CN103050264A - Multiple-transformation-ratio selectable outdoor open-type current transformer - Google Patents
Multiple-transformation-ratio selectable outdoor open-type current transformer Download PDFInfo
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- CN103050264A CN103050264A CN2012105361420A CN201210536142A CN103050264A CN 103050264 A CN103050264 A CN 103050264A CN 2012105361420 A CN2012105361420 A CN 2012105361420A CN 201210536142 A CN201210536142 A CN 201210536142A CN 103050264 A CN103050264 A CN 103050264A
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- iron core
- siding ring
- end iron
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Abstract
The invention discloses a multiple-transformation-ratio selectable outdoor open-type current transformer which comprises an upper half portion, an upper end iron core, a lower half portion, a lower end iron core, a secondary lateral coil framework and secondary lateral coils. The upper end iron core is located inside the upper half portion, the contact surface of the upper half portion and the lower half portion is provided with a semi-circular hole for fixing a power transmission line, and the upper half portion is made of an insulating material. The secondary lateral coil framework surrounds on the lower end iron core, N secondary lateral coils are wound on the secondary lateral coil framework, each secondary lateral coil is provided with two terminals for external connection, the lower end iron core is located inside the lower half portion, the contact surface of the lower half portion and the upper half portion is provided with a semi-circular hole for fixing the power transmission line, and the upper half portion is made of an insulating material. The upper half portion is fixedly connected with the lower half portion, two semi-circular holes correspond vertically to form a circular hole, the power transmission line penetrates through the circular hole to be fixed, the upper end iron core is contacted with the lower end iron core to form an annular iron core, and the annular iron core is connected onto a primary side power transmission line through an equipotential line.
Description
Technical field
The present invention relates to a kind of optional outdoor open-type current transformer of polytropic ratio of the 10kV of being applied to power distribution network, belong to the electrical engineering technical field.
Background technology
Application number: 200920110622.4, title: a kind of outdoor open-type current transformer, a kind of outdoor open-type current transformer is disclosed, the semicircle annular core and the secondary coil that comprise two mutually insulateds, described secondary coil is wound on one of them semicircle annular core, be provided with insulating barrier on the semicircle annular core of described coiling secondary coil, described two semicircle annular cores are to being connected into a current transformer main body.But there is single iron core, cannot selects the shortcoming of no-load voltage ratio.
Application number: 201110161672.7, title: a kind of patent of outdoor current transformer discloses a kind of outdoor current transformer.The P1 binding post of described outdoor dry current transformer connects primary winding; primary winding passes secondary coil; after meeting the punching number of turn; be welded on the P2 binding post; secondary coil is made of at iron core the enamelled wire uniform winding; the outlet of secondary coil is welded on respectively on the secondary terminals according to polarity and according to winding quantity and no-load voltage ratio situation; determine the secondary terminals sign; the inner casting epoxy resin of current transformer; the device body is fixed on the base plate; outermost layer at described current transformer is enclosed with the silicon rubber protective layer, and described current transformer is full-closed structure.But there is single iron core, cannot selects no-load voltage ratio, need the shortcoming of supporting bracket.
Application number: 200910013575.6, title: the patent of outdoor current transformer, a kind of outdoor current transformer is disclosed, comprise four windings, iron core and housings of primary winding, secondary coil.Primary winding is wrapped on the primary winding skeleton, and four windings of secondary coil are wrapped on the secondary coil skeleton.Primary winding and secondary coil are installed on the iron core respectively corresponding to ectonexine, and are connected with the lower end of two primary winding binding posts respectively.Eight lead-in wires of secondary coil are connected with eight binding posts of secondary coil respectively.After four windings of primary winding and secondary coil and iron core are laid by desired location, use the poured with epoxy resin moulding, and only expose two primary winding binding posts.Eight lead-in wires of secondary coil respectively with epoxy resin poured body one sidewall on the corresponding connection of eight secondary coil binding posts.The epoxy resin poured body lower surface is fixed on the base.But have a plurality of iron cores, volume is large, and weight is large, the shortcoming of need supporting bracket.
Problems of the prior art: (1) different circuit needs identical equipment, but the Outdoor Current Transformer no-load voltage ratio of selecting on the equipment is inconsistent, has increased the type selecting difficulty; (2) same circuit increases the current transformer outrange that causes because the user increases line power; Current transformer is installed when (3) increasing equipment on the circuit need to be blocked power transmission line.
In the practical application, exist supply line not allow to cut off cable, and the problem that amount of power supply significantly increases year by year, cause the line electricity flow valuve significantly to increase year by year, use application number: 200920110622.4, title: a kind of patent of outdoor open-type current transformer, the problem that equipment is installed after-current instrument transformer outrange can appear, and cause equipment using in the near future just needs replacing current transformer; Use application number: 201110161672.7, title: a kind of patent of outdoor current transformer, the problem of current transformer outrange can appear equally, need to when erection unit, cut off service cable, this is unallowed in practice; Use application number: 200910013575.6, title: the patent of outdoor current transformer, the problem that need to cut off service cable is arranged equally, owing to many core structures of this patent, the current transformer volume is large simultaneously, and weight is large, involves great expense.For existing supply line not allow to cut off cable, and the problem that significantly increases year by year of amount of power supply, the technology that does not address the above problem in existing.
Summary of the invention
To the objective of the invention is in order addressing the above problem, to propose the optional outdoor open-type current transformer of a kind of polytropic ratio.
The optional outdoor open-type current transformer of a kind of polytropic ratio comprises the first half (1), upper end iron core (2), the latter half (3), lower end iron core (4), second siding ring skeleton (5) and second siding ring;
Upper end iron core (2) is positioned at the first half (1) inside, and the first half (1) is provided with the fixedly semicircle orifice of power transmission line with the latter half (3) contact-making surface, and the first half (1) is insulating material;
Second siding ring skeleton (6) is looped around on the lower end iron core (4), N second siding ring is wrapped in above the second siding ring skeleton (6), each second siding ring has two terminals, be used for external, lower end iron core (4) is positioned at the latter half (3) inside, the latter half (3) is provided with the fixedly semicircle orifice of power transmission line with the first half (1) contact-making surface, and the latter half (3) is insulating material;
The first half (1) is fixedly connected with the latter half (3), two semicircle orifices are corresponding up and down, form a circular hole, power transmission line passes in the middle of circular hole, circular hole is confined power transmission line, upper end iron core (2) contacts with lower end iron core (4), forms annular core, and annular core is connected on the power transmission line of former limit by equipotential line.
The invention has the advantages that:
(1) the present invention can select different no-load voltage ratios by selecting different terminals;
(2) iron core of the present invention is compared with many iron cores scheme, and volume is little, and is lightweight;
(3) the present invention is lifted on the wire, and simple installation need not supporting bracket (but needing the bottom fixed support);
Do not need to block power transmission line when (4) Outdoor Current Transformer of the present invention is installed;
(5) the present invention can guarantee to reduce under the prerequisite of identical function the quantity of the device model that buying company need to purchase;
(6) the present invention can make different device unified without the model of the Outdoor Current Transformer of using on the occasion.
Description of drawings
Fig. 1 is structural representation of the present invention;
Among the figure:
1-the first half, 2-upper end iron core 3-the latter half
4-lower end iron core 5-second siding ring skeleton 6-first second siding ring
7-the second second siding ring
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention is the optional outdoor open-type current transformer of a kind of polytropic ratio, as shown in Figure 1, comprises the first half 1, upper end iron core 2, the latter half 3, lower end iron core 4, second siding ring skeleton 5 and second siding ring.
Upper end iron core 2 is positioned at the first half 1 inside, and the first half 1 is provided with the fixedly semicircle orifice of power transmission line with the latter half 3 contact-making surfaces, and the first half 1 is insulating material;
Second siding ring skeleton 6 is looped around on the lower end iron core 4, N second siding ring is wrapped in above the second siding ring skeleton 6, each second siding ring has two terminals, be used for external, lower end iron core 4 is positioned at the latter half 3 inside, the latter half 3 is provided with the fixedly semicircle orifice of power transmission line with the first half 1 contact-making surface, and the latter half 3 is insulating material;
Described insulating material is outdoor epoxy resin.
The first half 1 and the latter half 3 are bolted, two semicircle orifices are corresponding up and down, form a circular hole, power transmission line passes in the middle of circular hole, circular hole is confined power transmission line, upper end iron core 2 contacts with lower end iron core 4, forms annular core, and annular core is connected on the power transmission line of former limit by equipotential line.
The number of second siding ring gets 2 or 3 in the embodiments of the invention, in the time of N=2, as shown in Figure 1, first second siding ring 6 and second second siding ring 7 are wrapped in above the second siding ring skeleton 6,1. and 2. the terminal of first second siding ring 6 is for, 3. and 4. number of turn n1, the terminal of second second siding ring 7 be for, number of turn n2.
Among the present invention, be provided with safe spacing between second siding ring skeleton 6 and the lower end iron core 4, so that after the casting epoxy resin, second siding ring and lower end iron core 4 satisfy the insulating requirements of 10kV power distribution network.
Manufacturing process:
Upper end iron core 2 is inserted in the shell of the first half 1, then inject insulating material in shell, insulating material can be epoxy resin.Final upper end iron core 2 is fixed on the inside of the first half 1, forms the fixedly semicircle orifice of power transmission line on the first half 1 and the latter half 3 contact-making surfaces, and the first half 1 completes.
The manufacturing process of the latter half 3: at first second siding ring skeleton 5 is fixed on the lower end iron core 4, N second siding ring is wrapped on the second siding ring skeleton 5, lower end iron core 4, second siding ring skeleton 5, a N second siding ring are put into the latter half 3 inside, each terminal of second siding ring is external, last casting insulated rings of material epoxy resins, form the fixedly semicircle orifice of power transmission line on the latter half 3 and the first half 1 contact-making surface, the latter half 3 completes.
The course of work:
Installation method: after application insulating tape and sleeve pipe are wound in suitable thickness with power transmission line, with the first half 1 and the latter half 3 power transmission line is confined, and with bolt with tight reliable connection of two parts, simultaneously with upper end iron core 2 and former limit power transmission line by the equipotential line short circuit.
Using method: establishing 6 two terminals of first second siding ring 1. is respectively, 2., and number of turn n1; 3. two terminals of second second siding ring 7 are respectively, 4., and number of turn n2.When circuit needs no-load voltage ratio to be n1:1, use terminal 1., 2. measure electric current, 3., 4. terminal is opened a way; When circuit needs no-load voltage ratio to be n2:1, use terminal 3., 4. measure electric current, 1., 2. terminal is opened a way; When circuit needs no-load voltage ratio be: (n1+n2): in the time of 1, with terminal 2., 3. 1. short circuit adopts, and 4. terminal is measured electric current.
Do not allow to cut off cable for supply line, and the problem that significantly increases year by year of amount of power supply, the present invention adopts the open type design, and the first half 1 and the latter half 3 are clamped the design that bolt is confined behind the cable, do not need to cut off service cable.1. current transformer can utilize 6 two terminals of second siding ring simultaneously, 2. realize three variable no-load voltage ratio n1:1, n2:1 and (n1+n2): 1, the optional design of polytropic ratio has effectively prevented the problem of electric current outrange when guaranteeing the current measurement precision.Simultaneously, the present invention only has an iron core, and volume is little, and is lightweight, and cost is low, more environmental protection.
Claims (5)
1. the optional outdoor open-type current transformer of polytropic ratio is characterized in that, comprises the first half (1), upper end iron core (2), the latter half (3), lower end iron core (4), second siding ring skeleton (5) and second siding ring;
Upper end iron core (2) is positioned at the first half (1) inside, and the first half (1) is provided with the fixedly semicircle orifice of power transmission line with the latter half (3) contact-making surface, and the first half (1) is insulating material;
Second siding ring skeleton (6) is looped around on the lower end iron core (4), N second siding ring is wrapped in above the second siding ring skeleton (6), each second siding ring has two terminals, be used for external, lower end iron core (4) is positioned at the latter half (3) inside, the latter half (3) is provided with the fixedly semicircle orifice of power transmission line with the first half (1) contact-making surface, and the latter half (3) is insulating material;
The first half (1) is fixedly connected with the latter half (3), two semicircle orifices are corresponding up and down, form a circular hole, power transmission line passes in the middle of circular hole, circular hole is confined power transmission line, upper end iron core (2) contacts with lower end iron core (4), forms annular core, and annular core is connected on the power transmission line of former limit by equipotential line.
2. the optional outdoor open-type current transformer of a kind of polytropic ratio according to claim 1 is characterized in that, the number N of described second siding ring gets 2 or 3.
3. the optional outdoor open-type current transformer of a kind of polytropic ratio according to claim 2, it is characterized in that, during described N=2, first second siding ring (6) and second second siding ring (7) are wrapped in above the second siding ring skeleton (6), 1. and 2. the terminal of first second siding ring (6) is for, 3. and 4. number of turn n1, the terminal of second second siding ring (7) be for, number of turn n2; When circuit needs no-load voltage ratio to be n1:1, use terminal 1., 2. measure electric current, 3., 4. terminal is opened a way; Perhaps use terminal 3., 4. measure electric current, 1., 2. terminal is opened a way; When circuit needs no-load voltage ratio be: (n1+n2): in the time of 1, with terminal 2., 3. 1. short circuit adopts, and 4. terminal is measured electric current.
4. the optional outdoor open-type current transformer of a kind of polytropic ratio according to claim 1, it is characterized in that, be provided with safe spacing between described second siding ring skeleton (6) and the lower end iron core (4), second siding ring and lower end iron core (4) satisfy the insulating requirements of 10kV power distribution network.
5. the optional outdoor open-type current transformer of a kind of polytropic ratio according to claim 1 is characterized in that, described insulating material is outdoor epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105361420A CN103050264A (en) | 2012-12-12 | 2012-12-12 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105361420A CN103050264A (en) | 2012-12-12 | 2012-12-12 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
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| CN103050264A true CN103050264A (en) | 2013-04-17 |
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| CN2012105361420A Pending CN103050264A (en) | 2012-12-12 | 2012-12-12 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474223A (en) * | 2013-08-20 | 2013-12-25 | 国家电网公司 | High-voltage equipotential opening current transformer |
| CN104064343A (en) * | 2014-07-02 | 2014-09-24 | 北京德威特继保自动化科技股份有限公司 | Current mutual inductance device and current transformer |
| CN104133103A (en) * | 2014-07-31 | 2014-11-05 | 国网浙江余姚市供电公司 | Device for monitoring overhead wire load currents |
| CN106841743A (en) * | 2016-11-28 | 2017-06-13 | 国网河南省电力公司中牟县供电公司 | Transformer secondary side detects control method and device |
| CN107546017A (en) * | 2017-10-27 | 2018-01-05 | 江苏思源赫兹互感器有限公司 | A kind of combined electromagnetic voltage transformer device body and its manufacture method |
| CN114121437A (en) * | 2021-11-03 | 2022-03-01 | 国网山东省电力公司临沂供电公司 | Open-type current transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2253516Y (en) * | 1996-09-02 | 1997-04-30 | 范建国 | Polytropic ratio metering current transformer for avoiding or indicating fraudulent use of electricity |
| CN201498350U (en) * | 2009-07-31 | 2010-06-02 | 奥菲科泰电气(北京)有限公司 | Outdoor open current mutual inductor |
| CN202134397U (en) * | 2011-07-27 | 2012-02-01 | 珠海市丰兰实业有限公司 | Transformation ratio adjustable type current mutual inductor |
| CN202930201U (en) * | 2012-12-12 | 2013-05-08 | 北京航空航天大学 | Middling pressure outdoor open type adjustable transformation ratio current transformer |
-
2012
- 2012-12-12 CN CN2012105361420A patent/CN103050264A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2253516Y (en) * | 1996-09-02 | 1997-04-30 | 范建国 | Polytropic ratio metering current transformer for avoiding or indicating fraudulent use of electricity |
| CN201498350U (en) * | 2009-07-31 | 2010-06-02 | 奥菲科泰电气(北京)有限公司 | Outdoor open current mutual inductor |
| CN202134397U (en) * | 2011-07-27 | 2012-02-01 | 珠海市丰兰实业有限公司 | Transformation ratio adjustable type current mutual inductor |
| CN202930201U (en) * | 2012-12-12 | 2013-05-08 | 北京航空航天大学 | Middling pressure outdoor open type adjustable transformation ratio current transformer |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474223A (en) * | 2013-08-20 | 2013-12-25 | 国家电网公司 | High-voltage equipotential opening current transformer |
| CN103474223B (en) * | 2013-08-20 | 2016-01-27 | 国家电网公司 | The equipotential opening current transformer of a kind of high pressure |
| CN104064343A (en) * | 2014-07-02 | 2014-09-24 | 北京德威特继保自动化科技股份有限公司 | Current mutual inductance device and current transformer |
| CN104133103A (en) * | 2014-07-31 | 2014-11-05 | 国网浙江余姚市供电公司 | Device for monitoring overhead wire load currents |
| CN106841743A (en) * | 2016-11-28 | 2017-06-13 | 国网河南省电力公司中牟县供电公司 | Transformer secondary side detects control method and device |
| CN106841743B (en) * | 2016-11-28 | 2023-07-07 | 国网河南省电力公司中牟县供电公司 | Method and device for detecting and controlling secondary side of transformer |
| CN107546017A (en) * | 2017-10-27 | 2018-01-05 | 江苏思源赫兹互感器有限公司 | A kind of combined electromagnetic voltage transformer device body and its manufacture method |
| CN107546017B (en) * | 2017-10-27 | 2023-10-24 | 江苏思源赫兹互感器有限公司 | Combined electromagnetic voltage transformer body and manufacturing method thereof |
| CN114121437A (en) * | 2021-11-03 | 2022-03-01 | 国网山东省电力公司临沂供电公司 | Open-type current transformer |
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Application publication date: 20130417 |