CN203849294U - Overhead line parameter measuring line connecting device - Google Patents
Overhead line parameter measuring line connecting device Download PDFInfo
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- CN203849294U CN203849294U CN201420301267.XU CN201420301267U CN203849294U CN 203849294 U CN203849294 U CN 203849294U CN 201420301267 U CN201420301267 U CN 201420301267U CN 203849294 U CN203849294 U CN 203849294U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 230000003068 static effect Effects 0.000 claims description 37
- 238000005259 measurement Methods 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 22
- 230000006698 induction Effects 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 description 38
- 238000000034 method Methods 0.000 description 9
- 238000009413 insulation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Abstract
The utility model discloses an overhead line parameter measuring line connecting device. The device comprises a three-phase high-voltage lead interface, a main diverter switch, three induction voltage lead-out measuring pile heads, three alternating-current voltage meters, a direct-current voltage meter, a direct-current current meter, three air switches and a rectifying device. The three-phase high-voltage lead interface is formed in the rear side of a box body, and used for introducing an overhead line, the main diverter switch is arranged above a device panel, and switching of the overhead line induction voltage and direct-current resistance parameter measuring function can be achieved. The induction voltage lead-out measuring pile heads are arranged on the left side of the device, can be externally connected with an instrument for achieving the measuring function, the alternating-current voltage meters can be used for measuring the induction voltage, the direct-current voltage meter and the direct-current current meter can be used for measuring voltage and current in a direct-current resistance measuring loop, the air switches are used for achieving selection of a direct-current measuring loop, and the rectifying device achieves conversion of the alternating current and the direct current, and is used for completing direct-current resistance measuring. The device can solve the problem that in the prior art, line connecting and replacing are complex.
Description
Technical field:
The utility model relates to a kind of overhead transmission line parameter measurement termination.
Background technology:
Newly-built and reconstruction high-tension overhead line before coming into operation; need to check line insulation situation, check phase place; measure direct current resistance and various power frequency parameter value, using as computing system short-circuit current, calculate the realistic basis of the work such as selection of trend distribution, relay protection setting and the reasonable method of operation.
In prior art, tester generally adopts the manual mode of connection, realizes being connected of testing apparatus and tested transmission line of electricity.The thread-changing that connects of induced voltage, nuclear phase, insulation resistance and the direct current resistance m easurem ent link in current overhead transmission line parameter experiment project operates too loaded down with trivial details:
Before wiring, the testing crew of the overhead transmission line head and end earthing switch blade that will first close respectively, then with overhead jointing clamp, articulate bare copper wire, with para tape, be strained and fixed again, prepare test, for warranty test personnel's personal safety, prevent that induced electricity from hurting sb.'s feelings, in whole test connection process, need to wear insulating glove.
While measuring induced voltage, require end first by non-measurement phase short circuit ground connection, to be measured mutually unsettled; Head end three-phase is all unsettled, and then head and end pulls open earthing switch blade, and head end testing crew is brought into use multimeter to overlap successively three-phase to measure induced voltage nuclear phase, after re-use insulation resistance meter three-phase carried out to insulation measurement.After above-mentioned experiment process, also complete induced voltage and the insulation measurement of a phase, in measuring process, can check the separate whether corresponding of this phase head and end simultaneously.After one phase study completes, need to contact again line end testing crew and change wiring, the end testing crew earthing switch blade that conventionally can again close now, and then carry out thread-changing and repeat above-mentioned test operation.The head and end earthing switch blade that again closes after three-phase test all completes, prepares direct current resistance test.
While measuring direct current resistance, require line end testing crew that three-phase short circuit is earth-free; Head end testing crew seals in DC loop by two-phase to be measured.DC loop is generally as power supply by two Vehicular accumulator cell serial connections, then from power supply one end, draw indicator type current meter of wire serial connection as the electric current measuring circuit, and then measured two-phase (end is short circuit) is connected in series into DC loop, another utmost point (overlapping again while starting to test) that is finally wired to battery pack forms DC experiment loop.Before test, DC loop can not be closed, during test, want head and end to pull open earthing switch blade, head end has a testing crew manually to overlap at the trial accumulator formation DC loop, can regard the switch as DC loop as, separately to there is a testing crew to be responsible for wanting multimeter overlap joint battery pack the two poles of the earth reading loop voltage, also need a testing crew to be responsible for the reading of reometer in reading loop, the testing crew of being responsible for record will record read trial voltage, current value in time.After above-mentioned test completes, the head end testing crew earthing switch blade that closes, changes test connection, measures voltage, the current value of another two-phase by above-mentioned steps, until after three groups of tests all complete, and the head and end earthing switch blade that closes, direct current resistance test finishes.
The above-described thread-changing complicated operation that connects, tester needs direct engaged test line when wiring.When line-frequency induction voltage is lower in tested transmission line of electricity, can produce mild electrical shock to tester.But, when line-frequency induction voltage is higher, can seriously wound tester, even cause tester dead.
Although in prior art, can adopt and wear insulating glove and carry out wiring with warranty test personnel's personal safety.But insulating glove is generally all thicker, it is very inconvenient that tester puts on insulating glove wiring, is easy to cause wiring not firm, process and the measuring accuracy of impact test.
Summary of the invention:
For overcoming the defect of prior art, the purpose of this utility model is to provide a kind of overhead transmission line parameter measurement termination, can solve and in prior art, connect the loaded down with trivial details problem of thread-changing.Can realize effective isolation of testing crew and electrified body in process of the test simultaneously, thus the personal safety of guarantee testing crew.
The utility model technical solution problem adopts following technical scheme:
Overhead transmission line parameter measurement termination, is provided as the junction box of termination body, is provided with three-phase high-voltage lead-in wire interface in described junction box's side, and another side is provided with induced voltage and draws measurement pile crown;
On junction box's panel, be provided with main change-over switch, the switching knob that described main change-over switch has discoidal switch base and can rotate in switch base, in described switch base, be along the circumferential direction intervally distributed with three groups of static contacts, every group of static contact comprises five fixed contacts of equidistantly arranging; On described switching knob, be interval with three slide blocks corresponding with described three groups of static contacts, slide block energy and can only simultaneously contacting with three described fixed contacts described in each;
On junction box's panel, be also provided with three A.C. voltmeters, a D.C. voltmeter, a DC ammeter, three air switches and a fairing; Overhead transmission line three-phase high-voltage line, through described three-phase high-voltage lead-in wire interface access junction box, is connected with the 3rd fixed contact of every group of static contact; The 5th fixed contact of every group of static contact connects respectively described three A.C. voltmeters through lead-in wire, and three described induced voltages are drawn measurement pile crown and are connected with the 5th fixed contact of every group of static contact respectively through lead-in wire;
Described D.C. voltmeter, DC ammeter are connected in the DC loop of described fairing conversion, two circuits of described DC loop are connected in parallel on described three air switches, in three groups of static contacts of switch base, the first fixed contact of the one the second static contact is connected with the first air switch, the first fixed contact of the two or three group of static contact is connected with the second air switch, and the first fixed contact of the 3rd the first static contact is connected with the 3rd air switch.
Three-phase high-voltage lead-in wire interface is positioned at wiring casing body rear side, for the introducing of overhead transmission line; Main change-over switch is positioned on device panel, realizes the switching of overhead transmission line induced voltage and direct current resistance parameter measurement function; Induced voltage is drawn measurement pile crown and is positioned at wiring casing left side, can realize measurement function by extension instrument; A.C. voltmeter is used for measuring induced voltage; D.C. voltmeter and DC ammeter are in order to measure voltage and the electric current in direct current resistance m easurem ent loop; Air switch is realized the selection in direct current measurement loop; Fairing is realized the conversion of alternating current-direct current, in order to complete direct current resistance m easurem ent.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
The utility model can be selected corresponding measurement function by main change-over switch, has simplified in process of the test and has manually connect the frequency of thread-changing, solves in prior art and connects the loaded down with trivial details problem of thread-changing.Meanwhile, of the present utility modelly allly connect thread-changing operation and all in overhead transmission line parameter measurement termination, complete, realized the isolation of testing crew and electrified body in process of the test, personal safety that can effective guarantee testing crew.
Accompanying drawing explanation:
Fig. 1 is the stereographic map of the utility model device; Fig. 2 is main change-over switch theory diagram; Fig. 3 is the switching knob schematic diagram of main change-over switch; Fig. 4 is internal circuit diagram of the present utility model.
Number in the figure: 1 junction box, 2 three-phase high-voltage lead-in wire interfaces, 3 induced voltages are drawn measurement pile crown, 4 main change-over switches, 5 switching knobs, 6 switch base, 7 slide blocks, 8 A.C. voltmeters, 9 D.C. voltmeters, 10 DC ammeter, 11 first air switches, 12 second air switches, 13 the 3rd air switches.
Below pass through embodiment, and the utility model is described in further detail by reference to the accompanying drawings.
Embodiment:
Embodiment: in conjunction with Fig. 1, be provided as the junction box 1 of termination body, be provided with three holes in junction box 1 rear side side, as three-phase high-voltage lead-in wire interface 2, junction box another side (left surface) is provided with three induced voltages and draws measurement pile crown 3;
On junction box's panel, be provided with main change-over switch 4, shown in Fig. 2,3, the switching knob 5 that this main change-over switch has discoidal switch base 6 and can rotate in switch base, in switch base, be along the circumferential direction intervally distributed with three groups of static contacts, every group of static contact comprises five fixed contacts of equidistantly arranging; Three groups of static contacts are numbered respectively Group I, Group II and Group III, 2. 3. 4. 5. 1. each five fixed contacts organizing static contact be numbered respectively, each group # for fixed contact 2., be 4. neutral, on switching knob, be interval with and three groups of three slide blocks 7 that static contact is corresponding, each slide block energy and can only simultaneously contacting with three fixed contacts, three slide blocks can distinguish three groups of static contacts of corresponding conducting 1., 3. fixed contact or 3., 5. fixed contact.
On junction box's panel, be also provided with three A.C. voltmeters 8, D.C. voltmeter 9, DC ammeter 10, three air switches and fairings; Overhead transmission line three-phase high-voltage line, through three-phase high-voltage lead-in wire interface 2 access junction boxes 1, is connected with the 3rd fixed contact (numbering 3.) of every group of static contact; The 5th fixed contact of every group of static contact (numbering 5.) connects respectively three A.C. voltmeters through lead-in wire, and three induced voltages of junction box's left surface are drawn measurement pile crown 3 and are connected with the 5th fixed contact (numbering 5.) of every group of static contact respectively through lead-in wire.
Shown in Fig. 2,4, D.C. voltmeter 9, DC ammeter 10 are connected in the DC loop of fairing conversion, two circuits of DC loop are connected in parallel on three air switches, in three groups of static contacts of switch base 6, the first fixed contact of I Group II static contact (numbering 1.) is connected with the first air switch 11, the first fixed contact of II Group III static contact (numbering 1.) is connected with the second air switch 12, and the first fixed contact of III Group I static contact (numbering 1.) is connected with the 3rd air switch 13.
Shown in Fig. 3, in conjunction with foregoing, analyze the principle that realizes of the main change-over switch of the utility model: when switching knob is during in X shelves, three slide blocks 7 are respectively in 2. 3. 4. on fixed contact, now in neutral state of each group static contact; When switching knob is threaded to Y shelves, three slide block 7 synchronous slides, to 1. 2. 3. on fixed contact of each group static contact, are realized 1. 3. conducting; When switching knob is threaded to Z shelves, three slide block 7 synchronous slides, to 3. 4. 5. on fixed contact of each group static contact, are realized 3. 5. conducting;
The course of work of the present utility model is as follows:
Preliminary work before test: first the earthing switch blade at overhead transmission line to be measured two ends is closed, then use overhead jointing clamp to articulate bare copper wire by under three couplings and be fixed on para tape and (keep the alternate mutually insulated of lead-in wire) at overhead transmission line head and end.Then overhead transmission line head end lead-in wire is introduced in this measurement termination again, A, B, C triple-phase line are connected with the 3rd fixed contact (numbering 3.) of three groups of static contacts respectively.
During on-test, first measure induced voltage (also can realize nuclear phase) simultaneously, now that overhead transmission line end A to be measured is mutually unsettled, B, C two-phase short circuit ground connection, after said process completes, overhead transmission line head and end pulls open earthing switch blade, the main change-over switch knob of device is threaded to Z shelves, by three A.C. voltmeters, read three-phase induction voltage (now real in measuring A line induced voltage, why read three-phase voltage, mainly in order to compare with A phase voltage value, due to B, C phase line end is ground connection, the B measuring, C voltage should be far smaller than the voltage that A records mutually, thereby realized the nuclear phase of circuit, the A phase that is head end is mutually corresponding with the A of end), measure after A phase induced voltage, can draw and measure the insulation resistance (external megohmmeter measurement) that pile crown is measured three-phase by the induced voltage in junction box left side, the B now recording, the insulating resistance value of C two-phase also should be mutually less than normal than A, thereby reaffirmed that head and end phase sequence is corresponding.The data of test data sheet only have inductive voltage value and the insulating resistance value of measurement phase (A phase), and whether this phase of head and end is corresponding.After completing, main change-over switch knob is threaded to neutral gear, then contacts overhead transmission line end personnel by end A, C short circuit ground connection, B is mutually unsettled, repeats above step, completes the measurement of B phase induced voltage.The measurement operation of C phase in like manner.
