CN105699887B - Improved detection equipment for testing residual current circuit breaker - Google Patents

Improved detection equipment for testing residual current circuit breaker Download PDF

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CN105699887B
CN105699887B CN201610080320.1A CN201610080320A CN105699887B CN 105699887 B CN105699887 B CN 105699887B CN 201610080320 A CN201610080320 A CN 201610080320A CN 105699887 B CN105699887 B CN 105699887B
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circuit
current
button switch
resistor
leakage
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CN105699887A (en
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胡小青
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Beijing Zhongdian Huake Electric Intelligent Technology Co ltd
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Yueqing Huazun Electric Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Breakers (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention relates to an improved detection device for testing a residual current circuit breaker, which comprises an alternating current power supply circuit, a phase generation circuit, an alternating current leakage adjusting circuit and a time detection circuit, wherein the phase generation circuit is connected with the alternating current power supply circuit; the phase generating circuit comprises a direct current generating circuit; the direct current generation circuit consists of a resistor R67, a 9V dry battery Bt, a button switch SB5 and a button switch SB 6; one end of a resistor R67 is connected with the anode of a 9V dry battery U, the other end of a resistor R67 is connected with the middle contact of a button switch SB5, the normally open contact of the button switch SB5 is connected with the normally open contact and the normally closed contact of a button switch SB6, the cathode of the 9V dry battery is connected with the normally open contact and the normally open contact of a button switch SB6, the middle contact of a button switch SB6 is connected with a direct current output terminal "+", and the middle contact SB6-21 of the button switch SB6 is connected with a direct current output "-". The invention has reasonable structure and can meet the special requirements of users.

Description

Improved detection equipment for testing residual current circuit breaker
Technical Field
The present invention relates to an improved detection device.
Background
According to the regulations of national standards GB14048.2-2001, GB16916.1-2003, GB16917.1-2003 and the like: a leakage breaker having a predetermined residual pulsating direct current or a predetermined residual sinusoidal alternating current, which is suddenly applied or slowly increased, and which can be surely tripped within a predetermined time is called an a-type leakage breaker. An earth leakage breaker that can ensure tripping within a predetermined time, regardless of sudden application or slow rise of a residual sinusoidal alternating current having no direct current component, is called an AC type earth leakage breaker. As can be seen from the above, the a-type residual current circuit breaker covers the function of the AC-type residual current circuit breaker.
The "predetermined residual ripple current" is 4 cases as follows: the power supply comprises a half-wave rectification current with 0-degree current lag voltage, a half-wave rectification current with 90-degree current lag voltage, a half-wave rectification current with 135-degree current lag voltage, and a half-wave rectification current with 0-degree current lag voltage and containing 6mA direct current.
There is no device for measuring the a-type residual current circuit breaker in the prior art.
Disclosure of Invention
The invention aims to solve the technical problem of providing improved detection equipment for testing a residual current circuit breaker, which has wider test range and more stable and reliable performance.
The detection device comprises an alternating current power supply circuit, a direct current power supply circuit, a phase generation circuit, an alternating current leakage regulating circuit, a phase display circuit, an indicator light circuit and a time detection circuit, and is characterized in that the alternating current power supply circuit comprises a first live wire end for forming a load loop and a second live wire end for forming a simulation leakage loop, the first live wire end and the second live wire end are used for being connected with a live wire input end of a tested device, the live wire end of the load loop is used for being connected with a zero line end of the tested device, the tested device is an A-type leakage circuit breaker, the phase generation circuit is used for being connected with a live wire output end 2 of the tested device, the phase generation circuit comprises a control button circuit for controlling the phase generation circuit to respectively generate a half-wave delay rectified current of 0 degree zero;
the time detection circuit comprises a button switch, rectifier diodes D46-49, a triode BG23-26, a resistor, a capacitor C15, a photoelectric coupler IC5, a singlechip IC6, a nixie tube L ED11 and the like;
when the button switch SB17 is closed, the circuit breaker is powered on, a sharp pulse is formed by direct current flowing through a differential circuit and is input to pin 1 of the singlechip IC6, the singlechip IC6 starts timing, when the circuit breaker trips, the optocoupler chip IC5 is powered off, pins 4 and 6 of the optocoupler chip IC5 are switched off, pin 3 of the singlechip IC6 has high level input, the singlechip IC6 stops timing and outputs data to the nixie tube L ED11 for displaying, and when the button switch SB18 is pressed, the singlechip IC6 and the nixie tube L ED11 are reset.
The invention has the positive effects that: according to the invention, the direct current generating circuit is improved, so that the structure is reasonable, and the test requirement of a special leakage circuit breaker can be effectively met.
Drawings
The invention will be further explained with reference to the drawings, in which:
FIG. 1 is a schematic view of the external structure of an improved detecting apparatus of embodiment 1;
FIG. 2 is a partial electrical schematic of the improved detecting apparatus of example 1;
FIG. 3 is another electrical schematic of the improved testing device of example 1.
Detailed Description
(example 1)
Referring to fig. 1 to 3, the present embodiment is an improved detection apparatus for testing a residual current circuit breaker, including: the circuit comprises an alternating current power supply circuit 1, a direct current power supply circuit 7, a phase generation circuit 2, an alternating current leakage adjusting circuit 3, a phase display circuit 6, an indicator light circuit 5 and a time detection circuit 4.
The alternating current power supply circuit 1 is provided with a first live wire end for forming a load circuit and a second live wire end for forming an analog leakage circuit, the first live wire end and the second live wire end are used for being connected with a live wire input end of the tested device 9, and a zero line end of the load circuit is used for being connected with a zero line end of the tested device 9. The device under test 9 in this embodiment is an a-type residual current circuit breaker.
The phase generating circuit 2 is used for being connected with a live wire output end L2 of the tested device 9, the phase generating circuit 2 comprises a control button circuit, and the control button circuit is used for controlling the phase generating circuit 2 to respectively generate a half-wave rectified current with 0-degree current lag voltage, a half-wave rectified current with 90-degree current lag voltage, a half-wave rectified current with 135-degree current lag voltage and a half-wave rectified current with 0-degree current lag voltage containing 6mA direct current in the analog leakage loop.
The alternating current leakage regulating circuit 3 is used for controlling the current of the analog leakage loop; the time detection circuit 4 is used for measuring the time required for the analog leakage circuit to be conducted to the tripping of the A-type leakage circuit breaker, namely the action time.
The phase generation circuit 2 includes: the leakage simulation circuit comprises a first half-wave rectifying circuit with 0 degree of current lag voltage, a second half-wave rectifying circuit with 90 degrees of current lag voltage, a third half-wave rectifying circuit with 135 degrees of current lag voltage, a 6mA direct current generating circuit and a silicon controlled current control circuit, wherein the silicon controlled current control circuit is used for respectively generating a half-wave rectifying current with 0 degree of current lag voltage, a half-wave rectifying current with 90 degrees of current lag voltage, a half-wave rectifying current with 135 degrees of current lag voltage and a half-wave rectifying current with 0 degree of current lag voltage containing 6mA direct current in the simulation leakage loop according to control signals output by the first half-wave rectifying circuit, the second half-wave rectifying circuit and the third half-wave rectifying circuit.
The current hysteresis voltage 135 ° third half-wave rectifier circuit includes: a sine wave shaping circuit composed of a transformer T2, a diode D5, resistors R3, R4, R5, R6, R7 and an operational amplifier IC1A, a charging circuit composed of a resistor R8 and a capacitor C5 connected with the output end of the operational amplifier IC1A, and an AND gate composed of diodes D6 and D7; resistors R9 and R10 for setting a setting voltage of 135 degrees relative to a current hysteresis voltage, a resistor R11 and a potentiometer WR1 for adjusting a comparison voltage of 135 degrees relative to the current hysteresis voltage at the inverting terminal of an operational amplifier IC1B, and an output terminal of the operational amplifier IC1B is used for outputting a control signal of 135 degrees relative to the current hysteresis voltage.
The resistor R12 is a current-limiting resistor of a base electrode of the triode BG3, the triode BG3 and the resistor R13 form an emitter follower, a control signal of current hysteresis voltage 135 degrees on the resistor R13 is sent to the triode BG18 through the button switch SB1 and the resistor R58, the triode BG18 drives the optocoupler chip IC4, and the resistor R59 is a current-limiting resistor, so that the optocoupler chip IC4 can work effectively. The optocoupler chip IC4 is used for isolating alternating current 220V from a direct current part of a phase generation circuit and controlling the on-off of the bidirectional thyristor BG19, and the resistors R60 and R61 are used for controlling the G pole input current of the bidirectional thyristor BG19 so that an input signal can trigger the bidirectional thyristor BG19 to be switched on. The A, K diode of the triac BG19 is connected in series between the load and the ac power source, and the current flowing through the load is a half-wave rectified current lagging behind the voltage of 135 °. The leakage current can be controlled by controlling the bidirectional thyristor BG19 to pass a specified residual ripple current in the circuit and adjusting potentiometers WR3, WR4 and WR 5.
When the push switch SB10 is closed, the two intermediate contacts of the push switch SB10 are used for detection of the output waveform of the phase generating circuit.
The thyristor current control circuit comprises: the triode BG18 is conducted according to control signals output by the first half-wave rectification circuit, the second half-wave rectification circuit and the third half-wave rectification circuit, the optocoupler chip IC4 is driven by the triode BG18, the bidirectional thyristor BG19 is controlled to be switched on and off by the optocoupler chip IC4, and the A, K pole of the bidirectional thyristor BG19 is connected in series in the analog leakage circuit.
The time detection circuit 4 includes: the analog leakage circuit comprises a singlechip IC6, a leakage signal detection circuit which is connected with a leakage detection end of the singlechip IC6 and is used for detecting whether the analog leakage circuit is conducted, and a nixie tube which is connected with a time information output end of the singlechip IC6 and is used for displaying time; the singlechip IC6 measures the time required by the conduction from the simulation leakage loop to the tripping of the A-type leakage circuit breaker according to the leakage signal output by the leakage signal detection circuit and displays the time through the nixie tube.
The phase generating circuit 2 is connected with a phase display circuit 6 for displaying the existence of a half-wave rectified current with 0 degree of current lag voltage or a half-wave rectified current with 90 degree of current lag voltage or a half-wave rectified current with 135 degree of current lag voltage or a half-wave rectified current with 0 degree of current lag voltage containing 6mA direct current in the analog leakage loop.
The AC power circuit is powered by 220V 50Hz AC power to a transformer T4, the voltage output by the transformer T4 is 180V, 220V, 250V and 380V, and is connected to AC output terminals L1 and N through a band switch SA1, the voltage at two ends of AC output terminals L1 and N can be changed by adjusting the gear of the band switch SA1, and the load of the transformer T4 is an AC leakage adjusting circuit 3.
The ac leakage adjusting circuit 3 outputs 26V ac power from the transformer T4, one end of the output end of the ac leakage adjusting circuit is connected in series with the band switch SA2 and then connected to the ac output terminal L1, and the other end of the output end of the ac leakage adjusting circuit is connected in series with the ammeter, the leakage adjusting resistor, the triac BG19 and the band switch SA3 and then connected to the ac output terminal L2.
The phase display circuit 6 consists of a logic circuit consisting of nixie tubes L ED 1-L ED4, diodes D11-36 and triodes BG7-16, and a button switch.
When the button switch SB4 is pressed, a current signal triggers the triode BG20 to be conducted, the triode BG20 outputs a signal to trigger the triodes BG7 and BG8 to be conducted, the nixie tube L ED1 displays "A", the nixie tube L ED2 displays "C", when the button switch SB3 is pressed, the nixie tubes L0 ED1 and L ED4 display "A0", the button switch SB2 is pressed, the nixie tubes L ED1, L ED3 and L ED4 display "A90", the button switch SB5 is pressed, the nixie tubes L ED1, L ED2, L ED3 and L ED4 display "A0-6".
The indicator light circuit 5 consists of a transformer T4, rectifier diodes D42-45, a three-terminal regulator BG27 and an RC filter circuit. The dc power supply circuit 7 includes: a 5V DC power supply circuit supplied by a transformer T1, a 5V DC power supply circuit supplied by a transformer T3, a 12V DC power supply circuit, and a 6mA DC generating circuit.
