.
Fig. 7 is a schematic view of an alternative surface cleaning blade configuration.
Fig. 8 is a schematic view of a dedicated capacitance current test joystick body.
Fig. 9 is a cross-sectional view of fig. 8.
FIG. 10 is a schematic view of a dedicated capacitive current test joystick with an alternative surface cleaning head.
FIG. 11 is a view of the threaded connection of the shaft of the special capacitive current test operating rod with the replaceable surface cleaning head and the insulating rod.
FIG. 12 is a diagram of the connection between the special capacitive current test operating lever and the capacitive current test instrument.
FIG. 13 is a graph of capacitance current testing.
FIG. 14 is a graph of capacitance current testing after binding of high voltage test leads.
Fig. 15 is a dedicated capacitive current test joystick test pattern.
FIG. 16 is a diagram of the original measurement of the capacitance and current.
Fig. 17 is a dedicated capacitive current test joystick test pattern employed.
In the figure, 1-wire clamp, 2-current limiting fuse, 3-fuse clamp, 4-insulating rod, 5-high voltage test lead, 6-high voltage auxiliary case, 7-test main machine, 8-grounding wire and wire clamp, 9-upper section with external thread metal head, 10-upper section insulating part, 11-upper section with internal thread metal head, 12-middle metal joint, 13-lower section with external thread metal head, 14-lower section insulating part, 15-lower section with internal thread metal head, 16-cross rod, 17-upper vertical rod, 18-internal thread cover, 19-awl, 20-external thread, 21-file, 22- -link plate, 23-file head bolt, 24-second link plate, 25-link plate fixing hole, 26-link plate fixing rod, 27-spring, 28-cross knife tip, 29-cross knife, 30-shovel, 31-metal plate, 32-pressing spring, 33-baffle plate, 34-internal high voltage test lead, 35-wire clamp, 36-current limiting fuse, 37-external thread transformer head, 37-external thread transformer, 38-capacitor group, 43-neutral point A and neutral point transformer group, 43-neutral point insulation joint A.
Detailed Description
As shown in figure 2, the operating rod body comprises an upper rod body, a lower rod body and an intermediate metal joint, wherein the upper rod body comprises an upper rod head 9 with an external thread, an upper insulation part 10 and an upper rod head 11 with an internal thread, the lower rod body comprises a lower rod head 13 with an external thread, a lower insulation part 14 and a lower rod head 15 with an internal thread, a screw rod is welded inside the internal thread on the side of the lower rod head 15 with the internal thread, a built-in high-voltage test lead 34 can be crimped through a nut, the screw rod is welded outside, the high-voltage test lead 5 can be crimped through a butterfly wire clamp 35, the intermediate metal joint 12 is provided with an external thread on the upper part and an internal thread on the lower part, a circular baffle 33 with a hole in the middle is welded inside, a compression spring 32 is installed on the upper part of the circular baffle 33, the upper part of the compression spring 32 is crimped to a copper plate, the built-in high-voltage test lead 5 is welded on the middle position.
As shown in figure 2, the lower part of the head of the operating rod is provided with an internal thread cover 18, an upper vertical rod 17 and a cross rod 16 welded with the upper vertical rod are arranged above the internal thread cover 18, and the head parts of the operating rod are provided with external threads.
As shown in FIG. 9, the current-limiting fuse 2 is built in such a manner that its lower portion is pressed against a copper plate and its upper portion is pressed by a cap with internal thread at the head of the operating lever, the current-limiting fuse is housed inside the operating lever and pressed by a pressing spring 32, and a high-voltage test lead is built in such a manner that parts of the high-voltage test lead are built in the lower shaft of the operating lever portion.
Fig. 4-7 show alternative surface cleaning heads: for polishing rust and oxide layers at joints of test parts, four cleaning heads of a conical head, a file head, a cross-shaped tool bit and a shovel head are designed. The lower parts of the cleaning heads are provided with internal thread covers, the cleaning heads can be flexibly connected with the external threads of the vertical rod 17 or the cross rod 16 on the upper part of the head of the operating rod according to the required polishing positions, and as shown in figure 10, the head of the operating rod is respectively welded with four cleaning heads.
Tapering: the front tip is round.
The upper part of the file is vertically welded with a file 21 and a th yoke plate 22, the lower part of a th yoke plate 22 is provided with a bolt hole, the middle part of the lower part is welded with a th yoke plate fixing rod 26, the lower part is provided with an internal thread cover 18, the lower part is welded with a second yoke plate 24, the second yoke plate 24 is provided with a plurality of yoke plate fixing holes 25 along the circumferential direction, the middle part is connected with the th yoke plate 22 through a file head bolt 23, and a spring 27 is arranged between the end part of the file head bolt and the second yoke plate 24.
A cross knife: the four corners and the middle crossing part of the knife are provided with sharp points.
Shoveling: shoveled at the front and rounded at the back.
The capacitance current tester who uses now does not have dedicated action bars, and uses the insulator spindle that the transformer substation was used commonly, and two upper and lower clips of current limiting fuse adoption press from both sides tightly, appear becoming flexible easily during the use, still drop easily when serious, break the fuse, and the high-voltage testing pin connection is in lower part clip department, and is very close to electrified position during the test, probably takes place the danger with electrified position short circuit when the swing of high-voltage testing pin. The problem can be solved only by adopting temporary measures of binding with the insulating rope belt on site, and the method is neither standard nor safe. In addition, the joint at the test part is exposed outside, so that the joint is easy to corrode and oxidize, has poor contact, influences the test and can only be scraped back and forth by the metal head of the insulating rod. Time and labor are wasted, and the effect is not ideal.
As shown in fig. 13-15, the capacitor current is tested at the neutral point of the combined capacitor bank. Fig. 12 is an original capacitance current test chart with the risk of the high voltage test lead 5 swinging to touch the charged capacitor bank a phase line 39; the current limiting fuse 2 has a falling risk; FIG. 13 is a test chart of temporary measures usually taken by binding the insulating rope belt 41 on site, and the temporary measures usually taken by binding the insulating rope belt 41 on site are not standard and safe; fig. 14 shows a test method of a special capacitive current test operating rod by design, the high-voltage test lead 5 can be basically arranged outside the fence 40, the danger of mistakenly touching the electrified part is avoided, and the current-limiting fuse is arranged in the current-limiting fuse.
As shown in fig. 16-17, the capacitance-current plots were tested at the transformer neutral point. Fig. 16 is an original capacitance current test diagram, the high-voltage test lead 5 has the danger of swinging to touch the transformer A phase connector 43 with the transformer electrified, fig. 16 is a test diagram of a special capacitance current test operating rod which is designed, and the danger that the high-voltage test lead swings to possibly touch the electrified part by mistake is avoided by the high-voltage test lead below the upper cover of the basic transformer oil tank.
Claims (9)
1. The special capacitance current test operating rod is characterized by comprising an operating rod body, an operating rod head and an insulating rod (4), wherein the operating rod body comprises an upper rod body, a lower rod body and a middle metal joint (12), the upper rod body comprises an upper rod body with an external thread metal head (9), an upper insulating part (10) and an internal thread metal head (11) of the upper rod body, the upper rod body is provided with an external thread metal head (9), an upper insulating part (10) and the internal thread metal head (11) of the upper rod body, which are connected in sequence from top to bottom to form a through upper part, the lower rod body comprises a lower rod body with an external thread metal head (13), a lower insulating part (14) and an internal thread metal head (15), the lower rod body is provided with an external thread metal head (13), the lower insulating part (14) and the internal thread metal head (15), the lower rod body is provided with an internal thread metal head (15) which is connected in sequence from top to bottom to form a through lower rod body, which is a through middle rod body, a lower rod body is provided with an internal thread metal head (32), a lower rod body (32) and a lower rod body (32) which is connected with an internal thread metal head, a current limiting baffle plate, a lower spring is arranged below the upper rod body, a lower spring.
2. The special capacitor current test operating rod as claimed in claim 1, wherein the upper vertical rod is provided with a cross rod (16) welded at , and the heads of the upper vertical rod and the cross rod (16) are externally threaded.
3. The special capacitor current test operating rod as claimed in claim 2, wherein the screw rod welded inside the lower section of the internally threaded metal head (15) is crimped with the internally installed high-voltage test lead (34) through a nut, and the screw rod welded outside is crimped with the externally installed high-voltage test lead (5) through a butterfly clamp (35).
4. The special capacitive current testing operating rod according to claim 2 or 3, further comprising a shovel head, wherein the shovel head comprises an internal thread cover (18), and a shovel (30) is arranged above the internal thread cover (18).
5. The special capacitive current test operating rod according to claim 3, further comprising a cross head, wherein the cross head comprises an internal thread cover (18), and a cross knife (29) is arranged above the internal thread cover (18).
6. The special capacitive current test operating rod according to claim 5, wherein the cross-shaped knife (29) has cross-shaped knife tips (28) at the intersection of the four corners and the middle.
7. The special capacitive current test operating rod according to claim 2 or 3, further comprising a conical head, wherein the conical head comprises an internal thread cover (18), and an awl (19) is arranged above the internal thread cover (18).
8. The special capacitor current test operating rod as claimed in claim 2 or 3, further comprising a rasp head, wherein the upper part of the rasp head is welded with the th yoke plate (22), the lower part of the th yoke plate (22) is provided with a bolt hole, the middle part of the th yoke plate is welded with the th yoke plate fixing rod (26), the lower part of the rasp head is provided with an internally threaded pipe (18), the second yoke plate (24) is welded with a circular shape, the edge of the second yoke plate (24) is provided with a plurality of yoke plate fixing holes (25) along the circumferential direction, the middle part of the rasp head is connected with the th yoke plate (22) through a rasp head bolt (23), a spring (27) is arranged between the end part of the rasp head bolt and the second yoke plate (24), and the th yoke plate fixing rod (26) is inserted into the yoke.
9. A dedicated capacitive current test stick according to claim 2 or 3, characterized in that the metal plate (31) is a copper plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911041103.1A CN110736881A (en) | 2019-10-30 | 2019-10-30 | Special capacitor current test operating rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911041103.1A CN110736881A (en) | 2019-10-30 | 2019-10-30 | Special capacitor current test operating rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110736881A true CN110736881A (en) | 2020-01-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911041103.1A Pending CN110736881A (en) | 2019-10-30 | 2019-10-30 | Special capacitor current test operating rod |
Country Status (1)
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| CN (1) | CN110736881A (en) |
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| CN205039536U (en) * | 2015-10-10 | 2016-02-17 | 黄智达 | Electric wire netting arc extinction device |
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| CN107345974A (en) * | 2017-06-23 | 2017-11-14 | 国网河南省电力公司电力科学研究院 | A kind of new test operation junction pole |
| CN206908242U (en) * | 2017-04-01 | 2018-01-19 | 北京威格赛电力工程有限公司 | A kind of new 10 KV transmission line guy structure |
| CN109061276A (en) * | 2018-08-31 | 2018-12-21 | 贵州电网有限责任公司 | A kind of isolated neutral system capacitance current test device and its test method |
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| US20020093326A1 (en) * | 2001-01-18 | 2002-07-18 | Bierer Walter S. | AC phasing voltmeter |
| CN202126444U (en) * | 2011-07-15 | 2012-01-25 | 安徽省电力公司淮北供电公司 | Multifunctional wiring operation rod for tests of high-altitude electric equipment |
| CN202221437U (en) * | 2011-10-14 | 2012-05-16 | 衡水供电公司 | Special-purpose test tool for electrified lightning arrester |
| CN202583299U (en) * | 2012-04-29 | 2012-12-05 | 沧州供电公司 | Special junction pole for testing capacitive current of neutral point ungrounded system |
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