CN203275932U

CN203275932U - Intelligent electricity leakage control digit circuit

Info

Publication number: CN203275932U
Application number: CN201320319873XU
Authority: CN
Inventors: 高凯
Original assignee: SUZHOU ZHIXUN ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: SUZHOU ZHIXUN ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2013-06-05
Filing date: 2013-06-05
Publication date: 2013-11-06
Anticipated expiration: 2023-06-05

Abstract

The utility model discloses an intelligent electricity leakage control digit circuit, comprising a power circuit, a leakage sampling circuit, a leakage protection value setting current, a leakage time value setting circuit, a leakage trip circuit, a leakage test circuit, a reference voltage circuit, a singlechip and an automatic reclosing interface circuit. The current with AC220v voltage passes through the power circuit. The intelligent electricity leakage control digit circuit has low cost and a small volume, and is digitalized. Besides, the intelligent electricity leakage control digit circuit also has functions of communication and automatic reclosing. The intelligent electricity leakage control digit circuit solves the problem that the conventional leakage switch generates heat because the voltage range is wide (AC45V-AC300V) and is restricted by a dedicated chip (M54133).

Description

Intelligent electric leakage control figure circuit

Technical field

The utility model relates to the electronic circuit technology field, particularly relates to a kind of intelligent electric leakage control figure circuit.

Background technology

Existing leakaging controller is to adopt mimic channel, and for example traditional M54133, adopt the resistance step-down, and working range is very narrow, easily heating; The electric leakage signal maximal value that gathers only has 0.7V, poor anti-interference; During the electric leakage time-delay, can only delay time with electric capacity, the time is inaccurate; Requirement to electric capacity is higher, and electric capacity is difficult to again distinguish, not easy-maintaining; The chip of M54133 is somewhat expensive in addition, a slice domestic between 7 ~ 8 yuan, import more expensive.And mimic channel can not carry out automatic reclosing function, can not carry out the communication networking function; Limited by proprietary electric leakage module, cause precision not high, poor anti-interference affects safety utilization of electric power.During for leakage tests, must be by providing signal on creepage mutual inductor, operation does not have AC220V to contact with human body very the time, and the possibility of the body of hurting sb.'s feelings is arranged; Also improved simultaneously the cost of creepage mutual inductor; When adjusting for electric leakage, can only be undertaken by changing sampling resistor, like this creepage mutual inductor be had a coherence request higher, also improve the cost of creepage mutual inductor.

The utility model content

The technical matters that the utility model mainly solves is to provide a kind of intelligent electric leakage control figure circuit, low cost, and microbody is long-pending has digitizing, but communication has automatic reclosing function.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of intelligent electric leakage control figure circuit is provided, it is characterized in that, comprising: power circuit, electric leakage sample circuit, earth leakage protection value adjust circuit, electric leakage time value adjust circuit, leakage tripping circuit, leakage tests circuit, reference voltage circuit, single-chip microcomputer and automatic reclosing interface circuit; The voltage that described power circuit passes through is for exchanging AC220V voltage;

the first pin ground connection of single-chip microcomputer, the 20 pin of single-chip microcomputer connects power circuit, the output terminal of power circuit connects a reference voltage circuit, the 4th pin of single-chip microcomputer connects the leakage tests circuit, the 6th pin of single-chip microcomputer connects power circuit by a resistance and forms reset circuit of SCM, the 7th pin of single-chip microcomputer connects the automatic reclosing interface circuit, the 19 pin of single-chip microcomputer connects the electric leakage sample circuit, the 18 pin of single-chip microcomputer connects the earth leakage protection value circuit of adjusting, the 17 pin of single-chip microcomputer connects the electric leakage time value circuit of adjusting, the 15 pin of single-chip microcomputer connects the leakage tripping circuit, the 12 pin and the 13 pin of single-chip microcomputer are communication interface circuit.

In the utility model, the communication interface of described single-chip microcomputer is the TX interface, and the automatic reclosing interface of automatic reclosing interface circuit is the AT1 interface.

The beneficial effects of the utility model are: the utility model solves current existing leakage switch anti-interference problem; solved the problem that existing leakage switch generates heat because of voltage range wide (AC45V-AC300V); the inaccurate problem of delay time; the coarse problem of earth leakage protection value; promote the communication function that original leakage switch does not possess, had automatic reclosing function.

Description of drawings

Fig. 1 is the circuit design principle figure of the intelligent electric leakage control figure of the utility model circuit;

Fig. 2 is the sign picture that in the intelligent electric leakage control figure of the utility model circuit, the single-chip microcomputer pin connects each circuit diagram.

In accompanying drawing, the mark of each parts is as follows: 1, power circuit; 2, electric leakage sample circuit; 3, the earth leakage protection value circuit of adjusting; 4, the electric leakage time value circuit of adjusting; 5, leakage tripping circuit; 6, leakage tests circuit; 7, reference voltage circuit; 8, single-chip microcomputer; 9, automatic reclosing interface circuit.

Embodiment

Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection domain of the present utility model is made more explicit defining.

See also Fig. 1, the circuit design principle figure of the intelligent electric leakage control figure of the utility model circuit, in figure, the interface symbol of every section circuit is represented by the circuit industry standard, the utility model embodiment comprises: a kind of intelligent electric leakage control figure circuit comprises: power circuit 1, electric leakage sample circuit 2, earth leakage protection value adjust circuit 3, electric leakage time value adjust circuit 4, leakage tripping circuit 5, leakage tests circuit 6, reference voltage circuit 7, single-chip microcomputer 8 and automatic reclosing interface circuit 9; The voltage that described power circuit 1 passes through is for exchanging AC220V voltage;

see also Fig. 2, the first pin ground connection of single-chip microcomputer 8, the 20 pin of single-chip microcomputer connects power circuit 1, the output terminal of power circuit 1 connects a reference voltage circuit 7, the 4th pin of single-chip microcomputer connects leakage tests circuit 6, the 6th pin of single-chip microcomputer connects power circuit 1 by a resistance R 7 and forms reset circuit of SCM, the 7th pin of single-chip microcomputer connects automatic reclosing interface circuit 9, the 19 pin of single-chip microcomputer connects electric leakage sample circuit 2, the 18 pin of single-chip microcomputer connects the earth leakage protection value circuit 3 of adjusting, the 17 pin of single-chip microcomputer connects the electric leakage time value circuit 4 of adjusting, the 15 pin of single-chip microcomputer connects leakage tripping circuit 5, the 12 pin and the 13 pin of single-chip microcomputer 8 are communication interface circuit.

Furtherly, the communication interface of described single-chip microcomputer is the TX interface; The automatic reclosing interface of described automatic reclosing interface circuit is the AT1 interface.

In the intelligent electric leakage control figure of the utility model circuit, wherein power circuit 1 is by exchanging AC220V voltage, through voltage dependent resistor (VDR) RV1, carry out coil L1, inductance L 2, resistance R 2, capacitor C 2, resistance R 3, bridge heap D5, voltage stabilizer TV1, electrochemical capacitor E1, capacitor C 3, voltage stabilizer U3, electrochemical capacitor E2, the circuit that capacitor C 4 forms offers the power supply of this intelligent leakaging controller work; Its electric leakage sample circuit 2 comprises resistance R 8, capacitor C 6 and resistance R 9, this intelligent leakage control circuit Creepage mutual inductorThrough interface J3, resistance R 8, capacitor C 6, resistance R 9 enter single-chip microcomputer U1 and carry out the electric leakage signal sampling; Its earth leakage protection value circuit 3 of adjusting comprises resistance R 17 and potentiometer RW2, and the earth leakage protection value circuit 3 of adjusting enters single-chip microcomputer U1 and samples, and obtains protecting accordingly electrical leakage; The electric leakage time value circuit 4 of adjusting comprises resistance R 18 and potentiometer RW2, and the electric leakage time value circuit 4 of adjusting enters single-chip microcomputer U1 and samples, and obtains corresponding protection electric leakage delay time value; Leakage tripping circuit 5 comprises transistor U2, capacitor C 1, and resistance R 1, optocoupler OP1, resistance R 4 and R6, leakage tripping circuit 5 is assigned trip signal by the mouth line of single-chip microcomputer U1; Leakage tests circuit 6 is by the test coil of the creepage mutual inductor interface through TEST, by resistance R 10, switch SW-PB built-up circuit, in leakage tests circuit 6, inductance L 1, if the signal that L2 adopts creepage mutual inductor to produce test, incoming transport power supply AC220V; If directly adopt single-chip microcomputer to test, inductance L 1 is met power supply VCC, inductance L 2 meets DGND, and the TEST interface connects a resistance R 10, simultaneously the first pin of interface TEST is connect the 4th pin of single-chip microcomputer; Reference voltage circuit 7 is by resistance R 5, voltage stabilizer TL1, the circuit that capacitor C 5 and electrochemical capacitor E3 form.

The utility model adopts single-chip microcomputer to carry out earth leakage protection, broken the mode of traditional M54133, adopt digitizer earth leakage protection, circuit is simple, and sampled voltage is from 0-5V, improved antijamming capability, as long as provide corresponding mouthful of line, just can leak electricity and adjust and time setting, adopt single-chip microcomputer to write, internal memory is too not high, as long as the FLASH space of 2K; Resource to single-chip microcomputer is not many, so this kind of single-chip microcomputer cost is low, adopts the single-chip microcomputer of low-power consumption, easily solved working power, requirement to creepage mutual inductor is too not high, if require electric leakage sampling high precision, as long as add that an E2PROM carries out anti-the correction.

The above is only example of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.

Claims

1. intelligent electric leakage control figure circuit, it is characterized in that, comprising: power circuit, electric leakage sample circuit, earth leakage protection value adjust circuit, electric leakage time value adjust circuit, leakage tripping circuit, leakage tests circuit, reference voltage circuit, single-chip microcomputer and automatic reclosing interface circuit; The voltage that described power circuit passes through is for exchanging AC220V voltage;

2. intelligent electric leakage control figure circuit according to claim 1, it is characterized in that: the communication interface of described single-chip microcomputer is the TX interface, the automatic reclosing interface of described automatic reclosing interface circuit is the AT1 interface.