The time detection circuit 4 comprises a button switch, rectifier diodes D46-49, a triode BG23-26, a resistor, a capacitor C15, a photoelectric coupler IC5, a singlechip IC6, a nixie tube L ED11 and the like.
The 6mA direct current generating circuit consists of a resistor R67, a 9V dry battery Bt, a button switch SB5 and a button switch SB 6. One end of a resistor R67 is connected with the anode of a 9V dry battery U, the other end of a resistor R67 is connected with the middle contact of a button switch SB5, the normally open contact of the button switch SB5 is connected with the normally open contact and the normally closed contact of a button switch SB6, the cathode of the 9V dry battery is connected with the normally open contact and the normally open contact of a button switch SB6, the middle contact of a button switch SB6 is connected with a direct current output terminal "+", and the middle contact SB6-21 of the button switch SB6 is connected with a direct current output "-".
The second half-wave rectification circuit with the current lag voltage of 90 degrees is composed of resistors R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R57, R58, R59, R60 and R61, a capacitor C6, diodes D8, D9 and D10, triodes BG5 and BG18, a bidirectional thyristor BG19, an operational amplifier IC2, an optical coupling chip IC4 and a potentiometer WR 2.
The first half-wave rectification circuit with the current hysteresis voltage of 0 ℃ is composed of resistors R50, R51, R52, R53, R54, R55, R56, R57, R58, R59, R60, R61, a diode D37, triodes BG17 and BG18, a bidirectional thyristor BG19, an operational amplifier IC3 and an optocoupler chip IC 4. The positive electrode end of the diode D51 is connected with the e pole of a triode BG22 in the phase display circuit, the negative electrode end of the diode D51 is connected with one end of a resistor R75, the other end of the resistor R75 is connected with the b pole of a triode BG28, the 2 pin of the optocoupler chip IC7 is connected with the c pole of the triode BG28, and the e pole of the triode BG28 is connected with the 2 pin of a voltage regulator BG 21. One end of the resistor R74 is connected with a pin 3 of the voltage regulator BG21, and pins 4 and 6 of the optical coupling chip IC7 are respectively connected with a middle contact SB3-21 and a normally open contact SB3-22 of the button switch SB 3. Because the 'specified residual pulsating current' contains the half-wave rectified current with the current lag voltage of 0 degree and containing 6mA direct current, the part is to ensure the output of the half-wave rectified current with the current lag voltage of 0 degree under the condition of 'A0-6'.
Resistors R73 and R77 are current-limiting resistors of an optocoupler chip IC5, a resistor R78 is a current-limiting resistor of a pin 1 of a singlechip IC6, a capacitor C15 and a resistor R79 form a differential circuit, resistors R80, R81, R82, R83, R84, R85, R86 and R87 are current-limiting resistors of pins of a nixie tube L ED11, resistors R88, R89, R90 and R91 are current-limiting resistors of b poles of triodes BG23, BG24, BG25 and BG26, a button switch SB17 is a test button, and a button switch SB18 is a reset button.
When the button switch SB17 is closed, the circuit breaker is powered on, a sharp pulse is formed by direct current flowing through a differential circuit and is input to pin 1 of the singlechip IC6, the singlechip IC6 starts timing, when the circuit breaker trips, the optocoupler chip IC5 is powered off, pins 4 and 6 of the optocoupler chip IC5 are switched off, pin 3 of the singlechip IC6 has high level input, the singlechip IC6 stops timing and outputs data to the nixie tube L ED11 for displaying, and when the button switch SB18 is pressed, the singlechip IC6 and the nixie tube L ED11 are cleared.
The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious variations or modifications which fall within the spirit of the invention are intended to be covered by the scope of the present invention.

Claims (1)

1. An improved detection device for testing a residual current circuit breaker comprises an alternating current power supply circuit, a direct current power supply circuit, a phase generation circuit, an alternating current residual current adjusting circuit, a phase display circuit, an indicator light circuit and a time detection circuit; the method is characterized in that: the alternating current power supply circuit is provided with a first live wire end for forming a load loop and a second live wire end for forming an analog leakage loop, the first live wire end and the second live wire end are used for being connected with a live wire input end of tested equipment, and a zero line end of the load loop is used for being connected with a zero line end of the tested equipment; the tested device is an A-type residual current circuit breaker;
the phase generating circuit comprises a control button circuit, an alternating current leakage regulating circuit, a time detecting circuit and a control circuit, wherein the control button circuit is used for controlling the phase generating circuit to respectively generate a half-wave rectification current with 0-degree current lag voltage, a half-wave rectification current with 90-degree current lag voltage, a half-wave rectification current with 135-degree current lag voltage and a half-wave rectification current with 0-degree current lag voltage containing 6mA direct current in the analog leakage circuit;
the phase generation circuit includes: the current control circuit is used for respectively generating a half-wave rectification current with 0-degree current lag voltage, a half-wave rectification current with 90-degree current lag voltage, a second half-wave rectification circuit with 90-degree current lag voltage, a third half-wave rectification circuit with 135-degree current lag voltage, a 6mA direct current generation circuit and a SCR current control circuit according to control signals output by the first half-wave rectification circuit, the second half-wave rectification circuit and the third half-wave rectification circuit, wherein the half-wave rectification current with 0-degree current lag voltage, the half-wave rectification current with 90-degree current lag voltage, the half-wave rectification current with 135-degree current lag voltage and the half-wave rectification current with 0-degree current lag voltage containing 6mA direct current in the analog leakage loop; the current hysteresis voltage 135 ° third half-wave rectifier circuit includes: a sine wave shaping circuit composed of a transformer T2, a diode D5, resistors R3, R4, R5, R6, R7 and an operational amplifier IC1A, a charging circuit composed of a resistor R8 and a capacitor C5 connected with the output end of the operational amplifier IC1A, and an AND gate composed of diodes D6 and D7; resistors R9 and R10 for setting a setting voltage of 135 degrees relative to a current hysteresis voltage, a resistor R11 and a potentiometer WR1 for adjusting a comparison voltage of 135 degrees relative to the current hysteresis voltage at the reverse end of an operational amplifier IC1B, wherein the output end of the operational amplifier IC1B is used for outputting a control signal of 135 degrees of the current hysteresis voltage; the resistor R12 is a current-limiting resistor of a base electrode of the triode BG3, the triode BG3 and the resistor R13 form an emitter follower, a control signal of current hysteresis voltage 135 degrees on the resistor R13 is sent to the triode BG18 through a button switch SB1 and a resistor R58, the triode BG18 drives an optocoupler chip IC4, and the resistor R59 is a current-limiting resistor, so that the optocoupler chip IC4 can work effectively; the optocoupler chip IC4 is used for isolating alternating current 220V from a direct current part of a phase generation circuit and controlling the on-off of the bidirectional thyristor BG19, and the resistors R60 and R61 are used for controlling the G pole input current of the bidirectional thyristor BG19 so that an input signal can trigger the bidirectional thyristor BG19 to be switched on; the A, K diode of the bidirectional thyristor BG19 is connected in series between the load and the alternating current power supply, and the current flowing through the load is half-wave rectified current lagging behind the voltage by 135 degrees; the leakage current can be controlled by controlling the bidirectional thyristor BG19, namely, the regulated residual ripple current can be controlled in the circuit, and the potentiometers WR3, WR4 and WR5 are adjusted; when the push switch SB10 is closed, the two intermediate contacts of the push switch SB10 are used for detection of the output waveform of the phase generating circuit; the thyristor current control circuit comprises: the triode BG18 is conducted according to control signals output by the first half-wave rectification circuit, the second half-wave rectification circuit and the third half-wave rectification circuit, the optocoupler chip IC4 is driven by the triode BG18, the bidirectional thyristor BG19 is controlled to be switched on and off by the optocoupler chip IC4, and the A, K pole of the bidirectional