CN201465780U - three-phase four-wire intensive transformer - Google Patents
three-phase four-wire intensive transformer Download PDFInfo
- Publication number
- CN201465780U CN201465780U CN2009200868076U CN200920086807U CN201465780U CN 201465780 U CN201465780 U CN 201465780U CN 2009200868076 U CN2009200868076 U CN 2009200868076U CN 200920086807 U CN200920086807 U CN 200920086807U CN 201465780 U CN201465780 U CN 201465780U
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Abstract
The utility model relates to a three-phase four-wire intensive transformer, which comprises a transformer shell, an A, B and C three-phase magnetic core contained in the shell and a winding arranged on the three-phase magnetic core, an annular magnetic core is provided, an A, B and C three-phase line and a null line N pass through the hollow annular magnetic core; the annular magnetic core is positioned above the A, B and C three-phase magnetic core arranged in the transformer shell; a zero sequence winding is arranged on the annular magnetic core; and the winding arranged on the A, B and C three-phase magnetic core and the output end of the zero sequence winding are electrically connected with corresponding pins of pin blocks arranged on the transformer shell. The transformer can monitor the A, B and C three-phase currents at real time, can prevent the fire hazard caused by wire heat due to excess line load, can monitor the leakage current due to unbalanced three phases by the zero sequence winding when people are subject to electricity shock and the distribution line is damaged due to various causes, and can guarantee the lines and the personnel safety.
Description
Technical field
The utility model relates to electronic devices and components field or electronic monitoring and fields of measurement, especially a kind of instrument transformer.
Background technology
Chinese patent ZL200820076779.5 discloses " a kind of multi-functional current transformer ", be built-in with 1,2 or 3 current transformer unit in the insulation shell of described current transformer, there are 2 or 3 iron cores that are wound with metering coil and magnetic test coil respectively each current transformer unit, an elementary shared elementary lead-in wire of metering coil and magnetic test coil, metering coil and magnetic test coil are mutual isolation setting, the secondary lead of metering coil connects the metering circuit of ammeter, and the secondary lead of magnetic test coil connects the testing circuit of ammeter.The utility model not only has the very high accuracy of measuring of general current transformer, can also monitor open circuit, the short-circuit condition of current input terminal, by several different methods such as employing high-frequency signal injections, solve and detect CT level open circuit of front end, short-circuit condition monitoring problem, and power consumption is lower.Obviously; three current transformer unit are set in the housing of described current transformer; then can measure and detect A, the B of three-phase four-wire system, each unit of C three-phase; but this set only is suitable for occasion that the current conditions of every phase is measured and detected; lack three-phase equilibrium and creepage protection function, in addition, because it is a direct acquired signal on each unit of A, B, C three-phase; therefore, its reaction precision also has much room for improvement.
The utility model content
The purpose of this utility model is according in the three-phase four-wire system, and the phase difference principle between the phase line adopts A, B, C three-phase are comprehensively detected and the leakage current protection, and the intensive instrument transformer of a kind of three-phase and four-line that provides.
The technical solution of the utility model is achieved in that
Provide a kind of three-phase and four-line intensive instrument transformer, the winding that comprises transformer casing and be placed on shell interior A, B, C three-phase core and the three-phase core constitutes, it is characterized in that: a toroidal core is arranged, the phase line of described A, B, C three-phase and zero line N all pass through in the toroidal core of hollow, described toroidal core is positioned at described A, the B of transformer casing, the top of C three-phase core, and described toroidal core is provided with the zero sequence winding; Winding on described A, B, the C three-phase core and the output of zero sequence winding all be arranged on transformer casing on the corresponding pin of pin block be electrically connected.
The intensive instrument transformer of aforesaid three-phase and four-line is characterized in that: be provided with conduit in the described transformer casing.A, B, C three-phase core are nested with on conduit, and described conduit is provided with four altogether, pass through for A, B, C triple line and zero line N.
The intensive instrument transformer of aforesaid three-phase and four-line is characterized in that: also be provided with the test winding on the described toroidal core.Described test winding can detect the utility model working condition.
The utility model is the requirement according to intelligent Electric Leakage Fire Alarm, and a instrument transformer that integrates measurement and earth leakage protective of exploitation.With air switch energy slitless connection; can monitor A, B, C three-phase current size in real time; preventing that line load is excessive causes that electric wire heating causes fire; the leakage current that three-phase imbalance produces in the time of can be damaged owing to a variety of causes by indirect electric shock of the zero sequence winding monitoring person and distribution line; play electric leakage safeguard protection effect; have compact conformation, be convenient to install, characteristics such as powerful.
