CN202363868U - Intelligent low-voltage circuit breaker selective in grounding protection and electricity leakage protection functions - Google Patents
Intelligent low-voltage circuit breaker selective in grounding protection and electricity leakage protection functions Download PDFInfo
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- CN202363868U CN202363868U CN2011204722329U CN201120472232U CN202363868U CN 202363868 U CN202363868 U CN 202363868U CN 2011204722329 U CN2011204722329 U CN 2011204722329U CN 201120472232 U CN201120472232 U CN 201120472232U CN 202363868 U CN202363868 U CN 202363868U
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Abstract
The utility model relates to an intelligent low-voltage circuit breaker selective in grounding protection and electricity leakage protection functions. Signals acquired by an electricity leakage mutual inductor are connected with a normally-closed node of a relay K1 via resistors R5, R6, R7 and R8, and then are connected with an integrated operational amplifier for vector addition computation prior to being inputted to a single chip microcomputer which is used for processing to realize the grounding protection function. When a user selects electricity leakage protection, an I/O (input/output) port of the single chip microcomputer outputs high level, a relay coil to be energized after optical coupling connection, and a normally-open node is changed to the normally-closed node. The intelligent low-voltage circuit breaker selective in the grounding protection and electricity leakage protection functions has the advantages that the I/O port of the single chip microcomputer is used for controlling relay node change to select grounding protection signals and electricity leakage protection signals to be inputted to the single chip microcomputer, and the intelligent low-voltage circuit breaker is guaranteed to have the grounding protection and electricity leakage protection functions simultaneously so that demands of the user are completely met.
Description
Technical field
The utility model belongs to a kind of low-voltage intelligent circuit breaker, particularly relates to the selectable low-voltage intelligent circuit breaker of a kind of ground protection and creepage protection function.
Background technology
The low-voltage intelligent circuit breaker mainly has overcurrent protection and residual current protecting at present.The main finger of residual current protecting ground protection and earth leakage protective, but since ground protection and earth leakage protective signal acquisition method by difference, so can not exist simultaneously on traditional ground protection and the creepage protection function low-voltage intelligent circuit breaker.
Summary of the invention
The utility model can have ground protection and the selectable low-voltage intelligent circuit breaker of creepage protection function simultaneously for the technical problem that exists in the solution known technology provides a kind of.
The utility model for the technical scheme that solves the technical problem that exists in the known technology and take is: it includes single-chip microcomputer, electric leakage instrument transformer, also include first integrated operational amplifier (1U6A), second integrated operational amplifier (1U7A), optocoupler (U1), relay (K1), first, second, third and fourth, five, six, seven, eight, nine, ten resistance (R1, R2, R3, R4, R5, R6, R7, R8, R9, R10) and electric capacity (C); Connect an end of described first resistance (R1) by the signal IGS of described electric leakage instrument transformer collection; One end of the described electric capacity of another termination (C) of described first resistance (R1) and the positive input of described first integrated operational amplifier (1U6A); The other end of described electric capacity (C) is with an end ground connection of described second resistance (R2); The positive input of said first integrated operational amplifier of another termination of described second resistance (R2) (1U6A), the negative input of said first integrated operational amplifier (1U6A) is connected with output; One end of said first integrated operational amplifier (1U6A) output said the 4th resistance of termination (R4), the normal battle of the said relay of another termination (K1) of said the 4th resistance (R4); One end of described the 3rd resistance of I/O signal termination (R3) of described single-chip microcomputer; The anode of the described optocoupler of another termination (U1) positive input of said the 3rd resistance (R3); One end of the coil of said optocoupler (U1) forward output relay termination (K1); The other end ground connection of the coil of described relay (K1), the negative sense input of described optocoupler (U1), output head grounding; One end of described the 5th, six, seven, eight resistance of IA, IB, IC, IG signal termination (R5, R6, R7, R8) that described instrument transformer is gathered; The other end of said the 5th, six, seven, eight resistance (R5, R6, R7, R8) connects the normally closed point of said relay (K1); The negative input of described second integrated operational amplifier of the public termination of said relay (K1) (1U7A); Described the 9th resistance (R9) is serially connected between the negative input and output of said second integrated operational amplifier (1U7A), and the two ends of described the tenth resistance (R10) connect said second integrated operational amplifier (1U7A) positive input and earth potential respectively.
Advantage and the good effect that the utlity model has are: be to change through single-chip processor i/o mouth control relay node to select to control the ground protection signal and the earth leakage protective signal inputs to single-chip microcomputer.This utility model has guaranteed that the low-voltage intelligent circuit breaker can have ground protection, creepage protection function simultaneously.Fully satisfied user's demand.
Description of drawings
Fig. 1 is the key wiring diagram of the utility model.
Embodiment
For further understanding summary of the invention, characteristics and the effect of the utility model, the following examples of giving an example now, and conjunction with figs. specifies as follows:
As shown in Figure 1; The end of the signal end IGS connecting resistance R1 that the electric leakage instrument transformer is gathered; One end of another termination capacitor C of resistance R 1 and the positive input of integrated operational amplifier 1U6A; The other end of capacitor C is with resistance R) an end ground connection, the positive input of resistance R 2 another termination integrated operational amplifier 1U6A, the negative input of integrated operational amplifier 1U6A is connected with output; The end of integrated operational amplifier 1U6A output connecting resistance R4, the normal battle of another relay termination K1 of resistance R 4; The end of the I/O signal end connecting resistance R3 of single-chip microcomputer, the anode of another termination optocoupler U1 positive input of resistance R 3, an end of the coil of optocoupler U1 forward output relay termination K1, the other end ground connection of the coil of relay K 1; The negative sense input of optocoupler U1, output head grounding; The end of the signal IA that instrument transformer is gathered, IB, IC, IG connecting resistance R5, R6, R7, R8; The other end of resistance R 5, R6, R7, R8 connects the normally closed point of relay K 1; The negative input of the public termination integrated operational amplifier 1U7A of relay K 1; Resistance R 9 is serially connected between the negative input and output of integrated operational amplifier 1U7A, and the two ends of resistance R 10 connect integrated operational amplifier 1U7A positive input and earth potential respectively.
The utility model operation principle specifically is to succeed the normally closed node of electrical equipment K1 by the signal IA of electric leakage instrument transformer collection, IB, IC, IN through resistance R 5, R6, R7, R8 to meet integrated operational amplifier 1U7A then and do vector and computing; Handle back signal input single-chip microcomputer, single-chip microcomputer processes operation result and is grounded defencive function.
When the user selects earth leakage protective, then be by the I/O mouth of single-chip microcomputer output high level, relay K1 coil gets electricly after the optocoupler U1 conducting, often opens node and becomes normally closed node.Electric leakage instrument transformer IG signal then inserts integrated operational amplifier 1U7A and handles, and integrated operational amplifier 1U7A output is imported single-chip microcomputer with processing signals, and single-chip microcomputer carries out calculation process to it, realizes creepage protection function.
Claims (1)
1. ground protection and the selectable low-voltage intelligent circuit breaker of creepage protection function; It includes single-chip microcomputer, electric leakage instrument transformer, it is characterized in that: also include first integrated operational amplifier (1U6A), second integrated operational amplifier (1U7A), optocoupler (U1), relay (K1), first, second, third and fourth, five, six, seven, eight, nine, ten resistance (R1, R2, R3, R4, R5, R6, R7, R8, R9, R10) and electric capacity (C); Connect an end of described first resistance (R1) by the signal IGS of described electric leakage instrument transformer collection; One end of the described electric capacity of another termination (C) of described first resistance (R1) and the positive input of described first integrated operational amplifier (1U6A); The other end of described electric capacity (C) is with an end ground connection of described second resistance (R2); The positive input of said first integrated operational amplifier of another termination of described second resistance (R2) (1U6A), the negative input of said first integrated operational amplifier (1U6A) is connected with output; One end of said first integrated operational amplifier (1U6A) output said the 4th resistance of termination (R4), the normal battle of the said relay of another termination (K1) of said the 4th resistance (R4); One end of described the 3rd resistance of I/O signal termination (R3) of described single-chip microcomputer; The anode of the described optocoupler of another termination (U1) positive input of said the 3rd resistance (R3); One end of the coil of said optocoupler (U1) forward output relay termination (K1), the other end ground connection of the coil of described relay (K1); One end of described the 5th, six, seven, eight resistance of IA, IB, IC, IG signal termination (R5, R6, R7, R8) that described instrument transformer is gathered; The other end of said the 5th, six, seven, eight resistance (R5, R6, R7, R8) connects the normally closed point of said relay (K1); The negative input of described second integrated operational amplifier of the public termination of said relay (K1) (1U7A); Described the 9th resistance (R9) is serially connected between the negative input and output of said second integrated operational amplifier (1U7A), and the two ends of described the tenth resistance (R10) connect said second integrated operational amplifier (1U7A) positive input and earth potential respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204722329U CN202363868U (en) | 2011-11-24 | 2011-11-24 | Intelligent low-voltage circuit breaker selective in grounding protection and electricity leakage protection functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204722329U CN202363868U (en) | 2011-11-24 | 2011-11-24 | Intelligent low-voltage circuit breaker selective in grounding protection and electricity leakage protection functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202363868U true CN202363868U (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204722329U Expired - Fee Related CN202363868U (en) | 2011-11-24 | 2011-11-24 | Intelligent low-voltage circuit breaker selective in grounding protection and electricity leakage protection functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202363868U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229937A (en) * | 2016-08-19 | 2016-12-14 | 天津市百利电气有限公司 | Have the chopper of ground protection and creepage protection function concurrently |
| CN106330155A (en) * | 2016-08-30 | 2017-01-11 | 合肥博雷电气有限公司 | Solid-state relay with self-breaking function |
-
2011
- 2011-11-24 CN CN2011204722329U patent/CN202363868U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229937A (en) * | 2016-08-19 | 2016-12-14 | 天津市百利电气有限公司 | Have the chopper of ground protection and creepage protection function concurrently |
| CN106229937B (en) * | 2016-08-19 | 2018-08-21 | 天津市百利电气有限公司 | Have the breaker of ground protection and creepage protection function concurrently |
| CN106330155A (en) * | 2016-08-30 | 2017-01-11 | 合肥博雷电气有限公司 | Solid-state relay with self-breaking function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20181124 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |