CN103267923A - Safety grounding all-purpose online detector - Google Patents
Safety grounding all-purpose online detector Download PDFInfo
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Abstract
The invention relates to the field of low-voltage power supply system grounding detection. Ensuring safety grounding of equipment is an important technical measure to ensure safety in utilization of electric power. The invention aims at providing a safety grounding all-purpose online detector. The safety grounding all-purpose online detector is characterized in that a low voltage is applied to safety grounding through utilization of a transformer secondary winding, the safety grounding all-purpose online detector and user earth leakage protection are combined to form composite dual earth leakage protection to be used for detecting a safety grounding effect of a user ground lead in a comprehensive mode, the safety grounding all-purpose online detector has a comprehensive detection function of detecting a correct connection method, a grounding current, a grounding resistor and the like of safety grounding, the safety grounding all-purpose online detector can detect the safety grounding of electricity supplying, electricity utilization, commercial residential buildings, residence communities, independent residents and the like, and can detect the safety grounding of lightning protection equipment, electric equipment and the like, and the safety utilization of the electric power is guaranteed. The safety grounding all-purpose online detector has the advantages of being simple in circuit, low in cost, easy to install and convenient to operate, and has much practical value.
Description
Technical field
The present invention relates to low-voltage power supply system ground connection detection range, particularly safety ground general-purpose on-line detector.
Background technology
Low-voltage power supply system is contained and is all used 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 of guaranteeing safety utilization of electric power.But someone thinks that 380/220 volt of low-voltage power supply voltage is not very high, awareness of safety is Strong not, lack safety utilization of electric power general knowledge again, arbitrarily backguy connects, wrong ground wire and miss operations lack of standardization such as ground wire, make consumer have essential safety hidden danger, mostly occur in this field so the accident of person electric shock takes place.How to find to detect the potential safety hazard of consumer, lack simple and effective means and method at present.The simplest 220 volts of single-phase three pole sockets for example, because to be protection against electric shock jack slit little and baffle plate is housed for existing socket, test pencil or universal electric meter indicator are difficult for injecting, even take socket apart and could check, so, even if see that with eyes it is unscientific having ground wire qualified, as separated in the ground connection or loose contact or the unearthed line of the other end, ground connection just is equal to nothing.These all prove anxious must judge the security of consumer and the reliability of earth system by a kind of easy multi-functional on-line detector at present, to eliminate safe hidden trouble, stops the generation of accident.
Summary of the invention
The objective of the invention is at above-mentioned defective, a kind of safety requirements, easy and simple to handle that satisfies is provided, can detect the safety ground general-purpose on-line detector of judging the consumer security performance.
Technical scheme of the present invention is safety ground general-purpose on-line detector; comprise safety ground earth leakage protection control formula general-purpose on-line detector; it is characterized in that utilizing the transformer secondary output winding to apply low-voltage at safety line; safety ground general-purpose on-line detector and user's earth leakage protection are formed Composite Double earth leakage protection; be used for the safety ground effect of complete detection user ground wire with this; single-phase three-terminal polarized plus plug CHT1 inserts among the single-phase three pole socket CHZ1 of user; series transformer BT secondary winding BL4 on the ground wire after running through zero-sequence transformer BL2; the elementary winding BL3 of transformer BT connection～220V power supply; diverse location by switch ZK1 quantitatively detects the safety ground of consumer or electrical appliance and the ground connection parameter of being correlated with; judge the safety ground effect of detected object with this comprehensively; the single-phase three pole socket CHZ1 of user and user's earth leakage circuit-breaker RCD1 are detected objects; it also is safety ground earth leakage protection control formula general-purpose on-line detector working power; particular circuit configurations is that the ground wire PE2 of single-phase three-terminal polarized plus plug CHT1 connects instrument connection CS1; 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; switch contact a0 connects secondary winding BL4 and relay J 3 coils of transformer BT; the other end of transformer BT secondary winding BL4 connects the other end of relay J 3 coils and ground wire PE4 and the instrument connection CS2 of the single-phase three pole socket CHZ3 of specific function; the live wire L2 of single-phase three-terminal polarized plus plug CHT1 connects power switch K1 through overcurrent fuse RD1; the power switch K1 other end connects checkout button SBNP1; resistance R 1; the normally opened contact of relay J 3; the dropout switch J2 of the live wire L3 of common single-phase three pole socket CHZ2 and earth leakage circuit-breaker RCD2; the other end of dropout switch J2 connects the live wire L4 of the single-phase three pole socket CHZ3 of specific function and the elementary winding BL3 of transformer BT after running through zero-sequence transformer BL2; the other end of checkout button SBNP1 connects resistance R 3; the other end of resistance R 1 connects the negative pole of diode D1; the positive pole of diode D1 connects the negative pole of LED 1; the other end of relay J 3 normally opened contacts connects resistance R 2; the other end of resistance R 2 connects the negative pole of diode D2; the positive pole of diode D2 connects the negative pole of LED 2; the zero line N2 of single-phase three-terminal polarized plus plug CHT1 connects the positive pole of LED 1; the positive pole of LED 2; the other end of resistance R 3; the zero line N3 of common single-phase three pole socket CHZ2; connect the other end of the elementary winding BL3 of transformer BT and zero line N4 and the instrument connection CS3 of the single-phase three pole socket CHZ3 of specific function after running through zero-sequence transformer BL2; switch contact a2 connects the sliding point of the potentiometer WR1 other end and potentiometer WR1; two extension lines of zero-sequence transformer BL2 coil connect two input ends of amplification control circuit Q2 among the earth leakage circuit-breaker RCD2; amplification control circuit Q2 exports an end and connects dropout switch J2 coil; the amplification control circuit Q2 output other end connects the other end of dropout switch J2 coil; diode D1 and diode D2 be used for to improve the breakdown reverse voltage of LED 1 and LED 2, and the current limliting resistance of resistance R 1 and resistance R 2 enough can be without diode D1 and diode D2 greatly the time.
Described safety ground general-purpose on-line detector; comprise safety ground intelligent digital formula general-purpose on-line detector; it is characterized in that installing intelligent digital corollary apparatus ZCY additional at safety ground earth leakage protection control formula general-purpose on-line detector; particular circuit configurations is that intelligent digital corollary apparatus ZCY is by processor of single chip computer CPU; A/D1 is changed in the modulus change; A/D2 is changed in the modulus change; A/D3 is changed in the modulus change; isolating amplifier circuit Q3; isolating amplifier circuit Q4; isolating amplifier circuit Q5 forms; ground wire between the switch contact a0 of switch ZK1 and the 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 of isolating amplifier circuit Q3 connects the modulus change and changes the A/D1 input end; analog-digital conversion a/d 1 output terminal connects demonstration and the processing that processor of single chip computer CPU tests ground current; relay J 3 coil two ends connect two input ends of isolating amplifier circuit Q4 respectively; the output terminal of isolating amplifier circuit Q4 connects the modulus change and changes the A/D2 input end; the operation voltage signal variation of analog-digital conversion a/d 2 output terminals connection processor of single chip computer CPU shows and handles; instrument connection CS2 and instrument connection CS4 connect two input ends of isolating amplifier circuit Q5 respectively; the output terminal of isolating amplifier circuit Q5 connects the modulus change and changes the A/D3 input end; the equipotential of processor of single chip computer CPU that connects analog-digital conversion a/d 3 output terminals detects and shows that processing, processor of single chip computer CPU have the output interface of demonstration XS; printout interface DY; communication output TX interface.
Described safety ground general-purpose on-line detector; comprise safety ground relay control formula general-purpose on-line detector; it is characterized in that adopting conventional electrical appliance relay protection control; single-phase three-terminal polarized plus plug CHT21 inserts among the single-phase three pole socket CHZ1 of user; safety ground to single-phase three pole sockets of user and consumer detects; particular circuit configurations is that the ground wire PE22 of single-phase three-terminal polarized plus plug CHT21 connects instrument connection CS21; the ground wire PE23 of common single-phase three pole socket CHZ22; potentiometer WR21; self check button SB and relay J 22 coils; the relay J 22 coil other ends connect the switch contact a21 of switch ZK22; switch contact a23 connects transformer BT21 secondary winding BL23; the other end of transformer BT21 secondary winding BL23 connects the other end of self check button SB; the ground wire PE24 of the single-phase three pole socket CHZ23 of instrument connection CS22 and specific function; the sliding point of the other end of potentiometer WR21 and potentiometer WR1 is connected the switch contact a22 of switch ZK22; the live wire L22 of single-phase three-terminal polarized plus plug CHT21 connects resistance R 21 through overcurrent fuse RD21; checkout button SBNP21 and power switch K21; the other end of checkout button SBNP21 connects resistance R 23; the other end of resistance R 21 connects the negative pole of diode D21; the positive pole of diode D21 connects the negative pole of LED 21; the other end of power switch K21 connects the live wire L23 of common single-phase three pole socket CHZ22; resistance R 22; the release the button normally opened contact of QSB and contactor KM; the other end of resistance R 22 connects the negative pole of diode D22; the positive pole of diode D22 connects the negative pole of LED 22; the other end of QSB of releasing the button connect to turn-off button TSB; the other end of contactor KM normally opened contact; the live wire L24 of the single-phase three end socket CHZ23 of specific function and the elementary winding BL22 of transformer BT21; the other end that closes 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, and the zero line N22 of single-phase three-terminal polarized plus plug CHT21 connects the other end of contactor KM coil; the other end of resistance R 23; 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 zero line N24 of the single-phase three pole socket CHZ23 of the other end of the elementary winding BL22 of transformer BT21 and specific function.
Safety ground general-purpose on-line detector of the present invention has the function of complete detection such as correct connection to safety ground, ground current, stake resistance, can the stake resistance of safety grounds such as the safety ground of power supply, electricity consumption, the commercial house, residential quarters, independent resident family etc., lightning-arrest, consumer be detected, guarantee safety utilization of electric power, circuit of the present invention is simple, cost is low, be easy to install, easy to operate advantage, and is very with practical value.
Description of drawings
Fig. 1 safety ground earth leakage protection control formula general-purpose on-line detector circuit theory synoptic diagram
Fig. 2 safety ground intelligent digital formula general-purpose on-line detector circuit theory synoptic diagram
Fig. 3 safety ground relay control formula general-purpose on-line detector circuit theory synoptic diagram
Single-phase three pole sockets of CHZ1 user among Fig. 1; common single-phase three pole sockets of CHZ2; single-phase three pole sockets of CHZ3 specific function; the single-phase three-terminal polarized plus plug of CHT1; RCD1 user's earth leakage circuit-breaker; the RCD2 earth leakage circuit-breaker; J1-J2 dropout switch; the J3 relay; the Q1-Q2 amplification control circuit; the BL1-BL2 zero-sequence transformer; the BT transformer; the elementary winding of BL3; the 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; the PE0-PE4 ground wire; the RD1 fuse; the K1 power switch; the SBNP1 checkout button; the LED1-LED2 light emitting diode; the D1-D2 diode; R1-R3 resistance; the WR1 potentiometer; the ZK1 switch; a0-a2 switch contact; the CS1-CS3 instrument connection.
ZCY intelligent digital corollary apparatus among Fig. 2, Q3-Q4 isolating amplifier circuit, A/D1-A/D2 analog to digital conversion, CPU processor of single chip computer, XS show output, DY printout, TX communication output, BL5 current transformer, CS4 instrument connection (other with Fig. 1 in identical).
Single-phase three pole sockets of CHZ21 user among Fig. 3; common single-phase three pole sockets of CHZ22; single-phase three pole sockets of CHZ23 specific function; the single-phase three-terminal polarized plus plug of CHT21; RCD21 user's earth leakage circuit-breaker; J21 dropout switch; the J22 relay; the Q21 amplification control circuit; the 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; the PE20-PE24 ground wire; the RD21 fuse; the K21 power switch; the LED21-LED22 light emitting diode; the D21-D22 diode; R21-R23 resistance; the WR21 potentiometer; the ZK22 switch; a21-a23 switch contact; the BT21 transformer; the elementary winding of BL22; the BL23 secondary winding; the SBNP21 checkout button; SB self check button; QSB releases the button; TSB turn-offs button; the KM contactor; the CS1-CS3 instrument connection.
Embodiment
Safety ground general-purpose on-line detector comprises safety ground earth leakage protection control formula general-purpose on-line detector, safety ground intelligent digital formula general-purpose on-line detector, safety ground relay control formula general-purpose on-line detector; can use various housing or existing various slotting Xiao's plate housing, the embodiment of particular circuit configurations is:
Fig. 1 is safety ground earth leakage protection control formula general-purpose on-line detector circuit theory synoptic diagram; the circuit embodiment is that the ground wire PE2 of single-phase three-terminal polarized plus plug CHT1 connects instrument connection CS1; 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; switch contact a0 connects secondary winding BL4 and relay J 3 coils of transformer BT; the other end of transformer BT secondary winding BL4 connects the other end of relay J 3 coils and ground wire PE4 and the instrument connection CS2 of the single-phase three pole socket CHZ3 of specific function; the live wire L2 of single-phase three-terminal polarized plus plug CHT1 connects power switch K1 through overcurrent fuse RD1; the power switch K1 other end connects checkout button SBNP1; resistance R 1; the normally opened contact of relay J 3; the dropout switch J2 of the live wire L3 of common single-phase three pole socket CHZ2 and earth leakage circuit-breaker RCD2; the other end of dropout switch J2 connects the live wire L4 of the single-phase three pole socket CHZ3 of specific function and the elementary winding BL3 of transformer BT after running through zero-sequence transformer BL2; the other end of checkout button SBNP1 connects resistance R 3; the other end of resistance R 1 connects the negative pole of diode D1; the positive pole of diode D1 connects the negative pole of LED 1; the other end of relay J 3 normally opened contacts connects resistance R 2; the other end of resistance R 2 connects the negative pole of diode D2; the positive pole of diode D2 connects the negative pole of LED 2; the zero line N2 of single-phase three-terminal polarized plus plug CHT1 connects the positive pole of LED 1; the positive pole of LED 2; the other end of resistance R 3; the zero line N3 of common single-phase three pole socket CHZ2; connect the other end of the elementary winding BL3 of transformer BT and zero line N4 and the instrument connection CS3 of the single-phase three pole socket CHZ3 of specific function after running through zero-sequence transformer BL2; switch contact a2 connects the sliding point of the potentiometer WR1 other end and potentiometer WR1; two extension lines of zero-sequence transformer BL2 coil connect two input ends of amplification control circuit Q2 among the earth leakage circuit-breaker RCD2; amplification control circuit Q2 exports an end and connects dropout switch J2 coil; the amplification control circuit Q2 output other end connects the other end of dropout switch J2 coil; diode D1 and diode D2 be used for to improve the breakdown reverse voltage of LED 1 and LED 2, and the current limliting resistance of resistance R 1 and resistance R 2 enough can be without diode D1 and diode D2 greatly the time.
Fig. 2 is safety ground intelligent digital formula general-purpose on-line detector circuit theory synoptic diagram; the circuit embodiment is to install intelligent digital corollary apparatus ZCY additional at safety ground earth leakage protection control formula general-purpose on-line detector; particular circuit configurations is that intelligent digital corollary apparatus XCY is by processor of single chip computer CPU; A/D1 is changed in the modulus change; A/D2 is changed in the modulus change; A/D3 is changed in the modulus change; isolating amplifier circuit Q3; isolating amplifier circuit Q4; isolating amplifier circuit Q5 forms; ground wire between the switch contact a0 of switch ZK1 and the 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 of isolating amplifier circuit Q3 connects the modulus change and changes the A/D1 input end; analog-digital conversion a/d 1 output terminal connects demonstration and the processing that processor of single chip computer CPU tests ground current; relay J 3 coil two ends connect two input ends of isolating amplifier circuit Q4 respectively; the output terminal of isolating amplifier circuit Q4 connects the modulus change and changes the A/D2 input end; the operation voltage signal variation of analog-digital conversion a/d 2 output terminals connection processor of single chip computer CPU shows and handles; instrument connection CS2 and instrument connection CS4 connect two input ends of isolating amplifier circuit Q5 respectively; the output terminal of isolating amplifier circuit Q5 connects the modulus change and changes the A/D3 input end; the equipotential of processor of single chip computer CPU that connects analog-digital conversion a/d 3 output terminals detects and shows that processing, processor of single chip computer CPU have the output interface of demonstration XS; printout interface DY; communication output TX interface.
Fig. 3 is safety ground relay control formula general-purpose on-line detector circuit theory synoptic diagram; the circuit embodiment is to adopt conventional electrical appliance relay protection control; particular circuit configurations is that the ground wire PE22 of single-phase three-terminal polarized plus plug CHT21 connects instrument connection CS21; the ground wire PE23 of common single-phase three pole socket CHZ22; potentiometer WR21; self check button SB and relay J 22 coils; the relay J 22 coil other ends connect the switch contact a21 of switch ZK22; switch contact a23 connects transformer BT21 secondary winding BL23; the other end of transformer BT21 secondary winding BL23 connects the other end of self check button SB; the ground wire PE24 of the single-phase three pole socket CHZ23 of instrument connection CS22 and specific function; the sliding point of the other end of potentiometer WR21 and potentiometer WR1 is connected the switch contact a22 of switch ZK22; the live wire L22 of single-phase three-terminal polarized plus plug CHT21 connects resistance R 21 through overcurrent fuse RD21; checkout button SBNP21 and power switch K21; the other end of checkout button SBNP21 connects resistance R 23; the other end of resistance R 21 connects the negative pole of diode D21; the positive pole of diode D21 connects the negative pole of LED 21; the other end of power switch K21 connects the live wire L23 of common single-phase three pole socket CHZ22; resistance R 22; the release the button normally opened contact of QSB and contactor KM; the other end of resistance R 22 connects the negative pole of diode D22; the positive pole of diode D22 connects the negative pole of LED 22; the other end of QSB of releasing the button connect to turn-off button TSB; the other end of contactor KM normally opened contact; the live wire L24 of the single-phase three end socket CHZ23 of specific function and the elementary winding BL22 of transformer BT21; the other end that closes 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, and the zero line N22 of single-phase three-terminal polarized plus plug CHT21 connects the other end of contactor KM coil; the other end of resistance R 23; 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 zero line N24 of the single-phase three pole socket CHZ23 of the other end of the elementary winding BL22 of transformer BT21 and specific function.
Detection method is given an example:
For example the single-phase three pole socket CHZ1 of 1. users and user's earth leakage circuit-breaker RCD1 are detected objects, also are online power supplys, are the huge electrical appliances of quantity, can carry out comprehensive safety detection to it with this.Its step:
1.. single-phase three-terminal polarized plus plug CHT1 inserts the single-phase three pole socket CHZ1 of user, and switch contact a0 and switch contact a1 connect, and turn on the power switch K switch 1;
2.. LED 1 is bright or do not work, and illustrates whether the single-phase three pole socket CHZ1 of user have;
3.. 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 zero line N1 and the ground wire PEO misconnection of the single-phase three pole socket CHZ1 of user's earth leakage circuit-breaker RCD1 tripping operation outage proof user, the selection of resistance R 3 resistances must make electric current by resistance R 3 greater than 30mA;
4. can determine with the test pencil checkout whether single phase poaer supply zero line N and single phase poaer supply live wire L position be normal;
5.. earth leakage circuit-breaker RCD2 closes, relay J 3 normally opened contacts are connected, LED 2 is bright, illustrate that safety ground earth leakage protection control formula general-purpose on-line detector is normal, at this moment with lead instrument connection CS2 is contacted with electrical appliance ground wire place, if earth leakage circuit-breaker RCD2 tripping operation disconnects, LED 2 goes out, illustrate that the single-phase three pole socket CHZ1 protective earths of user are normal, otherwise proof there are not protective earth or interruption;
6.. with lead instrument connection CS2 is contacted with instrument connection CS3, earth leakage circuit-breaker RCD2 and user's earth leakage circuit-breaker RCD1 do not trip, with lead instrument connection CS2 is contacted with electrical appliance ground wire place again, earth leakage circuit-breaker RCD2 and the user's earth leakage circuit-breaker RCD1 disconnection of all tripping, LED 1 and LED 2 go out entirely, single phase poaer supply zero line N1 and ground wire PE1 that single-phase three pole socket CHZ1 are described connect, and ground wire PE1 does not have on the spot ground connection in addition;
7.. switch contact a0 and switch contact a2 connect; the sliding point of potentiometer WR1 is transferred to the minimum resistance position; with lead instrument connection CS2 is contacted with instrument connection CS3, user's earth leakage circuit-breaker RCD1 does not trip, and illustrates that the user does not install user's earth leakage protection.
For example the ground connection of the 2. pairs of consumer ground connection, anti-lightning strike ground connection (lightning rod) and metal object that should ground connection is detected: switch contact a0 and switch contact a1 connection, with lead instrument connection CS2 is contacted with tested metal object, the earth leakage circuit-breaker RCD2 disconnection of tripping, illustrate that tested metal object protective earth is normal, otherwise proof there are not protective earth or interruption;
3. single-phase three-terminal polarized plus plug CHT1 insert near the single-phase three pole socket CHZ1 of user of measured object for example, switch contact a0 and switch contact a2 connect, with lead instrument connection CS1 is connected with instrument connection CS2, data by current transformer BL5 and transformer BT secondary winding BL4 enter intelligent digital corollary apparatus ZCY carries out processes and displays and measures electric current, voltage and stake resistance, determines with this whether safety ground standard and safety ground meet standard.
4. switch contact a0 and switch contact a2 connect for example; with lead instrument connection CS2 is connected with instrument connection CS3; adjustment potentiometer WR1 makes and shows that user's earth leakage circuit-breaker RCD1 tripping operation disconnected when measuring electric current reached 30mA; the numerical value that meets earth leakage protection regulation, if the demonstration when user's earth leakage circuit-breaker RCD1 tripping operation disconnects measure electric current when too many greater than 30mA proof user earth leakage circuit-breaker RCD1 do not have the safeguard protection effect.
Claims (3)
1. safety ground general-purpose on-line detector; comprise safety ground earth leakage protection control formula general-purpose on-line detector; it is characterized in that utilizing the transformer secondary output winding to apply low-voltage at safety line; safety ground general-purpose on-line detector and user's earth leakage protection are formed Composite Double earth leakage protection; be used for the safety ground effect of complete detection user ground wire with this; single-phase three-terminal polarized plus plug CHT1 inserts among the single-phase three pole socket CHZ1 of user; series transformer BT secondary winding BL4 on the ground wire after running through zero-sequence transformer BL2; the elementary winding BL3 of transformer BT connection～220V power supply; diverse location by switch ZK1 quantitatively detects the safety ground of consumer or electrical appliance and the ground connection parameter of being correlated with; judge the safety ground effect of detected object with this comprehensively; the single-phase three pole socket CHZ1 of user and user's earth leakage circuit-breaker RCD1 are detected objects; it also is safety ground earth leakage protection control formula general-purpose on-line detector working power; particular circuit configurations is that the ground wire PE2 of single-phase three-terminal polarized plus plug CHT1 connects instrument connection CS1; 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; switch contact a0 connects secondary winding BL4 and relay J 3 coils of transformer BT; the other end of transformer BT secondary winding BL4 connects the other end of relay J 3 coils and ground wire PE4 and the instrument connection CS2 of the single-phase three pole socket CHZ3 of specific function; the live wire L2 of single-phase three-terminal polarized plus plug CHT1 connects power switch K1 through overcurrent fuse RD1; the power switch K1 other end connects checkout button SBNP1; resistance R 1; the normally opened contact of relay J 3; the dropout switch J2 of the live wire L3 of common single-phase three pole socket CHZ2 and earth leakage circuit-breaker RCD2; the other end of dropout switch J2 connects the live wire L4 of the single-phase three pole socket CHZ3 of specific function and the elementary winding BL3 of transformer BT after running through zero-sequence transformer BL2; the other end of checkout button SBNP1 connects resistance R 3; the other end of resistance R 1 connects the negative pole of diode D1; the positive pole of diode D1 connects the negative pole of LED 1; the other end of relay J 3 normally opened contacts connects resistance R 2; the other end of resistance R 2 connects the negative pole of diode D2; the positive pole of diode D2 connects the negative pole of LED 2; the zero line N2 of single-phase three-terminal polarized plus plug CHT1 connects the positive pole of LED 1; the positive pole of LED 2; the other end of resistance R 3; the zero line N3 of common single-phase three pole socket CHZ2; connect the other end of the elementary winding BL3 of transformer BT and zero line N4 and the instrument connection CS3 of the single-phase three pole socket CHZ3 of specific function after running through zero-sequence transformer BL2; switch contact a2 connects the sliding point of the potentiometer WR1 other end and potentiometer WR1; two extension lines of zero-sequence transformer BL2 coil connect two input ends of amplification control circuit Q2 among the earth leakage circuit-breaker RCD2; amplification control circuit Q2 exports an end and connects dropout switch J2 coil; the amplification control circuit Q2 output other end connects the other end of dropout switch J2 coil; diode D1 and diode D2 be used for to improve the breakdown reverse voltage of LED 1 and LED 2, and the current limliting resistance of resistance R 1 and resistance R 2 enough can be without diode D1 and diode D2 greatly the time.
2. described safety ground general-purpose on-line detector; comprise safety ground intelligent digital formula general-purpose on-line detector; it is characterized in that installing intelligent digital corollary apparatus ZCY additional at safety ground earth leakage protection control formula general-purpose on-line detector; particular circuit configurations is that intelligent digital corollary apparatus ZCY is by processor of single chip computer CPU; A/D1 is changed in the modulus change; A/D2 is changed in the modulus change; A/D3 is changed in the modulus change; isolating amplifier circuit Q3; isolating amplifier circuit Q4; isolating amplifier circuit Q5 forms; ground wire between the switch contact a0 of switch ZK1 and the 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 of isolating amplifier circuit Q3 connects the modulus change and changes the A/D1 input end; analog-digital conversion a/d 1 output terminal connects demonstration and the processing that processor of single chip computer CPU tests ground current; relay J 3 coil two ends connect two input ends of isolating amplifier circuit Q4 respectively; the output terminal of isolating amplifier circuit Q4 connects the modulus change and changes the A/D2 input end; the operation voltage signal variation of analog-digital conversion a/d 2 output terminals connection processor of single chip computer CPU shows and handles; instrument connection CS2 and instrument connection CS4 connect two input ends of isolating amplifier circuit Q5 respectively; the output terminal of isolating amplifier circuit Q5 connects the modulus change and changes the A/D3 input end; the equipotential of processor of single chip computer CPU that connects analog-digital conversion a/d 3 output terminals detects and shows that processing, processor of single chip computer CPU have the output interface of demonstration XS; printout interface DY; communication output TX interface.
3. described safety ground general-purpose on-line detector; comprise safety ground relay control formula general-purpose on-line detector; it is characterized in that adopting conventional electrical appliance relay protection control; single-phase three-terminal polarized plus plug CHT21 inserts among the single-phase three pole socket CHZ1 of user; safety ground to single-phase three pole sockets of user and consumer detects; particular circuit configurations is that the ground wire PE22 of single-phase three-terminal polarized plus plug CHT21 connects instrument connection CS21; the ground wire PE23 of common single-phase three pole socket CHZ22; potentiometer WR21; self check button SB and relay J 22 coils; the relay J 22 coil other ends connect the switch contact a21 of switch ZK22; switch contact a23 connects transformer BT21 secondary winding BL23; the other end of transformer BT21 secondary winding BL23 connects the other end of self check button SB; the ground wire PE24 of the single-phase three pole socket CHZ23 of instrument connection CS22 and specific function; the sliding point of the other end of potentiometer WR21 and potentiometer WR1 is connected the switch contact a22 of switch ZK22; the live wire L22 of single-phase three-terminal polarized plus plug CHT21 connects resistance R 21 through overcurrent fuse RD21; checkout button SBNP21 and power switch K21; the other end of checkout button SBNP21 connects resistance R 23; the other end of resistance R 21 connects the negative pole of diode D21; the positive pole of diode D21 connects the negative pole of LED 21; the other end of power switch K21 connects the live wire L23 of common single-phase three pole socket CHZ22; resistance R 22; the release the button normally opened contact of QSB and contactor KM; the other end of resistance R 22 connects the negative pole of diode D22; the positive pole of diode D22 connects the negative pole of LED 22; the other end of QSB of releasing the button connect to turn-off button TSB; the other end of contactor KM normally opened contact; the live wire L24 of the single-phase three end socket CHZ23 of specific function and the elementary winding BL22 of transformer BT21; the other end that closes 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, and the zero line N22 of single-phase three-terminal polarized plus plug CHT21 connects the other end of contactor KM coil; the other end of resistance R 23; 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 zero line N24 of the single-phase three pole socket CHZ23 of the other end of the elementary winding BL22 of transformer BT21 and specific function.
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| CN103267923B (en) | 2016-01-20 |
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