CN201118228Y - Combination type resistance-capacity protector capable of freely switching - Google Patents
Combination type resistance-capacity protector capable of freely switching Download PDFInfo
- Publication number
- CN201118228Y CN201118228Y CNU2007201263902U CN200720126390U CN201118228Y CN 201118228 Y CN201118228 Y CN 201118228Y CN U2007201263902 U CNU2007201263902 U CN U2007201263902U CN 200720126390 U CN200720126390 U CN 200720126390U CN 201118228 Y CN201118228 Y CN 201118228Y
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Abstract
The utility model relates to a combined resistance protection device which can freely switch, which comprises nonlinear resistances, discharging gaps, series resistances and switches. A plurality of nonlinear resistances are included, wherein, the upper end of one nonlinear resistance is connected with the ground, while the other nonlinear resistances are respectively connected with the phrase wires of protection equipment; the discharging gaps are connected with the series resistances, and the switches are arranged among the other nonlinear resistances and the discharging clearance and/or the series connected resistances. A plurality of discharging gaps and the series resistances are matched with the other nonlinear resistances; a first neutral wire is arranged among a plurality of discharging gaps and a second neutral wire is arranged among a plurality of series resistances. Meanwhile, the protection device is provided with the performance of a typical resistance absorber or a typical series clearance-combined lightning rod, and has the function of improving the working state of the circuit, weakening the high-frequency vibrating process, reducing the range value and gradient of the voltage and limiting the interval and grounding over-voltage.
Description
Technical field
The utility model relates to a kind of overvoltage protection of power equipment, is specifically related to a kind of composite type resistance-capacitance protection device that can free switching.
Background technology
In 3～35 kilovolts of system with non effectively earth ed neutral, absorb and during bleed off, the method for employing is very many in the switching overvoltage that vacuum circuit-breaker, contactor are produced when cut-offfing inductive load, get up to mainly contain following four classes method commonly used but sum up:
One class is pure lightning-arrest type, no matter only single or combined arrester all do not have tangible attenuate high frequency concussion process, reduces the ability of overvoltage steepness.
One class is pure capacitance-resistance type, no matter single-phase capacitance-resistance or composite type capacitance-resistance all do not have tangible reduction overvoltage amplitude, realizes having concurrently the function of lightning protection.
One class is the simple parallel connection of lightning arrester and capacitance-resistance, though this technology can realize certain integrated protection ability, size is bigger than normal, and the resistance burden is heavy fragile, is unfavorable in the complete sets of electric switchgears and control devices equipment in little space supporting with vacuum circuit-breaker, contactor nearby.
Last class is on simple basis in parallel, and the common part element is to improve the combined protective device of fail safe, reduction size.But this series products can not Validity Test combined arrester power-frequency sparkover voltage, and product export and acceptance test can't effectively be found accident potential, and safeguards also difficulty after the fault.
The utility model content
The purpose of this utility model is to provide a kind of composite type resistance-capacitance protection device that can free switching, and it can use as combined arrester or composite type rc absorber separately, and has the characteristics of high protectiveness, high fault verification.
Technical solution of the present utility model is:
A kind of composite type resistance-capacitance protection device that can free switching; comprise nonlinear resistance 1; discharging gap 2; series connection capacitance-resistance 3 and switch 4; described nonlinear resistance 1 is a plurality of; one of them nonlinear resistance 1 upper end ground connection; other a plurality of nonlinear resistances 1 are connected with the phase line of protected equipment respectively; the described discharging gap 2 and capacitance-resistance 3 parallel connections of connecting; described other nonlinear resistances 1 are provided with switch 4 with discharging gap 2 or/and connect between the capacitance-resistance 3; its special character is: described discharging gap 2 and series connection capacitance-resistance 3 are for a plurality of; itself and described nonlinear resistance 1 mate; be provided with first neutral line 5 between described a plurality of discharging gap 2, be provided with second neutral line 6 between described a plurality of series connection capacitance-resistances 3.
Above-mentioned nonlinear resistance 1 is four; three upper ends in described four nonlinear resistances 1 connect A, B, the C triple line of protected equipment; another nonlinear resistance 1 upper end ground connection all is four with the discharging gap 2 of its coupling with the capacitance-resistance 3 of connecting, and described switch 4 is six.
Between above-mentioned discharging gap 2 or series connection capacitance-resistance 3 and the nonlinear resistance 1, freely switch by switch 4.
The utlity model has more following advantages:
1, four nonlinear resistance elements and four discharging gap unit directly constitute a combined arrester of being with series gap.Because the common neutral of combined arrester is zero potential under normal voltage, when system normally moved, the phase utmost point was equivalent to needs and independently bears system voltage.Series gap can effectively be given phase electrode resistance sheet dividing potential drop, prevents that the too high appearance of phase electrode resistance sheet chargeability is aging in advance, influences stability in use.
2, Resistor-Capacitor Unit is connected in parallel on the gap, rather than it is in parallel with whole lightning arrester loop, can be implemented in the purpose that automatic control under the setting voltage inserts capacitance-resistance, prevent in the prior art since rc absorber to be subjected to harmonic effects more serious, the problem that frequent operation causes the resistance accumulation to be burnt.
3, the mode of connection of the utility model product, but effectively realized not only integrated protection but also can separately use, the characteristics of safe and reliable convenient test.
Description of drawings
Fig. 1 is the utility model structure principle chart.
The drawing reference numeral explanation:
1-nonlinear resistance, 2-discharging gap, the 3-capacitance-resistance of connecting, 4-switch, 5-first neutral line, 6-second neutral line.
Embodiment
A kind of three phase combined resistance-capacitance protection device that can free switching; comprise four nonlinear resistances 1; four discharging gaps 2; four series connection capacitance-resistances 3; and six switches 4; the A of 1 three protected equipment of upper end connection in the nonlinear resistance; B; the C triple line; another nonlinear resistance 1 upper end ground connection; four series connection capacitance-resistance 3 one ends are linked together by first neutral line 5; the other end is connected with nonlinear resistance 1; four discharging gap 2 one ends are linked together by second neutral line 6; the other end is connected with nonlinear resistance 1; six switches 4 are used to cut-off the tie point with three-phase nonlinear resistance 1; can free when being necessary switching capacitance-resistance or gap element, make product have the performance of typical rc absorber or typical series gap combined arrester.
When the high-octane overvoltage of low amplitude value appears in system (as harmonic wave), this protective device has effectively prevented the accumulation damage of capacitance-resistance because the existence of nonlinear resistance 1 will can not delay work.
When bigger overvoltage appears in system (as switching overvoltage), nonlinear resistance 1 conducting, but discharging gap 2 still do not work, and this protective device is equivalent to a rc absorber, can effectively reduce vibration frequency, changes circuit working state.
(invade as thunder and lightning) when very big overvoltage appears in system, this protective device capacitance-resistance part dividing potential drop will sharply rise, and work in the guiding discharge gap, become the series gap combined arrester of a standard.By the lightning arrester passage of big discharge capacity, will there be the lightning current of significant damage to discharge over the ground.
Six switches 4 and two existence that separate the neutral line, the use that product can be broken fully, a switching part just can be used as combined arrester or composite type rc absorber separately.Equally, when acceptance test, cut-off the part switch and just can effectively apply mechanically industry standard, test lightning arrester loop power-frequency sparkover voltage parameter respectively, and capacitance-resistance tank capacitance resistance parameter.For dispatching from the factory and routine maintenance when test, effectively find the degree of injury of product, on-call maintenance or replacing provide necessary foundation.
Claims (3)
- One kind can free switching composite type resistance-capacitance protection device; comprise nonlinear resistance (1); discharging gap (2); series connection capacitance-resistance (3) and switch (4); described nonlinear resistance (1) is a plurality of; one of them nonlinear resistance (1) upper end ground connection; other a plurality of nonlinear resistances (1) are connected with the phase line of protected equipment respectively; described discharging gap (2) and the capacitance-resistance of connecting (3) parallel connection; described other nonlinear resistances (1) with discharging gap (2) or/and be provided with switch (4) between the capacitance-resistance of connecting (3); it is characterized in that: described discharging gap (2) and series connection capacitance-resistance (3) are for a plurality of; itself and described nonlinear resistance (1) mate; be provided with first neutral line (5) between described a plurality of discharging gap (2), be provided with second neutral line (6) between described a plurality of series connection capacitance-resistances (3).
- 2. composite type resistance-capacitance protection device according to claim 1; it is characterized in that: described nonlinear resistance (1) is four; three upper ends in described four nonlinear resistances (1) connect A, B, the C triple line of protected equipment; another nonlinear resistance (1) upper end ground connection; all be four with the discharging gap (2) of its coupling with the capacitance-resistance of connecting (3), described switch (4) is six.
- 3. composite type resistance-capacitance protection device according to claim 1 and 2 is characterized in that: between described discharging gap (2) or series connection capacitance-resistance (3) and the nonlinear resistance (1), freely switch by switch (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201263902U CN201118228Y (en) | 2007-11-15 | 2007-11-15 | Combination type resistance-capacity protector capable of freely switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201263902U CN201118228Y (en) | 2007-11-15 | 2007-11-15 | Combination type resistance-capacity protector capable of freely switching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201118228Y true CN201118228Y (en) | 2008-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201263902U Expired - Fee Related CN201118228Y (en) | 2007-11-15 | 2007-11-15 | Combination type resistance-capacity protector capable of freely switching |
Country Status (1)
| Country | Link |
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| CN (1) | CN201118228Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508266A (en) * | 2017-09-14 | 2017-12-22 | 国网四川省电力公司电力科学研究院 | The controllable energy release device of high-voltage convertor station neutral bus and realizing controlled-release energy method |
| CN115377980A (en) * | 2022-10-25 | 2022-11-22 | 山东华天电气有限公司 | Active resonance suppression system, method and device for intermediate frequency furnace power distribution system |
-
2007
- 2007-11-15 CN CNU2007201263902U patent/CN201118228Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508266A (en) * | 2017-09-14 | 2017-12-22 | 国网四川省电力公司电力科学研究院 | The controllable energy release device of high-voltage convertor station neutral bus and realizing controlled-release energy method |
| CN107508266B (en) * | 2017-09-14 | 2020-06-02 | 国网四川省电力公司电力科学研究院 | Controllable energy release device and controllable energy release method for neutral bus of high-voltage converter station |
| CN115377980A (en) * | 2022-10-25 | 2022-11-22 | 山东华天电气有限公司 | Active resonance suppression system, method and device for intermediate frequency furnace power distribution system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20091215 |