CN211505705U - CVT (continuously variable transmission) multi-item dielectric loss test system - Google Patents
CVT (continuously variable transmission) multi-item dielectric loss test system Download PDFInfo
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- CN211505705U CN211505705U CN201922283214.5U CN201922283214U CN211505705U CN 211505705 U CN211505705 U CN 211505705U CN 201922283214 U CN201922283214 U CN 201922283214U CN 211505705 U CN211505705 U CN 211505705U
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Abstract
A CVT multi-item dielectric loss test system comprises a multifunctional test device, wherein a primary side capacitor wiring point, a secondary side winding wiring point and a dielectric loss tester wiring point are arranged on the multifunctional test device, the primary side capacitor wiring point is electrically connected with a primary side capacitor on a capacitor voltage transformer, the secondary side winding wiring point is electrically connected with a secondary side coil on the capacitor voltage transformer, and the dielectric loss tester wiring point is electrically connected with a test point on a dielectric loss tester. The capacitance voltage transformer is combined through the internal relay to achieve various dielectric loss measurement connection methods, combined jack wiring is convenient to operate, efficiency is improved, time is saved, and safety risks caused by multiple climbing of conversion of wiring modes are avoided.
Description
Technical Field
The utility model belongs to the power equipment field, especially a CVT multinomial is situated between and decreases test system.
Background
At present, in the capacitive voltage transformer CVT test process, generally adopt the dielectric loss tester to measure, in the test process, often need overhead test line or ascend a height the operation wiring repeatedly, often meet its line length too little when a high-voltage test simultaneously, need low pressure test line substitute line as the input line once, there is not special shielding on the substitute line, the test process need can satisfy test voltage and shielding requirement to substitute line frame empty state, if meet the humid weather of air, often lead to the data to worsen because of the high voltage dizzy to the air, seriously influence the test result. In addition, in the CVT terminal junction box, the primary tail and the secondary wire need to be continuously changed in wiring mode to measure data in the test process, and the wire needs to be lifted up to change after each test is completed, so that great potential safety hazards exist; CVT primary terminal and secondary line are in same terminal box, the terminal ratio is more, use the pincers formula binding post, often because of contact failure some problems appear, for example binding post contact is insecure, the pincers clamp leads to contact failure etc. because of the outer surface of bolt corrodes for a long time at the screw surface, this part terminal need cooperate once partly repeatedly use various positive and negative wiring mode to satisfy the experimental requirement, consequently just need to change the wiring mode repeatedly at the testing process, and change the test line and belong to high altitude construction, the high altitude falls very easily appears, the test line connects wrong and leads to once test voltage to get into secondary equipment or the distance too closely arouse discharge scheduling problem.
In the prior art, there is a scheme for improving the above problems, and chinese patent document CN103063931A describes a 500kV CVT multi-item dielectric loss test system, in which a test circuit is transformed by switching of vacuum relay contacts, but due to the layout limitation of the vacuum relay, the switching on the connection method can only be realized on a limited capacitor, and in addition, there is a case of measurement error in the actual measurement, and the authenticity of the result can be determined by the switching on the connection method, which cannot be used because the switching connection method is limited in this system; the transformer inside the device makes the device heavy, which is not beneficial to popularization and use.
Disclosure of Invention
The utility model aims to solve the technical problem that a CVT multinomial is situated between and is decreased test system is provided, through the various dielectric loss measurement access that realize capacitive voltage transformer of the combination of internal relay on multi-functional testing arrangement, need not change the wiring mode repeatedly because of the conversion access, also need not to climb the wiring many times.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
a CVT multi-item dielectric loss test system comprises a multifunctional test device, wherein a primary side capacitor wiring point, a secondary side winding wiring point and a dielectric loss tester wiring point are arranged on the multifunctional test device, the primary side capacitor wiring point is electrically connected with a primary side capacitor on a capacitor voltage transformer, the secondary side winding wiring point is electrically connected with a secondary side coil on the capacitor voltage transformer, the dielectric loss tester wiring point is electrically connected with a testing point on a dielectric loss tester, and all the wiring points are directly connected through a plug socket or a wiring terminal.
The primary side capacitor wiring point is electrically connected with one end of a primary side capacitor relay in the multifunctional testing device, the other end of the primary side capacitor relay is connected with a high-voltage jack on the multifunctional testing device, and the high-voltage jack is used for being connected with a high-voltage output end of the dielectric loss measuring instrument.
The primary side grounding relay is electrically connected with the ground wire, the other end of the primary side testing relay is electrically connected with the testing wire jack, and only one of the primary side grounding relay and the primary side testing relay is switched on at the same time.
One end of the secondary side winding wiring point is electrically connected with a secondary side coil of the capacitor voltage transformer, the other end of the secondary side winding wiring point is electrically connected with one end of a secondary side test relay, the other end of the secondary side test relay is electrically connected with a ground wire, and secondary side wiring can achieve three wiring modes of short circuit grounding, suspension and short circuit at two ends of the secondary side through the relay.
The multifunctional testing device is provided with a testing button, the testing button is electrically connected with a micro-control unit, the micro-control unit is further connected with a display unit and a control end of a control relay, the control relay comprises the primary side grounding relay, the primary side capacitance relay, a primary side testing relay, a primary side capacitance wiring point and a primary side testing relay, corresponding testing types and items are selected through the testing button, the display unit displays currently selected testing items and testing states, and the micro-control unit enables the control relay to realize different switch combinations according to the selected testing types and items, so that various testing items are realized.
The high-voltage side of the control relay is provided with a relay fixed contact and a relay movable contact, an epoxy shielding plate is arranged between the relay fixed contact and the relay movable contact and is connected with an electromagnetic clutch of the shielding plate, when the relay fixed contact and the relay movable contact are not contacted, the micro-control unit controls the electromagnetic clutch of the shielding plate to act, so that the epoxy shielding plate is positioned between the relay fixed contact and the relay movable contact, the high voltage can be prevented from discharging to the other end through air, and when the movable contact and the movable contact are required to act and are sucked, the epoxy shielding plate is controlled to be separated.
In a preferred scheme, the control relay can adopt a vacuum relay.
The high-voltage part between the capacitor voltage transformer and the multifunctional testing device and between the capacitor voltage transformer and the dielectric loss tester is connected through a high-voltage shielding cable, one end of the high-voltage shielding cable, which is connected with a testing connector bolt provided with a clamp and the capacitor voltage transformer, is provided with an insulating ring belt with a buckle on a cable close to the clamp, the insulating ring belt fixes the high-voltage shielding cable and a porcelain bottle of the capacitor voltage transformer and fixes the high-voltage shielding cable and the porcelain bottle with the buckle, the gravity of the testing cable is completely born by the buckle type insulating ring belt, and the looseness of a wiring position caused by the dead weight of the.
The utility model provides a pair of CVT multinomial is situated between and is decreased test system realizes that capacitive voltage transformer's various are situated between through the combination of the internal relay on the multi-functional testing arrangement decreases the measurement and connects, and the jack wiring of combination formula is convenient for operate, raises the efficiency, saves time, has avoided the safe risk that multiple wiring mode conversion needs climbing many times to lead to.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is a schematic view showing the connection of the various parts of the present invention;
FIG. 2 is a schematic diagram of a primary side high voltage switch circuit of the multifunctional testing apparatus;
FIG. 3 is a schematic diagram of a secondary side switching circuit of the multifunctional testing device;
FIG. 4 is a schematic structural diagram of the multifunctional testing device;
FIG. 5 is a schematic view of a high voltage shielded cable;
FIG. 6 is a schematic diagram of a control relay structure;
FIG. 7 is a schematic view of a direct bonding method according to example C11.
In the figure: the multifunctional testing device comprises a multifunctional testing device 1, a dielectric loss tester 2, a capacitance voltage transformer 3, a primary side grounding relay 4, a primary side capacitance relay 5, a primary side testing relay 6, a secondary side testing relay 7, a primary side capacitance connection point 8, a secondary side winding connection point 9, a dielectric loss tester connection point 10, a primary side testing relay 11, a display unit 12, a micro control unit 13, a testing button 14, a control relay 15, an epoxy shielding plate 16, a relay static contact 17, a relay movable contact 18 and a shielding plate electromagnetic clutch 19.
Detailed Description
As shown in fig. 1, a CVT multi-term dielectric loss test system includes a multifunctional test device 1, where the multifunctional test device 1 is provided with a primary side capacitance connection point 8, a secondary side winding connection point 9, and a dielectric loss tester connection point 10, the primary side capacitance connection point 8 is electrically connected to a primary side capacitance on a capacitance voltage transformer 3, the secondary side winding connection point 9 is electrically connected to a secondary side coil on the capacitance voltage transformer 3, the dielectric loss tester connection point 10 is electrically connected to a test point on a dielectric loss tester 2, and each connection point is directly connected through a plug and a socket.
As shown in fig. 1 and 7, the primary side capacitance connection point 8 is electrically connected to one end of the primary side capacitance relay 5 in the testing device of the multifunctional testing device 1, the other end of the primary side capacitance relay 5 is connected to a high-voltage jack on the multifunctional testing device 1, and the high-voltage jack is used for being connected to a high-voltage output end of the dielectric loss measuring instrument.
As shown in fig. 1 and 7, the connection point between the primary-side capacitance relay 5 and the primary-side capacitance connection point 8 is further connected to one end of the primary-side test relay 6, the other end of the primary-side test relay 6 is electrically connected to one ends of the primary-side ground relay 4 and the primary-side test relay 11, the other end of the primary-side ground relay 4 is electrically connected to the ground, the other end of the primary-side test relay 11 is electrically connected to the test line jack, and only one of the primary-side ground relay 4 and the primary-side test relay 11 is turned on.
As shown in fig. 2 and 7, one end of the secondary winding connection point 9 is electrically connected to the secondary coil of the capacitor voltage transformer 3, the other end is electrically connected to one end of the secondary test relay 7, the other end of the secondary test relay 7 is electrically connected to the ground, and the secondary connection can realize three connection modes of short circuit grounding at one end of the secondary, suspension and short circuit at two ends of the secondary through the relay.
As shown in fig. 1, the multifunctional testing apparatus 1 is provided with a testing button 14, the testing button 14 is electrically connected to a micro-control unit 13, the micro-control unit 13 is further connected to a display unit 12 and a control terminal of a control relay 15, the control relay 15 includes the primary side grounding relay 4, the primary side capacitive relay 5, the primary side testing relay 6, the primary side capacitive connection point 8 and the primary side testing relay 11, a corresponding testing type and item are selected through the testing button 14, the display unit 12 displays a currently selected testing item and a testing state, and the micro-control unit 13 enables the control relay 15 to realize different switch combinations according to the selected testing type and item, thereby realizing various testing items.
As shown in fig. 6, the high-voltage side of the control relay 15 is provided with a relay fixed contact 17 and a relay movable contact 18, an epoxy shielding plate 16 is arranged between the relay fixed contact 17 and the relay movable contact 18, the epoxy shielding plate 16 is connected with a shielding plate electromagnetic clutch 19, when the relay fixed contact 17 is not contacted with the relay movable contact 18, the micro-control unit 13 controls the shielding plate electromagnetic clutch 19 to act, so that the epoxy shielding plate 16 is positioned between the relay fixed contact and the shielding plate electromagnetic clutch, the high-voltage discharge to the other end through air can be prevented, and when the movable contact and the movable contact are about to act and attract, the epoxy shielding plate 16.
In a preferred embodiment, the control relay 15 may be a vacuum relay.
As shown in fig. 5, the high voltage part between the capacitor voltage transformer 3 and the multifunctional testing device 1 and the dielectric loss tester 2 is connected by a high voltage shielding cable, one end of the high voltage shielding cable connected is provided with a clamp connected with a testing connector bolt of the capacitor voltage transformer 3, an insulating ring belt with a buckle is arranged on the cable close to the clamp, the high voltage shielding cable and a porcelain bottle of the capacitor voltage transformer 3 are fixed by the insulating ring belt and are fixed by the buckle, the gravity of the testing wire is completely born by the buckle type insulating ring belt, and the looseness of the wiring position caused by the dead weight of the cable can be prevented.
In a preferred scheme, the micro-control unit 13 can adopt a PLC or a single chip microcomputer, which are all commercially available products, such as 6ES 7214-1 AG40-0XB0 PLC manufactured by Siemens.
Fig. 7 shows a schematic diagram of a C11 positive connection method of a four-segment capacitor voltage transformer:
the high voltage output of the medium loss tester is connected with the high voltage jack of the primary side, K1 in the capacitor relay 5 of the primary side in the control relay 15 is attracted, K6 in the test relay 6 of the primary side is attracted, K11 of the test relay 11 of the primary side is attracted, and K12, K14, K16 and K18 in the test relay 7 of the secondary side are attracted.
Through the pull-in of K1 and K6, the C11 bus is connected with high voltage at the end, and the other end is connected with Cx to realize positive connection.
