CN206602075U - Relay1 case leakage-current alarm circuit - Google Patents
Relay1 case leakage-current alarm circuit Download PDFInfo
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- CN206602075U CN206602075U CN201720325769.XU CN201720325769U CN206602075U CN 206602075 U CN206602075 U CN 206602075U CN 201720325769 U CN201720325769 U CN 201720325769U CN 206602075 U CN206602075 U CN 206602075U
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- resistance
- connection
- voltage comparator
- relay1 case
- diode
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Abstract
Relay1 case leakage-current alarm circuit, belongs to relay leakage-current alarm technical field.The problem of the utility model is to solve relay1 case effect of leakage control circuit reliability.It includes hard contact S1, insurance M1, diode L1, light emitting diode L2, voltage comparator Q1, electric capacity C1, electric capacity C2, potentiometer R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6 and resistance R7；Contacted by hard contact S1 with relay1 case, insurance M1 ground connection is connected with the ground of relay；When relay1 case leakproof, M1 normallies are insured；When relay1 case leaks electricity, insurance M1 actions cut off circuit, light emitting diode L2 extinguishes.Operating personnel can judge that relay1 case leaks electricity accordingly, and presentation is directly perceived；The utility model is used for the on-line monitoring that relay1 case leaks electricity.
Description
Technical field
The utility model is related to relay1 case leakage-current alarm circuit, belongs to relay leakage-current alarm technical field.
Background technology
Relay is the device that a kind of electric automatization field is commonly used, and is played in daily control circuit vital
Effect.Relay1 case leaks electricity, and is a kind of situation often occurred in relay failure, and situation about leaking electricity is very unlikely to hair
Feel, such case not only influences to control the reliability of circuit, is also extremely hazardous similarly for operating personnel.
The content of the invention
The utility model purpose be in order to solve relay1 case effect of leakage control circuit reliability the problem of there is provided
A kind of relay1 case leakage-current alarm circuit.
Relay1 case leakage-current alarm circuit described in the utility model, it includes hard contact S1, insurance M1, diode
L1, light emitting diode L2, voltage comparator Q1, electric capacity C1, electric capacity C2, potentiometer R1, resistance R2, resistance R3, resistance R4, resistance
R5, resistance R6 and resistance R7,
Hard contact S1 one end is used to connect relay1 case, the one of hard contact S1 other end connection insurance M1
End, insurance M1 other end ground connection；Hard contact S1 other end connection diode L1 negative pole, diode L1 positive pole connection
Resistance R6 one end, resistance R6 other end connection resistance R2 one end, resistance R2 other end connection potentiometer R1 one end,
Potentiometer R1 other end ground connection, potentiometer R1 sliding end connection resistance R7 one end, the resistance R7 other end connects two poles
Pipe L1 positive pole；
Diode L1 positive pole connection voltage comparator Q1 inverting input, voltage comparator Q1 in-phase input end connects
Connect potentiometer R1 one end, voltage comparator Q1 negative pole feeder ear connection resistance R4 one end, resistance R4 other end connection-
12V power supplys, voltage comparator Q1 negative pole feeder ear connection electric capacity C2 one end, electric capacity C2 other end ground connection；Voltage ratio compared with
Device Q1 positive pole feeder ear connection electric capacity C1 one end, electric capacity C1 other end ground connection；Voltage comparator Q1 positive pole feeder ear
Connect resistance R3 one end, resistance R3 other end connection+12V power supplys；
Resistance R3 other end connection resistance R2 one end and resistance R5 one end, resistance R5 other end connection voltage ratio
Compared with device Q1 output end, resistance R5 other end connecting luminous diode L2 positive pole, light emitting diode L2 negative pole ground connection.
Advantage of the present utility model：The utility model is contacted by hard contact S1 with relay1 case, and insurance M1 is connect
Ground is connected with the ground of relay.When relay1 case leakproof, M1 normallies are insured；When relay1 case leaks electricity,
Insure M1 actions, cut off circuit, light emitting diode L2 extinguishes.Operating personnel can judge that relay1 case leaks electricity accordingly, presentation
Intuitively.The monitoring whether leaked electricity to relay1 case is thus achieved, is conducive in time tieing up relay in the case of failure
Shield, so that it is guaranteed that the reliability of control circuit where relay.
The utility model circuit structure is simple, and dependable performance effectively realizes the monitoring to relay working condition.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of relay1 case leakage-current alarm circuit described in the utility model.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1, relay1 case described in present embodiment leaks electricity
Warning circuit, it includes hard contact S1, insurance M1, diode L1, light emitting diode L2, voltage comparator Q1, electric capacity C1, electricity
Hold C2, potentiometer R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6 and resistance R7,
Hard contact S1 one end is used to connect relay1 case, the one of hard contact S1 other end connection insurance M1
End, insurance M1 other end ground connection；Hard contact S1 other end connection diode L1 negative pole, diode L1 positive pole connection
Resistance R6 one end, resistance R6 other end connection resistance R2 one end, resistance R2 other end connection potentiometer R1 one end,
Potentiometer R1 other end ground connection, potentiometer R1 sliding end connection resistance R7 one end, the resistance R7 other end connects two poles
Pipe L1 positive pole；
Diode L1 positive pole connection voltage comparator Q1 inverting input, voltage comparator Q1 in-phase input end connects
Connect potentiometer R1 one end, voltage comparator Q1 negative pole feeder ear connection resistance R4 one end, resistance R4 other end connection-
12V power supplys, voltage comparator Q1 negative pole feeder ear connection electric capacity C2 one end, electric capacity C2 other end ground connection；Voltage ratio compared with
Device Q1 positive pole feeder ear connection electric capacity C1 one end, electric capacity C1 other end ground connection；Voltage comparator Q1 positive pole feeder ear
Connect resistance R3 one end, resistance R3 other end connection+12V power supplys；
Resistance R3 other end connection resistance R2 one end and resistance R5 one end, resistance R5 other end connection voltage ratio
Compared with device Q1 output end, resistance R5 other end connecting luminous diode L2 positive pole, light emitting diode L2 negative pole ground connection.
Resistance R6 and resistance R7 resistance are equal.
Operation principle：Voltage comparator Q1 two feeder ears pass through+and -12V power supplys power, it is ensured that and voltage comparator is stable
Work.Resistance R3, resistance R4 are current-limiting resistance, and electric capacity C1, electric capacity C2 is filter capacitor, can protect voltage comparator work electricity
The stabilization of pressure.R5 is pull-up resistor, it is ensured that voltage comparator output end can export forward voltage.
In use, hard contact S1 is connected with relay1 case, it is ensured that conducting, the ground phase on M1 ground and relay is insured
Connection.When relay1 case leakproof, M1 normallies are insured, then diode L1 negative electrode is connected to the ground by insuring M1
Connect ,+12V power supplys pass through resistance R6 and diode L1 partial pressures.Because diode L1 is in the conduction state, then voltage comparator is anti-
To the tube voltage drop that input terminal voltage is diode L1.The tube voltage drop of general diode is not over 1V.Now voltage comparator
In-phase end input voltage is the voltage after resistance R2 and potentiometer R1 partial pressures.By adjusting R1 resistance, electricity can be adjusted
Press in the voltage of comparator in-phase input end, this circuit and the voltage of voltage comparator Q1 in-phase input end is adjusted to+5V, be
The reference voltage of this circuit.When relay1 case leakproof, the homophase input terminal voltage of voltage comparator is more than anti-phase input
Terminal voltage, voltage comparator output end exports positive voltage, light emitting diode L2 Chang Liang by pull-up resistor R5.
When relay1 case leaks electricity, insurance M1 actions cut off circuit, then resistance R7 accesses circuit.Voltage comparator Q1
Inverting input input voltage be voltage Jing Guo R6 and R7 partial pressures.This circuit makes resistance R6 and resistance R7 resistance equal,
R6=R7, then anti-phase input terminal voltage is+6V.Now the voltage of in-phase input end is+5V, less than reverse input end voltage.Then
Voltage comparator Q1 output ends export low level.Now light emitting diode L2 extinguishes.Operating personnel can be according to light emitting diode
Light on and off state intuitively judge relay1 case leak electricity.Light emitting diode L2 can select green light, when green light extinguishes, carry
Show leak current fault, it is dangerous.
Claims (2)
1. a kind of relay1 case leakage-current alarm circuit, it is characterised in that it include hard contact S1, insurance M1, diode L1,
Light emitting diode L2, voltage comparator Q1, electric capacity C1, electric capacity C2, potentiometer R1, resistance R2, resistance R3, resistance R4, resistance R5,
Resistance R6 and resistance R7,
Hard contact S1 one end is used to connect relay1 case, and hard contact S1 other end connection insurance M1 one end is protected
Dangerous M1 other end ground connection；Hard contact S1 other end connection diode L1 negative pole, diode L1 positive pole connection resistance
R6 one end, resistance R6 other end connection resistance R2 one end, resistance R2 other end connection potentiometer R1 one end, current potential
Device R1 other end ground connection, potentiometer R1 sliding end connection resistance R7 one end, resistance R7 other end connection diode L1
Positive pole；
Diode L1 positive pole connection voltage comparator Q1 inverting input, voltage comparator Q1 in-phase input end connection electricity
Position device R1 one end, voltage comparator Q1 negative pole feeder ear connection resistance R4 one end, resistance R4 other end connection -12V
Power supply, voltage comparator Q1 negative pole feeder ear connection electric capacity C2 one end, electric capacity C2 other end ground connection；Voltage comparator Q1
Positive pole feeder ear connection electric capacity C1 one end, electric capacity C1 other end ground connection；Voltage comparator Q1 positive pole feeder ear connection
Resistance R3 one end, resistance R3 other end connection+12V power supplys；
Resistance R3 other end connection resistance R2 one end and resistance R5 one end, resistance R5 other end connection voltage comparator
Q1 output end, resistance R5 other end connecting luminous diode L2 positive pole, light emitting diode L2 negative pole ground connection.
2. relay1 case leakage-current alarm circuit according to claim 1, it is characterised in that resistance R6 and resistance R7 resistance
Value is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720325769.XU CN206602075U (en) | 2017-03-30 | 2017-03-30 | Relay1 case leakage-current alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720325769.XU CN206602075U (en) | 2017-03-30 | 2017-03-30 | Relay1 case leakage-current alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206602075U true CN206602075U (en) | 2017-10-31 |
Family
ID=60144867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720325769.XU Expired - Fee Related CN206602075U (en) | 2017-03-30 | 2017-03-30 | Relay1 case leakage-current alarm circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206602075U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108790882A (en) * | 2018-06-12 | 2018-11-13 | 方碧水 | A kind of new-energy automobile quick charge device |
-
2017
- 2017-03-30 CN CN201720325769.XU patent/CN206602075U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108790882A (en) * | 2018-06-12 | 2018-11-13 | 方碧水 | A kind of new-energy automobile quick charge device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171031 Termination date: 20180330 |