CN2549639Y - High voltage and large current safety device on wire distibutor - Google Patents
High voltage and large current safety device on wire distibutor Download PDFInfo
- Publication number
- CN2549639Y CN2549639Y CN 02221116 CN02221116U CN2549639Y CN 2549639 Y CN2549639 Y CN 2549639Y CN 02221116 CN02221116 CN 02221116 CN 02221116 U CN02221116 U CN 02221116U CN 2549639 Y CN2549639 Y CN 2549639Y
- Authority
- CN
- China
- Prior art keywords
- electric current
- high voltage
- thermistor
- current
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a high voltage and large current safety device on wire distributor. External line ends a and b are respectively serially connected with a heating fuse and a thermistor; one heating fuse is y connected in parallel with the serially connected resistances with high resistance value and a luminous component; and the other heating fuse is parallely connected with serially connected resistances with high resistance value and a luminous component; one thermistor is connected in parallel with a current, voltage sampling and driving circuit, and the other thermistor is parallely connected a current, voltage sampling and driving circuit; moreover, a switch SD and a light emitting diode are serially connected between a signal line S and an earthing end e; two discharging tubes SA are respectively serially connected between the switch SD and two current, voltage sampling and driving circuits and between the external line ends a and be and the earthing end e. The utility model has the advantages that when the external power invades from the external line end a or b, in particular to high voltage of the main supply or even higher than 10 thousand volt, the discharging tube discharges, and high current passes through from the external line end a or b to the earthing end e; the heating fuse blocks the external power out of the external line end and b, with high voltage and no current; the light emitting diode indicates the high voltage to the operator, thereby protecting safety of the operator; besides, apart from stable and reliable performance, the utility model has the advantages of low cost, simple structure, stable and reliable performance as well as safe operation.
Description
Technical field
The utility model is a kind of anti-high voltage on the distributing frame, big electric current protector of being used for, and can prevent the injury that person telephone office in and equipment suffer the overvoltage overcurrent, belongs to the supporting technology field of communicating by letter.
Background technology
Be used for overvoltage in the existing Security Unit, the device of overcurrent protection is all discharge tube and thermistor (PTC), a kind of structure is wherein arranged, at its outer line end a, be connected in series a thermistor (PTC) on the b respectively, and line end a outside, two discharge tubes of serial connection between the b, the contact of two discharge tubes connects ground wire, between ground wire and holding wire, serial connection alarm switch K and luminous tube, its defective is to invade from outer line end a or b end when dispatch from foreign news agency, particularly 220V civil power even 10,000 volts of above high-tension electricities are invaded, the discharge tube discharge, circuit a or b have big electric current to pass through to ground wire e end, when the big electric current of long-time existence, be easy to cause distributing frame even whole equipment room to burn; Alarm switch K is generally disposable.Also have a kind of structure in addition, promptly on the basis of said structure, also be connected in series a thermo-fuse outside on line end a, the b respectively, its resistance is one ohm.Its defective is to invade from outer line end a or b end when dispatch from foreign news agency equally, particularly 220V civil power even 10,000 volts of above high-tension electricities are invaded, the discharge tube discharge, when circuit a or b have big electric current to pass through to ground wire e end, thermo-fuse fusing makes the dispatch from foreign news agency retaining beyond outside line a, b end, and high pressure existence this moment, no current pass through, though machine room or distributing frame can not burn, but owing to do not alarm, operating personnel just are easy to meet accident when looking into fault.
Summary of the invention
The purpose of this utility model is the defective at above-mentioned existence, proposes a kind of reaching and prevents that big electric current from entering the machine room accident, can protect operator safety again simultaneously, and make the protected location of warning system composite.Technical solution of the present utility model: line end a outside, respectively be connected in series a thermo-fuse and thermistor on the b, the thermo-fuse and the high resistance measurement of serial connection mutually, luminescent device also connects, another thermo-fuse and the high resistance measurement that is connected in series mutually, luminescent device also connects, thermistor and electric current, voltage sample and drive circuit also connect, another thermistor and electric current, voltage sample and drive circuit also connect, be connected in series switch S D and light-emitting diode between holding wire S and the ground wire e, switch S D and two electric currents, voltage sample and drive circuit also connect, outer line end a, respectively be connected in series a discharge tube SA between b and ground terminal e.
The curtage that switch S D accepts to be sent here by electric current, voltage sample and drive circuit is connected ground wire and holding wire, light-emitting diode 3 work, and it can be relay or controllable silicon or amplifying circuit.Electric current, voltage sample and drive circuit are the big electric current or the big voltage of coming in the outside line gathering, and remove driving switch SD, and it can be optical coupler or instrument transformer or relay or electronic switch.
Advantage of the present utility model: when dispatch from foreign news agency is invaded from outer line end a or b end; particularly 220V civil power even 10,000 volts of above high-tension electricities are invaded; the discharge tube discharge; outer circuit a or b have big electric current to pass through to ground wire e end; thermo-fuse fusing makes the dispatch from foreign news agency retaining beyond outside line a, b end; high pressure existence this moment, no current pass through, and have high pressure to exist by luminescent device alarm prompt operating personnel, have protected operator safety.Cost price is low, simple in structure, stable and reliable for performance, safety.
Appended drawings is the utility model example structure schematic diagram
Among the figure: 1
1, 1
0Be electric current, voltage sample and drive circuit, that present embodiment is selected for use is optical coupling device (model TLP521-4), the 2nd, and thermo-fuse (resistance is 1 ohm), 3
0, 3
1Be photodiode, the 4th, thermistor (PTC) resistance is 22 Ω, R
1, R
0Be high resistance measurement 100K Ω.The 5th, it can be light-emitting diode, neon lamp, electric light etc. for a luminescent device, and what present embodiment was selected for use is light-emitting diode.SD is a switch, and what present embodiment was selected for use is that controllable silicon (model MCR100-8), SA are discharge tube (model 2SA1J).Embodiment respectively is connected in series a thermo-fuse 2 and thermistor 4 on line end a, the b outside, and thermo-fuse 2 and thermistor 4 have all that low-resistance is respectively under the normal condition＜1 Ω and≤22 Ω.The characteristics that are open circuit or high resistant (＞100K Ω) state when abnormal conditions or operating state.The thermo-fuse 2 and the high resistance measurement R of serial connection mutually
0, light-emitting diode 3
0And connect another thermo-fuse 2 and the high resistance measurement R that is connected in series mutually
1, light-emitting diode 3
1And connect thermistor 4 and optical coupling device 1
1And connect another thermistor 4 and optical coupling device 1
0And connect, when normal condition in the circuit electric current very little (＜100mA), thermo-fuse and PTC all are failure to actuate, optical coupling device and luminous tube are not all worked, and have guaranteed proper communication.Be connected in series controllable silicon SD and light-emitting diode 5, the controllable silicon effect between holding wire S and the ground wire e: be the switch that the control warning system starts.The effect of luminous tube: with the current transitions that produces in the resistance loop is light signal (warning function).The negative electrode of controllable silicon SD is with the control interpolar and connect optical coupling device 1
1With optical coupling device 1
0, optical coupling device effect: the current transitions that produces in the resistance loop is required voltage, the electric current of triggering controller.Respectively be connected in series a discharge tube SA between outer line end a, b and ground terminal e.When dispatch from foreign news agency was invaded: during (1) thunderbolt, discharge tube SA work inserted the earth with dispatch from foreign news agency, and thermo-fuse 2 and PTC do not work.(2) during induced electricity, dispatch from foreign news agency is inserted the earth thermo-fuse 2 in same SA work and PTC does not work; (3) in civil power or high-tension electricity when electricity,, when electric current exceeded normal but not enough fusing thermo-fuse, PTC work made optical coupling device 1
1With optical coupling device 1
0Work makes light-emitting diode work, and the prompting high pressure exists, and has independent alarm function.
Claims (4)
1, a kind of anti-high voltage on the distributing frame, big electric current protector of being used for is characterized in that respectively being connected in series a thermo-fuse (2) and thermistor (4) on line end a, the b outside a thermo-fuse (2) and the high resistance measurement R that is connected in series mutually
0, luminescent device (3
0) and connect another thermo-fuse (2) and the high resistance measurement R that is connected in series mutually
1, luminescent device (3
1) and connect a thermistor (4) and electric current, voltage sample and drive circuit (1
1) and connect another thermistor (4) and electric current, voltage sample and drive circuit (1
0) and connect, be connected in series switch S D and light-emitting diode (5), switch S D and electric current, voltage sample and drive circuit (1 between holding wire S and the ground wire e
1) and electric current, voltage sample and drive circuit (1
0) and connect, respectively be connected in series a discharge tube SA between outer line end a, b and ground terminal e.
2, anti-high voltage according to claim 1, big electric current protector is characterized in that switch S D can be relay or controllable silicon or amplifying circuit.
3, anti-high voltage according to claim 1, big electric current protector is characterized in that electric current, voltage sample and drive circuit (1
1), electric current, voltage sample and drive circuit (1
0) can be optical coupler or instrument transformer or relay or electronic switch.
4, anti-high voltage according to claim 1, big electric current protector is characterized in that luminescent device (3
1), (3
0) can be light-emitting diode, neon lamp, electric light etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02221116 CN2549639Y (en) | 2002-06-10 | 2002-06-10 | High voltage and large current safety device on wire distibutor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02221116 CN2549639Y (en) | 2002-06-10 | 2002-06-10 | High voltage and large current safety device on wire distibutor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2549639Y true CN2549639Y (en) | 2003-05-07 |
Family
ID=33699284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02221116 Expired - Fee Related CN2549639Y (en) | 2002-06-10 | 2002-06-10 | High voltage and large current safety device on wire distibutor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2549639Y (en) |
-
2002
- 2002-06-10 CN CN 02221116 patent/CN2549639Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| C56 | Change in the name or address of the patentee | ||
| CB03 | Change of inventor or designer information |
Designer after: Wu Jianchun Designer after: Li Xinchun Designer before: Wu Jianchun |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: DESIGNER; FROM: WU JIANCHUN TO: WU JIANCHUN, LI XINXIANG |
|
| CP03 | Change of name, title or address |
Address after: Nanjing City, Jiangsu Province, 210007 Colonel Field Road No. 16 Co-patentee after: Li Xinchun Patentee after: Wu Jianchun Address before: Nanjing City, Jiangsu Province, 210007 Colonel Field Road No. 16 Patentee before: Wu Jianchun |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |