CN203552924U - Current transformer used for providing voltage signal for protection device - Google Patents
Current transformer used for providing voltage signal for protection device Download PDFInfo
- Publication number
- CN203552924U CN203552924U CN201320661445.5U CN201320661445U CN203552924U CN 203552924 U CN203552924 U CN 203552924U CN 201320661445 U CN201320661445 U CN 201320661445U CN 203552924 U CN203552924 U CN 203552924U
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- current transformer
- winding
- voltage signal
- protection
- protection device
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Abstract
The utility model relates to a current transformer used for providing a voltage signal for a protection device. The current transformer used for providing the voltage signal for the protection device comprises an insulation shell and is characterized in that a secondary protection shield is arranged at the top of the insulation shell; a powering winding, an insulation shielding layer and a protection winding are sequentially arranged in the insulation shell along the axial direction of the current transformer. The powering winding, the protection winding and the insulation shielding layer are integrally poured by epoxy resin. The current transformer used for providing the voltage signal for the protection device has the advantage that an input current signal is converted into the voltage signal in one part.
Description
Technical field
The utility model belongs to current transformer technical field, and relating in particular to a kind ofly provides the current transformer of voltage signal for protective device.
Background technology
The general output of traditional current transformer be ac current signal, and most of protective device need to obtain voltage signal and powers, and now just need to, at existing current transformer erection unit or circuit separately more outward, current signal be converted to voltage signal.But conversion equipment or circuit structure are more complicated, not only increased cost, also caused the complexity of system to rise, reliability decrease, can bring inconvenience to use.
Summary of the invention
The utility model provides a kind of for protective device provides the current transformer of voltage signal for solving the technical problem existing in known technology, and this current transformer can convert input current signal to voltage signal within parts.
The technical scheme that the utility model is taked for the technical problem existing in solution known technology is:
A kind ofly provide the current transformer of voltage signal for protective device; comprise insulation crust; it is characterized in that: the top of described insulation crust is provided with second protection cover; in described insulation crust along current transformer be axially provided with successively power supply winding, insulation screen and protection winding, described power supply winding, protection winding, insulation screen are integrated by poured with epoxy resin.
The utility model can also adopt following technical scheme:
Described power supply winding comprises the iron core as magnetic permeable material, outer enamelled wire and the resistance in parallel of being wound with unshakable in one's determination.
Advantage and the good effect that the utlity model has are:
The utility model has adopted after above technical scheme, and 1. power supply winding can directly be converted to voltage signal by input current signal, and assurance can provide the startup electric energy of protective device; 2. this current transformer structure is novel, and good looking appearance, has anti-stealing electricity function, easy-to-connect; 3. protection winding provides current signal, realizes little no-load voltage ratio, high accuracy, jumbo electric property; 4, this current transformer is easy to manufacture, and cost is low, easy to install and use, non-maintaining.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the right view of Fig. 1.
In figure: 1, second protection cover; 2, insulation crust; 3, power supply winding; 4, epoxy resin; 5, insulation screen; 6, protection winding.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 to Fig. 2; a kind ofly provide the current transformer of voltage signal for protective device; comprise insulation crust 2; the top of described insulation crust is provided with second protection cover 1; in described insulation crust along current transformer be axially provided with successively power supply winding 3, insulation screen 5 and protection winding 6, described power supply winding, protection winding, insulation screen are cast for one by epoxy resin 4.Described power supply winding comprises the iron core as magnetic permeable material, outer enamelled wire and the resistance in parallel of being wound with unshakable in one's determination.
Operating principle of the present utility model is:
This instrument transformer has the output of biquadratic winding, the iron core that the winding of wherein powering employing magnetic permeability is very high, saturation induction density is lower is as magnetic permeable material, by enamelled wire coiling, formed, a precision resister in parallel, by secondary lead wires, draw output voltage signal, for protective device provides enough startup electric energy; Power supply input for the protection of device, requires the load capacity of this winding to be not less than 5VA, and guaranteeing to provide protective device enough startup electric energy from little load current to short circuit current.Protection winding mainly provides current signal disengagement failure circuit to protective device, and the safety of protection electric power system has very high sensitivity and class of accuracy precision when little current ratio.Protection winding, can not be because distorted signals causes protecting tripping when short circuit current is larger for the protection of the protection sample rate current input of device.
Power supply winding 3 has good insulation shielding with protection between winding 6, and the nothing friction of colliding with between each winding realizes and between each winding, has good insulation protection.By the voltage signal values of the current transformer output after poured with epoxy resin, can not change, user can set corresponding with it no-load voltage ratio according to the different primary current of current transformer in protective device again.The voltage signal of output is stable, and accuracy is high, can avoid impact and the interference of external environment.
Although by reference to the accompanying drawings preferred embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not departing from the scope situation that the utility model aim and claim protect, can also make a lot of forms, within these all belong to protection range of the present utility model.
Claims (2)
1. one kind provides the current transformer of voltage signal for protective device; comprise insulation crust; it is characterized in that: the top of described insulation crust is provided with second protection cover; in described insulation crust along current transformer be axially provided with successively power supply winding, insulation screen and protection winding, described power supply winding, protection winding, insulation screen are integrated by poured with epoxy resin.
2. current transformer according to claim 1, is characterized in that: described power supply winding comprises the iron core as magnetic permeable material, outer enamelled wire and the resistance in parallel of being wound with unshakable in one's determination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320661445.5U CN203552924U (en) | 2013-10-25 | 2013-10-25 | Current transformer used for providing voltage signal for protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320661445.5U CN203552924U (en) | 2013-10-25 | 2013-10-25 | Current transformer used for providing voltage signal for protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203552924U true CN203552924U (en) | 2014-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320661445.5U Expired - Fee Related CN203552924U (en) | 2013-10-25 | 2013-10-25 | Current transformer used for providing voltage signal for protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203552924U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867666A (en) * | 2015-05-12 | 2015-08-26 | 山东电工电气集团智能电气有限公司 | Dry-type transformer high-voltage coil insulation structure |
-
2013
- 2013-10-25 CN CN201320661445.5U patent/CN203552924U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867666A (en) * | 2015-05-12 | 2015-08-26 | 山东电工电气集团智能电气有限公司 | Dry-type transformer high-voltage coil insulation structure |
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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: 20140416 Termination date: 20211025 |