CN203366986U - Electronic transformer with combination of notched iron core coil and coaxial capacitance - Google Patents
Electronic transformer with combination of notched iron core coil and coaxial capacitance Download PDFInfo
- Publication number
- CN203366986U CN203366986U CN 201320426461 CN201320426461U CN203366986U CN 203366986 U CN203366986 U CN 203366986U CN 201320426461 CN201320426461 CN 201320426461 CN 201320426461 U CN201320426461 U CN 201320426461U CN 203366986 U CN203366986 U CN 203366986U
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- iron core
- coil
- electronic transformer
- capacitance
- core coil
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Abstract
Disclosed is an electronic transformer with combination of a notched iron core coil and coaxial capacitance. The electronic transformer comprises a primary guide line, a capacitance plate, a metal shield, a coil winding, a coil iron core, a current sampling resistor, an aerial socket, an earthing bolt and an insulated case, and the electronic transformer is characterized in that an axial notch is formed in the coil iron core. According to the electronic transformer, a current transformer with a notched air gap iron core is used for measuring primary current, the magnetic saturation point is higher than that of a closed iron core, the coil can be used for measurement and protection simultaneously, the size and the weight are small, and the practicability is high; coaxial capacitance is used for measuring primary voltage, influences of stray capacitance are effectively eliminated, the anti-electromagnetic interference property is high, the stability is good, and the measuring accuracy is high.
Description
Technical field
The utility model relates to a kind of electric power mutual-inductor, particularly a kind of electronic mutual inductor with groove iron-core coil and coaxial capacitance combination.
Background technology
At present; in the combination transformer used at 10～35KV electrical network; the measure portion of electronic current mutual inductor wherein, protection part are generally to adopt respectively low power current transformer, two coils of air core coil; if measure portion and protection part are adopted to a low power current transformer; owing to there being the magnetic saturation problem; just need to increase core section long-pending, volume is large, and cost is high.Common electronic type voltage transformer is generally resistance or capacitance-voltage-distributing type structure, wherein in the electric resistance partial pressure type structure, adopt precision resistance voltage divider as sensing element, simple in structure, accuracy of measurement is high, volume is little, lightweight, but be subject to the restriction of resistor power and insulation, mainly be applied in the mesolow controller switching equipment of 10KV and 35KV grade, and the capacitance in the capacitance-voltage-distributing type structure easily is subject to the impact of ambient temperature and change, thereby the reduction accuracy of measurement, can reduce this impact although increase capacitance, will make its price and volume sharply increase.
Summary of the invention
The purpose of this utility model is in order to overcome above-mentioned weak point, and provides a kind of simple in structure, and volume is little, lightweight, and accuracy of measurement is high, the practical electronic mutual inductor with groove iron-core coil and coaxial capacitance combination.
The purpose of this utility model is achieved in that a kind of electronic mutual inductor with groove iron-core coil and coaxial capacitance combination, comprise wire, capacitor plate, metallic shield, coil windings, iron-core coil, current sampling resistor, aviation socket, earth stud, insulation shell, it is characterized in that on iron-core coil having axial notch.
The utility model is owing to adopting above architecture advances, have the axial notch air gap on iron-core coil in current transformer, when rated current, the section that magnetic flux does not almost all cut off from iron core passes through, effect and low power current transformer are much the same, have very little error; When the first short circuit electric current is quite large and be in transient process the time, the section that corresponding iron core does not cut off is significantly saturated, magnetic flux almost all passes through from iron core air gap, so just improved former iron core-closed saturation point, make it not occur when 20 times of rated current saturated, reflect exactly the current status of circuit.Therefore, utilize the characteristic of its groove air gap, realized only with a coil, making the function of measuring and protecting simultaneously, volume is little, lightweight, practical.In voltage transformer, between metallic shield and a wire, the ring-type capacitor plate is set, the three is coaxial, form respectively high-voltage arm electric capacity, low-voltage arm dividing potential drop electric capacity between them, metallic shield has played good shielding action to coaxial capacitance simultaneously, can effectively eliminate the impact of parasitic capacitance, and anti-electromagnetic interference performance is strong, good stability, accuracy of measurement is high.
The accompanying drawing explanation
Fig. 1 is the utility model example structure schematic diagram;
Fig. 2 is iron-core coil end face structure schematic diagram.
Embodiment
Now illustrated embodiment is made detailed description to the utility model by reference to the accompanying drawings.
As shown in Figure 1 and Figure 2, a kind of electronic mutual inductor with the combination of groove iron-core coil and coaxial capacitance, comprise wire 1, capacitor plate 2, metallic shield 3, coil windings 4, iron-core coil 5, insulation shell 6, current sampling resistor 7, electric current secondary lead wires 8, fairlead 9, aviation socket 10, voltage secondary lead wires 11, earth stud 12.Wherein on iron-core coil 5 inwalls, have axial notch 13, the degree of depth of groove 13 is 1/2 to 2/3 of iron core 5 radial thicknesss, between metallic shield 3 and a wire 1, ring-type capacitor plate 2 is set, the three is coaxial, form respectively high-voltage arm electric capacity between them, low-voltage arm dividing potential drop electric capacity, metallic shield 3 is connected with earth stud 12 through fairlead 9 by lead-in wire, the secondary wiring of coil windings 4 and current sampling resistor 7 and connect after, by electric current secondary lead wires 8, together with voltage secondary lead wires 11, through fairlead 9, with aviation socket 10, be connected, by epoxy resin, that each is zero, parts pour into an integrated entity, form insulation shell 6, aviation socket 10 is arranged on insulation shell 6 one sides.
Claims (1)
1. the electronic mutual inductor with the combination of groove iron-core coil and coaxial capacitance, comprise a wire (1), capacitor plate (2), metallic shield (3), coil windings (4), iron-core coil (5), current sampling resistor (7), aviation socket (10), earth stud (12), insulation shell (6), it is characterized in that on iron-core coil (5) having axial notch (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320426461 CN203366986U (en) | 2013-07-18 | 2013-07-18 | Electronic transformer with combination of notched iron core coil and coaxial capacitance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320426461 CN203366986U (en) | 2013-07-18 | 2013-07-18 | Electronic transformer with combination of notched iron core coil and coaxial capacitance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203366986U true CN203366986U (en) | 2013-12-25 |
Family
ID=49814713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320426461 Expired - Fee Related CN203366986U (en) | 2013-07-18 | 2013-07-18 | Electronic transformer with combination of notched iron core coil and coaxial capacitance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203366986U (en) |
-
2013
- 2013-07-18 CN CN 201320426461 patent/CN203366986U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20210718 |