CN201336256Y - Intelligent electronic-type breaker - Google Patents

Abstract

The utility model relates to an intelligent electronic-type breaker which comprises a plastic pedestal, an upper cover, a switching-on and tripping mechanism, an output lug-plate component, an input lug-plate component, a fixed contact, a moving contact and an electronic control circuit. A miniature transformer and a rectification circuit are arranged in the electronic control circuit so as to supply a working power supply to a breaking current control circuit; a transformer recessed cavity matched with the miniature transformer is formed at the bottom of the pedestal corresponding to a rotating shaft; the transformer recessed-cavity is separated from an inner cavity of the pedestal; and the miniature transformer is arranged in the transformer recessed cavity. Because the transformer recessed cavity is formed at the bottom of the breaker, the possibility that the working power supply of the breaking current control circuit adopts a transformer and the rectification circuit can be provided, enough power supply can also be provided, the outputted voltage and outputted current are stabler, higher voltage-withstanding performance can be achieved, the reliability of the intelligent electronic-type breaker can be improved, and the service life can be prolonged.

Description

Smart electronics formula circuit breaker

Technical field

The utility model relates to a kind of smart electronics formula circuit breaker.

Background technology

Existing circuit breaker generally is divided into normal circuit breaker and smart electronics formula circuit breaker.Normal circuit breaker generally includes plastic feet, loam cake, space on the base is separated between several region, arc control device, rotating shaft and combined floodgate and tripping mechanism installation cavity and output connection chip module installing zone, be provided with input wires chip module and fixed contact in the arc control device, moving contact arm one end is fixed in the rotating shaft, moving contact on the other end stretches in the arc control device relative with fixed contact, closure or disjunction under the drive of combined floodgate and tripping mechanism.Normal circuit breaker all has the set point of fixing dropout action, and tripping mechanism action branch deenergizing when the electric current in the circuit reaches set point reaches the purpose of protection.But because the dropout of normal circuit breaker action set point is fixing uncontrollable, therefore just can not proper function when load changes, need to change, unusual inconvenience, the scope of application is greatly limited.Smart electronics formula circuit breaker has appearred for this reason.The parts of smart electronics formula circuit breaker in comprising above-mentioned normal circuit breaker, also be provided with electronic control circuit.The effect of electronic control circuit is the set point that can regulate the action of threading off as required.Electronic control circuit generally comprises current transformer and the breaking current control circuit that is through in the outlet line, and the components and parts of breaking current control circuit are installed on the printed wiring board and are installed in the plastic casing of circuit breaker.Because various parts have seldom had unnecessary space after installing in original normal circuit breaker housing, and the employing of smart electronics formula circuit breaker also is the housing the same with normal circuit breaker, the electronic control circuit rear space is narrower having increased, what have also is provided with display circuit and leakage control circuit, thus the breaking current control circuit usually can only by the input AC electricity directly after the step-down of RC circuit as working power.The advantage that though this circuit construction of electric power has simply, volume is little; but also exist output voltage and be subject to the operating load influence; can only adapt to little load occasion; after element is subjected to invasion and attack such as environment wet fog, dust; under the impact of electrical network peak values of ac, surge voltage; electronic component usually can be breakdown, causes the circuit breaker cisco unity malfunction, causes the Electrical Safety accident.

The utility model content

The purpose of this utility model is to provide in order to overcome the deficiencies in the prior art a kind of smart electronics formula circuit breaker of reliable operation.

The utility model is that the achieve the above object technical solution that adopted is as follows: a kind of smart electronics formula circuit breaker, comprise plastic feet, loam cake, close a floodgate and tripping mechanism, the output connection chip module, the input wires chip module, fixed contact, moving contact and electronic control circuit, it is characterized in that: described electronic control circuit is provided with miniature transformer and rectification circuit provides working power for the breaking current control circuit, the corresponding position of the bottom of described base and rotating shaft is provided with the transformer cavity that matches with miniature transformer, transformer cavity and base intracavity are isolated, and described miniature transformer is arranged in the transformer cavity.

