CN206422520U - The counterflow-preventing protection device of photovoltaic system - Google Patents
The counterflow-preventing protection device of photovoltaic system Download PDFInfo
- Publication number
- CN206422520U CN206422520U CN201720096040.XU CN201720096040U CN206422520U CN 206422520 U CN206422520 U CN 206422520U CN 201720096040 U CN201720096040 U CN 201720096040U CN 206422520 U CN206422520 U CN 206422520U
- Authority
- CN
- China
- Prior art keywords
- output end
- inverter
- contactor
- counterflow
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses the counterflow-preventing protection device of photovoltaic system; its inverter for including with photovoltaic panel output end being connected by photovoltaic cable, the AC circuit breaker being connected by four lines with the inverter output end, the A.C. contactor being connected by the triple line in four lines with the AC circuit breaker output end; on the one hand the output end of the A.C. contactor connects electrical equipment, and on the other hand the earth terminal with the inverter is grounded by diode.The utility model can effectively prevent adverse current, the reverse breakdown equipment such as lightning current be prevented, so as to protect electrical equipment.
Description
Technical field
The utility model is related to solar energy power generating application field.
Background technology
Photovoltaic generating system is made up of equipment such as photovoltaic panel square formation, batteries, AC power distribution cabinet/AC distribution panels, and photovoltaic panel is big
The place on roof more installed outdoors or spaciousness, in photovoltaic generating system, inverter and distribution box are required for effective grounding
It can normally run, but be worked under the high electric fields such as thunder and lightning, is readily damaged.
Utility model content
The purpose of this utility model is to provide a kind of lightning protection, the protection device of the photovoltaic system of counterflow-preventing.
To achieve the above object, the utility model uses following technical scheme：
The counterflow-preventing protection device of photovoltaic system, it includes with photovoltaic panel output end being connected by photovoltaic cable
Inverter, be connected by four lines with the inverter output end AC circuit breaker, by the triple line in four lines with it is described
On the one hand the connected A.C. contactor of AC circuit breaker output end, the output end of the A.C. contactor connects electrical equipment, separately
On the one hand the earth terminal with the inverter is grounded by diode.
The output end of the A.C. contactor is connected to electrical equipment by inversion AC isolation switch.
The AC380V coils of the A.C. contactor connect the output end of any two phase lines.
After adopting the above technical scheme, the utility model is compared with background technology, have the following advantages that：
When the utility model inverter and the electric current of grid connection box flow through grounding copper bar, electric current is unidirectionally exported.Prevent thunder and lightning
The reverse breakdown equipment such as stream, cause harm to equipment, protection inverter and grid connection box.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
Embodiment
Referring to Fig. 1, the utility model discloses a kind of counterflow-preventing protection device of photovoltaic system, it includes passing through photovoltaic
Inverter that cable is connected with photovoltaic panel output end, the alternating current interruption being connected by four lines with inverter output end
Device, the A.C. contactor being connected by the triple line L of four lines with AC circuit breaker output end, the side of output end one of A.C. contactor
Face connects other electrical equipments by inversion AC isolation switch, is on the other hand grounded by diode, the ground connection of inverter
End is grounded also by diode.
The operation principle of the utility model protection device is：Solar energy power generating output end passes through 4 × 4mm2Photovoltaic
Cable is connected to inverter, and the direct current that photovoltaic is inputted is converted into three-phase alternating current electricity output by inverter, i.e., using three-phase and four-line
System power supply；The three-phase alternating current of inversion is output to the AC circuit breaker with four-way by inverter by four lines, wherein exchange is disconnected
Road device output end passes through three A.C. contactors of phase line L connections one；The AC380V coils of the A.C. contactor then connect any two
Bar phase line L output end, when A.C. contactor is powered and adhesive is turned on, the coil is worked due to the effect of phase voltage, after
And maintain the attracting state of A.C. contactor so that three phase line L constant conductions；Then, on the one hand four lines of output end pass through
Transient protective diode is grounded (SPD PE), is specially that ground wire copper bar is first connected to together with the ground wire of inverter, then through ground
Line copper bar accesses the earth by diode；On the other hand, four lines of conducting are connected to it by inversion AC isolation switch 4001
His electrical equipment.
When abnormal conditions occur, AC circuit breaker work, i.e. triple line L power-off, the AC380V coils of A.C. contactor
Due to power-off A.C. contactor is disconnected, so as to disconnect the electrical connection of A.C. contactor rear and front end, thoroughly cut-out is electric
Air circuit；Also, due to the unilateral conduction of diode, adverse current can be effectively prevented, the reverse breakdown equipment such as lightning current is prevented, from
And protect electrical equipment.
It is described above, only the utility model preferably embodiment, but protection domain of the present utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model is disclosed
Change or replacement, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should
It is defined by scope of the claims.
Claims (3)
1. the counterflow-preventing protection device of photovoltaic system, it is characterised in that：It is included by photovoltaic cable and photovoltaic panel
The connected inverter of output end, the AC circuit breaker being connected by four lines with the inverter output end, by three in four lines
The A.C. contactor that phase line is connected with the AC circuit breaker output end, the output end of the A.C. contactor on the one hand use by connection
Electric equipment, on the other hand the earth terminal with the inverter be grounded by diode.
2. the counterflow-preventing protection device of photovoltaic system as claimed in claim 1, it is characterised in that：The A.C. contactor it is defeated
Go out end and electrical equipment is connected to by inversion AC isolation switch.
3. the counterflow-preventing protection device of photovoltaic system as claimed in claim 1, it is characterised in that：The A.C. contactor
AC380V coils connect the output end of any two phase lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720096040.XU CN206422520U (en) | 2017-01-25 | 2017-01-25 | The counterflow-preventing protection device of photovoltaic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720096040.XU CN206422520U (en) | 2017-01-25 | 2017-01-25 | The counterflow-preventing protection device of photovoltaic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206422520U true CN206422520U (en) | 2017-08-18 |
Family
ID=59569531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720096040.XU Expired - Fee Related CN206422520U (en) | 2017-01-25 | 2017-01-25 | The counterflow-preventing protection device of photovoltaic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206422520U (en) |
-
2017
- 2017-01-25 CN CN201720096040.XU patent/CN206422520U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170818 Termination date: 20220125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |