CN206057422U - A kind of overvoltage and overcurrent protection alarm device - Google Patents
A kind of overvoltage and overcurrent protection alarm device Download PDFInfo
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- CN206057422U CN206057422U CN201621093064.1U CN201621093064U CN206057422U CN 206057422 U CN206057422 U CN 206057422U CN 201621093064 U CN201621093064 U CN 201621093064U CN 206057422 U CN206057422 U CN 206057422U
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- igct
- diode
- relay
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Abstract
The utility model discloses a kind of overvoltage and overcurrent protection alarm device; including transformator T1, inductance transformer T2, commutator group, relay K and IGCT VTH; the commutator group includes bridge rectifier UR and commutation diode D1; bridge rectifier UR is connected to the secondary side of transformator T1; commutation diode D1 is connected to the sensing side of inductance transformer T2; the side time of transformator T1 is connected with the primary side correspondence of inductance transformer T2, and the normally-closed contact K1 of relay K is connected in the loop that load RL is located.This utility model adopts said structure, load can be played a very good protection, while carrying out alarm to overvoltage, overcurrent situations by light emitting diode, speaker, also the Important Components in device can be played a very good protection in addition.
Description
Technical field
This utility model is related to voltage, current protection field, and in particular to a kind of overvoltage and overcurrent protection are reported to the police and filled
Put.
Background technology
In power system, overvoltage refers to the abnormal voltage liter more than running voltage for occurring under given conditions
Height, overvoltage belong to a kind of electromagnetic distu phenomenon in power system, and the insulation of electrical equipment tolerates running voltage for a long time, together
When must also be able to bear the overvoltage of certain amplitude, so just can guarantee that power system security reliably runs.Overcurrent refers to
Be electric current more than rated current, be all overcurrent more than the loop current of the specified load magnitude of current of return conductors, when load electricity
Short out road or beyond rated output power when, that is, show overcurrent phenomenon.
At present, although have a lot, but generally speaking for overvoltage, the protection device of overcurrent and measure, protection dress
The sensitivity put is not high, in the case of overvoltage, overcurrent, is easily caused related device and is burned out, and shortens protection device
Service life.In addition, general protection device more intuitively cannot carry out alarm to overvoltage, overcurrent.
Utility model content
The purpose of this utility model is to provide a kind of overvoltage and overcurrent protection alarm device, is solved current excessively electric
Pressure, overcurrent protection service life are shorter, while alarm cannot be carried out to overvoltage, overcurrent intuitively more
Problem.
This utility model for achieving the above object, employs the following technical solutions realization：
A kind of overvoltage and overcurrent protection alarm device, including transformator T1, inductance transformer T2, commutator group, after
Electrical equipment K and IGCT VTH, institute's commutator group include that bridge rectifier UR and commutation diode D1, bridge rectifier UR connect
The secondary side of transformator T1 is connected on, commutation diode D1 is connected to the sensing side of inductance transformer T2, the side time of transformator T1
It is connected with the primary side correspondence of inductance transformer T2, the normally-closed contact K1 of relay K is connected in the loop that load RL is located；
The outfan of bridge rectifier UR, IGCT VTH are connected to after the anode SRE K of the IGCT VTH
Negative electrode be connected with the sensing side of the secondary side and inductance transformer T2 of transformator T1, the gate pole of IGCT VTH is connected with two
Bar branch road, wherein branch road includes the first potentiometer RP1, first resistor R1 and the first diode D1 being sequentially connected in series,
The anode of one diode D1 is connected with the sensing side of inductance transformer T2, and another branch road includes the second potentiometer being sequentially connected in series
RP2,3rd resistor R3,3rd resistor R3 are connected to the outfan of bridge rectifier UR；
Also include second resistance R2 and the 4th resistance R4, one end of second resistance R2 is connected to the first potentiometer RP1 and the
Between one resistance R1, the other end is connected to the negative electrode of IGCT VTH, and one end of the 4th resistance R4 is connected to the second potentiometer RP2
Between 3rd resistor R3, the other end is connected to the negative electrode of IGCT VTH；
Also include light emitting diode DL, speaker H, the 5th resistance R5 and the 6th resistance R6, light emitting diode DL and the
The two ends of relay K are connected in parallel on after five resistance R5 series connection, speaker H is connected in parallel on the two of relay K after connecting with the 6th resistance R6
End.
Further, as optimal technical scheme, also including first fuse SL1, first fuse SL1 is connected on
In the loop that load RL is located.
Further, as optimal technical scheme, also including second fuse SL2, second fuse SL2 and brilliant lock
Pipe VTH connects.
Further, as optimal technical scheme, also including the second diode D2, the second diode D2 be connected in parallel on after
The two ends of electrical equipment K, and the negative electrode of the second diode D2 is connected to the outfan of bridge rectifier UR.
Further, as optimal technical scheme, also including electric capacity C, one end of the electric capacity C is connected to bridge rectifier
The outfan of UR, other end ground connection.
This utility model compared with prior art, with advantages below and beneficial effect：
（1）This utility model detected to voltage, electric current respectively by transformator, inductance transformer, when occurring
When voltage, overcurrent, turn on thyristors makes relay work and open its normally-closed contact, so that load power down stops work
Make, load is played a very good protection, while being entered to overvoltage, overcurrent situations by light emitting diode, speaker
Row alarm.
（2）This utility model by arranging the second diode, first fuse, second fuse, to corresponding load, after
Electrical equipment, IGCT serve the effect of being effectively protected, it is to avoid related components and parts are damaged because voltage, electric current are excessive, so as to carry
The service life of high protection device so as to the state in normal work for a long time.
Description of the drawings
Fig. 1 is overall structure diagram of the present utility model.
Specific embodiment
This utility model is described in further detail with reference to embodiment, but embodiment of the present utility model is not
It is limited to this.
Embodiment：
As shown in figure 1, a kind of overvoltage and overcurrent protection alarm device described in the present embodiment, including transformator T1,
Inductance transformer T2, commutator group, relay K and IGCT VTH, institute's commutator group include bridge rectifier UR and rectification
Diode D1, bridge rectifier UR are connected to the secondary side of transformator T1, and commutation diode D1 is connected to inductance transformer T2's
Sensing side, the side time of transformator T1 are connected with the primary side correspondence of inductance transformer T2, the normally-closed contact K1 series connection of relay K
In the loop that load RL is located；
The outfan of bridge rectifier UR, brilliant lock are connected to after the anode SRE K of the IGCT VTH of the present embodiment
The negative electrode of pipe VTH is connected with the sensing side of the secondary side and inductance transformer T2 of transformator T1, the gate pole connection of IGCT VTH
There are two branch roads, wherein branch road includes the first potentiometer RP1, first resistor R1 and the first diode being sequentially connected in series
The anode of D1, the first diode D1 is connected with the sensing side of inductance transformer T2, and another branch road includes second for being sequentially connected in series
Potentiometer RP2,3rd resistor R3,3rd resistor R3 are connected to the outfan of bridge rectifier UR；
The present embodiment also includes second resistance R2 and the 4th resistance R4, and one end of second resistance R2 is connected to the first potentiometer
Between RP1 and first resistor R1, the other end is connected to the negative electrode of IGCT VTH, and it is electric that one end of the 4th resistance R4 is connected to second
Between position device RP2 and 3rd resistor R3, the other end is connected to the negative electrode of IGCT VTH；
The present embodiment also includes light emitting diode DL, speaker H, the 5th resistance R5 and the 6th resistance R6, light-emitting diodes
Pipe DL is connected in parallel on the two ends of relay K after connecting with the 5th resistance R5, speaker H is connected in parallel on relay after connecting with the 6th resistance R6
The two ends of device K.
The present embodiment also includes first fuse SL1, and first fuse SL1 is connected in the loop that load RL is located.
The present embodiment also includes second fuse SL2, and second fuse SL2 is connected with IGCT VTH.
The present embodiment also includes that the second diode D2, the second diode D2 are connected in parallel on the two ends of relay K, and the two or two pole
The negative electrode of pipe D2 is connected to the outfan of bridge rectifier UR.
The present embodiment also includes electric capacity C, and one end of the electric capacity C is connected to the outfan of bridge rectifier UR, the other end
Ground connection.
The operation principle of the present embodiment：When voltage is in rated range, IGCT VTH is in cut-off state, relay K
Do not work, its normally-closed contact K1 is in closure state, load live line work；When voltage overrate, the two of transformator T1
Secondary side voltage is increased, Jing after bridge rectifier UR rectifications, then Jing 3rd resistors R3, the 4th resistance R4, the second potentiometer RP2
After make IGCT VTH turn on, relay K-band electricity work, its normally-closed contact K1 disconnect, load do not work；When load circuit occurs
Short circuit or when exceeding rated output power, the sensing side voltage of inductance transformer T2 is raised, rectified diode D1, first electric
Turn on IGCT VTH after resistance R1, second resistance R2, the first potentiometer RP1, the electricity work of relay K-band, its normally-closed contact K1 are broken
Open, load power down does not work.
The above, is only preferred embodiment of the present utility model, and any pro forma limit is not done to this utility model
System, every any simple modification made to above example according to technical spirit of the present utility model, equivalent variations, each falls within
Within protection domain of the present utility model.
Claims (5)
1. a kind of overvoltage and overcurrent protection alarm device, it is characterised in that：Including transformator T1, inductance transformer T2, whole
Stream device group, relay K and IGCT VTH, the commutator group include bridge rectifier UR and commutation diode D1, bridge-type
Commutator UR is connected to the secondary side of transformator T1, and commutation diode D1 is connected to the sensing side of inductance transformer T2, transformator
The side time of T1 is connected with the primary side correspondence of inductance transformer T2, and the normally-closed contact K1 of relay K is connected on load RL and is located
Loop in；
The outfan of bridge rectifier UR, the moon of IGCT VTH are connected to after the anode SRE K of the IGCT VTH
Pole is connected with the sensing side of the secondary side and inductance transformer T2 of transformator T1, and the gate pole of IGCT VTH is connected with two
Road, wherein branch road includes the first potentiometer RP1, first resistor R1 and the first diode D1 being sequentially connected in series, the one or two
The anode of pole pipe D1 is connected with the sensing side of inductance transformer T2, the second potentiometer RP2 that another branch road includes being sequentially connected in series,
3rd resistor R3,3rd resistor R3 are connected to the outfan of bridge rectifier UR；
Also include second resistance R2 and the 4th resistance R4, it is electric with first that one end of second resistance R2 is connected to the first potentiometer RP1
Between resistance R1, the other end is connected to the negative electrode of IGCT VTH, and one end of the 4th resistance R4 is connected to the second potentiometer RP2 and the
Between three resistance R3, the other end is connected to the negative electrode of IGCT VTH；
Also include light emitting diode DL, speaker H, the 5th resistance R5 and the 6th resistance R6, light emitting diode DL is electric with the 5th
The two ends of relay K are connected in parallel on after resistance R5 series connection, speaker H is connected in parallel on the two ends of relay K after connecting with the 6th resistance R6.
2. a kind of overvoltage according to claim 1 and overcurrent protection alarm device, it is characterised in that：Also include first
Fuse SL1, first fuse SL1 are connected in the loop that load RL is located.
3. a kind of overvoltage according to claim 1 and overcurrent protection alarm device, it is characterised in that：Also include second
Fuse SL2, second fuse SL2 are connected with IGCT VTH.
4. a kind of overvoltage according to claim 1 and overcurrent protection alarm device, it is characterised in that：Also include second
Diode D2, the second diode D2 are connected in parallel on the two ends of relay K, and the negative electrode of the second diode D2 to be connected to bridge-type whole
The outfan of stream device UR.
5. a kind of overvoltage according to claim 1 and overcurrent protection alarm device, it is characterised in that：Also include electric capacity
One end of C, the electric capacity C is connected to the outfan of bridge rectifier UR, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621093064.1U CN206057422U (en) | 2016-09-30 | 2016-09-30 | A kind of overvoltage and overcurrent protection alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621093064.1U CN206057422U (en) | 2016-09-30 | 2016-09-30 | A kind of overvoltage and overcurrent protection alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206057422U true CN206057422U (en) | 2017-03-29 |
Family
ID=58366470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621093064.1U Expired - Fee Related CN206057422U (en) | 2016-09-30 | 2016-09-30 | A kind of overvoltage and overcurrent protection alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206057422U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966606A (en) * | 2017-11-23 | 2018-04-27 | 国网四川省电力公司电力科学研究院 | A kind of electric system high-voltage shunt reactor overcurrent false alarm method of discrimination |
-
2016
- 2016-09-30 CN CN201621093064.1U patent/CN206057422U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966606A (en) * | 2017-11-23 | 2018-04-27 | 国网四川省电力公司电力科学研究院 | A kind of electric system high-voltage shunt reactor overcurrent false alarm method of discrimination |
| CN107966606B (en) * | 2017-11-23 | 2019-11-12 | 国网四川省电力公司电力科学研究院 | A kind of electric system high-voltage shunt reactor overcurrent false alarm method of discrimination |
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| 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: 20170329 Termination date: 20180930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |