CN208848690U - External current mutual inductor - Google Patents
External current mutual inductor Download PDFInfo
- Publication number
- CN208848690U CN208848690U CN201821167689.7U CN201821167689U CN208848690U CN 208848690 U CN208848690 U CN 208848690U CN 201821167689 U CN201821167689 U CN 201821167689U CN 208848690 U CN208848690 U CN 208848690U
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- Prior art keywords
- mutual inductor
- flange
- current mutual
- connection plate
- epoxy
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Abstract
The utility model discloses a kind of external current mutual inductors, including main casing, it is installed on the CT shield of the main casing periphery, the current mutual inductor coil being installed in the accommodating space formed between the CT shield and the main casing, the external mutual inductor also has the secondary terminal box for being installed on the CT shield, the secondary terminal box has the flange for being installed on the CT shield, it is installed on the epoxy secondary connection plate of the flange, it is contained in several equally distributed binding posts of the epoxy secondary connection plate, there is sealing ring between the flange and the epoxy secondary connection plate, sealing ring is installed between flange and epoxy secondary connection plate, secondary lead wires are sealed in terminal box, it is waterproof and dampproof.
Description
[technical field]
The utility model relates to send field of power transformation more particularly to a kind of external current mutual inductor.
[background technique]
GIS contains measurement grade for Cubicle Gas-Insulated Switchgear product with external current mutual inductor is mating
And protected level, make electric current, electric energy measurement and relay protection in AC electric power systems and is used.GIS external current mutual inductor
Mainly it is made of shell, CT shield, CT bottom plate, secondary outgoing line cover board, CT coil, insulation divided magnetic ring etc..
The characteristics of current transformer winding iron core material reasonably selects, and protected level uses silicon steel sheet, meets high saturation；Measurement
Grade uses amorphous ultramicro-crystal alloy, has the characteristics that high initial magnetoconductivity, can satisfy high-precision requirement.Current transformer around
Group wrapping insulating materials uses composite polyester film moisture-proof, resistant to high temperature, and temperature classification is at E grades or more, and outermost layer is using anti-
Water barrier material package can satisfy harsh environment requirement.Current transformer winding is directly bonded in shell using CT adhesive
On body, an entirety is become, housing outer surface sandblasting enhances the adhesive property of adhesive.The casting of current transformer winding
After on product shell, CT winding and shell are finally cured as an entirety, CT winding will not because external force, mechanical oscillation or
The factors such as not firm are installed and occur loosening the possibility of dislocation, the overall mechanical properties of product are superior.Product can satisfy a variety of
Mounting means, by the way of epoxy casting, not by any external force in CT winding During Process of Long-term Operation, it is ensured that CT around
The long time stability operation of group.
The secondary lead-out wire of current mutual inductor coil is drawn by different modes, is had according to the integrally-built difference of product
Directly led out by the way of directly lengthening the secondary lead-out wire of current mutual inductor coil, also have and drawn by the way of terminal block
Out, also the mode of useful plug-in connector is drawn.Using the above several ways, current transformer winding often will appear secondary draw
Outlet dampness insulation resistance is exceeded；Pigtail splice loose or dislocation, second open circuit occur, Keep Clear-High Voltage；Product terminal row over the ground and
The problem of current transformer insulation between coils are unsatisfactory for standard requirements.
Therefore it provides the problem of a kind of improved external current mutual inductor is this field urgent need to resolve.
[utility model content]
In view of the above-mentioned problems, providing a kind of external current mutual inductor, secondary lead wires are now effectively sealed the utility model, are prevented
Water dampproof effect is good.
To solve the above-mentioned problems, a kind of external current mutual inductor provided by the utility model, including main casing, installation
In the main casing periphery CT shield, be installed in the accommodating space formed between the CT shield and the main casing
Current mutual inductor coil, the external mutual inductor also has a secondary terminal box for being installed on the CT shield, described two
Secondary terminal box has the flange for being installed on the CT shield, the epoxy secondary connection plate for being installed on the flange, is contained in institute
Several equally distributed binding posts for stating epoxy secondary connection plate have close between the flange and the epoxy secondary connection plate
Seal.
Further, the flange has container, installs the epoxy secondary connection plate to the flange surrounding
Several fasteners.
Further, the fastener is screw, and the epoxy secondary connection plate surrounding has and the screw fit
Through-hole, the flange have the threaded hole positioned at its surrounding, and the screw passes through the through-hole and will with threaded hole cooperation
The epoxy secondary connection plate is installed to the flange.
Further, the binding post through the epoxy secondary connection plate and extends the flange.
Further, the external current mutual inductor has from the outwardly extending protection bottom plate of the main casing, described
Protection bottom plate is installed together with the main casing.
Further, the binding post has bolt, the screw thread on the binding post, and current mutual inductor coil has
Lead, the lug plate positioned at the lead free end, the through-hole on the lug plate, the excessively described lug plate of the binding post
On through-hole.
Furthermore the external current mutual inductor in the utility model, has several advantages that
1. sealing ring is installed between flange and epoxy secondary connection plate, secondary lead wires are sealed in terminal box, waterproof
It is moisture-proof.
2. there is through-hole be installed on the lug plate of secondary lead wires after the binding post to consolidate the lug plate by bolt
It is scheduled on the binding post, wiring is secured, it is not easy to fall off.
3. the binding post on the epoxy secondary connection plate is evenly distributed, avoid product terminal row over the ground and Current Mutual Inductance
The problem of device insulation between coils are unsatisfactory for standard requirements.
[Detailed description of the invention]
Fig. 1 is the external current mutual inductor structural schematic diagram of the utility model.
Fig. 2 is the enlarged drawing at the external current mutual inductor A in Fig. 1.
[specific embodiment]
Referring to shown in Fig. 1 to Fig. 2, giving the structural schematic diagram of external current mutual inductor in the utility model.
External current mutual inductor includes cylindrical main casing 1, the CT for being installed on 1 periphery of main casing
(Currenttransformer, current transformer) shield 2, from 1 bottom of main casing, outwardly extending CT protects bottom plate 4, institute
Stating has accommodating space between shield 2 and main casing 1, the external current mutual inductor, which has, is installed on the accommodating space
In several current mutual inductor coils 3, the current mutual inductor coil 3 is connected to one by CT adhesive 5 with the main casing 1
It rises, the CT shield 2 is fixed together with the protection bottom plate 4.The CT shield is connected with secondary terminal box, institute
State the epoxy secondary connection plate that secondary terminal box has the flange 6 being welded on the CT shield 2, is installed on the flange 6
8, it is contained in the binding post of the epoxy secondary connection plate 8, the flange 6 has container and is located at the mounting hole of its surrounding,
The epoxy secondary connection plate 8 is installed on described by the surrounding of the epoxy secondary connection plate by screw 9 and mounting hole cooperation
Flange 6, the binding post is through the epoxy secondary connection plate 8 and stretches out the flange 6, and the secondary terminal box also has position
The binding post is sealed in institute by the sealing ring 7 between 8 surrounding of epoxy secondary connection plate and flange, the sealing ring 7
The inside of external current mutual inductor is stated, it is waterproof and dampproof.Have on bolt and the binding post on the binding post and be threadedly engaged,
When needing for secondary lead wires to be connected on binding post, bolt is dismantled from the binding post, and secondary lead wires have flat, flat
On through-hole be set on the binding post, then the bolt is then connected to the binding post, secondary lead wires and the wiring
Column stable connection.The binding post is uniformly distributed on the epoxy secondary connection plate, avoids product terminal row over the ground and electricity
The problem of current transformer insulation between coils are unsatisfactory for standard requirements.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (6)
1. a kind of external current mutual inductor, including main casing (1), the CT shield (2) that is installed on the main casing periphery, peace
Loaded on the current mutual inductor coil (3) in the accommodating space formed between the CT shield and the main casing, feature exists
In the external mutual inductor also has the secondary terminal box for being installed on the CT shield (2), and the secondary terminal box has
It is installed on the flange (6) of the CT shield, the epoxy secondary connection plate (8) for being installed on the flange (6), is contained in the ring
Several equally distributed binding posts of oxygen secondary connection plate (8) have close between the flange and the epoxy secondary connection plate
Seal (7).
2. external current mutual inductor according to claim 1, which is characterized in that the flange has container, by institute
State several fasteners of epoxy secondary connection plate (8) installation to the flange surrounding.
3. external current mutual inductor according to claim 2, which is characterized in that the fastener is screw, the ring
Oxygen secondary connection plate (8) surrounding has the through-hole with the screw fit, and the flange has the threaded hole positioned at its surrounding, institute
Screw is stated to install the epoxy secondary connection plate (8) to the flange (6) across the through-hole and with threaded hole cooperation.
4. external current mutual inductor according to claim 1, which is characterized in that the binding post runs through the epoxy two
Secondary terminal plate (8) simultaneously extends the flange (6).
5. external current mutual inductor according to claim 1, which is characterized in that the external current mutual inductor has
From the outwardly extending protection bottom plate (4) of the main casing, the protection bottom plate is installed together with the main casing.
6. external current mutual inductor according to claim 1, which is characterized in that the binding post has bolt, is located at
Screw thread on the binding post, current mutual inductor coil have lead, positioned at the lead free end lug plate, be located at it is described
Through-hole on lug plate, the through-hole on the excessively described lug plate of the binding post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821167689.7U CN208848690U (en) | 2018-07-23 | 2018-07-23 | External current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821167689.7U CN208848690U (en) | 2018-07-23 | 2018-07-23 | External current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208848690U true CN208848690U (en) | 2019-05-10 |
Family
ID=66353602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821167689.7U Active CN208848690U (en) | 2018-07-23 | 2018-07-23 | External current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208848690U (en) |
-
2018
- 2018-07-23 CN CN201821167689.7U patent/CN208848690U/en active Active
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