CN208297596U - Current transformer and split-core type meter - Google Patents
Current transformer and split-core type meter Download PDFInfo
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- CN208297596U CN208297596U CN201821083505.9U CN201821083505U CN208297596U CN 208297596 U CN208297596 U CN 208297596U CN 201821083505 U CN201821083505 U CN 201821083505U CN 208297596 U CN208297596 U CN 208297596U
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Abstract
The utility model provides a kind of current transformer and split-core type meter, is related to power measurement field of tool, comprising: upper core, lower core, coil and bindiny mechanism, coil are sheathed on the outside of lower core, and upper core can be bent；The both ends of upper core and the both ends of lower core are connected by bindiny mechanism respectively, to form the closed hoop structure passed through for cable under test.Since the both ends of upper core can be separated with the both ends of lower core, and upper core can be bent, because even gap is very small between cable under test and adjacent cable, after upper core can also be with winding cable to be measured, it is connect again with lower core by bindiny mechanism, therefore, compared with prior art, current transformer provided by the utility model can realize the measurement for passing through electric current to cable under test in the case where smaller working space.
Description
Technical field
The utility model relates to power measurement field of tool, more particularly, to a kind of current transformer and split-core type meter.
Background technique
Low-voltage circuit current measurement is the important process of power operation maintenance personnel, by detecting the numerical value of three-phase current,
Judge the loading condition of route, the judgement that whether route overloads, whether route threephase load balances made according to measurement result,
Safe operation management work to power circuit, the energy-saving management work of route have important directive significance.
Currently, power operation maintenance personnel carries out the measurement of line current using tong-type ammeter, tong-type ammeter
Including current transformer and the ammeter being electrically connected with current transformer.The iron core of current transformer can when user clutches spanner
To open, the cable of route to be measured is passed through to the cyclic structure of current transformer, then unclamps spanner, iron core closure, it can
The electric current of cable under test is read on ammeter.
However, existing tong-type ammeter needs biggish space for its front end when measuring the electric current that cable passes through
Open type current transformer passes through, and the space of 50mm or more, and cable under test are at least needed minimum tong-type ammeter
Gap between the adjacent cable of left and right cannot be less than 15mm, and the work for being just able to satisfy the current transformer of tong-type ammeter is empty
Between, still, gap is very small between the cable in many distribution boxs, and existing tong-type ammeter can not pass through at all, leads to nothing
Method measures the electric current of cable under test.
Utility model content
The purpose of this utility model is to provide a kind of current transformer and split-core type meters, to solve Current Mutual Inductance in the prior art
Device needs that working space is larger, the problem of being unable to complete measurement by electric current to the cable of the smaller situation in gap between cable.
The utility model provides a kind of current transformer, comprising: upper core, lower core, coil and bindiny mechanism, the line
Snare is set to the outside of the lower core, and the upper core can be bent；
The both ends of the upper core pass through the bindiny mechanism with the both ends of the lower core respectively and connect, and are used for being formed
The closed hoop structure that cable under test passes through.
Wherein, the current transformer further includes insulating body, and the insulating body is provided with for accommodating the lower iron
The holding channel of core, the lower core are placed in the holding channel, and it is logical that the both ends of the upper core respectively penetrate the accommodating
It two ports in road and is abutted with the both ends of the lower core.
Specifically, the bindiny mechanism includes first clamping plate, second clamping plate and fastener；
The first clamping plate and the second clamping plate are respectively positioned in the holding channel, and the first clamping plate and described
Second splint is respectively arranged at the two sides of the upper core and the lower core junction, and the insulating body is located at the upper core
Connecting hole is offered on the side wall of the lower core junction, the fastener can be inserted in the connecting hole and described first
Clamping plate abuts, to be fixed the upper core and the lower core by the first clamping plate and the second clamping plate.
Further, the fastener includes screw rod and nut；
The nut is set on the side wall of the insulating body, and the screw rod is inserted in the connection by the nut
In hole, so that the screw rod is abutted with the first clamping plate.
When actual production manufactures, the upper core includes multiple first magnetic sheets, and multiple first magnetic sheets are successively bonded；Phase
The first insulating layer is provided on the binding face of two adjacent first magnetic sheets.
Further, the both ends of the upper core are equipped with protrusion；
The both ends of the lower core are provided with groove matched with the bulge.
Further, the lower core includes multiple second magnetic sheets, and multiple second magnetic sheets are successively bonded, and adjacent two
Second insulating layer is provided on the binding face of a second magnetic sheet.
Preferably, insulating sheath is arranged with outside the upper core.
Further, the both ends of the coil are separately provided for the first conducting wire connecting with ammeter and second and lead
One end of line, first conducting wire is connect with one end of the coil, and one end of second conducting wire is another with the coil
End connection；
The line outlet for first conducting wire, the second conducting wire other end stretching is offered on the insulating body.
Compared with the existing technology, current transformer provided by the utility model has following advantage:
Current transformer provided by the utility model is disassembled from lower core when in use, by upper core, by upper iron
Core bypasses cable under test, is then separately connected the both ends at the both ends of upper core and lower core by Liang Ge bindiny mechanism, so that
Cable under test wears the closed hoop structure that upper core and lower core are formed.
Since the both ends of upper core can be separated with the both ends of lower core, and upper core can be bent, because even to be measured
Gap is very small between cable and adjacent cable, after upper core can also be with winding cable to be measured, then with lower core pass through connection machine
Structure connection, therefore, compared with prior art, current transformer provided by the utility model can be the smaller working space the case where
It is lower to realize the measurement that electric current is passed through to cable under test.
The utility model also provides a kind of split-core type meter, and the split-core type meter includes ammeter and above-mentioned current transformer, the electric current
Table is equipped with anode interface and cathode interface, and the both ends of the coil are connected separately with the first conducting wire and the second conducting wire, and described the
One conducting wire is connect with the anode interface, and second conducting wire is connect with the cathode interface.
Possessed advantage is identical compared with the existing technology with above-mentioned current transformer for the split-core type meter, and details are not described herein.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of current transformer provided by the embodiment of the utility model；
Fig. 2 is cross-sectional view of the current transformer provided by the embodiment of the utility model along A-A；
Fig. 3 is the enlarged drawing in Fig. 1 at X；
Fig. 4 is cross-sectional view of the current transformer provided by the embodiment of the utility model along B-B.
Appended drawing reference:
1- upper core；The first magnetic sheet of 11-；12- protrusion；13- insulating sheath；2- lower core；The second magnetic sheet of 21-；
3- coil；The first conducting wire of 31-；The second conducting wire of 32-；4- bindiny mechanism；41- first clamping plate；42- second clamping plate；43-
Fastener；431- screw rod；432- nut；433- handle；5- insulating body；51- holding channel；52- connecting hole；53-
Line outlet.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
In the description of the present invention, it should be noted that such as occur term " center ", "upper", "lower", " left side ",
" right side ", "vertical", "horizontal", "inner", "outside", "front", "rear" etc., indicated by orientation or positional relationship for based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this is practical
Novel limitation.In addition, such as there is term " first ", " second ", " third " are used for description purposes only, and should not be understood as indicating
Or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Fig. 1 is the structural schematic diagram of current transformer provided by the embodiment of the utility model.
As shown in Figure 1, current transformer provided in this embodiment, comprising: upper core 1, lower core 2, coil 3 and connection machine
Structure 4, coil 3 are sheathed on the outside of lower core 2, and upper core 1 can be bent；The both ends of upper core 1 and the both ends of lower core 2 are distinguished
It is connected by bindiny mechanism 4, to form the closed hoop structure passed through for cable under test.
Compared with the existing technology, current transformer provided in this embodiment has following advantage:
Current transformer provided in this embodiment is disassembled from lower core 2 when in use, by upper core 1, by upper iron
Core 1 bypasses cable under test, is then separately connected the both ends of upper core 1 and the both ends of lower core 2 by Liang Ge bindiny mechanism 4,
So that cable under test wears the closed hoop structure that upper core 1 and lower core 2 are formed.
Since the both ends of upper core 1 can be separated with the both ends of lower core 2, and upper core 1 can be bent, because even to
It is very small to survey gap between cable and adjacent cable, after upper core 1 can also be with winding cable to be measured, then with lower core 2 passes through company
Connection mechanism 4 connects, and therefore, compared with prior art, current transformer provided by the utility model can be in smaller working space
In the case where realize electric current is passed through to cable under test measurement.
Fig. 3 is the enlarged drawing in Fig. 1 at X.
Wherein, safety when current transformer is used in order to ensure user, in current transformer provided in this embodiment,
As shown in Figure 1, current transformer further includes insulating body 5, insulating body 5 is provided with the holding channel for accommodating lower core 2
51, lower core 2 is placed in holding channel 51, the both ends of upper core 1 respectively penetrate two ports of holding channel 51 and with lower iron
The both ends of core 2 abut.
By lower core 2 being set in the holding channel 51 of insulating body 5, when using current transformer, Yong Huke
To hold 5 part of insulating body of current transformer, since lower core 2 charges, insulating body 5 can by user and electrical body every
It leaves, to realize the current measurement to cable under test in the case where guaranteeing user security.
Specifically, in order to ensure the both ends of upper core 1 and the both ends of lower core 2 can be stablized by bindiny mechanism 4 respectively
Ground connection, to form the closed hoop structure passed through for cable under test, in current transformer provided in this embodiment, such as Fig. 1
With shown in Fig. 3, bindiny mechanism 4 includes first clamping plate 41, second clamping plate 42 and fastener 43；First clamping plate 41 and second clamping plate 42
It is respectively positioned in holding channel 51, and first clamping plate 41 and second clamping plate 42 are respectively arranged at 2 junction of upper core 1 and lower core
Two sides, insulating body 5, which is located on the side wall of 2 junction of upper core 1 and lower core, offers connecting hole 52, and fastener 43 can plug
It is abutted in connecting hole 52 with first clamping plate 41, to be consolidated upper core 1 and lower core 2 by first clamping plate 41 and second clamping plate 42
It is fixed.
First clamping plate 41, second clamping plate 42 are insulation board, for example, plastic plate, rubber slab etc..
First clamping plate 41 and second clamping plate 42 is respectively set in the two sides of 2 junction of upper core 1 and lower core, passes through fastening
Part 43 is inserted in connecting hole 52 and abuts with first clamping plate 41, can as the depth that fastener 43 is inserted into connecting hole 52 is deeper and deeper
To play squeezing action to first clamping plate 41, so that the junction of upper core 1 and lower core 2 is by first clamping plate 41 and second clamping plate
42 squeeze fixation, so that upper core 1 and lower core 2 firmly be connected.
First clamping plate 41 and second clamping plate 42 are designed to insulation board, are made since fastener 43 is generally metal material,
It can directly contact and charge with upper core 1 and lower core 2 to avoid fastener 43, so that user's operation fastener 43 is to upper
Iron core 1 and lower core 2 are safer when carrying out squeezing fixed.
Further, it is abutted to allow fastener 43 to be inserted in connecting hole 52 with first clamping plate 41, with fastener
The depth of 43 insertion connecting holes 52 is deeper and deeper, so that the junction of upper core 1 and lower core 2 is pressed from both sides by first clamping plate 41 and second
Plate 42, which squeezes, to be fixed, so that upper core 1 and lower core 2 can be connected firmly, in current transformer provided in this embodiment, such as
Shown in Fig. 3, fastener 43 includes screw rod 431 and nut 432；Nut 432 is set on the side wall of insulating body 5, and screw rod 431 is logical
It crosses nut 432 to be inserted in connecting hole 52, so that screw rod 431 is abutted with first clamping plate 41.
When user wants for upper core 1 to connect with lower core 2, since screw rod 431 is threadedly coupled with nut 432, pass through
It is mobile towards 41 direction of first clamping plate can to make screw rod 431 for rotary screw 431, so that first clamping plate 41 is squeezed, so that the first folder
Spacing between plate 41 and second clamping plate 42 becomes smaller, until the junction of upper core 1 and lower core 2 is firmly squeezed into fixation,
And then connect upper core 1 and lower core 2 firmly.
When user wants to separate upper core 1 with lower core 2, counter rotating screws 431 are only needed, 431 direction of screw rod is made
It is mobile away from the direction of first clamping plate 41, so that the spacing between first clamping plate 41 and second clamping plate 42 becomes larger, thus by upper iron
Core 1 is separated with lower core 2.
Certainly, it in order to facilitate user's rotary screw 431, can be connected one end of separate first clamping plate 41 on screw rod 431
Handle 433, user holds 433 rotary screw 431 of handle can be more laborsaving.
Fig. 2 is cross-sectional view of the current transformer provided by the embodiment of the utility model along A-A.
Further, in order to make upper core 1 have preferably bendable folding endurance, and the magnetic conductivity and iron loss of upper core 1 simultaneously
The requirement of low-voltage cable current measurement can be met, in current transformer provided in this embodiment, as shown in Fig. 2, upper core 1 wraps
Multiple first magnetic sheets 11 are included, multiple first magnetic sheets 11 are successively bonded；It is respectively provided on the binding face of two adjacent the first magnetic sheets 11
There is the first insulating layer.
First insulating layer can be injection in the insulated paint on 11 binding face of the first magnetic sheet, or be adhered to the first magnetic
Insulating layer on 11 binding face of piece, certainly, the first insulating layer can also take other modes setting to the fitting of the first magnetic sheet 11
On face.
It will be provided with the first insulating layer on the binding face of two neighboring first magnetic sheet 11, interlayer can be prevented to be vortexed, kept away
Exempting from interlayer vortex causes upper core 1 to generate heat, and damages to current transformer.
The material of first magnetic sheet 11 can be permalloy, and permalloy is easy to be fabricated to soft bent band, have
Standby preferably magnetic conductivity, and iron loss is 2-3 times lower than silicon steel, can satisfy the requirement of low-voltage cable current measurement.
Fig. 4 is cross-sectional view of the current transformer provided by the embodiment of the utility model along B-B.
Further, ground stability, Current Mutual Inductance provided in this embodiment are connect in order to improve upper core 1 with lower core 2
In device, as shown in figure 4, the both ends of upper core 1 are equipped with protrusion 12；The both ends of lower core 2 are provided with and raised 12 phases
The groove of cooperation.
When the end of upper core 1 being connected with the end of lower core 2 by bindiny mechanism 4, the protrusion 12 of upper core 1 is inserted
In the groove for entering lower core 2, so that protrusion 12 is fitted closely with groove.
It is designed in this way, the contact area between upper core 1 and lower core 2 can be increased, thus in the effect of bindiny mechanism 4
Upper core 1 can be made to connect ground stability with the end of lower core 2 down more preferable.
Further, in order to make lower core 2 also have preferably magnetic conductivity, make the magnetic conductivity of lower core 2 and iron loss can
Meet the requirement of low-voltage cable current measurement, in current transformer provided in this embodiment, as shown in figures 1 and 3, lower core 2
Including multiple second magnetic sheets 21, multiple second magnetic sheets 21 are successively bonded, and are all provided on the binding face of two adjacent the second magnetic sheets 21
It is equipped with second insulating layer.
Second insulating layer can be injection in the insulated paint on 11 binding face of the first magnetic sheet.
It will be provided with second insulating layer on the binding face of two neighboring second magnetic sheet 21, interlayer can be prevented to be vortexed, kept away
Exempting from interlayer vortex causes lower core 2 to generate heat, and damages to current transformer.
The material of second magnetic sheet 21 can be permalloy, and permalloy has preferably magnetic conductivity, and magnetic conductivity compares silicon steel
It is tens times high, and iron loss is 2-3 times lower than silicon steel, can satisfy the requirement of low-voltage cable current measurement.
And 11 numbers of the first magnetic sheet of upper core 1 should be equal with 21 numbers of the second magnetic sheet of lower core 2, to ensure upper core
Preferably cooperate between 1 and lower core 2, the measurement that complete paired cable passes through electric current.
Preferably, safety when current transformer, current transformer provided in this embodiment are used in order to ensure user
In, as shown in figures 1 and 3, insulating sheath 13 is arranged with outside upper core 1.
Insulating sheath 13 can be heat-shrinkable T bush, to ensure that insulating sheath 13 has preferably bendable folding endurance, to make
Iron core 1 and insulating sheath 13 are provided with preferably bendable folding endurance, to allow current transformer in the feelings of smaller working space
The measurement that electric current is passed through to cable under test is realized under condition.
Further, in order to show that current transformer accurately on ammeter to the current values that cable measures
Show, in current transformer provided in this embodiment, as shown in Figure 1, the both ends of coil 3 are separately provided for connecting with ammeter
The first conducting wire 31 and the second conducting wire 32, one end of the first conducting wire 31 connect with one end of coil 3, one end of the second conducting wire 32 with
The other end of coil 3 connects；The outlet for the first conducting wire 31, the stretching of 32 other end of the second conducting wire is offered on insulating body 5
Mouth 53.
First conducting wire 31 is connect with the anode interface of ammeter, and the second conducting wire 32 is connect with the cathode interface of ammeter, from
And realize being electrically connected for current transformer and ammeter.It, can be with when the electric current that user power utilization current transformer detection cable passes through
Current values are accurately shown in ammeter.
Further, electric current is passed through to cable under test in order to realize split-core type meter in the case where smaller working space
Measurement, split-core type meter may include ammeter and above-mentioned current transformer, and ammeter is equipped with anode interface and cathode interface, coil
3 both ends are connected separately with the first conducting wire 31 and the second conducting wire 32, and the first conducting wire 31 is connect with anode interface, the second conducting wire 32 with
The connection of cathode interface.
Since the both ends of upper core 1 can be separated with the both ends of lower core 2, and upper core 1 can be bent, because even to
It is very small to survey gap between cable and adjacent cable, after upper core 1 can also be with winding cable to be measured, then with lower core 2 passes through company
Connection mechanism 4 connects, and therefore, split-core type meter can realize the measurement for passing through electric current to cable under test in the case where smaller working space.
Certainly, split-core type meter may include ammeter and three above-mentioned current transformers, set that there are three anode interfaces on ammeter
With three cathode interfaces, the conducting wire of each 3 both ends of current transformer coil connection respectively with an anode interface of ammeter
It is connected with a cathode interface, so that three current transformers be made to be electrically connected with ammeter.
When user wants the numerical value of detection three-phase current, three cables of three-phase current can be arranged in three respectively
The closed hoop structure of current transformer, to realize that the detection to three-phase current compared with prior art can be greatly simultaneously
Improve working efficiency.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of current transformer characterized by comprising upper core, lower core, coil and bindiny mechanism, the coil set
Set on the outside of the lower core, the upper core can be bent；
The both ends of the upper core pass through the bindiny mechanism with the both ends of the lower core respectively and connect, to be formed for be measured
The closed hoop structure that cable passes through.
2. current transformer according to claim 1, which is characterized in that further include insulating body, the insulating body is set
It is equipped with the holding channel for accommodating the lower core, the lower core is placed in the holding channel, and the two of the upper core
End respectively penetrates two ports of the holding channel and abuts with the both ends of the lower core.
3. current transformer according to claim 2, which is characterized in that the bindiny mechanism includes first clamping plate, second
Clamping plate and fastener；
The first clamping plate and the second clamping plate are respectively positioned in the holding channel, and the first clamping plate and second folder
Plate is respectively arranged at the two sides of the upper core and the lower core junction, and the insulating body is located at the upper core and institute
It states and offers connecting hole on the side wall of lower core junction, the fastener can be inserted in the connecting hole and the first clamping plate
It abuts, to be fixed the upper core and the lower core by the first clamping plate and the second clamping plate.
4. current transformer according to claim 3, which is characterized in that the fastener includes screw rod and nut；
The nut is set on the side wall of the insulating body, and the screw rod is inserted in the connecting hole by the nut
It is interior, so that the screw rod is abutted with the first clamping plate.
5. current transformer according to claim 1, which is characterized in that the upper core includes multiple first magnetic sheets, more
A first magnetic sheet is successively bonded；The first insulating layer is provided on the binding face of first magnetic sheet of adjacent two.
6. current transformer according to claim 1, which is characterized in that the both ends of the upper core are equipped with protrusion；
The both ends of the lower core are provided with groove matched with the bulge.
7. current transformer according to claim 1, which is characterized in that the lower core includes multiple second magnetic sheets, more
A second magnetic sheet is successively bonded, and is provided with second insulating layer on the binding face of second magnetic sheet of adjacent two.
8. current transformer according to claim 1, which is characterized in that be arranged with insulating sheath outside the upper core.
9. current transformer according to claim 2, which is characterized in that the both ends of the coil be separately provided for
The first conducting wire and the second conducting wire of ammeter connection, one end of first conducting wire connect with one end of the coil, and described the
One end of two conducting wires is connect with the other end of the coil；
The line outlet for first conducting wire, the second conducting wire other end stretching is offered on the insulating body.
10. a kind of split-core type meter, which is characterized in that including ammeter and such as the described in any item current transformers of claim 1-9,
The ammeter is equipped with anode interface and cathode interface, and the both ends of the coil are connected separately with the first conducting wire and second and lead
Line, first conducting wire are connect with the anode interface, and second conducting wire is connect with the cathode interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821083505.9U CN208297596U (en) | 2018-07-09 | 2018-07-09 | Current transformer and split-core type meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821083505.9U CN208297596U (en) | 2018-07-09 | 2018-07-09 | Current transformer and split-core type meter |
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| CN208297596U true CN208297596U (en) | 2018-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2018
- 2018-07-09 CN CN201821083505.9U patent/CN208297596U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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