CN202058567U - Lightning-proof isolation transformer - Google Patents
Lightning-proof isolation transformer Download PDFInfo
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- CN202058567U CN202058567U CN2011201399260U CN201120139926U CN202058567U CN 202058567 U CN202058567 U CN 202058567U CN 2011201399260 U CN2011201399260 U CN 2011201399260U CN 201120139926 U CN201120139926 U CN 201120139926U CN 202058567 U CN202058567 U CN 202058567U
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Abstract
The utility model provides a lightning-proof isolation transformer, belonging to the field of transformers. The lightning-proof isolation transformer aims at solving the problem that the existing lightning-proof device has single function and structure. In the utility model, the 1:1 isolation transformer is adopted; the primary coil is provided with a pressure-sensitive resistor with large flux so as to leak, weaken and clamp the unusual lightning wave, reduce the gradient of pulse and block the high-frequency lightning wave to be serially input in the circuit; furthermore, a common-mode choke coil is used for inhibiting high-frequency common-mode clutter and differential-mode clutter, eliminating clutter signal interference, stabilizing voltage and isolating harmonic wave; the secondary coil of the isolation transformer is provided with a voltage-resistant lower pressure-sensitive resistor and a discharge tube so as to finish the earth leakage and elimination on the lightning wave, thus eliminating harmonic waves for the unusual voltage at the wire inlet end of the power supply and removing the clutter signal interference; and particularly the lightning current can be leaked, weakened, isolated and limited, thus ensuring that the equipment runs in the stable and reliable working voltage and current.
Description
Technical field
The utility model relates to a kind of anti-lightning strike isolating transformer; be that power consumption equipment is carried out voltage protection; can be effectively release to weaken to the condition of instant error input voltage and isolate amplitude limit, the device of the reliable and stable operation of support equipment be especially to the protection of device power supply (DPS) level damage to crops caused by thunder.Belong to field transformer.
Background technology
Along with industrial development, the productive life social development be unable to do without power consumption equipment, and thunder and lightning is a natural phenomena, and annual damage to crops caused by thunder accident frequently takes place, and causes suffering heavy losses, and the lightning protection mitigation is necessary for this reason.And numerous known lightning protection are system complex engineerings, multi-pronged competence exertion actual effect.The protection of present circumstances induction lightening source side face all takes discharge tube, piezo-resistance, pressure limiting diode etc. to protect, structure is single, function is simple, single thunder and lightning characteristic spike waveform is handled, institute's application technology is single, want strict coupling apart from impedance between lightning protection component, shortcoming absorption buffering attenuator circuit physically is easy to allow the through final power consumption equipment of lightning current cause damaging; Shortcoming lacks corresponding power supply ripple harmonic wave and checks filtering circuit, and it is powerless to some interference signal, and, cause the noise of ripple harmonic wave etc. to disturb to electrical network inevitably in fact along with the increasing of power consumption equipment, have influence on the occasion that some power source performance is had relatively high expectations.
Summary of the invention
The utility model purpose is in order to solve the single problem of functional structure of existing lightning protection component, a kind of anti-lightning strike isolating transformer to be provided.
