CN202930201U - Middling pressure outdoor open type adjustable transformation ratio current transformer - Google Patents
Middling pressure outdoor open type adjustable transformation ratio current transformer Download PDFInfo
- Publication number
- CN202930201U CN202930201U CN 201220684310 CN201220684310U CN202930201U CN 202930201 U CN202930201 U CN 202930201U CN 201220684310 CN201220684310 CN 201220684310 CN 201220684310 U CN201220684310 U CN 201220684310U CN 202930201 U CN202930201 U CN 202930201U
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- Prior art keywords
- iron core
- siding ring
- half part
- end iron
- transmission line
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Abstract
The utility model discloses a middling pressure outdoor open type adjustable transformation ratio current transformer including an upper half part, an upper iron core, a lower half part, a lower iron core, a secondary side coil frame, and secondary side coils. The upper iron core is arranged inside the upper half part, the surface of the upper half part, contacting with the lower half part, is provided with a semi-circular hole for fixing a transmission line, the upper half part is made from insulating materials, the secondary side coil frame encircles on the lower iron core, N secondary side coils wind on the secondary side coil frame, each secondary side coil is provided with two terminals for external connection, the lower iron core is arranged inside the lower half part, the surface of the lower half part, contacting with the upper half part, is provided with a semi-circular hole for fixing a transmission line, and the lower half part is made from insulating materials, the upper half part is fixedly connected with the lower half part, the two semi-circular holes are corresponding to each other vertically to combine a circular hole, the transmission lines penetrate through the middle of the circular holes which confine the transmission lines, the upper iron core is contacted with the lower iron core to combine a circular iron core, and the circular iron core is connected on a primary side transmission line via an equipotential line.
Description
Technical field
The utility model relates to a kind of middle pressure outdoor open-type no-load voltage ratio adjustable current instrument transformer of the 10kV of being applied to power distribution network, belongs 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 on iron core the enamelled wire uniform winding, the outlet of secondary coil is welded on respectively on 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 base plate, outermost layer at described current transformer is enclosed with the silicon rubber protective layer, 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 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 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 equipment is inconsistent, has increased the type selecting difficulty; (2) same circuit increases because the user increases line power the current transformer outrange that causes; Current transformer is installed when (3) increasing equipment on circuit need to be blocked power transmission line.
In 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 cut off service cable when erection unit, 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, due 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
The purpose of this utility model is in order to address the above problem, to propose a kind of middle pressure outdoor open-type no-load voltage ratio adjustable current instrument transformer.
A kind of middle pressure outdoor open-type no-load voltage ratio adjustable current instrument transformer 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 lower end iron core (4), N second siding ring is wrapped in above 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 utility model has the advantage of:
(1) the utility model can be selected different no-load voltage ratios by selecting different terminals;
(2) iron core of the utility model, compare with many iron cores scheme, and volume is little, and is lightweight;
(3) the utility model is lifted on 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 utility model is installed;
(5) the utility model can guarantee to reduce under the prerequisite of identical function the quantity of the device model that buying company need to purchase;
(6) the utility model can make different device unified without the model of the Outdoor Current Transformer of using on occasion.
Description of drawings
Fig. 1 is structural representation of the present utility model;
In 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 utility model is described in further detail below in conjunction with drawings and Examples.
The utility model is a kind of middle pressure outdoor open-type no-load voltage ratio adjustable current instrument transformer, 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 lower end iron core 4, N second siding ring is wrapped in above 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.
In embodiment of the present utility model, the number of second siding ring gets 2 or 3, in the time of N=2, as shown in Figure 2, first second siding ring 6 and second second siding ring 7 are wrapped in above 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.
In the utility model, be provided with safe spacing between second siding ring skeleton 6 and lower end iron core 4, after making 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 lower end iron core 4, N second siding ring is wrapped on 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, two parts are closely reliably connected, simultaneously upper end iron core 2 and former limit power transmission line are passed through 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, adopt, 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 utility model adopts the open type design, and the first half 1 and the latter half 3 are clamped the design that bolt is confined after 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 utility model only has an iron core, and volume is little, and is lightweight, and cost is low, more environmental protection.
Claims (5)
1. press outdoor open-type no-load voltage ratio adjustable current instrument transformer in one kind, it is characterized in that, comprise 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 lower end iron core (4), N second siding ring is wrapped in above 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. a kind of middle pressure outdoor open-type no-load voltage ratio adjustable current instrument transformer according to claim 1, is characterized in that, the number N of described second siding ring gets 2 or 3.
3. a kind of middle pressure outdoor open-type no-load voltage ratio adjustable current instrument transformer 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 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, adopt, and 4. terminal is measured electric current.
4. a kind of middle pressure outdoor open-type no-load voltage ratio adjustable current instrument transformer according to claim 1, it is characterized in that, be provided with safe spacing between described second siding ring skeleton (6) and lower end iron core (4), second siding ring and lower end iron core (4) satisfy the insulating requirements of 10kV power distribution network.
5. a kind of middle pressure outdoor open-type no-load voltage ratio adjustable current instrument transformer 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 |
|---|---|---|---|
| CN 201220684310 CN202930201U (en) | 2012-12-12 | 2012-12-12 | Middling pressure outdoor open type adjustable transformation ratio current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220684310 CN202930201U (en) | 2012-12-12 | 2012-12-12 | Middling pressure outdoor open type adjustable transformation ratio current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202930201U true CN202930201U (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220684310 Expired - Fee Related CN202930201U (en) | 2012-12-12 | 2012-12-12 | Middling pressure outdoor open type adjustable transformation ratio current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202930201U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050264A (en) * | 2012-12-12 | 2013-04-17 | 北京航空航天大学 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
| CN104637660A (en) * | 2015-02-06 | 2015-05-20 | 四川蓝讯宝迩电子科技有限公司 | Current transformer with transformation ratio capable of being adjusted through rotation |
| CN108680781A (en) * | 2018-07-09 | 2018-10-19 | 广东电网有限责任公司 | Current transformer and split-core type meter |
| CN109031178A (en) * | 2018-09-14 | 2018-12-18 | 国网江苏省电力有限公司连云港市赣榆区供电分公司 | A method of it is inconsistent to solve current transformer ratio |
-
2012
- 2012-12-12 CN CN 201220684310 patent/CN202930201U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050264A (en) * | 2012-12-12 | 2013-04-17 | 北京航空航天大学 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
| CN104637660A (en) * | 2015-02-06 | 2015-05-20 | 四川蓝讯宝迩电子科技有限公司 | Current transformer with transformation ratio capable of being adjusted through rotation |
| CN108680781A (en) * | 2018-07-09 | 2018-10-19 | 广东电网有限责任公司 | Current transformer and split-core type meter |
| CN109031178A (en) * | 2018-09-14 | 2018-12-18 | 国网江苏省电力有限公司连云港市赣榆区供电分公司 | A method of it is inconsistent to solve current transformer ratio |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20131212 |