CN209358231U - A kind of Surge Protector - Google Patents
A kind of Surge Protector Download PDFInfo
- Publication number
- CN209358231U CN209358231U CN201822266831.XU CN201822266831U CN209358231U CN 209358231 U CN209358231 U CN 209358231U CN 201822266831 U CN201822266831 U CN 201822266831U CN 209358231 U CN209358231 U CN 209358231U
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- China
- Prior art keywords
- varistor
- fuse
- relay
- manual switch
- normally open
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Abstract
The utility model discloses a kind of Surge Protectors, one end of first varistor is connected with the firewire of alternating current, the other end of first varistor is connected with the zero curve of alternating current, second varistor is in parallel with the first varistor, one end of first varistor is connected with one end of the first fuse, the other end of first fuse is connected with one end of relay normally open terminal, the other end of relay normally open terminal is connected with one end of choke coil, the other end connection of choke coil is connected with one end of the second fuse, the other end of second fuse is connected with one end of relay coil, the other end of relay coil is connected with zero curve, relay normally open terminal is in parallel with manual switch, load one end is connected with the other end of choke coil, the other end of load is connected with zero curve；Advantage be the relay normally open terminal of setting it is in parallel with manual switch formed it is self-locking, it is ensured that can power off connect major loop again after there is the first blown fuse when generation surge, shield to load.
Description
Technical field
The utility model relates to technical field of electronic equipment more particularly to a kind of Surge Protectors.
Background technique
Surge Protector is known as lightning protection device again, be a kind of is that electronic equipment, instrument and meter, communication line etc. provide safety
The electronic device of protection.Surge Protector is to be mainly reflected in once surge phenomenon occurs, most cases are next time with damaging device
Surge Protector is caused to be damaged, it is therefore desirable to running check, to prevent the surge again after Surge Protector damage to electricity consumption
The impact of equipment, electronic device.Simultaneously Surge Protector return collocation fuse use, prevent surge current excessive, play to
The protective effect of electric equipment.In actual use, fuse, which can exist, cannot fuse in time or to connect after fusing again
Phenomenon, one there is surge and will cause the damage that can not be retrieved to electrical equipment under such case.
Summary of the invention
The technical problem to be solved by the utility model is to provide it is a kind of there is surge when can ensure that electrical equipment circuit is disconnected
It opens, Surge Protector simple and practical in structure.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of Surge Protector, including first
Varistor, the second varistor, manual switch, relay, choke coil, the first fuse and the second fuse, described
One end of one varistor is connected with the firewire of alternating current, and the other end of the first varistor is connected with the zero curve of alternating current,
Second varistor is in parallel with first varistor, one end of first varistor and described
One end of first fuse is connected, one end phase of the other end of first fuse and the relay normally open terminal
Even, the other end of the relay normally open terminal is connected with one end of the choke coil, the other end of the choke coil
Connection is connected with one end of second fuse, the other end of second fuse and the relay coil
One end is connected, and the other end of the relay coil is connected with zero curve, the relay normally open terminal with it is described manual
Switch is in parallel, and described load one end is connected with the other end of the choke coil, the other end and zero curve of the load
It is connected.
Preferably, first varistor and the second varistor are made of zinc oxide material.
Preferably, the relay is ac solid relay, and when relay work, normally open end is closed.
Preferably, the manual switch is push switch, connects after manual switch is pressed, breaks after manual switch rebound
It opens.
Preferably, first varistor, second varistor, the manual switch, it is described after
Electric appliance, the choke coil, first fuse and second fuse are fixedly mounted in shell.
Preferably, the shell has plastic material composition.
Compared with prior art, this practical advantage is that the relay normally open terminal being arranged is in parallel with manual switch and is formed
It is self-locking, it is ensured that occur to power off connecting major loop again after there is the first blown fuse when surge, play to load
Protective effect；It is in series with the second fuse on relay coil simultaneously, relay can be carried out to protect and can connect in major loop
When surge current is limited, if actual current is more than that the second fuse of blowout current will fuse, while relay normally open
Terminal disconnects, so that major loop disconnects, plays the role of further protecting load.Since relay uses solid-state relay, Gu
State relay small volume reaction more it is sensitive make Surge Protector volume reduce and it is relatively reliable.
Detailed description of the invention
Fig. 1 is the schematic view of the mounting position of the utility model；
Fig. 2 is the circuit connection diagram of the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
As shown in the picture, a kind of Surge Protector, including the first varistor F1, the second varistor F2, manual switch
SW, relay, choke coil L3, the first fuse L1 and the second fuse L2, one end and city of the first varistor F1
The firewire of electricity is connected, and the other end of the first varistor F1 is connected with the zero curve of alternating current, second varistor
F2 is in parallel with the first varistor phase F1, one end of the first varistor F1 and the first fuse L1
One end be connected, the other end of the first fuse L1 is connected with one end of the relay normally open terminal K, described
The other end of relay normally open terminal K is connected with one end of the choke coil L3, the other end connection of the choke coil L3
It is connected with one end of the second fuse L2, the other end of the second fuse L2 and the relay coil KA
One end be connected, the other end of the relay coil KA is connected with zero curve, the relay normally open terminal K with it is described
Manual switch SW is in parallel, and described load one end is connected with the other end of the choke coil L3, the load it is another
End is connected with zero curve.
The first varistor F1 and the second varistor F2 is made of zinc oxide material.
The relay is ac solid relay, and when relay work, normally open end is closed.
The manual switch SW is push switch, connects after manual switch SW is pressed, disconnects after manual switch rebound.
As shown in Fig. 2, the first varistor F1, the second varistor F2, the manual switch
The fixed peace of SW, the relay, the choke coil L3, the first fuse L1 and the second fuse L2
It is constituted in shell 1 mounted in by plastic material.
The course of work of the utility model: power supply connect after, press manual switch SW make with power supply, the first fuse L1,
The major loop conducting formed between choke coil L3 and load, while relay coil KA is powered so that relay normally open terminal K is closed
Close self-locking, major loop still conducting after manual switch SW unclamps；Increased when surge occurs by the voltage at major loop both ends,
The instantaneous variation that choke coil L3 can inhibit electric current at this time prevents current break, when the actual current for actually passing through the first fuse L1
The first fuse L1 can be made to fuse when blowout current more than the first fuse L1, relay coil KA is powered off at this time, relay
The normally opened terminal K of device replys off-state, major loop power-off, even if the first fuse L1 still breaks because failure continues conducting major loop
It opens, to have the function that protection load；When the actual current by the second fuse L2 is more than the fusing of the second fuse L2
Electric current can make the second fuse L2 fuse, and relay coil KA is powered off so that relay normally open terminal K restores to disconnect shape at this time
State, major loop power-off, even if the second fuse L2 is still disconnected because failure continues conducting major loop, to reach protection load
Effect.
When being attached on the first varistor F1 and the second varistor F2 because of the voltage that surge occurs, the first pressure can be made
The resistance value of quick resistance F1 and the second varistor F2 substantially reduce, so that surge current directly passes through the first varistor F1
Zero curve is flowed back into the second varistor F2, thus the electrical member after protection the first varistor F1 and the second varistor F2
Part.
Therefore surge phenomenon once occurs in summary, because the voltage that surge generates presses the first varistor F1 and second
The resistance value of quick resistance F2 reduces, and passes through high current from the first varistor F1 and the second varistor F2；When because of surge electricity
Pressure is so that main circuit current can effectively be ensured to lead back when rising by the presence of the first fuse L1, the second fuse L2 and relay
Road disconnects, to play the role of protection load.
Claims (6)
1. a kind of Surge Protector, it is characterised in that including the first varistor, the second varistor, manual switch, relay,
Choke coil, the first fuse and the second fuse, described one end of the first varistor is connected with the firewire of alternating current, described
The other end of first varistor is connected with the zero curve of alternating current, second varistor and the first varistor phase
Parallel connection, one end of first varistor are connected with one end of first fuse, first fuse
The other end is connected with one end of the relay normally open terminal, and the other end and described of the relay normally open terminal are gripped
One end of stream circle is connected, and the other end connection of the choke coil is connected with one end of second fuse, and described the
The other end of two fuses is connected with one end of the relay coil, the other end and the zero curve phase of the relay coil
Even, the relay normally open terminal is in parallel with the manual switch, the other end of the choke coil and the one of load
End is connected, and the other end of the load is connected with zero curve.
2. a kind of Surge Protector as described in claim 1, which is characterized in that first varistor and second pressure-sensitive
Resistance is made of zinc oxide material.
3. a kind of Surge Protector as described in claim 1, which is characterized in that the relay is alternating current solid-state relay
Device, when relay work, normally open end is closed.
4. a kind of Surge Protector as described in claim 1, which is characterized in that the manual switch is push switch, when
Manual switch is connected after pressing, is disconnected after manual switch rebound.
5. a kind of Surge Protector as described in claim 1, which is characterized in that first varistor, described the
Two varistors, the manual switch, the relay, the choke coil, first fuse and described
Second fuse is fixedly mounted in shell.
6. a kind of Surge Protector as claimed in claim 5, which is characterized in that the shell is made of plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822266831.XU CN209358231U (en) | 2018-12-29 | 2018-12-29 | A kind of Surge Protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822266831.XU CN209358231U (en) | 2018-12-29 | 2018-12-29 | A kind of Surge Protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209358231U true CN209358231U (en) | 2019-09-06 |
Family
ID=67802253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822266831.XU Active CN209358231U (en) | 2018-12-29 | 2018-12-29 | A kind of Surge Protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209358231U (en) |
-
2018
- 2018-12-29 CN CN201822266831.XU patent/CN209358231U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |