CN207339012U - A kind of switchgear overtemperature protection system - Google Patents
A kind of switchgear overtemperature protection system Download PDFInfo
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- CN207339012U CN207339012U CN201721087397.8U CN201721087397U CN207339012U CN 207339012 U CN207339012 U CN 207339012U CN 201721087397 U CN201721087397 U CN 201721087397U CN 207339012 U CN207339012 U CN 207339012U
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- transistor
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- light emitting
- emitting diode
- storage battery
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Abstract
The utility model discloses a kind of switchgear overtemperature protection system; including storage battery G1, the first light emitting diode D1, the second light emitting diode D2, relay K1, transistor T1, transistor T2 and three thermistors RT1, RT2, RT3; three thermistors RT1, RT2, RT3 are arranged on switchgear top, bottom and middle part; and it is in series successively; in switchgear under normal circumstances; thermistor is in normal temperature state; transistor T1 ends; transistor T2 is turned on; relay K1 obtains electric normally-closed contact and disconnects; wind turbine does not work, energy saving；When the hot-spot of switchgear, when any thermistor is heated above preset temperature, transistor T1 conductings, transistor T2 cut-offs, second light emitting diode lights alarm, relay K1 dead electricity normally-closed contact closes, and blower fan work, achievees the purpose that heat dissipation, circuit is simple, it is of low cost, easy to be widely popularized, have a good application prospect.
Description
Technical field
It the utility model is related to protection field of circuit technology, and in particular to a kind of switchgear overtemperature protection system.
Background technology
Switchgear, for placing various protective relaying devices or other electrical equipments, under all kinds of electric equipment operations,
Substantial amounts of heat can be produced.When environment temperature is excessive in switchgear, protective relaying device crash is easy to cause, or even shorten it
Service life.
Utility model content
The purpose of the utility model is to overcome existing when environment temperature is excessive in switchgear, relay protection is easy to cause
Device crashes, or even the problem of shorten its service life.
In order to achieve the above object, technical solution is used by the utility model：
A kind of switchgear overtemperature protection system, it is characterised in that：Including storage battery G1, the first light emitting diode D1, second
Light emitting diode D2, relay K1, transistor T1, transistor T2 and three thermistors RT1, RT2, RT3, three temperature-sensitives
Resistance RT1, RT2, RT3 are arranged on switchgear top, bottom and middle part, described three thermistors RT1, RT2, RT3 phase successively
Series connection, one end with slide rheostat RP1, the base stage of transistor T1 are connected respectively for one end of thermistor RT1, thermistor
One end of RT3 is connected to the ground, and the other end of the slide rheostat RP1 is connected with the cathode of storage battery G1, the electric power storage
The cathode of pond G1 is also connected by resistance R1 with the cathode of the first light emitting diode D1, and the first light emitting diode D1's is negative
Pole is connected to the ground, and the emitter of the transistor T1 is connected to the ground by resistance R2, the collector point of the transistor T1
One end, the anode of the second light emitting diode D2 not with resistance R3 are connected, and the cathode of the second light emitting diode D2 passes through
Resistance R4 is connected with the cathode of storage battery G1, and the other end of the resistance R3 is connected with the base stage of transistor T2, the crystalline substance
The base stage of body pipe T2 is also connected to the ground by resistance R5, and the emitter of the transistor T2 is connected with the emitter of transistor T1
Connect, the collector of the transistor T2 is connected by the coil of relay K1 with the cathode of storage battery G1, the relay K1
Coil both ends be also parallel with diode D3, the cathode of the diode D3 is connected with the collector of transistor T2, described two
The anode of pole pipe D3 is connected with the cathode of storage battery G1, and the anode of the storage battery G1 is connected to the ground, the relay K1
Normally-closed contact be connected in the supply line of cooling fan.
A kind of foregoing switchgear overtemperature protection system, it is characterised in that：The first light emitting diode D1 sends out for green
Optical diode, the second light emitting diode D2 are red light emitting diodes.
A kind of foregoing switchgear overtemperature protection system, it is characterised in that：The cathode of the storage battery G1 is in series with switch
S1。
A kind of foregoing switchgear overtemperature protection system, it is characterised in that：Between the positive and negative electrode of the storage battery G1 also simultaneously
Join for filter capacitor C1.
A kind of foregoing switchgear overtemperature protection system, it is characterised in that：Electricity between the positive and negative electrode of the storage battery G1
Press as 9V.
A kind of foregoing switchgear overtemperature protection system, it is characterised in that：Described three thermistors RT1, RT2, RT3 are equal
For PCT thermistors.
A kind of foregoing switchgear overtemperature protection system, it is characterised in that：The transistor T1, transistor T2 are NPN
Transistor npn npn.
The beneficial effects of the utility model are：The switchgear overtemperature protection system of the utility model, three thermistors
RT1, RT2, RT3 are arranged on switchgear top, bottom and middle part, and are in series successively, in switchgear under normal circumstances, temperature-sensitive electricity
Resistance is in normal temperature state, transistor T1 cut-offs, and transistor T2 is turned on, and relay K1 obtains electric normally-closed contact and disconnects, and wind turbine does not work,
Energy saving；When the hot-spot of switchgear, when any thermistor is heated above preset temperature, transistor T1 conductings,
Transistor T2 ends, and the second light emitting diode lights alarm, and relay K1 dead electricity normally-closed contact closure, blower fan work, reaches scattered
The purpose of heat, circuit is simple, of low cost, easy to be widely popularized, has a good application prospect.
Brief description of the drawings
Fig. 1 is the circuit diagram of the switchgear overtemperature protection system of the utility model.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
As shown in Figure 1, the switchgear overtemperature protection system of the utility model, including storage battery G1, the first light emitting diode
D1, the second light emitting diode D2, relay K1, transistor T1, transistor T2 and three thermistor RT1, RT2, RT3, it is described
Three thermistors RT1, RT2, RT3 are arranged on switchgear top, bottom and middle part, three thermistor RT1, RT2,
RT3 is in series successively, and one end with slide rheostat RP1, the base stage of transistor T1 are connected respectively for one end of thermistor RT1
Connect, one end of thermistor RT3 is connected to the ground, and the other end of the slide rheostat RP1 is connected with the cathode of storage battery G1
Connect, the cathode of the storage battery G1 is also connected by resistance R1 with the cathode of the first light emitting diode D1, and described first shines
The anode of diode D1 is connected to the ground, and the emitter of the transistor T1 is connected to the ground by resistance R2, the transistor
One end with resistance R3, the anode of the second light emitting diode D2 are connected the collector of T1 respectively, second light emitting diode
The cathode of D2 is connected by resistance R4 with the cathode of storage battery G1, the other end of the resistance R3 and the base stage phase of transistor T2
Connection, the base stage of the transistor T2 are also connected to the ground by resistance R5, emitter and the transistor T1 of the transistor T2
Emitter be connected, the collector of the transistor T2 is connected by the coil of relay K1 with the cathode of storage battery G1,
The coil both ends of the relay K1 are also parallel with diode D3, the cathode of the diode D3 and the collector phase of transistor T2
Connection, the anode of the diode D3 are connected with the cathode of storage battery G1, and the anode of the storage battery G1 is connected to the ground, institute
The normally-closed contact for stating relay K1 is connected in the supply line of cooling fan.
Preferably, the first light emitting diode D1 is green LED, and the second light emitting diode D2 is red
Color light emitting diode, when motor works normally, the green light of the first light emitting diode D1 lights；During the excessive failure of motor temperature,
The feux rouges of two light emitting diode D2 lights.
Preferably, the cathode of the storage battery G1 is in series with switch S1, ensures normally closed or the disconnection of power voltage supply.
Preferably, also parallel connection is filter capacitor C1 between the positive and negative electrode of the storage battery G1, there is provided the stability of voltage,
Filter out clutter, the voltage between the positive and negative electrode of storage battery G1 is 9V, and whole circuit power consumption is low.
Preferably, described three thermistors RT1, RT2, RT3 are PCT thermistors, and stability is high, and temperature drift is small, inspection
It is high to survey precision.
The transistor T1, transistor T2 are NPN transistor.
In conclusion the switchgear overtemperature protection system of the utility model, three thermistors RT1, RT2, RT3 are arranged on
Switchgear top, bottom and middle part, and be in series successively, thermistor is in normal temperature state in switchgear under normal circumstances, brilliant
Body pipe T1 ends, and transistor T2 conductings, relay K1 obtains electric normally-closed contact and disconnects, and wind turbine does not work, energy saving；Work as switchgear
Hot-spot when, when any thermistor is heated above preset temperature, transistor T1 conducting, transistor T2 cut-off, second
Light emitting diode lights alarm, and relay K1 dead electricity normally-closed contact closure, blower fan work, achievees the purpose that heat dissipation, and circuit is simple,
It is of low cost, easy to be widely popularized, have a good application prospect.
The basic principle, main features and advantages of the utility model have been shown and described above.The technical staff of the industry
It should be appreciated that the present utility model is not limited to the above embodiments, the above embodiments and description only describe this
The principle of utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model also has various change
And improvement, these various changes and improvements fall within the scope of the claimed invention.The utility model requires protection scope
It is defined by the appending claims and its equivalent thereof.
Claims (7)
- A kind of 1. switchgear overtemperature protection system, it is characterised in that：Including storage battery G1, the first light emitting diode D1, the second hair Optical diode D2, relay K1, transistor T1, transistor T2 and three thermistors RT1, RT2, RT3, three temperature-sensitive electricity Resistance RT1, RT2, RT3 are arranged on switchgear top, bottom and middle part, and described three thermistors RT1, RT2, RT3 mutually go here and there successively Connection, one end with slide rheostat RP1, the base stage of transistor T1 are connected respectively for one end of thermistor RT1, thermistor One end of RT3 is connected to the ground, and the other end of the slide rheostat RP1 is connected with the cathode of storage battery G1, the electric power storage The cathode of pond G1 is also connected by resistance R1 with the cathode of the first light emitting diode D1, and the first light emitting diode D1's is negative Pole is connected to the ground, and the emitter of the transistor T1 is connected to the ground by resistance R2, the collector point of the transistor T1 One end, the anode of the second light emitting diode D2 not with resistance R3 are connected, and the cathode of the second light emitting diode D2 passes through Resistance R4 is connected with the cathode of storage battery G1, and the other end of the resistance R3 is connected with the base stage of transistor T2, the crystalline substance The base stage of body pipe T2 is also connected to the ground by resistance R5, and the emitter of the transistor T2 is connected with the emitter of transistor T1 Connect, the collector of the transistor T2 is connected by the coil of relay K1 with the cathode of storage battery G1, the relay K1 Coil both ends be also parallel with diode D3, the cathode of the diode D3 is connected with the collector of transistor T2, described two The anode of pole pipe D3 is connected with the cathode of storage battery G1, and the anode of the storage battery G1 is connected to the ground, the relay K1 Normally-closed contact be connected in the supply line of cooling fan.
- A kind of 2. switchgear overtemperature protection system according to claim 1, it is characterised in that：First light emitting diode D1 is green LED, and the second light emitting diode D2 is red light emitting diodes.
- A kind of 3. switchgear overtemperature protection system according to claim 1, it is characterised in that：The cathode of the storage battery G1 It is in series with switch S1.
- A kind of 4. switchgear overtemperature protection system according to claim 1, it is characterised in that：The storage battery G1 just, Also parallel connection is filter capacitor C1 between anode.
- A kind of 5. switchgear overtemperature protection system according to claim 4, it is characterised in that：The storage battery G1 just, Voltage between anode is 9V.
- A kind of 6. switchgear overtemperature protection system according to claim 1, it is characterised in that：Three thermistors RT1, RT2, RT3 are PCT thermistors.
- A kind of 7. switchgear overtemperature protection system according to claim 1, it is characterised in that：The transistor T1, crystal Pipe T2 is NPN transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721087397.8U CN207339012U (en) | 2017-08-29 | 2017-08-29 | A kind of switchgear overtemperature protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721087397.8U CN207339012U (en) | 2017-08-29 | 2017-08-29 | A kind of switchgear overtemperature protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207339012U true CN207339012U (en) | 2018-05-08 |
Family
ID=62370683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721087397.8U Active CN207339012U (en) | 2017-08-29 | 2017-08-29 | A kind of switchgear overtemperature protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207339012U (en) |
-
2017
- 2017-08-29 CN CN201721087397.8U patent/CN207339012U/en active Active
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