CN203616420U - Safety grounding universal on-line detector - Google Patents

Safety grounding universal on-line detector Download PDF

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Publication number
CN203616420U
CN203616420U CN201320278266.3U CN201320278266U CN203616420U CN 203616420 U CN203616420 U CN 203616420U CN 201320278266 U CN201320278266 U CN 201320278266U CN 203616420 U CN203616420 U CN 203616420U
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China
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safety
transformer
connects
grounding
phase
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Expired - Fee Related
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CN201320278266.3U
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Chinese (zh)
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陈可
张振汉
吴辉
陈肖粟
介国安
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Abstract

The utility model relates to the technical field of low-voltage power supply system grounding detection. The safety grounding of the equipment is an important technical measure for ensuring safety electricity consumption. The purpose of the utility model is to provide a safety grounding universal on-line detector which is characterized in that: a low voltage is applied to a safe grounding wire by a transformer secondary winding; a combined dual earth leakage protection is formed by the safety grounding universal on-line detector and the earth leakage protection for users, so that the safety grounding effect of a ground wire of the user can be comprehensively detected. The detector has comprehensive functions of detecting correct connection of safe grounding, grounding current, grounding resistance, etc. The detector can be used for detecting the safety grounding of the safety grounding device, the lightning protection and the electric equipment, etc, of the power supply and consuming equipment, the commercial house, the resident community and the independent household, The detector can perform detection on safety grounding of safety grounding devices, lightning arrestors, electrical devices and the like in power supply equipment, electrical equipment, commercial residential buildings, residence communities, separate residence units and the like, and ensure safe electricity consumption. The detector is simple in circuit structure, low in cost, easy to install and convenient to operate and is of much practical value.

Description

Safety ground general-purpose on-line detector
Technical field
The utility model relates to low-voltage power supply system ground connection 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 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 again safety utilization of electric power general knowledge, arbitrarily bracing wire connects electricity, wrong ground wire and miss the operations lack of standardization such as ground wire, make consumer have essential safety hidden danger, mostly occur in this field so there is the accident of person electric shock.How to find to detect the potential safety hazard of consumer, lack at present simple and effective measure.For example the simplest 220 volts of single-phase three pole sockets, 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 are difficult for injecting, even taking socket apart could check, so, even if see that with eyes it is unscientific having ground wire qualified, as separated in ground connection or loose contact or the unearthed line of the other end, ground connection is just equal to nothing.These all prove that the on-line detector of a kind of Simple multifunction of anxious palpus judges the security of consumer and the reliability of earth system at present, to eliminate safe hidden trouble, stop the generation of accident.
Summary of the invention
The purpose of this utility model is for above-mentioned defect, provides one to meet safety requirements, easy and simple to handle, can detect the safety ground general-purpose on-line detector that judges consumer security performance.
The technical solution of the utility model 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 safety ground earth leakage protection control formula general-purpose on-line detector is on safety line, to utilize transformer secondary output winding to apply low-voltage, safety ground general-purpose on-line detector and user's earth leakage protection composition Composite Double earth leakage protection, be used for the safety ground effect of complete detection user ground wire with this, single-phase tripolar plug CHT1 inserts in the single-phase three pole socket CHZ1 of user, series transformer BT secondary winding BL4 on the ground wire running through after zero-sequence transformer BL2, transformer BT armature winding BL3 connection~220V power supply, safety ground and the relevant ground connection parameter of diverse location by switch ZK1 to consumer or electrical appliance quantitatively detects, 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, also be safety ground earth leakage protection control formula general-purpose on-line detector working power, 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, secondary winding BL4 and relay J 3 coils of switch contact a0 connection 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 tripolar plug CHT1 connects power switch K1 through overcurrent fuse R D1, 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 armature winding BL3 of transformer BT after running through zero-sequence transformer BL2, the other end contact resistance R3 of checkout button SBNP1, the other end of resistance R 1 connects the negative pole of diode D1, the negative pole of the anodal connecting luminous diode LED1 of diode D1, the other end contact resistance R2 of relay J 3 normally opened contacts, the other end of resistance R 2 connects the negative pole of diode D2, the negative pole of the anodal 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 R 3, 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 zero line N4 and the instrument connection CS3 of the single-phase three pole socket CHZ3 of specific function 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, two extension lines of zero-sequence transformer BL2 coil connect two input ends of amplification control circuit Q2, amplification control circuit Q2 output one end 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 are for improving the breakdown reverse voltage of LED 1 and LED 2.
Described safety ground general-purpose on-line detector, it is characterized in that installing intelligent digital corollary apparatus ZCY additional on 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 modulus change, A/D2 is changed in modulus change, A/D3 is changed in modulus change, isolating amplifier circuit Q3, isolating amplifier circuit Q4, isolating amplifier circuit Q5 composition, 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 respectively two input ends of isolating amplifier circuit Q3, the output terminal of isolating amplifier circuit Q3 connects modulus change and changes A/D1 input end, analog-digital conversion a/d 1 output terminal connection processor of single chip computer CPU tests demonstration and the processing of ground current, relay J 3 coil two ends connect respectively two input ends of isolating amplifier circuit Q4, the output terminal of isolating amplifier circuit Q4 connects modulus change and changes A/D2 input end, analog-digital conversion a/d 2 output terminals connect processor of single chip computer CPU operation voltage signal intensity are shown and processed, instrument connection CS2 and instrument connection CS4 connect respectively two input ends of isolating amplifier circuit Q5, the output terminal of isolating amplifier circuit Q5 connects modulus change and changes A/D3 input end, analog-digital conversion a/d 3 output terminals connect processor of single chip computer CPU equipotential are carried out to detection display processing, processor of single chip computer CPU has the output interface of demonstration XS, printout interface DY, communication output TX interface.
Safety ground general-purpose on-line detector described in the utility model has the function of the complete detection such as correct connection to safety ground, ground current, stake resistance, 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 earth leakage protection control formula general-purpose on-line detector circuit theory schematic diagram
Fig. 2 safety ground intelligent digital formula general-purpose on-line detector circuit theory schematic diagram
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 specific function, CHT1 single-phase tripolar plug, RCD1 user's earth leakage circuit-breaker, RCD2 earth leakage circuit-breaker, J1-J2 dropout 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.
In Fig. 2, ZCY intelligent digital corollary apparatus, 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 is identical with Fig. 1).
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; 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 schematic diagram, circuit embodiment 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, secondary winding BL4 and relay J 3 coils of switch contact a0 connection 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 tripolar 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 armature winding BL3 of transformer BT after running through zero-sequence transformer BL2, the other end contact resistance R3 of checkout button SBNP1, the other end of resistance R 1 connects the negative pole of diode D1, the negative pole of the anodal connecting luminous diode LED1 of diode D1, the other end contact resistance R2 of relay J 3 normally opened contacts, the other end of resistance R 2 connects the negative pole of diode D2, the negative pole of the anodal 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 R 3, 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 zero line N4 and the instrument connection CS3 of the single-phase three pole socket CHZ3 of specific function 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, two extension lines of zero-sequence transformer BL2 coil connect two input ends of amplification control circuit Q2, amplification control circuit Q2 output one end 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 are for improving the breakdown reverse voltage of LED 1 and LED 2, can be without diode D1 and diode D2 when the current limliting resistance of resistance R 1 and resistance R 2 is enough large.
Fig. 2 is safety ground intelligent digital formula general-purpose on-line detector circuit theory schematic diagram, circuit embodiment is to install intelligent digital corollary apparatus ZCY additional on 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 modulus change, A/D2 is changed in modulus change, A/D3 is changed in modulus change, isolating amplifier circuit Q3, isolating amplifier circuit Q4, isolating amplifier circuit Q5 composition, 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 respectively two input ends of isolating amplifier circuit Q3, the output terminal of isolating amplifier circuit Q3 connects modulus change and changes A/D1 input end, analog-digital conversion a/d 1 output terminal connection processor of single chip computer CPU tests demonstration and the processing of ground current, relay J 3 coil two ends connect respectively two input ends of isolating amplifier circuit Q4, the output terminal of isolating amplifier circuit Q4 connects modulus change and changes A/D2 input end, analog-digital conversion a/d 2 output terminals connect processor of single chip computer CPU operation voltage signal intensity are shown and processed, instrument connection CS2 and instrument connection CS4 connect respectively two input ends of isolating amplifier circuit Q5, the output terminal of isolating amplifier circuit Q5 connects modulus change and changes A/D3 input end, analog-digital conversion a/d 3 output terminals connect processor of single chip computer CPU equipotential are carried out to detection display processing, processor of single chip computer CPU has the output interface of demonstration XS, printout interface DY, communication output TX interface.
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, are also online power supplys, are the huge electrical appliances of quantity, can carry out comprehensive safety detection to it with the present invention.Its step:
1.. single-phase tripolar 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 electricity;
3.. press checkout button SBNP1, user's earth leakage circuit-breaker RCD1 does not trip proves that the single three pole socket CHZ1 wiring of user are correct, if user's earth leakage circuit-breaker RCD1 tripping operation power-off proves zero line N1 and the ground wire PE0 misconnection of the single-phase three pole socket CHZ1 of user, the selection of resistance R 3 resistances must make to be greater than 30mA by the electric current of resistance R 3;
4. with test pencil checkout can determine single phase poaer supply zero line N and single phase poaer supply live wire L position whether 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 wire, 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 prove not have protective earth or interruption;
6.. instrument connection CS2 is contacted with instrument connection CS3 with wire, earth leakage circuit-breaker RCD2 and user's earth leakage circuit-breaker RCD1 do not trip, with wire, 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 minimum resistance position; instrument connection CS2 is contacted with instrument connection CS3 with wire, user's earth leakage circuit-breaker RCD1 does not trip, and illustrates that 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, instrument connection CS2 is contacted with tested metal object with wire, the earth leakage circuit-breaker RCD2 disconnection of tripping, illustrate that tested metal object protective earth is normal, otherwise prove not have protective earth or interruption;
3. single-phase tripolar 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, instrument connection CS1 is connected with instrument connection CS2 with wire, enter intelligent digital corollary apparatus ZCY by the data of current transformer BL5 and transformer BT secondary winding BL4 and carry out processes and displays measurement electric current, voltage and stake resistance, determine with this whether safety ground standard and safety ground meet standard.
4. switch contact a0 and switch contact a2 connect for example; instrument connection CS2 is connected with instrument connection CS3 with wire; 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 of earth leakage protection regulation, prove that user's earth leakage circuit-breaker RCD1 does not have safeguard protection effect if display measurement electric current when user's earth leakage circuit-breaker RCD1 tripping operation disconnects is greater than 30mA when too many.

Claims (2)

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 safety ground earth leakage protection control formula general-purpose on-line detector is safety ground general-purpose on-line detector and user's earth leakage protection composition Composite Double earth leakage protection, series transformer BT secondary winding BL4 on the ground wire running through after zero-sequence transformer BL2, transformer BT armature winding BL3 connection~220V power supply, 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, secondary winding BL4 and relay J 3 coils of switch contact a0 connection 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 tripolar 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 armature winding BL3 of transformer BT after running through zero-sequence transformer BL2, the other end contact resistance R3 of checkout button SBNP1, the other end of resistance R 1 connects the negative pole of diode D1, the negative pole of the anodal connecting luminous diode LED1 of diode D1, the other end contact resistance R2 of relay J 3 normally opened contacts, the other end of resistance R 2 connects the negative pole of diode D2, the negative pole of the anodal 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 R 3, 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 zero line N4 and the instrument connection CS3 of the single-phase three pole socket CHZ3 of specific function 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, two extension lines of zero-sequence transformer BL2 coil connect two input ends of amplification control circuit Q2, amplification control circuit Q2 output one end 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 are for improving the breakdown reverse voltage of LED 1 and LED 2.
2. safety ground general-purpose on-line detector according to claim 1, it is characterized in that installing intelligent digital corollary apparatus ZCY additional on safety ground earth leakage protection control formula general-purpose on-line detector, intelligent digital corollary apparatus ZCY is by processor of single chip computer CPU, A/D1 is changed in modulus change, A/D2 is changed in modulus change, A/D3 is changed in modulus change, isolating amplifier circuit Q3, isolating amplifier circuit Q4, isolating amplifier circuit Q5 composition, 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 respectively two input ends of isolating amplifier circuit Q3, the output terminal of isolating amplifier circuit Q3 connects modulus change and changes A/D1 input end, analog-digital conversion a/d 1 output terminal connection processor of single chip computer CPU tests demonstration and the processing of ground current, relay J 3 coil two ends connect respectively two input ends of isolating amplifier circuit Q4, the output terminal of isolating amplifier circuit Q4 connects modulus change and changes A/D2 input end, analog-digital conversion a/d 2 output terminals connect processor of single chip computer CPU operation voltage signal intensity are shown and processed, instrument connection CS2 and instrument connection CS4 connect respectively two input ends of isolating amplifier circuit Q5, the output terminal of isolating amplifier circuit Q5 connects modulus change and changes A/D3 input end, analog-digital conversion a/d 3 output terminals connect processor of single chip computer CPU equipotential are carried out to detection display processing, processor of single chip computer CPU has the output interface of demonstration XS, printout interface DY, communication output TX interface.
CN201320278266.3U 2013-05-10 2013-05-10 Safety grounding universal on-line detector Expired - Fee Related CN203616420U (en)

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CN201320278266.3U CN203616420U (en) 2013-05-10 2013-05-10 Safety grounding universal on-line detector

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CN201320278266.3U CN203616420U (en) 2013-05-10 2013-05-10 Safety grounding universal on-line detector

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107064723A (en) * 2016-02-10 2017-08-18 本德尔有限两合公司 For the method and apparatus for the disconnection for detecting protection conductor connection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107064723A (en) * 2016-02-10 2017-08-18 本德尔有限两合公司 For the method and apparatus for the disconnection for detecting protection conductor connection

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Granted publication date: 20140528

Termination date: 20160510