CN104283204B - The lightning protection thermel protection device of three-phase leakage switch - Google Patents
The lightning protection thermel protection device of three-phase leakage switch Download PDFInfo
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- CN104283204B CN104283204B CN201410533716.8A CN201410533716A CN104283204B CN 104283204 B CN104283204 B CN 104283204B CN 201410533716 A CN201410533716 A CN 201410533716A CN 104283204 B CN104283204 B CN 104283204B
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Abstract
A kind of lightning protection thermel protection device of three-phase leakage switch; piezo-resistance is connected to respectively between the phase line being connected in three-phase leakage switch load end three-phase line and zero line; carry out lightning protection; the piezo-resistance overheating protection circuit being made up of temperature controller and two normally closed interlock and luminous alarm circuit is provided with every phase piezo-resistance; overtemperature protection is carried out to every phase piezo-resistance; lightning proof protection device is provided with disengaging deivce of earth leakage input, lightning protection is carried out to the electronic devices and components in disengaging deivce of earth leakage.Three-phase leakage switch and its disengaging deivce of earth leakage is made to have triple lightning protection functions such as lightning protection, overtemperature protection and lightning protection.
Description
Technical field
The present invention relates to the lightning protection thermel protection device of leakage switch technical field, more particularly to three-phase leakage switch.
Technical background
A kind of existing three-phase leakage switch（DZ47 is switched）Lightning protection device is not set, due to three-phase leakage switch and its leakage
The power supply of electric trip gear is powered by external circuit, when extraneous generation Thunderstorm Weather, often occurs to be felt because of external circuit
The impact of Ying Lei, produces high voltage and burns out the electrical equipments such as household electrical appliance or personal electric shock casualty accident occurs, give in circuit
Electrical Safety brings unsafe factor.
Additionally, lightning protection device is exactly piezo-resistance, due to long-term work in the line, heating can be caused, when pressure-sensitive
Can explode when resistance temperature is more than 120 DEG C or puncture, bring great potential safety hazard.The reason for causing piezo-resistance to heat up
There are following several respects：1. element itself is aging；2. line voltage distribution is too high；3. frequently thunderbolt causes the leakage current of piezo-resistance
Persistently increase, so as to cause piezo-resistance persistent fever to heat up.So, the overtemperature protection to piezo-resistance is also lightning protection dress
The important safety protection content that puts.
Content of the invention
It is an object of the invention to provide a kind of lightning protection thermel protection device of three-phase leakage switch, it can be leaked electricity to three-phase
Switch carries out lightning protection, and the disengaging deivce of earth leakage radial direction lightning proof to three-phase leakage switch is protected, and can be to being connected to three
Piezo-resistance on phase leakage switch load end three-phase line carries out overtemperature protection.
Technical solution proposed by the invention is such：
A kind of lightning protection thermel protection device of three-phase leakage switch, including the disengaging deivce of earth leakage of three-phase leakage switch 13
12, electrical structure identical lightning protection Thermal protection dress is connected between the three-phase and zero line of 13 load end of three-phase leakage switch
Put, the lightning protection thermel protection device by piezo-resistance 6, temperature controller 7 and its 1st normally closed interlock 5, the 2nd normally closed interlock 8 and lights
Warning circuit constitutes, and 6 one end of piezo-resistance is connected with phase line, and 6 other end of piezo-resistance is connected and be connected with the 2nd normally closed interlock 8
On zero line, 5 one end of the 1st normally closed interlock is connected with phase line with after luminous alarm circuit connected in series, 5 other end of the 1st normally closed interlock with
Zero line connects；The 1st piezo-resistance 11,11 one end of the 1st piezo-resistance and the 1st are connected in parallel in 12 input of disengaging deivce of earth leakage
Decoupling inductance 10 connect after be connected with phase line, 11 other end of the 1st piezo-resistance connect with the 2nd decoupling inductance 14 after with zero line phase
Connection.
The diode 2 that the luminous alarm circuit is connected by current-limiting resistance 1 and homopolarity, light emitting diode 3 are in series.?
Discharge tube 9 is connected between zero line and ground wire.
Compared with prior art, the present invention has following remarkable result：
（1）Due to being connected to pressure-sensitive electricity respectively between the phase line on three-phase leakage switch load end three-phase line and zero line
Resistance, the electrical equipment to three-phase leakage switch load end carry out lightning protection.