When the instrument is used, firstly, the multifunctional testing device 1 is connected with the capacitance voltage transformer 3 and the dielectric loss tester 2, all devices are electrified, the multifunctional testing device 1 is initialized, the control relay 15 is switched off to enable the relay switches to be located at safe positions, after initialization is completed, the power supply of the relay 15 is controlled to be switched on, testing items are selected through the testing button 14 of the multifunctional testing device 1, the starting button is pressed after determination, the devices are switched on, all relays form combination according to item contents, then the system carries out combination self-checking, whether the combination state is consistent with the preset state or not is checked, next step action cannot be carried out if the combination state is inconsistent, and dielectric loss detection is started after the self-checking is completed.
Claims (7)
1. A CVT multi-item dielectric loss test system is characterized in that: the device comprises a multifunctional testing device (1), wherein a primary side capacitor wiring point (8), a secondary side winding wiring point (9) and a dielectric loss tester wiring point (10) are arranged on the multifunctional testing device (1), the primary side capacitor wiring point (8) is electrically connected with a primary side capacitor on a capacitor voltage transformer (3), the secondary side winding wiring point (9) is electrically connected with a secondary side coil on the capacitor voltage transformer (3), and the dielectric loss tester wiring point (10) is electrically connected with a testing point on a dielectric loss tester (2).
2. The CVT multinomial dielectric loss test system according to claim 1, wherein: the primary side capacitor wiring point (8) is electrically connected with one end of a primary side capacitor relay (5) in the testing device of the multifunctional testing device (1), and the other end of the primary side capacitor relay (5) is connected with the high-voltage jack on the multifunctional testing device (1).
3. The CVT multinomial dielectric loss test system as recited in claim 2, wherein: the primary side capacitor relay (5) and the primary side capacitor connection point (8) are connected with one end of a primary side test relay (6), the other end of the primary side test relay (6) is electrically connected with one end of a primary side grounding relay (4) and one end of a primary side test relay (11), the other end of the primary side grounding relay (4) is electrically connected with a ground wire, and the other end of the primary side test relay (11) is electrically connected with a test wire jack.
4. The CVT multinomial dielectric loss test system according to claim 1, wherein: one end of the secondary side winding wiring point (9) is electrically connected with a secondary side coil of the capacitor voltage transformer (3), the other end of the secondary side winding wiring point is electrically connected with one end of the secondary side test relay (7), and the other end of the secondary side test relay (7) is electrically connected with a ground wire.
5. The CVT multi-item dielectric loss test system of claim 3, wherein: the multifunctional testing device (1) is provided with a testing button (14), the testing button (14) is electrically connected with a micro-control unit (13), the micro-control unit (13) is further connected with a display unit (12) and a control end of a control relay (15), and the control relay (15) comprises the primary side grounding relay (4), a primary side capacitance relay (5), a primary side testing relay (6), a primary side capacitance wiring point (8) and a primary side testing relay (11).
6. The CVT multi-item dielectric loss test system of claim 5, wherein: the high-voltage side of the control relay (15) is provided with a relay fixed contact (17) and a relay movable contact (18), an epoxy shielding plate (16) is arranged between the relay fixed contact and the relay movable contact, and the epoxy shielding plate (16) is connected with a shielding plate electromagnetic clutch (19).
7. The CVT multinomial dielectric loss test system according to claim 1, wherein: the capacitor voltage transformer (3) is connected with a high-voltage part between the multifunctional testing device (1) and the dielectric loss tester (2) through a high-voltage shielding cable, one end of the high-voltage shielding cable, which is connected with a testing joint bolt provided with a clamp and the capacitor voltage transformer (3), is connected with an insulating ring belt with a buckle on a cable close to the clamp, and the high-voltage shielding cable and a porcelain bottle of the capacitor voltage transformer (3) are fixed through the insulating ring belt and are fixed through the buckle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922283214.5U CN211505705U (en) | 2019-12-18 | 2019-12-18 | CVT (continuously variable transmission) multi-item dielectric loss test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922283214.5U CN211505705U (en) | 2019-12-18 | 2019-12-18 | CVT (continuously variable transmission) multi-item dielectric loss test system |
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| CN211505705U true CN211505705U (en) | 2020-09-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710873A (en) * | 2020-11-25 | 2021-04-27 | 深圳供电局有限公司 | Wiring device and testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710873A (en) * | 2020-11-25 | 2021-04-27 | 深圳供电局有限公司 | Wiring device and testing device |
| CN112710873B (en) * | 2020-11-25 | 2023-03-03 | 深圳供电局有限公司 | Wiring device and testing device |
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