CN205583645U - Earth leakage protection controlling means - Google Patents
Earth leakage protection controlling means Download PDFInfo
- Publication number
- CN205583645U CN205583645U CN201620315597.3U CN201620315597U CN205583645U CN 205583645 U CN205583645 U CN 205583645U CN 201620315597 U CN201620315597 U CN 201620315597U CN 205583645 U CN205583645 U CN 205583645U
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- circuit
- contactor
- outfan
- electric leakage
- relay
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Abstract
The utility model discloses an earth leakage protection controlling means, connect and electric leakage detection circuit including main circuit, delay circuit. The utility model discloses an electric leakage detection circuit detects the electric leakage condition, and when the judgement was leaked electricity, the ac contactor in the main circuit got electric tripping operation disconnection load, and electric leakage detection circuit loses the electricity, and delay circuit switches on, and the interior second relay of delay circuit gets electricly, and ac contactor loses the electricity, examination power transmission load, and electric leakage detection circuit gets the electrician and does, if still there is then tripping operation disconnection load once more in electric leakage point. The utility model has the advantages of the security is good, and tripping operation in time when detecting the electric leakage adopts delay circuit to avoid judging by accident simultaneously, if the load end is accidental electric leakage, then through delay circuit recovering the normal power supply, if electric leakage point still exists, then trip once more, wait for the inspection.
Description
Technical field
This utility model relates to a kind of earth leakage protective control arrangement.
Background technology
Since man invented and since making electricity consumption, it is a lot of convenient that electricity can not only bring to the mankind, also can bring to the mankind
Extinction.It may burn out electrical equipment, causes fire, or makes people get an electric shock.If there being a kind of equipment can make people safely
Make electricity consumption, it will avoid the most unnecessary loss.So while omnifarious electrical equipment is comed one after another, being also born each
The protector of formula various kinds.Wherein having a kind of is special protection people, referred to as earth leakage protective device.Earth leakage protective device is commonly called as electric leakage and opens
Close, be to get an electric shock and the protection electrical equipment of electrical fire for the person anti-when circuit or electrical apparatus insulation impaired generation shorted to earth.Existing
There is old-fashioned earth leakage protective device of a great variety, to load or the electric leakage of electrical appliance or get an electric shock and the most substantially can carry out effectively when normal
Protection controls, but the most potential the fatal defect: if when itself occurs abnormal failure, its defencive function will lose efficacy and
Form out of control refusing to jump, meet electric leakage or electric shock can not cut off load or the alternating current power supply of electrical appliance in time, also cannot protect
Electric shock person's safety.In reality, any electronic product is again abnormal failure to occur unavoidably, such as: zero sequence current mutual inductor H
Secondary coil and tripping coil be easiest to occur broken string or short trouble, or circuit somewhere occur open circuit or short circuit
Fault is also common.Now, meet leakage current signal can not trigger control circuit action and being formed refuse to jump, it is impossible to cut in time
Disconnected load supplying, loses leakage protection, and this is the long unheeded technical barrier in this field.Therefore, existing earth leakage protective
Device the most only arranges test button and checks its safety protection function the most effective, and alerts user periodic inspection effect.So
And, in actual use, user often ignores or forgets or be inconvenient to carry out validity check, and this just allows partial function lose efficacy
False peace earth leakage protective device at electricity online operation, lie dormant fatal danger to the person！On the contrary, people are also mistakenly considered it is safety
Effectively, so, existing old-fashioned earth leakage protective device is susceptible to electric shock casualty accident when extraordinary failure.
Utility model content
The purpose of this utility model is the earth leakage protective control arrangement providing a kind of safety good, existing old-fashioned to solve
Earth leakage protective device often lost efficacy out of control because of abnormal failure own, it is impossible to cut off load supplying in time, there is potential safety hazard, tight
Heavily threaten the technical problem of personal safety.
To achieve these goals, the technical solution of the utility model is as follows: a kind of earth leakage protective control arrangement, including supplying
Electricity end, the power end of load is connected with feeder ear, it is characterised in that described earth leakage protective control arrangement also includes main circuit, time delay
Circuit connects and electric-leakage detection circuit, is provided with an A.C. contactor, the one of described ac contactor coil in described main circuit
End is connected with feeder ear the first end by the normally-closed contact of the second relay, and the other end of described ac contactor coil is by also
The first relay normally open contact and A.C. contactor normally opened contact that connection connects are connected with feeder ear the second end, described load power source
End is connected with the input of a pair normally-closed contact of A.C. contactor, the outfan of a pair normally-closed contact of described A.C. contactor
Being connected with feeder ear, leakage current detection circuit includes the transformer being arranged on load power source end, the first outfan of transformer with
Silicon controlled controls end and connects, and silicon controlled negative pole connects the second outfan of transformer, and a pair of described A.C. contactor normally closed
The input connection by the first relay and the first rectification circuit of the outfan of contact, the outfan of the first rectification circuit with can
The positive pole of control silicon connects, and described delay circuit includes transformator and the second rectification circuit being connected with ac contactor coil, institute
The outfan stating the second rectification circuit is connected with the input of time base circuit by the 3rd normally-closed contact of A.C. contactor, described
The input of time base circuit passes through resistance eutral grounding, is connect the outfan of the second rectification circuit, described time base circuit by electric capacity simultaneously
Outfan and the second relay coil-end connect.
According to preferred embodiment of the present utility model, described first rectification circuit is the bridge heap being made up of four diodes,
Described second rectification circuit includes the bridge heap of four diodes composition, and the filtering that is connected with the outfan of described bridge heap and surely
Volt circuit.
According to preferred embodiment of the present utility model, the diodes in parallel that the coil-end of the second relay is oppositely arranged with
Connect.
According to preferred embodiment of the present utility model, the outfan of described second rectification circuit is parallel with a resistance and one
Optical diode.
This utility model detects drain conditions by electric-leakage detection circuit, and when judging electric leakage, A.C. contactor obtains electric jumping
Lock disconnecting consumers, electric-leakage detection circuit dead electricity, delay circuit is energized, and the second relay in delay circuit obtains electric, ac contactor
Device dead electricity, trial line charging loads, and electric-leakage detection circuit obtains electric work, and as leakage point of electricity still suffers from, trip disconnecting consumers the most again.This reality
It is that safety is good by novel advantage, can trip in time when electric leakage being detected, use delay circuit to avoid erroneous judgement simultaneously, as
Really load end is accidentally electric leakage, then recover normal power supply by delay circuit, if leakage point of electricity still suffers from, the most again trip, etc.
To be checked.
Accompanying drawing explanation
Fig. 1 shows circuit diagram of the present utility model.
Detailed description of the invention
Combine accompanying drawing 1 in detail below and describe operation principle of the present utility model.
A kind of earth leakage protective control arrangement, including feeder ear, the power end of load is connected with feeder ear, it is characterised in that institute
State earth leakage protective control arrangement and also include that main circuit, delay circuit connect and electric-leakage detection circuit, be provided with in described main circuit
One A.C. contactor JC, one end of described ac contactor coil is by the normally-closed contact J2-1 of the second relay and feeder ear the
One end connect, the first relay normally open contact J1-1 that the other end of described ac contactor coil connects in parallel with exchange
Catalyst normally opened contact JC-2 is connected with feeder ear the second end, described load power source end and a pair normally-closed contact of A.C. contactor
The input of JC-1 connects, and the outfan of a pair normally-closed contact JC-1 of described A.C. contactor is connected with feeder ear, leakage current
First outfan of transformer HG, transformer HG that testing circuit includes being arranged on load power source end and the control of controllable silicon SCR
End connects, and the negative pole of controllable silicon SCR connects the second outfan of transformer, a pair normally-closed contact JC-1's of described A.C. contactor
Outfan is connected by the input of the first relay and the first rectification circuit, the outfan of the first rectification circuit and controllable silicon
The positive pole of SCR connects, and described delay circuit includes transformator T and the second rectification circuit being connected with ac contactor coil, institute
The outfan stating the second rectification circuit is connected with the input of time base circuit IC2 by the 3rd normally-closed contact of A.C. contactor,
The input of described time base circuit IC2 passes through resistance R2 ground connection, is met the outfan of the second rectification circuit, institute by electric capacity C3 simultaneously
The coil-end of the outfan and the second relay J 2 of stating time base circuit IC2 connects.
According to preferred embodiment of the present utility model, described first rectification circuit is to be made up of four diode VD1 ~ VD4
Bridge heap, described second rectification circuit includes the bridge heap of four diode VD5 ~ VD8 composition, and with the outfan of described bridge heap
The filter capacitor C2 connected and mu balanced circuit.
According to preferred embodiment of the present utility model, the diodes in parallel that the coil-end of the second relay is oppositely arranged with
Connect.
According to preferred embodiment of the present utility model, the outfan of described second rectification circuit is parallel with a resistance R3 and
LED.
Its operation principle is as follows.
Under normal condition, the normally-closed contact JC-1 Guan Bi power supply of A.C. contactor JC, normally opened contact JC-2 disconnects, electric leakage inspection
The normally opened contact J1-1 of the first relay J 1 of slowdown monitoring circuit also disconnects, so JC coil and all no powers of delay circuit below.
When load end leaks electricity, having faradic current (pressure) in transformer HG, controllable silicon SCR turns on, and J1 obtains electric, JH adhesive,
JC obtains electric, and JC-1 disconnecting consumers is powered, and JC-2 closes self-insurance, electric-leakage detection circuit dead electricity, and J1 discharges the most again.Meanwhile, prolong
Time actuating circuit energising.Civil power, by transformator T blood pressure lowering, bridge heap VD5～VD8 rectification, filter capacitor C2, mu balanced circuit IC1, obtains
12V DC source.At the beginning, 2 feet of time base circuit IC2 and 6 feet because electric capacity C3 both end voltage can not be suddenlyd change in high level, 3
Foot is low level, and the second relay J 2 is release conditions.Electric capacity C3 charges after a period of time by resistance R2,2 feet of IC2 and 6
Foot current potential drops to 2/3 supply voltage, and 3 foot output high level, the second relay J 2 obtains electric, and its normally-closed contact J2-1 disconnects, JC
Dead electricity discharges, and JC-2 disconnects, and delay circuit thereafter also returns to off-position.JC-1 closes trial line charging.If load end is even
So electric leakage, the most now recovers normal power supply, if leakage point of electricity still suffers from, the most again trips, wait to be checked.Wherein, resistance R2, electricity
It is anti-interference set, in order to avoid clutter makes circuit erroneous action for holding c3.JC-3 can be in the moment of JC trial line charging by the electric charge on electric capacity C3
Bleed off, it is ensured that circuit can be promptly restored to initial time delay state.When LED is lighted, indicating circuit is in and prolongs
Time "on" position.
Element is selected: electric-leakage detection circuit can be changed a social system by the detection part of ready-made earth leakage circuit-breaker, as long as by former suction
An iron coil instead small-sized 220V relay just may be used.J2 is with small-sized 12V DC relay.JC can select according to load
220V A.C. contactor.The time base circuits such as IC2 NE555.After being completed, adjust the resistance of resistance R1 as required, make to prolong
Time the time be just may be used between several minutes for one minute.
Above content is to combine concrete preferred implementation further detailed description of the utility model, it is impossible to
Assert that this utility model is embodied as being confined to these explanations above-mentioned.Common skill for this utility model art
For art personnel, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, all should
It is considered as belonging to protection domain of the present utility model.
Claims (4)
1. an earth leakage protective control arrangement, including feeder ear, the power end of load is connected with feeder ear, it is characterised in that described
Earth leakage protective control arrangement also includes that main circuit, delay circuit connect and electric-leakage detection circuit, is provided with one in described main circuit
A.C. contactor, one end of described ac contactor coil is by the normally-closed contact of the second relay with feeder ear the first end even
Connecing, the first relay normally open contact and A.C. contactor that the other end of described ac contactor coil connects in parallel are normally opened
Contact is connected with feeder ear the second end, and described load power source end is connected with the input of a pair normally-closed contact of A.C. contactor,
The outfan of a pair normally-closed contact of described A.C. contactor is connected with feeder ear, and leakage current detection circuit includes being arranged on load
The transformer of power end, the first outfan of transformer controls end with silicon controlled and is connected, and silicon controlled negative pole connects transformer
Second outfan, the outfan of a pair normally-closed contact of described A.C. contactor is by the first relay and the first rectification circuit
Input connects, and the outfan of the first rectification circuit is connected with silicon controlled positive pole, and described delay circuit includes and ac contactor
The transformator of device coil connection and the second rectification circuit, the outfan of described second rectification circuit passes through the 3rd of A.C. contactor
Normally-closed contact is connected with the input of time base circuit, and the input of described time base circuit passes through resistance eutral grounding, passes through electric capacity simultaneously
Connecing the outfan of the second rectification circuit, the outfan of described time base circuit and the coil-end of the second relay connect.
2. earth leakage protective control arrangement as claimed in claim 1, it is characterised in that described first rectification circuit is by four two
The bridge heap of pole pipe composition, described second rectification circuit includes the bridge heap of four diodes compositions, and with the output of described bridge heap
The filtering of end connection and mu balanced circuit.
3. earth leakage protective control arrangement as claimed in claim 2, it is characterised in that the coil-end of the second relay is reverse with
The diodes in parallel arranged connects.
4. earth leakage protective control arrangement as claimed in claim 2, it is characterised in that the outfan of described second rectification circuit is also
It is associated with a resistance and a light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620315597.3U CN205583645U (en) | 2016-04-15 | 2016-04-15 | Earth leakage protection controlling means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620315597.3U CN205583645U (en) | 2016-04-15 | 2016-04-15 | Earth leakage protection controlling means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205583645U true CN205583645U (en) | 2016-09-14 |
Family
ID=56862674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620315597.3U Expired - Fee Related CN205583645U (en) | 2016-04-15 | 2016-04-15 | Earth leakage protection controlling means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205583645U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329471A (en) * | 2016-10-20 | 2017-01-11 | 常州尼诺光电科技有限公司 | Automatic restorable leakage protection circuit breaker and working method thereof |
| CN109412139A (en) * | 2017-08-18 | 2019-03-01 | 陈金明 | The anti-short-circuit energy-saving safe electrical appliance of 380V protection against electric shock |
| CN110676825A (en) * | 2019-11-28 | 2020-01-10 | 国网江苏省电力有限公司镇江供电分公司 | Circuit disconnection protection method based on voltage vector difference and backup power automatic switching and application |
| CN116626533A (en) * | 2023-07-20 | 2023-08-22 | 山东云开电力有限公司 | Intelligent detection circuit for electric leakage of power switch cabinet |
-
2016
- 2016-04-15 CN CN201620315597.3U patent/CN205583645U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329471A (en) * | 2016-10-20 | 2017-01-11 | 常州尼诺光电科技有限公司 | Automatic restorable leakage protection circuit breaker and working method thereof |
| CN109412139A (en) * | 2017-08-18 | 2019-03-01 | 陈金明 | The anti-short-circuit energy-saving safe electrical appliance of 380V protection against electric shock |
| CN110676825A (en) * | 2019-11-28 | 2020-01-10 | 国网江苏省电力有限公司镇江供电分公司 | Circuit disconnection protection method based on voltage vector difference and backup power automatic switching and application |
| CN110676825B (en) * | 2019-11-28 | 2021-04-27 | 国网江苏省电力有限公司镇江供电分公司 | Circuit disconnection protection method based on voltage vector difference and backup power automatic switching and application |
| CN116626533A (en) * | 2023-07-20 | 2023-08-22 | 山东云开电力有限公司 | Intelligent detection circuit for electric leakage of power switch cabinet |
| CN116626533B (en) * | 2023-07-20 | 2023-10-13 | 山东云开电力有限公司 | Intelligent detection circuit for electric leakage of power switch cabinet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: East big detection (Shanghai) Co., Ltd. patent Document name: Notification that Application Deemed not to be Proposed |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 200000, room 10-12, No. 1577, Lane 317, West Road, Jingan District, Shanghai Patentee after: Sky pass (Shanghai) Inspection Co., Ltd. Address before: 200000, room 10-12, No. 1577, Lane 317, West Road, Zhabei District, Shanghai Patentee before: Dongda testing (Shanghai) Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 Termination date: 20210415 |