CN2338898Y - Comprehensive protection arrangement for safety use of electricity - Google Patents
Comprehensive protection arrangement for safety use of electricity Download PDFInfo
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- CN2338898Y CN2338898Y CN 98229446 CN98229446U CN2338898Y CN 2338898 Y CN2338898 Y CN 2338898Y CN 98229446 CN98229446 CN 98229446 CN 98229446 U CN98229446 U CN 98229446U CN 2338898 Y CN2338898 Y CN 2338898Y
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Abstract
The utility model relates to a comprehensive protection arrangement for the safety use of electricity. The utility model is composed of an air circuit breaker (1) which is connected to a main return circuit, a zero sequence current mutual inductor (2), a return circuit current mutual inductor (3), a direct current regulated power supply (4), an electromagnetic trip device (5), a secondary side excess voltage and low-voltage protection unit (6), a trip switch control unit (7), an electric leakage protection unit (8), a time-based unit (9), a sound alarm unit (10), an over-current protection unit (11), a loading time delay unit (12) and a short circuit protection unit (13). Integrated circuit elements are adopted to form each protection unit, so the circuit structure can be simplified, and the control precision can be improved at the same time. The utility model has the characteristics of complete protection function, small volume, low cost and high control precision. The utility model is particularly applicable to the power supply circuits of various minitype electricity consumers and ordinary families, and is also applicable to the power supply circuits with high capacity after dilatancy.
Description
The utility model relates to a kind of protective device of safety utilization of electric power, particularly a kind of safety utilization of electric power protective device with integrated protection function.
In daily electric line, situations such as mains ripple is excessive, overcurrent, short circuit, electric leakage take place through regular meeting, generation the lighter of these situations jeopardizes power consumption equipment, and is heavy then jeopardize personal safety and cause fire.For the harm that prevents that above-mentioned unsafe factor from causing, people are provided with various Protector for using electricity in supply line.But the present various protective devices that use, the ubiquity function is all more single, and control precision is also relatively poor, does not reach the problem of desirable control effect.Other has some to have the integrated protection function, the protective device that control precision is higher, because its structure more complicated, cost is higher, only is suitable for the specific occasion and uses, and is difficult to small-sized electricity consumer and average family and accepts.
The purpose of this utility model is: provide a kind of control precision higher, cost of manufacture is lower, and collection overload, short circuit, electric leakage, overvoltage, kinds of protect function such as under-voltage are the safety utilization of electric power protective device of one.
Formation of the present utility model: it comprises the air circuit (1) that is connected on the current supply circuit, zero sequence current mutual inductor (2), loop current instrument transformer (3), D.C. regulated power supply (4), the overvoltage of electromagnetic tripping apparatus (5) and secondary side and under-voltage protection unit (6), dropout switch control unit (7), residual current protective unit (8), time-based unit (9), acoustic alarm unit (10), over-current protecting unit (11), doubly carry delay unit (12), short-circuit protection unit (13) constitutes, wherein the input of overvoltage and under-voltage protection unit (6) is connected with the output of D.C. regulated power supply (4), sampled signal is connected on the current supply circuit, and output is connected with the input of dropout switch control unit (7); The input of residual current protective unit (8) is connected with the zero sequence current mutual inductor secondary side, and output is connected with the input of dropout switch control unit (7); Over-current protecting unit (11), doubly carry the secondary side that delay unit (12) and short-circuit protection unit (13) are connected in loop current instrument transformer (3) in parallel, output is connected to the input of dropout switch control unit (7); The input of time-based unit (9) is connected to residual current protective unit (8) and over-current protecting unit (11), and output is connected to acoustic alarm unit (10).
In the above-mentioned safety utilization of electric power comprehensive protection device, described overvoltage and under-voltage protection unit (6) are made of the comparator that operational amplifier A 1, A2 form; Residual current protective unit (8) is made of the amplifier that triode BG1, operational amplifier A 3, A4 form; The comparator that over-current protecting unit (11) is made up of operational amplifier A 5 constitutes; Doubly carrying delay unit (12) is made of the RC delay circuit of three utmost point BG2 and its base stage and the comparator that operational amplifier A 7 is formed.
Compared with the prior art, the utility model adopts integrated circuit component to constitute each protected location, has also improved control precision when having simplified circuit structure.The feasible defencive function that the utlity model has is complete, and overall volume is little, and cost of manufacture is low, the characteristics that control precision is high.Be particularly suitable for being applied in the supply line in various small-sized electricity consumers and the average family, also be applied to behind the extendible capacity in the big capacity supply line.
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is a circuit structure schematic diagram of the present utility model.
The voltage signal of overvoltage of the present utility model and under-voltage protection unit (6) is taken from main circuit power supply, and when voltage was lower than set point, comparator A1 oppositely exported high level signal, makes the triode BG2 conducting of dropout switch control unit, the relay J energising; Normally opened contact J-1 in the electromagnetic tripping apparatus (5) makes coil L energising, makes air circuit (1) action disconnect power supply circuits.When voltage was higher than set point, comparator A2 exported high level signal, made triode BG2 conducting, and then disconnected current supply circuit.The sampled signal of residual current protective unit (8) is taken from the secondary side of zero sequence current mutual inductor (2); when leakage current during greater than set point; triode BG1 satisfies and closes conducting; collector potential descends; anti-phase output high level behind A3; export high level signal again after A4 amplifies, this high level signal makes triode BG2 conducting, and then disconnects current supply circuit.The sampled signal of over-current protecting unit (11) is taken from the secondary side of loop current instrument transformer (3), when loop current during greater than set point, the anti-phase output low level signal of comparator A5, this low level signal exports to and doubly carries delay unit (12), earlier through the RC of BG3 base stage delay circuit delay process, as belongs to long-time overcurrent, BG3 is turned off, comparator A6 exports high level signal, makes triode BG2 conducting, and then disconnects air circuit (1); When motor starting, short-time overload takes place, because the effect of RC delay circuit, BG3 can not turn-off immediately, thereby the situation of power cutoff can not take place.The sampled signal of short-circuit protection unit (13) is also taken from the secondary side of loop current instrument transformer (3), and when being short-circuited, voltage-stabiliser tube is breakdown, and comparator A7 exports high level signal, makes the BG2 conducting, and then disconnects main circuit power.Time-based unit (9) is a timing circuit, and effect is the operating time of control acoustic alarm unit (10), then cuts off audible alarm automatically; It is in residual current protective unit (8) action, and the output that the comparator A5 of electronegative potential or over-current protecting unit (11) appears in triode BG1 collector electrode moves when low level signal occurring for a long time.The model of operational amplifier A 1-A7 among Fig. 1 is HA17324, and the model of air circuit (1) is DZ47-60.
Claims (2)
1, a kind of safety utilization of electric power comprehensive protection device, it is characterized in that: it comprises the air circuit (1) that is connected on the current supply circuit, zero sequence current mutual inductor (2), loop current instrument transformer (3), D.C. regulated power supply (4), the overvoltage of electromagnetic tripping apparatus (5) and secondary side and under-voltage protection unit (6), dropout switch control unit (7), residual current protective unit (8), time-based unit (9), acoustic alarm unit (10), over-current protecting unit (11), doubly carry delay unit (12), short-circuit protection unit (13) constitutes, wherein the input of overvoltage and under-voltage protection unit (6) is connected with the output of D.C. regulated power supply (4), sampled signal is connected on the current supply circuit, and output is connected with the input of dropout switch control unit (7); The input of residual current protective unit (8) is connected with the zero sequence current mutual inductor secondary side, and output is connected with the input of dropout switch control unit (7); Over-current protecting unit (11), doubly carry the secondary side that delay unit (12) and short-circuit protection unit (13) are connected in loop current instrument transformer (3) in parallel, output is connected to the input of dropout switch control unit (7); The input of time-based unit (9) is connected to residual current protective unit (8) and over-current protecting unit (11), and output is connected to acoustic alarm unit (10).
2, a kind of safety utilization of electric power comprehensive protection device according to claim 1 is characterized in that: described overvoltage and under-voltage protection unit (5) are made of the comparator that operational amplifier A 1, A2 form; Residual current protective unit (8) is made of the amplifier that triode BG1, operational amplifier A 3, A4 form; The comparator that over-current protecting unit (11) is made up of operational amplifier A 5 constitutes; Doubly carrying delay unit (12) is made of the RC delay circuit of three utmost point BG2 and its base stage and the comparator that operational amplifier A 7 is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98229446 CN2338898Y (en) | 1998-08-31 | 1998-08-31 | Comprehensive protection arrangement for safety use of electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98229446 CN2338898Y (en) | 1998-08-31 | 1998-08-31 | Comprehensive protection arrangement for safety use of electricity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2338898Y true CN2338898Y (en) | 1999-09-15 |
Family
ID=33979341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98229446 Expired - Fee Related CN2338898Y (en) | 1998-08-31 | 1998-08-31 | Comprehensive protection arrangement for safety use of electricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2338898Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100470984C (en) * | 1999-11-30 | 2009-03-18 | Ge克里普萨尔中国有限公司 | Residual current circuit breaker |
| CN101976815A (en) * | 2010-09-29 | 2011-02-16 | 厦门振泰成科技有限公司 | Loaded multifunctional protection circuit |
| WO2017157288A1 (en) * | 2016-03-14 | 2017-09-21 | The Hong Kong Polytechnic University | Control circuit and high frequency circuit breaker |
| CN107561413A (en) * | 2017-10-19 | 2018-01-09 | 南京科瑞电力科技有限公司 | A kind of electric power power transmission and transformation Intelligent failure monitoring device |
-
1998
- 1998-08-31 CN CN 98229446 patent/CN2338898Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100470984C (en) * | 1999-11-30 | 2009-03-18 | Ge克里普萨尔中国有限公司 | Residual current circuit breaker |
| CN101976815A (en) * | 2010-09-29 | 2011-02-16 | 厦门振泰成科技有限公司 | Loaded multifunctional protection circuit |
| CN101976815B (en) * | 2010-09-29 | 2013-06-12 | 厦门振泰成科技有限公司 | Loaded multifunctional protection circuit |
| WO2017157288A1 (en) * | 2016-03-14 | 2017-09-21 | The Hong Kong Polytechnic University | Control circuit and high frequency circuit breaker |
| CN109478777A (en) * | 2016-03-14 | 2019-03-15 | 香港理工大学 | Control circuit and high frequency breaker |
| CN109478777B (en) * | 2016-03-14 | 2020-05-22 | 香港理工大学 | Control circuit and high-frequency circuit breaker |
| CN107561413A (en) * | 2017-10-19 | 2018-01-09 | 南京科瑞电力科技有限公司 | A kind of electric power power transmission and transformation Intelligent failure monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |