CN2636475Y - Electron type rated current regulatable residual current protector - Google Patents

Abstract

An electronic residual current protector with adjustable rated current comprises an air circuit breaker 1, a release 2, a current sampling circuit 3, a function setting circuit 5, a display circuit 7, a reclosing mechanism 8, a power source circuit 4 and a shell. Wherein, the current sampling circuit is provided with a mutual current inductor to detect load current. An output terminal of the circuit 3 is connected with an input terminal of a single-chip microprocessor 6. An output terminal of the single-chip microprocessor 6 is respectively connected with input terminals of the release 2, the reclosing mechanism 8 and the display circuit 7. The shell is provided with a rated current adjuster. The utility model is utilized as an emergency protector in a low-voltage distribution network and has the advantages of compact mounting, automatic reclosing, adjustable rated current, digital calculation and strong universality, brings convenience to production scheduling of users and manufacturers and favors power supply management department to rationally distribute electric power.

Description

The adjustable residual current operated protective device of electronic type rated current

Technical field

The utility model relates to a kind of emergency protective circuit device, is electronic type, the residual current operated protective device that its rated current can be regulated as required.

Background technology

Residual current operated protective device is the important device that is related to safety utilization of electric power in the low voltage power distribution network, be subjected to personage's concern in many ways deeply, in recent years, through updating, some occur and had the residual current operated protective device of automatic reclosing (or claiming electric control) mechanism, what have has an overload protection function, the thermal effect that the electricity consumption miscarriage is given birth to makes the bimetal leaf bending, causing the release dropout, is a kind of mechanical type control device, and its rated current of this control mode is a definite value, can not regulate as required, load current value of a residual current operated protective device, versatility is poor, and the user uses inconvenience; Concerning exploitation producer, also inconvenient, this device one is worth, and certainly will increase model, the specification of product, and work such as the goods of putting, set out to streamline scheduling of production, storehouse make troubles and easily cause mistake.And the reasonable electric power that is unfavorable for electricity management department is allocated.

Summary of the invention

The residual current operated protective device pattern is a lot; split type; manually reclosing is integral type gradually; manual and the new of electric dual-purpose reclosing substitutes; but most of residual current operated protective devices include air circuit 1; release 2; current sampling circuit 3; function setting circuit 5; display circuit 7; power circuit 4; several major parts of reclosing mechanism 8 and shell; technical contribution of the present utility model is that current sampling circuit is except that gathering the residual current signal; also Current Transformer is gathered the load current signal on the phase line; if when exceeding rated current; through chip microprocessor 6 digital operations; instruction release 2 is threaded off; changed crooked by heating effect of current and original way that thread off with bimetal leaf; because the latter's thermal effect temperature is an interval value among a small circle, the decision rated current is unadjustable substantially.Adopted monolithic microplate reason machine 6, self-compiling program reaches the adjustable purpose of rated current through digital operation as required.The rated current adjusting device is installed on protector outer casing, and this available potentiometer or code switch wait as required to be regulated.These certainly reach adjustable purpose with the mode of analog circuit, do not need creative work to realize, but be very unwise move on Cost And Performance.When programming, make reclosing mechanism 8 in time of setting and number of times, realize automatic reclosing.For compact, reduce the residual current operated protective device volume, form each mechanism, circuit, the chip microprocessor of protector, all be installed in the shell (box), such integral type type, also has product to come out at existing patent disclosure, does not carefully state.

Description of drawings

Fig. 1 is the utility model electrical schematic diagram.

Fig. 2 is the utility model structured flowchart.

Embodiment

The utility model is described in further detail in conjunction with the embodiments and with reference to the accompanying drawings: the circuit structure of residual current operated protective device and with the concrete structure and the annexation of air circuit 1, tripping mechanism (device) 2, reclosing mechanism 8 etc.; The mounting means of above-mentioned each parts in a box etc. all is prior art, and the common scientific and technical personnel that go together know, and do not give unnecessary details for this reason.Technical contribution of the present utility model is to have the integral type residual current operated protective device that has automatic reclosing mechanism of overload protection function; threading off with bimetal leaf control originally; be modified into Current Transformer and detect load current; the employing electronics mode particularly mode of digital operation is controlled dropout and reclosing; make the unadjustable scalable that is modified into of rated current, embody convenient with advanced advantage.

Consult accompanying drawing 2, the utility model comprises air circuit 1, tripping mechanism (device) 2, current sampling circuit 3, function setting circuit 5, chip microprocessor 6, display circuit 7, power circuit 4, reclosing mechanism 8 and several major parts of shell.The output of current sampling circuit 3,5 liang of circuit of function setting circuit is connected with the input of chip microprocessor; The output of chip microprocessor 6 is connected with release 2, reclosing mechanism 8, display circuit 7 threes' input; Release 2 is controlled air circuit 1 with the output of reclosing mechanism 8.Display mode can use liquid crystal display, pointer demonstration, diode displaying etc. optional.

The utility model is in current sampling circuit, and except that detecting residual current, also Current Transformer detects each phase load electric current, and when wherein a phase or a few phase load electric current reached load current value, release 2 was threaded off.The demonstration that whether normal 7 pairs of three-phase currents of display circuit are, the reclosing blanking time of reclosing mechanism 8 and number of times etc. all pass through the digital operation of chip microprocessor 6 and send instruction, accomplish correct.The setting of every index realizes with self-compiling program.

The adjustable of rated current is toward low-key by the shell frame load current value of setting, consider cost, volume, performance, multiple factor such as easy for installation, do not adopt and set a shell frame load current value the highest and realize widely mode toward the numerous values of low-key, but with segmentation set, the mode of each section downward modulation.Therefore shell frame electric current can be set 800A, 630A, 400A, 200A etc.Current transformer can be used the coiling voluntarily of cold-reduced silicon sheet, enamelled wire; Chip microprocessor 6 can be selected the EM78P156 type chip microprocessor of Taiwan e dragon company production for use from commercially available acquisition, and the available programs coding of adjusting of rated current is set the stepless adjustment of also available potentiometer.Each phase real-time current value and rated current setting value dynamically show with LED.

The utility model compared to existing technology, have the rated current sectional and regulate as required, highly versatile, the user is easy to use, simultaneously put, the stock up delivery etc. of streamline scheduling of production, test, the storehouse of manufacturer such as is also brought convenience at advantage, more help the reasonable electric power allotment of electricity management department.

Claims (1)

1; the adjustable residual current operated protective device of a kind of electronic type rated current; comprise air circuit (1); tripping mechanism (2); current sampling circuit (3); function setting circuit (5); display circuit (7); power circuit (4); reclosing mechanism (8); it is characterized in that in the current sampling circuit (3); except that residual current detection device is arranged; detect the current transformer of load current in addition; this current sampling circuit (3) output links to each other with the input of chip microprocessor (6); the output of chip microprocessor (6) respectively with tripping mechanism (2); reclosing mechanism (8); display circuit (7) three's input links to each other, and shell has the rated current adjusting device.

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