CN207184035U - A kind of total current responsive type Aftercurrent protecting equipment - Google Patents
A kind of total current responsive type Aftercurrent protecting equipment Download PDFInfo
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- CN207184035U CN207184035U CN201721251870.1U CN201721251870U CN207184035U CN 207184035 U CN207184035 U CN 207184035U CN 201721251870 U CN201721251870 U CN 201721251870U CN 207184035 U CN207184035 U CN 207184035U
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Abstract
The utility model discloses a kind of total current responsive type Aftercurrent protecting equipment, including three-phase alternating current distribution line, including power supply circuit, residual current detection module, residual current processing module, isolation circuit, test current circuit, dropout execution circuit and tripping actuating mechanism, power supply circuit respectively with residual current processing module, the input power of test current circuit and dropout power circuit is in parallel, residual current detection module rear class is electrically connected with residual current processing module and test current circuit respectively, residual current processing module rear class is electrically connected with isolation circuit, isolation circuit rear class is electrically connected with dropout execution circuit, dropout execution circuit rear class is electrically connected with tripping actuating mechanism；Residual current detection module includes current transformer.Complicated wave form residual current signal can be accurately induced, personnel's physical safety can be effectively protected and electrical equipment is safe to use, diversified electrical equipment trend can be applicable.
Description
Technical field
A kind of current protective device is the utility model is related to, more particularly, to a kind of Aftercurrent protecting equipment.
Background technology
Aftercurrent protecting equipment is mainly by each phase in low-voltage distributing line（Containing center line）Current phasor and it is not
Zero and caused residual current detection, with prevent human body from getting an electric shock and electrical fire caused by personal injury and electrical equipment damage
A kind of protection device that accident occurs.And traditional residual current protective device, mainly with AC types Aftercurrent protecting equipment and A types
Based on Aftercurrent protecting equipment；Wherein AC types Aftercurrent protecting equipment plays protection to simple alternating current residual current, and A types are remaining
Current protective device can be to rated frequency simple alternating current residual current, pulsating direct current residual current and issuable compound residue
Electric current provides protection.Development and electrical equipment however as intelligent grid are on the increase, and electrical equipment type also presents more
Sample trend, such as the application of the power electronic equipment such as frequency converter, Medical Devices and UPS are increasingly extensive, these power electronics
During device fails, caused residual current is no longer single power frequency sinusoidal current, but with pulsating direct current component,
Even smooth direct current component, while the frequency of residual current signal is up to 1000Hz, even more high in some cases；Using
Traditional AC types and A types Aftercurrent protecting equipment then can not accurately induce complicated wave form residual current signal, so that nothing
Method is effectively protected personnel's physical safety and electrical equipment is safe to use.
Utility model content
The utility model can not accurately induce complicated wave form and remain to solve existing AC types and A types Aftercurrent protecting equipment
Aftercurrent signal, so that it cannot be effectively protected personnel's physical safety and electrical equipment is safe to use, variation can not be applicable
The present situation such as electrical equipment trend and one kind for providing can accurately induce complicated wave form residual current signal, can be effectively protected
Personnel's physical safety and electrical equipment are safe to use, can be applicable the remaining electricity of total current responsive type of diversified electrical equipment trend
Flow protection device.
The utility model is that concrete technical scheme is used by solving above-mentioned technical problem：A kind of total current responsive type remains
Aftercurrent protection device, including three-phase alternating current distribution line, it is characterised in that：Including power supply circuit, residual current detection
Module, residual current processing module, isolation circuit, test current circuit, dropout execution circuit and tripping actuating mechanism, power supply electricity
Input power of the source circuit respectively with residual current processing module, test current circuit and dropout power circuit is in parallel, remaining
Current detection module rear class is electrically connected with residual current processing module and test current circuit respectively, residual current processing module
Rear class is electrically connected with isolation circuit, and isolation circuit rear class is electrically connected with dropout execution circuit, dropout execution circuit rear class with
Tripping actuating mechanism is electrically connected；Residual current detection module includes current transformer.Can be to applying or delaying suddenly in loop
Slowly the 1000Hz and following simple alternating current residual current risen, the residual current of exchange residual current superposition smooth direct current, arteries and veins
The residual current of dynamic direct current residual current superposition smooth direct current, pulsating direct current residual current and smooth direct current caused by rectification circuit
Residual current, correct protection act, is effectively protected personnel and electrical equipment.Complicated wave form residual current letter can accurately be induced
Number, personnel's physical safety can be effectively protected and electrical equipment is safe to use, diversified electrical equipment trend can be applicable.
Preferably, described residual current processing module includes exciting current module, modulation /demodulation module and electric current ratio
Compared with module, exciting current module rear class is electrically connected with modulation /demodulation module, adjusts demodulation module rear class and current comparing module
It is electrically connected, modulation /demodulation module detects the DC component and low frequency component of exciting current module.Pass through modem section pair
The DC component of the exciting curent of driver unit or the detection of low frequency component, so as to by rating unit, effectively be compared
Compared with threshold values, improving residual current processing has acting type.
Preferably, described three-phase alternating current distribution is provided with tripping actuating mechanism with electric line prime, in dropout execution machine
The three-phase alternating current distribution line of structure prime is provided with dropout power circuit, power supply circuit and test current circuit, remaining electricity
Current transformer on stream detection module mutually senses with the three-phase alternating current distribution line of tripping actuating mechanism prime to be connected, electricity of threading off
Source circuit rear class is electrically connected with dropout execution circuit.
Preferably, described tripping actuating mechanism includes AC220V magnetictrips and link gear, dropout performs electricity
Road includes tripping coil, controllable silicon, fly-wheel diode and RC filter circuits, and fly-wheel diode is connected in parallel on tripping coil both ends, continues
It is electrically connected after stream diode cathode is in parallel with tripping coil with dropout power circuit rear class, fly-wheel diode anode and trip line
It is electrically connected after circle is in parallel with controllable silicon anode, controllable silicon negative electrode is parallel with RC filter circuits, SCR control with control interpolar
Pole is electrically connected with isolation circuit output end；The isolation circuit output end other end is electrically connected with dropout power circuit rear class.Carry
High dropout coordinated signals.
Preferably, described isolation circuit includes optical coupling isolator and is located at the shunting current limliting electricity of optical coupling isolator periphery
Resistance.Isolation effect is improved, is improved
Preferably, described dropout power circuit be included in tripping actuating mechanism prime three-phase alternating current distribution line and
Three commutation diodes, three commutation diode anodes are connected with the three-phase alternating current distribution line of tripping actuating mechanism prime respectively
Connect, three commutation diode negative electrodes are electrically connected jointly.
Preferably, described test current circuit includes test resistance and spring button mechanism, test resistance and button
After mechanism is in series, electrically connected with any one be in parallel in the three-phase alternating current distribution line of tripping actuating mechanism prime.Improve
Unit protection effect, realize experiment dropout effect.
Preferably, described power supply circuit includes switch tube module, is located at switch tube module input and output both ends
Filter capacitor and commutation diode, three commutation diode anodes three-phase alternating current distribution with tripping actuating mechanism prime respectively
Circuit is connected, and three commutation diode negative electrodes are electrically connected jointly, the three-phase alternating current distribution line of tripping actuating mechanism rear class
Middle N lines are individually electrically connected with the 8th commutation diode negative electrode, the 8th commutation diode anode and switching tube module ground wire phase
Electrical connection, switch tube module output end output direct current power source voltage 24V.Ensure circuit electrical stability.
Preferably, described residual current processing module is powered using DC24V.Ensure circuit electrical stability.
The beneficial effects of the utility model are：Effectively enable Aftercurrent protecting equipment to applying or delaying suddenly in loop
Slowly the 1000Hz and following simple alternating current residual current risen, the residual current of exchange residual current superposition smooth direct current, arteries and veins
The residual current of dynamic direct current residual current superposition smooth direct current, pulsating direct current residual current and smooth direct current caused by rectification circuit
Residual current, correct protection act, is effectively protected personnel and electrical equipment.Built using inexpensive element, structure letter
It is single, and easily realize.
Brief description of the drawings：
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is a kind of structural principle block diagram schematic diagram of total current responsive type Aftercurrent protecting equipment of the utility model.
Fig. 2 is a kind of electrical block diagram of total current responsive type Aftercurrent protecting equipment of the utility model.
Embodiment
In embodiment shown in Fig. 1, Fig. 2, a kind of total current responsive type Aftercurrent protecting equipment, including three-phase alternating current are matched somebody with somebody
Electric line ABCN, including power supply circuit 30, residual current detection module 10, residual current processing module 20, isolation circuit
50th, test current circuit 30, dropout execution circuit 60 and tripping actuating mechanism 80, power supply circuit 30 respectively with residual current
The input power of processing module 10, test current circuit 40 and dropout power circuit 70 is in parallel, residual current detection module 10
Rear class is electrically connected with residual current processing module 20 and test current circuit 40 respectively, the rear class of residual current processing module 20 with
Isolation circuit 50 is electrically connected, and the rear class of isolation circuit 50 is electrically connected with dropout execution circuit 60, the rear class of dropout execution circuit 60
It is electrically connected with tripping actuating mechanism 80；Residual current detection module 10 includes RCT types current transformer 11.Residual current processing
Module 20 includes exciting current module, modulation /demodulation module and current comparing module, exciting current module rear class and modulation /demodulation
Module is electrically connected, and regulation demodulation module rear class is electrically connected with current comparing module, modulation /demodulation module detection exciting current
The DC component and low frequency component of module.Three-phase alternating current distribution line ABCN is provided with tripping actuating mechanism 80 with electric line prime,
Dropout power circuit 70, power supply circuit 30 are provided with the three-phase alternating current distribution line ABCN of the prime of tripping actuating mechanism 80
With test current circuit 40, current transformer 11 and the three-phase of the prime of tripping actuating mechanism 80 in residual current detection module 10
AC power distribution line ABCN phases sense connection, and the rear class of dropout power circuit 70 is electrically connected with dropout execution circuit 60.Dropout is held
Row mechanism includes AC220V magnetictrips and link gear, and dropout execution circuit includes tripping coil L1, controllable silicon Q1, afterflow
The RC filter circuits of diode D7 and first resistor R1 compositions in parallel with the first electric capacity C1, sustained diode 7 are connected in parallel on trip line
L1 both ends are enclosed, are electrically connected after the negative electrode of sustained diode 7 is in parallel with tripping coil L1 with the rear class of dropout power circuit 70, afterflow
It is electrically connected after diode D7 anodes are in parallel with tripping coil L1 with controllable silicon Q1 anodes, controllable silicon Q1 negative electrodes are with controlling interpolar simultaneously
RC filter circuits are associated with, controllable silicon Q1 control poles are electrically connected with the output end of isolation circuit 50；The output end of isolation circuit 50 is another
End is electrically connected with the rear class of dropout power circuit 70.Isolation circuit 50 includes optical coupling isolator U1 and is located at optical coupling isolator periphery
Shunting current limliting second resistance R2,3rd resistor R3 and the 4th resistance R4.Dropout power circuit 70 is included in dropout execution machine
Three-phase alternating current distribution line ABCN, the first commutation diode D1, the second commutation diode D2 and the 3rd rectification two of the prime of structure 80
Pole pipe D3, three commutation diode anodes are connected with the three-phase alternating current distribution line of tripping actuating mechanism rear class respectively, three
Commutation diode negative electrode is electrically connected jointly.Test current circuit 40 includes test resistance R1 and spring button mechanism K, experiment electricity
After resistance R1 and button mechanism K is in series, with any one phase in the three-phase alternating current distribution line of the prime of tripping actuating mechanism 80 simultaneously
Connection electrical connection.Spring button mechanism K is pressed, and distribution line A produces residual current to N by resistance R1 so that protection device is moved
Make, so as to realize the purpose of experiment dropout.Tripping actuating mechanism 80 includes the clutch that control is influenceed by tripping coil control L1
S1.Power supply circuit 30 include switch tube module 31, the second filter capacitor C2 for being located at switch tube module input and output both ends,
3rd filter capacitor C3 and the 4th commutation diode D4, the 5th commutation diode D5 and the 6th commutation diode D6, three rectifications
Diode anode is connected with the three-phase alternating current distribution line of tripping actuating mechanism rear class respectively, and three commutation diode negative electrodes are total to
With being electrically connected, N lines are individually cloudy with the 8th commutation diode D8 in the three-phase alternating current distribution line of tripping actuating mechanism rear class
Pole is electrically connected, and the 8th commutation diode anode is electrically connected with switching tube module ground wire, and the output end output of switch tube module is straight
Flow supply voltage 24V.Residual current processing module is powered using DC24V.
Above content and structure describes the general principle of the utility model product, principal character and of the present utility model excellent
Point, it should be understood by those skilled in the art that.Simply illustrate principle of the present utility model described in examples detailed above and specification,
On the premise of the spirit and scope of the utility model is not departed from, the utility model also has various changes and modifications, these changes
Belonged to improving within claimed the scope of the utility model.The utility model requires protection scope will by appended right
Ask book and its equivalent thereof.
Claims (9)
1. a kind of total current responsive type Aftercurrent protecting equipment, including three-phase alternating current distribution line, it is characterised in that：Including supplying
Electric power circuit, residual current detection module, residual current processing module, isolation circuit, test current circuit, dropout perform electricity
Road and tripping actuating mechanism, power supply circuit are electric with residual current processing module, test current circuit and dropout power supply respectively
The input power on road is in parallel, residual current detection module rear class respectively with residual current processing module and test current circuit phase
Electrical connection, residual current processing module rear class are electrically connected with isolation circuit, and isolation circuit rear class is mutually electric with dropout execution circuit
Connection, dropout execution circuit rear class are electrically connected with tripping actuating mechanism；Residual current detection module includes current transformer.
2. according to the total current responsive type Aftercurrent protecting equipment described in claim 1, it is characterised in that：Described residue electricity
Stream process module includes exciting current module, modulation /demodulation module and current comparing module, exciting current module rear class and modulation
Demodulation module is electrically connected, and regulation demodulation module rear class is electrically connected with current comparing module, the detection excitation of modulation /demodulation module
The DC component and low frequency component of current module.
3. according to the total current responsive type Aftercurrent protecting equipment described in claim 1, it is characterised in that：Described three are intersecting
Stream distribution is provided with tripping actuating mechanism with electric line prime, is provided with the three-phase alternating current distribution line of tripping actuating mechanism prime
Dropout power circuit, power supply circuit and test current circuit, current transformer and dropout in residual current detection module
The three-phase alternating current distribution line of executing agency's rear class mutually senses connection, and dropout power circuit rear class is mutually electrically connected with dropout execution circuit
Connect.
4. according to the total current responsive type Aftercurrent protecting equipment described in claim 1 or 3, it is characterised in that：Described is de-
Button executing agency includes AC220V magnetictrips and link gear, and dropout execution circuit includes tripping coil, controllable silicon, afterflow
Diode and RC filter circuits, fly-wheel diode are connected in parallel on tripping coil both ends, and fly-wheel diode negative electrode is in parallel with tripping coil
It is electrically connected with dropout power circuit rear class, is mutually electrically connected with controllable silicon anode after fly-wheel diode anode is in parallel with tripping coil afterwards
Connect, controllable silicon negative electrode is parallel with RC filter circuits with control interpolar, and SCR control pole is electrically connected with isolation circuit output end；
The isolation circuit output end other end is electrically connected with dropout power circuit rear class.
5. according to the total current responsive type Aftercurrent protecting equipment described in claim 1, it is characterised in that：Described isolation electricity
Road includes optical coupling isolator and is located at the shunting current-limiting resistance of optical coupling isolator periphery.
6. according to the total current responsive type Aftercurrent protecting equipment described in claim 1, it is characterised in that：Described dropout electricity
Source circuit is included in the three-phase alternating current distribution line and three commutation diodes of tripping actuating mechanism prime, three commutation diodes
Anode is connected with the three-phase alternating current distribution line of tripping actuating mechanism prime respectively, the common mutually electricity of three commutation diode negative electrodes
Connection.
7. according to the total current responsive type Aftercurrent protecting equipment described in claim 1, it is characterised in that：Described experiment electricity
Current circuit includes test resistance and spring button mechanism, after test resistance is in series with button mechanism, before tripping actuating mechanism
Any one electrical connection that is in parallel in the three-phase alternating current distribution line of level.
8. according to the total current responsive type Aftercurrent protecting equipment described in claim 1, it is characterised in that：Described power supply electricity
Source circuit includes switch tube module, is located at the filter capacitor and commutation diode at switch tube module input and output both ends, and three whole
Stream diode anode is connected with the three-phase alternating current distribution line of tripping actuating mechanism rear class respectively, three commutation diode negative electrodes
Be electrically connected jointly, in the three-phase alternating current distribution line of tripping actuating mechanism rear class N lines individually with the 8th commutation diode the moon
Pole is electrically connected, and the 8th commutation diode anode is electrically connected with switching tube module ground wire, and the output end output of switch tube module is straight
Flow supply voltage 24V.
9. according to the total current responsive type Aftercurrent protecting equipment described in claim 1 or 2, it is characterised in that：Described is surplus
Aftercurrent processing module is powered using DC24V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721251870.1U CN207184035U (en) | 2017-09-27 | 2017-09-27 | A kind of total current responsive type Aftercurrent protecting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721251870.1U CN207184035U (en) | 2017-09-27 | 2017-09-27 | A kind of total current responsive type Aftercurrent protecting equipment |
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| CN207184035U true CN207184035U (en) | 2018-04-03 |
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| CN201721251870.1U Active CN207184035U (en) | 2017-09-27 | 2017-09-27 | A kind of total current responsive type Aftercurrent protecting equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731007A (en) * | 2020-12-11 | 2021-04-30 | 深圳供电局有限公司 | Residual current protection device test system |
| CN112736835A (en) * | 2020-12-03 | 2021-04-30 | 深圳供电局有限公司 | Residual current protection device |
| CN112748321A (en) * | 2020-12-04 | 2021-05-04 | 深圳供电局有限公司 | Testing device for residual current protection device |
| CN114694938A (en) * | 2022-03-30 | 2022-07-01 | 安徽省昌盛电子有限公司 | Current clutter filtering system |
-
2017
- 2017-09-27 CN CN201721251870.1U patent/CN207184035U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736835A (en) * | 2020-12-03 | 2021-04-30 | 深圳供电局有限公司 | Residual current protection device |
| CN112736835B (en) * | 2020-12-03 | 2023-03-03 | 深圳供电局有限公司 | Residual current protection device |
| CN112748321A (en) * | 2020-12-04 | 2021-05-04 | 深圳供电局有限公司 | Testing device for residual current protection device |
| CN112748321B (en) * | 2020-12-04 | 2023-01-24 | 深圳供电局有限公司 | Testing device for residual current protection device |
| CN112731007A (en) * | 2020-12-11 | 2021-04-30 | 深圳供电局有限公司 | Residual current protection device test system |
| CN112731007B (en) * | 2020-12-11 | 2023-09-15 | 深圳供电局有限公司 | Residual current protection device test system |
| CN114694938A (en) * | 2022-03-30 | 2022-07-01 | 安徽省昌盛电子有限公司 | Current clutter filtering system |
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