CN204809874U - Low pressure electric capacity cabinet - Google Patents
Low pressure electric capacity cabinet Download PDFInfo
- Publication number
- CN204809874U CN204809874U CN201520524964.6U CN201520524964U CN204809874U CN 204809874 U CN204809874 U CN 204809874U CN 201520524964 U CN201520524964 U CN 201520524964U CN 204809874 U CN204809874 U CN 204809874U
- Authority
- CN
- China
- Prior art keywords
- branch road
- main circuit
- fuse
- harmonic
- reactor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Low pressure electric capacity cabinet is including setting up at the internal main circuit of being connected with three phase current of cabinet, the branch road on the main circuit of connecting in parallel, characterized by the main circuit include the switch -disconnector -fuse QU who is connected with three phase current, switch -disconnector -fuse QU's the lead wire of leading -out terminal pass through current transformer TA and be connected with the branch road, parallelly connected the setting to five of branch road, on the road in proper order the polyphone have fuse FU, contactor KM, reactor, the beneficial effects of the utility model are that condenser C has reached the restriction combined floodgate with the reactor series connection and has shoved and restrain two purposes of harmonic, can restrict the switching overvoltage, and the appointed higher harmonic of filtering restraines other subharmonic simultaneously and enlargies, voltage waveform distortion in the reduction electric wire netting, the time can not lead to the fact the mistake of relay protection and automatics to move because of the harmonic in the power supply, can not influence the power consumer product quality and with the normal use of electrical apparatus.
Description
Technical field
The utility model relates to electrical control cabinet technical field, is more particularly a kind of low-voltage capacitor box.
Background technology
Traditional low-voltage capacitor box is often installed in indoor; it acts on mainly compensating power; and China's electrical network uses 50Hz frequency; waveform is by the power supply of the three-phase symmetrical of sinusoidal rule change; and the existence of harmonic wave will impact the waveform of electrical network power frequency; it is made to be no longer sinusoidal wave; and make waveform that the non-sinusoidal waveform of distortion occur; the distortion of waveform can endanger the safe operation of electric equipment; cause the malfunction of relaying protection and automatics; affect the product quality of power consumer, even can affect the normal use of electrical appliance.
Summary of the invention
For solving the problem, the utility model devises one can harmonic inhabitation, the malfunction of relaying protection and automatics can not be caused because of harmonic wave when powering, the low-voltage capacitor box of the product quality of power consumer and the normal use of electrical appliance can not be affected, its technical scheme is: described low-voltage capacitor box comprises the main circuit being arranged on and being connected with three phase mains in cabinet, branch road on the main circuit in parallel, it is characterized in that described main circuit comprises the isolating switch fuse group QU be connected with three phase mains, the lead-in wire of the leading-out terminal of described isolating switch fuse group QU is connected with branch road by current transformer TA, described branch circuit parallel connection is set to five, described branch road is connected with successively fuse FU, contactor KM, reactor, and the leading-out terminal of described reactor is connected with capacitor C, and described capacitor C is that triangle connects, the capacitor C that reactor is connected with triangle contacts and can suppress the high order harmonic component of branch road, reduces switching overvoltage, fault restriction overcurrent, lightning arrester FV is connected with between described main circuit and branch road.
Contactor KM described in the utility model is switch-capacitor contactor, large bulk capacitance is larger to the charging current of electric capacity when being energized instantaneously, heavy current impact can be caused, circuit transships instantaneously, overload can blow fuse instantaneously, and electric capacity switching contactor, is then switched on power by internal delay time device to capacitor charging by current-limiting resistance, reduce the heavy current impact of circuit, prevent damaged line fuse etc.
The beneficial effects of the utility model are that in low-voltage capacitor box, capacitor C connects with reactor to reach and limits inrush phenomenon and harmonic inhabitation two objects, can Suppressing Switching Overvoltage, the high order harmonic component that filtering is specified, suppresses other subharmonic to amplify simultaneously, reduces voltage waveform distortion in electrical network; The malfunction of relaying protection and automatics can not be caused when powering because of harmonic wave, the product quality of power consumer and the normal use of electrical appliance can not be affected.
accompanying drawing illustrates:
Accompanying drawing 1 is the utility model cabinet internal wiring structural representation, in accompanying drawing 1:
1. main circuit, 2. branch road.
embodiment:
By reference to the accompanying drawings the utility model is described in further detail, so that the public grasps implementation method of the present utility model better, the utility model specific embodiment is: described low-voltage capacitor box, comprise and be arranged on the main circuit 1 be connected with three phase mains in cabinet, the branch road 2 be connected with main circuit 1, described main circuit 1 comprises the isolating switch fuse group QU be connected with three phase mains, and the lead-in wire of the leading-out terminal of described isolating switch fuse group QU is connected with branch road 2 by current transformer TA; It is five that described branch road 2 is arranged in parallel, and described branch road 2 is connected with successively fuse FU, contactor KM, reactor, and the leading-out terminal of described reactor is connected with capacitor C, and described capacitor C is that triangle connects; The capacitor C that reactor is connected with triangle contacts and can suppress the high order harmonic component of branch road, reduces switching overvoltage, fault restriction overcurrent; Lightning arrester FV is connected with between described main circuit 1 and branch road 2.
Contactor KM described in the utility model is switch-capacitor contactor, large bulk capacitance is larger to the charging current of electric capacity when being energized instantaneously, heavy current impact can be caused, circuit transships instantaneously, overload can blow fuse instantaneously, and electric capacity switching contactor, is then switched on power by internal delay time device to capacitor charging by current-limiting resistance, reduce the heavy current impact of circuit, prevent damaged line fuse etc.
The beneficial effects of the utility model are that in low-voltage capacitor box, capacitor C connects with reactor to reach and limits inrush phenomenon and harmonic inhabitation two objects, can Suppressing Switching Overvoltage, the high order harmonic component that filtering is specified, suppresses other subharmonic to amplify simultaneously, reduces voltage waveform distortion in electrical network; The malfunction of relaying protection and automatics can not be caused when powering because of harmonic wave, the product quality of power consumer and the normal use of electrical appliance can not be affected.
Claims (2)
1. low-voltage capacitor box, comprise and be arranged on the main circuit (1) be connected with three phase mains in cabinet, the branch road (2) be connected with main circuit (1), it is characterized in that described main circuit (1) comprises the isolating switch fuse group QU be connected with three phase mains, the lead-in wire of the leading-out terminal of described isolating switch fuse group QU is connected with branch road (2) by current transformer TA; It is five that described branch road (2) is arranged in parallel, and described branch road (2) is connected with fuse FU, contactor KM, reactor successively, and the leading-out terminal of described reactor is connected with capacitor C, and described capacitor C is that triangle connects; Lightning arrester FV is connected with between described main circuit (1) and branch road (2).
2. low-voltage capacitor box according to claim 1, is characterized in that described contactor KM is switch-capacitor contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520524964.6U CN204809874U (en) | 2015-07-20 | 2015-07-20 | Low pressure electric capacity cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520524964.6U CN204809874U (en) | 2015-07-20 | 2015-07-20 | Low pressure electric capacity cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204809874U true CN204809874U (en) | 2015-11-25 |
Family
ID=54594638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520524964.6U Expired - Fee Related CN204809874U (en) | 2015-07-20 | 2015-07-20 | Low pressure electric capacity cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204809874U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114518720A (en) * | 2022-02-21 | 2022-05-20 | 康体佳智能科技（深圳）有限公司 | Switch control method and related equipment |
-
2015
- 2015-07-20 CN CN201520524964.6U patent/CN204809874U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114518720A (en) * | 2022-02-21 | 2022-05-20 | 康体佳智能科技（深圳）有限公司 | Switch control method and related equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 Termination date: 20200720 |