CN201213095Y - Low-voltage current inductor having two groups of signal outputs - Google Patents
Low-voltage current inductor having two groups of signal outputs Download PDFInfo
- Publication number
- CN201213095Y CN201213095Y CNU2008200383456U CN200820038345U CN201213095Y CN 201213095 Y CN201213095 Y CN 201213095Y CN U2008200383456 U CNU2008200383456 U CN U2008200383456U CN 200820038345 U CN200820038345 U CN 200820038345U CN 201213095 Y CN201213095 Y CN 201213095Y
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- winding
- secondary outlet
- auxiliary winding
- main winding
- signal
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Abstract
The utility model relates to a low-voltage current mutual inductor with two groups of signal output, which is used for outputting current signals and comprises a main winding (1) and a subsidiary winding (2), wherein the main winding (1) outputs standard alternating signals of 5 A or 1 A, the subsidiary winding (2) outputs standard alternating signals of 20 mA or 5 mA, the secondary outgoing line of the main winding (1) are respectively secondary outgoing line I (IS1) and secondary outgoing line II (1S2), and the secondary outgoing line of the subsidiary winding (2) are respectively secondary outgoing line III (2S1 ) and secondary outgoing line IV (2S2). When the main winding (1) outputs standard signals of 5A, the secondary outgoing line II (1S2) passes through the subsidiary winding (2) to be wound by 4 turns or 1 turn, or when the main winding (1) outputs standard signals 1A, the secondary outgoing line II (1S2) passes through the subsidiary winding (2) to be wound by 20 turns or 5 turns. The current mutual inductor of the utility model can output standard alternating signals of 5 A or 1 A, and can also output standard alternating signals of 20 mA or 5 mA.
Description
Technical field
The utility model relates to a kind of low-voltage current mutual inductor (hereinafter to be referred as current transformer), is used for 0.66kV and following low-voltage distribution terminal system to current signals.
Background technology
The current transformer outputting standard AC signal that existing market is sold all is 5A or 1A.Along with science and technology development, current transformer 5A or the output of 1A signal can not have been satisfied some users' needs far away.As the small-signal input equipment for distance transmission system and Computerized monitor system, 5A or the output of 1A signal just can not have been satisfied the demand.Electric current is too big, and loss is big, and transmission range is near, and may cause computer equipment to damage, so can only select on the market existing current transformer adjunction transmitter again.And transmitter output is direct current 4-20mA, need add accessory power supply, and the price comparison costliness of transmitter.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provide a kind of both can outputting standard AC signal 5A or 1A, again can outputting standard AC signal 20mA or the low-voltage current mutual inductor that two groups of signals outputs are arranged of 5mA.
The purpose of this utility model is achieved in that a kind of low-voltage current mutual inductor that two groups of signal outputs are arranged, it is characterized in that described current transformer includes main winding and auxiliary winding, described main winding outputting standard AC signal is 5A or 1A, auxiliary winding outputting standard AC signal 20mA or 5mA, the secondary outlet of main winding is respectively secondary outlet I and secondary outlet II, the secondary outlet of auxiliary winding is respectively secondary outlet III and secondary outlet IV, when main winding outputting standard signal was 5A, secondary outlet II passed auxiliary winding coiling 4 circles (auxiliary winding output this moment 20mA) or 1 circle (auxiliary winding output this moment 5mA); Or main winding outputting standard signal is when being 1A, and secondary outlet II passes auxiliary winding coiling 20 circles (auxiliary winding output this moment 20mA) or 5 circles (auxiliary winding output this moment 5mA).
So the utility model current transformer can be exported two kinds of signals simultaneously, one group can outputting standard AC signal 5A or 1A, and another group can outputting standard AC signal 20mA or 5mA.Export 5A or 1A for one group, can be used for the measurement of electric current, can not use 1.5mm if do not need
2Short circuit; Another group output 20mA or 5mA can be used for the distance transmission system and the Computerized monitor system of electric current, can not use 1.5mm if do not need
2Short circuit.This instrument transformer price is well below transmitter, and do not need to add accessory power supply, price than general current transformer price slightly height a bit, so instrument transformer of the present invention is both economical.
Description of drawings
Fig. 1 has the surface structure schematic diagram of the current transformer of two groups of signal outputs for the utility model.
Fig. 2 is the Facad structure schematic diagram of Fig. 1.
Fig. 3 is the cut-away view of Fig. 2.
Fig. 4 has the fundamental diagram of the current transformer of two groups of signal outputs for the utility model.
Fig. 5 has the circuit connection schematic diagram of the current transformer of two groups of signal outputs for the utility model.
Fig. 6 is mounting means one schematic diagram of the present utility model.
Fig. 7 is mounting means two schematic diagrames of the present utility model.
Among the figure: main winding 1, auxiliary winding 2, little binding post 3, big binding post 4, mounting bracket 5, housing 6, secondary outlet I1S
1, secondary outlet II1S
2, secondary outlet III2S
1, secondary outlet IV2S
2
Embodiment
A kind of low-voltage current mutual inductor that two groups of signal outputs are arranged that the utility model relates to is made up of two windings.Wherein, one is main winding 1, and another is an auxiliary winding 2.Main winding 1 outputting standard AC signal is 5A or 1A, auxiliary winding 2 outputting standard AC signal 20mA or 5mA.
Referring to Fig. 1, a kind of low-voltage current mutual inductor that two groups of signal outputs are arranged that the present invention relates to,
Form by housing 6 and the main winding 1, auxiliary winding 2, big binding post 4, little binding post 3 and the mounting brackets 5 that are arranged in the housing 6.Auxiliary winding 2 secondary outlets are respectively secondary outlet III2S
1With secondary outlet IV2S
2When main winding 1 outputting standard AC signal is 5A, as secondary outlet I1S
1When passing auxiliary winding 2 coilings 4 circles, outputting standard exchanges letter for 20mA, as secondary outlet I1S
1When passing auxiliary winding 2 coilings 1 circle, outputting standard exchanges letter and is 5mA; When main winding 1 outputting standard AC signal is 1A, as secondary outlet I1S
1When passing auxiliary winding 2 coilings 20 circles, outputting standard exchanges letter for 20mA, as secondary outlet I1S
1When passing auxiliary winding 2 coilings 5 circles, outputting standard exchanges letter and is 5mA.The secondary outlet I1S of main winding 1
1With secondary outlet II1S
2Weld big binding post, the secondary outlet III2S of auxiliary winding 2
1, secondary outlet IV2S
2Weld little binding post.Main winding 1 and auxiliary winding 2 that cooperation winds are put into housing, and install mounting bracket 5.
Operation principle such as Fig. 4:
Current transformer is under desirable working condition, and its error is 0, so we have I
1* N
1=I
2* N
2I wherein
1Be rated primary current, N
1Be a umber of turn of current transformer main winding, I
2Be rated secondary current, be generally 5A, N
2The secondary winding number of turn for the current transformer main winding.So in main winding, flow through primary current I
1The time, because electromagnetic induction will have induced potential in secondary winding, connect secondary load Z at main winding
2nSituation under, secondary current I is just arranged
2Circulation, the primary current in the power circuit has nothing in common with each other, by number of turn N of current transformer main winding
1, secondary number of turn N
2Between the configuration of turn ratio, the 5A of general different primary current conversion standards or the secondary current of 1A, leading-out terminal is 1S
1, 1S
2According to the operation principle of transformer, when primary current I1 flows through a number of turn and is the main winding of N1 current transformer, will set up a magnetic potential and be ampere-turn again one time, the minimum ampere-turn of the main winding of instrument transformer of the present invention is 75 ampere-turns, is up to 6300 ampere-turns.In like manner, secondary current I
2With secondary winding number of turn N
2Product be the secondary ampere-turn, one time ampere-turn equals the secondary ampere-turn.Main winding secondary current I
2The auxiliary winding that (5A) to flow through number of turn of coiling be 4 circles is that the auxiliary winding of 1000 circles (be convenience of calculation, the following secondary winding number of turn is an example with 1000 circles all) induces electric current I by secondary winding
3(20mA), according to above-mentioned principle, can draw I
3=I
2* 4 ÷ 1000=5 * 4=0.02A are 20mA, and leading-out terminal is 2S
1, 2S
2If secondary current I
2(1A) flow through the auxiliary winding that the coiling number of turn is 20 circles, auxiliary winding induces electric current I by winding 1000 circles
3, can draw I
3=I
2* 20 ÷ 1000=1 * 20 ÷ 1000=0.020A=20mA equal 20 ampere-turns so an ampere-turn of auxiliary winding equals the secondary ampere-turn.
The circuit connection schematic diagram as shown in Figure 5.
A windings in series of current transformer in test line, the secondary outlet I1S of main winding
1, secondary outlet II1S
2Can connect measuring instrument, relay or automatic control equipment, but the secondary circuit total load must not be greater than Z
2n, the secondary outlet III2S of auxiliary winding
1, secondary outlet IV2S
2Can connect the small-signal input equipment of distance transmission system and Computerized monitor system.
Mounting means:
Instrument transformer has two kinds of mounting meanss, a kind of be primary current at 75A and above instrument transformer, directly instrument transformer is fixed on the bus-bar, as shown in Figure 6 with arc bonding jumper is fixing by bus-bar.Another kind be primary current below 75A, winding need wear two circles above need with mounting bracket directly and cabinet fix, as shown in Figure 7.
Claims (4)
1, a kind of low-voltage current mutual inductor that two groups of signal outputs are arranged, it is characterized in that described current transformer includes main winding (1) and auxiliary winding (2), described main winding (1) outputting standard AC signal is 5A or 1A, auxiliary winding (2) outputting standard AC signal 20mA or 5mA, the secondary outlet of main winding (1) is respectively secondary outlet I (1S
1) secondary outlet II (1S
2), the secondary outlet of auxiliary winding (2) is respectively secondary outlet III (2S
1) and secondary outlet IV (2S
2).
2, a kind of low-voltage current mutual inductor that two groups of signal outputs are arranged according to claim 1 is when is characterized in that described main winding (1) outputting standard AC signal is 5A, as secondary outlet I (1S
1) when passing auxiliary winding (2) coiling 4 circles, outputting standard exchanges letter for 20mA, as secondary outlet I (1S
1) when passing auxiliary winding (2) coiling 1 circle, outputting standard exchanges letter and is 5mA; When described main winding (1) outputting standard AC signal is 1A, as secondary outlet I (1S
1) when passing auxiliary winding (2) coiling 20 circles, outputting standard exchanges letter for 20mA, as secondary outlet I (1S
1) when passing auxiliary winding (2) coiling 5 circles, outputting standard exchanges letter and is 5mA.
3, a kind of current transformer that the output of two groups of signals is arranged according to claim 1 and 2 is characterized in that the secondary outlet I (1S of described main winding (1)
1) and secondary outlet II (1S
2) weld big binding post (4), the secondary outlet III (2S of auxiliary winding (2)
1) and secondary outlet IV (2S
2) welding little binding post (3), described main winding (1), auxiliary winding (2), big binding post (4) and little binding post (3) all are installed in the housing (6).
4, a kind of current transformer that two groups of signal outputs are arranged according to claim 3 is characterized in that described main winding (1) and auxiliary winding (2) are installed on the mounting bracket (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200383456U CN201213095Y (en) | 2008-07-01 | 2008-07-01 | Low-voltage current inductor having two groups of signal outputs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200383456U CN201213095Y (en) | 2008-07-01 | 2008-07-01 | Low-voltage current inductor having two groups of signal outputs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201213095Y true CN201213095Y (en) | 2009-03-25 |
Family
ID=40497273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200383456U Expired - Lifetime CN201213095Y (en) | 2008-07-01 | 2008-07-01 | Low-voltage current inductor having two groups of signal outputs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201213095Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872676A (en) * | 2010-06-18 | 2010-10-27 | 江苏安科瑞电器制造有限公司 | Low-voltage double-winding current sensor |
| CN105405626A (en) * | 2015-12-29 | 2016-03-16 | 无锡应达工业有限公司 | Current transformer of high-power and medium-high frequency power supply and winding method |
| CN107727917A (en) * | 2017-10-18 | 2018-02-23 | 江苏安科瑞电器制造有限公司 | Low-voltage open type double winding alternating current monitoring module |
-
2008
- 2008-07-01 CN CNU2008200383456U patent/CN201213095Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872676A (en) * | 2010-06-18 | 2010-10-27 | 江苏安科瑞电器制造有限公司 | Low-voltage double-winding current sensor |
| CN105405626A (en) * | 2015-12-29 | 2016-03-16 | 无锡应达工业有限公司 | Current transformer of high-power and medium-high frequency power supply and winding method |
| CN107727917A (en) * | 2017-10-18 | 2018-02-23 | 江苏安科瑞电器制造有限公司 | Low-voltage open type double winding alternating current monitoring module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090325 |