Anti-lightning strike isolating transformer described in the utility model, it comprises the first piezo-resistance M1, the second piezo-resistance M2, the 3rd piezo-resistance M3, the 4th piezo-resistance M4, the 5th piezo-resistance M5, the 6th piezo-resistance M6, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the first coil L1, the second coil L2, common mode choke coil L3, transformer T, LED lamp and discharge tube CR1;
The first piezo-resistance M1 is connected in parallel between live wire Lin and the ground wire G, and the second piezo-resistance M2 is connected in parallel between live wire Lin and the zero line Nin, and the 3rd piezo-resistance M3 is connected in parallel between zero line Nin and the ground wire G,
Live wire Lin output links to each other with the end of the first coil L1, the other end of the first coil L1 links to each other with an end of second resistance R 2, the other end of second resistance R 2 links to each other with an end of the primary coil of transformer T, the other end of the primary coil of transformer T links to each other with the 3rd resistance R 3, the other end of the 3rd resistance R 3 links to each other with the end of the second coil L2, and the other end of the second coil L2 links to each other with zero line Nin output;
The other end of the first coil L1 also links to each other with an end of first capacitor C 1, and the other end of first capacitor C 1 links to each other with an end of first resistance R 1, and the other end of first resistance R 1 links to each other with the end of the second coil L2;
The other end of second resistance R 2 also links to each other with an end of second capacitor C 2, and the other end of second capacitor C 2 links to each other with ground wire G;
The other end of second resistance R 2 also links to each other with an end of the 3rd capacitor C 3, and the other end of the 3rd capacitor C 3 links to each other with zero line Nin, and an end of the 4th capacitor C 4 links to each other with the other end of the primary coil of transformer T, and the other end of the 4th capacitor C 4 links to each other with ground wire G;
The other end of second resistance R 2 also links to each other with an end of the 4th resistance R 4, and the other end of the 4th resistance R 4 links to each other with zero line Nin;
Common mode choke coil L3 is arranged between live wire Lin and the zero line Nin, and winding of common mode choke coil L3 is arranged on the two ends of second resistance R 2, and another winding of common mode choke coil L3 is arranged on the two ends of the 3rd resistance R 3;
The LED lamp is connected in parallel on the two ends of the secondary coil of transformer T, one end of the secondary coil of transformer T also links to each other with the end of the 4th piezo-resistance M4, the other end of the 4th piezo-resistance M4 links to each other with the end of discharge tube CR1, and the other end of discharge tube CR1 links to each other with ground wire G;
The end of discharge tube CR1 also links to each other with the end of the 6th piezo-resistance M6, and the other end of the 6th piezo-resistance M6 links to each other with the other end of the secondary coil of transformer T;
The 5th piezo-resistance M5 is connected in parallel on the two ends of the secondary coil of transformer T; The two ends of the 5th piezo-resistance M5 are as two outputs of described anti-lightning strike isolating transformer.
Advantage of the present utility model: the isolating transformer that the utility model provides has anti-lightning strike effect; this anti-lightning strike isolating transformer can not only be to the unusual lightning wave of the power unit weakening clamper of releasing; reduce the steepness of pulse; stop that the high frequency lightning wave seals in circuit; and can play reasonable inhibition effect to high frequency common mode clutter and differential mode clutter; the elimination noise signal is disturbed; burning voltage, isolation harmonic wave; improve stable equipment operation; reduce device damage, the effect of protection personal safety.
The utility model selects for use the big piezo-resistance of through-current capacity to release over the ground, be certain to weaken through the lightning wave amplitude and the electric current of releasing, again by multistage low-pass filter circuit, further lightning wave is carried out the amplitude limit limit frequently, because the inductance in the circuit can produce back electromotive force to the high frequency lightning wave, be high impedance, can stop the intrusion of lightning wave, simultaneously can limit sealing in of high-frequency impulse, can carry out filtering to power supply clutter, harmonic wave under the situation at ordinary times.After isolate through 1: 1 isolating transformer again, can further can stop the transmission of noises such as a part of harmonic wave by the shielding separator, reduce the interference of high frequency transient to a certain extent once more, the voltage of systems stabilisation is released over the ground and the lightning wave of eliminating is not yet installed additional withstand voltage pressure-sensitive resistance and the discharge tube of hanging down at transformer secondary output.Structure and the combination of characteristic coupling by these several circuit, thereby power supply end of incoming cables abnormal electrical pressure energy is carried out harmonic carcellation, the removal noise signal is disturbed, particularly lightning current release, weaken, isolation, amplitude limit, guarantee that equipment operation is in reliable and stable operating voltage and electric current.
Description of drawings
Fig. 1 is the structural representation of anti-lightning strike isolating transformer.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, the described anti-lightning strike isolating transformer of present embodiment, it is characterized in that it comprises the first piezo-resistance M1, the second piezo-resistance M2, the 3rd piezo-resistance M3, the 4th piezo-resistance M4, the 5th piezo-resistance M5, the 6th piezo-resistance M6, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the first coil L1, the second coil L2, common mode choke coil L3, transformer T, LED lamp and discharge tube CR1;
The first piezo-resistance M1 is connected in parallel between live wire Lin and the ground wire G, and the second piezo-resistance M2 is connected in parallel between live wire Lin and the zero line Nin, and the 3rd piezo-resistance M3 is connected in parallel between zero line Nin and the ground wire G,
Live wire Lin output links to each other with the end of the first coil L1, the other end of the first coil L1 links to each other with an end of second resistance R 2, the other end of second resistance R 2 links to each other with an end of the primary coil of transformer T, the other end of the primary coil of transformer T links to each other with the 3rd resistance R 3, the other end of the 3rd resistance R 3 links to each other with the end of the second coil L2, and the other end of the second coil L2 links to each other with zero line Nin output;
The other end of the first coil L1 also links to each other with an end of first capacitor C 1, and the other end of first capacitor C 1 links to each other with an end of first resistance R 1, and the other end of first resistance R 1 links to each other with the end of the second coil L2;
The other end of second resistance R 2 also links to each other with an end of second capacitor C 2, and the other end of second capacitor C 2 links to each other with ground wire G;
The other end of second resistance R 2 also links to each other with an end of the 3rd capacitor C 3, and the other end of the 3rd capacitor C 3 links to each other with zero line Nin, and an end of the 4th capacitor C 4 links to each other with the other end of the primary coil of transformer T, and the other end of the 4th capacitor C 4 links to each other with ground wire G;
The other end of second resistance R 2 also links to each other with an end of the 4th resistance R 4, and the other end of the 4th resistance R 4 links to each other with zero line Nin;
Common mode choke coil L3 is arranged between live wire Lin and the zero line Nin, and winding of common mode choke coil L3 is arranged on the two ends of second resistance R 2, and another winding of common mode choke coil L3 is arranged on the two ends of the 3rd resistance R 3;
The LED lamp is connected in parallel on the two ends of the secondary coil of transformer T, one end of the secondary coil of transformer T also links to each other with the end of the 4th piezo-resistance M4, the other end of the 4th piezo-resistance M4 links to each other with the end of discharge tube CR1, and the other end of discharge tube CR1 links to each other with ground wire G;
The end of discharge tube CR1 also links to each other with the end of the 6th piezo-resistance M6, and the other end of the 6th piezo-resistance M6 links to each other with the other end of the secondary coil of transformer T;
The 5th piezo-resistance M5 is connected in parallel on the two ends of the secondary coil of transformer T; The two ends of the 5th piezo-resistance M5 are as two outputs of described anti-lightning strike isolating transformer.
It is that 40KA～80KA, impact voltage-withstand are the TMOV module of 550V～700V that the first piezo-resistance M1, the second piezo-resistance M2 and the 3rd piezo-resistance M3 choose through-current capacity.
It is that 10KA～30KA, impact voltage-withstand are the TMOV module of 400V～550V that the 4th piezo-resistance M4, the 5th piezo-resistance M5 and the 6th piezo-resistance M6 choose through-current capacity.
In order to overcome the single deficiency of functional structure of existing lightning-arrest device or circuit; the utility model provides a kind of isolating transformer of enhancement mode; has anti-lightning strike effect; this anti-lightning strike isolating transformer can not only be to the unusual lightning wave of the power unit weakening clamper of releasing; reduce the steepness of pulse; stop that the high frequency lightning wave seals in circuit; and can play reasonable inhibition effect to high frequency common mode clutter and differential mode clutter; the elimination noise signal is disturbed; burning voltage; isolate harmonic wave; improve stable equipment operation, reduce device damage, the effect of protection personal safety.
The technical scheme that its technical problem that solves the utility model adopts is: medium at city scope or average year Thunderstorm Weather and rank; application power source performance requirement etc.; the lightning protection of device power supply (DPS) part and supply voltage stability and Harmonic Interference problem no less important; need cooperatively interact, can utilize modes such as filter circuit, isolated from power, surge protection circuit to make up and reach improvement.The lightning wave amplitude of at first considering introducing supply line is big, electric current is stronger, should can not stop to dredge and to release, otherwise equipment must damage, so the piezo-resistance of big through-current capacity should be put in the first place, it is big to bring into play its through-current capacity, characteristics such as the response time is fast, and residual voltage is low.Be certain to weaken through the lightning wave amplitude and the electric current of releasing over the ground, again by multistage low-pass filter circuit, further lightning wave is carried out the amplitude limit limit frequently, because the inductance in the circuit can produce back electromotive force to the high frequency lightning wave, be high impedance, can stop the intrusion of lightning wave, can limit sealing in of high-frequency impulse simultaneously, can carry out filtering to power supply clutter, harmonic wave under the situation at ordinary times.After isolate through 1: 1 isolating transformer again, can further can stop the transmission of noises such as a part of harmonic wave by the shielding separator, reduce the interference of high frequency transient to a certain extent once more, the voltage of systems stabilisation is released over the ground and the lightning wave of eliminating is not yet installed additional withstand voltage pressure-sensitive resistance and the discharge tube of hanging down at transformer secondary output.Structure and the combination of characteristic coupling by these several circuit, thereby power supply end of incoming cables abnormal electrical pressure energy is carried out harmonic carcellation, the removal noise signal is disturbed, particularly lightning current release, weaken, isolation, amplitude limit, guarantee that equipment operation is in reliable and stable operating voltage and electric current.
Concrete operation principle:
Wherein the first piezo-resistance M1, the second piezo-resistance M2 and the 3rd piezo-resistance M3 are respectively the bigger piezo-resistance of through-current capacity; through-current capacity is between 40KA～80KA; initial lightning current to the destructive power maximum is farthest released; adopt L-N; L-G; the general protection of N-G is carried out the amplitude limit current limliting to initial introducing high voltage, suppresses the common mode overvoltage.Because the lightning wave frequency spectrum is than horn of plenty, but main concentration of energy is more than 50hz, and the parasitic capacitance of two inductance L 1, L2 and the second piezo-resistance M2 and capacitor C 1 constitute the common mode and the differential mode low pass filter of the first order respectively, implement the first decay to temporary overvoltage ripple medium-high frequency component; The common mode inductance of common mode choke coil L3 and capacitor C 2, C4 constitute second level common mode low pass filter; Capacitor C 3 decays to the remaining high fdrequency component that decays through the first order once more as second level differential mode low pass filter.Above-mentioned at ordinary times two-stage common mode differential mode low pass filter then carries out filtering to the high-frequency harmonic of supply power voltage, purifies harmonic voltage and disturbs.Again by the isolation of isolating transformer to lightning current; bring into play its electromagnetic induction back electromotive force and magnetic saturation characteristic; further isolate and weaken lightning current; isolating transformer is secondary select again withstand voltage lower; piezo-resistance that capacity is less and discharge tube can further be released and amplitude limit to the lightning current of back level; the normal operation in normal isolating transformer then can be isolated the voltage of input; ensure the voltage security of back level; the also further transmission of filtering harmonic signal induction simultaneously; through after a plurality of combinations as figure, just can stablize and be restricted to the level that protected electronic equipment can tolerate along the abnormal voltage that power line attacks.
The described anti-lightning strike isolating transformer input binding post of present embodiment is received power supply point of incoming cables (at present only for exchanging 220v), apparatus of load is all received output end binding post place (being not more than 600w only for bearing power at present), again the ground connection terminal of complete machine is received earth mat, energising gets final product then.
Embodiment two: present embodiment is described further execution mode one, it also comprises seven fuses, live wire Lin output is provided with a fuse, the first piezo-resistance M1, the second piezo-resistance M2, the 3rd piezo-resistance M3, the 4th piezo-resistance M4, the 5th piezo-resistance M5 and the 6th piezo-resistance M6 fuse of connecting respectively.
The fuse that adds is done further protection to circuit.
Embodiment three: the difference of present embodiment and execution mode one is: it is that 60KA, impact voltage-withstand are the TMOV module of 620V that the first piezo-resistance M1, the second piezo-resistance M2 and the 3rd piezo-resistance M3 choose through-current capacity, and other is identical with execution mode one.
Embodiment four: the difference of present embodiment and execution mode one is: it is that 20KA, impact voltage-withstand are the TMOV module of 471V that the 4th piezo-resistance M4, the 5th piezo-resistance M5 and the 6th piezo-resistance M6 choose through-current capacity, and other is identical with execution mode one.
Claims (6)
1. anti-lightning strike isolating transformer, it is characterized in that it comprises first piezo-resistance (M1), second piezo-resistance (M2), the 3rd piezo-resistance (M3), the 4th piezo-resistance (M4), the 5th piezo-resistance (M5), the 6th piezo-resistance (M6), first resistance (R1), second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), first electric capacity (C1), second electric capacity (C2), the 3rd electric capacity (C3), the 4th capacitor C 4, first coil (L1), second coil (L2), common mode choke coil (L3), transformer (T), LED lamp and discharge tube (CR1);
First piezo-resistance (M1) is connected in parallel between live wire Lin and the ground wire G, and second piezo-resistance (M2) is connected in parallel between live wire Lin and the zero line Nin, and the 3rd piezo-resistance (M3) is connected in parallel between zero line Nin and the ground wire G,
Live wire Lin output links to each other with an end of first coil (L1), the other end of first coil (L1) links to each other with an end of second resistance (R2), the other end of second resistance (R2) links to each other with an end of the primary coil of transformer (T), the other end of the primary coil of transformer (T) links to each other with the 3rd resistance (R3), the other end of the 3rd resistance (R3) links to each other with an end of second coil (L2), and the other end of second coil (L2) links to each other with zero line Nin output;
The other end of first coil (L1) also links to each other with an end of first electric capacity (C1), and the other end of first electric capacity (C1) links to each other with an end of first resistance (R1), and the other end of first resistance (R1) links to each other with an end of second coil (L2);
The other end of second resistance (R2) also links to each other with an end of second electric capacity (C2), and the other end of second electric capacity (C2) links to each other with ground wire G;
The other end of second resistance (R2) also links to each other with an end of the 3rd electric capacity (C3), the other end of the 3rd electric capacity (C3) links to each other with zero line Nin, one end of the 4th capacitor C 4 links to each other with the other end of the primary coil of transformer (T), and the other end of the 4th capacitor C 4 links to each other with ground wire G;
The other end of second resistance (R2) also links to each other with an end of the 4th resistance (R4), and the other end of the 4th resistance (R4) links to each other with zero line Nin;
Common mode choke coil (L3) is arranged between live wire Lin and the zero line Nin, and winding of common mode choke coil (L3) is arranged on the two ends of second resistance (R2), and another winding of common mode choke coil (L3) is arranged on the two ends of the 3rd resistance (R3);
The LED lamp is connected in parallel on the two ends of the secondary coil of transformer (T), one end of the secondary coil of transformer (T) also links to each other with an end of the 4th piezo-resistance (M4), the other end of the 4th piezo-resistance (M4) links to each other with an end of discharge tube (CR1), and the other end of discharge tube (CR1) links to each other with ground wire G;
One end of discharge tube (CR1) also links to each other with an end of the 6th piezo-resistance (M6), and the other end of the 6th piezo-resistance (M6) links to each other with the other end of the secondary coil of transformer (T);
The 5th piezo-resistance (M5) is connected in parallel on the two ends of the secondary coil of transformer (T); The two ends of the 5th piezo-resistance (M5) are as two outputs of described anti-lightning strike isolating transformer.
2. anti-lightning strike isolating transformer according to claim 1, it is characterized in that, it also comprises seven fuses, live wire Lin output is provided with a fuse, first piezo-resistance (M1), second piezo-resistance (M2), the 3rd piezo-resistance (M3), the 4th piezo-resistance (M4), the 5th piezo-resistance (M5) and the 6th piezo-resistance (M6) fuse of connecting respectively.
3. anti-lightning strike isolating transformer according to claim 1, it is characterized in that it is that 40KA～80KA, impact voltage-withstand are the TMOV module of 550V～700V that first piezo-resistance (M1), second piezo-resistance (M2) and the 3rd piezo-resistance (M3) are chosen through-current capacity.
4. anti-lightning strike isolating transformer according to claim 1 is characterized in that, it is that 60KA, impact voltage-withstand are the TMOV module of 620V that first piezo-resistance (M1), second piezo-resistance (M2) and the 3rd piezo-resistance (M3) are chosen through-current capacity.
5. anti-lightning strike isolating transformer according to claim 1, it is characterized in that it is that 10KA～30KA, impact voltage-withstand are the TMOV module of 400V～550V that the 4th piezo-resistance (M4), the 5th piezo-resistance (M5) and the 6th piezo-resistance (M6) are chosen through-current capacity.
6. anti-lightning strike isolating transformer according to claim 1 is characterized in that, it is that 20KA, impact voltage-withstand are the TMOV module of 471V that the 4th piezo-resistance (M4), the 5th piezo-resistance (M5) and the 6th piezo-resistance (M6) are chosen through-current capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201399260U CN202058567U (en) | 2011-05-05 | 2011-05-05 | Lightning-proof isolation transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201399260U CN202058567U (en) | 2011-05-05 | 2011-05-05 | Lightning-proof isolation transformer |
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| CN202058567U true CN202058567U (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201399260U Expired - Lifetime CN202058567U (en) | 2011-05-05 | 2011-05-05 | Lightning-proof isolation transformer |
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| CN103078307A (en) * | 2013-01-27 | 2013-05-01 | 黄永捷 | Lightning-protected switch-signal indicating rectifier |
| CN103296873A (en) * | 2012-02-28 | 2013-09-11 | 研祥智能科技股份有限公司 | Power supply and filter of power supply |
| CN103474977A (en) * | 2013-09-30 | 2013-12-25 | 深圳科安达电子科技股份有限公司 | Lightning protection device, lightning protection combination and lightning protection cabinet |
| CN103580015A (en) * | 2012-08-07 | 2014-02-12 | 深圳远征技术有限公司 | Thunder filter and electronic device |
| CN104113352A (en) * | 2014-07-22 | 2014-10-22 | 中国科学技术大学 | Transformer with self interference signal offsetting function and ultrahigh frequency radio frequency identification device (RFID) receiver front end based on same |
| CN104518504A (en) * | 2013-09-30 | 2015-04-15 | 深圳市海洋王照明工程有限公司 | Anti-surge circuit and LED lighting system |
| CN105162102A (en) * | 2014-06-09 | 2015-12-16 | 山东纵深科技发展有限公司 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
| CN106253002A (en) * | 2016-07-28 | 2016-12-21 | 中国联合网络通信集团有限公司 | A kind of isolated form lightning protection busbar |
| CN107086464A (en) * | 2017-05-22 | 2017-08-22 | 四川艾德瑞电气有限公司 | Traction substation pressure resistant type isolating transformer case |
| CN107578901A (en) * | 2017-10-12 | 2018-01-12 | 深圳市创仕达电子有限公司 | A kind of transformer electromagnetic interference protecting system |
| CN107707109A (en) * | 2017-10-19 | 2018-02-16 | 青岛海信日立空调系统有限公司 | A kind of power circuit and air conditioner |
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- 2011-05-05 CN CN2011201399260U patent/CN202058567U/en not_active Expired - Lifetime
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| CN103296873A (en) * | 2012-02-28 | 2013-09-11 | 研祥智能科技股份有限公司 | Power supply and filter of power supply |
| CN103296873B (en) * | 2012-02-28 | 2017-08-15 | 研祥智能科技股份有限公司 | A kind of power supply and its wave filter |
| CN103580015B (en) * | 2012-08-07 | 2016-12-21 | 深圳远征技术有限公司 | A kind of LIGHTNING FILTER and electronic equipment |
| CN103580015A (en) * | 2012-08-07 | 2014-02-12 | 深圳远征技术有限公司 | Thunder filter and electronic device |
| CN103078307A (en) * | 2013-01-27 | 2013-05-01 | 黄永捷 | Lightning-protected switch-signal indicating rectifier |
| CN103474977A (en) * | 2013-09-30 | 2013-12-25 | 深圳科安达电子科技股份有限公司 | Lightning protection device, lightning protection combination and lightning protection cabinet |
| CN104518504A (en) * | 2013-09-30 | 2015-04-15 | 深圳市海洋王照明工程有限公司 | Anti-surge circuit and LED lighting system |
| CN103474977B (en) * | 2013-09-30 | 2016-10-05 | 深圳科安达电子科技股份有限公司 | A kind of lightning protection device, lightning protection combination and lightning protection cabinet |
| CN105162102A (en) * | 2014-06-09 | 2015-12-16 | 山东纵深科技发展有限公司 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
| CN104113352A (en) * | 2014-07-22 | 2014-10-22 | 中国科学技术大学 | Transformer with self interference signal offsetting function and ultrahigh frequency radio frequency identification device (RFID) receiver front end based on same |
| CN104113352B (en) * | 2014-07-22 | 2016-05-25 | 中国科学技术大学 | Have and offset the transformer of self-interference signal function and the ultrahigh frequency RFID receiver front end based on this transformer |
| CN106253002A (en) * | 2016-07-28 | 2016-12-21 | 中国联合网络通信集团有限公司 | A kind of isolated form lightning protection busbar |
| CN107086464A (en) * | 2017-05-22 | 2017-08-22 | 四川艾德瑞电气有限公司 | Traction substation pressure resistant type isolating transformer case |
| CN109390887A (en) * | 2017-08-14 | 2019-02-26 | 深圳康普盾科技股份有限公司 | A kind of combined connection box having lightning protection function |
| CN109390887B (en) * | 2017-08-14 | 2024-02-02 | 深圳康普盾科技股份有限公司 | Combined junction box with lightning protection function |
| CN107578901A (en) * | 2017-10-12 | 2018-01-12 | 深圳市创仕达电子有限公司 | A kind of transformer electromagnetic interference protecting system |
| CN107578901B (en) * | 2017-10-12 | 2024-02-20 | 深圳市创仕达电子有限公司 | Transformer electromagnetic interference protection system |
| CN107707109A (en) * | 2017-10-19 | 2018-02-16 | 青岛海信日立空调系统有限公司 | A kind of power circuit and air conditioner |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GRANDBLUE ENVIRONMENT CO., LTD. Free format text: FORMER NAME: NANHAI DEVELOPMENT CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 528200 Guangdong Foshan Nanhai Nanhai Nanhai Avenue building, Guicheng Patentee after: Grandblue Environment Co., Ltd. Address before: 528200, Guangdong Foshan Nanhai Nanhai Avenue Finance Union Building Patentee before: Nanhai Development Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111130 |