CN107942115B - Capacitance voltage-dividing type high-voltage measuring device capable of adjusting voltage-dividing ratio - Google Patents
Capacitance voltage-dividing type high-voltage measuring device capable of adjusting voltage-dividing ratio Download PDFInfo
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- CN107942115B CN107942115B CN201710989108.1A CN201710989108A CN107942115B CN 107942115 B CN107942115 B CN 107942115B CN 201710989108 A CN201710989108 A CN 201710989108A CN 107942115 B CN107942115 B CN 107942115B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
- G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a capacitance voltage division type high-voltage measuring device capable of adjusting voltage division ratio, which solves the problem that secondary output voltage is not adjustable when high-voltage measurement is carried out in the existing device. The device comprises a group of series high-voltage capacitor banks (2), a voltage measuring instrument and an inverted metal barrel seat (6), wherein an insulating cylinder (8) is embedded in an inner cavity of the inverted metal barrel seat (6), a cylindrical metal ring (9) is embedded in a central hole of an insulating annular supporting table (17), a metal selector rotating shaft (16) is movably arranged in a circle of spring contact finger (14), a transformation ratio adjusting insulating handle (4) is connected to the lower end of the metal selector rotating shaft (16), low-voltage capacitors (11) with different capacities are arranged on the inner cavity wall of the insulating cylinder (8) above the insulating annular supporting table (17) at equal intervals in an arc manner, and the metal selector rotating shaft (16) is rotated to realize switching access of the low-voltage capacitors (11) with different capacities and achieve the purpose of changing the voltage division ratio.
Description
Technical Field
The invention relates to a high-voltage measuring device in a power transmission and transformation system, in particular to a measuring device which converts high voltage into low voltage and then is connected into an instrument for measurement in a protection device for power equipment handover test or voltage monitoring of a power system.
Background
The protection device for the handover test or voltage monitoring of the power equipment in the power system needs to convert high voltage into low voltage by using a high voltage measuring device and then is connected to a measuring instrument. At present, for measuring alternating current high voltage, a capacitive voltage divider is mainly used for measuring the high voltage, but the transformation ratio of the existing voltage divider is fixed, the secondary output voltage cannot be adjusted, only a fixed measuring instrument can be accessed, the application range is limited, and the field test is inconvenient.
Disclosure of Invention
The invention provides a capacitance voltage division type high-voltage measuring device capable of adjusting voltage division ratio, which solves the technical problem that secondary output voltage is not adjustable when high-voltage measurement is carried out in the existing device.
The invention solves the technical problems by the following technical scheme:
A capacitance voltage-dividing type high-voltage measuring device with adjustable voltage-dividing ratio comprises a group of series high-voltage capacitor groups, a voltage measuring instrument and a back-off metal barrel seat, wherein an insulating barrel is embedded in an inner cavity of the back-off metal barrel seat, an insulating annular supporting table is fixedly arranged in the middle of the inner cavity of the insulating barrel, a cylindrical metal ring is embedded in a central hole of the insulating annular supporting table, a circle of spring contact fingers are arranged on the side wall of the inner cavity of the central hole of the cylindrical metal ring, a metal selector rotating shaft is movably arranged in the circle of spring contact fingers, a ratio-changing adjusting insulating handle is connected at the lower end of the metal selector rotating shaft, low-voltage capacitors with different capacities are arranged on the inner cavity wall of the insulating barrel above the insulating annular supporting table at equal intervals in radian, a metal oscillating bar is connected at the upper end of the metal selector rotating shaft, and an elastic contact tongue, elastic touch tongue and low voltage capacitor's inboard arc polar plate touches and connects together, the outside polar plate of low voltage capacitor links together through the staving of pressing electric capacity grounding piece and back-off metal barrel seat, it passes the hole to be provided with the cable on the barrel head of back-off metal barrel seat, low pressure connecting wire passes the cable and links together with cylindrical becket after passing the hole, the other end of low pressure connecting wire links together with the lower polar plate of a set of series connection high voltage capacitor group, last polar plate at a set of series connection high voltage capacitor group is connected with high voltage lead wire, be connected with the measuring instrument connecting wire on cylindrical becket.
A transformation ratio indicator is arranged on the transformation ratio adjusting insulating handle, and a grounding bolt is arranged on the barrel body of the back-off metal barrel seat.
The invention arranges four low-voltage capacitors with different capacitance in the insulating support, one end of the low-voltage capacitor selector is embedded and fixed on the selector rotating shaft, and the other end of the low-voltage capacitor selector is contacted with the head end of the low-voltage capacitor by the clamping groove. The rotating shaft of the selector is rotated by adjusting the insulating handle through the transformation ratio, so that the rotation of the low-voltage capacitor selector is realized, the switching access of low-voltage capacitors with different capacitance is realized, the purpose of changing the voltage division ratio is achieved, the secondary voltage output is adjustable, and different measuring instruments and protection devices can be accessed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 line 3 a 3- 3 a 3 in 3 fig. 3 1 3. 3
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
A capacitance voltage division type high voltage measuring device with adjustable voltage division ratio comprises a group of series high voltage capacitor group 2, a voltage measuring instrument and an inverted metal barrel seat 6, an insulating barrel 8 is embedded in the inner cavity of the inverted metal barrel seat 6, an insulating annular support table 17 is fixedly arranged in the middle of the inner cavity of the insulating barrel 8, a cylindrical metal ring 9 is embedded in the central hole of the insulating annular support table 17, a circle of spring contact fingers 14 are arranged on the side wall of the inner cavity of the central hole of the cylindrical metal ring 9, a metal selector rotating shaft 16 is movably arranged in the circle of spring contact fingers 14, a ratio-changing adjusting insulating handle 4 is connected to the lower end of the metal selector rotating shaft 16, low voltage capacitors 11 with different capacities are arranged on the inner cavity wall of the insulating barrel 8 above the insulating annular support table 17 at equal intervals in radian, a metal swing rod 15 is connected to the upper end of the metal selector rotating shaft 16, fixed being provided with elasticity on the other end of metal pendulum rod 15 touches tongue 13, elasticity touches tongue 13 and low voltage capacitor 11's inboard arc polar plate to touch and connects together, low voltage capacitor 11's outside polar plate links together through pressing electric capacity grounding block 10 and the staving of back-off metal barrel seat 6, it passes hole 18 to be provided with the cable on the barrel head of back-off metal barrel seat 6, low pressure connecting wire 3 passes cable and links together with cylindrical becket metal ring 9 after passing hole 18, low pressure connecting wire 3's the other end links together with the lower polar plate of a set of series connection high voltage capacitor group 2, the last polar plate of a set of series connection high voltage capacitor group 2 is connected with high voltage lead 1, be connected with measuring instrument connecting wire 7 on cylindrical becket 9, link together through measuring instrument connecting wire 7 and measuring instrument.
a transformation ratio indicator 5 is arranged on the transformation ratio adjusting insulating handle 4, and a grounding bolt 12 is arranged on the barrel body of the inverted metal barrel seat 6, so that the grounding wire can be conveniently connected.
The high-voltage lead 1 is connected with a high voltage to be measured, and is connected with a cylindrical metal ring 9 through a low-voltage capacitor connecting wire 3 with an insulating sleeve at the tail end of a high-voltage capacitor after passing through a group of series high-voltage capacitor groups 2, two rings of spring contact fingers 14 are arranged on the side wall of the inner cavity of the central hole of the cylindrical metal ring 9, the spring contact fingers 14 are pressed on a metal selector rotating shaft 16 by elasticity, good contact is guaranteed, and the metal selector rotating shaft 16 rotates flexibly. One end of the metal swing rod 15 is embedded and fixed at the upper end of the metal selector rotating shaft 16, and the other end of the metal swing rod 15 is fixedly provided with an elastic contact tongue 13. The insulating handle 4 is adjusted through the transformation ratio, so that the metal selector rotating shaft 16 rotates, the switching access of the low-voltage capacitors 11 with different capacitance is realized, and the purpose of changing the voltage division ratio is achieved. The upper part of the transformation ratio adjusting insulated handle 4 is provided with a transformation ratio indicator 5 which can indicate the currently selected partial pressure ratio.
Low-voltage capacitors 11 with different capacities are arranged on the inner cavity wall of the insulating cylinder 8 above the insulating annular support table 17 at equal intervals in a radian manner, and the number of the low-voltage capacitors 11 can be selected and determined according to the types of measuring instruments; the grounding bolt 12 is arranged on the barrel body of the inverted metal barrel seat 6, and the grounding bolt 12 is grounded in measurement. The cylindrical metal ring 9 is led out of a measuring instrument connecting wire 7, the measuring instrument connecting wire 7 is a wire with an insulating sheath, the voltage between a core wire of the measuring instrument connecting wire and the ground is output secondary low voltage, and the measuring instrument connecting wire can be connected into different measuring devices or test loops.
Claims (2)
1. A capacitance voltage division type high voltage measuring device with adjustable voltage division ratio comprises a group of series high voltage capacitor banks (2), a voltage measuring instrument and an inverted metal barrel seat (6), and is characterized in that an insulating cylinder (8) is embedded in the inner cavity of the inverted metal barrel seat (6), an insulating annular supporting table (17) is fixedly arranged in the middle of the inner cavity of the insulating cylinder (8), a cylindrical metal ring (9) is embedded in the central hole of the insulating annular supporting table (17), a circle of spring contact fingers (14) are arranged on the side wall of the inner cavity of the central hole of the cylindrical metal ring (9), a metal selector rotating shaft (16) is movably arranged in the circle of spring contact fingers (14), a transformation ratio adjusting insulating handle (4) is connected to the lower end of the metal selector rotating shaft (16), and on the inner cavity wall of the insulating cylinder (8) above the insulating annular supporting table (17), low-voltage capacitors (11) with different capacities are arranged at equal intervals in a radian manner, the upper end of a metal selector rotating shaft (16) is connected with a metal swing rod (15), the other end of the metal swing rod (15) is fixedly provided with an elastic touch tongue (13), the elastic touch tongue (13) is in contact connection with an inner side arc-shaped polar plate of the low-voltage capacitor (11), an outer side polar plate of the low-voltage capacitor (11) is connected with a barrel body of an inverted metal barrel seat (6) through a pressed capacitor grounding block (10), a cable through hole (18) is arranged at the barrel bottom of the inverted metal barrel seat (6), a low-voltage connecting lead (3) is connected with a cylindrical metal ring (9) after penetrating out from the cable through hole (18), the other end of the low-voltage connecting lead (3) is connected with a lower polar plate of a group of series high-voltage capacitor groups (2), an upper polar plate of the group of series high-voltage capacitor groups (, the cylindrical metal ring (9) is connected with a measuring instrument connecting wire (7).
2. The capacitive voltage division type high voltage measuring device with the adjustable voltage division ratio as claimed in claim 1, wherein a ratio indicator (5) is provided on the ratio-adjustable insulated handle (4), and a grounding bolt (12) is provided on the barrel body of the inverted metal barrel base (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710989108.1A CN107942115B (en) | 2017-10-22 | 2017-10-22 | Capacitance voltage-dividing type high-voltage measuring device capable of adjusting voltage-dividing ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710989108.1A CN107942115B (en) | 2017-10-22 | 2017-10-22 | Capacitance voltage-dividing type high-voltage measuring device capable of adjusting voltage-dividing ratio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107942115A CN107942115A (en) | 2018-04-20 |
| CN107942115B true CN107942115B (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710989108.1A Active CN107942115B (en) | 2017-10-22 | 2017-10-22 | Capacitance voltage-dividing type high-voltage measuring device capable of adjusting voltage-dividing ratio |
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| Country | Link |
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| CN (1) | CN107942115B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615502A (en) * | 2009-05-07 | 2009-12-30 | 国网电力科学研究院 | A kind of double layered bell jar type voltage and current sensor |
| KR20100046310A (en) * | 2008-10-27 | 2010-05-07 | 한국표준과학연구원 | Evaluating method and system of high voltage divider |
| CN201853571U (en) * | 2010-10-22 | 2011-06-01 | 北京浩霆光电技术有限责任公司 | Voltage transformer based on capacitance-resistance voltage division principle |
| WO2014076210A1 (en) * | 2012-11-16 | 2014-05-22 | Alstom Technology Ltd | Very high voltage dc line voltage sensor |
| CN205539343U (en) * | 2016-04-14 | 2016-08-31 | 华北电力大学 | Integration probe is put in office based on electric capacity divides platen press VFTO measuring transducer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2671190B1 (en) * | 1990-12-26 | 1993-03-19 | Merlin Gerin | REFERENCE VOLTAGE MEASUREMENT BRIDGE FOR DEVICE FOR MONITORING AND MEASURING THE INSULATION OF A CONTINUOUS VOLTAGE ELECTRICAL NETWORK. |
| CN203838215U (en) * | 2013-11-30 | 2014-09-17 | 芜湖国睿兆伏电子有限公司 | Capacitive voltage divider capable of adjusting voltage division ratio |
| CN204256014U (en) * | 2014-09-26 | 2015-04-08 | 国家电网公司 | A kind of voltage divider and bleeder circuit thereof |
-
2017
- 2017-10-22 CN CN201710989108.1A patent/CN107942115B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100046310A (en) * | 2008-10-27 | 2010-05-07 | 한국표준과학연구원 | Evaluating method and system of high voltage divider |
| CN101615502A (en) * | 2009-05-07 | 2009-12-30 | 国网电力科学研究院 | A kind of double layered bell jar type voltage and current sensor |
| CN201853571U (en) * | 2010-10-22 | 2011-06-01 | 北京浩霆光电技术有限责任公司 | Voltage transformer based on capacitance-resistance voltage division principle |
| WO2014076210A1 (en) * | 2012-11-16 | 2014-05-22 | Alstom Technology Ltd | Very high voltage dc line voltage sensor |
| CN205539343U (en) * | 2016-04-14 | 2016-08-31 | 华北电力大学 | Integration probe is put in office based on electric capacity divides platen press VFTO measuring transducer |
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| Publication number | Publication date |
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| CN107942115A (en) | 2018-04-20 |
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