CN201066763Y - Combined arrester for compound resistance capacitance - Google Patents
Combined arrester for compound resistance capacitance Download PDFInfo
- Publication number
- CN201066763Y CN201066763Y CNU200720071003XU CN200720071003U CN201066763Y CN 201066763 Y CN201066763 Y CN 201066763Y CN U200720071003X U CNU200720071003X U CN U200720071003XU CN 200720071003 U CN200720071003 U CN 200720071003U CN 201066763 Y CN201066763 Y CN 201066763Y
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Abstract
The utility model discloses a composite resistance-capacitance combined arrester which comprises four arrester units and three discharge gap units, wherein, one ends of three arrester units are respectively connected with the lines of phase A, B and C of a protected device, the other ends are respectively connected with one ends of the discharge gap units, and the other ends of each discharge gap unit are all connected with a common point. One end of another arrester unit is connected with the common point, and the other end is grounded. The combined arrester also comprises three resistance-capacitance units which are respectively in parallel connection with two ends of each discharge gap unit. The utility model can be applied to a 3 to 35kv medium point non-effective grounding system to absorb and discharge the switching overvoltage resulting form the inductive load of a vacuum breaker and a contactor, and at the same time, the utility model has the function of lightning prevention and the function of interphase protection.
Description
Technical field
The utility model relates to a kind of overvoltage protection of three-phase electric power apparatus.
Background technology
Existing three-phase power protection equipment mainly is divided three classes.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 the function of tangible reduction overvoltage amplitude and lightning protection.Last class is that the simple parallel connection or the complicated wiring of lightning arrester and capacitance-resistance is compound; though this technology can realize certain integrated protection ability; but the wiring complexity, size is bigger than normal, is unfavorable for directly supporting with vacuum circuit-breaker, contactor in the complete sets of electric switchgears and control devices equipment in little space nearby.And because complex circuit, the technology controlling and process difficulty also is unfavorable for industrial and large-scale production.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the above-mentioned defective of prior art, provide a kind of simple in structure, and can realize the combined arrester of the compound capacitance-resistance of overvoltage protection and lightning protection simultaneously.
The technical scheme that the utility model adopted is: a kind of combined arrester of compound capacitance-resistance, comprise four lightning arrester unit and three discharging gap unit, wherein, one end of three lightning arrester unit is connected with A, B, the C phase line of protected equipment respectively, the other end links to each other with an end of each discharging gap unit respectively, and the other end of each discharging gap all is connected on the common point; One end of another lightning arrester unit is connected on the described common point, and other end ground connection is characterized in, this combined arrester also comprises three capacitor resistor units, and described three capacitor resistor units are connected in parallel on the two ends of each discharging gap unit respectively.
Adopted above-mentioned technical scheme, when the high-octane overvoltage of low amplitude value appearred in power equipment, the lightning arrester unit can play a protective role to capacitor resistor unit; When switching overvoltage appears in power equipment, capacitor resistor unit work, the utility model plays the effect of rc absorber; When power equipment is invaded by thunder and lightning, the discharging gap cell operation, the utility model can be realized the function of series gap combined arrester again.Thereby the utility model has been realized integrated protection effectively.In addition, the lightning arrester unit of ground connection is series spark gap not, and any capacitor resistor unit also not in parallel makes structure of the present utility model very simple.The utility model also has safe and reliable advantage.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present utility model;
Fig. 2 is a structural representation of the present utility model.
Embodiment
Fig. 1 is an electrical schematic diagram of the present utility model.As shown in the figure, the combined arrester of compound capacitance-resistance of the present utility model comprises four lightning arrester unit, three discharging gap unit and three capacitor resistor units.Wherein, an end of three lightning arrester unit 11 is connected with A, B, the C phase line of protected equipment respectively.Three capacitor resistor units 3 are connected in parallel on the two ends of three discharging gap unit 2 respectively.One end of each discharging gap unit 2 and each capacitor resistor unit 3 is connected with the other end of three lightning arrester unit 11 respectively, and the other end of each discharging gap unit 2 and each capacitor resistor unit 3 all is connected on the common point 0.One end of another lightning arrester unit 12 is connected on the common point 0, other end ground connection.Each capacitor resistor unit 3 is made of a resistor and a capacitor, and resistor is connected with capacitors in series; The other end of resistor is connected with an end of discharging gap unit 2, and the other end of capacitor is connected with common point 0.
The utlity model has following advantages:
1, four lightning arrester unit and three discharging gap unit directly constitute a combined arrester of being with series gap.Because the common point 0 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.11 series spark gap unit 2, lightning arrester unit, the resistor disc dividing potential drop that can effectively give lightning arrester unit 11 prevents that the too high appearance of resistor disc chargeability of lightning arrester unit 11 is aging in advance, influences stability in use.And the lightning arrester unit 12 of ground connection is owing to bear dividing potential drop hardly under the normal voltage, so the series spark gap unit does not help simplifying technology on the contrary, and the response time when improving overvoltage and occurring.
2, capacitor resistor unit 3 is in parallel with discharging gap unit 2, 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, frequent operation causes accumulating the problem of burning.
3, the utility model has been realized integrated protection effectively, and simple in structure, safe and reliable, is described as follows:
When the high-octane overvoltage of low amplitude value appears in power equipment (as harmonic wave), the utility model has prevented the accumulation damage of capacitor resistor unit 3 effectively because the existence of lightning arrester unit 11 will can not delay work;
When bigger overvoltage appears in power equipment (as switching overvoltage), 11 conductings of lightning arrester unit, but discharging gap unit 2 still do not work, and this product 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 power equipment, the dividing potential drop of capacitor resistor unit 3 of the present utility model will sharply rise, 2 work of guiding discharge gap element.The utility model becomes the series gap combined arrester of a standard.Lightning arrester passage by big discharge capacity discharges the lightning current that significant damage is arranged over the ground.
Fig. 2 shows assembling example of the present utility model.In a kind of preferred implementation, lightning arrester of the present utility model unit is the metal oxide arrester element.
The utility model can be used in medium-sized some non-effectively earthed system of 3～35kV, and the switching overvoltage that vacuum circuit-breaker, contactor are produced when cut-offfing inductive load absorbs and bleed off, has lightning protection function and alternate defencive function simultaneously concurrently.
Claims (3)
1. the combined arrester of a compound capacitance-resistance, comprise four lightning arrester unit and three discharging gap unit, wherein, one end of three lightning arrester unit is connected with A, B, the C phase line of protected equipment respectively, the other end links to each other with an end of each described discharging gap unit respectively, and the other end of each discharging gap all is connected on the common point; One end of another lightning arrester unit is connected on the described common point, and other end ground connection is characterized in that, described combined arrester also comprises three capacitor resistor units, and described three capacitor resistor units are connected in parallel on the two ends of each discharging gap unit respectively.
2. the combined arrester of compound capacitance-resistance as claimed in claim 1 is characterized in that, described lightning arrester unit is the metal oxide arrester element.
3. the combined arrester of compound capacitance-resistance as claimed in claim 1 is characterized in that, each described capacitor resistor unit is made of a resistor and a capacitor, and described resistor is connected with described capacitors in series; The other end of resistor is connected with an end of described discharging gap unit, and the other end of capacitor is connected with described common point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720071003XU CN201066763Y (en) | 2007-06-13 | 2007-06-13 | Combined arrester for compound resistance capacitance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720071003XU CN201066763Y (en) | 2007-06-13 | 2007-06-13 | Combined arrester for compound resistance capacitance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201066763Y true CN201066763Y (en) | 2008-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720071003XU Expired - Lifetime CN201066763Y (en) | 2007-06-13 | 2007-06-13 | Combined arrester for compound resistance capacitance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201066763Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545196A (en) * | 2012-02-10 | 2012-07-04 | 杨国华 | Multilayer discharge gap type surge protection device |
| CN102738774A (en) * | 2012-06-06 | 2012-10-17 | 河南省电力公司信阳供电公司 | Overvoltage protection capacitor device |
| CN103293400A (en) * | 2012-02-22 | 2013-09-11 | 国家电网公司 | Lightning arrester direct current test system |
| CN104600685A (en) * | 2015-01-05 | 2015-05-06 | 中国科学院等离子体物理研究所 | Overvoltage short-circuit protection device |
| CN105790075A (en) * | 2016-04-01 | 2016-07-20 | 西安交通大学 | Vacuum lightning protection gap device based on hollow cathode effect |
| WO2017129291A1 (en) * | 2016-01-29 | 2017-08-03 | Epcos Ag | Arrangement for diverting voltage surges |
-
2007
- 2007-06-13 CN CNU200720071003XU patent/CN201066763Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545196A (en) * | 2012-02-10 | 2012-07-04 | 杨国华 | Multilayer discharge gap type surge protection device |
| CN102545196B (en) * | 2012-02-10 | 2015-01-28 | 四川中光防雷科技股份有限公司 | Multilayer discharge gap type surge protection device |
| CN103293400A (en) * | 2012-02-22 | 2013-09-11 | 国家电网公司 | Lightning arrester direct current test system |
| CN103293400B (en) * | 2012-02-22 | 2016-04-13 | 国家电网公司 | Lightning arrester DC test system |
| CN102738774A (en) * | 2012-06-06 | 2012-10-17 | 河南省电力公司信阳供电公司 | Overvoltage protection capacitor device |
| CN104600685A (en) * | 2015-01-05 | 2015-05-06 | 中国科学院等离子体物理研究所 | Overvoltage short-circuit protection device |
| WO2017129291A1 (en) * | 2016-01-29 | 2017-08-03 | Epcos Ag | Arrangement for diverting voltage surges |
| CN105790075A (en) * | 2016-04-01 | 2016-07-20 | 西安交通大学 | Vacuum lightning protection gap device based on hollow cathode effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080528 |