CN205335835U - Photovoltaic equipment is with section lightning protection block terminal under TN -S power supply system - Google Patents
Photovoltaic equipment is with section lightning protection block terminal under TN -S power supply system Download PDFInfo
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- CN205335835U CN205335835U CN201620031068.0U CN201620031068U CN205335835U CN 205335835 U CN205335835 U CN 205335835U CN 201620031068 U CN201620031068 U CN 201620031068U CN 205335835 U CN205335835 U CN 205335835U
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Abstract
The utility model discloses a photovoltaic equipment is with section lightning protection block terminal under TN -S power supply system, including the lightning protection block terminal body lightning protection circuit inside with being located lightning protection block terminal body, the lightning protection circuit is including parallelly connected to the L line of commercial power and the one -level lightning protection module between the N line, and wherein one -level lightning protection module is piezo -resistor subassembly MOV1, the piezo -resistor subassembly comprises fusing protector and the piezo -resistor who establishes ties, the one end of protector of wherein fusing inserts the L line, piezo -resistor one end is connected to the N line, piezo -resistor MOV1 still is connected with the gas discharge tube GDT1 who establishes ties in proper order with the contact point of N line, choking coil U1, gas discharge tube GDT1's output is connected with choking coil U1's main coil input, the PE line is connected to choking coil U1's main coil output, wherein choking coil U1's secondary coil is connected with count display device JSQ, gas discharge tube GDT1, choking coil U1 constitutes second grade lightning protection module, the utility model discloses can prevent the harm that the lightning current caused the consumer effectively.
Description
Technical field
This utility model relates to over-voltage protection technology, more specifically, it relates to photovoltaic apparatus section lightning-protection distribution box under a kind of TN-S electric power system。
Background technology
At present total power distribution cabinet on the market or distribution box (dish) large area use, but do not have a kind of distribution box can be used in the special civil power of photovoltaic specially。The ripple brought by conventional electrical box will make LED power bear bigger surge peak value, thus reducing the service life of photovoltaic apparatus。
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is in that to provide photovoltaic apparatus section lightning-protection distribution box under a kind of TN-S electric power system, can be effectively prevented the harm that electrical equipment is caused by lightning current。
For achieving the above object, this utility model provides following technical scheme:
Photovoltaic apparatus section lightning-protection distribution box under a kind of TN-S electric power system, including lightning-protection distribution box body and the lightning protection circuit being positioned at lightning-protection distribution box body interior, described lightning protection circuit includes the one-level lightning-protection module being parallel between the L line of civil power and N line, wherein one-level lightning-protection module is varistor assembly MOV1, described varistor assembly is made up of the fusing safeguard connected and varistor, wherein fuse safeguard one end access L line, varistor one end is connected to N line, the contact point of varistor MOV1 and N line is also associated with the gas-discharge tube GDT1 being sequentially connected in series, choking-winding U1, the outfan of gas-discharge tube GDT1 is connected with the main coil input of choking-winding U1, the main coil outfan of choking-winding U1 connects PE line, wherein the secondary coil of choking-winding U1 is connected to counting display device JSQ, gas-discharge tube GDT1, choking-winding U1 constitutes two grades of lightning-protection modules；Described counting display device JSQ includes:
Signal conversion module, is coupled to the secondary coil of choking-winding U1, for the alternating voltage of the secondary coil flowing through choking-winding U1 is changed to DC voltage；
Signal output module, in response to described DC voltage, output detects signal accordingly；
Counter module, has a display device, and described counter module counts once in response to described detection signal, and is shown by display device。
Further, described signal conversion module includes:
Bleeder circuit, for described alternating voltage carries out dividing potential drop, generates voltage division signal；
Rectification circuit, for being converted to DC voltage by described voltage division signal；
And filter circuit, for described DC voltage is filtered。
Further, described signal output module includes:
Bias voltage generating circuit, in response to described DC voltage, generates a bias voltage；
Switching tube, turns in response to described bias voltage, and output detects signal accordingly。
Further, described counter module includes MCU and charactron, and an input pin of described MCU is coupled to a pin of described switching tube, to receive described detection signal；The output pin of described MCU is coupled to described charactron。
Further, described fusing safeguard is remote signalling output fusing safeguard, and the remote signalling outfan of fusing safeguard is connected to remote signalling display device by binding post P；Counting display device JSQ and the combination of remote signalling display device constitute data viewer。
Further, the model of varistor assembly MOV1 is MOV620。
Further, the breakdown current of gas-discharge tube GDT1 is 30K ampere to 26K ampere。
Compared with prior art, the utility model has the advantages that: by above technical scheme, use high-power lightning-protection module, thunder and lightning through-current capacity is big, fast response time, and barrier propterty is good, and security performance is high。
