CN203225140U - Compact 10kV voltage monitoring insulator - Google Patents

Compact 10kV voltage monitoring insulator Download PDF

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Publication number
CN203225140U
CN203225140U CN 201320250233 CN201320250233U CN203225140U CN 203225140 U CN203225140 U CN 203225140U CN 201320250233 CN201320250233 CN 201320250233 CN 201320250233 U CN201320250233 U CN 201320250233U CN 203225140 U CN203225140 U CN 203225140U
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China
Prior art keywords
voltage
voltage arm
compact
surface metal
metal flange
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CN 201320250233
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Chinese (zh)
Inventor
姚飞
艾晓宇
李军科
谭润泽
孙剑
王超
楼颂森
吴祖强
王勇平
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BEIJING HUATIAN ELECTROMECHANICAL INSTITUTE Co Ltd
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BEIJING HUATIAN ELECTROMECHANICAL INSTITUTE Co Ltd
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Abstract

A compact 10kV voltage monitoring insulator comprises a high voltage insulator, a high voltage arm cable lead, a low voltage arm measurement box and a measurement cable, the high voltage insulator is cylindrical, is internally provided with a high voltage arm capacitor in a fixed manner, and the upper and lower surfaces are provided with an upper surface metal flange and a lower surface metal flange respectively. The upper surface metal flange is connected with the upper end of the high voltage arm capacitor, the lower end of the high voltage arm capacitor is connected with the lower surface metal flange, the lower surface metal flange is connected with the high voltage arm cable lead, the high voltage arm cable lead is connected with an input terminal of the low voltage arm measurement box, and an output terminal of the lower voltage arm measurement box is connected with the measurement cable. The voltage monitoring insulator has the characteristics of being small in size and high in precision, and not being affected by ambient temperature and the like, and can replace a supporting insulator in a high voltage switch cabinet filled with sulfur hexafluoride gas in an installation position without changing the internal structure of the switch cabinet, thereby satisfying the requirement of the sulfur hexafluoride gas-filled switch cabinet for the spatial size of a voltage monitoring device.

Description

Compact 10kV voltage monitoring insulator
Technical field
The utility model relates to the voltage transformer technical field, is specifically related to compact 10kV voltage monitoring insulator.
Background technology
Electric power mutual-inductor is indispensable connection device once and between the secondary electric loop in the electric power system.Be mainly used in the measurement of voltage parameter; for metering, protection and the monitoring unit of system provides signal; realize once, the electrical isolation of electrical secondary system; simultaneously also can carry out voltage transformation, the high-voltage variable of primary side be changed into the low-voltage of work such as being suitable for protective relaying device and electrical measuring instrument.
The voltage transformer that uses in the electric power system at present mainly contains induction and capacitance-voltage-distributing type.Along with the increase of electric power system capacity, the raising of electric pressure, the shortcoming of traditional electromagnetic potential transformer is more and more outstanding.Press instrument transformer to compare with magnetoelectricity, capacitance-voltage-distributing type has advantage as follows: no saturated, and linearity; Volume is little, and is in light weight; Can not cause ferro resonance.The capacitance-voltage-distributing type instrument transformer mainly is used in high pressure and superhigh pressure field at present.The utility model mainly is to be used in 10kV distribution field, is used for replacing electromagnetic potential transformer.
The utility model content
The technical problems to be solved in the utility model provides compact 10kV voltage monitoring insulator, purpose is to overcome the technical disadvantages of existing instrument transformer, a kind of voltage monitor that can replace electromagnetic transformer and supporting insulator is provided, need not change the internal structure of switch cubicle, voltage transformer and supporting insulator in the high-tension switch cabinet that fills sulfur hexafluoride gas can be replaced, electrical insulative property and mechanical load characteristic can be satisfied simultaneously.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
Compact 10kV voltage monitoring insulator, comprise high-tension insulator, the high-voltage arm cable tail, low-voltage arm measuring box and measurement cable, described high-tension insulator is cylindrical, described high-tension insulator inside is installed with high-voltage arm electric capacity, the upper surface of described high-tension insulator and lower surface are respectively equipped with upper surface metal flange and lower surface metal flange, be provided with low-voltage arm electric capacity in the described low-voltage arm measuring box, described low-voltage arm measuring box has input terminal and lead-out terminal, described upper surface metal flange is connected with the upper end of high-voltage arm electric capacity, the lower end of described high-voltage arm electric capacity is connected with the lower surface metal flange, described lower surface metal flange is connected with the high-voltage arm cable tail, described high-voltage arm cable tail is connected with the input terminal of low-voltage arm measuring box, and the lead-out terminal of described low-voltage arm measuring box is connected with the measurement cable.
Preferably, the cylindrical sides of described high-tension insulator is provided with cluster parachute.
Preferably, have several metal threaded holes on described upper surface metal flange and the lower surface metal flange.
Preferably, also be provided with protection device in the described low-voltage arm measuring box.
Preferably, described measurement cable is shielded type cable.
Preferably, described measurement cable output voltage is 3.25V.
Preferably, described voltage insulation is epoxide resin material.
Preferably, described high-voltage arm cable tail is ac voltage withstanding 50kV high-tension cable.
Preferably, described input terminal is 75 Ω BNC connectors.
Preferably, described lead-out terminal is 50 Ω BNC connectors.
The utility model is owing to adopted above technical scheme, the voltage monitoring insulator has characteristics such as volume is little, precision is high, not influenced by ambient temperature, the installation site can replace voltage transformer and the supporting insulator in the high-tension switch cabinet that fills sulfur hexafluoride gas, need not change the internal structure of switch cubicle, solve the requirement of sulphur hexafluoride inflating switch cabinet for voltage monitor bulk.The measuring-signal of measuring cable output can directly connect digital watch or microcomputer protecting device, is convenient to insert intelligent grid.
Below in conjunction with accompanying drawing compact 10kV voltage monitoring insulator of the present utility model is described further.
Description of drawings
Fig. 1 is the main apparent direction structural representation of connection of the utility model compact 10kV voltage monitoring insulator;
Fig. 2 overlooks the direction structure schematic diagram for the connection of the utility model compact 10kV voltage monitoring insulator.
Each mark is as follows among the figure: 1 high-tension insulator, and 2 high-voltage arm cable tails, 3 low-voltage arm measuring boxes, 4 measure cable, 5 upper surface metal flanges, 6 lower surface metal flanges, 7 high-voltage arm electric capacity, 8 cluster parachutes, 9 metal threaded holes.10 low-voltage arm electric capacity, 11 protection devices, 12 input terminals, 13 lead-out terminals.
Embodiment
As depicted in figs. 1 and 2, compact 10kV voltage monitoring insulator, comprise high-tension insulator 1, high-voltage arm cable tail 2, low-voltage arm measuring box 3 and measure cable 4, described high-tension insulator 1 is cylindrical, described voltage insulation 1 is epoxide resin material, and the cylindrical sides of described high-tension insulator 1 is provided with cluster parachute 8.Described high-tension insulator 1 inside is installed with high-voltage arm electric capacity 7, the upper surface of described high-tension insulator 1 and lower surface are respectively equipped with upper surface metal flange 5 and lower surface metal flange 6, have several metal threaded holes 9 on described upper surface metal flange 5 and the lower surface metal flange 6.
Be provided with low-voltage arm electric capacity 10 in the described low-voltage arm measuring box 3, described low-voltage arm measuring box 3 has input terminal 12 and lead-out terminal 13, also is provided with protection device 11 in the described low-voltage arm measuring box 3.
Described upper surface metal flange 5 is connected with the upper end of high-voltage arm electric capacity 7, the lower end of high-voltage arm electric capacity 7 is connected with lower surface metal flange 6, lower surface metal flange 6 is connected with high-voltage arm cable tail 2, high-voltage arm cable tail 2 is connected with the input terminal 12 of low-voltage arm measuring box 3, and the lead-out terminal 13 of low-voltage arm measuring box 3 is connected with measurement cable 4.
Described measurement cable 4 is shielded type cable.Described measurement cable 4 output voltages are 3.25V.
Described high-voltage arm cable tail 2 is ac voltage withstanding 50kV high-tension cable.Described input terminal 12 is 75 Ω BNC connectors.Described lead-out terminal 13 is 50 Ω BNC connectors.
High-tension insulator 1 adopts epoxy resin embedding adhesive one moulding by casting, and high-tension insulator 1 cylindrical sides is provided with cluster parachute 8 structures, can increase the surface creepage distance.Have several metal threaded holes 9 on upper surface metal flange 5 and the lower surface metal flange 6, be convenient to and the copper bar of various switch cubicles between realize fixing, upper surface metal flange 5 connects the copper bar high-pressure side of switch cubicle, and lower surface metal flange 6 connects the ground connection side of switch cubicle.The upper end of high-voltage arm electric capacity 7 connects surface metal flange 5, and the lower end of high-voltage arm electric capacity 7 links to each other with high-voltage arm cable tail 2, and high-voltage arm cable tail 2 adopts the insulated wire of high insulation resistance, and withstand voltage reaching exchanges 50kV.
Low-voltage arm measuring box 3 adopts metal shell; be made as input terminal 12 and lead-out terminal 13 respectively; low-voltage arm measuring box 3 inside are provided with low-voltage arm electric capacity 10 and protection device 11; in order to prevent wrong; input terminal 12 adopts different interfaces with lead-out terminal 13; input terminal 12 is 75 Ω BNC connectors, and lead-out terminal 13 is 50 Ω BNC connectors.High pressure when protection device 11 can prevent low-voltage arm electric capacity 10 and lead-in wire broken string does not enter to be measured in the cable 4, guarantees the safety of personnel and equipment.
Measure cable 4 and adopt shielded type cable, very strong interference free performance is arranged, be output as the 3.25V ac voltage signal, can directly link to each other with digital instrument or the microcomputer protecting device of secondary, certainty of measurement can reach 0.5%.The utility model has passed through the test of 75kV lightning impulse voltage in addition, test is put less than 3PC in 42kV industrial frequency withstand voltage 1 minute test, 10kV power frequency office.Another characteristics of this utility model are that volume is little, and capacitor voltage divider in the past all can not be accomplished so little size, and this utility model compact conformation can be used in the sulfur hexafluoride gas cabinet of compact.This voltage monitoring insulator can be used on-40 degrees centigrade in+70 degrees centigrade temperature environment, and rate of temperature change is controlled in 1%.
Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection range of the utility model claims.

Claims (10)

1. compact 10kV voltage monitoring insulator, comprise high-tension insulator (1), high-voltage arm cable tail (2), low-voltage arm measuring box (3) and measurement cable (4), it is characterized in that: described high-tension insulator (1) is for cylindrical, described high-tension insulator (1) inside is installed with high-voltage arm electric capacity (7), the upper surface of described high-tension insulator (1) and lower surface are respectively equipped with upper surface metal flange (5) and lower surface metal flange (6), be provided with low-voltage arm electric capacity (10) in the described low-voltage arm measuring box (3), described low-voltage arm measuring box (3) has input terminal (12) and lead-out terminal (13), described upper surface metal flange (5) is connected with the upper end of high-voltage arm electric capacity (7), the lower end of described high-voltage arm electric capacity (7) is connected with lower surface metal flange (6), described lower surface metal flange (6) is connected with high-voltage arm cable tail (2), described high-voltage arm cable tail (2) is connected with the input terminal (12) of low-voltage arm measuring box (3), and the lead-out terminal (13) of described low-voltage arm measuring box (3) is connected with measurement cable (4).
2. compact 10kV voltage monitoring insulator according to claim 1, it is characterized in that: the cylindrical sides of described high-tension insulator (1) is provided with cluster parachute (8).
3. compact 10kV voltage monitoring insulator according to claim 1 is characterized in that: have several metal threaded holes (9) on described upper surface metal flange (5) and the lower surface metal flange (6).
4. compact 10kV voltage monitoring insulator according to claim 1 is characterized in that: also be provided with protection device (11) in the described low-voltage arm measuring box (3).
5. compact 10kV voltage monitoring insulator according to claim 1, it is characterized in that: described measurement cable (4) is shielded type cable.
6. compact 10kV voltage monitoring insulator according to claim 1, it is characterized in that: described measurement cable (4) output voltage is 3.25V.
7. compact 10kV voltage monitoring insulator according to claim 1, it is characterized in that: described voltage insulation (1) is epoxide resin material.
8. compact 10kV voltage monitoring insulator according to claim 1, it is characterized in that: described high-voltage arm cable tail (2) is ac voltage withstanding 50kV high-tension cable.
9. compact 10kV voltage monitoring insulator according to claim 1, it is characterized in that: described input terminal (12) is 75 Ω BNC connectors.
10. compact 10kV voltage monitoring insulator according to claim 1, it is characterized in that: described lead-out terminal (13) is 50 Ω BNC connectors.
CN 201320250233 2013-05-09 2013-05-09 Compact 10kV voltage monitoring insulator Active CN203225140U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320250233 CN203225140U (en) 2013-05-09 2013-05-09 Compact 10kV voltage monitoring insulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320250233 CN203225140U (en) 2013-05-09 2013-05-09 Compact 10kV voltage monitoring insulator

Publications (1)

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CN203225140U true CN203225140U (en) 2013-10-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103236329A (en) * 2013-05-09 2013-08-07 北京华天机电研究所有限公司 Compact type 10kv voltage monitoring insulator
CN110082652A (en) * 2019-04-29 2019-08-02 电力规划总院有限公司 Choosing method, the device of arcing horn and insulator chain in overhead transmission line

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103236329A (en) * 2013-05-09 2013-08-07 北京华天机电研究所有限公司 Compact type 10kv voltage monitoring insulator
CN110082652A (en) * 2019-04-29 2019-08-02 电力规划总院有限公司 Choosing method, the device of arcing horn and insulator chain in overhead transmission line
CN110082652B (en) * 2019-04-29 2021-09-03 电力规划总院有限公司 Selection method and device for arcing horn and insulator string in overhead transmission line

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