CN206575138U - A kind of Three phase four-wire system, which is powered, uses earth leakage protective device - Google Patents
A kind of Three phase four-wire system, which is powered, uses earth leakage protective device Download PDFInfo
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- CN206575138U CN206575138U CN201720351929.8U CN201720351929U CN206575138U CN 206575138 U CN206575138 U CN 206575138U CN 201720351929 U CN201720351929 U CN 201720351929U CN 206575138 U CN206575138 U CN 206575138U
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
A kind of Three phase four-wire system, which is powered, uses earth leakage protective device; three-phase four-wire system includes 1 zero line, 3 live wires; 3 live wires are respectively the first live wire, the second live wire and the 3rd live wire; power taking point is equipped with zero line and live wire; induction coil, leakage current amplification control unit, the power circuit of accumulation of energy three, three powered electromagnetic iron and the electrical apparatus release worked in the presence of three powered electromagnetic iron are gathered including leakage current, electrical apparatus release is connected on zero line and live wire；Leakage current signal on leakage current collection induction coil collection zero line and live wire, and the current signal collected is output to leakage current amplification control unit；Leakage current amplification control unit output signal controls the "on" position of three powered electromagnetic iron.The utility model solves the problem of breaking electrical apparatus releases of two L of conventional earth leakage protector can not work, while also solving three-phase and four-line earth leakage protective device cannot function as the drawbacks of monophase leakage protector is used, it is ensured that the safe and stable reliable work of earth leakage protective device.
Description
Technical field
The utility model belongs to earth leakage protective device field, more particularly to a kind of Three phase four-wire system is powered and uses earth leakage protective
Device.
Background technology
Earth leakage protective device, abbreviation leakage switch, is called RCCB, when leak current fault occurs in equipment or has fatal
The dangerous person provides protection when getting an electric shock, and with overload and short-circuit protection function, can be used to the overload of protection circuit or motor
And short circuit, it can be also used under normal circumstances as the infrequently start and stop of circuit.
But, existing earth leakage protective device has huge design defect, the control circuit of existing earth leakage protective device
Power supply has two kinds：One kind is N plus L models (L is any one in L1, L2, L3), and earth leakage protective device end of incoming cables is worked as in this design
N open circuits or the breaking earth leakage protective devices of L will fail, and earth leakage protective device will not have leakage protection, the L of lower end at least two
It is powered.Another is L plus L models (L is any one in L1, L2, L3), and earth leakage protective device end of incoming cables is worked as in this design design
Earth leakage protective device will also fail when any one L is breaking in L+L, and other two L lines are still powered.Once generation case above will
Jeopardize personal safety.
Meanwhile, it is any two power lines of connection inside traditional earth leakage protective device testing button, once wherein one company
Testing button will fail when being connected to the power line open circuit of testing button, so four lines that conventional earth leakage protector is connected are necessary
Ensure that whole paths could be used, therefore the line earth leakage protective device of conventional three-phase four cannot function as monophase leakage protector and use.
Utility model content
The utility model aim to provide it is a kind of it is simple in construction, single-phase earth leakage and the good line of Three phase four of using effect can be done
Power supply earth leakage protective device processed.
In order to solve the above technical problems, the utility model provides following technical scheme：A kind of Three phase four-wire system
Power supply earth leakage protective device, three-phase four-wire system includes 1 zero line, 3 live wires, and 3 live wires are respectively the first live wire, the second live wire
With the 3rd live wire, power taking point, including leakage current collection induction coil, leakage current amplification control list are equipped with zero line and live wire
Member, the power circuit of accumulation of energy three, three powered electromagnetic iron and the electrical apparatus release worked in the presence of three powered electromagnetic iron, electrical apparatus release connection
In on zero line and live wire；
Leakage current signal on leakage current collection induction coil collection zero line and live wire, leakage current collection induction coil
It is provided with the first output end and the second output end, the first output end of leakage current collection induction coil and the connection of the second output end
Leakage current amplification control unit；Leakage current amplification control unit output signal controls the "on" position of three powered electromagnetic iron；
Centre tap, three powered electromagnetic iron negative poles and three powered electromagnetic iron positive poles are provided with three powered electromagnetic iron；
The power circuit of accumulation of energy three is provided with positive power source terminal, negative power end and zero power end being connected with centre tap；
The power circuit of accumulation of energy three includes diode and two electric capacity, and two electric capacity are connected to positive power source terminal and zero power supply
Between end and between negative power end and zero power end；It is respectively connected with two diodes on every live wire, every live wire and two
The connected mode all same of diode；The first diode and the second diode, the power taking of the first live wire are connected with first live wire
The negative pole of point the first diode of connection and the positive pole of the second diode, the positive pole connection negative power end of the first diode；Two or two
The negative pole connection positive power source terminal of pole pipe；The power taking point of zero line connects zero power end；
Leakage current amplification control unit includes the first controllable silicon, the second controllable silicon, the first discharge diode, the second electric discharge two
Pole pipe, the first isolation capacitance and the second isolation capacitance；
First output end of leakage current collection induction coil connects the control pole of the first controllable silicon and the second controllable silicon, the
The anode of one controllable silicon connects three powered electromagnetic iron positive poles, the first controllable silicon negative electrode connection negative supply；
The negative electrode of second controllable silicon connects three powered electromagnetic iron negative poles, and the anode of the second controllable silicon connects positive power source terminal, the
The control pole of two controllable silicons is connected with the control pole of the first controllable silicon；
The positive pole of first discharge diode and the second discharge diode connects the first controllable silicon and the second controllable silicon respectively
Negative electrode；The negative pole of first discharge diode and the second discharge diode connects the control of the first controllable silicon and the second controllable silicon respectively
Pole；
Second output end of leakage current collection induction coil connects one end of the first isolation capacitance and the second isolation capacitance,
The other end of first isolation capacitance and the second isolation capacitance connects the negative electrode of the first controllable silicon and the second controllable silicon respectively.
It is connected with test button and current-limiting resistance, current-limiting resistance connection positive power source terminal or negative supply on zero power end in turn
End.
Leakage current collection induction coil is sheathed on outside zero line and live wire, and leakage current collection induction coil is located at zero line
Between power taking point and the power taking point of live wire.
The centre tap of three powered electromagnetic iron is located at the middle part of coil, the forward end and negative end of centre tap and coil it
Between electrical potential difference it is equal.
Also include shell, leakage current collection induction coil, the power circuit of accumulation of energy three, leakage current amplification control unit, three
Powered electromagnetic iron and electrical apparatus release are respectively positioned on enclosure.
By above technical scheme, the beneficial effects of the utility model are：1st, by the power taking simultaneously from four power transmission lines,
Meanwhile, three powered electromagnetic iron set two power supply terminals and a centre tap so that three powered electromagnetic iron are at least both threads
The problem of breaking electrical apparatus releases of two L of conventional earth leakage protector can not work can be solved, it is ensured that leakage with normal work during connection
The safe and stable reliable work of non-electricity protector；Meanwhile, two electric capacity that power unit is set, as long as having two wire passages, two
Individual electric capacity will charge, and when system has electric leakage, and three powered electromagnetic ironworkers of triggering make, two electric capacity, which will discharge, ensures three powered electromagnetics
The reliable and stable work of iron.2nd, the electrical potential difference between centre tap and the forward end and negative end of coil is equal, so as to ensure that
Tapped action effect, it is ensured that even if partial fault occurs in the power circuit of accumulation of energy three, simply by the presence of electrical potential difference, three power supplys
Electromagnet can normal work.3rd, leakage current collection induction coil be located at zero line power taking point and live wire power taking point it
Between, so that positive avalanche type gain is formed, even if there is very small leakage current that the power circuit of accumulation of energy three will be caused to work；Because of zero
The power taking point of line and the power taking point of live wire are located at leakage current collection induction coil two ends respectively, once the power circuit of accumulation of energy three
Work can increase the leakage current that leakage current collection induction coil is sensed again, form avalanche type gain.4th, test button is set
Test button is ensure that between zero power end and negative power end or zero power end and positive power source terminal of the power circuit of accumulation of energy three
Reliably working, as long as any two power line circuit tests button just can work.5th, by setting shell, to earth leakage protective device
Protected, it is ensured that the safe and reliable work of earth leakage protective device.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Embodiment
A kind of Three phase four-wire system, which is powered, uses earth leakage protective device, wherein, three-phase four-wire system includes 1 zero line N and 3 fire
Line L, 3 live wire L are respectively the first live wire L1, the second live wire L2 and the 3rd live wire L3.Power taking point is equipped with zero line and live wire,
Power taking point wherein on zero line is that the power taking point on the first power taking point K1, the first live wire L1 is the second power taking point K2, the second live wire
Power taking point on L2 is that the power taking point on the 3rd power taking point K3, the 3rd live wire L3 is the 4th power taking point K4.
As shown in figure 1, this earth leakage protective device includes housing, housing is used to protect earth leakage protective device, simultaneously, it is ensured that this electric leakage
Safety during protector use, prevents that element therein is directly exposed.
Leakage current collection induction coil, leakage current amplification control unit, the power supply of accumulation of energy three are internally provided with housing 1
Circuit, test button, three powered electromagnetic iron and the electrical apparatus release TQ worked in the presence of three powered electromagnetic iron.
Leakage current signal on leakage current collection induction coil collection zero line and live wire, and the leakage current collected is believed
Number it is output to leakage current amplification control unit；Leakage current amplification control unit output signal controls the energization shape of three powered electromagnetic iron
State.
Leakage current collection induction coil DL is used to gather the leakage current in circuit, checks whether the situation of electric leakage, leaks
Electric current acquisition induction coil DL output end connection leakage current amplification control unit, wherein, leakage current collection induction coil
DL output end includes the first output end and the second output end.Wherein, zero line and three live wires are arranged in leakage current collection sense
Coil DL centre is answered, leakage current collection induction coil DL is located between the power taking point on the first power taking point K1 and live wire.Leakage
Electric current acquisition induction coil DL is used for collection voltages and produces current signal, when there is not leaky, in three-phase electricity
Induced electromotive force on current vector and be zero, leakage current collection induction coil is zero not produce electric current；It is existing when there is electric leakage
As when, current vector in three-phase electricity and be not zero, induced electromotive force output drive had on leakage current collection induction coil DL
Streaming current, electric leakage situation just can be monitored by gathering the induced electromotive force.
Because the power taking point of zero line and the power taking point of live wire are located at the two ends that leakage current gathers induction coil DL, one respectively
The work of the power circuit of denier accumulation of energy three can increase the leakage current that leakage current collection induction coil is sensed again, form avalanche type and increase
Benefit.
Leakage current amplification control unit is used for the output signal for receiving leakage current collection induction coil DL, while leakage current
Amplification control unit controls the work of three powered electromagnetic iron according to the current signal sensed.
Leakage current amplification control unit includes the first controllable silicon Q1, the second controllable silicon Q2, the first discharge diode D7, second
Discharge diode D8, the first isolation capacitance C3 and the second isolation capacitance C4；
First output end of leakage current collection induction coil connects the control pole of the first controllable silicon and the second controllable silicon, the
One controllable silicon Q1 anode connects three powered electromagnetic iron positive poles, and the first controllable silicon Q1 negative electrode connects the negative of the power circuit of accumulation of energy three
Power end DC-；
Second controllable silicon Q2 negative electrode connects three powered electromagnetic iron negative pole T-, the second controllable silicon Q2 anode connection accumulation of energy three
The positive power source terminal DC+ of power circuit, the second controllable silicon Q2 control pole is connected with the control pole of the first controllable silicon；
First discharge diode D7 and the second discharge diode D8 positive pole connect the first controllable silicon Q1 and second respectively can
Control silicon Q2 negative electrode；First discharge diode D7 and the second discharge diode D8 negative pole connect the first controllable silicon Q1 and respectively
Two controllable silicon Q2 control pole；
Leakage current collection induction coil DL the second output end connection the first isolation capacitance C3 and the second isolation capacitance C4
One end, the first isolation capacitance C3 and the second isolation capacitance C4 other end connects the first controllable silicon Q1 and the second controllable silicon respectively
Q2 negative electrode.
Three powered electromagnetic iron are provided with centre tap, three powered electromagnetic iron positive pole T+ and three powered electromagnetic iron negative pole T-, in
Between tap be located at the middle part of coil, the three powered electromagnetic iron positive pole T+ and three powered electromagnetic iron negative pole T- of centre tap and coil it
Between electrical potential difference it is equal, as long as therefore three powered electromagnetic iron positive pole T+, three powered electromagnetic iron negative pole T- and zero power end it is any it
Between there is potential difference, three powered electromagnetic iron can work.
Electrical apparatus release TQ is commercially available prod, and electrical apparatus release TQ is connected on zero line and live wire, when having magnetic force on three powered electromagnetic iron
During generation, electrical apparatus release can be acted so that zero line and live wire disconnect, and then realize the purpose of leakage, breaking.For the knot of electrical apparatus release
Structure is repeated no more.
The power circuit of accumulation of energy three is that leakage current amplification control unit and three powered electromagnetic iron provide power supply, the power supply of accumulation of energy three electricity
Zero electricity that the signal output part on road includes positive power source terminal DC+, negative power end DC- and is connected with the centre tap of three powered electromagnetic iron
Source DC0.
Wherein, the power circuit of accumulation of energy three includes diode and two electric capacity, and two electric capacity are respectively the first electric capacity C1 and the
Two electric capacity C2, the first electric capacity C1 and the second electric capacity C2 are connected between positive power source terminal DC+ and zero power end DC0 and negative electricity
Between source DC- and zero power end DC0.Zero line N the first power taking point K1 passes through zero power end DC0 connection centre taps T0.
Diode has 6,6 diodes be respectively the first diode D1, the second diode D2, the 3rd diode D3,
4th diode D4, the 5th diode D5, the 6th diode D6.
Wherein the first diode D1, second diode D2 the first live wires of connection L1 the second power taking point K2；3rd diode
D3, the 4th diode D4 the second live wires of connection L2 the 3rd power taking point K3；5th diode D5, the 6th diode D6 connections the 3rd
Live wire L3 the 4th power taking point K4.
Illustrated by taking the first diode D1, second diode D2 the first live wires of connection L1 as an example：On first live wire L1
Second power taking point connects the first diode D1 negative pole, the first diode D1 positive pole connection forward end DC-；First live wire L1 is also
Connect the second diode D2 positive pole, the second diode D2 negative pole connection negative end DC+.
For guarantee effect effect, the first electric capacity C1 is connected between the first diode D1 positive pole and zero line；Two or two
The second electric capacity C2 is connected between pole pipe D2 negative pole and zero line.During work, as long as having zero line N, the first live wire L1, the second live wire
Any two articles in L2, the 3rd live wire L3 are in channel status, and the first electric capacity C1 and the second electric capacity C2 will charge, when system has leakage
During electric situation, electric leakage amplification control unit work will be triggered, the first electric capacity C1 and the second electric capacity C2, which will discharge, ensures three power supplys
The reliable and stable work of electromagnet.
The 3rd power taking point K3 and the 5th diode on 3rd diode D3, the 4th diode D4 the second live wires of connection L2
The 4th power taking point K4 on D5, the live wire L3 of the 6th diode D6 connections the 3rd is connected with the first diode D1, the second diode D2
The first power taking point K1 structures on first live wire L1 are identical, will not be repeated here.
In the present embodiment, the power circuit of accumulation of energy three is respectively from the first live wire L1, the second live wire L2, the 3rd L3, zero line N tetra-
Power line power taking, the electricity of taking-up exports positive electromotive force, zero electromotive force respectively through the first diode and the second diode and born
To electromotive force, and positive electromotive force, zero electromotive force and negative sense electromotive force give the first electric capacity C1 and the second electric capacity C2 chargings again；Work
When work, as long as any two power lines are not breaking in four power lines can ensure electric leakage amplification control unit and three power supplys
Work of electromagnet, and then ensure the normal work of electrical apparatus release, this unique failure mode of design is：There are three to break in four power lines
Road, such case can not possibly occur in reality, because all electrical equipments can not all work if three open circuits, and experiment is pressed
Button also fails, and electricity consumption personnel can pinpoint the problems in time.
In order to ensure to be connected with turn on the reliability of work, zero power end DC0 of the power supply of accumulation of energy three test button S1 and
Current-limiting resistance R1, test button S1 connection current-limiting resistance R1 first end, current-limiting resistance R2 the second end connection positive power source terminal DC
+, or current-limiting resistance R2 the second end connection negative power end DC-.
Leakage condition is simulated when pressing test button S1, the power taking in main circuit is understood in the power supply of accumulation of energy three formation loop, by
It is located at leakage current collection induction coil two ends respectively in the first power taking point and rear power taking point, causes to gather by leakage current and feel
Answer the current vector of coil to be transferred to electric leakage with the sensor current signal being not equal on zero, leakage current collection induction coil to banish
Big control unit, current signal drives the first controllable silicon and the second controlled silicon conducting to connect, so that the power supply of accumulation of energy three is three power supplys
Electromagnet is powered, and the action of three powered electromagnetic iron makes trip gear dropout power-off so that the first live wire L1, the second live wire L2, the 3rd
Live wire L3 and zero line N disconnects, and then ensures Electrical Safety.
The supply line that the utility model is applied to three-phase four-wire system can also use as monophase leakage protector, work
When, the power taking simultaneously from four power transmission lines, meanwhile, three powered electromagnetic iron set two power supply terminals and a centre tap, protect
Normal work of the three powered electromagnetic iron when at least both threads are connected is demonstrate,proved；The utility model solves conventional earth leakage protector two
The problem of root L open circuit electrical apparatus releases can not work, it is ensured that the safe and stable reliable work of earth leakage protective device.
Claims (5)
1. a kind of Three phase four-wire system, which is powered, uses earth leakage protective device, three-phase four-wire system includes 1 zero line, 3 live wires, 3 fire
Line is respectively that power taking point is equipped with the first live wire, the second live wire and the 3rd live wire, zero line and live wire, it is characterised in that：Including
Leakage current collection induction coil, leakage current amplification control unit, the power circuit of accumulation of energy three, three powered electromagnetic iron and in three power supplys
The electrical apparatus release worked in the presence of electromagnet, electrical apparatus release is connected on zero line and live wire；
Set on leakage current signal on leakage current collection induction coil collection zero line and live wire, leakage current collection induction coil
There are the first output end and the second output end, the first output end of leakage current collection induction coil and the connection electric leakage of the second output end
Flow amplification control unit；Leakage current amplification control unit output signal controls the "on" position of three powered electromagnetic iron；
Centre tap, three powered electromagnetic iron negative poles and three powered electromagnetic iron positive poles are provided with three powered electromagnetic iron；
The power circuit of accumulation of energy three is provided with positive power source terminal, negative power end and zero power end being connected with centre tap；
The power circuit of accumulation of energy three includes diode and two electric capacity, two electric capacity be connected to positive power source terminal and zero power end it
Between and negative power end and zero power end between；Two diodes, every live wire and two two poles are respectively connected with every live wire
The connected mode all same of pipe；The first diode and the second diode are connected with first live wire, the power taking point of the first live wire connects
Connect the negative pole of the first diode and the positive pole of the second diode, the positive pole connection negative power end of the first diode；Second diode
Negative pole connection positive power source terminal；The power taking point of zero line connects zero power end；
Leakage current amplification control unit includes the first controllable silicon, the second controllable silicon, the first discharge diode, the second two poles of electric discharge
Pipe, the first isolation capacitance and the second isolation capacitance；
First output end of leakage current collection induction coil connects the control pole of the first and second controllable silicons, the first controllable silicon
Anode connects three powered electromagnetic iron positive poles, the first controllable silicon negative electrode connection negative supply；
The negative electrode of second controllable silicon connects three powered electromagnetic iron negative poles, and the anode of the second controllable silicon connects positive power source terminal, and second can
The control pole of control silicon is connected with the control pole of the first controllable silicon；
The positive pole of first discharge diode and the second discharge diode connects the negative electrode of the first controllable silicon and the second controllable silicon respectively；
The negative pole of first discharge diode and the second discharge diode connects the control pole of the first controllable silicon and the second controllable silicon respectively；
Second output end of leakage current collection induction coil connects one end of the first discharge capacity and the second discharge capacity, first
The other end of discharge capacity and the second discharge capacity connects the negative electrode of the first controllable silicon and the second controllable silicon respectively.
2. Three phase four-wire system as claimed in claim 1, which is powered, uses earth leakage protective device, it is characterised in that：On zero power end according to
It is secondary to be connected with test button and current-limiting resistance, current-limiting resistance connection positive power source terminal or negative power end.
3. Three phase four-wire system as claimed in claim 2, which is powered, uses earth leakage protective device, it is characterised in that：Leakage current is gathered
Induction coil is sheathed on outside zero line and live wire, and leakage current collection induction coil is located at the power taking of the power taking point and live wire of zero line
Between point.
4. Three phase four-wire system as claimed in claim 3, which is powered, uses earth leakage protective device, it is characterised in that：Three powered electromagnetic iron
Centre tap be located at the middle part of coil, the electrical potential difference between centre tap and the forward end and negative end of coil is equal.
5. the Three phase four-wire system as described in Claims 1-4 any one, which is powered, uses earth leakage protective device, it is characterised in that：
Also include shell, leakage current collection induction coil, the power circuit of accumulation of energy three, leakage current amplification control unit, three powered electromagnetics
Iron and electrical apparatus release are respectively positioned on enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720351929.8U CN206575138U (en) | 2017-04-06 | 2017-04-06 | A kind of Three phase four-wire system, which is powered, uses earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720351929.8U CN206575138U (en) | 2017-04-06 | 2017-04-06 | A kind of Three phase four-wire system, which is powered, uses earth leakage protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206575138U true CN206575138U (en) | 2017-10-20 |
Family
ID=60053386
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720351929.8U Expired - Fee Related CN206575138U (en) | 2017-04-06 | 2017-04-06 | A kind of Three phase four-wire system, which is powered, uses earth leakage protective device |
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| CN (1) | CN206575138U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735238A (en) * | 2020-12-31 | 2021-04-30 | 杭州拓深科技有限公司 | Multifunctional electric fire early warning demonstration box |
-
2017
- 2017-04-06 CN CN201720351929.8U patent/CN206575138U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735238A (en) * | 2020-12-31 | 2021-04-30 | 杭州拓深科技有限公司 | Multifunctional electric fire early warning demonstration box |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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