Accompanying drawing explanation
Fig. 1 is integrated circuit figure of the present utility model；
Fig. 2 is the circuit diagram of counting display device in this utility model。
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited only to this。
With reference to Fig. 1, photovoltaic apparatus section lightning-protection distribution box under a kind of TN-S electric power system, including lightning-protection distribution box body and the lightning protection circuit being positioned at lightning-protection distribution box body interior, lightning protection circuit includes the one-level lightning-protection module being parallel between the L line of civil power and N line, wherein one-level lightning-protection module is varistor assembly MOV1, varistor assembly is made up of the fusing safeguard connected and varistor, wherein fuse safeguard one end access L line, varistor one end is connected to N line, the contact point of varistor MOV1 and N line is also associated with the gas-discharge tube GDT1 being sequentially connected in series, choking-winding U1, the outfan of gas-discharge tube GDT1 is connected with the main coil input of choking-winding U1, the main coil outfan of choking-winding U1 connects PE line, wherein the secondary coil of choking-winding U1 is connected to counting display device JSQ, gas-discharge tube GDT1, choking-winding U1 constitutes two grades of lightning-protection modules。
In the present embodiment, the model of varistor assembly MOV1 is preferably MOV620, and the breakdown current of gas-discharge tube GDT1 is 30K ampere to 26K ampere。
This device accesses L line and the N line of civil power, this device and the load accessing civil power run through parallel relationship, when the L line of civil power and N line are normal voltage and electric current, varistor assembly MOV1 is off all the time, now, one-level lightning-protection module and two grades of lightning-protection modules are in off position, the lightning-protection distribution box of this device design is in failure state, when L line and the N line of civil power are overcurrent and overvoltage, such as, after thunderbolt voltage x current enters L line and the N line of civil power, namely when the L line of lightning current civil power from circuit and N line are scurried into, voltage between lines is lifted to the startup voltage location of varistor, varistor is started working, the lightning voltage flowing through varistor is clamped down under the protection voltage levvl that pressure surface resistance specifies。Along with lightning current continues into system, and varistor is about to reach capacity during state, now the lightning voltage of system reaches the conducting voltage level of gas-discharge tube GDT1, gas-discharge tube GDT1 punctures the rare gas of inside and starts electric discharge, and the thunder energy on line is imported PE line, it is being released to ground via the bus-bar of distribution box, is blocking the electric current entering load, it is ensured that load is not by broken by lightning。Whenever by the lightning current of choking-winding U1 more than a certain value, counting display device JSQ counts 1 time, and a certain value is generally 2.6KA to 3KA, and this standard is thunder-strike current standard, and therefore this device can also count number of lightning strokes。
Signal conversion module, signal output module sum counter module is included with reference to Fig. 2, counting display device JSQ；Wherein, signal conversion module is coupled to the secondary coil of choking-winding U1, for the alternating voltage of the secondary coil flowing through choking-winding U1 is changed to DC voltage；Signal output module, in response to DC voltage, output detects signal accordingly；Counter module, has a display device, and counter module counts once in response to detection signal, and is shown by display device。
Below, it is specifically described for above-mentioned modules:
Signal conversion module includes bleeder circuit, rectification circuit and filter circuit；Wherein, it is adjustable resistance that bleeder circuit includes resistance R2 and resistance RX, resistance RX, and one end of resistance R2 is coupled to one end of the secondary coil of choking-winding U1, first end of the other end and resistance RX couples, and the other end of the secondary coil of the 3rd end end of resistance R2 and the second end and choking-winding U1 couples；Therefore, the voltage that the secondary coil of choking-winding U1 produces, after resistance RX, obtains voltage division signal, it addition, the secondary coil of choking-winding U1 is parallel with electric capacity C1, to delay and to reduce the inverse electromotive force of coil, reduces interference。Rectification circuit includes the rectifier bridge being made up of diode D3～D6, and its input is respectively coupled to resistance R2 and resistance RX, and then the voltage division signal of acquisition is converted to DC voltage。It addition, the outfan of rectifier bridge is coupled with diode D1 and the D2 of series connection, mainly serves the effect of protection postorder circuit, when the output voltage of rectifier bridge is too high, diode D1 and D2 is punctured, flow into earth terminal。Filter circuit includes resistance R3, resistance R4 and electric capacity C2, and one end of resistance R4 is coupled to the outfan of rectifier bridge, and other end ground connection couples with resistance R3 and electric capacity C2 respectively, the other end ground connection of resistance R3 and electric capacity C2。
Signal output module includes bias voltage generating circuit and switching tube；Wherein, bias voltage generating circuit includes Zener diode Z1, diode D7, resistance R5 and electric capacity C3, the negative electrode coupling of Zener diode Z1 is used for receiving described DC voltage, anode is coupled to the negative electrode of diode D7, the plus earth of diode D7, electric capacity C3 is in parallel with Zener diode Z1, and resistance R5 is in parallel with diode D7。Switching tube includes NPN audion Q1, and its base stage is coupled to resistance R5, grounded emitter, and colelctor electrode is coupled to counter module by Zener diode Z2。Therefore, when rectifier bridge exports DC voltage, the cathode voltage of Zener diode Z1 raises, and when exceeding its voltage stabilizing value, Z1 punctures, and Q1 turns on, and Zener diode Z2 punctures。
Counter module includes MCU and charactron, and an input pin (P1.0) of MCU is coupled to Zener diode Z2, to receive detection signal；The output pin (P2.0～P2.7) of MCU is coupled to the pin (a～dp) of charactron。Therefore, MCU often receives one-time detection signal, just counts once, and by numeral method count results。
It addition, as the improvement of above-described embodiment, in this utility model, fusing safeguard is remote signalling output fusing safeguard, and the remote signalling outfan of fusing safeguard is connected to remote signalling display device by binding post P；Counting display device JSQ and the combination of remote signalling display device constitute data viewer。Data viewer can manual switching display counting display device JSQ and the data of remote signalling display device。
Claims (6)
1. photovoltaic apparatus section lightning-protection distribution box under a TN-S electric power system, it is characterized in that: include lightning-protection distribution box body and be positioned at the lightning protection circuit of lightning-protection distribution box body interior, described lightning protection circuit includes the one-level lightning-protection module being parallel between the L line of civil power and N line, wherein one-level lightning-protection module is varistor assembly MOV1, described varistor assembly is made up of the fusing safeguard connected and varistor, wherein fuse safeguard one end access L line, varistor one end is connected to N line, the contact point of varistor MOV1 and N line is also associated with the gas-discharge tube GDT1 being sequentially connected in series, choking-winding U1, the outfan of gas-discharge tube GDT1 is connected with the main coil input of choking-winding U1, the main coil outfan of choking-winding U1 connects PE line, wherein the secondary coil of choking-winding U1 is connected to counting display device JSQ, gas-discharge tube GDT1, choking-winding U1 constitutes two grades of lightning-protection modules；Described counting display device JSQ includes:
Signal conversion module, is coupled to the secondary coil of choking-winding U1, for the alternating voltage of the secondary coil flowing through choking-winding U1 is changed to DC voltage；
Signal output module, in response to described DC voltage, output detects signal accordingly；
Counter module, has a display device, and described counter module counts once in response to described detection signal, and is shown by display device；
Described signal conversion module includes:
Bleeder circuit, for described alternating voltage carries out dividing potential drop, generates voltage division signal；
Rectification circuit, for being converted to DC voltage by described voltage division signal；
And filter circuit, for described DC voltage is filtered。
2. photovoltaic apparatus section lightning-protection distribution box under TN-S electric power system according to claim 1, is characterized in that, described signal output module includes:
Bias voltage generating circuit, in response to described DC voltage, generates a bias voltage；
Switching tube, turns in response to described bias voltage, and output detects signal accordingly。
3. photovoltaic apparatus section lightning-protection distribution box under TN-S electric power system according to claim 2, it is characterized in that, described counter module includes MCU and charactron, and an input pin of described MCU is coupled to a pin of described switching tube, to receive described detection signal；The output pin of described MCU is coupled to described charactron。
4. photovoltaic apparatus section lightning-protection distribution box under TN-S electric power system according to claim 1, is characterized in that, described fusing safeguard is remote signalling output fusing safeguard, and the remote signalling outfan of fusing safeguard is connected to remote signalling display device by binding post P；Counting display device JSQ and the combination of remote signalling display device constitute data viewer。
5. photovoltaic apparatus section lightning-protection distribution box under TN-S electric power system according to claim 1, is characterized in that, the model of varistor assembly MOV1 is MOV620。
6. photovoltaic apparatus section lightning-protection distribution box under TN-S electric power system according to claim 1, is characterized in that, the breakdown current of gas-discharge tube GDT1 is 30K ampere to 26K ampere。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620031068.0U CN205335835U (en) | 2016-01-13 | 2016-01-13 | Photovoltaic equipment is with section lightning protection block terminal under TN -S power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620031068.0U CN205335835U (en) | 2016-01-13 | 2016-01-13 | Photovoltaic equipment is with section lightning protection block terminal under TN -S power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205335835U true CN205335835U (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620031068.0U Active CN205335835U (en) | 2016-01-13 | 2016-01-13 | Photovoltaic equipment is with section lightning protection block terminal under TN -S power supply system |
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| Country | Link |
|---|---|
| CN (1) | CN205335835U (en) |
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- 2016-01-13 CN CN201620031068.0U patent/CN205335835U/en active Active
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