thyristor BG19 is connected in series in the analog leakage circuit; the time detection circuit includes: the analog leakage circuit comprises a singlechip IC6, a leakage signal detection circuit which is connected with a leakage detection end of the singlechip IC6 and is used for detecting whether the analog leakage circuit is conducted, and a nixie tube which is connected with a time information output end of the singlechip IC6 and is used for displaying time; the singlechip IC6 measures the time required by the conduction from the simulation leakage loop to the tripping of the A-type leakage circuit breaker according to the leakage signal output by the leakage signal detection circuit and displays the time through the nixie tube; the 6mA direct current generating circuit consists of a resistor R67, a 9V dry battery Bt, a button switch SB5 and a button switch SB 6; one end of a resistor R67 is connected with the anode of a 9V dry battery U, the other end of a resistor R67 is connected with the middle contact of a button switch SB5, the normally open contact of the button switch SB5 is connected with the normally open contact and the normally closed contact of a button switch SB6, the cathode of the 9V dry battery is connected with the normally open contact of a button switch SB6, the middle contact of a button switch SB6 is connected with a direct current output terminal "+", and the middle contact SB6-21 of the button switch SB6 is connected with a direct current output "-";
the time detection circuit comprises a button switch, rectifier diodes D46-49, a triode BG23-26, a resistor, a capacitor C15, a photoelectric coupler IC5, a singlechip IC6, a nixie tube L ED11 and the like;
when the button switch SB17 is closed, the circuit breaker is powered on, a sharp pulse is formed by direct current flowing through a differential circuit and is input to pin 1 of the singlechip IC6, the singlechip IC6 starts timing, when the circuit breaker trips, the optocoupler chip IC5 is powered off, pins 4 and 6 of the optocoupler chip IC5 are switched off, pin 3 of the singlechip IC6 has high level input, the singlechip IC6 stops timing and outputs data to a nixie tube L ED11 for display, and when the button switch SB18 is pressed, the singlechip IC6 and the nixie tube L ED11 are cleared;
two output ends of the alternating current power supply circuit are respectively connected with the tested equipment and the direct current power supply circuit; four output ends of the direct current power supply circuit are respectively connected with the phase generating circuit, the phase display circuit, the indicator light circuit and the time detection circuit; the output end of the tested device is connected with the phase generating circuit; two output ends of the phase generating circuit are respectively connected with the alternating current leakage regulating circuit and the phase display circuit; the output end of the phase display circuit is connected with the indicator light circuit; two output ends of the alternating current leakage regulating circuit are respectively connected with the alternating current power supply circuit and the time detection circuit.
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CN201210262488.6A CN102749579B (en) 2012-07-27 2012-07-27 A kind of for testing the modified checkout equipment of RCCB

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CN201610078279.4A Pending CN105699885A (en) 2012-07-27 2012-07-27 Improved type detection device having phase generation circuit
CN201210262488.6A Expired - Fee Related CN102749579B (en) 2012-07-27 2012-07-27 A kind of for testing the modified checkout equipment of RCCB
CN201610079065.9A Withdrawn CN105606995A (en) 2012-07-27 2012-07-27 Improved detection equipment having time detection circuit
CN201610080320.1A Active CN105699887B (en) 2012-07-27 2012-07-27 Improved detection equipment for testing residual current circuit breaker
CN201610078280.7A Pending CN105572578A (en) 2012-07-27 2012-07-27 Improved detection device for testing residual-current circuit breaker
CN201610079235.3A Withdrawn CN105699886A (en) 2012-07-27 2012-07-27 Improved type detection device having alternating current electric leakage adjusting circuit
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CN201210262488.6A Expired - Fee Related CN102749579B (en) 2012-07-27 2012-07-27 A kind of for testing the modified checkout equipment of RCCB
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CN201610080612.5A Withdrawn CN105572579A (en) 2012-07-27 2012-07-27 Improved detection device with time detection circuit

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东南大学实验报告——单相半波可控整流电路;黄一航;《百度文库》;20120518;第1-9页 *
基于单片机控制的剩余电流动作保护器动作特性检测装置的研究;李文苹;《中国优秀硕士论文学位论文全文数据库 工程科技Ⅱ辑》;20120715(第7期);正文第23、24、27、28页，图3.15 *
智能剩余电流保护器校测仪设计;史佳欢等;《电子测量技术》;20070331;第30卷(第3期);第186-190页 *

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CN102749579B (en) 2016-05-04
CN105699887A (en) 2016-06-22
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CN102749579A (en) 2012-10-24
CN105699886A (en) 2016-06-22
CN105606995A (en) 2016-05-25
CN105572579A (en) 2016-05-11
CN105699885A (en) 2016-06-22

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