CN202888955U - Lightning protection and double-alternating-current power switching device - Google Patents
Lightning protection and double-alternating-current power switching device Download PDFInfo
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- CN202888955U CN202888955U CN 201220618017 CN201220618017U CN202888955U CN 202888955 U CN202888955 U CN 202888955U CN 201220618017 CN201220618017 CN 201220618017 CN 201220618017 U CN201220618017 U CN 201220618017U CN 202888955 U CN202888955 U CN 202888955U
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Abstract
The utility model discloses a lightning protection and double-alternating-current power switching device. The power switching device comprises a shell and a PCB (printed circuit board) circuit board arranged in the shell, wherein the PCB circuit board comprises a lightning protection filtering module, a double-way switching module and a current limiting module, one end of the lightning protection filtering module is connected with a power input circuit, and the other end of the lightning protection filtering module is connected with the input end of the double-way switching module; and a normal close output end of a double-way module is connected with a first power output circuit, a normal open output end of the double-way switching module is connected with a second power output circuit, and the current limiting module is arranged in a circuit of the second source output circuit. The lightning protection and double-alternating-current power switching device provided by the utility model not only provides a ''1+1'' power source for a power distribution terminal, guarantees the terminal not to stop to operate, effectively avoids that the relay is overburnt because of the switchover of the relay so as to generate a failure condition, and improve the security level of a distribution network; and the lightning protection and double-alternating-current power switching device provided by the utility model provided by the utility model has the advantages that the power switching device is safe and reliable, the use is convenient, and the power switching device is suitable for working power supply protection and dual power supply switchover of the 10 kV power distribution terminal.
Description
Technical field
The utility model relates to a kind of distribution terminal apparatus for protecting power supply, specifically a kind of anti-lightning strike and double cross stream power transfer device.
Background technology
In power distribution network, most of distribution terminals are in outdoor, need to have the ability of the various natural calamities of opposing.Thunder and lightning is the very common phenomenon that has destructive power of occurring in nature, and this has proposed very high lightning protection and power supply reliability requirement to distribution terminal.During engineering is used at present, adopt lightning protection device to add the mode of power relay more, carry out power protection and switching, the nominal load of power relay is AC220V/10A, adopts this mode to switch, and has very large potential safety hazard.When double loop power supply can output when not switching between the in-phase voltage up to the 28A/5ms impulse current, cause relay contact to burn, even transfer relay blast, bring the terminal power system failure and can't work, the electrical network of partial dependency terminal normal operation then can produce power failure, brings heavy losses to the user.When more serious, the relay blast can cause the PT second short circuit, causes 10kv line fault.
The utility model content
The deficiency that exists for overcoming above-mentioned prior art, the utility model provides a kind of anti-lightning strike and double cross stream power transfer device, it not only can effectively prevent thunderbolt, and can avoid relay to produce excessive impulse current in the two-way handoff procedure causing relay to burn the generation of phenomenon.
The technical scheme in the invention for solving the technical problem is: a kind of anti-lightning strike and double cross stream power transfer device, comprise housing and be arranged on the interior PCB circuit board of housing, it is characterized in that, described PCB circuit board comprises the lightning protection filtration module, two-way handover module and current limliting module, described lightning protection filtration module one end is connected with the power input line road, the other end is connected with the input of two-way handover module, the normally closed output of described two-way module and the first power supply output line road, the output of often opening of two-way handover module is connected with the second source outlet line, and described current limliting module is arranged in the circuit of second source outlet line.Preferably, described PCB circuit board comprises high-tension resistive ARR1, high-tension resistive ARR2, piezo-resistance NTR1, piezo-resistance NTR2, capacitor C 1, capacitor C 2, two-way transfer relay J and current-limiting resistance R, described high-tension resistive ARR1, high-tension resistive ARR2, piezo-resistance NTR1, piezo-resistance NTR2, capacitor C 1 and capacitor C 2 form the lightning protection filter circuit, described two-way transfer relay J comprises tangent line circle JM, change switch JK1 and diverter switch JK2, the end of described high-tension resistive ARR1 is connected with power input line road L, the other end is connected an end with an end of capacitor C 1 respectively and is connected with piezo-resistance NTR1, the other end of described capacitor C 1 is connected the other end and is connected with power input line road N respectively with piezo-resistance NTR1, the two ends of described capacitor C 2 are connected with power input line road N with power input line road L respectively, described piezo-resistance NTR2 one end is connected with power input line road N, is connected with earth terminal FG behind the other end series connection high-tension resistive ARR2; The input of described diverter switch JK1 is connected with power input line road L, the normally closed output of diverter switch JK1 is connected with power supply output line road L1, diverter switch JK1 often open output series limiting resistor R after be connected with power supply output line road L2, the input of described diverter switch JK2 is connected with power input line road N, the normally closed output of diverter switch JK2 is connected with power supply output line road N1, the output of often opening of diverter switch JK2 is connected with power supply output line road N2, is connected with diverter switch JK2 and often opens output and be connected with the output of often opening of diverter switch JK1 respectively in the two ends of the coil JM of described two-way transfer relay J.