Beneficial effect compared with prior art is: the utility model is owing to be provided with the transformer cavity in the bottom of circuit breaker, for the working power of breaking current control circuit adopts transformer and rectification circuit to provide may, therefore can provide enough powers, the voltage of output, electric current is more stable, have better insulation property than common RC element, have higher withstand voltage, simultaneously provide working power for the breaking current control circuit through step-down and rectification, can more effectively absorb surge voltage, prolong the useful life of the electronic component in the breaking current control circuit, improved the reliability of smart electronics formula circuit breaker.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Description of drawings

Accompanying drawing 1 is the utility model base specific embodiment stereochemical structure vertical view;

Accompanying drawing 2 is the utility model base specific embodiment stereochemical structure upward view;

Accompanying drawing 3 is an accompanying drawing 1A-A structure cutaway view;

Accompanying drawing 4 is the electronic control circuit block diagram;

Embodiment

With the three-phase intelligent electronic breaker is example; smart electronics formula circuit breaker comprises plastic feet 1; loam cake; close a floodgate and tripping mechanism; the output connection chip module; the input wires chip module; fixed contact; moving contact and electronic control circuit; as shown in Figure 4; electronic control circuit includes the over-current detection unit of instrument transformer and absolute value amplifier composition; the phase shortage detecting unit; micro controller unit; trip performance element and power subsystem; power subsystem is an over-current detection unit; phase shortage detecting unit and micro controller unit provide working power; the concrete circuit of electronic control circuit can be done corresponding design as the case may be; as increase creepage protection function, wherein power subsystem is made up of miniature transformer 2 and rectification circuit voltage stabilizing circuit.As Fig. 1, shown in 2, be provided with two longitudinal baffles 5 in the middle of on the base 1, article one, lateral partitions 6 is separated into 3 arc control device 7 with the space on the base 1, rotating shaft and combined floodgate and tripping mechanism installation cavity 8 and 3 output connection chip module installing zones 9, similar to conventional circuit breaker, be provided with input wires chip module and fixed contact in the arc control device 7, the longitudinal baffle 5 at rotating shaft and combined floodgate and tripping mechanism installation cavity 8 places is provided with U-shaped breach 10, rotating shaft is arranged on the U-shaped breach 10, combined floodgate is arranged in combined floodgate and the tripping mechanism installation cavity 8 equally with tripping mechanism, moving contact arm one end is fixed in the rotating shaft, moving contact on the other end stretches in the arc control device 7 relative with fixed contact, closure or disjunction under the drive of combined floodgate and tripping mechanism.Bottom and the corresponding position of rotating shaft at base 1 are provided with the transformer cavity 3 that matches with miniature transformer 2, it is isolated to be provided with dividing plate 4 equally between transformer cavity 3 and base 1 inner chamber, this dividing plate will be a little less than the bottom of U-shaped breach 10, and described miniature transformer 2 is fixedly installed in the transformer cavity 3.If cause to establish again one group of miniature transformer 2 and rectification circuit because having increased function such as leakage protection circuit; then can two transformer cavitys 3 that match with miniature transformer 2 be set in the bottom and the corresponding position of rotating shaft of base 1, described two groups of miniature transformers 2 are separately positioned in two transformer cavitys 3.Owing to be provided with the transformer cavity in the bottom of circuit breaker, for the working power of breaking current control circuit adopts transformer and rectification circuit to provide may, therefore can provide enough powers, voltage, the electric current of output are more stable, have better insulation property than common RC element, have higher withstand voltage, simultaneously provide working power for the breaking current control circuit through step-down and rectification, can more effectively absorb surge voltage, prolong the useful life of the electronic component in the breaking current control circuit, improved the reliability of smart electronics formula circuit breaker.

Claims (2)

1, a kind of smart electronics formula circuit breaker, comprise plastic feet, loam cake, combined floodgate and tripping mechanism, output connection chip module, input wires chip module, fixed contact, moving contact and electronic control circuit, it is characterized in that: described electronic control circuit is provided with miniature transformer and rectification circuit provides working power for the breaking current control circuit, the corresponding position of the bottom of described base and rotating shaft is provided with the transformer cavity that matches with miniature transformer, transformer cavity and base intracavity are isolated, and described miniature transformer is arranged in the transformer cavity.

2, smart electronics formula circuit breaker according to claim 1, it is characterized in that: described electronic control circuit is provided with two groups of miniature transformers and rectification circuit provides working power for the breaking current control circuit, the corresponding position of the bottom of described base and rotating shaft is provided with two transformer cavitys that match with miniature transformer, and described two groups of miniature transformers are separately positioned in two transformer cavitys.

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