CN202748457U

CN202748457U - Improved detecting device

Info

Publication number: CN202748457U
Application number: CN 201220366624
Authority: CN
Inventors: 胡小青
Original assignee: Suzhou Beitente Electronic Technology Co Ltd
Current assignee: Suzhou Beitente Electronic Technology Co Ltd
Priority date: 2012-07-27
Filing date: 2012-07-27
Publication date: 2013-02-20
Anticipated expiration: 2022-07-27

Abstract

The utility model relates to an improved detecting device which comprises an alternating current power supply circuit, a phase producing circuit, an alternating current leakage adjusting circuit and a time detecting circuit. The phase producing circuit comprises a first half-wave rectification circuit in which the current lags behind the voltage, and the delay is 0 degree. The first half-wave rectification circuit is composed of an R50 resistor, an R51 resistor, an R52 resistor, an R53 resistor, an R54 resistor, an R55 resistor, an R56 resistor, an R57 resistor, an R58 resistor, an R59 resistor, an R60 resistor, an R61 resistor, a D37 diode, a BG17 audion, a BG18 audion, a BG19 bidirectional triode thyristor, an IC3 operational amplifier, and an IC4 optocoupler chip. An e electrode of the BG17 audion is connected with a second pin of a BG21 stabilivolt. One end of an R74 resistor is connected with a third pin of the BG21 stabilivolt. A fourth pin and a sixth pin of an IC7 optocoupler chip are respectively connected with a SB3-21 intermediate contact and a SB3-22 normally open contact of a SB3 push button switch. The improved detecting device is reasonable in structure and can meet special requirements of users.

Description

The modified checkout equipment

Technical field

The utility model 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 no matter being to apply suddenly or the residue pulsating direct current with regulation or the residue simple sinusoidal alternating current of rising, can guarantee that the residual current circuit breaker of threading off at the appointed time is called A type residual current circuit breaker.To no matter be apply suddenly or rising have a residue simple sinusoidal alternating current without DC component, can guarantee the residual current circuit breaker of threading off at the appointed time to be called AC type residual current circuit breaker.As from the foregoing, A type residual current circuit breaker has covered the function of AC type residual current circuit breaker.

Above-mentioned " the residue pulsating current of regulation " is following 4 kinds of situations: 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 residual current circuit breaker is measured in the prior art.

The utility model content

Technical problem to be solved in the utility model provides a kind of test specification extensively and the comparatively reliable and stable modified checkout equipment of performance.

For solving the problems of the technologies described above, the utility model provides a kind of modified checkout equipment, comprises AC power circuit, phase generating circuit, ac leakage regulating circuit and time detection circuit; Phase generating circuit comprises the first half-wave rectifying circuit of 0 ° of electric current lagging voltage; Described the first half-wave rectifying circuit is by resistance R 50, R51, R52, R53, R54, R55, R56, R57, R58, R59, R60, R61, diode D37, and triode BG17, BG18, bidirectional triode thyristor BG19, operational amplifier IC3, opto-coupler chip IC4 consists of; 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.

The utlity model has positive effect: (1) the utility model makes its structure comparatively reasonable by improving the first half-wave rectifying circuit, testing requirement that can the special residual current circuit breaker of to satisfy effectively.

Description of drawings

The utility model is further explained below in conjunction with accompanying drawing, and 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.

Embodiment

(embodiment 1)

See Fig. 1-3, the present embodiment is a kind of modified checkout equipment for the test residual current circuit breaker, 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 for the first live wire end that consists of load circuit and is used for consisting of the second live wire end of simulating loop of electric leakage, 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 described 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 residual current circuit breaker 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 described 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 for controlling the size of current of described simulation loop of electric leakage; Time detection circuit 4 is used for measuring from the conducting of described simulation loop of electric leakage to A type residual current circuit breaker threads off required time, i.e. actuation time.

Described phase generating circuit 2 comprises: the first half-wave rectifying circuit that the electric current lagging voltage is 0 °, the 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 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 0 ° of electric current lagging voltage in described 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 described 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 consists of, the charging circuit that is consisted of by resistance R 8, capacitor C 5 that links to each other with the output terminal of operational amplifier IC1A, consisted of 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 resistance R 11 and the 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 consist of emitter follower, the control signal that electric current lagging voltage on the resistance R 13 is 135 ° is given triode BG18 by pushbutton switch SB1, resistance R 58, triode BG18 drives opto-coupler chip IC4, 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, the turn-on and turn-off of control bidirectional triode thyristor BG19, resistance R 60, R61 are used for the G utmost point input current of control 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 by stipulating in the operation circuit, and regulator potentiometer WR3, WR4, WR5 can control 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.

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 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 described simulation loop of electric leakage.

Described time detection circuit 4 comprises: single-chip microcomputer IC6, link to each other with the detection of electrical leakage end of single-chip microcomputer IC6 for detection of described simulation the loop of electric leakage whether leakaging signal detecting circuit of conducting and the charactron that is used for displaying time that links to each other with the temporal information output terminal of single-chip microcomputer IC6; Single-chip microcomputer IC6 measures according to the electric leakage signal of leakaging signal detecting circuit output and threads off the required time from the conducting of described simulation loop of electric leakage to A type residual current circuit breaker and show this time by described charactron.

Described phase generating circuit 2 is connected be used to showing that there is the half-wave rectified current of 135 ° of the half-wave rectified current of 90 ° of the half-wave rectified current of 0 ° of electric current lagging voltage or electric current lagging voltages or electric current lagging voltages in described simulation loop of electric leakage or contains the phase place display circuit 6 of half-wave rectified current of 0 ° of the electric current lagging voltage of 6mA direct current.

To transformer T4,

transformer T4 output

180V, 220V, 250V, 380V voltage are connected to through waver SA1 and exchange on output wiring terminal L1, the N AC power circuit by 220V 50Hz ac power supply.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, 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 regulating resistance, bidirectional triode thyristor BG19, waver SA3 connects, be connected to interchange output wiring terminal L2.

Phase place display circuit 6 is comprised of logical circuit, the 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 trigger 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 comprised 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 comprised 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 comprised 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, 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 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 consists of.

The 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 consists of.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 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 ", therefore this part is for realizing in the situation that " A0-6 " guarantees the output of the half-wave rectified current of 0 ° of electric current lagging voltage.

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 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, BG26.Pushbutton switch SB17 is testing button, and pushbutton switch SB18 is reset button.

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 begins timing.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 exports data showing to charactron LED11.When pushbutton switch SB18 presses, single-chip microcomputer IC6, charactron LED11 zero clearing.

Above-described embodiment only is for the utility model example clearly is described, and is not to be restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And these belong to apparent variation or the change that spirit of the present utility model extended out and still are among the protection domain of the present utility model.

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 first half-wave rectifying circuit of 0 ° of electric current lagging voltage; Described the first half-wave rectifying circuit is by resistance R 50, R51, R52, R53, R54, R55, R56, R57, R58, R59, R60, R61, diode D37, and triode BG17, BG18, bidirectional triode thyristor BG19, operational amplifier IC3, opto-coupler chip IC4 consists of; 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.