Induced voltage measurement completes, overhead transmission line end need be earth-free by three-phase short circuit, then head end testing crew is threaded to Y shelves by the main change-over switch knob of this device, carry out direct current resistance m easurem ent, first the first air switch (AB sky is opened) closes, read voltage and the electric current of AB DC loop, then disconnecting AB sky opens, the second air switch (BC sky is opened) again closes, read voltage and the electric current of BC DC loop, then be the 3rd air switch (CA sky is opened) that closes, read voltage and the electric current of CA DC loop.
The use of this device leaves it at that, and the head end earthing switch blade that closes, takes off this device.
Claims (1)
1. overhead transmission line parameter measurement termination, it is characterized in that, be provided as the junction box (1) of termination body, be provided with three-phase high-voltage lead-in wire interface (2) in described junction box's side, another side is provided with induced voltage and draws measurement pile crown (3);
On junction box's panel, be provided with main change-over switch (4), the switching knob (5) that described main change-over switch has discoidal switch base (6) and can rotate in switch base, in described switch base, be along the circumferential direction intervally distributed with three groups of static contacts, every group of static contact comprises five fixed contacts of equidistantly arranging; On described switching knob, be interval with three slide blocks (7) corresponding with described three groups of static contacts, slide block energy and can only simultaneously contacting with three described fixed contacts described in each;
On junction box's panel, be also provided with three A.C. voltmeters (8), a D.C. voltmeter (9), a DC ammeter (10), three air switches and a fairing; Overhead transmission line three-phase high-voltage line, through described three-phase high-voltage lead-in wire interface (2) access junction box (1), is connected with the 3rd fixed contact of every group of static contact; The 5th fixed contact of every group of static contact connects respectively described three A.C. voltmeters through lead-in wire, and three described induced voltages are drawn measurement pile crown (3) and are connected with the 5th fixed contact of every group of static contact respectively through lead-in wire;
Described D.C. voltmeter (9), DC ammeter (10) are connected in the DC loop of described fairing conversion, two circuits of described DC loop are connected in parallel on described three air switches, in three groups of static contacts of switch base, the first fixed contact of the one the second static contact is connected with the first air switch, the first fixed contact of the two or three group of static contact is connected with the second air switch, and the first fixed contact of the 3rd the first static contact is connected with the 3rd air switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420301267.XU CN203849294U (en) | 2014-06-06 | 2014-06-06 | Overhead line parameter measuring line connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420301267.XU CN203849294U (en) | 2014-06-06 | 2014-06-06 | Overhead line parameter measuring line connecting device |
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| Publication Number | Publication Date |
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| CN203849294U true CN203849294U (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420301267.XU Expired - Lifetime CN203849294U (en) | 2014-06-06 | 2014-06-06 | Overhead line parameter measuring line connecting device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007294A (en) * | 2014-06-06 | 2014-08-27 | 国家电网公司 | Overhead line parameter measurement wiring device |
| CN109100591A (en) * | 2018-07-30 | 2018-12-28 | 国网辽宁省电力有限公司铁岭供电公司 | Overhead transmission line comprehensive test apparatus |
| CN109932532A (en) * | 2019-03-18 | 2019-06-25 | 国网内蒙古东部电力有限公司电力科学研究院 | One kind being used for line influence electric test platform and method |
| CN111679113A (en) * | 2020-06-04 | 2020-09-18 | 贵州电网有限责任公司 | Auxiliary device for accessing secondary equipment to bus voltage without power failure |
-
2014
- 2014-06-06 CN CN201420301267.XU patent/CN203849294U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007294A (en) * | 2014-06-06 | 2014-08-27 | 国家电网公司 | Overhead line parameter measurement wiring device |
| CN104007294B (en) * | 2014-06-06 | 2017-02-01 | 国家电网公司 | Overhead line parameter measurement wiring device |
| CN109100591A (en) * | 2018-07-30 | 2018-12-28 | 国网辽宁省电力有限公司铁岭供电公司 | Overhead transmission line comprehensive test apparatus |
| CN109100591B (en) * | 2018-07-30 | 2021-04-20 | 国网辽宁省电力有限公司铁岭供电公司 | Overhead line comprehensive tester |
| CN109932532A (en) * | 2019-03-18 | 2019-06-25 | 国网内蒙古东部电力有限公司电力科学研究院 | One kind being used for line influence electric test platform and method |
| CN111679113A (en) * | 2020-06-04 | 2020-09-18 | 贵州电网有限责任公司 | Auxiliary device for accessing secondary equipment to bus voltage without power failure |
| CN111679113B (en) * | 2020-06-04 | 2022-08-19 | 贵州电网有限责任公司 | Auxiliary device for accessing secondary equipment to bus voltage without power failure |
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