A kind of earth leakage protective device with wireless communication function
Technical field
The utility model relates to a kind of electric protection device, relates in particular to a kind of earth leakage protective device with wireless communication function.
Background technology
Earth leakage protective device is a kind of important equipment of low voltage electric network, for preventing that fire, device damage, human casualty accident because of electric leakage causes from playing an important role.Low voltage electric network has generally been installed earth leakage protective device at present; but the management of earth leakage protective device is a thing that bothers very much; need the special messenger of power supply school periodical inspection; and; present earth leakage protective device only provides basic protection, substantially all is that the unit mode is worked, and can't judge line conditions for power supply department provides data; the problem that have function singleness, can't network, power supply department also can't effectively be monitored it.Therefore, the earth leakage protective device of electrical network can't satisfy situation particularly residual current situation monitor, to earth leakage protective device operation carry out scientific management the needs of power department to low voltage electric network at present.
Summary of the invention
In order to solve above-mentioned technical problem; the purpose of this utility model provides a kind of earth leakage protective device with wireless communication function; realize the wireless telecommunications of earth leakage protective device and PC or electric network data server by wireless communication module, thus realize power department to the situation of low voltage electric network particularly the residual current situation monitor, earth leakage protective device moved carry out scientific management.
To achieve the above object, the utility model has adopted following technical scheme:
A kind of earth leakage protective device with wireless communication function; comprise the Single-chip Controlling unit; the input of Single-chip Controlling unit is connected with leakage current detection module and three-phase voltage, current detection module; the output of Single-chip Controlling unit is connected with circuit breaker control module and output display module; the I/O port of described Single-chip Controlling unit is connected with wireless communication module, and described wireless communication module is for adopting the integrated data transmission module of wireless transmission method.
As preferably, described wireless communication module is GSM/GPRS data transmission module or CDMA data transmission module.
As preferably, described wireless communication module is connected with the Single-chip Controlling unit by photoelectrical coupler.
Described Single-chip Controlling unit is connected with the divide-shut brake detection module.
The utility model is owing to adopted above technical scheme; adopt wireless communication modules such as GSM/GPRS data transmission module or CDMA data transmission module to realize the wireless telecommunications of earth leakage protective device and PC or electric network data server; thereby realize power department to the situation of low voltage electric network particularly the residual current situation monitor, to earth leakage protective device operation carrying out scientific management, reduce the cost of arranging net, convenient networking.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model;
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is made a detailed explanation.
Embodiment 1:
A kind of earth leakage protective device as shown in Figure 1 with wireless communication function; comprise the Single-chip Controlling unit; the input of Single-chip Controlling unit is connected with leakage current detection module and three-phase voltage, current detection module; the output of Single-chip Controlling unit is connected with circuit breaker control module and output display module; the I/O port of described Single-chip Controlling unit is connected with wireless communication module, and described wireless communication module is for adopting the integrated data transmission module of wireless transmission method.
In the present embodiment, the leakage current detection module will obtain leakage current by the two stage amplifer electric circuit inspection from the electric current of zero-sequence transformer collection, and first order discharge circuit is realized the full-wave rectification of leakage current, and second level discharge circuit detects the peak value of rectification after-current.The Single-chip Controlling unit is according to the size of the mean value calculation circuit breaker leakage current of the peak value of repeatedly sampling.Three-phase voltage, current detection module adopt chip ATT7026A to detect.ATT7026A is the special-purpose computation chip of a high accuracy three-phase electric energy, is applicable to phase three-wire three and three-phase and four-line, can accurately measure the effective value of each phase voltage, electric current.The Single-chip Controlling unit can read each phase voltage, current value easily by the SPI interface of ATT7026A.What described wireless communication module adopted is the GSM/GPRS data transmission module; utilize the GSM/GPRS data transmission module can realize the wireless telecommunications of earth leakage protective device and PC etc.; the instant information of transmitting earth leakage protective device; GSM/GPRS data transmission module and Single-chip Controlling unit are by photoelectric coupler isolation, with the protection single-chip microcomputer.The circuit breaker control module finally realizes the control of circuit breaker, is made up of three relays, realizes circuit-breaker-motor control, tripping operation control and tripping operation communication respectively by three relays.When single-chip microcomputer detects leakage current, at 100mS inner control tripping relay, make circuit breaker trip, and control tripping operation communication relay, send the tripping operation notice.After fault was got rid of, Single-chip Controlling Electric Machine Control relay made breaker closing.Described Single-chip Controlling unit also is connected with the divide-shut brake detection module, and the divide-shut brake detection module is used to detect current circuit-breaker status, and promptly circuit breaker is in separating brake or "on" position, for the control of circuit breaker is submitted necessary information.The output display module is meant external 5 charactrons in Single-chip Controlling unit and 13 LED light: 5 charactrons can show each electric current, voltage mutually, leakage current, and failure cause etc., 13 LED light can be indicated various faults and associative operation; And external 6 buttons, these 6 buttons are respectively the debugging key, key, deciliter key, left button, right button and TEST key are set, and can realize debugging and operations such as protector, inquiry stored information are set by these 6 buttons.Supply module is the extremely important part of system, and present embodiment adopts two switching power source chips to constitute the two-way power supply, and wherein one road power supply is the wireless communication line power supply specially.