CN101051582A - Intelligent comprehensive leakage relay - Google Patents
Intelligent comprehensive leakage relay Download PDFInfo
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- CN101051582A CN101051582A CN 200610075096 CN200610075096A CN101051582A CN 101051582 A CN101051582 A CN 101051582A CN 200610075096 CN200610075096 CN 200610075096 CN 200610075096 A CN200610075096 A CN 200610075096A CN 101051582 A CN101051582 A CN 101051582A
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- leakage relay
- comprehensive leakage
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Abstract
The disclosed leakage relay includes signal sensor unit, control process unit. Characters are that the signal sensor unit is composed of load current transformers (1,2,3) and zero sequence current transformer (4). Passing through A phase line, B phase line, C phase line respectively, and the signal sensor unit, the load current transformers (1,2,3) are connected to the control process unit composed of single chip circuit, display circuit, and control relay. The disclosed multifunctional intellectualized integrative leakage relay solves disadvantages of present protective relay of residual current.
Description
Technical field
The present invention relates to aftercurrent action protecting equipment, belong to electric and electronic technical field.
Technical background:
At present, the residual current protecting in the electrical network (earth leakage protective just) device mainly contains two kinds of forms: 1, residual current circuit breaker 2, residual current protecting relay+A.C. contactor.These two kinds of forms, especially the form that cooperates with residual current protecting relay and contactor is the most general.But existing all residual current protecting relays only have residual current protecting function (as " leakage relay patent 01209391.2 ", " phase-detecting amplitude-detecting leak relay 99229233.6 ").In order to prevent that distribution transformer from damaging because of overcurrent, short circuit, when being installed, residual current operated protective device also fuse or circuit breaker to be installed, and so just caused the increase of distribution box volume, cost to improve.
The present invention proposes a kind of intelligent comprehensive leakage relay of multi-functional, band overcurrent, short-circuit function, solves the shortcoming that present residual current protecting relay exists.
Summary of the invention:
Technical scheme of the present invention is: the present invention includes signal transducer unit (I) and controlled processing unit (II).Signal transducer unit (I) is made of load current instrument transformer (1,2,3), zero sequence current mutual inductor (4), three load current instrument transformers (1,2,3) pass A phase, B phase, the C phase line of power circuit respectively, zero sequence current mutual inductor (4) passes A, B, C, N line, and the output of signal transducer unit (I) is connected with controlled processing unit (II).Controlled processing unit (II) is made of single chip circuit (5), display circuit (6), control relay (7), and it is connected with the zero sequence current mutual inductor (4) of signal transducer unit (I) and the output of load current instrument transformer (1,2,3).Load current instrument transformer (1,2,3) is gathered the residual current signal of three-phase load current signal, zero sequence current mutual inductor (4) collection main circuit, and signal sent into single chip circuit (5) through amplifying, handling, single chip circuit analyzes and controls the current value that display circuit (6) shows sampling to signal; Single chip circuit (5) is judged signal: if load current surpass to surpass set point, single chip circuit (5) thinks that promptly over current fault control relay (7) takes place to move immediately and play a protective role.If the residual current signal transfinites, single chip circuit (5) thinks that then leak current fault control control relay (7) takes place to move immediately and play a protective role.
Display circuit of the present invention (6) is made of charactron (LED1), drive circuit (Q2, Q3, Q4, Q5), button (S4, S5); Single chip circuit of the present invention (5) is made of chip microprocessor (U2), power circuit, amplifying circuit; Power circuit is made of power transformer (T1), rectifying tube (D3, D4, D5, D6), electric capacity (C1, C2, C3, C4), regulator block (U3, U4).Amplifying circuit is made of resistance (R1, R2, R3, R4), diode (D1, D2), operational amplifier (U1).
Single chip circuit of the present invention (5) also can be connected with the real time clock circuit that is made of clock chip (IC3), backup battery (BT1), diode (D10, D11).
The present invention has multi-functional, and overcurrent, short circuit, earth leakage protective are combined, and has reduced the volume of distribution box, has reduced the manufacturing cost of distribution box, promotes to have very big economic benefit in China's rural power grids
Be described in detail realization principle of the present invention and embodiment below in conjunction with accompanying drawing.
Description of drawings:
Fig. 1 is a theory diagram of the present invention
Fig. 2 is an electrical schematic diagram of the present invention
Embodiment:
With reference to the accompanying drawings 1
The present invention includes signal transducer part (I) and control and treatment part (II).Signal transducer part (I) is made of three load current instrument transformers (1,2,3), zero sequence current mutual inductor (4), three load current instrument transformers (1,2,3) pass A phase, B phase, the C phase line of main circuit respectively, zero sequence current mutual inductor (4) passes A, B, C, N line, and the output signal of signal transducer part (I) is connected with control and treatment part (II).Control and treatment part (II) is made of single chip circuit (5), display circuit (6), control relay (7).
With reference to the accompanying drawings 2
Distribution transformer (T2) and outlet line thereof constitute A, B, C, N distribution line.Electric current current transformer of the present invention (CT1, CT2, CT3) passes A, B, C, N circuit respectively; Zero sequence current mutual inductor (CT4) passes A, B, C, N circuit.
Single chip circuit (5) is made of chip microprocessor (U2), power circuit, amplifying circuit
Power transformer (T1), rectifying tube (D3, D4, D5, D6), electric capacity (C1, C2, C3, C4), regulator block (U3, U4) constitute power circuit.Resistance (R1, R2, R3, R4), diode (D1, D2), operational amplifier (U1) constitute amplifying circuit.
The signal of zero sequence current mutual inductor (CT4) output is connected with the IO mouth of chip microprocessor (U2) through behind the amplifying circuit, and current transformer (CT1, CT2, CT3) output signal is connected with chip microprocessor (U2).The built-in analog-digital converter of chip microprocessor (U2) (AD) converts transducer signal to digital signal, and (U2) carries out program control at chip microprocessor.Chip microprocessor (U2) control display circuit shows the signal value of gathering.
Display circuit is made of multidigit nixie tube (LED1), drive circuit (Q2, Q3, Q4, Q5), button (S4, S5).The IO mouth of chip microprocessor (U2) is connected with charactron (LED1), drive circuit (Q2, Q3, Q4, Q5), button (S4, S5) respectively.
The State Control charactron that chip microprocessor (U2) is accepted button shows corresponding information.
Chip microprocessor (U2) will be changed the digital signal of gained and built-in controlling value compares, if the control relay loop that the then IO mouth output signal control of chip microprocessor that exceeds standard is made of resistance (R5), triode (Q1), relay (K1).The contact of relay (K1) is connected with external communication contactor (CJ1), after the actuating of relay, and the power supply of A.C. contactor (CJ1) tripping operation excision distribution line.
The IO mouth of chip microprocessor (U2) also connects real time clock circuit, and real time clock circuit is made of clock chip (IC3), backup battery (BT1), diode (D10, D11).Real time clock circuit provides system clock accurately, and chip microprocessor (U2) reads this time value in order to purposes such as record trip times.
The present invention has multi-functional, and overcurrent, short circuit, earth leakage protective are combined, and has reduced the volume of distribution box, has reduced the manufacturing cost of distribution box, promotes to have very big economic benefit in China's rural power grids.
Claims (6)
1. intelligent comprehensive leakage relay, comprise signal transducer unit (I) and controlled processing unit (II), it is characterized in that: signal transducer unit (I) is made of load current instrument transformer (1,2,3), zero sequence current mutual inductor (4), load current instrument transformer (1,2,3) passes A phase, B phase, the C phase line of power circuit respectively, and signal transducer unit (I) is connected with the controlled processing unit (II) that is made of single chip circuit (5), display circuit (6), control relay (7).
2. an intelligent comprehensive leakage relay is characterized in that the described display circuit of claim 1 (6) is made of charactron (LED1), drive circuit (Q2, Q3, Q4, Q5), button (S4, S5).
3. an intelligent comprehensive leakage relay is characterized in that the described single chip circuit of claim 1 (5) is made of chip microprocessor (U2), power circuit, amplifying circuit.
4. an intelligent comprehensive leakage relay is characterized in that the described power circuit of claim 3 is made of power transformer (T1), rectifying tube (D3, D4, D5, D6), electric capacity (C1, C2, C3, C4), regulator block (U3, U4).
5. an intelligent comprehensive leakage relay is characterized in that the described amplifying circuit of claim 3 is made of resistance (R1, R2, R3, R4), diode (D1, D2), operational amplifier (U1).
6. an intelligent comprehensive leakage relay is characterized in that the described single chip circuit of claim 1 (5) also can be connected with the real time clock circuit that is made of clock chip (IC3), backup battery (BT1), diode (D10, D11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610075096 CN101051582A (en) | 2006-04-03 | 2006-04-03 | Intelligent comprehensive leakage relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610075096 CN101051582A (en) | 2006-04-03 | 2006-04-03 | Intelligent comprehensive leakage relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101051582A true CN101051582A (en) | 2007-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610075096 Pending CN101051582A (en) | 2006-04-03 | 2006-04-03 | Intelligent comprehensive leakage relay |
Country Status (1)
| Country | Link |
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| CN (1) | CN101051582A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895087A (en) * | 2009-05-20 | 2010-11-24 | 三菱电机株式会社 | Circuit-breaker and method of controlling operation thereof |
| CN101741059B (en) * | 2009-12-31 | 2012-11-21 | 嘉兴市永信电子有限公司 | Intelligent electronic leakage protector |
| CN104201642A (en) * | 2014-07-31 | 2014-12-10 | 国家电网公司 | Electric leakage overcurrent protection device with intelligent ammeter |
-
2006
- 2006-04-03 CN CN 200610075096 patent/CN101051582A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895087A (en) * | 2009-05-20 | 2010-11-24 | 三菱电机株式会社 | Circuit-breaker and method of controlling operation thereof |
| CN101741059B (en) * | 2009-12-31 | 2012-11-21 | 嘉兴市永信电子有限公司 | Intelligent electronic leakage protector |
| CN104201642A (en) * | 2014-07-31 | 2014-12-10 | 国家电网公司 | Electric leakage overcurrent protection device with intelligent ammeter |
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