CN106849042A - Surge suppression and overcurrent protection device - Google Patents

Surge suppression and overcurrent protection device Download PDF

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Publication number
CN106849042A
CN106849042A CN201610829672.2A CN201610829672A CN106849042A CN 106849042 A CN106849042 A CN 106849042A CN 201610829672 A CN201610829672 A CN 201610829672A CN 106849042 A CN106849042 A CN 106849042A
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CN
China
Prior art keywords
surge absorber
input
surging
overcurrent protection
thermal cutoffs
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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.)
Pending
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CN201610829672.2A
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Chinese (zh)
Inventor
黄进祥
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Individual
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Individual
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Publication of CN106849042A publication Critical patent/CN106849042A/en
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/041Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/041Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature additionally responsive to excess current

Abstract

A surge suppression and overcurrent protection device comprises a first input end, a second input end, a first output end and a second output end, and comprises a surge absorber and a temperature fuse, wherein the surge absorber is provided with a first end and a second end, the first end is connected with the first input end, the second end is connected with the second input end and the second output end, the temperature fuse is provided with a third end and a fourth end, the third end is connected with the first end of the surge absorber, the fourth end is connected with the first output end, the temperature fuse senses the temperature of the surge absorber and is disconnected when the sensed temperature exceeds a limit value which can be borne, and therefore the load is protected from being damaged by impact of overlarge current.

