CN2403118Y - Three-phase undervoltage phase interruption strip controller - Google Patents

Abstract

The utility model relates to a three-phase under-voltage phase interruption disengaging controller, which is a matching apparatus to an electricity distribution three-phase circuit breaker in the electric power system. The utility model is composed of a three-phase rectification circuit, a first-stage gate circuit, a second-stage gate circuit, a third-stage gate circuit and a disengaging protection circuit. The three-phase rectification circuit is connected with a three-phase network; the first-stage gate circuit is connected with the three-phase rectification circuit; the second-stage gate circuit is connected with the three-phase rectification circuit, the first-stage gate circuit, and the disengaging protection circuit; the third-stage gate circuit is connected with the three-phase rectification circuit, the first-stage gate circuit, and the disengaging protection circuit. The utility model uses the gate circuit to carry out rectification to the three-phase voltage simultaneously, thus, the power consumption is reduced, the performance is stable, and the products can be made into a small size, and the three-phase under-voltage phase interruption disengaging controller can match with the three-phase circuit breaker.

Description

Three-phase is under-voltage, phase failure tripping controller

The utility model relates to the tripping controller of the under-voltage or phase failure of three-phase.Be the corollary apparatus of electric power system for the distribution three-phase breaker.

The present three-phase that uses is under-voltage, phase failure tripping controller is converted into little ac voltage signal by voltage transformer with big ac voltage signal mostly, is converted into direct current signal by rectification circuit then and handles, and exports under-voltage or phase failure signal.Owing to used voltage transformer, make the controller power consumption big, performance is stable inadequately, and the controller volume ratio is bigger, can't be supporting with three-phase breaker.

The purpose of this utility model provides that a kind of three-phase is under-voltage, phase failure tripping controller, and its power consumption is little, and stable performance and volume are little.

The utility model is achieved like this: a kind of three-phase is under-voltage, phase failure tripping controller; form by rectified three-phase circuit, first order gate circuit, second level gate circuit, third level gate circuit and dropout protective circuit; rectified three-phase circuit is connected with three phase network; first order gate circuit is connected with rectified three-phase circuit; second level gate circuit is connected with rectified three-phase circuit, first order gate circuit and dropout protective circuit, and third level gate circuit is connected with rectified three-phase circuit, first order gate circuit and dropout protective circuit.

The utility model carries out rectification to three-phase voltage simultaneously owing to adopt gate circuit, has reduced power consumption, stable performance, and product also can do for a short time, and can be supporting with three-phase breaker.

Below in conjunction with accompanying drawing the utility model is further described below.

Accompanying drawing is the utility model electrical schematic diagram.

The line voltage U of the utility model three-phase alternating voltage _ABBy diode D ₁～D ₄Carry out halfwave rectifier, the line voltage U _ACBy diode D ₁, D ₂, D ₇, D ₈Carry out halfwave rectifier, the line voltage U _BCBy diode D ₅, D ₆, D ₇, D ₈Carry out halfwave rectifier.

First order gate circuit is by resistance R ₁, R ₂, R ₄, R ₅, capacitor C ₁, diode D ₉, voltage-stabiliser tube D ₁₀, D ₁₁With PMOS pipe T ₁, T ₄Form resistance R ₁, R ₂Be serially connected between the half-wave rectifying circuit diode D ₉Negative pole and resistance R ₁, R ₂Contact links to each other, positive pole and capacitor C ₁And resistance R ₄An end, voltage-stabiliser tube D ₁₀, D ₁₁Positive pole link to each other capacitor C ₁The other end and resistance R ₁, R ₄The other end, voltage-stabiliser tube D ₁₀Negative pole, PMOS manage T ₁, T ₄The T of series connection ₁S extremely continuous, voltage-stabiliser tube D ₁₁Negative pole and PMOS pipe T ₁, T ₄G extremely continuous, resistance R ₅Be connected across the T of series connection ₁, T ₄The S utmost point and D interpolar.Through diode D ₁～D ₄Line voltage U to three-phase alternating voltage _ABAfter the halfwave rectifier, the direct voltage that obtains is supplied with the work of first order gate circuit.Resistance R ₁, R ₂Form bleeder circuit, when falling in resistance R ₁This voltage passes through by diode D when going up greater than certain value ₉, capacitor C ₁, voltage-stabiliser tube D ₁₀, D ₁₁, resistance R ₄, R ₅Behind the door circuit of forming, obtain one and can open PMOS pipe T ₁, T ₄Voltage, T ₁, T ₄Conducting, the work of first order gate circuit.Otherwise work as resistance R ₁On pressure drop less than a certain value, line voltage U just _ABDuring less than a certain value, T ₁, T ₄S, G voltage across poles manage cut-in voltage less than PMOS, T ₁, T ₄Turn-off T ₁, T ₄It is because single tube is withstand voltage not enough that series connection is used.

Second level gate circuit is by resistance R ₉～R ₁₂, capacitor C ₃, diode D ₁₄, voltage-stabiliser tube D ₁₅, D ₁₆With NMOS pipe T ₂Form resistance R ₉, R ₁₀Be serially connected between the half-wave rectifying circuit resistance R ₉One end and PMOS pipe T ₄D extremely continuous, diode D ₁₄Positive pole and resistance R ₉, R ₁₀Contact links to each other, negative pole and capacitor C ₃And resistance R ₁₁An end, voltage-stabiliser tube D ₁₅, D ₁₆Negative pole link to each other resistance R ₁₀With capacitor C ₃, resistance R ₁₁The other end, voltage-stabiliser tube D ₁₅Positive pole and resistance R ₁₂An end link to each other voltage-stabiliser tube D ₁₆Anodal, resistance R ₁₂The other end and NMOS pipe T ₂G is extremely continuous.Through diode D ₁, D ₂, D ₇, D ₈Line voltage U to three-phase alternating voltage _ACAfter the halfwave rectifier, the direct voltage that obtains is supplied with second level gate circuit work.Resistance R ₉, R ₁₀Form bleeder circuit, when falling in resistance R ₁₀Last voltage is during greater than certain value, and this voltage is by by diode D ₁₄, capacitor C ₃, voltage-stabiliser tube D ₁₅, D ₁₆, resistance R ₁₁, R ₁₂Behind the door circuit of forming, obtain one and can open NMOS pipe T ₂Voltage, T ₂Conducting, the work of second level gate circuit, otherwise, work as resistance R ₁₀On pressure drop less than a certain value, line voltage U just _ACDuring less than a certain value, T ₂S, G voltage across poles less than T ₂Cut-in voltage, T ₂Turn-off.

Third level gate circuit is by resistance R ₁₇～R ₂₀, capacitor C ₅, diode D ₁₈, voltage-stabiliser tube D ₁₉, D ₂₀With NMOS pipe T ₃Form resistance R ₁₇, R ₁₈Be serially connected between the half-wave rectifying circuit diode D ₁₈Positive pole and resistance R ₁₇, R ₁₈Contact link to each other negative pole and capacitor C ₅, resistance R ₁₉One end, voltage-stabiliser tube D ₁₉, D ₂₀Negative pole link to each other resistance R ₁₈With capacitor C ₅, resistance R ₁₉The other end, voltage-stabiliser tube D ₁₉Anodal, resistance R ₂₀One end, NMOS manage T ₃The S utmost point and the R of second level gate circuit ₁₀Link to each other voltage-stabiliser tube D ₂₀Positive pole and resistance R ₂₀The other end, T ₃G extremely continuous, T ₃The D utmost point and the T of second level gate circuit ₂S extremely continuous.Through diode D ₅～D ₆Line voltage U to three-phase alternating voltage _BCAfter the halfwave rectifier, the direct voltage that obtains is supplied with the work of third level gate circuit.Resistance R ₁₇, R ₁₈Form bleeder circuit, when falling in resistance R ₁₈On voltage during greater than certain value, this voltage is by by diode D ₁₈, capacitor C ₅, voltage-stabiliser tube D ₁₉, D ₂₀, resistance R ₁₉, R ₂₀Behind the door circuit of forming, obtain one and can open NMOS pipe T ₃Voltage, T ₃Conducting, the work of third level gate circuit, otherwise, work as resistance R ₁₈On pressure drop during less than a certain value, line voltage U just _BCDuring less than a certain value, T ₃S, G voltage across poles less than T ₃Cut-in voltage, T ₃Turn-off.

The dropout protective circuit is by resistance R ₃, R ₁₅, R ₁₆Diode D ₁₃, D ₁₇, capacitor C ₄Form resistance R ₃Be connected across the PMOS pipe T of series connection ₁, T ₄The S utmost point and D interpolar, resistance R ₃Link to each other D with diode D13 is anodal ₁₃Negative pole and parallel resistor R ₁₅, R ₁₆Link to each other parallel resistor R ₁₅, R ₁₆With capacitor C ₄, diode D ₁₇Negative pole links to each other, capacitor C ₄, diode D ₁₇Anodal and NMOS manages T ₂D extremely continuous.Resistance R ₃Be in order to manage T at PMOS ₁, T ₄During shutoff, R ₃On voltage be T ₁, T ₄On voltage, suitably select resistance R ₃Can make T ₁, T ₄On voltage less than T ₁, T ₄Withstand voltage, so resistance R ₃Effect be protection PMOS pipe T ₁, T ₄Diode D ₁₃, resistance R ₁₅, R ₁₆Effect be that the electric current of tripping coil is flow through in restriction.C ₄Be filter capacitor, pass through diode D during the tripping coil dead electricity ₁₇Discharge.R ₀₁, R ₀₂Be piezo-resistance, prevent the high pressure wiring board of breaking.

The utility model input is a three-phase alternating voltage, and output connects the tripping coil of circuit breaker.The key element that tripping coil gets electric adhesive is NMOS pipe T ₂, T ₃Conducting simultaneously, and T ₂Conducting must PMOS pipe T ₁, T ₄Conducting and line voltage U _ACGreater than a certain value, T ₁, T ₄The condition of conducting is the line voltage U _ABGreater than a certain value, T ₃The condition of conducting is the line voltage U _BCGreater than a certain value, therefore, when the three-phase voltage of three-phase alternating current just often, but tripping coil gets electric adhesive; When certain occurred the under voltage (less than a certain magnitude of voltage) or the phase failure mutually in the three-phase alternating current, tripping coil unclamped because of dead electricity, thereby had played under-voltage, open phase protection purpose.

Claims (4)

1, under-voltage, the phase failure tripping controller of a kind of three-phase; it is characterized in that forming by rectified three-phase circuit, first order gate circuit, second level gate circuit, third level gate circuit and dropout protective circuit; rectified three-phase circuit is connected with three phase network; first order gate circuit is connected with rectified three-phase circuit; second level gate circuit is connected with rectified three-phase circuit, first order gate circuit and dropout protective circuit, and third level gate circuit is connected with rectified three-phase circuit, first order gate circuit and dropout protective circuit.

2, under-voltage, the phase failure tripping controller of three-phase according to claim 1 is characterized in that first order gate circuit is by resistance R ₁, R ₂, R ₄, R ₅, capacitor C ₁, diode D ₉, voltage-stabiliser tube D ₁₀, D ₁₁With PMOS pipe T ₁, T ₄Form resistance R ₁, R ₂Be serially connected between the half-wave rectifying circuit diode D ₉Negative pole and resistance R ₁, R ₂Contact links to each other, positive pole and capacitor C ₁And resistance R ₄An end, voltage-stabiliser tube D ₁₀, D ₁₁Positive pole link to each other capacitor C ₁The other end and resistance R ₁, R ₄The other end, voltage-stabiliser tube D ₁₀Negative pole, PMOS manage T ₁, T ₄The T of series connection ₁S extremely continuous, voltage-stabiliser tube D ₁₁Negative pole and PMOS pipe T ₁, T ₄G extremely continuous, resistance R ₅Be connected across the T of series connection ₁, T ₄The S utmost point and D interpolar.

3, under-voltage, the phase failure tripping controller of three-phase according to claim 1 is characterized in that second level gate circuit is by resistance R ₉～R ₁₂, capacitor C ₃, diode D ₁₄, voltage-stabiliser tube D ₁₅, D ₁₆With NMOS pipe T ₂Form resistance R ₉, R ₁₀Be serially connected between the half-wave rectifying circuit resistance R ₉One end and PMOS pipe T ₄D extremely continuous, diode D ₁₄Positive pole and resistance R ₉, R ₁₀Contact links to each other, negative pole and capacitor C ₃And resistance R ₁₁An end, voltage-stabiliser tube D ₁₅, D ₁₆Negative pole link to each other resistance R ₁₀With capacitor C ₃, resistance R ₁₁The other end, voltage-stabiliser tube D ₁₅Positive pole and resistance R ₁₂An end link to each other voltage-stabiliser tube D ₁₆Anodal, resistance R ₁₂The other end and NMOS pipe T ₂G is extremely continuous.

4, under-voltage, the phase failure tripping controller of three-phase according to claim 1 is characterized in that third level gate circuit is by resistance R ₁₇～R ₂₀, capacitor C ₅, diode D ₁₆, voltage-stabiliser tube D ₁₉, D ₂₀With NMOS pipe T ₃Form resistance R ₁₇, R ₁₈Be serially connected between the half-wave rectifying circuit diode D ₁₈Positive pole and resistance R ₁₇, R ₁₈Contact link to each other negative pole and capacitor C ₅, resistance R ₁₉One end, voltage-stabiliser tube D ₁₉, D ₂₀Negative pole link to each other resistance R ₁₈With capacitor C ₅, resistance R ₁₉The other end, voltage-stabiliser tube D ₁₉Anodal, resistance R ₂₀One end, NMOS manage T ₃The S utmost point and the R of second level gate circuit ₁₀Link to each other voltage-stabiliser tube D ₂₀Positive pole and resistance R ₂₀The other end, T ₃G extremely continuous, T ₃The D utmost point and the T of second level gate circuit ₂S extremely continuous.

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