CN104730431A - Partial discharge detector for detection of insulated electrical equipment - Google Patents
Partial discharge detector for detection of insulated electrical equipment Download PDFInfo
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- CN104730431A CN104730431A CN201410353917.XA CN201410353917A CN104730431A CN 104730431 A CN104730431 A CN 104730431A CN 201410353917 A CN201410353917 A CN 201410353917A CN 104730431 A CN104730431 A CN 104730431A
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- partial discharge
- discharge detector
- electrical equipment
- transformer
- insulated electrical
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Abstract
The invention relates to a partial discharge detector, in particular to a partial discharge detector for detection of insulated electrical equipment. The partial discharge detector for detection of the insulated electrical equipment comprises a transformer, a protective resistor, a coupling capacitor, a capacitive voltage divider, a waveform displayer, a voltmeter and a control power supply. The transformer is electrically connected with the waveform displayer, the voltmeter and the control power supply, the protective resistor is electrically connected between the transformer and the coupling capacitor, the capacitive voltage divider is connected to the coupling capacitor through a cable, and a testing piece is further connected to the capacitive voltage divider and arranged in an insulated box. The partial discharge detector has the advantages of being small in size and low in weight, is convenient to carry, is a powerful assistance tool for researching and developing a novel high-voltage electrotechnical product and improving product quality, and is an effective testing instrument for judging whether equipment is normal or not on site.
Description
Technical field
The present invention relates to Partial discharge detector, especially a kind of Partial discharge detector detected for insulated electrical equipment.
Background technology
Ultrasound wave be cannot the sound heard by people's ear, in other words, the frequency higher than more than 20KHz is the sound that people's ear cannot relate to.Exactly because this characteristic hyperacoustic, utilize this physical characteristics of ultrasound wave to carry out interleaving techniques diagnosis to equipment state, guarantee correct trend and the management of repair based on condition of component.
When producing shelf depreciation under trial voltage, pulse current is produced through coupling capacitance Ck, pulse signal is picked up to obtain by input block, after low noise enlarge leadingly, filter amplifier select required frequency band and main amplification, the elliptical scanning baseline of oscillography screen demonstrates discharge pulse, and also delivering to peak value of pulse table (table of logarithm) shows its peak value simultaneously.The working time of peak value of pulse table in each cycle of time window unit controls trial voltage, and during this period of time the display of display screen is highlighted, width and position can change, and further enhance antijamming capability.
PD meter is applicable to motor, transformer, mutual inductor, cable, sleeve pipe, electric capacitor, high-voltage switch gear, the partial discharge quantity test of the various high-voltage capacitor such as Zinc-Oxide Arrester, PD meter adopts giant-screen oscillatron, can clear observation discharge waveform, two gauge outfit display discharge capacity, PD meter has digital watch and pointer gauge outfit display PC value simultaneously.Can be more perfect in the PD meter design of existing insulated electrical equipment, using can be more convenient, can be more reliable in performance.
Summary of the invention
The technical problem to be solved in the present invention is: based on the problems referred to above, the invention provides a kind of Partial discharge detector detected for insulated electrical equipment.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of Partial discharge detector detected for insulated electrical equipment; comprise transformer, protective resistance, coupling condenser, capacitive divider, waveform oscilloscope, voltage table and control power supply; described transformer is connected with waveform oscilloscope, voltage table and control power electric; described protective resistance is electrically connected between transformer and coupling condenser; described capacitive divider is connected on coupling condenser by cable; capacitive divider is also connected with test block, and described test block is placed in insulation box.
Further, described waveform oscilloscope and voltage table are all placed on testing table.Waveform oscilloscope and voltage table are all placed on testing table, and one carrys out handled easily human users, and two can prevent dust, play a protective role.
Further, described insulation box offers opening.Insulation box offers opening, is convenient to putting into of test block, design insulated case can prevent the interference of outer bound pair test block, ensures the accuracy of test.
The invention has the beneficial effects as follows: the present invention has little, the lightweight advantage of volume, and it is easy to carry, the strong aid that it is research, development of new high voltage electric product and improves the quality of products also is the Validity Test instrument that whether normal on-the-spot judgment device is.
Accompanying drawing explanation
Below in conjunction with accompanying drawing embodiment, the present invention is further described.
Fig. 1 is structural representation of the present invention.
In figure: 1. transformer, 2. protective resistance, 3. coupling condenser, 4. capacitive divider, 5. waveform oscilloscope, 6. voltage table, 7. control power supply, 8. insulation box, 9. testing table, 81. openings.
Embodiment
The invention will be further described in conjunction with specific embodiments now, and following examples are intended to the present invention instead of limitation of the invention further are described.
A kind of Partial discharge detector detected for insulated electrical equipment as shown in Figure 1; comprise transformer 1, protective resistance 2, coupling condenser 3, capacitive divider 4, waveform oscilloscope 5, voltage table 6 and control power supply 7; transformer 1 and waveform oscilloscope 5, voltage table 6 and control power supply 7 and be electrically connected; protective resistance 2 is electrically connected between transformer 1 and coupling condenser 3; capacitive divider 4 is connected on coupling condenser 3 by cable; capacitive divider 4 is also connected with test block, and test block is placed in insulation box 8.
Further, waveform oscilloscope 5 and voltage table 6 are all placed on testing table 9.Waveform oscilloscope 5 and voltage table 6 are all placed on testing table 9, and one carrys out handled easily human users, and two can prevent dust, play a protective role.
Further, insulation box 8 offers opening 81.Insulation box 8 offers opening 81, be convenient to putting into of test block, design insulated case can prevent the interference of outer bound pair test block, ensures the accuracy of test.
During concrete enforcement, test block is positioned in insulation box 8, control power supply 7 and purify Control experiment voltage, transformer 1 provides trial voltage for testing and ensures that self is without shelf depreciation, discharge signal in system is coupled and is supplied to waveform oscilloscope 5 by coupling condenser 3, and waveform oscilloscope 5 display part discharge signal waveform, measures discharge capacity size simultaneously, voltage table 6 measures high-pressure side voltage in real time, and measures its peak value and effective value.Wherein protective resistance 2 protection test device preserves from when breakdown.Capacitive divider 4 provides measuring voltage for voltage table 6, and self is without shelf depreciation.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on instructions, must determine its technical scope according to right.
Claims (3)
1. the Partial discharge detector detected for insulated electrical equipment, it is characterized in that: comprise transformer (1), protective resistance (2), coupling condenser (3), capacitive divider (4), waveform oscilloscope (5), voltage table (6) and control power supply (7), described transformer (1) and waveform oscilloscope (5), voltage table (6) and control power supply (7) electrical connection, described protective resistance (2) is electrically connected between transformer (1) and coupling condenser (3), described capacitive divider (4) is connected on coupling condenser (3) by cable, (4) are also connected with test block with capacitive divider, described test block is placed in insulation box (8).
2. a kind of Partial discharge detector detected for insulated electrical equipment according to claim 1, is characterized in that: described waveform oscilloscope (5) and voltage table (6) are all placed on testing table (9).
3. a kind of Partial discharge detector detected for insulated electrical equipment according to claim 1, is characterized in that: described insulation box (8) offers opening (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353917.XA CN104730431A (en) | 2014-07-23 | 2014-07-23 | Partial discharge detector for detection of insulated electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353917.XA CN104730431A (en) | 2014-07-23 | 2014-07-23 | Partial discharge detector for detection of insulated electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104730431A true CN104730431A (en) | 2015-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410353917.XA Pending CN104730431A (en) | 2014-07-23 | 2014-07-23 | Partial discharge detector for detection of insulated electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104730431A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201464607U (en) * | 2009-09-10 | 2010-05-12 | 保定天威集团有限公司 | Detection circuit for partial discharge of capacitor |
| CN203849364U (en) * | 2014-04-30 | 2014-09-24 | 王敏 | Partial discharge detector used for detecting insulation electric appliance |
-
2014
- 2014-07-23 CN CN201410353917.XA patent/CN104730431A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201464607U (en) * | 2009-09-10 | 2010-05-12 | 保定天威集团有限公司 | Detection circuit for partial discharge of capacitor |
| CN203849364U (en) * | 2014-04-30 | 2014-09-24 | 王敏 | Partial discharge detector used for detecting insulation electric appliance |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150624 |