（2）As piezo-resistance of the long-term work in alive circuit occurs fever phenomenon, when piezo-resistance temperature is super
Blast can be likely to occur when crossing 120 DEG C or be punctured, bring great potential safety hazard.The present invention is provided with pressure-sensitive in three-phase line
Electrical resistance overheats protection circuit, carries out overtemperature protection to piezo-resistance, when piezo-resistance temperature rise reaches preset value, such as 120 DEG C
When, temperature controller action, light emitting diode are extinguished, and warning maintainer is carried out to involved piezo-resistance and associate power circuit
Measuring error, excludes all potential safety hazards early.
（3）The 1st piezo-resistance is terminated with disengaging deivce of earth leakage input carries out lightning protection to which, in the 1st piezo-resistance
Two ends are connected after a decoupling inductance respectively and are connected with phase line or zero line.The effect of the two decoupling inductance is to work as to meet one relatively
It is three piezo-resistances on three-phase line that big thunder and lightning is accepted at first, and the lag time that decoupling inductance is produced makes the 1st pressure-sensitive
Resistance avoids this larger thunder and lightning, so that the electronic devices and components in disengaging deivce of earth leakage are without damage.
Description of the drawings
Fig. 1 is that a kind of electric principle of the lightning protection thermel protection device of three-phase leakage switch of one embodiment of the invention is illustrated
Figure.
Specific embodiment
The present invention is further elaborated by example below.
Shown in Figure 1, a kind of lightning protection thermel protection device of three-phase leakage switch is by being connected to three-phase leakage switch 13
The lightning protection thermel protection device of the electrical structure between the three-phase of load end and zero line and be located at three-phase leakage switch 13 electric leakage thread off
The lightning proof protection device composition of 12 input of device.Lightning protection thermel protection device is normal by piezo-resistance 6, temperature controller 7 and its 1st
Contact 5, the 2nd normally closed interlock 8 and luminous alarm circuit composition is closed, 6 one end of piezo-resistance is connected with phase line L, and piezo-resistance 6 is another
End is connected with the 2nd normally closed interlock 8 and is connected on zero line N, with phase after 5 one end of the 1st normally closed interlock and luminous alarm circuit connected in series
Line L connects, and 5 other end of the 1st normally closed interlock is connected with zero line N, luminous alarm circuit by current-limiting resistance 1, diode 2, light two
Pole pipe 3 constitutes, and 1 one end of current-limiting resistance is connected with phase line L, and 1 other end of current-limiting resistance is connected with 2 positive pole of diode, and diode 2 is negative
Pole is connected with 3 positive pole of light emitting diode, and 3 negative pole of light emitting diode is connected with 5 one end F1 of the 1st normally closed interlock, and normally closed interlock 5 is another
End F2 is connected with zero line N.Piezo-resistance 6 is close in the temperature-sensitive face of temperature controller 7.
Lightning proof device is terminated with the input of disengaging deivce of earth leakage 12 of three-phase leakage switch 13, the device is pressed by the 1st
Quick resistance 11 and the 1st decoupling inductance 10, the 2nd decoupling inductance 14 are in series, and 10 one end of the 1st decoupling inductance is connected with phase line L, its
The other end is connected with 11 one end of the 1st piezo-resistance, and 11 other end of the 1st piezo-resistance is connected with 14 one end of the 2nd decoupling inductance, and the 2nd
14 other end of decoupling inductance is connected with zero line N, and 12 input of disengaging deivce of earth leakage is connected in parallel with the 1st piezo-resistance 11.
In the present embodiment, piezo-resistance 6 chooses 621 piezo-resistances, and specified leakage current 20KA, the piezo-resistance are breakdown
Both end voltage is about 1000V afterwards；1st piezo-resistance 11 chooses 561 piezo-resistances, specified leakage current 3KA, the piezo-resistance quilt
Puncture rear both end voltage and be about 700V.1st decoupling inductance 10 and the 2nd decoupling inductance 14 all choose 15 μ H, and its lag time is about
100ns.
When a larger thunderbolt is run into, the lag time that decoupling inductance is produced makes the 1st piezo-resistance 11 circumvent this
Thunderbolt, when then running into less thunderbolt again, even if breakdown, is about 700V, disengaging deivce of earth leakage 12 because puncturing rear both end voltage
Interior electronic devices and components can bear, and will not damage.
Under normal operating conditions, the light emitting diode 3 in lightning protection thermel protection device is shinny, represents the thermistor work shape
State is normal, when thermistor is generated heat and exceedes preset value because of aforementioned a variety of causes, 7 action of temperature controller, and the 1st normally closed interlock 5, the
2 normally closed interlocks 8 are opened, and light emitting diode 3 extinguishes, and warning maintainer needs to carry out the piezo-resistance and intersecting line conditions
Detection, to exclude various potential safety hazards.
The effect for being connected to discharge tube 9 between zero line N and ground wire PE is electric for leakage during thunderbolt from three-phase piezo-resistance
Stream provides a Grounding, and discharge tube 9 has the leakage current ability equivalent to 60KA.
Claims (3)
1. a kind of lightning protection thermel protection device of three-phase leakage switch, including three-phase leakage switch（13）Disengaging deivce of earth leakage
（12）, it is characterised in that：In three-phase leakage switch（13）Electrical structure phase is connected between the three-phase of load end and zero line
Same lightning protection thermel protection device, the lightning protection thermel protection device is by piezo-resistance（6）, temperature controller（7）And its 1st normally closed interlock
（5）, the 2nd normally closed interlock（8）And luminous alarm circuit composition, piezo-resistance（6）One end is connected with phase line, piezo-resistance（6）
The other end and the 2nd normally closed interlock（8）Connect and be connected on zero line, the 1st normally closed interlock（5）One end and luminous alarm circuit connected in series
It is connected with phase line afterwards, the 1st normally closed interlock（5）The other end is connected with zero line；In disengaging deivce of earth leakage（12）Input is connected in parallel
There is the 1st piezo-resistance（11）, the 1st piezo-resistance（11）One end and the 1st decoupling inductance（10）It is connected with phase line after series connection, the 1st
Piezo-resistance（11）The other end and the 2nd decoupling inductance（14）It is connected with zero line after series connection.
2. the lightning protection thermel protection device of three-phase leakage switch according to claim 1, it is characterised in that：The luminous report
Alert circuit is by current-limiting resistance（1）Diode with homopolarity series connection（2）, light emitting diode（3）It is in series.
3. the lightning protection thermel protection device of three-phase leakage switch according to claim 1, it is characterised in that：On zero line and ground
Discharge tube is connected between line（9）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410533716.8A CN104283204B (en) | 2014-10-11 | 2014-10-11 | The lightning protection thermel protection device of three-phase leakage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410533716.8A CN104283204B (en) | 2014-10-11 | 2014-10-11 | The lightning protection thermel protection device of three-phase leakage switch |
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| Publication Number | Publication Date |
|---|---|
| CN104283204A CN104283204A (en) | 2015-01-14 |
| CN104283204B true CN104283204B (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410533716.8A Active CN104283204B (en) | 2014-10-11 | 2014-10-11 | The lightning protection thermel protection device of three-phase leakage switch |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2404246Y (en) * | 1999-12-23 | 2000-11-01 | 杨金夕 | Lightning-protection earth leakage protective device |
| CN101752858A (en) * | 2009-06-10 | 2010-06-23 | 东莞市新铂铼电子有限公司 | Multi-gap metal gas discharge tube power supply over-voltage protection module |
| CN204118729U (en) * | 2014-10-11 | 2015-01-21 | 广东佛电电器有限公司 | The lightning protection thermel protection device of three-phase leakage switch |
-
2014
- 2014-10-11 CN CN201410533716.8A patent/CN104283204B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2404246Y (en) * | 1999-12-23 | 2000-11-01 | 杨金夕 | Lightning-protection earth leakage protective device |
| CN101752858A (en) * | 2009-06-10 | 2010-06-23 | 东莞市新铂铼电子有限公司 | Multi-gap metal gas discharge tube power supply over-voltage protection module |
| CN204118729U (en) * | 2014-10-11 | 2015-01-21 | 广东佛电电器有限公司 | The lightning protection thermel protection device of three-phase leakage switch |
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| Publication number | Publication date |
|---|---|
| CN104283204A (en) | 2015-01-14 |
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