CN203406161U - Hollow coil with closed magnetic circuit and resistance voltage divider combined electronic instrument transformer - Google Patents

Hollow coil with closed magnetic circuit and resistance voltage divider combined electronic instrument transformer Download PDF

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Publication number
CN203406161U
CN203406161U CN201320485899.1U CN201320485899U CN203406161U CN 203406161 U CN203406161 U CN 203406161U CN 201320485899 U CN201320485899 U CN 201320485899U CN 203406161 U CN203406161 U CN 203406161U
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CN
China
Prior art keywords
coil
voltage
magnetic circuit
connecting line
closed magnetic
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Expired - Fee Related
Application number
CN201320485899.1U
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Chinese (zh)
Inventor
唐晃
曹希余
杨福林
欧会建
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HENGYANG YIHU ELECTRICAL INSTRUMENT CO Ltd
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HENGYANG YIHU ELECTRICAL INSTRUMENT CO Ltd
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Priority to CN201320485899.1U priority Critical patent/CN203406161U/en
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Publication of CN203406161U publication Critical patent/CN203406161U/en
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Abstract

A hollow coil with closed magnetic circuit and resistance voltage divider combined electronic instrument transformer comprises a primary lead wire, a secondary coil, an aerial socket, a grounding bolt, a high-voltage shielding case, a high-voltage arm resistor, a low-voltage shielding case, a low-voltage arm resistor and an insulating casing and is characterized in that the secondary coil is a hollow coil with a closed magnetic circuit, and the hollow coil consists of printed coil boards, printing connecting boards, annular iron cores provided with air gaps equally cut in the peripheries and a shielding casing. The annular iron cores provided with the air gaps are embedded among the printed coil boards, passing magnetic flux is remarkably increased, signal intensity is large, the magnetic saturation problem exists scarcely, frequency bandwidth is large, a dynamic measurement range is wide, the signal to noise ratio is high, the stability is high, the anti-jamming capability is high, measurement and protection functions are simultaneously achieved only through one coil, and the electronic instrument transformer is small in size, light in weight and high in practicability. The instrument transformer performs voltage measurement by adopting a precise resistance voltage divider and is high in measurement accuracy.

Description

Electronic mutual inductor with closed magnetic circuit air core coil and resitstance voltage divider combination
Technical field
The utility model relates to a kind of electric power mutual-inductor, particularly a kind of electronic mutual inductor with closed magnetic circuit air core coil and resitstance voltage divider combination.
Background technology
At present, in the combination transformer using at 10~35KV electrical network, the measure portion of electronic current mutual inductor wherein, protection part is generally to adopt respectively low power current transformer, two coils of air core coil, if measure portion and protection part are adopted to a low power current transformer, owing to there being magnetic saturation problem, just need to increase core section long-pending, volume is large, cost is high, the secondary winding of air core coil is wherein on non magnetic skeleton, without ferroic material, there is measurement bandwidth, range of dynamic measurement is large, and there is not magnetic saturation problem, but very high to coiling technological requirement, temperature influence and electromagnetic interference are larger, output signal is little, signal to noise ratio is low.Common electronic type voltage transformer is generally resistance or capacitance-voltage-distributing type structure, in electric resistance partial pressure type structure, adopt precision resistance voltage divider as sensing element, simple in structure, accuracy of measurement is high, volume is little, lightweight, and capacitance in capacitance-voltage-distributing type structure is easily subject to the impact of ambient temperature and changes, thereby reduce, measures precision.
Summary of the invention
The purpose of this utility model is in order to overcome above-mentioned weak point, and provide a kind of simple in structure, volume is little, lightweight, signal to noise ratio is high, good stability, antijamming capability is strong, bandwidth, range of dynamic measurement is large, does not have the electronic mutual inductor with closed magnetic circuit air core coil and resitstance voltage divider combination of magnetic saturation problem.
The purpose of this utility model is achieved in that a kind of electronic mutual inductor with closed magnetic circuit air core coil and resitstance voltage divider combination, comprise wire one time, secondary coil, aviation socket, earth stud, high-tension shielding cover, high-voltage arm resistance, low pressure radome, low-voltage arm resistance, insulation shell, it is characterized in that secondary coil is by track girth sheets, printing connecting line plate, periphery decile cuts out the annular core of air gap, the band closed magnetic circuit air core coil that screening can forms, wherein annular core is placed on printing connecting line plate, in per pass air gap, vertically place respectively a slice track girth sheets, track girth sheets bottom is connected with printing connecting line plate, by the printing connecting line on printing connecting line plate, the printed coil on each track girth sheets is connected, and draw terminals, the coated screening can in neighboring.
The utility model is owing to adopting above architecture advances, secondary coil in current transformer is the air core coil with closed magnetic circuit, between track girth sheets, embed annular core, cause the magnetic flux by track girth sheets significantly to increase, thereby increased the signal strength signal intensity of air core coil, can effectively suppress extraneous leakage field and disturb, owing to there being air gap in iron core, have hardly magnetic saturation problem simultaneously.Both air core coil bandwidth, advantage that range of dynamic measurement is large had been kept; the feature such as simultaneously also have that low power current transformer signal to noise ratio is high, good stability, antijamming capability are strong, has realized the function of only measuring simultaneously and protecting with a coil, and volume is little; lightweight, practical.Voltage transformer adopts precision resistance voltage divider measuring voltage, and accuracy of measurement is high.
Accompanying drawing explanation
Fig. 1 is the utility model example structure schematic diagram;
Fig. 2 is secondary coil structural representation;
Fig. 3 is printed coil plate structure schematic diagram;
Fig. 4 is printing connecting line plate structure schematic diagram;
Fig. 5 is secondary coil radial cross-section;
Fig. 6 is secondary coil side sectional view.
Embodiment
Now illustrated embodiment is made detailed description to the utility model by reference to the accompanying drawings.
As shown in the figure, a kind of electronic mutual inductor with closed magnetic circuit air core coil and resitstance voltage divider combination, comprise wire 1 one time, secondary coil 2, insulation shell 3, fairlead 4, discharge tube 5, aviation socket 6, earth stud 7, high-tension shielding cover 8, high-voltage arm resistance 9, low pressure radome 10, low-voltage arm resistance 11, wherein a wire 1 passes from the center of secondary coil 2, the secondary wiring of secondary coil 2 is connected with aviation socket 6 through fairlead 4 by going between, high-voltage arm resistance 9 one end connect high-tension shielding cover 8, high-tension shielding cover 8 is connected with a wire 1, high-voltage arm resistance 9 other ends are connected with low-voltage arm resistance 11 one end, low-voltage arm resistance 11 other ends are connected with low pressure radome 10, low pressure radome 10 is connected with earth stud 7, low-voltage arm resistance 11 two ends are connected with aviation socket 6 with after discharge tube 5 parallel connections again, by epoxy resin, each is zero, parts pour into an integrated entity, form insulation shell 3, aviation socket 6 is arranged on insulation shell 3 one sides.Secondary coil 2 is by track girth sheets 12, printing connecting line plate 13, periphery decile cuts out the annular core 16 of four road air gaps 15, screening can 14 forms, annular core 16 is placed on printing connecting line plate 13, in per pass air gap 15, vertically place respectively a slice track girth sheets 12, by being fixedly connected with in corresponding installing hole on the projection insertion printing connecting line plate 13 of track girth sheets 12 bottoms, in the one side of track girth sheets 12, multiturn coil is set, another side is laid output connecting line, coil connecting line is set above printing connecting line plate 13, on bottom surface, lay output connecting line, by the printing connecting line on printing connecting line plate 13, the printed coil on each track girth sheets 12 is connected, and draw terminals, the coated aluminium alloy screening can 14 in neighboring.

Claims (1)

1. the electronic mutual inductor with the combination of closed magnetic circuit air core coil and resitstance voltage divider, comprise a wire (1), secondary coil (2), aviation socket (6), earth stud (7), high-tension shielding cover (8), high-voltage arm resistance (9), low pressure radome (10), low-voltage arm resistance (11), insulation shell (3), it is characterized in that secondary coil (2) is by track girth sheets (12), printing connecting line plate (13), periphery decile cuts out the annular core (16) of air gap (15), the band closed magnetic circuit air core coil that screening can (14) forms, wherein annular core (16) is placed on printing connecting line plate (13), in per pass air gap (15), vertically place respectively a slice track girth sheets (12), track girth sheets (12) bottom is connected with printing connecting line plate (13), by the printing connecting line on printing connecting line plate (13), the printed coil on each track girth sheets (12) is connected, and draw terminals, the coated screening can in neighboring (14).
CN201320485899.1U 2013-08-09 2013-08-09 Hollow coil with closed magnetic circuit and resistance voltage divider combined electronic instrument transformer Expired - Fee Related CN203406161U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320485899.1U CN203406161U (en) 2013-08-09 2013-08-09 Hollow coil with closed magnetic circuit and resistance voltage divider combined electronic instrument transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320485899.1U CN203406161U (en) 2013-08-09 2013-08-09 Hollow coil with closed magnetic circuit and resistance voltage divider combined electronic instrument transformer

Publications (1)

Publication Number Publication Date
CN203406161U true CN203406161U (en) 2014-01-22

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CN (1) CN203406161U (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104345206A (en) * 2014-11-14 2015-02-11 国家电网公司 Voltage live-line measurement device capable of preventing fault arcs
CN104360135A (en) * 2014-11-14 2015-02-18 国家电网公司 Live line voltage measurement device
CN104360161A (en) * 2014-11-14 2015-02-18 国家电网公司 Contact resistance live line measurement device
CN104360133A (en) * 2014-11-14 2015-02-18 国家电网公司 Contact resistance voltage measuring device
CN104360134A (en) * 2014-11-14 2015-02-18 国家电网公司 Live-line voltage measurement device capable of preventing transient overvoltage
CN104360162A (en) * 2014-11-14 2015-02-18 国家电网公司 Live line measurement device for contact resistance of high voltage loop
CN104360160A (en) * 2014-11-14 2015-02-18 国家电网公司 High-voltage loop contact resistor live line measurement device
CN104360132A (en) * 2014-11-14 2015-02-18 国家电网公司 Contact resistance live line measurement device
CN104360163A (en) * 2014-11-14 2015-02-18 国家电网公司 Contact resistor live-line measurement device capable of preventing fault arcs
CN111679117A (en) * 2020-06-09 2020-09-18 国网山东省电力公司检修公司 Broadband 35kv voltage measuring device and method
CN113419197A (en) * 2021-06-02 2021-09-21 华中科技大学 Voltage-reducing magnetic flux ring device and magnetic flux induction signal measuring method

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104345206A (en) * 2014-11-14 2015-02-11 国家电网公司 Voltage live-line measurement device capable of preventing fault arcs
CN104360135A (en) * 2014-11-14 2015-02-18 国家电网公司 Live line voltage measurement device
CN104360161A (en) * 2014-11-14 2015-02-18 国家电网公司 Contact resistance live line measurement device
CN104360133A (en) * 2014-11-14 2015-02-18 国家电网公司 Contact resistance voltage measuring device
CN104360134A (en) * 2014-11-14 2015-02-18 国家电网公司 Live-line voltage measurement device capable of preventing transient overvoltage
CN104360162A (en) * 2014-11-14 2015-02-18 国家电网公司 Live line measurement device for contact resistance of high voltage loop
CN104360160A (en) * 2014-11-14 2015-02-18 国家电网公司 High-voltage loop contact resistor live line measurement device
CN104360132A (en) * 2014-11-14 2015-02-18 国家电网公司 Contact resistance live line measurement device
CN104360163A (en) * 2014-11-14 2015-02-18 国家电网公司 Contact resistor live-line measurement device capable of preventing fault arcs
CN111679117A (en) * 2020-06-09 2020-09-18 国网山东省电力公司检修公司 Broadband 35kv voltage measuring device and method
CN113419197A (en) * 2021-06-02 2021-09-21 华中科技大学 Voltage-reducing magnetic flux ring device and magnetic flux induction signal measuring method
CN113419197B (en) * 2021-06-02 2022-02-15 华中科技大学 Voltage-reducing magnetic flux ring device and magnetic flux induction signal measuring method

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140122

Termination date: 20180809

CF01 Termination of patent right due to non-payment of annual fee