CN204556779U - High capacitance equipment Withstand test device - Google Patents
High capacitance equipment Withstand test device Download PDFInfo
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- CN204556779U CN204556779U CN201520266241.0U CN201520266241U CN204556779U CN 204556779 U CN204556779 U CN 204556779U CN 201520266241 U CN201520266241 U CN 201520266241U CN 204556779 U CN204556779 U CN 204556779U
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- withstand test
- high capacitance
- test device
- transformer
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- 238000012360 testing method Methods 0.000 title claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004804 winding Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
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Abstract
The utility model relates to a kind of high capacitance equipment Withstand test device, it is characterized in that it has the two spiral single transformers of the oil immersed type of air gap and the capacitive divider in parallel with it to form by iron circuit.Namely the utility model had both had transformer boost effect, also there is the effect that shunt reactor provides resonant inductance, calculating need not be carried out before test respectively select, disassembly and assembly are not needed in test, need not line be carried out, directly can connect other test connections and test, can effectively improve work on the spot efficiency, simple to operate, easy to use.
Description
Technical field
The utility model relates to a kind of parallel resonance Withstand test device, particularly a kind of high capacitance equipment Withstand test device.
Background technology
In electric field high-potting, for the AC voltage withstand test of the withstand voltage test especially cable of high capacitance equipment, usually parallel resonance device to be used, the exciting transformer of this apparatus main body, resonance reactor are split equipment, and each test will select exciting transformer and the resonance reactor of capacity suitable according to the electric capacity of tested cable.In testing ground, all to be connected with resonance reactor exciting transformer at every turn, affect work efficiency.And, if the electric cable capacitance amount parameter that provides of unit in charge of construction and cable actual capacitance parameter have deviation, the exciting transformer selected and resonance reactor off-capacity may be caused, can not testing requirements be met, AC voltage withstand test cannot be completed by regulatory requirements.
Summary of the invention
The purpose of this utility model is to overcome existing deficiency, provides a kind of high capacitance equipment Withstand test device being specifically designed to cable AC voltage withstand test.
The purpose of this utility model is achieved in that a kind of high capacitance equipment Withstand test device, it is characterized in that it has the two spiral single transformers of the oil immersed type of air gap and the capacitive divider in parallel with it to form by iron circuit.
The two spiral single transformer of described oil immersed type is connected with three-phase alternating-current supply by frequency changing power device.
Described capacitive divider is in parallel with tested device.
The iron circuit of the two spiral single transformer of oil immersed type has air gap, by regulating the length of iron circuit air gap, continually varying inductance is obtained at high voltage side of transformer, this inductance is used as the resonant inductance in shunt-resonant circuit, make the ground capacitance generation resonance of itself and tested device, complete AC voltage withstand test.
Namely the utility model had both had transformer boost effect, also there is the effect that shunt reactor provides resonant inductance, calculating need not be carried out before test respectively select, disassembly and assembly are not needed in test, need not line be carried out, directly can connect other test connections and test, can effectively improve work on the spot efficiency, simple to operate, easy to use.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2, Fig. 3 are the two spiral single transformer structural representations of the utility model oil immersed type.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, by iron circuit have the two spiral single transformer of the oil immersed type of air gap (3) and the capacitive divider in parallel with it (4) form, capacitive divider and tested device are (5) in parallel.(1) (2) the two spiral single transformer of oil immersed type be connected with three-phase alternating-current supply by frequency changing power device.
Three-phase alternating-current supply is connected to variable-frequency power sources and is connected to the two spiral single transformer low-pressure side of oil immersed type, as the power supply of whole resonant circuit, by the high-pressure side of the two spiral single transformer of oil immersed type for resonant tank provides trial voltage, now this transformer is equivalent to exciting transformer.Meanwhile, regulate the air gap of the two spiral monophase transformer core of oil immersed type, change the inductance value of this transformer high-voltage winding, form shunt-resonant circuit, now this transformer is equivalent to resonance reactor.Whole resonant tank is the approximate appearance sense antiresonant circuit jointly formed by the inductance value of transformer high-voltage winding and capacitive divider, test specimen cable electric capacity over the ground, utilizes the characteristic of antiresonant circuit to complete the demand of tested cable AC voltage withstand test.
Use of the present utility model is as Fig. 2, shown in 3, experiment power supply is provided by three-phase alternating-current supply, three-phase alternating-current supply is connected by power lead with variable-frequency power sources, the experiment power supply that three-phase alternating-current supply provides by variable-frequency power sources is converted to the single phase poaer supply of optional frequency in 40-200Hz, the low-pressure side of the two spiral single transformer of oil immersed type is supplied to by connecting wire, from the high-pressure side of transformer counter go out trial voltage be supplied to voltage divider and tested device (as cable), then changed by transformer core air gap and regulate the reactance of high pressure winding side and jointly shunt-resonant circuit is formed to the ground capacitance of voltage-dividing capacitor and tested device, complete the AC voltage withstand test of tested device.
Three-phase alternating-current supply is the power supply of 380V, 50Hz.
Variable-frequency power sources is made up of resistance, triode etc., and the three-phase alternating-current supply of 50Hz can be converted to the single phase poaer supply of optional frequency in 40-200Hz, usual voltage output range is 0-350V, and continuous working test is not less than 60min.
The two spiral single transformer of oil immersed type is the single transformer of the two spiral of oil immersed type, rated input power is 50kVA, low-pressure side nominal input voltage is 0-350V, input current is 142.8A, high-pressure side rated output voltage is 120kV, and output current is 18A, and inductance value is that 26-542 is prosperous, high-pressure side rated current 18A, frequency of utilization is 40-200Hz.
Capacitive divider rated voltage is 200kV, electric capacity 1000pF(high-pressure side), stream time is not less than 15 minutes, and no-load voltage ratio is 1000 times.
Claims (3)
1. a high capacitance equipment Withstand test device, is characterized in that it has the two spiral single transformers of the oil immersed type of air gap and the capacitive divider in parallel with it to form by iron circuit.
2. high capacitance equipment Withstand test device according to claim 1, is characterized in that the two spiral single transformer of described oil immersed type is connected with three-phase alternating-current supply by frequency changing power device.
3. high capacitance equipment Withstand test device according to claim 1, is characterized in that described capacitive divider is in parallel with tested device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520266241.0U CN204556779U (en) | 2015-04-29 | 2015-04-29 | High capacitance equipment Withstand test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520266241.0U CN204556779U (en) | 2015-04-29 | 2015-04-29 | High capacitance equipment Withstand test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204556779U true CN204556779U (en) | 2015-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520266241.0U Active CN204556779U (en) | 2015-04-29 | 2015-04-29 | High capacitance equipment Withstand test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204556779U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793116A (en) * | 2015-04-29 | 2015-07-22 | 国网辽宁省电力有限公司大连供电公司 | Voltage withstand test device for large-capacity equipment |
-
2015
- 2015-04-29 CN CN201520266241.0U patent/CN204556779U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793116A (en) * | 2015-04-29 | 2015-07-22 | 国网辽宁省电力有限公司大连供电公司 | Voltage withstand test device for large-capacity equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |