CN107492881A - Blanking power supply protection device over the ground - Google Patents
Blanking power supply protection device over the ground Download PDFInfo
- Publication number
- CN107492881A CN107492881A CN201710820653.8A CN201710820653A CN107492881A CN 107492881 A CN107492881 A CN 107492881A CN 201710820653 A CN201710820653 A CN 201710820653A CN 107492881 A CN107492881 A CN 107492881A
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- CN
- China
- Prior art keywords
- blanking
- ground
- resistance
- power supply
- protection device
- 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.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
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- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention provides a kind of blanking power supply protection device over the ground.It includes the sequentially supply line of access, over the ground blanking module, broken-circuit controller, loaded line；The module of blanking over the ground is provided with residual current detector, variable ratio frequency changer electronic switch, blanking resistance, intelligent IC, the L lines (live wire) and N lines (zero line) of the supply line are electrically connected a variable ratio frequency changer electronic switch, and the other end of the variable ratio frequency changer electronic switch passes through blanking resistance eutral grounding；The intelligent IC can adjust the resistance size of blanking resistance；The intelligent IC comprises at least a residual current detection circuit, a variable ratio frequency changer electronic switch frequency conversion control circuit, a blanking resistance control circuit, a breaking control circuit.The power supply protection device load end is by setting blanking module over the ground so that when load end live wire and zero line contact people and animals and be grounded by people and animals, the shock current for influenceing personal safety will not be formed by people and animals and the earth, so as to reach the purpose of safety utilization of electric power.
Description
Technical field
The present invention relates to safety utilization of electric power technical field, particularly a kind of load end security is good, people and animals will not be caused to get an electric shock
The blanking power supply protection device over the ground of accident.
Background technology
The development and application of electric power has been human civilization and hair to electric power now since the mankind in 1831 have found electromagnetic induction
Open up indispensable important conversion energy presentation mode.Domestic electrical is since Shanghai First electrical power generators in 1882, directly
To after the foundation of new China, Chinese electric power network is just able to the development advanced by leaps and bounds, nuclear energy, waterpower, wind-force, firepower,
The fields such as solar energy, tide energy achieve achievement highly visible now.And in a manner of energy-saving and environmental protection, the effective supply of safety
Huge numbers of families are sent into, while providing endless convenient for the production of people's people's livelihood, life, is national economy, the realization of Chinese dream, serves
Irreplaceable guaranteeing role.However, because electric power network is quite remote to huge numbers of families' tail end line from generating, conveying, distribution
Away from this process, in order to avoid the balance in effects of lightning and guarantee circuit between voltage, generator, power transformer are all
Employ neutral grounded mode, the earth and each phase voltage is all formd loop, as long as therefore big ground arbitrfary point
There is contact to produce electromotive force with L lines (live wire), electric leakage forms current loop, and the thing such as electric wire and ground sparking, electric shock easily occurs
Therefore.In existing safeguard measure, each distribution system and client have all loaded onto earth leakage protective device, but earth leakage protective device must produce
The electric current that raw electric leakage forms 220V or 380V 30mA can just act open circuit, and be influenceed by power network electricity consumption feedback current etc., open circuit
And earth leakage protective reaction is unstable, not in time, easily causes potential safety hazard.
The content of the invention
The purpose of the present invention is that the accident such as electric wire and ground sparking, electric shock occurs for existing load end supply lines Louis, is supplied
The deficiency of electric security difference, there is provided a kind of blanking power supply protection device over the ground, the power supply protection device load end pass through setting pair
Ground blanking module so that when load end live wire and zero line contact people and animals and be grounded by people and animals, people and animals and megarelief will not be passed through
Into the shock current for influenceing personal safety, so as to reach the purpose of safety utilization of electric power, in addition, controlling open circuit control by intelligent IC
Device, tripping action voltage and tripping action electric current are small.
In order to solve above-mentioned prior art problem, the technical scheme is that:
Blanking power supply protection device over the ground of the invention, it includes the supply line of order access, blanking module, open circuit over the ground
Controller, loaded line；
The module of blanking over the ground is provided with residual current detector, variable ratio frequency changer electronic switch, blanking resistance, intelligent IC,
The L lines (live wire) and N lines (zero line) of the supply line are electrically connected a variable ratio frequency changer electronic switch, the variable ratio frequency changer electronic cutting
The other end of pass passes through blanking resistance eutral grounding；
The intelligent IC can adjust the resistance size of blanking resistance；
The intelligent IC comprises at least a residual current detection circuit, a variable ratio frequency changer electronic switch frequency conversion control circuit, one
Blanking resistance control circuit, a breaking control circuit；
The residual current detection circuit is preferably residual current transformer；
The Standard resistance range of the blanking resistance is the Ω of 0.3 Ω~1.0；
The frequency of the variable ratio frequency changer electronic switch is more than 50HZ；
The power supply circuit is exchange 380V or alternating current 220V.
The course of work：The residual current size of residual current detector is detected by intelligent IC, when residual current minimum,
Now load end does not leak electricity, feeder ear potential balance, and intelligent IC adjustment blanking resistance reaches maximum, while intelligent IC controls
The frequency of variable ratio frequency changer electronic switch is 100HZ；When residual current rises, now load end has external electrical contact (such as people and animals
Trolley wire), intelligent IC adjustment blanking resistance, blanking resistance is diminished, while intelligent IC control variable ratio frequency changer electronic switch
Frequency be more than 100HZ；When load end live wire and zero line direct short-circuit are leaked electricity, residual current now is more than set safety
Value, intelligent IC control broken-circuit controller open circuit.
Blanking power supply protection device, then can by intelligent IC control by differentiating the feature of residual current over the ground by the present invention
The frequency of freq-variable electronic switch so that the break-make frequency of live wire and zero line and the earth blanking circuit is more than 50HZ, and can carry automatically
Height, as load end live wire and zero line contact people and animals and when being grounded by people and animals, its grounding resistance can be more than the resistance of blanking resistance,
So as to which load end will not form the shock current of influence personal safety by people and animals and the earth, electric shock accidents will not be caused；In addition,
When load end live wire and zero line direct short-circuit are leaked electricity, residual current now is more than set safety value, intelligent IC control open circuit
Controller open circuit, operation voltage now are less than 30mA less than 36V, action current.
Blanking power supply protection device, its advantage have one kind of the invention over the ground：
1st, the power supply protection device load end is by setting blanking module over the ground so that load end live wire and zero line contact people
When raiseeing and being grounded by people and animals, the shock current for influenceing personal safety will not be formed by people and animals and the earth, so as to reach safety
The purpose of electricity consumption；
2nd, it is small less than 36V, action current by intelligent IC control broken-circuit controller, the operation voltage of load end short-circuit protection
It is safer in 30mA, open circuit protection high sensitivity, power supply circuit；
3rd, voltage is more stable, and when particularly accessing high power load, the influence to system voltage is smaller.
Brief description of the drawings
Fig. 1, it is the schematic diagram of blanking power supply protection device (civil power is three-phase AC220V) over the ground of the invention.
Embodiment
With reference to embodiment, the invention will be further described：
Embodiment
Blanking power supply protection device over the ground of the invention, its supply line 1 including order access, over the ground blanking module 2, break
Road controller 3, loaded line 4；
The module of blanking over the ground 2 be provided with residual current detector 21, variable ratio frequency changer electronic switch 22, blanking resistance 23,
Intelligent IC 24, the L lines (live wire) and N lines (zero line) of the supply line are electrically connected a variable ratio frequency changer electronic switch, it is described can
The other end of freq-variable electronic switch passes through blanking resistance eutral grounding；
The intelligent IC can adjust the resistance size of blanking resistance；
The intelligent IC comprises at least a residual current detection circuit, a variable ratio frequency changer electronic switch frequency conversion control circuit, one
Blanking resistance control circuit, a breaking control circuit；
The residual current detection circuit is preferably residual current transformer；
The Standard resistance range of the blanking resistance is the Ω of 0.3 Ω~1.0；
The frequency of the variable ratio frequency changer electronic switch is more than 50HZ；
The power supply circuit is alternating current 220V.
The present invention is described in detail above, described above, only the preferred embodiments of the invention, when can not
Limit the scope of the present invention, i.e., it is all to make equivalent changes and modifications according to the application scope, it all should still belong to covering scope of the present invention
It is interior.
Claims (6)
1. blanking power supply protection device over the ground, it is characterised in that its supply line including order access, over the ground blanking module,
Broken-circuit controller, loaded line；
The module of blanking over the ground is provided with residual current detector, variable ratio frequency changer electronic switch, blanking resistance, intelligent IC, described
The L lines (live wire) and N lines (zero line) of supply line are electrically connected a variable ratio frequency changer electronic switch, the variable ratio frequency changer electronic switch
The other end passes through blanking resistance eutral grounding；
The intelligent IC can adjust the resistance size of blanking resistance；
The intelligent IC comprises at least a residual current detection circuit, a variable ratio frequency changer electronic switch frequency conversion control circuit, a blanking
Resistance control circuit, a breaking control circuit.
2. blanking power supply protection device over the ground according to claim 1, it is characterised in that the residual current detection circuit
Preferably residual current transformer.
3. blanking power supply protection device over the ground according to claim 1, it is characterised in that the resistance model of the blanking resistance
Enclose for the Ω of 0.3 Ω~1.0.
4. blanking power supply protection device over the ground according to claim 1, it is characterised in that the variable ratio frequency changer electronic switch
Frequency is more than 50HZ.
5. blanking power supply protection device over the ground according to claim 1, it is characterised in that the power supply circuit is exchange
380V or alternating current 220V.
6. blanking power supply protection device over the ground according to claim 1, it is characterised in that the load end earth leakage protective is opened
The operation voltage of pass is less than or equal to safe voltage 36V, action current is less than 30mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710820653.8A CN107492881A (en) | 2017-09-13 | 2017-09-13 | Blanking power supply protection device over the ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710820653.8A CN107492881A (en) | 2017-09-13 | 2017-09-13 | Blanking power supply protection device over the ground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107492881A true CN107492881A (en) | 2017-12-19 |
Family
ID=60652281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710820653.8A Pending CN107492881A (en) | 2017-09-13 | 2017-09-13 | Blanking power supply protection device over the ground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107492881A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201210614Y (en) * | 2008-05-23 | 2009-03-18 | 陈家斌 | Residual current controlling and monitoring protector |
| CN201243193Y (en) * | 2008-07-03 | 2009-05-20 | 陈家斌 | Low-voltage electric network residual current control monitoring type protector |
| CN102097780A (en) * | 2011-01-31 | 2011-06-15 | 赵长城 | Electric shock and electric leakage protection device for low voltage power grid |
| CN206481041U (en) * | 2017-02-16 | 2017-09-08 | 厦门九华通信设备厂 | A kind of communication truck residual current protection detects circuit structure |
-
2017
- 2017-09-13 CN CN201710820653.8A patent/CN107492881A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201210614Y (en) * | 2008-05-23 | 2009-03-18 | 陈家斌 | Residual current controlling and monitoring protector |
| CN201243193Y (en) * | 2008-07-03 | 2009-05-20 | 陈家斌 | Low-voltage electric network residual current control monitoring type protector |
| CN102097780A (en) * | 2011-01-31 | 2011-06-15 | 赵长城 | Electric shock and electric leakage protection device for low voltage power grid |
| CN206481041U (en) * | 2017-02-16 | 2017-09-08 | 厦门九华通信设备厂 | A kind of communication truck residual current protection detects circuit structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171219 |