CN204516568U - Type B residual current circuit breaker magnetic modulation type current transformer - Google Patents
Type B residual current circuit breaker magnetic modulation type current transformer Download PDFInfo
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- CN204516568U CN204516568U CN201520210845.3U CN201520210845U CN204516568U CN 204516568 U CN204516568 U CN 204516568U CN 201520210845 U CN201520210845 U CN 201520210845U CN 204516568 U CN204516568 U CN 204516568U
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Abstract
A kind of Type B residual current circuit breaker magnetic modulation type current transformer, belongs to low-voltage circuit breaker technical field.Comprise the housing that is configured with shell chamber; One for covering the cap protected to the accent in shell chamber; One is located in housing and the axial middle primary winding of cap; One is placed in the magnetic core in described shell chamber; One to be placed in described shell chamber and evenly close around the secondary coil on magnetic core, the initial head of secondary coil when coiling is as exit one, feature: described secondary coil to pull out the tap of or more as exit two according to certain number of turn relation from centre, described exit two is corresponding with described exit one.Advantage: overcome traditional unicoil magnetic modulation type current transformer shortcoming that on each gear, accuracy of detection is inconsistent when many gears residual current detection, for the residual current detecting 30mA level, there is higher accuracy of detection especially, and structure is simple, easy to make, realize easily, cost is lower.
Description
Technical field
The utility model belongs to low-voltage circuit breaker technical field, is specifically related to a kind of Type B residual current circuit breaker magnetic modulation type current transformer.
Background technology
The crucial detecting element of residual current circuit breaker is residual current transformer; its chief component is iron core and winding; winding is divided into a winding and secondary winding; one time winding is punching wire; flow through the electric current of protected circuit; once have people to get an electric shock or equipment leakage occurs, instrument transformer can produce voltage in secondary winding side, then by secondary winding, electric leakage signal is passed to follow-up link and carries out converting and amplifying.The effect of amplifier element is that the signal that residual current transformer secondary winding side exports is amplified, then is compared by the threshold value preset with comparing element, if residual electricity flow valuve exceedes threshold value, is then cut off the power supply of protected circuit by actuator.Under normal circumstances, in circuit, the vector of electric current is zero, there is not magnetic flux in current transformer, does not have signal to export.But along with increasing of power consumption equipment value volume and range of product, as frequency converter, inverter, ups system etc., the frequency and the form of equipment generation leak current fault constantly increase.The waveform of residual current signal, not only containing power frequency (even high frequency) simple alternating current, has also been mingled with pulsating direct current component, even smooth direct current component.When residual current contains DC component, residual current transformer secondary winding side can not induce the induced potential of expectation, and residual current circuit breaker is by cisco unity malfunction.If it is enough large that residual current contains DC component, residual current transformer will be made to enter saturation region, make residual current circuit breaker cisco unity malfunction equally.In order to avoid the appearance of above-mentioned situation, market there is a kind of unicoil magnetic modulation type residual current transformer, this current transformer operationally, is applied with periodic pumping signal in its Inside coil, can avoid occurring saturated phenomenon when residual current exists DC component.But along with electrical equipment develops to Intellectualized Tendency; residual current circuit breaker generally can have the protection range of 30mA ~ 1A; the gear that residual current protecting setting value also should have two grades or more is selected; and above-mentioned unicoil magnetic modulation type residual current transformer cannot ensure the consistent of accuracy of detection on each gear when many gears, the precision needs of the residual current detecting 30mA level especially cannot be met.For above-mentioned existing problems, also having at present and adopt the way of the multiple coil of coiling on magnetic core, completing switching between setting value gear by switching different coils, but complex structure, manufacture craft is loaded down with trivial details, and cost is high.
In view of this, be necessary to be improved the structure of existing magnetic mode current transformer.For this reason, the applicant has done actively and effectively to explore, and finally defines technical scheme described below.
Summary of the invention
Task of the present utility model to provide the Type B residual current circuit breaker magnetic modulation type current transformer that a kind of structure is simple, easy to make, realization is easy, cost is low, it has higher precision when detecting residual current, and when making many gears residual current detection, its accuracy of detection is consistent.
Task of the present utility model has been come like this, and a kind of Type B residual current circuit breaker magnetic modulation type current transformer, comprises the housing that is configured with shell chamber; One for covering the cap protected to the accent in shell chamber; One is located in housing and the axial middle primary winding of cap; One is placed in the magnetic core in described shell chamber; One to be placed in described shell chamber and evenly close around the secondary coil on magnetic core, the initial head of secondary coil when coiling is as exit one, it is characterized in that: described secondary coil to pull out the tap of or more as exit two according to certain number of turn relation from centre, described exit two is corresponding with described exit one.
In a specific embodiment of the present utility model, in the form of a ring, it is the middle busbar resigning hole one had for passing for described primary winding axially for described housing; In the form of a ring, it is the middle busbar resigning hole two had for passing for described primary winding axially, and described busbar resigning hole two is corresponding with described busbar resigning hole one for described cap.
In another specific embodiment of the present utility model, surrounding on described housing and around described busbar resigning hole is configured with an inner housing, and between the outer wall of described inner housing and the inwall of described housing, enclosure becomes to have the aforesaid shell chamber for holding magnetic core and secondary coil.
In another specific embodiment of the present utility model, described primary winding is punching busbar.
In another specific embodiment of the present utility model, described secondary coil is single core enamelled wire.
Also have in a specific embodiment of the present utility model, described magnetic core adopts the amorphous material with high magnetic permeability to make ring-type cylinder.
In an of the present utility model and then specific embodiment, described housing is provided with multiple metal connection post, one end of multiple metal connection post to probe into respectively in described shell chamber and with corresponding exit two and exit one electrical connection, it is outer and be electrically connected with outer treatment circuit that the other end of multiple metal connection post lays respectively at described housing.
The utility model is due to after employing said structure, the beneficial effect had: overcome traditional unicoil magnetic modulation type current transformer shortcoming that on each gear, accuracy of detection is inconsistent when many gears residual current detection, for the residual current detecting 30mA level, there is higher accuracy of detection especially, and structure is simple, easy to make, realize easily, cost is lower.
Accompanying drawing explanation
Fig. 1 is the stereochemical structure exploded view of the utility model one embodiment.
In figure: 1. housing, 11. shell chambeies, 12. wire bus resigning hole one, 13. inner housings, 14. metal connection posts; 2. secondary coil, 21. exit two, 22. exits one; 3. cap, 31. busbar resigning holes two; 4. magnetic core; 5. primary winding.
Embodiment
Technical spirit of the present utility model and beneficial effect can be fully understood in order to make the public; applicant will be described in detail embodiment of the present utility model below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, any changing in the form rather than substance according to the utility model design all should be considered as protection range of the present utility model.
Refer to Fig. 1, the utility model relates to a kind of Type B residual current circuit breaker magnetic modulation type current transformer, comprises the housing 1 that is configured with shell chamber 11; One for covering the cap 3 protected to the accent in shell chamber 11; One is located in housing 1 and the axial middle primary winding 5 of cap 3; One is placed in the magnetic core 4 in described shell chamber 11; One to be placed in described shell chamber 11 and evenly close around the secondary coil 2 on magnetic core 4, the initial head of secondary coil 2 when coiling is as exit 1, described secondary coil 2 to pull out the tap of or more as exit 2 21 according to certain number of turn relation from centre, described exit 2 21 is corresponding with described exit 1.
In the form of a ring, it is the middle busbar resigning hole 1 had for passing for described primary winding 5 axially for housing 1 described in the utility model.Be configured with an inner housing 13 on described housing 1 and around the surrounding of described busbar resigning hole 12, between the outer wall of described inner housing 13 and the inwall of described housing 1, enclosure becomes to have the aforesaid shell chamber 11 for holding magnetic core 4 and secondary coil 2.Described cap 3 in the form of a ring, its axially in the middle of there is busbar resigning hole 2 31 for passing for described primary winding 5, described busbar resigning hole 2 31 is with described busbar resigning hole 1 position is corresponding and size is identical.Described magnetic core 4 is a circular cylinder, and it adopts the amorphous material with high magnetic permeability to make, and the close magnetic core 4 around secondary coil 2 is packaged in cavity volume 11 by cap 3.Described primary winding 5 is the punching busbar through current transformer resigning hole 1, current transformer resigning hole 2 31.
Secondary coil 2 described in the utility model has external insulation layer, and secondary coil 2, according to certain number of turn relation, pulls out one or more tap corresponding with described exit 1 as exit 2 21 from centre.Described number of turn relation can be 200 circles or 300 circles.Adopt during described secondary coil 2 coiling evenly close around mode be wound on magnetic core 4, secondary coil 2 is single core enamelled wire, the utility model is for coiling 200 circle, 300 circles, first by enamelled wire with evenly close around mode coiling 200 circle on magnetic core 4, from 200 numbers of turn, using on enamelled wire insulating barrier reject after weldering a same material enamelled wire tap as exit 2 21, after having welded on weld recoats insulating barrier.Then continue to use original enamelled wire continue with evenly close around mode coiling 300 circle on magnetic core 4, after coiling completes, the tap of pull-out enamelled wire is as another exit 2 21.Initial head when enamelled wire starts coiling is as exit 1.Described is evenly close around referring to be wound on magnetic core 4 according to certain number of turn is equally distributed by enamelled wire, and head and the tail are close.
Described housing 1 is provided with multiple metal connection post 14, one end of multiple metal connection post 14 to probe into respectively in described shell chamber 11 and be electrically connected with corresponding exit 2 21 and exit 1, and the other end of multiple metal connection post 14 lays respectively at described housing 1 and be electrically connected with outer treatment circuit outward.
In order to ensure the precision detecting 30mA residual current, by secondary coil 2 according to the coil can selecting 200 circles when setting 30mA gear, to improve the frequency of excitation voltage, increase exciting curent, increase sampled signal, the accuracy of detection realized when many gears residual current detection on each gear is consistent.
Claims (7)
1.
a kind of Type B residual current circuit breaker magnetic modulation type current transformer, comprises the housing (1) that is configured with shell chamber (11); One for covering the cap (3) protected to the accent of shell chamber (11); One is located in housing (1) and the axial middle primary winding (5) of cap (3); One is placed in the magnetic core (4) in described shell chamber (11); One to be placed in described shell chamber (11) and evenly close around the secondary coil (2) on magnetic core (4), the initial head of secondary coil (2) when coiling is as exit one (22), it is characterized in that: described secondary coil (2) to pull out the tap of or more as exit two (21) according to certain number of turn relation from centre, described exit two (21) is corresponding with described exit one (22).
2.
type B residual current circuit breaker magnetic modulation type current transformer according to claim 1, it is characterized in that described housing (1) in the form of a ring, it is the middle busbar resigning hole one (12) had for passing for described primary winding (5) axially; Described cap (3) in the form of a ring, it is the middle busbar resigning hole two (31) had for passing for described primary winding (5) axially, and described busbar resigning hole two (31) is corresponding with described busbar resigning hole one (12).
3.
type B residual current circuit breaker magnetic modulation type current transformer according to claim 2, it is characterized in that described housing (1) is upper and surrounding around described busbar resigning hole (12) is configured with an inner housing (13), between the outer wall of described inner housing (13) and the inwall of described housing (1), enclosure becomes to have the aforesaid shell chamber (11) for holding magnetic core (4) and secondary coil (2).
4.
type B residual current circuit breaker magnetic modulation type current transformer according to claim 1, is characterized in that described primary winding (5) is punching busbar.
5.
type B residual current circuit breaker magnetic modulation type current transformer according to claim 1, is characterized in that described secondary coil (2) is for single core enamelled wire.
6.
type B residual current circuit breaker magnetic modulation type current transformer according to claim 1, is characterized in that described magnetic core (4) adopts the amorphous material with high magnetic permeability to make ring-type cylinder.
7.
type B residual current circuit breaker magnetic modulation type current transformer according to claim 1, it is characterized in that described housing (1) is provided with multiple metal connection post (14), one end of multiple metal connection post (14) to probe into respectively in described shell chamber (11) and is electrically connected with corresponding exit two (21) and exit one (22), and the other end of multiple metal connection post (14) lays respectively at described housing (1) and be electrically connected with outer treatment circuit outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520210845.3U CN204516568U (en) | 2015-04-09 | 2015-04-09 | Type B residual current circuit breaker magnetic modulation type current transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520210845.3U CN204516568U (en) | 2015-04-09 | 2015-04-09 | Type B residual current circuit breaker magnetic modulation type current transformer |
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| Publication Number | Publication Date |
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| CN204516568U true CN204516568U (en) | 2015-07-29 |
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| CN201520210845.3U Active CN204516568U (en) | 2015-04-09 | 2015-04-09 | Type B residual current circuit breaker magnetic modulation type current transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783115A (en) * | 2017-02-13 | 2017-05-31 | 安徽君华舜义恩佳非晶材料有限公司 | A kind of anti-DC component current transformer of double-iron core |
-
2015
- 2015-04-09 CN CN201520210845.3U patent/CN204516568U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783115A (en) * | 2017-02-13 | 2017-05-31 | 安徽君华舜义恩佳非晶材料有限公司 | A kind of anti-DC component current transformer of double-iron core |
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