CN105606995A

CN105606995A - Improved detection equipment having time detection circuit

Info

Publication number: CN105606995A
Application number: CN201610079065.9A
Authority: CN
Inventors: 胡小青
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-27
Filing date: 2012-07-27
Publication date: 2016-05-25
Also published as: CN105699886A; CN105699887A; CN102749579A; CN105572578A; CN105572579A; CN102749579B; CN105699887B; CN105699885A

Abstract

The invention relates to an improved detection equipment having a time detection circuit. The improved detection equipment having the time detection circuit comprises an AC power source circuit, a phase generation circuit, an AC leakage adjustment circuit and a time detection circuit, wherein the phase generation circuit comprises a DC generation circuit, the DC generation circuit comprises a resistor R67, a 9V dry cell Bt and button switches SB5 and SB6, one end of the resistor R67 is connected with an anode of a 9V dry cell U, the other end of the resistor R67 is connected with a middle contact point of the button switch SB5, a normally-opened contact point of the button switch SB5 is connected with a normally-opened contact point and a normally-closed contact point of the button switch SB6, a cathode of the 9V dry cell is connected with the normally-opened contact point and the normally-opened contact point of the button switch SB6, a middle contact point of the button switch SB6 is connected with a + DC output wiring column, and the middle contact point SB6-21 of the button switch SB6 is connected with a - DC output wiring column. According to the improved detection equipment, the structure is relatively reasonable, and special requirements of users can be satisfied.

Description

There is the modified checkout equipment of time detection circuit

Technical field

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

Background technology

According to standard GB/T 14048.2-2001, GB16916.1-2003, the regulations such as GB16917.1-2003: to being no matter to apply suddenly or the residue pulsating direct current with regulation or the residue simple sinusoidal alternating current of rising, can guarantee that the RCCB of threading off is at the appointed time called A type RCCB. To be no matter apply suddenly or rising there is the residue simple sinusoidal alternating current without DC component, can guarantee the RCCB of threading off to be at the appointed time called AC type RCCB. As from the foregoing, A type RCCB has covered the function of AC type RCCB.

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

In prior art, there is not the device that A type RCCB is measured.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of test specification extensively and the comparatively reliable and stable modified checkout equipment with time detection circuit of performance.

For solving the problems of the technologies described above, the invention provides a kind of modified checkout equipment with time detection circuit, comprise AC power circuit, DC power-supply circuit, phase generating circuit, ac leakage regulating circuit, phase place display circuit, indicator light circuit and time detection circuit, it is characterized in that: AC power circuit has the first live wire end for forming load circuit and for forming the second live wire end of simulation loop of electric leakage, the first live wire end is with the second live wire end for being connected with the live wire input of equipment under test, and the zero line side of described load circuit is for being connected with the zero line side of equipment under test, described equipment under test is A type RCCB, phase generating circuit is for being connected with the live wire output L2 of equipment under test, phase generating circuit comprises control button circuit, and control button circuit produces circuit and generate respectively at described simulation loop of electric leakage the half-wave rectified current of half-wave rectified current, electric current lagging voltage 135o and the half-wave rectified current of the electric current lagging voltage 0o that contains 6mA direct current of half-wave rectified current, the electric current lagging voltage 90o of electric current lagging voltage 0o for control phase, ac leakage regulating circuit is for controlling the size of current of described simulation loop of electric leakage, time detection circuit is threaded off required time, i.e. actuation time for measuring from described simulation loop of electric leakage conducting to A type RCCB, described phase generating circuit comprises: the first half-wave rectifying circuit of electric current lagging voltage 0o, the second half-wave rectifying circuit of electric current lagging voltage 90o, the 3rd half-wave rectifying circuit of electric current lagging voltage 135o, 6mA direct current generative circuit and controllable silicon current control circuit, controllable silicon current control circuit is used for according to described the first half-wave rectifying circuit, the control signal of the second half-wave rectifying circuit and the output of the 3rd half-wave rectifying circuit generates respectively the half-wave rectified current of electric current lagging voltage 0o in described simulation loop of electric leakage, the half-wave rectified current of electric current lagging voltage 90o, the half-wave rectified current of the half-wave rectified current of electric current lagging voltage 135o and the electric current lagging voltage 0o that contains 6mA direct current, the 3rd half-wave rectifying circuit of described electric current lagging voltage 135o comprises: become circuit by transformer T2, diode D5, resistance R 3, R4, R5, R6, R7 and the sine wave shaped that operational amplifier IC1A forms, the charging circuit being formed by resistance R 8, capacitor C 5 being connected with the output of operational amplifier IC1A, formed by diode D6, D7 with door, be used for setting resistance R 9 and the R10 with respect to the voltage of adjusting of electric current lagging voltage 135o, resistance R 11 and the potentiometer WR1 of the comparative voltage with respect to electric current lagging voltage 135o of the backward end that is used for regulating operational amplifier IC1B, the output of operational amplifier IC1B is for the control signal of output current lagging voltage 135o, resistance R 12 is current-limiting resistances of triode BG3 base stage, triode BG3 and resistance R 13 form emitter follower, the control signal of electric current lagging voltage 135o in resistance R 13 is given triode BG18 by press button SB1, resistance R 58, triode BG18 drives opto-coupler chip IC4, resistance R 59 is current-limiting resistances, ensures 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, control the turn-on and turn-off of bidirectional triode thyristor BG19, resistance R 60, R61, for controlling the G utmost point input current of bidirectional triode thyristor BG19, make input signal enough trigger bidirectional triode thyristor BG19 conducting, A, K bis-utmost points of bidirectional triode thyristor BG19 are connected between load and AC power, and the electric current that flows through load is exactly the half-wave rectified current that lags behind voltage 135o, control bidirectional triode thyristor BG19 and get final product the residue pulsating current that passes through regulation in control circuit, regulator potentiometer WR3, WR4, WR5 can control leakage current, in the time that press button SB10 is closed, two intermediate contacts of press button SB10 are for the detection of phase generating circuit output waveform, described controllable silicon current control circuit comprises: according to the control signal of described the first half-wave rectifying circuit, the 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 being driven by triode BG18, the bidirectional triode thyristor BG19 that is controlled break-make by opto-coupler chip IC4, the A of bidirectional triode thyristor BG19, the K utmost point are connected in described simulation loop of electric leakage, described time detection circuit comprises: single-chip microcomputer IC6, be connected with the detection of electrical leakage end of single-chip microcomputer IC6 for detection of the whether leakaging signal detecting circuit of conducting and the charactron for displaying time being connected with the temporal information output of single-chip microcomputer IC6 of described simulation loop of electric leakage, single-chip microcomputer IC6 measures from described simulation loop of electric leakage conducting to A type RCCB and threads off required time show this time by described charactron according to the electric leakage signal of leakaging signal detecting circuit output, described 6mA direct current generative circuit is made up of resistance R 67,9V dry cell Bt, press button SB5, SB6, one end of resistance R 67 is connected with the positive pole of 9V dry cell U, the other end of resistance R 67 is connected with the intermediate contact of press button SB5, the normally opened contact of press button SB5 is connected with normally opened contact, the normally-closed contact of press button SB6,9V dry battery cathode connects the normally opened contact of press button SB6, the intermediate contact of press button SB6 is connected with direct current output wiring terminal "+", and the intermediate contact SB6-21 of press button SB6 is connected with direct current output "-",

In the time pressing the button switch S B4, current signal trigger triode BG20 conducting, triode BG20 output signal trigger triode BG7, BG8 conducting, charactron LED1 shows " A ", charactron LED2 shows " C "; While 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 ".

The present invention has positive effect: the present invention, by improving direct current generative circuit, makes its structure comparatively reasonable, can effectively meet the testing requirement of special RCCB.

Brief description of the drawings

Below in conjunction with accompanying drawing, the present invention is further explained, wherein accompanying drawing is as follows:

Fig. 1 is the contour structures schematic 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.

Detailed description of the invention

(embodiment 1)

See Fig. 1-3, the present embodiment is a kind of for testing the modified checkout equipment of 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 for forming load circuit and for forming the second live wire end of simulation loop of electric leakage, the first live wire end is with the second live wire end for being connected with the live wire input of equipment under test 9, and the zero line side of described load circuit is for being connected with the zero line side of equipment under test 9. In the present embodiment, equipment under test 9 is A type RCCBs.

Phase generating circuit 2 is for being connected with the live wire output L2 of equipment under test 9; Phase generating circuit 2 comprises control button circuit, and control button circuit produces circuit 2 and generate respectively at described simulation loop of electric leakage the half-wave rectified current of half-wave rectified current, electric current lagging voltage 135o and the half-wave rectified current of the electric current lagging voltage 0o that contains 6mA direct current of half-wave rectified current, the electric current lagging voltage 90o of electric current lagging voltage 0o for control phase.

Ac leakage regulating circuit 3 is for controlling the size of current of described simulation loop of electric leakage; Time detection circuit 4 is threaded off required time, i.e. actuation time for measuring from described simulation loop of electric leakage conducting to A type RCCB.

Described phase generating circuit 2 comprises: the first half-wave rectifying circuit of electric current lagging voltage 0o, the second half-wave rectifying circuit of electric current lagging voltage 90o, the 3rd half-wave rectifying circuit of electric current lagging voltage 135o, 6mA direct current generative circuit, and for according to described the first half-wave rectifying circuit, the control signal of the second half-wave rectifying circuit and the output of the 3rd half-wave rectifying circuit generates respectively the half-wave rectified current of electric current lagging voltage 0o in described simulation loop of electric leakage, the half-wave rectified current of electric current lagging voltage 90o, the controllable silicon current control circuit of the half-wave rectified current of electric current lagging voltage 135o and the half-wave rectified current of the electric current lagging voltage 0o that contains 6mA direct current.

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

Resistance R 12 is current-limiting resistances of triode BG3 base stage, triode BG3 and resistance R 13 form emitter follower, the control signal of electric current lagging voltage 135o in resistance R 13 is given triode BG18 by press button SB1, resistance R 58, triode BG18 drives opto-coupler chip IC4, resistance R 59 is current-limiting resistances, ensures 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, control the turn-on and turn-off of bidirectional triode thyristor BG19, resistance R 60, R61, for controlling the G utmost point input current of bidirectional triode thyristor BG19, make input signal enough trigger bidirectional triode thyristor BG19 conducting. A, K bis-utmost points of bidirectional triode thyristor BG19 are connected between load and AC power, and the electric current that flows through load is exactly the half-wave rectified current that lags behind voltage 135o. Control bidirectional triode thyristor BG19 and get final product the residue pulsating current that passes through regulation in control circuit, regulator potentiometer WR3, WR4, WR5 can control leakage current.

In the time that press button SB10 is closed, two intermediate contacts of press button SB10 are for the detection of phase generating circuit output waveform.

Described controllable silicon current control circuit comprises: according to the control signal of described the first half-wave rectifying circuit, the 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 being driven by triode BG18, the bidirectional triode thyristor BG19 that is controlled break-make by opto-coupler chip IC4, the A of bidirectional triode thyristor BG19, the K utmost point are connected in described simulation loop of electric leakage.

Described time detection circuit 4 comprises: single-chip microcomputer IC6, be connected with the detection of electrical leakage end of single-chip microcomputer IC6 for detection of the whether leakaging signal detecting circuit of conducting and the charactron for displaying time being connected with the temporal information output of single-chip microcomputer IC6 of described simulation loop of electric leakage; Single-chip microcomputer IC6 measures from described simulation loop of electric leakage conducting to A type RCCB and threads off required time show this time by described charactron according to the electric leakage signal of leakaging signal detecting circuit output.

Described phase generating circuit 2 is connected with the phase place display circuit 6 of the half-wave rectified current for showing the electric current lagging voltage 0o that described simulation loop of electric leakage exists the half-wave rectified current of the half-wave rectified current of electric current lagging voltage 0o or the half-wave rectified current of electric current lagging voltage 90o or electric current lagging voltage 135o or contain 6mA direct current.

AC power circuit is by 220V50Hz ac power supply to transformer T4, and transformer T4 output 180V, 220V, 250V, 380V voltage are connected to and exchange on output wiring terminal L1, N through band switch SA1. By the gear of adjusting band switch SA1, can change the voltage that exchanges output wiring terminal L1 and N two ends. The load of transformer T4 is ac leakage regulating circuit 3.

Ac leakage regulating circuit 3 is by transformer T4 output 26V alternating current, its output one end is connected to and exchanges output wiring terminal L1 after connecting with band switch SA2, the other end is connected to and exchanges output wiring terminal L2 after connecting with ammeter, electric leakage regulating resistance, bidirectional triode thyristor BG19, band switch SA3.

Logic circuit, press button that phase place display circuit 6 is made up of charactron LED1-LED4, diode D11-36, triode BG7-16 form.

In the time pressing the button switch S B4, current signal trigger triode BG20 conducting, triode BG20 output signal trigger triode BG7, BG8 conducting, charactron LED1 shows " A ", charactron LED2 shows " C ". While 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 filter circuit. DC power-supply circuit 7 comprises: the 5V DC power-supply circuit of being powered by transformer T1, the 5V DC power-supply circuit of being powered by transformer T3,12V DC power-supply circuit, 6mA direct current generative circuit.

Time detection circuit 4 is made up of press button, 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, press button SB5, SB6. One end of resistance R 67 is connected with the positive pole of 9V dry cell U, the other end of resistance R 67 is connected with the intermediate contact of press button SB5, the normally opened contact of press button SB5 is connected with normally opened contact, the normally-closed contact of press button SB6, normally opened contact, normally opened contact that 9V dry battery cathode meets press button SB6 are connected, the intermediate contact of press button SB6 is connected with direct current output wiring terminal "+", and the intermediate contact SB6-21 of press button SB6 is connected with direct current output "-".

The second half-wave rectifying circuit of electric current lagging voltage 90o 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 forms.

The first half-wave rectifying circuit of electric current lagging voltage 0o 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 forms. The positive terminal of diode D51 is extremely connected with the e of the triode BG22 in phase place display circuit, the negative pole end of diode D51 is connected with one end of resistance R 75, the other end of resistance R 75 is extremely connected with the b of triode BG28,2 pin of opto-coupler chip IC7 are extremely connected with the c of triode BG28, and the e utmost point of triode BG28 is connected with 2 pin of voltage-stabiliser tube BG21. One end of resistance R 74 is connected with 3 pin of voltage-stabiliser tube BG21, and 4,6 pin of opto-coupler chip IC7 are connected with press button SB3 intermediate contact SB3-21, normally opened contact SB3-22 respectively. Because there being the half-wave rectified current that contains 6mA direct current of electric current lagging voltage 0o in " the residue pulsating current of regulation ", therefore this part is for realizing " A0-6 " in the situation that, ensureing the output of the half-wave rectified current of electric current lagging voltage 0o.

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 form differential circuit, resistance R 80, R81, R82, R83, R84, R85, R86, R87 are the current-limiting resistance of the 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, BG26. Press button SB17 is testing button, and press button SB18 is SR.

In the time that press button SB17 is closed, breaker electrifying, DC current forms a spike through differential circuit, 1 pin of input single-chip microcomputer IC6, single-chip microcomputer IC6 starts timing. In the time of circuit breaker trip, opto-coupler chip IC5 dead electricity, 4,6 pin turn-off, and 3 pin of single-chip microcomputer IC6 have high level input, and single-chip microcomputer IC6 stops timing and exports data showing to charactron LED11. In the time that press button SB18 presses, single-chip microcomputer IC6, charactron LED11 zero clearing.

Above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention. For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description. Here without also giving exhaustive to all embodiments. And these belong to apparent variation that spirit of the present invention extended out or variation still among protection scope of the present invention.

Claims

1. there is a modified checkout equipment for time detection circuit, comprise AC power circuit, DC power-supply circuit, phase generating circuit, ac leakage regulating circuit, phase place display circuit, indicator light circuit and time detection circuit, it is characterized in that: AC power circuit has the first live wire end for forming load circuit and for forming the second live wire end of simulation loop of electric leakage, the first live wire end is with the second live wire end for being connected with the live wire input of equipment under test, and the zero line side of described load circuit is for being connected with the zero line side of equipment under test, described equipment under test is A type RCCB, phase generating circuit is for being connected with the live wire output L2 of equipment under test, phase generating circuit comprises control button circuit, and control button circuit produces circuit and generate respectively at described simulation loop of electric leakage the half-wave rectified current of half-wave rectified current, electric current lagging voltage 135o and the half-wave rectified current of the electric current lagging voltage 0o that contains 6mA direct current of half-wave rectified current, the electric current lagging voltage 90o of electric current lagging voltage 0o for control phase, ac leakage regulating circuit is for controlling the size of current of described simulation loop of electric leakage, time detection circuit is threaded off required time, i.e. actuation time for measuring from described simulation loop of electric leakage conducting to A type RCCB, described phase generating circuit comprises: the first half-wave rectifying circuit of electric current lagging voltage 0o, the second half-wave rectifying circuit of electric current lagging voltage 90o, the 3rd half-wave rectifying circuit of electric current lagging voltage 135o, 6mA direct current generative circuit and controllable silicon current control circuit, controllable silicon current control circuit is used for according to described the first half-wave rectifying circuit, the control signal of the second half-wave rectifying circuit and the output of the 3rd half-wave rectifying circuit generates respectively the half-wave rectified current of electric current lagging voltage 0o in described simulation loop of electric leakage, the half-wave rectified current of electric current lagging voltage 90o, the half-wave rectified current of the half-wave rectified current of electric current lagging voltage 135o and the electric current lagging voltage 0o that contains 6mA direct current, the 3rd half-wave rectifying circuit of described electric current lagging voltage 135o comprises: become circuit by transformer T2, diode D5, resistance R 3, R4, R5, R6, R7 and the sine wave shaped that operational amplifier IC1A forms, the charging circuit being formed by resistance R 8, capacitor C 5 being connected with the output of operational amplifier IC1A, formed by diode D6, D7 with door, be used for setting resistance R 9 and the R10 with respect to the voltage of adjusting of electric current lagging voltage 135o, resistance R 11 and the potentiometer WR1 of the comparative voltage with respect to electric current lagging voltage 135o of the backward end that is used for regulating operational amplifier IC1B, the output of operational amplifier IC1B is for the control signal of output current lagging voltage 135o, resistance R 12 is current-limiting resistances of triode BG3 base stage, triode BG3 and resistance R 13 form emitter follower, the control signal of electric current lagging voltage 135o in resistance R 13 is given triode BG18 by press button SB1, resistance R 58, triode BG18 drives opto-coupler chip IC4, resistance R 59 is current-limiting resistances, ensures 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, control the turn-on and turn-off of bidirectional triode thyristor BG19, resistance R 60, R61, for controlling the G utmost point input current of bidirectional triode thyristor BG19, make input signal enough trigger bidirectional triode thyristor BG19 conducting, A, K bis-utmost points of bidirectional triode thyristor BG19 are connected between load and AC power, and the electric current that flows through load is exactly the half-wave rectified current that lags behind voltage 135o, control bidirectional triode thyristor BG19 and get final product the residue pulsating current that passes through regulation in control circuit, regulator potentiometer WR3, WR4, WR5 can control leakage current, in the time that press button SB10 is closed, two intermediate contacts of press button SB10 are for the detection of phase generating circuit output waveform, described controllable silicon current control circuit comprises: according to the control signal of described the first half-wave rectifying circuit, the 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 being driven by triode BG18, the bidirectional triode thyristor BG19 that is controlled break-make by opto-coupler chip IC4, the A of bidirectional triode thyristor BG19, the K utmost point are connected in described simulation loop of electric leakage, described time detection circuit comprises: single-chip microcomputer IC6, be connected with the detection of electrical leakage end of single-chip microcomputer IC6 for detection of the whether leakaging signal detecting circuit of conducting and the charactron for displaying time being connected with the temporal information output of single-chip microcomputer IC6 of described simulation loop of electric leakage, single-chip microcomputer IC6 measures from described simulation loop of electric leakage conducting to A type RCCB and threads off required time show this time by described charactron according to the electric leakage signal of leakaging signal detecting circuit output, described 6mA direct current generative circuit is made up of resistance R 67,9V dry cell Bt, press button SB5, SB6, one end of resistance R 67 is connected with the positive pole of 9V dry cell U, the other end of resistance R 67 is connected with the intermediate contact of press button SB5, the normally opened contact of press button SB5 is connected with normally opened contact, the normally-closed contact of press button SB6,9V dry battery cathode connects the normally opened contact of press button SB6, the intermediate contact of press button SB6 is connected with direct current output wiring terminal "+", and the intermediate contact SB6-21 of press button SB6 is connected with direct current output "-",