Preferably, described two-way transfer relay J adopts AC220/12A two-way electromagnetic relay.
The beneficial effects of the utility model are, after adopting said structure, the utility model not only provides " 1+1 backup " power supply for distribution terminal, guaranteed the terminal non-stop run, and effectively avoided burning because of the relay that relay switch causes the generation of the failure condition that causes, improved the security level of distribution.The utlity model has advantage safe, reliable, easy to use, the working power protection that is not only applicable to the 10KV distribution terminal is switched with duplicate supply, and can be used for protection and the two-way switching of miscellaneous equipment power-supply system.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified:
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of PCB circuit board described in the utility model.
Embodiment
As shown in Figure 1, a kind of anti-lightning strike and double cross stream power transfer device of the present utility model comprises housing and is arranged on the interior PCB circuit board of housing.Described PCB circuit board comprises lightning protection filtration module, two-way handover module and current limliting module, described lightning protection filtration module one end is connected with the power input line road, the other end is connected with the input of two-way handover module, the normally closed output of described two-way module and the first power supply output line road, the output of often opening of two-way handover module is connected with the second source outlet line, and described current limliting module is arranged in the circuit of second source outlet line.
Fig. 2 is the circuit theory diagrams of PCB circuit board described in the utility model.As shown in Figure 2, described PCB circuit board comprises high-tension resistive ARR1, high-tension resistive ARR2, piezo-resistance NTR1, piezo-resistance NTR2, capacitor C 1, capacitor C 2, two-way transfer relay J and current-limiting resistance R, described high-tension resistive ARR1, high-tension resistive ARR2, piezo-resistance NTR1, piezo-resistance NTR2, capacitor C 1 and capacitor C 2 form the lightning protection filter circuit, described two-way transfer relay J comprises tangent line circle JM, change switch JK1 and diverter switch JK2, the end of described high-tension resistive ARR1 is connected with power input line road L, the other end is connected an end with an end of capacitor C 1 respectively and is connected with piezo-resistance NTR1, the other end of described capacitor C 1 is connected the other end and is connected with power input line road N respectively with piezo-resistance NTR1, the two ends of described capacitor C 2 are connected with power input line road N with power input line road L respectively, described piezo-resistance NTR2 one end is connected with power input line road N, is connected with earth terminal FG behind the other end series connection high-tension resistive ARR2; The input of described diverter switch JK1 is connected with power input line road L, the normally closed output of diverter switch JK1 is connected with power supply output line road L1, diverter switch JK1 often open output series limiting resistor R after be connected with power supply output line road L2, the input of described diverter switch JK2 is connected with power input line road N, the normally closed output of diverter switch JK2 is connected with power supply output line road N1, the output of often opening of diverter switch JK2 is connected with power supply output line road N2, is connected with diverter switch JK2 and often opens output and be connected with the output of often opening of diverter switch JK1 respectively in the two ends of the coil JM of described two-way transfer relay J.
Preferably, the two-way transfer relay described in above-described embodiment adopts AC220/12A two-way electromagnetic relay.
The utility model can make circuit when not switching between the homophase by the current-limiting resistance of selecting proper parameter, impulse current drops to 9.5A/5ms from 28A/5ms, guarantee that impulse current is in the relay rated current scope, avoids the handoff procedure relay to burn because impulse current is excessive.The two-way transfer relay adopts general AC220/12A two-way electromagnetic relay, relay coil gets electric under the normal condition, the relay adhesive, wherein one road power supply energising, when this this road power supply breaks down, relay automaticallyes switch, and a-road-through is electric in addition, and two-way switches the assurance terminal and uninterruptedly works.The lightning protection filter circuit is by selecting to be fit to piezo-resistance, high-voltage capacitance, the discharge diode built-up circuit of parameter, the surge voltage electric current that produces in the time of can absorbing thunderbolt.
The utility model can provide for distribution terminal " 1+1 backup " power supply, comprises the two-way power supply, the one tunnel is power terminal equipment wherein only under the normal condition, when one tunnel dead electricity, automatically switches to another road power supply, guarantees the terminal non-stop run.The utility model can effectively prevent thunderbolt by lightning protection circuit simultaneously, avoids relay to produce excessive impulse current in the two-way handoff procedure by the current-limiting resistance of selecting proper parameter and causes relay to burn the generation of phenomenon.
Claims (3)
1. anti-lightning strike and double cross stream power transfer device, comprise housing and be arranged on the interior PCB circuit board of housing, it is characterized in that, described PCB circuit board comprises lightning protection filtration module, two-way handover module and current limliting module, described lightning protection filtration module one end is connected with the power input line road, the other end is connected with the input of two-way handover module, the normally closed output of described two-way module and the first power supply output line road, the output of often opening of two-way handover module is connected with the second source outlet line, and described current limliting module is arranged in the circuit of second source outlet line.
2. a kind of anti-lightning strike and double cross stream power transfer device according to claim 1, it is characterized in that, described PCB circuit board comprises high-tension resistive ARR1, high-tension resistive ARR2, piezo-resistance NTR1, piezo-resistance NTR2, capacitor C 1, capacitor C 2, two-way transfer relay J and current-limiting resistance R, described high-tension resistive ARR1, high-tension resistive ARR2, piezo-resistance NTR1, piezo-resistance NTR2, capacitor C 1 and capacitor C 2 form the lightning protection filter circuit, described two-way transfer relay J comprises tangent line circle JM, change switch JK1 and diverter switch JK2, the end of described high-tension resistive ARR1 is connected with power input line road L, the other end is connected an end with an end of capacitor C 1 respectively and is connected with piezo-resistance NTR1, the other end of described capacitor C 1 is connected the other end and is connected with power input line road N respectively with piezo-resistance NTR1, the two ends of described capacitor C 2 are connected with power input line road N with power input line road L respectively, described piezo-resistance NTR2 one end is connected with power input line road N, is connected with earth terminal FG behind the other end series connection high-tension resistive ARR2; The input of described diverter switch JK1 is connected with power input line road L, the normally closed output of diverter switch JK1 is connected with power supply output line road L1, diverter switch JK1 often open output series limiting resistor R after be connected with power supply output line road L2, the input of described diverter switch JK2 is connected with power input line road N, the normally closed output of diverter switch JK2 is connected with power supply output line road N1, the output of often opening of diverter switch JK2 is connected with power supply output line road N2, is connected with diverter switch JK2 and often opens output and be connected with the output of often opening of diverter switch JK1 respectively in the two ends of the coil JM of described two-way transfer relay J.
3. a kind of anti-lightning strike and double cross stream power transfer device according to claim 1 and 2 is characterized in that described two-way transfer relay J adopts AC220/12A two-way electromagnetic relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618017 CN202888955U (en) | 2012-11-20 | 2012-11-20 | Lightning protection and double-alternating-current power switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618017 CN202888955U (en) | 2012-11-20 | 2012-11-20 | Lightning protection and double-alternating-current power switching device |
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| Publication Number | Publication Date |
|---|---|
| CN202888955U true CN202888955U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220618017 Expired - Fee Related CN202888955U (en) | 2012-11-20 | 2012-11-20 | Lightning protection and double-alternating-current power switching device |
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| CN (1) | CN202888955U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130176A (en) * | 2016-08-29 | 2016-11-16 | 苏州工业园区科佳自动化有限公司 | A kind of band lightning protection miniature double loop power supply switch |
| CN106300649A (en) * | 2016-10-28 | 2017-01-04 | 武汉长光科技有限公司 | Communication equipment dual power supply automatic switch-over circuit device |
| CN110707803A (en) * | 2019-10-14 | 2020-01-17 | 广州创锐车用电器有限公司 | Power supply switching device and vehicle |
| CN113703387A (en) * | 2021-08-24 | 2021-11-26 | 无锡江南计算技术研究所 | Dual output voltage sampling circuit switching system of treater power |
-
2012
- 2012-11-20 CN CN 201220618017 patent/CN202888955U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130176A (en) * | 2016-08-29 | 2016-11-16 | 苏州工业园区科佳自动化有限公司 | A kind of band lightning protection miniature double loop power supply switch |
| CN106130176B (en) * | 2016-08-29 | 2018-07-17 | 苏州工业园区科佳自动化有限公司 | A kind of miniature double loop power supply switch of band lightning protection |
| CN106300649A (en) * | 2016-10-28 | 2017-01-04 | 武汉长光科技有限公司 | Communication equipment dual power supply automatic switch-over circuit device |
| CN110707803A (en) * | 2019-10-14 | 2020-01-17 | 广州创锐车用电器有限公司 | Power supply switching device and vehicle |
| CN110707803B (en) * | 2019-10-14 | 2021-05-25 | 广州创锐车用电器有限公司 | Power supply switching device and vehicle |
| CN113703387A (en) * | 2021-08-24 | 2021-11-26 | 无锡江南计算技术研究所 | Dual output voltage sampling circuit switching system of treater power |
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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: 20130417 Termination date: 20131120 |