CN2131236Y - Multifunctional protector for power use - Google Patents

Abstract

The utility model relates to a multifunctional protector for power utilization, which is composed of an electric leakage sampling circuit, a self-checking circuit, a control circuit, an over voltage circuit, a return circuit, an overload circuit and a working power supply circuit. Because an electric return mode is adopted after tripping operation, and a part of electronic components is disengaged from an electricity receiving state, the service life of the utility model is prolonged. The utility model has the advantage of safe utilization and can prevent household appliances from calamity accidents due to electricity leakage, overload and overvoltage.

Description

Multifunctional protector for power use

The utility model relates to a kind of multi-functional power protector, belongs to technical field of electrical equipment.

In using the electric equipment process, tend to occur electric shock accidents taking place because power consumption equipment leaks electricity, for trouble-saving generation, people are everlasting and install power protector in the power supply circuits, reach the purpose of safety utilization of electric power.But existing power protector is awarded electricity condition because its control circuit all is in, and mechanical reset device is adopted in the tripping operation back in addition, and therefore this power protector in use very easily damages, and has shortened useful life.

The purpose of this utility model provides a kind of long service life, and electronic resetting device is adopted in the tripping operation back, and has the multi-functional power protector of overvoltage, overload protection.

The purpose of this utility model is to realize by following technical measures: a kind of main by the sampling circuit of electric leakage of collecting electric leakage signal on the power supply; receive the control circuit of triggering signal in the sampling circuit of electric leakage, and can produce the multi-function protector that the self-checking circuit of electric leakage signal is formed.By power supply power supply mainly by bridge rectifier D ₈-D ₁₁On the input of the power circuit of being formed, be connected in series a relay J ₁, relay J ₁Normally closed some K _J1Insert on the power supply, the control of the controlled circuit of output of power circuit can form a closed-loop path; The excess load circuit receives the power circuit power supply, can promote control circuit work; Receive the control end of the overvoltage circuit output access control circuit of power circuit voltage signal; The reset circuit that can stop control circuit work is set between the output two ends of sampling circuit of electric leakage.

The utility model is owing to adopt electronic reset mode after tripping operation, and make a part of electronic component disengaging be subjected to electricity condition, thereby prolonged useful life, and had safe and reliable advantage, it can prevent that household electrical appliance from because of electric leakage, overload, overvoltage disaster accident taking place.

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

The technical characterictic of the utility model most preferred embodiment is described in further detail below in conjunction with accompanying drawing.

By the inductance coil L that is connected on the power supply network ₁, L ₂The L of mutual inductance with it ₃, be connected inductance coil L ₃The bridge rectifier D at two ends ₁-D ₄, and be connected across L ₃The filter capacitor C at two ends ₁, an end and bridge rectifier D ₁-D ₄Output connect the other end respectively with relative inductance coil L ₃The anti-interference capacitor C that end connects ₂And C ₃, be connected across bridge rectifier D ₁-D ₄Falling between output is extreme subtracts resistance R ₂With the secondary filtering capacitor C ₄The sampling circuit of electric leakage of forming; Be connected across on the power supply by resistance R ₁, K switch ₁Connect the self-checking circuit of being formed; By a controllable silicon D ₁₃Negative pole end and bridge rectifier D ₁-D ₄Output one end join, control the utmost point be connected to resistance R ₄Back and bridge rectifier D ₁-D ₂Another output join, between the control utmost point and negative pole end capacitor C is set ₆, light-emitting diode D ₁₂With shunt resistance R ₈Receive controllable silicon D after the parallel connection ₁₃Positive terminal on the control circuit formed.

A bridge rectifier D by the power supply power supply ₈-D ₁₁Input on, be connected in series a relay J ₁, relay J ₁Normally closed some K _J1Insert on the power supply bridge rectifier D ₈-D ₁₁Output one terminate at controllable silicon D ₁₃Negative pole end on, other end serial connection current-limiting resistance R ₇Back and light-emitting diode D ₁₂With shunt resistance R ₈Tie point join; By resistance R ₅, piezo-resistance R ₆The sample resistance that is concatenated into is connected across bridge rectifier D ₈-D ₁₁The output two ends on, at controllable silicon D ₁₆The control utmost point and sample resistance R ₅, R ₆Point of contact between be connected in series isolating diode D successively ₅, voltage stabilizing didoe D ₆, bidirectional diode D ₇, at controllable silicon D ₁₃Negative pole end and voltage stabilizing didoe D ₈With bidirectional diode D ₇Tie point between cross-over connection one anti-interference capacitor C ₇Serial connection overload relay J on power supply ₂, overload relay J ₂Normal battle of K _J2One terminates at current-limiting resistance R ₇On the end, the other end with by time delay resistance R ₉, bidirectional diode D ₁₄, isolating diode D ₁₅After being in series, receive resistance R ₄Input on, and at time delay resistance R ₉With controllable silicon D ₁₃Negative pole end between delay capacitor C is set ₈In bridge rectifier D ₁-D ₄Output two ends span was connected K switch ₂The discharge resistance R of control ₃With discharge capacity C ₅

When electric leakage, bridge rectifier D ₁-D ₄Output current is arranged, and trigger the controllable silicon conducting, make bridge rectifier D ₈-D ₁₁Output R ₇, R ₈And D ₁₂, D ₁₃Form closed-loop path, meanwhile bridge rectifier D ₈-D ₁₁Input input current input, relay J are arranged ₁Be subjected to electricity work, make normally closed some K _J1Disconnect and cut off power supply.

When excess load, relay J ₂Work, the K of often making war _J2Closure, electric current is by R ₇, K _J2, R ₉, C ₈, D ₁₄, D ₁₅, R ₄Trigger D ₁₃The control utmost point makes K _J1Disconnect.

When power supply voltage surpasses rated voltage, resistance R ₆Become Low ESR rapidly, and have electric current to flow through, at this moment R ₆With R ₅Produce dividing potential drop, make D ₇, D ₆D is passed through in conducting ₅Trigger D ₁₃The control utmost point, make relay J ₁Work, normally closed some K _J1Disconnect.

Work as relay J ₁Work makes normal battle of K _J1After the disconnection, connect K ₂Make controllable silicon D ₁₃The voltage of keeping pass through R ₃, C ₅Discharge rapidly, make relay J ₁Decompression quits work.

Claims (1)

1, a kind of by the inductance coil L that is connected on the power supply network ₁, L ₂The L of mutual inductance with it ₃, be connected inductance coil L ₃The bridge rectifier D at two ends ₁-D ₄, and be connected across L ₃The filter capacitor C at two ends ₁, an end and bridge rectifier D ₁-D ₄Output connect the other end respectively with relative inductance coil L ₃The anti-interference capacitor C that end connects ₂And C ₃, be connected across bridge rectifier D ₁-D ₄Damping resistance R between output is extreme ₂With the secondary filtering capacitor C ₄The sampling circuit of electric leakage of forming; Be connected across on the power supply by resistance R ₁, K switch ₁Connect the self-checking circuit of being formed; By a controllable silicon D ₁₃Negative pole end and bridge rectifier D ₁-D ₄Output one end join, control the utmost point be connected to resistance R ₄Back and bridge rectifier D ₁-D ₂Another output join, between the control utmost point and negative pole end capacitor C is set ₆, light-emitting diode D ₁₂With shunt resistance R ₈Receive controllable silicon D after the parallel connection ₁₃Positive terminal on the multi-functional power protector that control circuit constituted formed, it is characterized in that: a bridge rectifier D by the power supply power supply ₈-D ₁₁Input on, be connected in series a relay J ₁, relay J ₁Normally closed some K _J1Insert on the power supply bridge rectifier D ₈-D ₁₁Output one terminate at controllable silicon D ₁₃Negative pole end on, other end serial connection current-limiting resistance R ₇Back and light-emitting diode D ₁₂With shunt resistance R ₈Tie point join; By resistance R ₅, piezo-resistance R ₆The sample resistance that is concatenated into is connected across bridge rectifier D ₈-D ₁₁The output two ends on, at controllable silicon D ₁₃The control utmost point and sample resistance R ₅, R ₆Point of contact between be connected in series isolating diode D successively ₅, voltage stabilizing didoe D ₆, bidirectional diode D ₇, at controllable silicon D ₁₃Negative pole end and voltage stabilizing didoe D ₆With double direction diode D ₇Tie point between cross-over connection one anti-interference capacitor C ₇Serial connection overload relay J on power supply ₂, overload relay J ₂Normal battle of K _J2One terminates at current-limiting resistance R ₇On the end, the other end with by time delay resistance R ₉, bidirectional diode D ₁₄, isolating diode D ₁₅Be in series the back, receive resistance R ₄Input on, and at time delay resistance R ₉With controllable silicon D ₁₃Negative pole end between delay capacitor C is set ₈In bridge rectifier D ₁-D ₄Output two ends span was connected K switch ₂The discharge resistance R of control ₃With discharge capacity C ₅

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