CN101256907A - Non-arc breaking circuit based on variable capacitance and method thereof - Google Patents
Non-arc breaking circuit based on variable capacitance and method thereof Download PDFInfo
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- CN101256907A CN101256907A CNA2008100348353A CN200810034835A CN101256907A CN 101256907 A CN101256907 A CN 101256907A CN A2008100348353 A CNA2008100348353 A CN A2008100348353A CN 200810034835 A CN200810034835 A CN 200810034835A CN 101256907 A CN101256907 A CN 101256907A
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Abstract
The present invention provides a non-arc breaking current and method thereof based on variable capacity, which includes a main contact for switching a electric appliance, a auxiliary contact, a variable capacity, a current-limiting resistance, a auxiliary contacts, a variable capacitance and a secondary channel formed by the series current-limiting resistance, and the secondary channel is in parallel connection with the main contact. The main contact of the switch electric appliance is switching-off first for switching-on the shorted out ancillary circuit formerly, at the same time variable capacity is on high capacity condition, the capacitor is sufficient for controlling electric voltage lower than the minimum arcing voltage to avoid arc starting when the main contact is switching-off, subsequently, the variable capacity values are decrescent, and the contact potential at two terminal of the main contact raises, before the electric voltage reaches minimum arcing voltage, the main contact is disconnected completely for implementing non-arc disjunction, and the circuit is completely cut off until the auxiliary contact is cut off at certain time. The present invention has simple structure and advantages for using in direct current circuit and ac circuit.
Description
Technical field
The present invention relates to the non-arc breaking deenergizing and the method thereof in a kind of Electrical Control Technology field, relate in particular to a kind of non-arc breaking deenergizing and method thereof based on variable capacitance.
Background technology
The work of device for switching is to open or the disjunction operating circuit, the electric arc that when minute deenergizing, produces and extinguish the subject matter that faces when being device for switching work, capacity more then arc extinguishing is more difficult, so extinguish arcs is the center and the key point of device for switching technical problem.Existing device for switching is conceived to " arc extinguishing ", just when device for switching divides deenergizing to produce electric arc, manages to be extinguished.
Existing device for switching especially in the high-voltage great-current field, extensively adopts vacuum or SF in order to eliminate electric arc
6Arc-control device, this type of switch exist all that structure is numerous and jumbled, the shortcoming of maintenance difficult; On the other hand, the breaking capacity of device for switching such as circuit breaker is subjected to the restriction of arc extinguishing ability, switch is threaded off fail, and causes serious economy loss.
Find that through literature search patent (US7053739-B2) discloses a kind of novel non-arc breaking deenergizing and method thereof to prior art.This design adopts the parallel resistance group to come the transferred arc energy, reaches the purpose that fundamentally suppresses electric arc, thereby realizes the effect that non-arc breaking is disconnected, but this this body structure of method more complicated, and arc quenching effect also has limitation.
Summary of the invention
The present invention is directed to the existing in prior technology deficiency, a kind of non-arc breaking deenergizing and method thereof based on variable capacitance is provided, the electric arc that on main contacts and auxiliary contact, produces when making it can eliminate the branch deenergizing, and can safety, the electric arc that produces when effectively suppressing the disjunction of malfunction switch, fundamentally suppress the generation of electric arc, avoid the scaling loss of switch main contacts, reduce maintenance work.The present invention is a kind of non-arc breaking deenergizing and method thereof that can be used for the electric switch of alternative circuit breaker, on-load switch, contactor use.
The present invention is achieved by the following technical solution:
A kind of non-arc breaking deenergizing involved in the present invention based on variable capacitance, the main contacts, auxiliary contact, variable capacitance and the current-limiting resistance that comprise device for switching, auxiliary contact, variable capacitance and the current-limiting resistance formation accessory channel that is cascaded wherein, accessory channel is parallel to the two ends of the main contacts of device for switching.
Described accessory channel number is more than or equal to 1.
Described variable capacitance is used for the transferred arc energy, and main contacts is disconnected under minimum arc voltage.
The action of described auxiliary contact lags behind main contacts.
The resistance of described current-limiting resistance is more than or equal to zero.
The present invention both can be used for the disjunction DC circuit and also can be used for the disjunction alternating current circuit.
The disconnected method of a kind of non-arc breaking involved in the present invention based on variable capacitance, be specially: adopt above-mentioned circuit, the main contacts of device for switching disconnects earlier, made originally and connected by the auxiliary circuit of short circuit, at this moment, variable capacitance is in high-capacity state, capacitor is enough to suppress voltage under minimum arc voltage, the starting the arc when avoiding main contacts to disconnect, and variable capacitance constantly diminishes subsequently, main contacts two ends touch voltage constantly rises, before voltage reached minimum arc voltage, main contacts disconnected fully, realized that non-arc breaking is disconnected, thereafter disconnect up to a certain moment auxiliary contact, circuit cuts off fully.
Beneficial effect of the present invention: owing to adopt the disconnected device of the non-arc breaking of device for switching, switch no longer needs complicated arc-control device on the one hand, eliminates various malfunctions, tripping accident; On the other hand, can significantly reduce pitting of contacts, avoid damming and running accident jointly of switch, therefore can prolong the electrical endurance of switch main contacts system and overhaul life, assurance security appliance; Simultaneously, can also avoid the harm of switching overvoltage or power-frequency overvoltage to electric power system.Do not have numerous and jumbled, the arc-control device of easy care not of structure, help reducing switch volume, reduce operating cost, improve the reliability of electrical equipment.
Description of drawings
Fig. 1 circuit diagram of the present invention
An embodiment of Fig. 2 disjunction 220v of the present invention DC circuit
The voltage waveform of Fig. 3 disjunction 220v of the present invention DC circuit
An embodiment of Fig. 4 disjunction 380v of the present invention alternating current circuit
The voltage waveform of Fig. 5 disjunction 380v of the present invention alternating current circuit
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1.In the present embodiment, auxiliary contact 2, variable capacitance 3 and current-limiting resistance 4 are cascaded, and constitute accessory channel jointly, and then are together in parallel with main contacts 1, constitute complete arc extinguishing assembly, promptly described non-arc breaking deenergizing based on variable capacitance.
Described accessory channel number is more than or equal to 1.
Described variable capacitance 3 is used for the transferred arc energy, and main contacts 1 is disconnected under minimum arc voltage.
The action of described auxiliary contact 2 lags behind main contacts.
The resistance of described current-limiting resistance 4 is more than or equal to zero.
Fig. 2 and Fig. 3 have provided an embodiment of disjunction DC circuit of the present invention.Complete circuit shown in Figure 2 is made of DC power supply 6, load 5 and arc extinguishing assembly shown in Figure 1.Wherein, the voltage of DC power supply 6 is 220V, and load 5 is the resistance of one 10 Ω, variable capacitance 3 peak capacity 15F, current-limiting resistance 0.05 Ω.Fig. 3 has provided the disjunction waveform.Wherein, V
MinBe the minimum arc voltage of slider material, t1 represents to represent 1 opening time of main contacts, t2 2 opening times of auxiliary contact.As shown in Figure 3, the t1-t2 after main contacts 1 disconnects during this period of time in, main contacts 1 two ends touch voltage is in minimum arc voltage V
MinDown, avoided the main contacts starting the arc, thereby realized that non-arc breaking is disconnected.
Fig. 4 and Fig. 5 have provided an alternative embodiment of the invention.Complete circuit shown in Figure 4 is made of DC power supply 7, load 5 and arc extinguishing assembly shown in Figure 1.Wherein, the crest voltage of AC power 7 is 380V, and frequency is 60HZ, and load 5 is the resistance of one 5 Ω, and variable capacitance 3 peak capacities are 20F, and current-limiting resistance 4 is 0.05 Ω.Fig. 5 has provided the disjunction waveform.As shown in Figure 5, the t1-t2 after main contacts 1 disconnects during this period of time in, main contacts 1 two ends touch voltage is in minimum arc voltage V
MinDown, avoided main contacts 1 starting the arc, thereby realized that successfully non-arc breaking is disconnected.
Claims (7)
1. non-arc breaking deenergizing based on variable capacitance, the main contacts, auxiliary contact, variable capacitance, the current-limiting resistance that comprise device for switching, it is characterized in that: auxiliary contact, variable capacitance and the current-limiting resistance formation accessory channel that is cascaded, accessory channel is in parallel with main contacts.
2. the non-arc breaking deenergizing based on variable capacitance according to claim 1 is characterized in that: described accessory channel number is more than or equal to 1.
3. the non-arc breaking deenergizing based on variable capacitance according to claim 1 is characterized in that: the resistance of described current-limiting resistance is more than or equal to zero.
4. the non-arc breaking deenergizing based on variable capacitance according to claim 1, it is characterized in that: the action of described auxiliary contact lags behind main contacts.
5. the non-arc breaking deenergizing based on variable capacitance according to claim 1 is characterized in that: described variable capacitance transferred arc energy disconnects main contacts under minimum arc voltage.
6. the non-arc breaking deenergizing based on variable capacitance according to claim 1 is characterized in that: be applicable to disjunction DC circuit and disjunction alternating current circuit.
7. one kind based on the disconnected method of the non-arc breaking of variable capacitance, it is characterized in that: with the auxiliary contact of device for switching, variable capacitance and the current-limiting resistance formation accessory channel that is cascaded, accessory channel is in parallel with main contacts again, the main contacts of device for switching disconnects earlier, made originally and connected by the auxiliary circuit of short circuit, this moment, variable capacitance was in high-capacity state, capacitor is enough to suppress voltage under minimum arc voltage, the starting the arc when avoiding main contacts to disconnect, variable capacitance constantly diminishes subsequently, main contacts two ends touch voltage constantly rises, before voltage reached minimum arc voltage, main contacts disconnected fully, realized that non-arc breaking is disconnected, thereafter disconnect up to a certain moment auxiliary contact, circuit cuts off fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100348353A CN101256907B (en) | 2008-03-20 | 2008-03-20 | Non-arc breaking circuit based on variable capacitance and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100348353A CN101256907B (en) | 2008-03-20 | 2008-03-20 | Non-arc breaking circuit based on variable capacitance and method thereof |
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| CN101256907A true CN101256907A (en) | 2008-09-03 |
| CN101256907B CN101256907B (en) | 2010-12-01 |
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| CN2008100348353A Expired - Fee Related CN101256907B (en) | 2008-03-20 | 2008-03-20 | Non-arc breaking circuit based on variable capacitance and method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863956A (en) * | 2016-11-12 | 2018-03-30 | 广州市金矢电子有限公司 | Dynamic electrode arc-control device |
| CN109193599A (en) * | 2018-11-02 | 2019-01-11 | 李振奎 | A kind of ladder cuts unrestrained arc-suppressing method and extinguisher |
| CN109301804A (en) * | 2018-10-30 | 2019-02-01 | 大连理工大学 | A kind of variable impedance restrictor apparatus based on repulsive force mechanism |
| WO2020083323A1 (en) * | 2018-10-25 | 2020-04-30 | 郭桥石 | Arc-extinguishing apparatus |
| CN112491013A (en) * | 2020-11-19 | 2021-03-12 | 天津航空机电有限公司 | Manual arc-free breaking circuit applied to high-voltage direct-current circuit breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU853688A1 (en) * | 1979-09-21 | 1981-08-07 | Московский Ордена Ленина И Орденатрудового Красного Знамени Институтинженеров Железнодорожного Транспорта | Device for switching heavy-current dc circuits |
-
2008
- 2008-03-20 CN CN2008100348353A patent/CN101256907B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863956A (en) * | 2016-11-12 | 2018-03-30 | 广州市金矢电子有限公司 | Dynamic electrode arc-control device |
| CN107863956B (en) * | 2016-11-12 | 2021-04-13 | 广州市金矢电子有限公司 | Dynamic electrode arc-extinguishing device |
| WO2020083323A1 (en) * | 2018-10-25 | 2020-04-30 | 郭桥石 | Arc-extinguishing apparatus |
| CN112753085A (en) * | 2018-10-25 | 2021-05-04 | 郭桥石 | Arc extinguishing device |
| CN109301804A (en) * | 2018-10-30 | 2019-02-01 | 大连理工大学 | A kind of variable impedance restrictor apparatus based on repulsive force mechanism |
| CN109301804B (en) * | 2018-10-30 | 2019-10-29 | 大连理工大学 | A kind of variable impedance restrictor apparatus based on repulsive force mechanism |
| CN109193599A (en) * | 2018-11-02 | 2019-01-11 | 李振奎 | A kind of ladder cuts unrestrained arc-suppressing method and extinguisher |
| CN112491013A (en) * | 2020-11-19 | 2021-03-12 | 天津航空机电有限公司 | Manual arc-free breaking circuit applied to high-voltage direct-current circuit breaker |
| CN112491013B (en) * | 2020-11-19 | 2023-05-23 | 天津航空机电有限公司 | Manual arc-free breaking circuit applied to high-voltage direct-current breaker |
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| CN101256907B (en) | 2010-12-01 |
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