CN2186966Y - Digital pulse electric shock and leakage protector - Google Patents
Digital pulse electric shock and leakage protector Download PDFInfo
- Publication number
- CN2186966Y CN2186966Y CN 93232500 CN93232500U CN2186966Y CN 2186966 Y CN2186966 Y CN 2186966Y CN 93232500 CN93232500 CN 93232500 CN 93232500 U CN93232500 U CN 93232500U CN 2186966 Y CN2186966 Y CN 2186966Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- electric shock
- output terminal
- leakage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Breakers (AREA)
Abstract
The utility model relates to a digital pulse type electric shock and leakage protector. A signal amplifying circuit and an impulse output circuit are connected in parallel with the output terminal of a rectification filtering voltage stabilizing circuit. The output terminal of the signal amplifying circuit is connected with a pulse conversion circuit. Two points A and B of the pulse conversion circuit are respectively connected with the input terminal of a comparison circuit. The output terminal of the comparison circuit is connected with the output terminal of a digital logic processing circuit. The output terminal of the digital logic processing circuit is connected with the input terminal of the impulse output circuit. The utility model can distinguish electric shock signals from electric leakage signals, and can automatically resume sending electricity after electric shock and tripping operation; the utility model is widely applied to electric shock and leakage protection in various power supply systems.
Description
The utility model belongs to the power protector technical field, particularly a kind of digit pulse type electric shock earth leakage protective device.
The earth leakage protective device overwhelming majority of using electricity system use now simulates; leakage type; cooperate air switch; electric leakage to using electricity system is protected; this earth leakage protective device measuring circuit is an analogue circuit; corresponding processing signals is also for simulating signal; when no matter using electricity system is that people and animals get an electric shock or the bad electric leakage situation that causes of line insulation takes place; protector just makes the air switch tripping operation; can not recover automatically to send; according to the relevant safety utilization of electric power regulation of country; human electric shock's safe current is≤30mA, and the electric leakage permissible value of circuit is 200mA, and the design action leakage current of above-mentioned protector is 30-60mA; also inseparable electric shock and electric leakage; like this, above-mentioned protector will frequently trip under the bigger situation of line electrical leakage, and can not recover automatically to send after the tripping operation; need artificial the combined floodgate to send; if the long-term design action electric current that surpasses of electric leakage then send incessantly electricity at all, bring very big inconvenience to the user.Recent years is existing to be differentiated and gets an electric shock and the impulse type protector of electric leakage comes out, but circuit all is to adopt resolution element and simulate integrated circuit, makes the circuit complexity; the debugging trouble, poor anti jamming capability, misoperation often; and maintenance difficulty is big, brings a lot of inconvenience to the user.
The purpose of this utility model is a kind of novel electric shock earth leakage protective device of design; adopt digital integrated circuit; simulation volume is handled through digital technology become digital quantity; adopt pulse technique; the electric shock signal of emergentness is differentiated with the electric leakage signal that slowly changes; cooperate the automatic closing of to delay time after the tripping operation of getting an electric shock with A.C. contactor.
The utility model comprises by power transformer, bridge rectifier, the rectification filtering voltage stabilizing circuit that filter capacitor and three terminal integrated voltage stabilizer constitute, output at rectification filtering voltage stabilizing circuit is parallel with signal amplification circuit that is made of operational amplifier and the promotion output circuit that is made of triode and relay, it is characterized in that being connected to pulse conversion circuit at the output of signal amplification circuit, pulse conversion circuit comprises by resistance, differential and integrating circuit that electric capacity constitutes, the A of impulse transfer electrical equipment, 2 of B are connected with the input of comparison circuit respectively, comparison circuit is made of integrated operational amplifier, the output of comparison circuit is connected with the input of Digital Logic treatment circuit, the Digital Logic treatment circuit is made of the digital integrated circuit Schmidt trigger, and the output of Digital Logic treatment circuit is connected with the input that promotes output circuit.
Because the utility model has adopted pulse technique and Digital Logic treatment technology; can differentiate electric shock signal and electric leakage signal; under the bigger situation of line electrical leakage, also can normally move; can recover to send electricity automatically after the electric shock tripping operation, signal processing all adopts integrated circuit, makes circuit reliable; simple in structure; debug easy to maintenancely, can replace the various earth leakage protective devices that use at present, be widely used in the usefulness that various electric power systems are made electric shock earth leakage protective.
Accompanying drawing shows the electrical schematic diagram of embodiment of the present utility model.
In the present embodiment, digit pulse type electric shock earth leakage protective device comprises by power transformer B, bridge rectifier D
1-D
4, filter capacitor C
1, C
2, C
3And three terminal integrated voltage stabilizer IC
1The rectification filtering voltage stabilizing circuit (1) that constitutes is connected to by integrated operational amplifier IC at the output of rectification filtering voltage stabilizing circuit (1)
2-1The signal amplification circuit (2) that constitutes, wherein L
1Be the zero sequence current mutual inductance coil, protectedly pass wherein with electric line, when protected electricity consumption line-to-ground has the electric shock electric leakage signal, L
1Two ends just induce a voltage signal, this signal is through C
4R is passed through in filtering
2, R
3Be connected to operational amplifier IC respectively
2-12 pin and 3 pin, D
5, D
6Be operational amplifier IC
2-1Input limited amplitude protection element, R
1Be voltage stabilizing didoe DW
1Current-limiting resistance, DW
1Effect be to IC
2-1Provide a suitable voltage power supply point, R
4Be negative feedback resistor, D
7Be detector diode, R
5Be load resistance, C
5, R
6, C
6Constitute pi type filter, the output of pi type filter is connected to pulse conversion circuit (3), and pulse conversion circuit (3) is by C
7, R
7, C
8, R
8Constitute C
7, R
7Constitute integrator, identify electric leakage signal from the output of A point, inoperative to electric shock signal.C
8, R
8Constitute differentiator, identify the electric shock pulse signal by the output of B point, inoperative to electric leakage signal.The output signal that A, B are 2 is connected with the input of comparison circuit (4), and comparison circuit (4) is by integrated operational amplifier IC
2-2, IC
2-3, IC
2-4Constitute the A point output and the IC of pulse conversion circuit (3)
2-25 pin connect the B point output and the IC of pulse conversion circuit (3)
2-3, IC
2-410 pin be connected IC with 13 pin
2-2Constitute the electric leakage comparator, W
1Slide head and IC
2-26 pin connect, adjust W
1Can set the size of electric leakage signal, when the electrical leakage voltage signal makes IC
2-2The current potential of 5 pin be higher than IC
2-26 pin when setting current potential, IC
2-27 pin output high level, D
11And R
10Constitute the earth leakage search/lockout feedback circuit.IC
2-3, IC
2-4Constitute window comparator, W
2Set the upper voltage limit of window comparator, W
2Slide head meet IC
2-39 pin, W
3Set the lower voltage limit of window comparator, W
3Slide head meet IC
2-412 pin, R
9Be divider resistance, the electric shock pulse voltage signal of ordering as B makes IC
2-310 pin current potentials be higher than IC
2-3The setting current potential of 9 pin the time, IC
2-38 pin output high level, the electric shock pulse voltage signal of exporting when B point makes IC
2-413 pin current potentials be lower than IC
2-4The setting current potential of 12 pin the time, IC
2-414 pin output high level.D
8, D
9, D
10Constitute OR circuit, with IC
27,8,14 pin output signal with or gate logic relation export the input of Digital Logic treatment circuit (5) to.Digital Logic treatment circuit (5) is by digital integrated circuit Schmidt trigger IC
3Constitute, the output of comparison circuit (4) passes through R
11With IC
3-11 pin connects, IC
3-11 pin on also be parallel with the accumulate capacitor C
9With bleeder resistance R
12With IC
3-1Constitute monostable circuit.IC
3-2Constitute reclosing delay lock circuit, its effect is to work as IC
3-12 pin when becoming high level (being protector recovers to send by being powered down to), within a certain period of time with IC by low level
3-1The input locking.IC
3-2Peripheral cell C is arranged
10, R
13, D
12, C
10An end and IC
3-12 pin connect the other end and R
13Series connection back ground connection, C
10And R
13Tie point meet IC
3-23 pin.D
12Positive pole meet IC
3-11 pin, negative pole meets IC
3-24 pin.The output of Digital Logic treatment circuit (5) is connected with the input that promotes output circuit (6).Promote output circuit (6) by triode T
1And relay J
1Constitute, other composed components have current-limiting resistance R
14, R
15, R
16, filter capacitor C
11, diode D releases
13, luminous demonstration diode (LED)
1, J
1-1And J
1-2Be relay J
1Normally-closed contact and normally opened contact.
In the present embodiment, the selection of main components and parts is as follows:
IC
1：LM7812
IC
2：LM324
IC
3：CD40106
T
1：C8050
Basic mechanical design feature is:
Specified electric shock pulse action electric current 30mA
Rated residual operating current 200mA
Pulse break-time≤0.2S
Time-delay reclosure time 20-70S
Operating voltage AC220V ± 15%
During use, when being used for always protecting, the earth connection of power transformer is passed zero sequence current mutual inductance coil L
1When being used for the distributor cap protection, if the two-phase electricity must pass zero sequence current mutual inductance coil L together with zero line and live wire
1In, if three-phase electricity must be passed zero sequence current mutual inductance coil L together with three live wires and zero line
1In.Normally opened contact J
1-2Be serially connected in the pull-in winding of A.C. contactor.
Claims (1)
- Digit pulse type electric shock earth leakage protective device; it comprises rectification filtering voltage stabilizing circuit (1); output at rectification filtering voltage stabilizing circuit (1) is parallel with signal amplification circuit (2) that is made of operational amplifier and the promotion output circuit (6) that is made of triode and relay; the output that it is characterized in that signal amplification circuit (2) is connected to pulse conversion circuit (3); pulse conversion circuit (3) comprises by resistance; differential and integrating circuit that electric capacity constitutes; the A of pulse conversion circuit (3); 2 of B are connected with the input of comparison circuit (4) respectively; comparison circuit (4) is made of integrated operational amplifier; the output of comparison circuit (4) is connected with the input of Digital Logic treatment circuit (5); Digital Logic treatment circuit (5) is made of the digital integrated circuit Schmidt trigger, and the output of Digital Logic treatment circuit (5) is connected with the input that promotes output circuit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93232500 CN2186966Y (en) | 1993-11-30 | 1993-11-30 | Digital pulse electric shock and leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93232500 CN2186966Y (en) | 1993-11-30 | 1993-11-30 | Digital pulse electric shock and leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2186966Y true CN2186966Y (en) | 1995-01-04 |
Family
ID=33808703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93232500 Expired - Fee Related CN2186966Y (en) | 1993-11-30 | 1993-11-30 | Digital pulse electric shock and leakage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2186966Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011160550A1 (en) * | 2010-06-25 | 2011-12-29 | Abb Spa | Residual current protection device and circuit breaker using the device |
| CN103825245A (en) * | 2014-01-27 | 2014-05-28 | 广东南冠电气有限公司 | Intelligent circuit breaker capable of distinguishing electric shock signal and leakage signal |
| CN104407271A (en) * | 2014-12-16 | 2015-03-11 | 国家电网公司 | Signal receiver for cable identification device |
| CN105403802A (en) * | 2014-09-10 | 2016-03-16 | 国网浙江余姚市供电公司 | Method for quickly carrying out electric leakage detection |
| CN105576603A (en) * | 2016-01-05 | 2016-05-11 | 余姚市嘉荣电子电器有限公司 | Double-input leakage protector |
-
1993
- 1993-11-30 CN CN 93232500 patent/CN2186966Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011160550A1 (en) * | 2010-06-25 | 2011-12-29 | Abb Spa | Residual current protection device and circuit breaker using the device |
| CN103825245A (en) * | 2014-01-27 | 2014-05-28 | 广东南冠电气有限公司 | Intelligent circuit breaker capable of distinguishing electric shock signal and leakage signal |
| CN103825245B (en) * | 2014-01-27 | 2018-01-16 | 广东南冠电气有限公司 | It is a kind of to distinguish the intelligent breaker to get an electric shock with electric leakage signal |
| CN105403802A (en) * | 2014-09-10 | 2016-03-16 | 国网浙江余姚市供电公司 | Method for quickly carrying out electric leakage detection |
| CN104407271A (en) * | 2014-12-16 | 2015-03-11 | 国家电网公司 | Signal receiver for cable identification device |
| CN105576603A (en) * | 2016-01-05 | 2016-05-11 | 余姚市嘉荣电子电器有限公司 | Double-input leakage protector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2186966Y (en) | Digital pulse electric shock and leakage protector | |
| CN2453568Y (en) | Electric power supply plug for preventing it from being leakage, over-voltage, over-load, short circuit and lightninhg-stroke | |
| CN201113387Y (en) | Split type multifunctional lightning protection creepage breaker | |
| CN211183400U (en) | Circuit of external circuit breaker of electric energy meter | |
| CN211127104U (en) | Circuit breaker | |
| CN2468201Y (en) | Self-healing earth leakage protector | |
| CN207251169U (en) | One kind is suitable for three-phase circuit simulated leakage current generating circuit | |
| CN216248113U (en) | Opening and closing current collecting circuit of circuit breaker | |
| CN2228661Y (en) | Lightning on-line monitor | |
| CN2315690Y (en) | AC load protector | |
| CN2289265Y (en) | Water level inductive controller | |
| CN2405226Y (en) | Multi-functional theft-proof device for single phase electric meter | |
| CN209525702U (en) | The dedicated buckle releaser circuit of pre-paying kilowatt-hour meter | |
| CN2165527Y (en) | Universal safety switch | |
| CN2349715Y (en) | Short-circuit protective automatic switch | |
| CN2180017Y (en) | Safety protector for electricity consumption | |
| CN2078940U (en) | Power-economizing general protector using integrated circuit | |
| CN2289297Y (en) | Relay | |
| CN2484686Y (en) | Digital intelligent line measuring controlling instrument | |
| CN2157612Y (en) | Integrated domestic electric appliances protector | |
| CN2034744U (en) | Automatic resetting multifunctional electricity-saving protector | |
| CN2281599Y (en) | Electronic protector | |
| CN2128425Y (en) | Energy-saving current limiter | |
| CN204304141U (en) | Overvoltage protection socket | |
| CN2216248Y (en) | Device for avoiding fraudulent use of electricity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |