CN103267923B - Safety ground general-purpose on-line detector - Google Patents
Safety ground general-purpose on-line detector Download PDFInfo
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Abstract
The present invention relates to low-voltage power supply system earthing detection field, the safety ground carrying out equipment is the important technique measure guaranteeing safety utilization of electric power.The object of this invention is to provide a kind of safety ground general-purpose on-line detector, it is characterized in that in safety ground, utilize the low-voltage of transformer secondary output winding as sensed signal sources, safety ground general-purpose on-line detector also adds intelligent digital corollary apparatus, the safety ground effect of complete detection user ground wire is used for this, there is the correct connection to safety ground, ground current, the function of the complete detection such as stake resistance, can to power supply, electricity consumption, the commercial house, residential quarters, the safety ground of independent resident family etc., lightning-arrest, the safety grounds such as consumer detect, guarantee safety utilization of electric power, circuit of the present invention is simple, cost is low, be easy to install, easy to operate advantage, very with practical value.
Description
Technical field
The present invention relates to low-voltage power supply system earthing detection field, particularly safety ground general-purpose on-line detector.
Background technology
Low-voltage power supply system is contained all with electrical domain, and carrying out safe power supply work is a very important job, and the safety ground of consumer is the important technique measure guaranteeing safety utilization of electric power.But someone thinks that interchange 380/220 volt of low-voltage power supply voltage is not very high, awareness of safety is Strong not, lack again the bracing wire of safety utilization of electric power general knowledge Sui meaning and connect electricity, wrong ground wire and miss the operations lack of standardization such as ground wire, consumer is made to there is essential safety hidden danger, so the accident that person electric shock occurs mostly occurs in this field.How to find the potential safety hazard detecting consumer, lack simple and effective measure at present.Single-phase three pole sockets of such as the simplest AC 220 V, because existing socket is that protection against electric shock jack gap is little and baffle plate is housed, test pencil or universal electric meter indicator not easily inject, even take socket apart could check, so, even if see that it is unscientific for having ground wire qualified with eyes, as separated in ground connection or loose contact or the unearthed line of the other end, be just equal to nothing ground connection.These all prove that the on-line detector of a kind of Simple multifunction of anxious palpus is at present to the reliability of the security and earth system that judge consumer, to eliminate safe hidden trouble, stops the generation of accident.
Summary of the invention
The object of the invention is for above-mentioned defect, provide one to meet safety requirements, easy and simple to handle, the safety ground general-purpose on-line detector judging consumer security performance can be detected.
Technical scheme of the present invention is a kind of safety ground general-purpose on-line detector, it is characterized in that on safety line, utilize the low-voltage of transformer secondary output winding as sensed signal sources, the safety ground effect of complete detection user ground wire is used for this, single-phase tripolar plug CHT1 inserts in the single-phase three pole socket CHZ1 of user, series transformer BT secondary winding BL4 on ground wire after running through zero-sequence transformer BL2, transformer BT armature winding BL3 connects alternating current 220V power supply, by the diverse location of switch ZK1, the safety ground of consumer and related ground parameter are quantitatively detected, judge the safety ground effect of detected object with this comprehensively, user single-phase three pole socket CHZ1 and user's earth leakage circuit-breaker RCD1 are detected objects, also be the working power of safety ground general-purpose on-line detector, particular circuit configurations is the ground wire PE2 connecting test hole CS1 of single-phase tripolar plug CHT1, the ground wire PE3 of common single-phase three pole socket CHZ2, potentiometer WR1 with run through zero-sequence transformer BL2 after be connected the switch contact A1 of switch ZK1, the secondary winding BL4 of switch contact A0 connection transformer BT and relay J 3 coil, the other end of transformer BT secondary winding BL4 connects the other end of relay J 3 coil and the ground wire PE4 of single-phase three pole socket CHZ3 and instrument connection CS2, the live wire L2 of single-phase tripolar plug CHT1 connects power switch K1 through overcurrent fuse RD1, the power switch K1 other end connects checkout button SBNP1, resistance R1, the normally opened contact of relay J 3, the common single-phase live wire L3 of three pole socket CHZ2 and the trip switch J2 of earth leakage circuit-breaker RCD2, the single-phase live wire L4 of three pole socket CHZ3 and the armature winding BL3 of transformer BT is connected after the other end of trip switch J2 runs through zero-sequence transformer BL2, the other end contact resistance R3 of checkout button SBNP1, the other end of resistance R1 connects the negative pole of diode D1, the negative pole of the positive pole connecting luminous diode LED1 of diode D1, the other end contact resistance R2 of relay J 3 normally opened contact, the other end of resistance R2 connects the negative pole of diode D2, the negative pole of the positive pole connecting luminous diode LED2 of diode D2, the positive pole of the zero line N2 connecting luminous diode LED1 of single-phase tripolar plug CHT1, the positive pole of LED 2, the other end of resistance R3, the zero line N3 of common single-phase three pole socket CHZ2, run through the other end of connection transformer BT armature winding BL3 and the zero line N4 of single-phase three pole socket CHZ3 and instrument connection CS3 after zero-sequence transformer BL2, switch contact A2 connects the sliding point of the potentiometer WR1 other end and potentiometer WR1, in earth leakage circuit-breaker RCD2, zero-sequence transformer BL2 coil two extension lines connect two input ends of amplification control circuit Q2, amplification control circuit Q2 exports one end and connects trip switch J2 coil, amplification control circuit Q2 exports the other end that the other end connects trip switch J2 coil, diode D1 and diode D2 is for improving the breakdown reverse voltage of LED 1 and LED 2.
Described a kind of safety ground general-purpose on-line detector, it is characterized in that installing intelligent digital corollary apparatus additional on safety ground general-purpose on-line detector, particular circuit configurations is that intelligent digital corollary apparatus is by processor of single chip computer CPU, analog-digital conversion a/d 1, analog-digital conversion a/d 2, analog-digital conversion a/d 3, isolating amplifier circuit Q3, isolating amplifier circuit Q4, isolating amplifier circuit Q5 forms, ground wire between the switch contact A0 of switch ZK1 and transformer BT secondary coil BL4 runs through current transformer BL5, gather the electric current of safety line, current transformer BL5 coil two ends connect two input ends of isolating amplifier circuit Q3 respectively, the output terminal connection mode number conversion A/D1 input end of isolating amplifier circuit Q3, analog-digital conversion a/d 1 output terminal connects display and the process that processor of single chip computer CPU carries out testing ground current, the two input ends connecting test hole CS1 and instrument connection CS2 respectively of isolating amplifier circuit Q4, the output terminal connection mode number conversion A/D2 input end of isolating amplifier circuit Q4, analog-digital conversion a/d 2 output terminal connects processor of single chip computer CPU and shows voltage signal change and process, instrument connection CS2 and instrument connection CS4 connect two input ends of isolating amplifier circuit Q5 respectively, the output terminal connection mode number conversion A/D3 input end of isolating amplifier circuit Q5, analog-digital conversion a/d 3 output terminal connects processor of single chip computer CPU and carries out detection display process to equipotential, processor of single chip computer CPU has display translation interface XS, printout interface DY, communication exports TX interface.
A kind of safety ground general-purpose on-line detector is characterized in that this safety ground general-purpose on-line detector is that conventional electrical appliance relay controls, particular circuit configurations is the ground wire PE22 connecting test hole CS21 of single-phase tripolar plug CHT21, the ground wire PE23 of common single-phase three pole socket CHZ22, potentiometer WR21, self-inspection button SB and relay J 22 coil, the relay J 22 coil other end connects the switch contact A21 of switch ZK22, switch contact A23 connection transformer BT21 secondary winding BL23, the other end of transformer BT21 secondary winding BL23 connects the other end of self-inspection button SB, the ground wire PE24 of instrument connection CS22 and single-phase three pole socket CHZ23, the other end of potentiometer WR21 is connected the switch contact A22 of switch ZK22 with the sliding point of potentiometer WR1, the live wire L22 of single-phase tripolar plug CHT21 is through overcurrent fuse RD21 contact resistance R21, checkout button SBNP21 and power switch K21, the other end contact resistance R23 of checkout button SBNP21, the other end of resistance R21 connects the negative pole of diode D21, the negative pole of the positive pole connecting luminous diode LED21 of diode D21, the other end of power switch K21 connects the live wire L23 of common single-phase three pole socket CHZ22, resistance R22, to release the button the normally opened contact of QSB and contactor KM, the other end of resistance R22 connects the negative pole of diode D22, the negative pole of the positive pole connecting luminous diode LED22 of diode D22, the other end of QSB of releasing the button connects and turns off button TSB, the other end of contactor KM normally opened contact, the live wire L24 of single-phase three end socket CHZ23 and transformer BT21 armature winding BL22, the other end closing disconnecting button TSB connects the normally closed contact of relay J 22, the normally closed contact other end of relay J 22 connects contactor KM coil, the zero line N22 of single-phase tripolar plug CHT21 connects the other end of contactor KM coil, the other end of resistance R23, the positive pole of LED 21, the positive pole of LED 22, the zero line N23 of common single-phase three pole socket CHZ22, instrument connection CS23, the other end of transformer BT21 armature winding BL22 and the zero line N24 of single-phase three pole socket CHZ23.
Safety ground general-purpose on-line detector of the present invention has the function of the complete detection such as correct connection, ground current, stake resistance to safety ground, can detect the stake resistance of the safety grounds such as the safety ground of power supply, electricity consumption, the commercial house, residential quarters, independent resident family etc., lightning-arrest, consumer, guarantee safety utilization of electric power, circuit of the present invention is simple, cost is low, be easy to install, easy to operate advantage, very with practical value.
Accompanying drawing explanation
Fig. 1 safety ground general-purpose on-line detector circuit theory schematic diagram one
Fig. 2 safety ground general-purpose on-line detector circuit theory schematic diagram two
Fig. 3 safety ground general-purpose on-line detector circuit theory schematic diagram three
Single-phase three pole sockets of CHZ1 user in Fig. 1, common single-phase three pole sockets of CHZ2, single-phase three pole sockets of CHZ3, CHT1 single-phase tripolar plug, RCD1 user's earth leakage circuit-breaker, RCD2 earth leakage circuit-breaker, J1-J2 trip switch, J3 relay, Q1-Q2 amplification control circuit, BL1-BL2 zero-sequence transformer, BT transformer, BL3 armature winding, BL4 secondary winding, L single phase poaer supply live wire L1-L4 single phase poaer supply live wire, N single phase poaer supply zero line, N1-N4 single phase poaer supply zero line, PE0-PE4 ground wire, RD1 fuse, K1 power switch, SBNP1 checkout button, LED1-LED2 light emitting diode, D1-D2 diode, R1-R3 resistance, WR1 potentiometer, ZK1 switch, A0-A2 switch contact, CS1-CS3 instrument connection.
Q3-Q5 isolating amplifier circuit, A/D1-A/D3 analog to digital conversion, CPU processor of single chip computer, XS display translation, DY printout, TX communication output, BL5 current transformer, CS4 instrument connection (other is identical with Fig. 1) in Fig. 2.
Single-phase three pole sockets of CHZ21 user in Fig. 3, common single-phase three pole sockets of CHZ22, single-phase three pole sockets of CHZ23, CHT21 single-phase tripolar plug, RCD21 user's earth leakage circuit-breaker, J21 trip switch, J22 relay, Q21 amplification control circuit, BL21 zero-sequence transformer, L single phase poaer supply live wire, L21-L24 single phase poaer supply live wire, N single phase poaer supply zero line, N21-N24 single phase poaer supply zero line, PE20-PE24 ground wire, RD21 fuse, K21 power switch, LED21-LED22 light emitting diode, D21-D22 diode, R21-R23 resistance, WR21 potentiometer, ZK22 switch, A21-A23 switch contact, BT21 transformer, BL22 armature winding, BL23 secondary winding, SBNP21 checkout button, SB self-inspection button, QSB releases the button, TSB turns off button, KM contactor, CS1-CS3 instrument connection.
Embodiment
Safety ground general-purpose on-line detector can use various different housing or existing various slotting Xiao's plate housing, and the embodiment of particular circuit configurations is:
Fig. 1 is safety ground general-purpose on-line detector circuit theory schematic diagram one, circuit implementation is the ground wire PE2 connecting test hole CS1 of single-phase tripolar plug CHT1, the ground wire PE3 of common single-phase three pole socket CHZ2, potentiometer WR1 with run through zero-sequence transformer BL2 after be connected the switch contact A1 of switch ZK1, the secondary winding BL4 of switch contact A0 connection transformer BT and relay J 3 coil, the other end of transformer BT secondary winding BL4 connects the other end of relay J 3 coil and the ground wire PE4 of single-phase three pole socket CHZ3 and instrument connection CS2, the live wire L2 of single-phase tripolar plug CHT1 connects power switch K1 through overcurrent fuse RD1, the power switch K1 other end connects checkout button SBNP1, resistance R1, the normally opened contact of relay J 3, the common single-phase live wire L3 of three pole socket CHZ2 and the trip switch J2 of earth leakage circuit-breaker RCD2, the single-phase live wire L4 of three pole socket CHZ3 and the armature winding BL3 of transformer BT is connected after the other end of trip switch J2 runs through zero-sequence transformer BL2, the other end contact resistance R3 of checkout button SBNP1, the other end of resistance R1 connects the negative pole of diode D1, the negative pole of the positive pole connecting luminous diode LED1 of diode D1, the other end contact resistance R2 of relay J 3 normally opened contact, the other end of resistance R2 connects the negative pole of diode D2, the negative pole of the positive pole connecting luminous diode LED2 of diode D2, the positive pole of the zero line N2 connecting luminous diode LED1 of single-phase tripolar plug CHT1, the positive pole of LED 2, the other end of resistance R3, the zero line N3 of common single-phase three pole socket CHZ2, run through the other end of connection transformer BT armature winding BL3 and the zero line N4 of single-phase three pole socket CHZ3 and instrument connection CS3 after zero-sequence transformer BL2, switch contact A2 connects the sliding point of the potentiometer WR1 other end and potentiometer WR1, in earth leakage circuit-breaker RCD2, zero-sequence transformer BL2 coil two extension lines connect two input ends of amplification control circuit Q2, amplification control circuit Q2 exports one end and connects trip switch J2 coil, amplification control circuit Q2 exports the other end that the other end connects trip switch J2 coil, diode D1 and diode D2 is for improving the breakdown reverse voltage of LED 1 and LED 2.
Fig. 2 is safety ground general-purpose on-line detector circuit theory schematic diagram two, circuit implementation installs intelligent digital corollary apparatus additional on safety ground general-purpose on-line detector circuit theory schematic diagram one, particular circuit configurations is that intelligent digital corollary apparatus is by processor of single chip computer CPU, analog-digital conversion a/d 1, analog-digital conversion a/d 2, analog-digital conversion a/d 3, isolating amplifier circuit Q3, isolating amplifier circuit Q4, isolating amplifier circuit Q5 forms, ground wire between the switch contact A0 of switch ZK1 and transformer BT secondary coil BL4 runs through current transformer BL5, gather the electric current of safety line, current transformer BL5 coil two ends connect two input ends of isolating amplifier circuit Q3 respectively, the output terminal connection mode number conversion A/D1 input end of isolating amplifier circuit Q3, analog-digital conversion a/d 1 output terminal connects display and the process that processor of single chip computer CPU carries out testing ground current, the two input ends connecting test hole CS1 and instrument connection CS2 respectively of isolating amplifier circuit Q4, the output terminal connection mode number conversion A/D2 input end of isolating amplifier circuit Q4, analog-digital conversion a/d 2 output terminal connects processor of single chip computer CPU and shows voltage signal change and process, instrument connection CS2 and instrument connection CS4 connect two input ends of isolating amplifier circuit Q5 respectively, the output terminal connection mode number conversion A/D3 input end of isolating amplifier circuit Q5, analog-digital conversion a/d 3 output terminal connects processor of single chip computer CPU and carries out detection display process to equipotential, processor of single chip computer CPU has display translation interface XS, printout interface DY, communication exports TX interface.
Fig. 3 is safety ground general-purpose on-line detector circuit theory schematic diagram three, circuit implementation adopts conventional electrical appliance relay protection and control, particular circuit configurations is the ground wire PE22 connecting test hole CS21 of single-phase tripolar plug CHT21, the ground wire PE23 of common single-phase three pole socket CHZ22, potentiometer WR21, self-inspection button SB and relay J 22 coil, the relay J 22 coil other end connects the switch contact A21 of switch ZK22, switch contact A23 connection transformer BT21 secondary winding BL23, the other end of transformer BT21 secondary winding BL23 connects the other end of self-inspection button SB, the ground wire PE24 of instrument connection CS22 and single-phase three pole socket CHZ23, the other end of potentiometer WR21 is connected the switch contact A22 of switch ZK22 with the sliding point of potentiometer WR1, the live wire L22 of single-phase tripolar plug CHT21 is through overcurrent fuse RD21 contact resistance R21, checkout button SBNP21 and power switch K21, the other end contact resistance R23 of checkout button SBNP21, the other end of resistance R21 connects the negative pole of diode D21, the negative pole of the positive pole connecting luminous diode LED21 of diode D21, the other end of power switch K21 connects the live wire L23 of common single-phase three pole socket CHZ22, resistance R22, to release the button the normally opened contact of QSB and contactor KM, the other end of resistance R22 connects the negative pole of diode D22, the negative pole of the positive pole connecting luminous diode LED22 of diode D22, the other end of QSB of releasing the button connects and turns off button TSB, the other end of contactor KM normally opened contact, the live wire L24 of single-phase three end socket CHZ23 and transformer BT21 armature winding BL22, the other end closing disconnecting button TSB connects the normally closed contact of relay J 22, the normally closed contact other end of relay J 22 connects contactor KM coil, the zero line N22 of single-phase tripolar plug CHT21 connects the other end of contactor KM coil, the other end of resistance R23, the positive pole of LED 21, the positive pole of LED 22, the zero line N23 of common single-phase three pole socket CHZ22, instrument connection CS23, the other end of transformer BT21 armature winding BL22 and the zero line N24 of single-phase three pole socket CHZ23.
Detection method is illustrated:
1. users that illustrate single-phase three pole socket CHZ1 and user's earth leakage circuit-breaker RCD1 are detected objects, and being also online power supply, is the electrical appliance of substantial amounts, can carry out comprehensive safety detection with safety ground general-purpose on-line detector of the present invention to it.Its step:
1.. single-phase tripolar plug CHT1 inserts user single-phase three pole socket CHZ1, switch contact A0 and switch contact A1 and connects, and turns on the power switch K switch 1;
2.. with test pencil checkout can determine single phase poaer supply zero line N and single phase poaer supply live wire L position whether normal;
3.. LED 1 is bright, illustrates whether single-phase three pole socket CHZ1 have electricity;
4.. press checkout button SBNP1, user's earth leakage circuit-breaker RCD1 does not trip proves that the single-phase three pole socket CHZ1 wiring of user are correct, if user's earth leakage circuit-breaker RCD1 trips, power-off proves zero line N1 and the ground wire PE0 misconnection of the single-phase three pole socket CHZ1 of user, and the selection of resistance R3 resistance must make to be greater than 30mA by the electric current of resistance R3;
5.. close earth leakage circuit-breaker RCD2, relay J 3 normally opened contact is connected, LED 2 is bright, illustrate that safety ground earth leakage protection controls formula general-purpose on-line detector normal, at this moment contacted with electrical appliance ground wire place by instrument connection CS2 with wire, disconnect if earth leakage circuit-breaker RCD2 trips, LED 2 goes out, illustrate that the single-phase three pole socket CHZ1 protective earths of user are normal, otherwise prove there is no protective earth or interruption;
6.. with wire, instrument connection CS2 is contacted with instrument connection CS3, earth leakage circuit-breaker RCD2 and user's earth leakage circuit-breaker RCD1 does not trip, with wire, instrument connection CS2 is contacted with electrical appliance ground wire place again, earth leakage circuit-breaker RCD2 and user's earth leakage circuit-breaker RCD1 trips disconnection, LED 1 and LED 2 go out entirely, illustrate that the single phase poaer supply zero line N1 of single-phase three pole socket CHZ1 and ground wire PE1 connects single-phase three pole socket CHZ1 and do not have ground connection;
7.. switch contact A0 and switch contact A2 connects; the sliding point of potentiometer WR1 is transferred to minimum resistance position; contacted with instrument connection CS3 by instrument connection CS2 with wire, user's earth leakage circuit-breaker RCD1 does not trip, and illustrates that user does not install user's earth leakage protection.
To illustrate 2. pairs of consumer ground connection, anti-lightning strike ground connection (lightning rod) and should the earthing detection of metal object of ground connection: switch contact A0 and switch contact A1 connects, with wire, instrument connection CS2 is contacted with tested metal object, earth leakage circuit-breaker RCD2 trips disconnection, illustrate that tested metal object protective earth is normal, otherwise prove there is no protective earth or interruption;
The 3. switch contact A0 and switch contact A2 that illustrate connect; with wire, instrument connection CS2 is connected with instrument connection CS3; when adjustment potentiometer WR1 makes display measurement electric current reach 30mA, user's earth leakage circuit-breaker RCD1 tripping operation disconnects; meet the numerical value that earth leakage protection specifies, if user's earth leakage circuit-breaker RCD1 display measurement electric current tripped when disconnecting be greater than 30mA too many time prove that user earth leakage circuit-breaker RCD1 does not have safeguard protection effect.
Claims (3)
1. a safety ground general-purpose on-line detector, it is characterized in that on safety line, utilize the low-voltage of transformer secondary output winding as sensed signal sources, the safety ground effect of complete detection user ground wire is used for this, single-phase tripolar plug CHT1 inserts in the single-phase three pole socket CHZ1 of user, series transformer BT secondary winding BL4 on ground wire after running through zero-sequence transformer BL2, transformer BT armature winding BL3 connects alternating current 220V power supply, by the diverse location of switch ZK1, the safety ground of consumer and related ground parameter are quantitatively detected, judge the safety ground effect of detected object with this comprehensively, user single-phase three pole socket CHZ1 and user's earth leakage circuit-breaker RCD1 are detected objects, also be the working power of safety ground general-purpose on-line detector, particular circuit configurations is the ground wire PE2 connecting test hole CS1 of single-phase tripolar plug CHT1, the ground wire PE3 of common single-phase three pole socket CHZ2, potentiometer WR1 with run through zero-sequence transformer BL2 after be connected the switch contact A1 of switch ZK1, the secondary winding BL4 of switch contact A0 connection transformer BT and relay J 3 coil, the other end of transformer BT secondary winding BL4 connects the other end of relay J 3 coil and the ground wire PE4 of single-phase three pole socket CHZ3 and instrument connection CS2, the live wire L2 of single-phase tripolar plug CHT1 connects power switch K1 through overcurrent fuse RD1, the power switch K1 other end connects checkout button SBNP1, resistance R1, the normally opened contact of relay J 3, the common single-phase live wire L3 of three pole socket CHZ2 and the trip switch J2 of earth leakage circuit-breaker RCD2, the single-phase live wire L4 of three pole socket CHZ3 and the armature winding BL3 of transformer BT is connected after the other end of trip switch J2 runs through zero-sequence transformer BL2, the other end contact resistance R3 of checkout button SBNP1, the other end of resistance R1 connects the negative pole of diode D1, the negative pole of the positive pole connecting luminous diode LED1 of diode D1, the other end contact resistance R2 of relay J 3 normally opened contact, the other end of resistance R2 connects the negative pole of diode D2, the negative pole of the positive pole connecting luminous diode LED2 of diode D2, the positive pole of the zero line N2 connecting luminous diode LED1 of single-phase tripolar plug CHT1, the positive pole of LED 2, the other end of resistance R3, the zero line N3 of common single-phase three pole socket CHZ2, run through the other end of connection transformer BT armature winding BL3 and the zero line N4 of single-phase three pole socket CHZ3 and instrument connection CS3 after zero-sequence transformer BL2, switch contact A2 connects the sliding point of the potentiometer WR1 other end and potentiometer WR1, in earth leakage circuit-breaker RCD2, zero-sequence transformer BL2 coil two extension lines connect two input ends of amplification control circuit Q2, amplification control circuit Q2 exports one end and connects trip switch J2 coil, amplification control circuit Q2 exports the other end that the other end connects trip switch J2 coil, diode D1 and diode D2 is for improving the breakdown reverse voltage of LED 1 and LED 2.
2. a kind of safety ground general-purpose on-line detector according to claim 1, it is characterized in that installing intelligent digital corollary apparatus additional on safety ground general-purpose on-line detector, particular circuit configurations is that intelligent digital corollary apparatus is by processor of single chip computer CPU, analog-digital conversion a/d 1, analog-digital conversion a/d 2, analog-digital conversion a/d 3, isolating amplifier circuit Q3, isolating amplifier circuit Q4, isolating amplifier circuit Q5 forms, ground wire between the switch contact AO of switch ZK1 and transformer BT secondary coil BL4 runs through current transformer BL5, gather the electric current of safety line, current transformer BL5 coil two ends connect two input ends of isolating amplifier circuit Q3 respectively, the output terminal connection mode number conversion A/D1 input end of isolating amplifier circuit Q3, analog-digital conversion a/d 1 output terminal connects display and the process that processor of single chip computer CPU carries out testing ground current, the two input ends connecting test hole CS1 and instrument connection CS2 respectively of isolating amplifier circuit Q4, the output terminal connection mode number conversion A/D2 input end of isolating amplifier circuit Q4, analog-digital conversion a/d 2 output terminal connects processor of single chip computer CPU and shows voltage signal change and process, instrument connection CS2 and instrument connection CS4 connect two input ends of isolating amplifier circuit Q5 respectively, the output terminal connection mode number conversion A/D3 input end of isolating amplifier circuit Q5, analog-digital conversion a/d 3 output terminal connects processor of single chip computer CPU and carries out detection display process to equipotential, processor of single chip computer CPU has display translation interface XS, printout interface DY, communication exports TX interface.
3. a safety ground general-purpose on-line detector, it is characterized in that this safety ground general-purpose on-line detector is that conventional electrical appliance relay controls, particular circuit configurations is the ground wire PE22 connecting test hole CS21 of single-phase tripolar plug CHT21, the ground wire PE23 of common single-phase three pole socket CHZ22, potentiometer WR21, self-inspection button SB and relay J 22 coil, the relay J 22 coil other end connects the switch contact A21 of switch ZK22, switch contact A23 connection transformer BT21 secondary winding BL23, the other end of transformer BT21 secondary winding BL23 connects the other end of self-inspection button SB, the ground wire PE24 of instrument connection CS22 and single-phase three pole socket CHZ23, the other end of potentiometer WR21 is connected the switch contact A22 of switch ZK22 with the sliding point of potentiometer WR1, the live wire L22 of single-phase tripolar plug CHT21 is through overcurrent fuse RD21 contact resistance R21, checkout button SBNP21 and power switch K21, the other end contact resistance R23 of checkout button SBNP21, the other end of resistance R21 connects the negative pole of diode D21, the negative pole of the positive pole connecting luminous diode LED21 of diode D21, the other end of power switch K21 connects the live wire L23 of common single-phase three pole socket CHZ22, resistance R22, to release the button the normally opened contact of QSB and contactor KM, the other end of resistance R22 connects the negative pole of diode D22, the negative pole of the positive pole connecting luminous diode LED22 of diode D22, the other end of QSB of releasing the button connects and turns off button TSB, the other end of contactor KM normally opened contact, the live wire L24 of single-phase three end socket CHZ23 and transformer BT21 armature winding BL22, the other end closing disconnecting button TSB connects the normally closed contact of relay J 22, the normally closed contact other end of relay J 22 connects contactor KM coil, the zero line N22 of single-phase tripolar plug CHT21 connects the other end of contactor KM coil, the other end of resistance R23, the positive pole of LED 21, the positive pole of LED 22, the zero line N23 of common single-phase three pole socket CHZ22, instrument connection CS23, the other end of transformer BT21 armature winding BL22 and the zero line N24 of single-phase three pole socket CHZ23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310189159.8A CN103267923B (en) | 2013-05-10 | 2013-05-10 | Safety ground general-purpose on-line detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310189159.8A CN103267923B (en) | 2013-05-10 | 2013-05-10 | Safety ground general-purpose on-line detector |
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| Publication Number | Publication Date |
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| CN103267923A CN103267923A (en) | 2013-08-28 |
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| CN104914300A (en) * | 2015-05-15 | 2015-09-16 | 大唐韩城第二发电有限责任公司 | Method for improving integrated protection device accident tripping optical isolation acting power |
| CN105891661A (en) * | 2016-06-27 | 2016-08-24 | 国网山东省电力公司博兴县供电公司 | Leakage source finding instrument |
| CN108957217B (en) * | 2018-10-11 | 2021-01-01 | 中车永济电机有限公司 | Control and protection method for AC-DC-AC power supply system |
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| JP2004239863A (en) * | 2003-02-10 | 2004-08-26 | Life Technos:Kk | Grounding method for transformer |
| CN2624215Y (en) * | 2003-06-04 | 2004-07-07 | 秦永刚 | Intelligent digital display pocket leakage current protector detector |
| JP2010217019A (en) * | 2009-03-17 | 2010-09-30 | Life Technos:Kk | Insulation grounding monitoring device |
| CN103034272B (en) * | 2012-12-11 | 2015-03-25 | 瑞安市工泰电器有限公司 | Electricity intelligent measuring and controlling device |
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