CN204117835U - A kind of single-phase cast-type Combined metering dry type mutual inductor - Google Patents
A kind of single-phase cast-type Combined metering dry type mutual inductor Download PDFInfo
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- CN204117835U CN204117835U CN201420534413.3U CN201420534413U CN204117835U CN 204117835 U CN204117835 U CN 204117835U CN 201420534413 U CN201420534413 U CN 201420534413U CN 204117835 U CN204117835 U CN 204117835U
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Abstract
The utility model relates to a kind of single-phase cast-type Combined metering dry type mutual inductor, comprise resin enclosure, current transformer and voltage transformer, described current transformer is arranged at resin enclosure left upper part, the two-terminal of the primary winding of current transformer connects two conducting rods being vertically installed in resin enclosure left end respectively, described voltage transformer is arranged at resin enclosure right-hand member bottom, a winding of voltage transformer connects arbitrary terminal of current transformer primary winding in resin enclosure, the secondary winding of voltage transformer connects the stick harness being vertically installed in resin enclosure right-hand member top, described current transformer primary winding direction of winding is parallel to voltage transformer winding direction of winding.Its structure is simple, convenient for production, takes up room little, and creep distance is large, and Electric Field Distribution is even, and measuring accuracy is high, has higher dynamic and thermal stability performance and good anti-conveyance capacity, is applicable in the environment of high filth, High aititude and uses.
Description
Technical field
The utility model relates to a kind of instrument transformer, is that one makes high-tension measurement or used for relay protection specifically, single-phase cast-type Combined metering dry type mutual inductor.
Background technology
Existing outdoor Combined metering instrument transformer, great majority adopt the compound inslation of transformer oil or indoor silicone jacket silicone rubber sleeve, wherein adopt transformer oil easy oil leakage, volume large, be not easy to maintenance, the another kind of overcoat adopting the external insulation of the instrument transformer of the compound inslation of indoor silicone jacket silicone rubber sleeve mainly to rely on silicon rubber to make, but the reduction of silicone rubber products Long-Time Service hydrophobicity, galvanic corrosion damage, efflorescence, cracking; Add the bonding of two kinds of dielectrics, easily there is bubble and cause the serious consequence such as creepage trace, instrument transformer insulation breakdown, blast.Existing outdoor Combined metering instrument transformer structure adopt mostly current mutual inductor coil and voltage transformer coil same level line install, volume is large, waste of material is many, in addition current transformer primary winding and voltage transformer previous level are arranged, electric field strength is concentrated, office amplifies, and the magnetic field that current transformer primary current produces has an impact to voltage transformer, causes that precision is not high or error is overproof.
Summary of the invention
For the deficiency in combination transformer structure in prior art and performance, it is simple, compact that the utility model provides a kind of structure, and volume is little, and Electric Field Distribution is even, the single-phase cast-type Combined metering dry type mutual inductor that certainty of measurement is high.
The technical solution adopted in the utility model is: a kind of single-phase cast-type Combined metering dry type mutual inductor, comprise resin enclosure, current transformer and voltage transformer, described current transformer is arranged at resin enclosure left upper part, the two-terminal of the primary winding of current transformer connects two conducting rods being vertically installed in resin enclosure left end respectively, described voltage transformer is arranged at resin enclosure right-hand member bottom, a winding of voltage transformer connects arbitrary terminal of current transformer primary winding in resin enclosure, the secondary winding of voltage transformer connects the stick harness being vertically installed in resin enclosure right-hand member top, described current transformer primary winding direction of winding is parallel to voltage transformer winding direction of winding.
The lateral wall of described resin enclosure is provided with secondary seal terminal box, the two-terminal access secondary seal terminal box of the two-terminal of the secondary coil of current transformer, the secondary winding of voltage transformer.
Described resin enclosure is outdoor bisphenol a resin shell.
Described current transformer primary winding direction of winding is perpendicular to the iron core of voltage transformer.
Described current transformer primary winding is higher than voltage transformer winding.
Compared with prior art, the beneficial effects of the utility model are:
1, by current mutual inductor coil, voltage transformer coil, outdoor bisphenol a resin shell is poured into a mould one-body molded.Strengthen external insulation, have the features such as dielectric strength is high, mechanical strength is high, moistureproof, achieve non-oil ultra high vacuum system, eliminate the shortcomings such as oil impregnate completely, and in actual production, eliminate the trouble of the bonding silicone rubber sleeve of secondary, operation is simple, easy to operate.
2, current transformer adopts the inverted structure of coiling on vertical direction, is located at the upper left side of voltage transformer.Current mutual inductor coil is not placed with voltage transformer same level line, takes up room little, and the more compact structurally making high voltage electric equipment design, volume is little, lightweight.
3, current transformer primary winding is positioned at the upper left side of voltage transformer, and two high voltage electric field spacings widen, and electric field strength is more even, solves the difficult problem that combination transformer office amplifies.In addition the temperature rise of inverted structure when big current and short-circuit current multiple higher time, dynamic current ratio is easier to meet the demands.
4, iron core of voltage transformer and current transformer primary winding are arranged vertically up and down, the increase of a wire of current transformer and the magnetic field distance of iron core of voltage transformer, place because the primary winding of current transformer is vertical with voltage iron core in addition, the magnetic line of force not killer voltage transformer iron core magnetic field of current transformer, very little to the influence of magnetic field of voltage transformer, ensure that the error precision of voltage transformer.
The utility model structure is simple, convenient for production, takes up room little, and creep distance is large, and Electric Field Distribution is even, and measuring accuracy is high, has higher dynamic and thermal stability performance and good anti-conveyance capacity, is applicable in the environment of high filth, High aititude and uses.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model circuit theory diagrams.
In figure: outdoor bisphenol a resin shell 1, current transformer 2, primary winding 21, secondary coil 22, voltage transformer 3, a winding 31, secondary winding 32, iron core 33, conducting rod 4, stick harness 5, secondary seal terminal box 6.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Shown in Fig. 1,2, a kind of single-phase cast-type Combined metering dry type mutual inductor comprises outdoor bisphenol a resin shell 1, current transformer 2, voltage transformer 3, conducting rod 4, stick harness 5 and secondary seal terminal box 6.The lateral wall of outdoor bisphenol a resin shell 1 is provided with secondary seal terminal box 6, and the left upper part of outdoor bisphenol a resin shell 1 is provided with two conducting rods 4, and the right-hand member top of outdoor bisphenol a resin shell 1 is provided with a stick harness 5; Current transformer 2 is arranged at outdoor bisphenol a resin shell 1 left upper part, and the two-terminal of the primary winding 21 of current transformer 2 connects two conducting rods 4 respectively; Voltage transformer 3 is arranged at outdoor bisphenol a resin shell 1 right-hand member bottom, the a winding 31 interior arbitrary terminal connecting current transformer primary winding 21 of bisphenol a resin shell 1 out of doors of voltage transformer 3, the secondary winding 32 of voltage transformer 3 connects stick harness 5, and current transformer 3 primary winding 31 direction of winding is parallel to voltage transformer 3 winding 31 direction of windings.The two-terminal access secondary seal terminal box 6 of the two-terminal of the secondary coil 22 of current transformer 2, the secondary winding 32 of voltage transformer 3, current transformer primary winding direction of winding is perpendicular to the iron core of voltage transformer, and current transformer primary winding is higher than voltage transformer winding.
Claims (5)
1. a single-phase cast-type Combined metering dry type mutual inductor, comprise resin enclosure, current transformer and voltage transformer, it is characterized in that: described current transformer is arranged at resin enclosure left upper part, the two-terminal of the primary winding of current transformer connects two conducting rods being vertically installed in resin enclosure left end respectively, described voltage transformer is arranged at resin enclosure right-hand member bottom, a winding of voltage transformer connects arbitrary terminal of current transformer primary winding in resin enclosure, the secondary winding of voltage transformer connects the stick harness being vertically installed in resin enclosure right-hand member top, described current transformer primary winding direction of winding is parallel to voltage transformer winding direction of winding.
2. one according to claim 1 single-phase cast-type Combined metering dry type mutual inductor, it is characterized in that: the lateral wall of described resin enclosure is provided with secondary seal terminal box, the two-terminal access secondary seal terminal box of the two-terminal of the secondary coil of current transformer, the secondary winding of voltage transformer.
3. one according to claim 1 and 2 single-phase cast-type Combined metering dry type mutual inductor, is characterized in that: described resin enclosure is outdoor bisphenol a resin shell.
4. one according to claim 1 single-phase cast-type Combined metering dry type mutual inductor, is characterized in that: described current transformer primary winding direction of winding is perpendicular to the iron core of voltage transformer.
5. one according to claim 1 single-phase cast-type Combined metering dry type mutual inductor, is characterized in that: described current transformer primary winding is higher than voltage transformer winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420534413.3U CN204117835U (en) | 2014-09-18 | 2014-09-18 | A kind of single-phase cast-type Combined metering dry type mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420534413.3U CN204117835U (en) | 2014-09-18 | 2014-09-18 | A kind of single-phase cast-type Combined metering dry type mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204117835U true CN204117835U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420534413.3U Active CN204117835U (en) | 2014-09-18 | 2014-09-18 | A kind of single-phase cast-type Combined metering dry type mutual inductor |
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| CN (1) | CN204117835U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240929A (en) * | 2014-09-18 | 2014-12-24 | 江苏科兴电器有限公司 | Single-phase pouring type combination measuring dry transformer |
-
2014
- 2014-09-18 CN CN201420534413.3U patent/CN204117835U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240929A (en) * | 2014-09-18 | 2014-12-24 | 江苏科兴电器有限公司 | Single-phase pouring type combination measuring dry transformer |
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