CN102749579A

CN102749579A - Improved detection device

Info

Publication number: CN102749579A
Application number: CN2012102624886A
Authority: CN
Inventors: 胡小青
Original assignee: Suzhou Beitente Electronic Technology Co Ltd
Current assignee: State Grid Shandong Electric Power Co Laixi Power Supply Co
Priority date: 2012-07-27
Filing date: 2012-07-27
Publication date: 2012-10-24
Anticipated expiration: 2032-07-27
Also published as: CN105699887B; CN105699886A; CN105699885A; CN105606995A; CN102749579B; CN105699887A; CN105572579A; CN105572578A

Abstract

The invention relates to an improved detection device which comprises an alternating-current power circuit, a phase generation circuit, an alternating-current electric leakage adjusting circuit and a time detection circuit. The phase generation circuit comprises a direct current generation circuit composed of a resistor R67, a 9V dry battery Bt, a button switch SB5 and a button switch SB6. One end of the resistor R67 is connected with the positive pole of a 9V dry battery U, and the other end of the resistor R67 is connected with an intermediate contact of the button switch SB5. A normally-opened contact of the button switch SB5 is connected with a normally-opened contact and a normally-closed contact of the button switch SB6, the negative pole of the 9V dry battery is connected with the normally-opened contact and the normally-closed contact of the button switch SB6, an intermediate contact of the button switch SB6 is connected with the positive pole of a direct current output wiring column, and the intermediate contact SB6-21 of the button switch SB6 is connected with the negative pole of direct current output. The improved detection device is reasonable in structure and can meet special requirements of users.

Description

A kind of modified checkout equipment

Technical field

The present invention relates to a kind of modified checkout equipment.

Background technology

According to standard GB 14048.2-2001; GB16916.1-2003; Regulations such as GB16917.1-2003:, can guarantee that the RCCB of threading off at the appointed time is called A type RCCB to no matter being residue pulsating direct current with regulation or the residue simple sinusoidal alternating current that applies suddenly or slowly rise.To no matter being the residue simple sinusoidal alternating current that applies suddenly or slowly rise, can guarantee the RCCB of threading off at the appointed time to be called AC type RCCB with no DC component.By on can know that A type RCCB has covered the function of AC type RCCB.

Above-mentioned " the residue pulsating current of regulation " is following 4 kinds of situation: the half-wave rectified current that half-wave rectified current, the electric current lagging voltage that the half-wave rectified current that the electric current lagging voltage is 0 °, electric current lagging voltage are 90 ° is 135 °, contain the half-wave rectified current of 0 ° of the electric current lagging voltage of 6mA direct current.

There is not the device that A type RCCB is measured in the prior art.

Summary of the invention

Technical matters to be solved by this invention provides the wide and comparatively reliable and stable modified checkout equipment of performance of a kind of test specification.

For solving the problems of the technologies described above, the invention provides a kind of modified checkout equipment, comprise AC power circuit, phase generating circuit, ac leakage regulating circuit and time detection circuit; Phase generating circuit comprises the direct current generative circuit; Said direct current generative circuit is made up of resistance R 67,9V dry cell Bt, pushbutton switch SB5, SB6; One end of resistance R 67 links to each other with the positive pole of 9V dry cell U; The other end of resistance R 67 links to each other with the intermediate contact of pushbutton switch SB5; The normally opened contact of pushbutton switch SB5 links to each other with normally opened contact, the normally closed contact of pushbutton switch SB6; Normally opened contact, normally opened contact that the 9V dry battery cathode meets pushbutton switch SB6 link to each other, and the intermediate contact of pushbutton switch SB6 links to each other with direct current output wiring terminal "+", and the intermediate contact SB6-21 of pushbutton switch SB6 links to each other with direct current output "-".

The present invention has positive effect: (1) the present invention makes its structure comparatively reasonable through improving the direct current generative circuit, can effectively satisfy the testing requirement of special RCCB.

Description of drawings

To combine accompanying drawing that the present invention is done further explanation below, wherein accompanying drawing is following:

Fig. 1 is the contour structures synoptic diagram of the modified checkout equipment of embodiment 1;

Fig. 2 is the part electrical schematic diagram of the modified checkout equipment of embodiment 1;

Fig. 3 is another part electrical schematic diagram of the modified checkout equipment of embodiment 1.

Embodiment

(embodiment 1)

See Fig. 1-3; Present embodiment is a kind of modified checkout equipment that is used to test RCCB, comprising: AC power circuit 1, DC power-supply circuit 7, phase generating circuit 2, ac leakage regulating circuit 3, phase place display circuit 6, indicator light circuit 5 and time detection circuit 4.

AC power circuit 1 has the first live wire end and the second live wire end that is used to constitute the simulation loop of electric leakage that is used to constitute load circuit; The first live wire end is used for linking to each other with the live wire input end of equipment under test 9 with the second live wire end, and the zero line side of said load circuit is used for linking to each other with the zero line side of equipment under test 9.Equipment under test 9 is A type RCCBs in the present embodiment.

Phase generating circuit 2 is used for linking to each other with the live wire output terminal L2 of equipment under test 9; Phase generating circuit 2 comprises the control knob circuit, the control knob circuit be used for control phase produce circuit 2 generate respectively at said simulation loop of electric leakage 0 ° of electric current lagging voltage 90 ° of half-wave rectified current, electric current lagging voltages 135 ° of half-wave rectified current, electric current lagging voltages half-wave rectified current and contain the half-wave rectified current of 0 ° of the electric current lagging voltage of 6mA direct current.

Ac leakage regulating circuit 3 is used to control the size of current of said simulation loop of electric leakage; Time detection circuit 4 is used to measure from said simulation loop of electric leakage conducting to A type RCCB threads off required time, i.e. actuation time.

Said phase generating circuit 2 comprises: first half-wave rectifying circuit that the electric current lagging voltage is 0 °; Second half-wave rectifying circuit that the electric current lagging voltage is 90 °; The 3rd half-wave rectifying circuit that the electric current lagging voltage is 135 °; 6mA direct current generative circuit; And be used for according to said first half-wave rectifying circuit; The control signal of second half-wave rectifying circuit and the output of the 3rd half-wave rectifying circuit generates the half-wave rectified current of 0 ° of electric current lagging voltage respectively in said simulation loop of electric leakage; The half-wave rectified current that the electric current lagging voltage is 90 °; The controllable silicon current control circuit of the half-wave rectified current that the electric current lagging voltage is 135 ° and the half-wave rectified current of 0 ° of the electric current lagging voltage that contains the 6mA direct current.

The 3rd half-wave rectifying circuit that said electric current lagging voltage is 135 ° comprises: become circuit by transformer T2, diode D5, resistance R 3, R4, R5, R6, R7 and the sine wave shaped that operational amplifier IC1A constitutes; The charging circuit that constitutes by resistance R 8, capacitor C 5 that links to each other with the output terminal of operational amplifier IC1A, constitute by diode D6, D7 with door; Be used for setting resistance R 9 and R10 with respect to the voltage of adjusting of 135 ° of electric current lagging voltages; Be used for regulating the resistance R 11 and potentiometer WR1 with respect to the comparative voltage of 135 ° of electric current lagging voltages of the backward end of operational amplifier IC1B, the output terminal of operational amplifier IC1B is used for the control signal of 135 ° of output current lagging voltages.

Resistance R 12 is current-limiting resistances of triode BG3 base stage; Triode BG3 and resistance R 13 constitute emitter follower; The control signal that electric current lagging voltage on the resistance R 13 is 135 ° is given triode BG18 through pushbutton switch SB1, resistance R 58; Triode BG18 drives opto-coupler chip IC4, and resistance R 59 is current-limiting resistances, guarantees that opto-coupler chip IC4 effectively works.Opto-coupler chip IC4 is in order to isolate alternating current 220V and phase generating circuit direct current component; Conducting and the shutoff of control bidirectional triode thyristor BG19; Resistance R 60, R61 are used to control the G utmost point input current of bidirectional triode thyristor BG19, make input signal enough trigger bidirectional triode thyristor BG19 conducting.The A of bidirectional triode thyristor BG19, K two utmost points are connected between load and the AC power, and the electric current that flows through load is exactly the half-wave rectified current that lags behind 135 ° of voltages.Control bidirectional triode thyristor BG19 gets final product the residue pulsating current through stipulating in the operation circuit, and regulator potentiometer WR3, WR4, WR5 are the may command leakage current.

When pushbutton switch SB10 was closed, two intermediate contacts of pushbutton switch SB10 were used for the detection of phase generating circuit output waveform.

Said controllable silicon current control circuit comprises: according to the control signal of said first half-wave rectifying circuit, second half-wave rectifying circuit and the output of the 3rd half-wave rectifying circuit and the triode BG18 of conducting, the opto-coupler chip IC4 that driven by triode BG18; By the bidirectional triode thyristor BG19 of opto-coupler chip IC4 control break-make, the A of bidirectional triode thyristor BG19, the K utmost point are connected in the said simulation loop of electric leakage.

Said time detection circuit 4 comprises: single-chip microcomputer IC6, being used to of linking to each other with the detection of electrical leakage end of single-chip microcomputer IC6 are detected said simulation the loop of electric leakage whether leakaging signal detecting circuit of conducting and the charactron that is used to show the time that links to each other with the temporal information output terminal of single-chip microcomputer IC6; Single-chip microcomputer IC6 threads off the required time according to the electric leakage signal measurement of leakaging signal detecting circuit output from said simulation loop of electric leakage conducting to A type RCCB also should the time through said charactron demonstration.

Said phase generating circuit 2 be connected be used to show said simulation loop of electric leakage exist 0 ° of electric current lagging voltage 90 ° of half-wave rectified current or electric current lagging voltages 135 ° of half-wave rectified current or electric current lagging voltages half-wave rectified current or contain the phase place display circuit 6 of half-wave rectified current of 0 ° of the electric current lagging voltage of 6mA direct current.

AC power circuit is given transformer T4 by 220V 50Hz ac power supply, and

transformer T4 output

180V, 220V, 250V, 380V voltage are connected to through waver SA1 and exchange output wiring terminal L1, N is last.Through regulating the gear of waver SA1, can change the voltage that exchanges output wiring terminal L1 and N two ends.The load of transformer T4 is an ac leakage regulating circuit 3.

Ac leakage regulating circuit 3 is by transformer T4 output 26V alternating current; Be connected to after its output terminal one end and the waver SA2 series connection and exchange output wiring terminal L1; After the other end and reometer, electric leakage are regulated resistance, bidirectional triode thyristor BG19, waver SA3 and connect, be connected to interchange output wiring terminal L2.

Phase place display circuit 6 is made up of logical circuit, pushbutton switch that charactron LED1-LED4, diode D11-36, triode BG7-16 form.

When pressing the button switch S B4, current signal trigger triode BG20 conducting, triode BG20 output signal triggering triode BG7, BG8 conducting, charactron LED1 shows " A ", charactron LED2 shows " C ".When pressing the button switch S B3, charactron LED1, LED4 show " A0 "; Press the button switch S B2, charactron LED1, LED3, LED4 show " A90 "; Press the button switch S B5, charactron LED1, LED2, LED3, LED4 show " A0-6 ".

Indicator light circuit 5 is made up of transformer T4, commutation diode D42-45, three terminal regulator BG27, RC filtering circuit.DC power-supply circuit 7 comprises: by the 5V DC power-supply circuit of transformer T1 power supply, by 5V DC power-supply circuit, 12V DC power-supply circuit, the 6mA direct current generative circuit of transformer T3 power supply.

Time detection circuit 4 is made up of pushbutton switch, commutation diode D46-49, triode BG23-26, resistance, capacitor C 15, photoelectrical coupler IC5, single-chip microcomputer IC6, charactron LED11 etc.

6mA direct current generative circuit is made up of resistance R 67,9V dry cell Bt, pushbutton switch SB5, SB6.One end of resistance R 67 links to each other with the positive pole of 9V dry cell U; The other end of resistance R 67 links to each other with the intermediate contact of pushbutton switch SB5; The normally opened contact of pushbutton switch SB5 links to each other with normally opened contact, the normally closed contact of pushbutton switch SB6; Normally opened contact, normally opened contact that the 9V dry battery cathode meets pushbutton switch SB6 link to each other, and the intermediate contact of pushbutton switch SB6 links to each other with direct current output wiring terminal "+", and the intermediate contact SB6-21 of pushbutton switch SB6 links to each other with direct current output "-".

Second half-wave rectifying circuit that the electric current lagging voltage is 90 ° is by resistance R 17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R57, R58, R59, R60, R61; Capacitor C 6, diode D8, D9, D10, triode BG5, BG18; Bidirectional triode thyristor BG19; Operational amplifier IC2, opto-coupler chip IC4, potentiometer WR2 constitutes.

First half-wave rectifying circuit that the electric current lagging voltage is 0 ° is by resistance R 50, R51, R52, R53, R54, R55, R56, R57, R58, R59, R60, R61; Diode D37, triode BG17, BG18, bidirectional triode thyristor BG19; Operational amplifier IC3, opto-coupler chip IC4 constitutes.The e of triode BG22 in the positive terminal of diode D51 and the phase place display circuit extremely links to each other; The negative pole end of diode D51 links to each other with an end of resistance R 75; The other end of resistance R 75 extremely links to each other with the b of triode BG28; 2 pin of opto-coupler chip IC7 extremely link to each other with the c of triode BG28, and the e utmost point of triode BG28 links to each other with 2 pin of stabilivolt BG21.One end of resistance R 74 links to each other with 3 pin of stabilivolt BG21, and 4,6 pin of opto-coupler chip IC7 link to each other with pushbutton switch SB3 intermediate contact SB3-21, normally opened contact SB3-22 respectively.Because of the half-wave rectified current that contains the 6mA direct current of 0 ° of electric current lagging voltage is arranged in " the residue pulsating current of regulation ",, guarantee the output of the half-wave rectified current of 0 ° of electric current lagging voltage so this part is under the situation that is implemented in " A0-6 ".

Resistance R 73, R77 are the current-limiting resistance of opto-coupler chip IC5; Resistance R 78 is the current-limiting resistance of 1 pin of single-chip microcomputer IC6; Capacitor C 15, resistance R 79 are formed differentiating circuit; Resistance R 80, R81, R82, R83, R84, R85, R86, R87 are the current-limiting resistance of each pin of charactron LED11, and resistance R 88, R89, R90, R91 are the current-limiting resistance of the b utmost point of triode BG23, BG24, BG25, B626.Pushbutton switch SB17 is a testing button, and pushbutton switch SB18 is a SR.

When pushbutton switch SB17 is closed, breaker electrifying, DC current forms a spike pulse through differentiating circuit, 1 pin of input single-chip microcomputer IC6, single-chip microcomputer IC6 picks up counting.When circuit breaker trip, opto-coupler chip IC5 dead electricity, 4,6 pin turn-off, and 3 pin of single-chip microcomputer IC6 have the high level input, and single-chip microcomputer IC6 stops timing and output data shows to charactron LED11.When pushbutton switch SB18 presses, single-chip microcomputer IC6, charactron LED11 zero clearing.

The foregoing description only be for clearly the present invention is described and is done for example, and be not to be qualification to embodiment of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.

Claims

1. a modified checkout equipment comprises AC power circuit (1), phase generating circuit (2), ac leakage regulating circuit (3) and time detection circuit (4); It is characterized in that: phase generating circuit (2) comprises the direct current generative circuit; Said direct current generative circuit is made up of resistance R 67,9V dry cell Bt, pushbutton switch SB5, SB6; One end of resistance R 67 links to each other with the positive pole of 9V dry cell U; The other end of resistance R 67 links to each other with the intermediate contact of pushbutton switch SB5; The normally opened contact of pushbutton switch SB5 links to each other with normally opened contact, the normally closed contact of pushbutton switch SB6; Normally opened contact, normally opened contact that the 9V dry battery cathode meets pushbutton switch SB6 link to each other, and the intermediate contact of pushbutton switch SB6 links to each other with direct current output wiring terminal "+", and the intermediate contact SB6-21 of pushbutton switch SB6 links to each other with direct current output "-".