CN205404685U - High voltage transmission lines induced voltage and direct current resistance measurement device - Google Patents
High voltage transmission lines induced voltage and direct current resistance measurement device Download PDFInfo
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- CN205404685U CN205404685U CN201620219275.9U CN201620219275U CN205404685U CN 205404685 U CN205404685 U CN 205404685U CN 201620219275 U CN201620219275 U CN 201620219275U CN 205404685 U CN205404685 U CN 205404685U
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Abstract
The utility model discloses a high voltage transmission lines induced voltage and direct current resistance measurement device, including the junction box, the junction box has the first montage mouth that is located the first side wall and is located the second montage mouth of second lateral wall, and first montage mouth corresponds three -phase direct current resistance input interface, and second montage mouth corresponds the three -phase induction voltage input interface, still includes: direct current measurement circuit includes the three -phase master switch that links to each other with first montage mouth, the first ammeter that is used for switching over three double -phase minute switch, power measuring the phase line and is used for the DC measurement, and induced voltage measurement circuit, include the partial pressure mechanism that links to each other with second montage mouth and be used for carrying out measuring second ammeter to the three phase voltage after the partial pressure mechanism partial pressure. The utility model discloses a main change over switch has been left out to the aspect, and on the other hand has realized increasing on induced voltage measurement circuit and has been used for resisting the partial pressure mechanism that the high pressure strikes to the problem that current measuring device middle and low voltage instrument and main change over switch were damaged by the high pressure has easily been overcome.
Description
Technical field
This utility model relates to a kind of high-tension line induced voltage and direct current resistance m easurem ent device.
Background technology
Newly-built and reconstruction high-tension overhead line before being taken into use, D.C. resistance and induced voltage need to be measured.
In prior art, tester is generally adopted circuit tester measurement induced voltage, measures D.C. resistance with accumulator battery, circuit tester and ammeter.Personal safety for guarantee test personnel, it is prevented that faradism is hurted sb.'s feelings, needs to wear insulating glove in test connection process.
Require when measuring induced voltage that high-tension line end is first by non-measured phase short circuit ground connection, to be measured mutually unsettled；Head end three-phase is all unsettled, and head end testing crew uses circuit tester to overlap three-phase successively, by measuring induced voltage mutually.
When measuring D.C. resistance, high-tension line end three-phase short circuit is earth-free；Head end biphase seals in DC loop by be measured.DC loop is concatenated as power supply by two Vehicular accumulator cells, then draw wire from power supply one end and concatenate the electric current that an indicator type current meter is used as measurement loop, then measured biphase (end is short circuit) being concatenated into DC loop, another pole (overlapping again when starting to test) being finally wired to accumulator battery constitutes DC experiment loop again.Before test, DC loop can not close, and during test, head end carries out manually overlap joint accumulator and constitutes DC loop, measures loop voltage with circuit tester, measures loop current with ammeter.
Above-mentioned hand dipping mode is excessively loaded down with trivial details, and Chinese patent CN104007294A discloses a kind of overhead transmission line parameter measurement termination, solves to connect, in prior art, the problem that thread-changing is loaded down with trivial details.This termination includes a junction box, the rear side wall of junction box is three-phase high-voltage pin interfaces, the left surface of junction box is that induced voltage draws measurement pile crown, the panel of junction box is provided with a main switching switch, it is achieved the switching of overhead transmission line induced voltage and D.C. resistance parameter measurement function.
In implementing measurement process, present inventor have discovered that low pressure instrument and main switching switch pole are subject to impacting with high pressure and damage.
Utility model content
The purpose of this utility model is in that to provide a kind of high-tension line induced voltage and direct current resistance m easurem ent device, it is possible to solve prior art mesolow instrument and the easy problem damaged by high pressure of main switching switch.
For this, this utility model provides a kind of high-tension line induced voltage and direct current resistance m easurem ent device, including junction box, junction box has the first group interface being positioned at the first side wall and the second group interface being positioned at the second sidewall, first group interface correspondence three-phase dc resistance input interface, second group interface correspondence three-phase induction voltage input interface, measurement apparatus also includes: DC measurement loop, including the three-phase main switch being connected with the first group interface, for three biphase switch-dividings of handover measurement phase line, power supply and the first ammeter for DC measurement；And induced voltage measurement loop, including the dividing potential drop mechanism being connected with the second group interface and the second ammeter for the three-phase voltage after dividing potential drop mechanism dividing potential drop is measured.