Description

Surging suppresses and overcurrent protection
Technical field
The present invention relates to a kind of lightning protection device, more particularly to a kind of surging suppresses and overcurrent protection.
Background technology
The short then hundreds of meters of general electric power loop, length can reach several kilometers, when thunderbolt is run into, the height that thunderbolt moment produces If pressure surging follows electric power loop and enters building, the load being easily connected on electric power loop is struck by lightning and is damaged.Therefore, it is The high pressure surging infringement load that thunderbolt is produced is prevented, as shown in figure 1, prior art is in parallel usually using a surge absorber 10 Between a power supply 11 and a load 12 in electric power loop, in the case of normal power supply, surge absorber 10 is in high impedance Approximate open-circuit condition, enables power supply 11 directly to supply electricity to load 12, and when being struck by lightning, surge absorber 10 can be because thunderbolt be produced Raw high pressure surging quickly becomes Low ESR and near short circuit state, and the high pressure surging is led back into the end of power supply 11, to avoid bearing Carry 12 impacts for being subject to high pressure surging and damage.
But surge absorber 10 by be struck by lightning produce high pressure surging lead back to 11 end of power supply when, understand the big electricity because bearing high frequency Stream and generate heat, and thus reduce its protective capacities and service life so that when surge absorber 10 breaks down, thunderbolt generation High pressure surging will be unable to effectively be led back to the end of power supply 11, and load 12 is impacted or damaged.
The content of the invention
Suppress it is an object of the invention to provide a kind of surging and overcurrent protection, it can suppress high pressure surging and prevent Only super-high-current is by load.
A kind of surging of the present invention suppresses and overcurrent protection, with a first input end, one second input, one the One output end and one second output end, and including:One surge absorber, with a first end and one second end, and the first end It is connected with the first input end, second end is connected with second input and second output end;And a Thermal Cutoffs, tool Have one the 3rd end and one the 4th end, and the 3rd end is connected with the first end of the surge absorber, the 4th end with this first Output end is connected, and the Thermal Cutoffs senses the temperature of the surge absorber, and temperature in sensing exceedes and can bear A limit value when disconnect.
In one embodiment of this invention, the surging suppresses and overcurrent protection also includes a resistance, and it has one 5th end and one the 6th end, and the 5th end is connected with second end of the surge absorber, the 6th end and second input End and second output end connection.
In one embodiment of this invention, the surging suppresses and overcurrent protection also includes a resistance, and it has one 5th end and one the 6th end, and the 5th end is connected with the first input end, the 6th end and the surge absorber this first End connection.
In one embodiment of this invention, the surge absorber and the Thermal Cutoffs are integrated and are packaged together.
In one embodiment of this invention, the Thermal Cutoffs is proximate to or is attached to the surface of the surge absorber.
Furthermore, present invention another kind surging suppresses and overcurrent protection, with a first input end, one second input End, one first output end and one second output end, and including:One surge absorber, with a first end and one second end, and should First end is connected with the first input end;One Thermal Cutoffs, dashes forward with one the 3rd end and one the 4th end, and the 3rd end with this The first end connection of wave absorber, the 4th end is connected with first output end;And a resistance, with one the 5th end and one Six ends, and the 5th end is connected with second end of the surge absorber, the 6th end and second input and this is second defeated Go out end connection, and the Thermal Cutoffs senses the temperature of the resistance, and exceed the restriction that can bear in the temperature for sensing Disconnected during value.
In one embodiment of this invention, the Thermal Cutoffs is integrated with the resistance and is packaged together, or the temperature is protected Dangerous silk is proximate to or is attached to the surface of the resistance.
Additionally, another surging of the invention suppresses and overcurrent protection, with a first input end, one second input End, one first output end and one second output end, and including:One surge absorber, with a first end and one second end, and should Second end is connected with second input and second output end;One Thermal Cutoffs, with one the 3rd end and one the 4th end, and 3rd end is connected with the first end of the surge absorber, and the 4th end is connected with first output end;And a resistance, have One the 5th end and one the 6th end, and the 5th end is connected with the first input end, the 6th end and the surge absorber this One end connects, and the Thermal Cutoffs senses the temperature of the resistance, and exceedes the restriction that can bear in the temperature for sensing Disconnected during value.
In one embodiment of this invention, the Thermal Cutoffs is integrated with the resistance and is packaged together, or the temperature is protected Dangerous silk is proximate to or is attached to the surface of the resistance.
And the first input end of foregoing invention and second input be used to a power supply electric coupling, to receive the power supply One electric power of input, and first output end and second output end be used to a load electric coupling, to export the electric power to should Load.
Beneficial effect of the invention is:The first output end (load) and sudden-wave absorbing are located at by by Thermal Cutoffs Between device, and Thermal Cutoffs is set to sense the temperature of surge absorber or resistance, with the temperature mistake of surge absorber or resistance Gao Shi, in time disconnects load with power supply, is damaged with protecting load to be subjected to the impact of super-high-current.
Brief description of the drawings
Fig. 1 shows the electricity for absorbing high pressure surging between a power supply and a load using sudden-wave absorbing modules in parallel in the past Road schematic diagram.
Fig. 2 show the first embodiment of surging of the present invention suppression and overcurrent protection circuit and its with power supply and The annexation schematic diagram of load.
Fig. 3 show the second embodiment of surging of the present invention suppression and overcurrent protection circuit and its with power supply and The annexation schematic diagram of load.
Fig. 4 show the 3rd embodiment of surging of the present invention suppression and overcurrent protection circuit and its with power supply and The annexation schematic diagram of load.
Fig. 5 show the fourth embodiment of surging of the present invention suppression and overcurrent protection circuit and its with power supply and The annexation schematic diagram of load.
Fig. 6 show the 5th embodiment of surging of the present invention suppression and overcurrent protection circuit and its with power supply and The annexation schematic diagram of load.
Fig. 7 shows that surging of the present invention suppresses and the input of overcurrent protection and the live wire of AC power and ground wire electricity Coupling.
Fig. 8 shows that surging of the present invention suppresses and the input of overcurrent protection and the neutral conductor of AC power and ground wire Electric coupling.
Fig. 9 show surging of the present invention suppress and overcurrent protection apply the power supply exported with three phase mains with bear Between load.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is described in detail.
It is the first embodiment of surging suppression of the present invention and overcurrent protection, the surging suppression of the present embodiment referring to Fig. 2 System and overcurrent protection 100 be used to a power supply 11, the live wire (L) and the neutral conductor (N) electric coupling of such as AC power, with Receive electric power input, and the neutral conductor with a first input end I1 and being connected with the live wire of power supply 11 and power supply 11 connects The the second input I2 for connecing, and to one load 12 electric couplings, for should electric power to load 12 one first output end O1 and one second output end O2, and including a surge absorber 20 and a Thermal Cutoffs 30.
Surge absorber 20 has a first end 21 and one second end 22, and the first end 21 connects with first input end I1 Connect, second end 22 is connected with the second input I2 and the second output end O2, and in the present embodiment, surge absorber 20 can be with It is a such as metal oxide piezo-resistance (MOV, Metal Oxide Varistor), its current-voltage characteristic curve has Height it is non-linear, that is, when the voltage between its two ends no more than one protection magnitude of voltage when, surge absorber 20 can be presented height Impedance and equivalent to open-circuit condition, and when the voltage between its two ends exceedes the protection magnitude of voltage, surge absorber 20 can wink Between present Low ESR and equivalent to short-circuit condition.
Thermal Cutoffs 30 has one the 3rd end 31 and one the 4th end 32, and the 3rd end 31 and surge absorber 20 the One end 21 connects, and the 4th end 32 is connected with the first output end O1, and Thermal Cutoffs 30 is used to sense surge absorber 20 Temperature, for example surge absorber 20 and Thermal Cutoffs 30 are integrated and are packaged together, as single component, or by temperature Degree fuse 30 is close to or is attached to the surface of surge absorber 20.Or also can be by a heat conductor by surge absorber 20 Heat transfer to Thermal Cutoffs 30 etc..
Whereby, because the voltage of the output of power supply 11 generally can all be less than the protection magnitude of voltage, therefore, when power supply 11 is normally supplied When electric, the two ends of surge absorber 20 are in the open-circuit condition of high impedance, and power supply 11 can directly be supplied electricity to via Thermal Cutoffs 30 Load 12.And work as the abnormal power supply of power supply 11, for example produce high pressure between live wire (L) and the neutral conductor (N) because being struck by lightning During surging, the two ends of surge absorber 20 can be in low-impedance short-circuit condition moment, make high pressure surging via surge absorber 20 The end of power supply 11 is returned to, and any harmful effect will not be produced to load 12, therefore load 12 can continue regular event.
Meanwhile, surge absorber 20 can heat up because of transient flow super-high-current, and when the temperature of surge absorber 20 is increased to During the limit value that can be born more than Thermal Cutoffs 30, Thermal Cutoffs 30 will blow, to avoid load 12 from bearing excessive The impact of electric current and damage.
After being generated heat because surge absorber 20 bears high current, can thus reduce its protective capacities, such as impedance becomes Low, causing the leakage current at its two ends increases, therefore, the characteristic of its usually high impedance can gradually drop with the increase of number of lightning strokes Low its impedance so that the leakage current for flowing through surge absorber 20 is increasing, until there is short circuit phenomenon, (for example leakage current increases Amplitude exceed surge absorber 20 can bear power when), surge absorber 20 will catching fire and lose surging protection Ability, produces danger, so that the high pressure surging of generation of being struck by lightning cannot effectively be led back to the end of power supply 11 by surge absorber 20, this When part high pressure surging load 12 will be impacted or damaged.Therefore, exist by the Thermal Cutoffs 30 of the present embodiment When the temperature of surge absorber 20 is too high (during the limit value that can be born more than Thermal Cutoffs 30), in time will load 12 and electricity Source 11 disconnects, and is damaged with protecting load 12 to be subjected to the impact of super-high-current.
It is the second embodiment of surging suppression of the present invention and overcurrent protection, the surging of the present embodiment referring back to Fig. 3 Suppress and the place different from first embodiment of overcurrent protection 200 is also to include a resistance 40, it has one the 5th end 41 And one the 6th end 42, and the 5th end 41 is connected with the second end 22 of surge absorber 20, the 6th end 42 and the second input I2 and the second output end O2 is connected, and whereby, when the high pressure surging that thunderbolt is produced passes through surge absorber 20, resistance 40 can be reduced The electric current on surge absorber 20 is produced because of thunderbolt, to protect surge absorber 20, and then surge absorber is greatly reduced 20 possibility broken down with burning, and when being struck by lightning, surge absorber 20 makes electricity because of the open-circuit condition in high impedance Resistance 40 will not consume the electric power of the output of power supply 11.
It is the 3rd embodiment of surging suppression of the present invention and overcurrent protection, the surging of the present embodiment referring back to Fig. 4 Suppression and the place different from second embodiment of overcurrent protection 300 are that the 5th end 41 of resistance 40 is and first input end I1 Connection, the 6th end 42 is connected with the first end 21 of surge absorber 20, that is, resistance 40 is series at Thermal Cutoffs 30 On electric power loop, whereby, can limit when being struck by lightning by the electric current on electric power loop, make to flow through the electric current of surge absorber 20 The current value that surge absorber 20 can bear and will not damage can be less than.
It is the fourth embodiment of surging suppression of the present invention and overcurrent protection, the surging of the present embodiment referring back to Fig. 5 Suppress and the place different from second embodiment of overcurrent protection 400 be that Thermal Cutoffs 30 is the temperature for sensing resistance 40, For example resistance 40 and Thermal Cutoffs 30 are integrated and is packaged together, as single component, or Thermal Cutoffs 30 leaned on Surface that is near or being attached to resistance 40.Or also can be by a heat conductor by the heat transfer of resistance 40 to Thermal Cutoffs 30 Deng.Because when high pressure surging flows through surge absorber 20 and resistance 40, can also make the heat of resistance 40 and heat up, therefore, when this When the temperature of resistance 40 of embodiment rises to over the limit value that Thermal Cutoffs 30 can bear, Thermal Cutoffs 30 will burn It is disconnected, damaged with avoiding load 12 from bearing the impact of super-high-current.After being generated heat because surge absorber 20 bears high current, Its protective capacities, such as impedance step-down thus can be reduced, causing the leakage current at its two ends increases so that when leakage current increasing degree During the power that can bear more than surge absorber 20, surge absorber 20 catching fire and will lose surging protective capacities, And the high pressure surging of generation of being struck by lightning cannot effectively be led back to the end of power supply 11, now the high pressure surging of part will cause punching to load 12 Hit or damage.Therefore, by the Thermal Cutoffs 30 of the present embodiment when the temperature of resistance 40 is too high (more than Thermal Cutoffs 30 During the limit value that can be born), in time load 12 is disconnected with power supply 11, to protect load 12 to be subjected to because of thunderbolt generation The impact of super-high-current and damage.
It is the 5th embodiment of surging suppression of the present invention and overcurrent protection, the surging of the present embodiment referring back to Fig. 6 Suppress and the place different from 3rd embodiment of overcurrent protection 500 be that Thermal Cutoffs 30 is the temperature for sensing resistance 40, For example resistance 40 and Thermal Cutoffs 30 are integrated and is packaged together, as single component, or Thermal Cutoffs 30 leaned on Surface that is near or being attached to resistance 40.Or also can be by a heat conductor by heat transfer of resistance 40 to Thermal Cutoffs 30 etc.. Because when high pressure surging flows through surge absorber 20 and resistance 40, can also make the heat of resistance 40 and heat up.Therefore, when this implementation When the temperature of resistance 40 of example rises to over the limit value that Thermal Cutoffs 30 can bear, Thermal Cutoffs 30 will blow, with Load 12 is avoided to bear the impact of super-high-current and damage.After being generated heat because surge absorber 20 bears high current, can be thus Reduce its protective capacities, such as impedance step-down, causing the leakage current at its two ends increases so that when leakage current increasing degree exceed it is prominent During the power that wave absorber 20 can bear, surge absorber 20 catching fire and will lose surging protective capacities, and cannot The high pressure surging of generation of being struck by lightning effectively is led back into the end of power supply 11, now the high pressure surging of part will be impacted or damaged to load 12 Evil.Therefore, (can be born more than Thermal Cutoffs 30 when the temperature of resistance 40 is too high by the Thermal Cutoffs 30 of the present embodiment Limit value when), in time load 12 is disconnected with power supply 11, to protect load 12 to be subjected to because of the excessive electricity of thunderbolt generation The impact of stream and damage.
Fig. 7 is see also, above-mentioned surging suppresses and overcurrent protection 100 (200,300,400,500) also can thermocouple Be connected between the live wire of power supply 11 (L) and ground wire (G), whereby, when power supply 11 because be struck by lightning and in live wire (L) and ground wire (G) Between produce high pressure surging when, surging suppress and overcurrent protection 100 (200,300,400,500) Thermal Cutoffs 30 When the temperature of resistance 40 is too high, in time load 12 can be disconnected with power supply 11, to protect load 12 to be subjected to because thunderbolt is produced The impact of raw super-high-current and damage.
Referring back to Fig. 8, above-mentioned surging suppresses and overcurrent protection 100 (200,300,400,500) also can thermocouple Be connected between the neutral conductor of power supply 11 (N) and ground wire (G), whereby, when power supply 11 because be struck by lightning and in the neutral conductor (N) and ground wire (G) when producing high pressure surging between, the Temperature protection of surging suppression and overcurrent protection 100 (200,300,400,500) Silk 30 in time can disconnect load 12 with power supply 11 when the temperature of resistance 40 is too high, to protect load 12 to be subjected to because of thunder Hit the impact of the super-high-current of generation and damage.
Again referring to Fig. 9, above-mentioned surging suppresses and overcurrent protection 100 (200,300,400,500) can also be applied Between the power supply 11 ' and load 12 ' exported with three phase mains R, S, T, that is, R, S output end in power supply 11 ' and load Surging is set between 12 ' to suppress and overcurrent protection 100 (or 200 to 500 one of them), is exported in S, T of power supply 11 ' Set surging between end and load 12 ' to suppress and overcurrent protection 100 one of (or 200 to 500), in power supply 11 ' R, T output end and load 12 ' between surging be set suppress and overcurrent protection 100 (or 200 to 500 one of them), Whereby, when a wherein surging suppresses and the Thermal Cutoffs 30 of overcurrent protection 100 (or 200 to 500 one of them) exists When the temperature of resistance 40 is too high, can will in time load 12 ' and be disconnected with power supply 11 ', to protect load 12 ' to be subjected to because thunderbolt is produced The impact of raw super-high-current and damage.
Additionally, it is noted that above-mentioned surging suppresses and overcurrent protection 100 (200,300,400,500) Except can electric coupling power supply 11,11 ' and load 12,12 ' between, also can electric coupling it is defeated with a signal in a signal output device Enter between equipment, so that when signal output device produces high pressure surging because being struck by lightning, surging suppresses and overcurrent protection dress Putting 100 (200,300,400,500) in time can disconnect signal output device and signal input device, to protect signal to be input into Equipment will not be impacted by super-high-current.
In sum, above-described embodiment is located at the first output end O1 (load 12) and surging suction by by Thermal Cutoffs 30 Between receipts device 20, and Thermal Cutoffs 30 is set to press close to surge absorber 20 or resistance 40, with surge absorber 20 or resistance 40 Temperature it is too high when, in time load 12 (12 ') and power supply 11 (11 ') are disconnected, to protect load 12 (12 ') to be subjected to The impact of high current and damage, actually reach effect of the invention and purpose.

Claims (4)

1. a kind of surging suppresses and overcurrent protection, with a first input end, one second input, one first output end And one second output end, it is characterised in that:
The surging suppresses and overcurrent protection also includes:
One surge absorber, is connected with a first end and one second end, and the first end with the first input end;
One Thermal Cutoffs, connects with one the 3rd end and one the 4th end, and the 3rd end with the first end of the surge absorber Connect, the 4th end is connected with first output end, and the Thermal Cutoffs senses the temperature of the surge absorber, and in sensing Temperature exceed can bear a limit value when disconnect;And
One resistance, it has one the 5th end and one the 6th end, and the 5th end is connected with second end of the surge absorber, should 6th end is connected with second input and second output end.
2. a kind of surging suppresses and overcurrent protection, with a first input end, one second input, one first output end And one second output end, it is characterised in that:
The surging suppresses and overcurrent protection also includes:
One surge absorber, with a first end and one second end, second end and second input and second output end Connection;
One Thermal Cutoffs, connects with one the 3rd end and one the 4th end, and the 3rd end with the first end of the surge absorber Connect, the 4th end is connected with first output end, and the Thermal Cutoffs senses the temperature of the surge absorber, and in sensing Temperature exceed can bear a limit value when disconnect;And
One resistance, it has one the 5th end and one the 6th end, and the 5th end is connected with the first input end, the 6th end with should The first end connection of surge absorber.
3. a kind of surging suppresses and overcurrent protection, with a first input end, one second input, one first output end And one second output end, it is characterised in that:
The surging suppresses and overcurrent protection also includes:
One surge absorber, is connected with a first end and one second end, and the first end with the first input end;
One Thermal Cutoffs, connects with one the 3rd end and one the 4th end, and the 3rd end with the first end of the surge absorber Connect, the 4th end is connected with first output end;And
One resistance, is connected with one the 5th end and one the 6th end, and the 5th end with second end of the surge absorber, and this Six ends are connected with second input and second output end, and the Thermal Cutoffs senses the temperature of the resistance, and in sense The temperature of survey disconnects when exceeding the limit value that can bear.
4. a kind of surging suppresses and overcurrent protection, with a first input end, one second input, one first output end And one second output end, it is characterised in that:
The surging suppresses and overcurrent protection also includes:
One surge absorber, with a first end and one second end, and second end and second input and second output End connection;
One Thermal Cutoffs, connects with one the 3rd end and one the 4th end, and the 3rd end with the first end of the surge absorber Connect, the 4th end is connected with first output end;And
One resistance, is connected with one the 5th end and one the 6th end, and the 5th end with the first input end, and the 6th end is dashed forward with this The first end connection of wave absorber, and the Thermal Cutoffs senses the temperature of the resistance, and exceed institute in the temperature for sensing Disconnected during the limit value that can be born.
CN201610829672.2A 2015-09-22 2016-09-19 Surge suppression and overcurrent protection device Pending CN106849042A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW104131286A TWI562490B (en) 2015-09-22 2015-09-22 Surge suppression and over current protection device
TW104131286 2015-09-22

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Publication Number Publication Date
CN106849042A true CN106849042A (en) 2017-06-13

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CN1130309A (en) * 1994-11-08 1996-09-04 关柏全 Device and method for preventing equipment from electric shock
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US20040080890A1 (en) * 2002-10-25 2004-04-29 Hawke Cable Glands Limited Digital instrumentation
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CN2919772Y (en) * 2006-05-30 2007-07-04 鹤山丽得电子实业有限公司 Mulriple protection means for LED decorating lamp
CN202026516U (en) * 2011-04-08 2011-11-02 王孝强 Electronic ballast input filtering loop
CN202094430U (en) * 2011-06-17 2011-12-28 林松 Intelligent and anti-electric shock safety socket

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Publication number Priority date Publication date Assignee Title
CN1130309A (en) * 1994-11-08 1996-09-04 关柏全 Device and method for preventing equipment from electric shock
JP2001025158A (en) * 1999-07-02 2001-01-26 Murata Mfg Co Ltd Protective circuit, and composite element used therefor
US20040080890A1 (en) * 2002-10-25 2004-04-29 Hawke Cable Glands Limited Digital instrumentation
JP2006304557A (en) * 2005-04-22 2006-11-02 Sharp Corp Protection circuit and power supply device
CN2919772Y (en) * 2006-05-30 2007-07-04 鹤山丽得电子实业有限公司 Mulriple protection means for LED decorating lamp
CN202026516U (en) * 2011-04-08 2011-11-02 王孝强 Electronic ballast input filtering loop
CN202094430U (en) * 2011-06-17 2011-12-28 林松 Intelligent and anti-electric shock safety socket

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