CN203674687U

CN203674687U - Intelligent residual-current circuit breaker

Info

Publication number: CN203674687U
Application number: CN201420043448.7U
Authority: CN
Inventors: 李明
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-01-23
Filing date: 2014-01-23
Publication date: 2014-06-25
Anticipated expiration: 2024-01-23

Abstract

Disclosed in the utility model is an intelligent residual-current circuit breaker comprising an ARM processor, a zero-sequence current transformer, a three-phase current transformer, a three-phase voltage transformer, a liquid crystal display screen, a circuit breaker driving switch circuit, an alarm circuit and a wireless GPRS communication module. The zero-sequence current transformer is connected with the ARM processor by a leakage current acquisition circuit; the three-phase current transformer is connected with the ARM processor by a three-phase current acquisition circuit; and the three-phase voltage transformer is connected with the ARM processor by a three-phase voltage acquisition circuit. The output terminal of the ARM processor is respectively connected with the liquid crystal display screen, the circuit breaker driving switch circuit, and the alarm circuit; and the ARM processor carries out communication with a monitoring terminal by the wireless GPRS communication module. According to the scheme, wiring and installing can be carried out conveniently; the function expanding can be carried out conveniently; the emergency illumination circuit is arranged and the design logic is clear; and the circuit breaker can be realized easily. Therefore, the provided circuit breaker has the good application prospects.

Description

A kind of Intellectual leakage breaker

Technical field

The utility model relates to a kind of Intellectual leakage breaker, belongs to power control technology field.

Background technology

Along with the continuous fast development of electric power system; the safety of electric power system has also obtained more multiple looking; in electrical grounding fault, electric arc shorted to earth is the major reason that causes electrical fire; electric arc shorted to earth has very large impedance and voltage drop; it has limited fault current; make overcurrent protective device akinesia or can not move in time to cut off the electricity supply, and the localized hyperthermia that the electric leakage arc of hundreds of milliampere produces can reach more than 2000 DEG C, be enough to ignite combustible around and cause fire.And power consumption equipment is distributed in each corner of building, damaging range is wide, if the electric leakage to system is not monitored and prevention and control, will constitute a threat to the person and property safety, has very large disaster hidden-trouble.

Intellectual leakage breaker can accurately be monitored fault and the abnormality of electric wiring, can effectively prevent common to cause the caused building electric fire accident of ground arc because of electric leakage, in order to ensure people life property safety, on the electric power incoming line place of building and main line, Intellectual leakage breaker is installed very necessary, but, at present, Intellectual leakage breaker, or carry out data communication by traditional serial communication and host computer, very inconvenient in building wiring, install inconvenient, and, the processor adopting is single-chip microcomputer, processing speed is slow, Peripheral Interface is single, be inconvenient to expand other functions.

Utility model content

The purpose of this utility model is in order to overcome existing Intellectual leakage breaker, adopts and carries out data communication by traditional serial communication and host computer, wiring, installation inconvenience, and employing single-chip microcomputer, processing speed is slow, and Peripheral Interface is single, is inconvenient to expand the problem of other functions.

In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:

A kind of Intellectual leakage breaker, it is characterized in that: comprise arm processor, zero sequence current mutual inductor, threephase current transformer, threephase potential transformer, LCDs, circuit breaker driving switch circuit, warning circuit and wireless GPRS communication module, described zero sequence current mutual inductor is connected with arm processor by leakage current Acquisition Circuit, described threephase current transformer is connected with arm processor by three-phase current Acquisition Circuit, described threephase potential transformer is connected with arm processor by three-phase voltage Acquisition Circuit, the output of described arm processor respectively with LCDs, circuit breaker driving switch circuit, warning circuit is connected, described arm processor also carries out communication by wireless GPRS communication module and monitoring terminal.

Aforesaid a kind of Intellectual leakage breaker, it is characterized in that: also comprise emergency lighting circuit, watchdog circuit and power circuit, described watchdog circuit, emergency lighting circuit are connected with arm processor respectively, and the power output end of described power circuit is connected with the power input of each circuit.

Aforesaid a kind of Intellectual leakage breaker, is characterized in that: described zero sequence current mutual inductor is residual current detection circuit.

Aforesaid a kind of Intellectual leakage breaker, is characterized in that: described emergency lighting circuit adopts LED lighting source.

Aforesaid a kind of Intellectual leakage breaker, is characterized in that: in described warning circuit, be provided with APR9600 voice recording and playback ic.

The beneficial effects of the utility model are: Intellectual leakage breaker of the present utility model, adopt wireless GPRS communication module and monitoring terminal to carry out communication, convenient wiring is installed, and employing arm processor is kernel processor chip, peripheral device structure is many, facilitate Function Extension, and be provided with emergency lighting circuit, mentality of designing is clear, easily realize, have a good application prospect.

Brief description of the drawings

Fig. 1 is the system block diagram of Intellectual leakage breaker of the present utility model.

Fig. 2 is the fundamental diagram of zero sequence current mutual inductor of the present utility model.

Embodiment

Below in conjunction with Figure of description, the utility model is described in further detail.Following examples are only for the technical solution of the utility model is more clearly described, and can not limit protection range of the present utility model with this.

As shown in Figure 1, a kind of Intellectual leakage breaker, comprise arm processor, zero sequence current mutual inductor, threephase current transformer, threephase potential transformer, LCDs, circuit breaker driving switch circuit, warning circuit and wireless GPRS communication module, zero sequence current mutual inductor is connected with arm processor by leakage current Acquisition Circuit, threephase current transformer is connected with arm processor by three-phase current Acquisition Circuit, threephase potential transformer is connected with arm processor by three-phase voltage Acquisition Circuit, the output of arm processor respectively with LCDs, circuit breaker driving switch circuit, warning circuit is connected, arm processor also carries out communication by wireless GPRS communication module and monitoring terminal, Intellectual leakage breaker of the present utility model adopts wireless GPRS communication module and monitoring terminal to carry out communication, convenient wiring is installed, time saving and energy saving, and to adopt arm processor be kernel processor chip, peripheral device structure is many, facilitate Function Extension, in warning circuit, being provided with APR9600 voice recording and playback ic coordinates other circuit formation APR9600 speech recording and reproducing core low in energy consumption, reliability is high, price is suitable, can recording playback one, user can be first voluntarily to after the operating state recording storage of circuit breaker, the situation of the signal parameter that in use can gather according to arm processor, play current state, with reminding user.

The utility model also comprises emergency lighting circuit, watchdog circuit and power circuit, watchdog circuit, emergency lighting circuit are connected with arm processor respectively, the power output end of power circuit is connected with the power input of each circuit, wherein watchdog circuit is used for preventing Intellectual leakage breaker in use, unexpected collapse (such as electrostatic interference), restart Intellectual leakage breaker, ensure the normal work of Intellectual leakage breaker; Emergency lighting circuit adopts LED lighting source, energy-conserving and environment-protective, and long service life, when at maintenance or installation Intellectual leakage breaker, if environment is darker, can throw light on by opening emergency lighting circuit.

Described zero sequence current mutual inductor is residual current detection circuit, allow three-phase and four-line wire together through a zero sequence current mutual inductor CT, a zero sequence current mutual inductor CT also can be installed on neutral line N, utilize these CT detect three-phase current phasor and, it is residual current, as shown in Figure 2, known according to circuit theory, in the time there is not equipment leakage or earth fault and three-phase load complete equipilibrium in circuit, in primary side, the vector of transient current is zero, be Ia+Ib+Ic+IN=0, the vector that produces magnetic flux in current transformer equals zero, now, induced current IL=0 in secondary coil, in the time there is insulation fault in protected circuit, load-side has lets out live stream over the ground, the vector of zero sequence current mutual inductor is non-vanishing, it is Ia+Ib+Ic+IN ≠ 0, the vector that produces magnetic flux in current transformer is also not equal to zero, now, in zero sequence current mutual inductor secondary winding, just produce induced current, it is residual current IL ≠ 0, as long as electric leakage or shock current reach residual operating current value, the secondary winding of zero sequence current mutual inductor is just exported a signal, give arm processor through leakage current Acquisition Circuit, arm processor output drive signal makes circuit breaker tripping by circuit breaker driving switch circuit, play electric leakage and electrical shock protection effect thereby cut off the electricity supply.

More than show and described general principle of the present utility model, principal character and advantage.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. an Intellectual leakage breaker, it is characterized in that: comprise arm processor, zero sequence current mutual inductor, threephase current transformer, threephase potential transformer, LCDs, circuit breaker driving switch circuit, warning circuit and wireless GPRS communication module, described zero sequence current mutual inductor is connected with arm processor by leakage current Acquisition Circuit, described threephase current transformer is connected with arm processor by three-phase current Acquisition Circuit, described threephase potential transformer is connected with arm processor by three-phase voltage Acquisition Circuit, the output of described arm processor respectively with LCDs, circuit breaker driving switch circuit, warning circuit is connected, described arm processor also carries out communication by wireless GPRS communication module and monitoring terminal.

2. a kind of Intellectual leakage breaker according to claim 1, it is characterized in that: also comprise emergency lighting circuit, watchdog circuit and power circuit, described watchdog circuit, emergency lighting circuit are connected with arm processor respectively, and the power output end of described power circuit is connected with the power input of each circuit.

3. a kind of Intellectual leakage breaker according to claim 1, is characterized in that: described zero sequence current mutual inductor is residual current detection circuit.

4. a kind of Intellectual leakage breaker according to claim 2, is characterized in that: described emergency lighting circuit adopts LED lighting source.

5. a kind of Intellectual leakage breaker according to claim 1, is characterized in that: in described warning circuit, be provided with APR9600 voice recording and playback ic.