Further, above-mentioned dividing potential drop mechanism includes resistance board and GSS Gear Select Switch, and resistance board includes: be connected with the A phase line of high-tension line and for GSS Gear Select Switch select connect the first resistor and the second resistor is connected with the B phase line of high-tension line and for GSS Gear Select Switch select connect the 3rd resistor and the 4th resistor and is connected with the C phase line of high-tension line and for GSS Gear Select Switch selection connection the 5th resistor and the 6th resistor.The version of this dividing potential drop mechanism is not only suitable for utilizing Large Copacity resistance that high pressure carries out dividing potential drop, and has the partial pressure value feature being reliable, easy to implement optional, rational in infrastructure.
Further, above-mentioned DC measurement loop also includes diverter, and the first ammeter is for the direct current measurement after diverter is tapped, so that the first ammeter to be protected.
Further, above-mentioned first ammeter, the second ammeter are digital electric meter.
Further, above-mentioned three-phase main switch is three-phase air switch.
Further, the biphase switch-dividing of above three is three biphase air switches.
Further, above-mentioned power supply is constant-current source.
Further, above-mentioned high-tension line induced voltage and direct current resistance m easurem ent device, also include the alternating current-direct current switching instruction switch of table meter power supply for switching the first ammeter and the second ammeter.Compared with the main switching switch of prior art, this alternating current-direct current switching instruction switch is from impacting with high pressure, and there is instruction and measure the effect of object switching, when particularly the first ammeter and the second ammeter are digital electric meter, effect becomes apparent from, by switching, optional first ammeter works, also optional second ammeter work, thus playing instruction induced voltage to measure the function with direct current resistance m easurem ent.
Further, above-mentioned high-tension line induced voltage and direct current resistance m easurem ent device also include: first interface plate, are arranged in the inner chamber of junction box, and first interface plate is provided with the first group interface, and junction box is provided with the first jam plate in the face of first interface plate；And second interface board, it being arranged in the inside of junction box, the second interface board arranges the second group interface, junction box is provided with the second jam plate in the face of the second interface board.By being arranged in junction box by first interface plate and the second interface board, not only docking port plays a protective role, and also allows for docking port and controls further.
Further, above-mentioned high-tension line induced voltage and direct current resistance m easurem ent device also include the first electric control lockset for locking the first jam plate and for locking the second electric control lockset of the second jam plate, wherein, alternating current-direct current switching instruction switch is additionally operable to control unblanking of the first electric control lockset and the second electric control lockset.In this utility model, first jam plate and the second jam plate are opened and are carried out physical control by alternating current-direct current switching instruction switch, not only achieve and measure the deictic function selected, more achieve measuring the control function selected, it is clear that Billy is more reliable by the prior art of main switching switch.
Compared with the overhead transmission line parameter measurement termination of prior art, in this utility model, to measure loop mutually isolated for three-phase dc resistance input interface and DC measurement circuit and three-phase induction voltage input interface and induced voltage, eliminate main switching switch on the one hand, achieve on the other hand to measure at induced voltage and loop increases the dividing potential drop mechanism for resisting impacting with high pressure, thus overcoming the measurement apparatus mesolow instrument of prior art and main switching switch is subject to the problem that high pressure damages.
Except purpose described above, feature and advantage, this utility model also has other purpose, feature and advantage.Below with reference to figure, this utility model is described in further detail.
Accompanying drawing explanation
The Figure of description constituting the part of the application is used for providing being further appreciated by of the present utility model, and schematic description and description of the present utility model is used for explaining this utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the schematic perspective view of the high-tension line induced voltage according to this utility model one embodiment and direct current resistance m easurem ent device；
Fig. 2 is the DC loop figure of the high-tension line induced voltage according to this utility model one embodiment and direct current resistance m easurem ent device；
Fig. 3 is the ac circuit figure of the high-tension line induced voltage according to this utility model one embodiment and direct current resistance m easurem ent device；
Fig. 4 is the layout schematic diagram of the first interface plate of the high-tension line induced voltage according to another embodiment of this utility model and direct current resistance m easurem ent device, and wherein the first jam plate is in closure state；
Fig. 5 is the layout schematic diagram of the first interface plate of the high-tension line induced voltage according to another embodiment of this utility model and direct current resistance m easurem ent device, and wherein the first jam plate is in open mode；And
Fig. 6 is the structural representation of the alternating current-direct current switching instruction switch of the high-tension line induced voltage according to another embodiment of this utility model and direct current resistance m easurem ent device.
Description of reference numerals
1, junction box；2, three-phase induction voltage input interface；
3, three-phase dc resistance input interface；4, alternating current-direct current switching instruction switch；
5, three phase current AC voltmeter；6, gears regulating switch；
7, direct current table；8, three-phase air switch；
9,10,11 biphase air switch；12, first interface plate；
13, the first jam plate；14, biasing spring；
15, the first electric control lockset.
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
High-tension line induced voltage of the present utility model and direct current resistance m easurem ent device, including junction box, junction box has the three-phase dc resistance input interface being positioned at the first side wall, it is positioned at the three-phase induction voltage input interface of the second sidewall, measurement apparatus also includes: DC measurement loop, including the three-phase main switch with three-phase dc resistance input interface, for three biphase switch-dividings of handover measurement phase line, power supply and the first ammeter for DC measurement；And induced voltage measurement loop, including the dividing potential drop mechanism being connected with three-phase induction voltage input interface and the second ammeter for the three-phase voltage after dividing potential drop mechanism dividing potential drop is measured.
According to an embodiment of the present utility model, first ammeter is chosen as direct current table 7, especially digital DC table, three-phase main switch is chosen as three-phase air switch 8, second ammeter is preferably three phase current AC voltmeter 5, especially digital three phase A.C. voltmeter, three biphase switch-dividing respectively biphase air switches 9,10,11, power supply is preferably the constant-current source of 20A.
Junction box 1 is as the body of device, three-phase induction voltage input interface 2 is arranged on rear side or the front side of junction box 1, wherein, three-phase induction voltage input interface 2 is arranged on the front side of junction box and then facilitates the wiring of internal circuit, but high-voltage conducting wires and operator are positioned at the same side, should be noted that during operation.
The left surface of junction box is provided with three-phase dc resistance input interface 3, is provided with alternating current-direct current switching instruction switch 4, three phase current AC voltmeter 5, gears regulating switch 6, direct current table 7, three-phase air switch 8, biphase air switch 9,10,11 on junction box's panel.
Alternating current-direct current switching instruction switch 4, for the table meter power supply in the AC and DC measurement loop of switching device, Fig. 2 is the ac circuit figure that DC loop figure, Fig. 3 are this utility model device of this utility model device.
In conjunction with reference to Fig. 2, in direct current resistance m easurem ent loop, direct current table 7 concatenates three-phase air switch (KM08) 8, biphase air switch (KM1, KM2, KM3) 9,10,11, by three-phase dc resistance input interface 3, high-tension line is sealed in DC loop, by power supply supply test electric current.
This DC measurement loop also includes diverter FL, for DC current is tapped, detects for direct current table 7.
Set up the design of dividing potential drop mechanism according to this utility model, this dividing potential drop mechanism should meet the requirement of high pressure dividing potential drop, and this utility model provides the dividing potential drop mechanism of a kind of optional dividing potential drop gear, and this dividing potential drop mechanism includes resistance board and gears regulating switch 6.
In conjunction with reference to Fig. 3, measuring in loop at induced voltage, three phase current AC voltmeter 5 concatenates Large Copacity resistance R1-R6 and gears regulating switch 6, it is achieved third gear regulates, and by three-phase induction voltage input interface 2, is connected to high-tension line, the AC portion of component devices.
Wherein, resistance board includes resistor R1 and the R2 being connected to the A phase line of high-tension line, it is connected to resistor R3 and the R4 of the B phase line of high-tension line, and it is connected to resistor R5 and the R6 of the C phase line of high-tension line, wherein gears regulating switch includes 1X shelves, 10X shelves and 100X shelves, when selecting 1X shelves directly respectively with A phase line, B phase line and C phase line connect, series resistor R1 when selecting 10X shelves and between A phase line, with B phase line series resistor R3, with C phase line series resistor R5, series resistor R1 and R2 when selecting 100X shelves and between A phase line, with B phase line series resistor R3 and R4, with C phase line series resistor R5 and R6.
Below it is only embodiments coordinating with resistance board of three gears regulating switch, in other embodiments, it is possible to set other gear and the resistor of corresponding number of matches.
The work process of measurement apparatus of the present utility model is as follows:
Measuring D.C. resistance: high-tension line end three-phase short circuit is earth-free, three-phase high-voltage test lead is accessed three-phase dc resistance input interface 3 by head end, by alternating current-direct current switching instruction switch 4, is switched to DC shelves, connects fairing power supply, and close three-phase air switch KM0.Close biphase air switch KM1, reads and record the DC voltage in AB loop, current value by direct current table 7, is then turned off biphase air switch KM1；Close biphase air switch KM2, reads and record the DC voltage in AC loop, current value by direct current table 7, is then turned off biphase air switch KM2；Close biphase air switch KM3, reads and record the DC voltage in BC loop, current value by direct current table 7, is then turned off biphase air switch KM3.Disconnecting three-phase air switch KM0, disconnect fairing power supply, take off three-phase high-voltage test lead, D.C. resistance test terminates.
Measure induced voltage: by high-tension line end first by non-measured phase short circuit ground connection, gears regulating switch 6 is switched to the most high-grade, alternating current-direct current switching instruction switch 4 is switched to AC shelves, head end three-phase high-voltage test lead is accessed three-phase induction voltage input interface 3, regulation stall regulates switch 6, reading record three-phase induction voltage, take off three-phase high-voltage test lead, induced voltage test terminates.
The performance of the device according to this utility model one embodiment is as follows: induced voltage measurement has 1 times, decay 10 times, 100 times of three gears of decay.Circuit directly hinders employing 20A constant-current source, and electric current output is stable.
1) induced voltage is measured
(1) three phase current AC voltmeter indication range: AC15V～AC500V
(2) induced voltage measures scope: AC15V～AC5000V
× 1 grade: AC15V～AC200V
× 10 grades: AC200V～AC2000V
× 100 grades: AC2000V～AC5000V
(3) certainty of measurement: ± 2%
2) circuit directly hinders measurement
(1) output electric current: DC20A
(2) maximum output voltage: DC18V
(3) voltage, current precision: ± 2%
Measuring process corresponding to above-mentioned measurement apparatus is as follows:
1) induced voltage is measured
(1) power line and ground wire are connected
(2) select to get to " × 100 " position by gear, selection switch is got to " AC " position
(3) turn on the power switch
(4) p-wire is connected.By the value of display voltage on A.C. voltmeter, if voltage is " 0 ", regulate gear.(A.C. voltmeter will not show at below 15V, the highest can arrive 500V)
2) circuit directly hinders measurement
(1) power line and ground wire are connected
(2) selection switch is got to " DC " position
(3) turn on the power switch
(4) p-wire is connected
(5) open dc switch, and open " AB ", " BC ", " CA " switch respectively, measure the electric current of AB, BC, CA, magnitude of voltage respectively.
It should be noted that " AB ", " BC ", " CA " switch be namely corresponding three biphase air switch KM1, KM2, KM3 in Fig. 2, it is in an open position that they can only select one.
According to high-tension line induced voltage of the present utility model and direct current resistance m easurem ent device, the rear surface of junction box or front face are arranged three-phase induction voltage input interface, high-tension line is accessed induced voltage and measures loop, the left side wall of junction box arranges three-phase dc resistance input interface, high-tension line is accessed DC measurement loop, the guidance panel of junction box arranges alternating current-direct current switching instruction switch, this alternating current-direct current switching instruction switch serves not only as switching table meter power supply and uses, also act instruction direct current or the purpose of AC measurment switching, avoid main Switch structure in prior art complicated simultaneously, it is subject to the problem that impacting with high pressure damages.
In this utility model, table meter power supply is construed as the power supply maintaining direct current table and three-phase voltage meter work.
Induced voltage according to measurement apparatus of the present utility model measures loop, can select to seal in Large Copacity resistance by gears regulating switch and carry out dividing potential drop, solve the problem that low-voltage ac voltage table is caused by impacting with high pressure damaging, and guarantee to measure voltage in low-voltage ac voltage table range ability.
It is pointed out that the selection of each electric component of the measurement apparatus of above-described embodiment is exemplary, it will be understood by those skilled in the art that these electric components can be replaced by other electric components of identical function.Such as air switch can be replaced by chopper switch.
According to another embodiment of the present utility model, as shown in Figure 4 and Figure 5, part unlike the embodiments above is in that, three-phase induction voltage input interface 2 and three-phase dc resistance input interface 3 are arranged in junction box all in the following way.
Illustrate for three-phase induction voltage input interface 2 below.
Three-phase induction voltage input interface 2 is arranged on first interface plate 12; and first interface plate 12 is arranged in the inner chamber of junction box 1; the position of first interface plate is provided with the first jam plate 13 by junction box 1 above simultaneously, it is achieved that the protection to three-phase induction voltage input interface 2.
In one embodiment, above-mentioned first jam plate 13 adopts and downwardly turns over the mode opened, further, there is provided biasing spring 14 so that the first jam plate has the trend outwards flicked when unblanking, this biasing spring is torsion spring in the present embodiment, can being helical spring in other embodiments so that the first jam plate downwardly turns in the way of flicking and opens, the operation clear and definite to operator be guided.
Further, above-mentioned measurement apparatus also includes the first electric control lockset 15 for locking the first jam plate 13, and alternating current-direct current switching instruction switch 4 is for controlling unblanking of the first electric control lockset 15.
Equally; three-phase dc resistance input interface 3 is arranged on the second interface board; second interface board is also disposed in the inside of junction box, above junction box, the position of the second interface board is provided with the second jam plate, it is achieved that the protection (not shown) to three-phase induction voltage input interface simultaneously.This second jam plate is also adopted by downwardly turning over the mode opened, further, there is provided biasing spring so that the second jam plate has the trend outwards flicked when unblanking, this biasing spring is torsion spring in the present embodiment, can be helical spring in other embodiments, second jam plate being downwardly turned in the way of flicking open, the operation clear and definite to operator is guided.Further, above-mentioned measurement apparatus also includes the second electric control lockset for locking the second jam plate, and alternating current-direct current switching instruction switch 4 is for controlling unblanking of the second electric control lockset.
Fig. 6 illustrates the structure of an embodiment of the alternating current-direct current switching instruction switch according to this utility model measurement apparatus, as shown in Figure 6, should be rotary switch with regard to direct current switching instruction switch, wherein, slide block P1 and P2 is driven by switching knob, and 1. and 2. slide block P1 and a pair stationary contact coordinate answers the table meter power supply of three-phase voltage meter in voltage measurement circuit, slide block P2 and a pair stationary contact 3. and 4. to coordinate for Perceived control to answer unblanking of the first electric control lockset in voltage measurement circuit for Perceived control.When slide block P1 and P2 rotates an angle together to neutral position, disconnection coordinates with original stationary contact, when being rotated further a gear, 5. and 6. slide block P1 and a pair stationary contact coordinate the table meter power supply for controlling the direct current table in direct current resistance m easurem ent loop, and 7. and 8. slide block P2 now just coordinates with a pair static electric shock, be used for controlling unblanking of the second electric control lockset in direct current resistance m easurem ent loop.
In this utility model, the first electric control lockset 15 and the second electric control lockset are unblanked by alternating current-direct current switching instruction switch 4 when switching table meter power supply simultaneously.So, first jam plate and the unlatching of the second jam plate are carried out physical control by alternating current-direct current switching instruction switch 4, not only achieving and measure the deictic function selected, more achieve measuring the control function selected, the obvious Billy of this control is more rationally reliable by the existing measurement apparatus of main switching switch.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Claims (10)
1. high-tension line induced voltage and a direct current resistance m easurem ent device, including junction box, described junction box has the first group interface being positioned at the first side wall and the second group interface being positioned at the second sidewall, it is characterised in that
Described first group interface correspondence three-phase dc resistance input interface, described second group interface correspondence three-phase induction voltage input interface, described measurement apparatus also includes:
DC measurement loop, including the three-phase main switch being connected with described first group interface, for three biphase switch-dividings of handover measurement phase line, power supply and the first ammeter for DC measurement；And
Induced voltage measures loop, including the dividing potential drop mechanism being connected with described second group interface and the second ammeter for the three-phase voltage after described dividing potential drop mechanism dividing potential drop is measured.
2. high-tension line induced voltage according to claim 1 and direct current resistance m easurem ent device, it is characterized in that, described dividing potential drop mechanism includes resistance board and GSS Gear Select Switch, described resistance board includes: is connected with the A phase line of high-tension line and selects the first resistor and the second resistor that connect for described GSS Gear Select Switch, it is connected with the B phase line of high-tension line and selects the 3rd resistor and the 4th resistor that connect for described GSS Gear Select Switch, and be connected with the C phase line of high-tension line and select the 5th resistor and the 6th resistor that connect for described GSS Gear Select Switch.
3. high-tension line induced voltage according to claim 1 and direct current resistance m easurem ent device, it is characterised in that described DC measurement loop also includes diverter, described first ammeter is for the direct current measurement after described diverter is tapped.
4. high-tension line induced voltage according to claim 1 and direct current resistance m easurem ent device, it is characterised in that described first ammeter, the second ammeter are digital electric meter.
5. high-tension line induced voltage according to claim 1 and direct current resistance m easurem ent device, it is characterised in that described three-phase main switch is three-phase air switch.
6. high-tension line induced voltage according to claim 1 and direct current resistance m easurem ent device, it is characterised in that described three biphase switch-dividings are three biphase air switches.
7. high-tension line induced voltage according to claim 1 and direct current resistance m easurem ent device, it is characterised in that described power supply is constant-current source.
8. high-tension line induced voltage according to any one of claim 1 to 7 and direct current resistance m easurem ent device, it is characterised in that the alternating current-direct current switching instruction also including the table meter power supply for switching described first ammeter and described second ammeter switchs.
9. high-tension line induced voltage according to claim 8 and direct current resistance m easurem ent device, it is characterised in that also include:
First interface plate, is arranged in the inner chamber of junction box, and described first interface plate is provided with described first group interface, and described junction box is provided with the first jam plate in the face of described first interface plate；And
Second interface board, is arranged in the inside of junction box, and described second interface board arranges described second group interface, and described junction box is provided with the second jam plate in the face of described second interface board.
10. high-tension line induced voltage according to claim 9 and direct current resistance m easurem ent device, it is characterized in that, also include the first electric control lockset for locking the first jam plate and for locking the second electric control lockset of the second jam plate, wherein, described alternating current-direct current switching instruction switch is additionally operable to control unblanking of described first electric control lockset and the second electric control lockset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620219275.9U CN205404685U (en) | 2016-03-21 | 2016-03-21 | High voltage transmission lines induced voltage and direct current resistance measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620219275.9U CN205404685U (en) | 2016-03-21 | 2016-03-21 | High voltage transmission lines induced voltage and direct current resistance measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205404685U true CN205404685U (en) | 2016-07-27 |
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| CN201620219275.9U Expired - Fee Related CN205404685U (en) | 2016-03-21 | 2016-03-21 | High voltage transmission lines induced voltage and direct current resistance measurement device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785130A (en) * | 2016-03-21 | 2016-07-20 | 国家电网公司 | High-voltage line induced voltage and direct-current resistance measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785130A (en) * | 2016-03-21 | 2016-07-20 | 国家电网公司 | High-voltage line induced voltage and direct-current resistance measuring device |
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