CN2123809U - Load box for large capacity voltage mutual-inductor - Google Patents
Load box for large capacity voltage mutual-inductor Download PDFInfo
- Publication number
- CN2123809U CN2123809U CN 91220357 CN91220357U CN2123809U CN 2123809 U CN2123809 U CN 2123809U CN 91220357 CN91220357 CN 91220357 CN 91220357 U CN91220357 U CN 91220357U CN 2123809 U CN2123809 U CN 2123809U
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- load box
- inductor
- impedance
- utility
- model
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Abstract
The utility model discloses a load box for large capacity voltage mutual-inductor which belongs to the manufacture field of the load box of the mutual-inductor. The utility model comprises an electrical inductance coil, a resistance plate, a regulating switch, a lead wire, a box shell, etc. A power-wasting element is submerged in the transformer oil. A mouth-open ring-shaped rolled iron core is adopted to make the linear electrical inductance, and a plurality of impedance units are connected in series and are used to form the requisite impedance value. The utility model has the advantages of big capacity, easy impedance regulation, good linearity, flexible control and low cost.
Description
The utility model belongs to the manufacturing of instrument transformer load box
Existing voltage transformer load box has two kinds of forms usually, and a kind of is to utilize transformer principle to regulate the Z impedance by changing no-load voltage ratio, the FY-69 type of Shanxi Province's instrument transformer research institute for example, capacity 150VA, voltage power supply scope 85～115%; Another kind is the unit that is made of certain power factor an inductance and resistance, changes impedance by the number that changes unit in parallel, for example the experiment of Liaoning Province's metrical instrument the FY-60 type.The former inductance poor linearity, the voltage power supply scope is narrower satisfying under the prerequisite of accuracy requirement; Latter process's complexity, stock utilization is lower, uses also inconvenience.In addition, present load box all adopts air self cooling, owing to be subjected to the influence of its structure and radiating mode, the load box peak capacity of domestic manufacturing is 158VA only, needs nearly 10 load boxs when voltage transformer is carried out delivery test, and use, adjustment reach and be inconvenience.
The purpose of this utility model is to adopt new radiating mode, and linear inductance production method and the mode of regulating impedance make the separate unit capacity bring up to 800VA, and the voltage power supply scope can reach 20～150%, and reduces cost, handled easily.
This new load box mainly is made up of inductance coil, resistance board, by-pass cock, lead-in wire and case shell etc., and inductance coil and resistance board are dipped in the transformer oil, and its lead-in wire is drawn by binding post.Universal wheel is equipped with in the bottom, and the volume of load box depends on rated capacity.
The iron core of inductance coil adopts the annular of opening to roll iron core, is encased inside a slice insulation board in the opened gap, the long-pending rated capacity that depends on of gap length and core section.The fixedly employing Type B polyester of iron core opening process and opening post gap does not have the latitude band.The wire diameter of coiling inductance is taken at the operating current under the rated capacity, and current density is not more than 5A by every square millimeter and adjusts.
The impedance unit of an inductance and certain power factor of a resistance composition, load box is formed by more than ten such units in series.Each unit has tap, by regulating the position adjustments impedance of tap.Switch can separate with load box, is convenient to control switch is installed on the panel of operating desk.
The utility model has compared to existing technology that capacity is big, the impedance linearity is good, easy to adjust, control flexibly, the stock utilization advantages of higher.Ratio load box manufacturing cost in the past reduces about 50% under identical capacity, has obvious social and economic benefit.
The drawing of accompanying drawing is described as follows:
Fig. 1 is the profile of load box.1, by-pass cock, 2, handle, 3, sealed rubber, 4, lead-in wire, 5, pasta, 6, binding post, 7, inductance coil, 8, iron core, 9, resistance board, 10, the case shell, 11, universal wheel
Fig. 2 is the iron core schematic diagram of inductance coil.12, insulation board, 13, no latitude band.
Fig. 3 is the electric hookup of load box.14, inductance, 15, resistance.
Be the embodiment of a big capacity voltage transformer load box below.
Specification: 100/
V 500 300 150 125 75 37.5VA
100V 500 300 150 125 75 37.5VA
The length and width height of load box effective volume is 380 * 340 * 400mm
3
Iron core internal diameter φ 90, external diameter φ 140, the long 2mm in gap, the Type B polyester is respectively wrapped on the opening part both sides does not have 5 layers on latitude band, is with 5 layers along external diameter Bao Wuwei again behind the opening.
The wire diameter of the resistance value of each point and wrapped inductance is as follows respectively in the accompanying drawing 3:
Rated current wire diameter φ
L1＝4Ω R1＝5.33 8.7A 1.5mm
L2=L1+L2'=6.67Ω R2=R1+R2'
，=8.89Ω 5.2A 1.25mm
L3=L1+L'2+L'3=16Ω R3=R1+R'2+R3'=20Ω 5A 1.25mm
:
:
L12=L1+L'2+..+L'12 R12=R1+R2'+..+R'12 0.375A 0.4mm
=213.3Ω =266.7Ω
Claims (4)
1, a kind of big capacity voltage transformer load box comprises inductance coil, resistance board, by-pass cock, lead-in wire and case shell.It is characterized in that dissipative cell is dipped in the transformer oil.
2, load box according to claim 1 is characterized in that inductance coil adopts the annular of opening to roll iron core.
3, load box according to claim 1 is characterized in that by-pass cock can separate with load box; Universal wheel is equipped with in case shell bottom.
4, load box according to claim 1 is characterized in that load box is in series by the impedance unit of more than ten certain power factors, regulates impedance by the position of regulating tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91220357 CN2123809U (en) | 1991-09-17 | 1991-09-17 | Load box for large capacity voltage mutual-inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91220357 CN2123809U (en) | 1991-09-17 | 1991-09-17 | Load box for large capacity voltage mutual-inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2123809U true CN2123809U (en) | 1992-12-02 |
Family
ID=4927457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91220357 Granted CN2123809U (en) | 1991-09-17 | 1991-09-17 | Load box for large capacity voltage mutual-inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2123809U (en) |
-
1991
- 1991-09-17 CN CN 91220357 patent/CN2123809U/en active Granted
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |