CN2058281U

CN2058281U - Multi-function electronic security device

Info

Publication number: CN2058281U
Application number: CN 89203028
Authority: CN
Inventors: 章道质; 王怀胜
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-03-16
Filing date: 1989-03-16
Publication date: 1990-06-13

Abstract

The utility model discloses a contactless multi-function electronic security device for rating power supply, which has functions of anti-electric leakage, anti-electric shock, voltage overload protection and over-current protection. The contactless multi-function electronic security device is provided with a power supply circuit, a voltage sampling circuit, a current sampling circuit, a leakage checking sampling circuit, a temperature compensation circuit, a comparator, an anti-phase trigger circuit with a timing circuit and an executive circuit. The utility model adopts a large-power driving switch and a bidirectional thyristor to control the switching of the contactless multi-function electronic security device to completely realize the contactless control. The contactless multi-function electronic security device has the advantages of multi-function, low power consumption, high reliability and safe utilization.

Description

Multi-function electronic security device

The utility model provides a kind of multifunction electronic protector, is a kind of protective device that is used for the quota power supply.

Along with development and national economy, the raising of living standards of the people, the use amount of household electrical appliance increases day by day, and the destruction and the human casualty accident of electrical equipment increase thereupon.Therefore, the quota electric supply installation of many protection against electric shocks, electric leakage, overvoltage protection, overcurrent protection has occurred.But the protective device of most of quotas power supply all is to adopt relay as the control element that is switched on or switched off circuit, and their ubiquities that power consumption is big, the life-span is low, unsafe shortcoming.Some contactless electron protectors have also appearred in succession for addressing this problem.As the application number of Nanjing Science ﹠ Engineering Univ be 86204883 " the contactless power device of rationing the power supply that automatically resets " it control the through and off of user's electricity consumption with silicon controlled conducting and blocking-up at the bidirectional triode thyristor of having connected between electrical network phase line and user's power supply.But the conducting of bidirectional triode thyristor and blocking-up still will be controlled the contactless control of not basic realization by the adhesive of control relay with release.Simultaneously, owing to do not contain timing circuit on the control circuit, though can automatic disconnection when the user is transshipped, automatically reset very soon, because the frequent damage that also still can cause electrical equipment that resets.

The utility model has designed and has a kind ofly adopted high-power driving switch integrated circuit and bidirectional triode thyristor to make control element, is used for the multifunction electronic protector of quota power supply, and it has functions such as anticreep, electric shock, voltage overload protection, overcurrent protection concurrently.And realized contactless control fully.

The multifunction electronic protector of the utility model design, its electronic circuit is made up of power circuit, voltage sampling, current sampling, leak detection sample circuit, also is provided with by voltage stabilizing didoe CW on its circuit ₂, CW ₃, resistance R ₁₉, R ₂, R ₃The temperature-compensation circuit of forming; By integrated operational amplifier IC ₁And the capacitor C of cross-over connection between anti-phase input and output ₃, the comparator formed; By high-power driving switch I C ₃, resistance R ₈, R ₉, R ₁₈, R ₁₂, R ₇, capacitor C ₅, C ₆, transistor BG ₃, diode D ₄, CW ₅With timing ic IC ₂The anti-phase circuits for triggering of forming that contain timing circuit; By high-power driving switch I C ₄, bidirectional triode thyristor 3CTS, resistance R ₁₃, R ₁₄, R ₁₆, R ₁₇, diode D ₆The executive circuit of forming, the in-phase input end of comparator and the CW in the temperature-compensation circuit ₃With R ₃Join, its inverting input passes through resistance R ₁₉With CW ₂And R ₂Join.The output of comparator passes through resistance R ₄With the transistor BG in the anti-phase circuits for triggering ₃Base stage join substitutional resistance R ₈, R ₉With capacitor C ₆Be serially connected with BG ₃Collector electrode on, high-power driving switch I C ₃Control pin 5 be connected to R ₈, R ₉Between, its output and timing ic IC ₂Output 2,6 pin join, 2,6 pin also are connected to resistance R ₇, capacitor C ₅Between, and pass through C ₅Ground connection, the output pin 3 of timing ic is by diode D ₄Join with the comparator inverting input.High-power driving switch integrated circuit IC in the executive circuit ₄Control pin, pass through resistance R ₁₃Join with comparator output terminal, and pass through R ₁₄Ground connection, IC ₄Grounding leg by voltage stabilizing didoe CW ₆Ground connection, resistance R ₁₆, diode D ₆Be serially connected with IC ₄Input, the control utmost point 9 direct ground connection of bidirectional triode thyristor.

This electronic security device is realized its various functions by following principle.When line voltage, electric current are exported just often, line voltage enters two inputs of comparator, comparator IC during normal power supply respectively via temperature-compensation circuit after over commutation, filtering, voltage stabilizing ₁The voltage V of two inputs _2i＜V _3i, comparator IC ₁The output high level is through R ₁₃, R ₁₄Two electric resistance partial pressures and voltage stabilizing didoe CW ₆Effect make high-power driving switch integrated circuit IC ₄Control pin 5 be higher than its grounding leg 4, IC ₄Input, output 1,2 pin conductings, bidirectional triode thyristor 3CTS is in negative sense and triggers state; Reliable conducting, protector normally send to the user.When problem such as overvoltage, overcurrent, electric shock occurring when electrical network, protector can automatic shutdown circuit, stops to power to the user.For example, when line voltage is too high, through the voltage of rectification, filtering, voltage stabilizing, via the CW in the voltage protection circuit ₇, D ₂Enter the inverting input of comparator, at this moment CW ₇, D ₂With R ₅The voltage of joint raises, thereby the voltage of these comparator inverting input 2 pin is raise, at this moment V on the comparator _2i＞V _3i, the comparator output low level.Through R ₁₃, R ₁₄Dividing potential drop and voltage stabilizing didoe CW ₆Effect make high-power driving switch integrated circuit IC ₄Voltage is lower than voltage on the grounding leg 4, IC on the last control pin 5 ₄Turn-off, oppositely the controllable silicon reliable turn-off stops to power to the user.Simultaneously, because comparator IC ₁Output low level makes transistor BG ₃End, its collector potential raises.Like this, be connected to substitutional resistance R ₈, R ₉Between high-power driving switch I C ₃Control pin 5 on voltage be higher than voltage on its grounding leg 4, IC ₃Input, output 1,2 pin conductings, make timing circuit start working, timing ic IC ₂2,6 pin voltages be lower than 2/3 of supply voltage, its pin 3 output high level make the voltage of the inverting input of comparator still be higher than voltage on the in-phase input end, comparator is output low level still.When passing through by R ₇, C ₅After the time of determining finishes, capacitor C ₅After being recharged, timing ic IC ₂2,6 pin voltages raise, its 3 pin output zero level makes the inverting input voltage V of comparator _2iRecovery is lower than in-phase input end voltage V _3i, comparator output high level, as this moment line voltage recovered normally, protector normally send to the user; As recovering normal, voltage protection circuit makes the comparator output low level, and executive circuit quits work, anti-phase circuits for triggering work, timing circuit work, when regularly finishing, trial line charging again, until line voltage recover normal till.When overcurrent, electric shock or single-phase when going into phenomenon such as ground take place, because the work of circuit such as current sampling, leak detection sampling, make the comparator output low level, executive circuit stops to send electricity to the user, and anti-phase circuits for triggering are started working, timing circuit work, regularly finish the back trial line charging, eliminated circuit as fault and normally sent electricity, do not removed, because the work of comparator, executive circuit, anti-phase circuits for triggering as fault, make and continue top action, till eliminating to user's fault.When subscriber line circuit is out of order, be connected to lumination of light emitting diode, warning on timing ic 3 pin.This protector is provided with temperature-compensation circuit, has guaranteed normally sending under the electric situation, and no matter ambient temperature has anything to change, and comparator can both be in reliable conduction status, and protector can operate as normal.

Multifunction electronic protector provided by the utility model has adopted high-power driving switch integrated circuit and bidirectional triode thyristor to make control element, has realized contactless control fully, and its control action is very sensitive.This protector has that function is many, power consumption is low, safe and reliable advantage.

Description of drawings:

1. the utility model circuit block diagram.

2. the utility model circuit theory diagrams.

The enforcement of utility model is very easy, as long as can realize its various functions by the circuit theory diagrams installation.Wherein, IC ₁Be F007B, IC ₂Be NE555, IC ₃, IC ₄Be TWH8778.3CTS adopts 600V, 25A.CW ₂, CW ₃All adopt 2CW54, CW ₄Adopt 2CW139, CW ₃Adopt 2CW51.

Claims

1, a kind of multifunction electronic protector, its electronic circuit is made up of power circuit, voltage sampling, current sampling, leak detection sample circuit, it is characterized in that also being provided with on the circuit:

A, by voltage stabilizing didoe CW ₂, CW ₃, resistance R ₁₉, R ₂, R ₃The temperature-compensation circuit of forming;

B, by integrated operational amplifier IC ₁And the capacitor C of cross-over connection between anti-phase input and output ₃The comparator of forming;

C, by high-power driving switch I C ₃, resistance R ₈, R ₉, R ₁₈, R ₁₂, R ₇, capacitor C ₅, C ₆, transistor BG ₃, diode D ₄, CW ₅With timing ic IC ₂The anti-phase circuits for triggering of forming that contain timing circuit;

D, by high-power driving switch I C ₄, bidirectional triode thyristor 3CTS, resistance R ₁₃, R ₁₄, R ₁₆, R ₁₇, diode D ₆The executive circuit of forming.

2, according to the described multifunction electronic protector of claim 1, it is characterized in that the in-phase input end of said comparator and the CW in the temperature-compensation circuit ₃With R ₃Join, its inverting input passes through resistance R ₁, with CW ₂And R ₂Join.

3, according to the described multifunction electronic protector of claim 1, it is characterized in that the output of comparator passes through resistance R ₁₂With the transistor BG in the anti-phase circuits for triggering ₃Base stage join substitutional resistance R ₈, R ₉With capacitor C ₆Be serially connected with BG ₃Collector electrode on, high-power driving switch I C ₃Control pin 5 be connected to R ₈, R ₉Between, its output and timing ic IC ₂Output 2,6 pin join, 2,6 pin also are connected to resistance R ₇, capacitor C ₅Between, and pass through C ₅Ground connection, the output pin 3 of timing ic is by diode D ₄Join with the comparator inverting input.

4,, it is characterized in that high-power driving switch integrated circuit IC in the said executive circuit according to the described multifunction electronic protector of claim 1 ₄Control pin 5 pass through resistance R ₁₃Join with comparator output terminal, and pass through R ₁₄Ground connection, IC ₄Grounding leg by voltage stabilizing didoe CW ₆Ground connection, resistance R ₁₆, diode D ₆Be serially connected with IC ₄Input, bidirectional triode thyristor and piezo-resistance R ₁₇Be connected to IC ₄Output on, the control utmost point 9 direct ground connection of bidirectional triode thyristor.