Description of drawings
Fig. 1 is a schematic perspective view of the present utility model.
Fig. 2 is the amplification and the corresponding A of pin block among Fig. 1.The floor map of B, C three-phase inlet wire and zero line N inlet wire.
Fig. 3 is a part-structure exploded view of the present utility model.
Fig. 4 is an electrical schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing 1 to accompanying drawing 4 embodiment of the present utility model is described:
Referring to accompanying drawing 1 and accompanying drawing 2, provide a kind of three-phase and four-line intensive instrument transformer, the winding 31 that comprises transformer casing 1 and be placed on A, B, C three-phase core 3 and the three-phase core 3 in the shell 1 constitutes, one toroidal core 4 is set, the phase line of described A, B, C three-phase and zero line N all pass through in the toroidal core 4 of hollow, described toroidal core 4 is positioned at described A, the B of transformer casing 1, the top of C three-phase core 3, and described toroidal core 4 is provided with zero sequence winding 41; Winding 31 on described A, B, the C three-phase core 3 and the output of zero sequence winding 41 all be arranged on transformer casing 1 on the corresponding pin of pin block 2 be electrically connected.
Be provided with conduit 11 in the described transformer casing 1.A, B, C three-phase core 3 are nested with on conduit 11, and described conduit 11 is provided with four altogether, pass through for A, B, C triple line and zero line N.
Also be provided with test winding 42 on the described toroidal core 4.Described test winding 42 can detect the utility model working condition.
Referring to accompanying drawing 2 and accompanying drawing 4, electrical connection of the present utility model is described:
Intensive instrument transformer the 1st pin of three-phase and four-line described in the accompanying drawing 2, the 2nd pin connect A, B, C three-phase common port; The 3rd pin, the 4th pin connect A phase output terminal, the 5th pin, the 6th pin and connect B phase output terminal, the 7th pin, the 8th pin and connect the C phase output terminal; The 9th pin, the 10th pin and the 11st pin, the 12nd pin connecting to neutral preface winding output; The 13rd pin, the 14th pin and the 15th pin, the 16th pin connect test winding input.
Though above shown detailed embodiment of the present utility model, apparent, those skilled in the art is under prerequisite of the present utility model, can carry out the part modifications and changes; The content of mentioning in description above and the accompanying drawing is the illustration of property as an illustration only, is not as to restriction of the present utility model, has the intensive instrument transformer of three-phase and four-line of above-mentioned technical characterictic, all falls into the utility model protection range.
Claims (3)
1. the intensive instrument transformer of three-phase and four-line, the winding that comprises transformer casing and be placed on shell interior A, B, C three-phase core and the three-phase core constitutes, it is characterized in that: a toroidal core is arranged, the phase line of described A, B, C three-phase and zero line N all pass through in the toroidal core of hollow, described toroidal core is positioned at described A, the B of transformer casing, the top of C three-phase core, and described toroidal core is provided with the zero sequence winding; Winding on described A, B, the C three-phase core and the output of zero sequence winding all be arranged on transformer casing on the corresponding pin of pin block be electrically connected.
2. the intensive instrument transformer of three-phase and four-line as claimed in claim 1, it is characterized in that: be provided with conduit in the described transformer casing, A, B, C three-phase core are nested with on conduit, and described conduit is provided with four altogether, pass through for A, B, C triple line and zero line N.
3. the intensive instrument transformer of three-phase and four-line as claimed in claim 1 is characterized in that: also be provided with the test winding on the described toroidal core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200868076U CN201465780U (en) | 2009-06-18 | 2009-06-18 | three-phase four-wire intensive transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200868076U CN201465780U (en) | 2009-06-18 | 2009-06-18 | three-phase four-wire intensive transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201465780U true CN201465780U (en) | 2010-05-12 |
Family
ID=42393128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200868076U Expired - Fee Related CN201465780U (en) | 2009-06-18 | 2009-06-18 | three-phase four-wire intensive transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201465780U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578724A (en) * | 2012-07-24 | 2014-02-12 | 江苏创能电器有限公司 | Combined mutual inductor |
-
2009
- 2009-06-18 CN CN2009200868076U patent/CN201465780U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578724A (en) * | 2012-07-24 | 2014-02-12 | 江苏创能电器有限公司 | Combined mutual inductor |
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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: 20100512 Termination date: 20120618 |