CN106159894B - Small-sized network acquires breaker - Google Patents
Small-sized network acquires breaker Download PDFInfo
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- CN106159894B CN106159894B CN201610532876.XA CN201610532876A CN106159894B CN 106159894 B CN106159894 B CN 106159894B CN 201610532876 A CN201610532876 A CN 201610532876A CN 106159894 B CN106159894 B CN 106159894B
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- mutual inductor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses small-sized network of one kind to acquire breaker, including governor circuit, the disconnected brake mechanism of linkage and multiple power supply branches；Each power supply branch is equipped with current divider type current detection mutual inductor；It includes magnetic core, output wiring terminal, input wires terminal, the primary circuit first branch being serially connected between input wires terminal, the primary circuit second branch winding for being wrapped in magnetic core side and the secondary winding for being wrapped in the magnetic core other side that current divider type current, which detects mutual inductor,；The output electric current of the power circuit of distribution system is respectively flowed through in the impedance ratio of the primary circuit first branch and primary circuit second branch winding, and then reduce the electric current of primary circuit second branch winding, under the same output current conditions of detection, it can choose the coil turn of smaller magnetic core Yu less secondary winding, reduce the volume of current detecting mutual inductor, it is easy to install and use to reduce the volume of breaker, it is more suitable for intelligent distribution system.
Description
Technical field
The present invention relates to technical field of electricity, in particular to a kind of small-sized network acquires breaker.
Background technique
With the increase of electrical equipment type increased with electricity consumption scale, distribution system is due to short-circuit or overload in order to prevent
Cause safety accident, distribution system domestic demand is equipped with small-sized network and acquires breaker.Small-sized network acquires the effect of breaker
Be to turn on, disjunction and carrying rated operational current；And before the deadline, close, carry and cut-off abnormal loop condition
Electric current under (such as short circuit, overload, electric leakage).It can network and acquire small-sized network and acquire breaker except realizing above basic function
Outside, the remotely functions such as reading and condition monitoring such as voltage, electric current, leakage current, temperature, power, electric energy are also equipped with, for realizing intelligence
It can distribution and management.
It can network and acquire small-sized network and acquire breaker and be typically provided with current transformer, detection circuit, controller and connection
Dynamic circuit breaker brake mechanism；The high current that the power circuit of distribution system exports can be converted to low current, detection circuit by current transformer
Controller is sent to low current real-time monitoring, and by current value, if current value is more than the threshold value set in controller, control
Device sends the disconnected brake mechanism cut-off signal of linkage to, and the power circuit for the disconnected brake mechanism cutting distribution system that links prevents distribution system
Cause safety accident because of short circuit or overload, electric leakage.
As shown in Figure 1, existing current transformer is by primary circuit 3, secondary winding 5, magnetic core 1,2 and of input wires terminal
Output wiring terminal 4 forms；Primary circuit 3 is serially connected in the power circuit of distribution system by input wires terminal 2, it is secondary around
Group 5 is acquired the detection circuit of breaker and is electrically connected by output wiring terminal 4 with small-sized network, the coil turn of secondary winding 5
Number N2 is greater than the turn number N 1 of primary circuit 3.The working principle of current transformer are as follows: primary current I1 (i.e. distribution system
The output electric current of power circuit) when flowing through primary circuit 3, alternating flux induction occurs in magnetic core 1 for primary current I1, makes
Secondary winding 5 generates secondary current I2, since 1 product of turn number N of primary current I1 and primary circuit 3 is equal to secondary current
The product of the turn number N 2 of I2 and secondary winding 5, i.e. I1N1=I2N2.It follows that a load current I1 and secondary electricity
The ratio for flowing I2 is equal to the ratio of the turn number N 2 of secondary winding 5 and the turn number N 1 of primary circuit 3, i.e. I1/I2=N2/
N1。
But existing network acquires small-sized network and acquires breaker, since whole electric currents of power circuit all pass through
Current transformer has above-mentioned formula that can obtain, and lesser secondary current I2, must just increase the coil of secondary winding 5 in order to obtain
The number of turns N2, while to detect bigger electric current, easily there is magnetic saturation phenomenon in electromagnetic conversion process in magnetic core, it is necessary to increase magnetic core 1
Primary current and secondary current proportionate relationship are kept, increases the volume of current transformer, thus adopts small-sized network
The volume of collection breaker also increases, and is unfavorable for small-sized network and acquires the installation and use of breaker.
Summary of the invention
Goal of the invention of the invention is that providing small-sized network of one kind acquires breaker, to solve the whole of power circuit
Electric current all passes through small-sized network and acquires the current transformer of breaker, so that small-sized network is acquired the increase of breaker volume, no
Small-sized the problem of acquiring the realization of breaker and installing and using of networking is acquired conducive to that can network.
According to an embodiment of the invention, a kind of small-sized network acquires breaker, including governor circuit, the disconnected brake mechanism of linkage
With multiple power supply branches；
Each power supply branch includes input terminal, linkage contact and the output end being electrically connected with linkage contact
Son；
The output end of the governor circuit is electrically connected with the input terminal for the disconnected brake mechanism that links,
The linkage contact is electrically connected with the output end for linking disconnected brake mechanism,
Each power supply branch further includes current divider type current detection mutual inductor；
The current divider type current detection mutual inductor includes magnetic core, output wiring terminal, input wires terminal, is serially connected in input
It the primary circuit first branch of connecting terminal, the primary circuit second branch winding for being wrapped in the magnetic core side and is wrapped in
The secondary winding of the magnetic core other side；
The coil turn of the secondary winding is greater than the coil turn of the primary circuit second branch winding；
The impedance of the primary circuit second branch winding is greater than the impedance of the primary circuit first branch；
The coil turn of the primary circuit second branch winding is an at least circle；
Each current divider type current detection mutual inductor is connected to corresponding power supply branch by the input terminal substring
Between the linkage contact and the output terminal, the output wiring terminal of each current divider type current detection mutual inductor with
The input terminal of the governor circuit is electrically connected.
Further, the impedance of the impedance of the primary circuit second branch winding and the primary circuit first branch press than
Example setting.
Further, the coil turn of the coil turn of the secondary winding and the primary circuit second branch winding press than
Example setting.
Further, the disconnected brake mechanism that links includes that magnetic infers that lock driving part and disconnected combined floodgate execution unit, the magnetic push away
Disconnected lock driving part is connect with the disconnected combined floodgate execution unit, and each linkage contact connects with the disconnected combined floodgate execution unit
It connects.
Further, the governor circuit includes that current detection circuit, processing circuit and magnetic push away driving circuit,
The output wiring terminal of each current divider type current detection mutual inductor respectively with the current detection circuit
Input terminal and the magnetic infer the input terminal electrical connection of lock driving part；
The output end of the current detection circuit is electrically connected with the input terminal of the processing circuit；
The output end of the processing circuit is electrically connected with the input terminal that the magnetic pushes away driving circuit；
The magnetic pushes away the output end of driving circuit and the magnetic infers that the input terminal of lock driving part is electrically connected.
Further, the governor circuit further includes the electric-leakage detection circuit being electrically connected with the input terminal of the processing circuit；
It is described it is small-sized network that acquire breaker further include creepage mutual inductor, the creepage mutual inductor is serially connected with all described
Between the linkage contact and corresponding current divider type current detection mutual inductor of power supply branch；
The output end of the creepage mutual inductor infers that lock drives with the input terminal of the electric-leakage detection circuit and the magnetic respectively
The input terminal of dynamic component is electrically connected.
Further, the governor circuit further includes the temperature sensing circuit being electrically connected with the input terminal of the processing circuit,
The power supply branch is equipped with temperature sensor, and the output end of each temperature sensor is defeated with the temperature sensing circuit
Enter end electrical connection.
Further, the governor circuit further includes the first voltage detection electricity being electrically connected with the input terminal of the processing circuit
Road；
It is equipped with first voltage detection output between the input terminal and the linkage contact of each power supply branch,
Each first voltage detection output is electrically connected with the input terminal of the first voltage detection circuit.
Further, the governor circuit further includes the second voltage detection electricity being electrically connected with the input terminal of the processing circuit
Road；
Second voltage detection output is equipped between the linkage contact and creepage mutual inductor of each power supply branch
Son, each second voltage detection output are electrically connected with the input terminal of the second voltage detection circuit.
Further, the governor circuit further includes radio communication circuit and wire communication circuit, the processing circuit it is defeated
Outlet is electrically connected with the input terminal of the input terminal of the wire communication circuit and the radio communication circuit respectively.
From the above technical scheme, embodiment of the invention discloses small-sized network of one kind to acquire breaker, uses
Current divider type current detects mutual inductor, and primary circuit is divided into two branches, makes the output electric current point of the power circuit of distribution system
Not Tong Guo the primary circuit first branch and primary circuit second branch winding, and then reduce primary circuit second branch winding electricity
Stream, the current reduction for generating secondary winding reduce the coil turn and core volume of secondary winding, reduce current divider type current inspection
The volume for surveying mutual inductor, when for detecting high current, current divider type current detection mutual inductor configured the primary circuit first branch and
The impedance ratio of primary circuit second branch winding can be such that the electric current of primary circuit second branch winding reduces, also just make to shunt
The volume of formula current detecting mutual inductor reduces, so that small-sized network be made to acquire the volume reduction of breaker, facilitates installation and makes
With being more suitable for intelligent distribution system；And due to the output electric current using current divider type current detection mutual inductor to power circuit
It shunts, this is small-sized to network and acquire breaker and be applicable to the output biggish distribution system of electric current.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structure chart of background technique of the invention；
Fig. 2 is that small-sized network of one kind provided in an embodiment of the present invention acquires the current divider type current detection mutual inductor of breaker
Structure chart；
Fig. 3 is that small-sized network of one kind provided in an embodiment of the present invention acquires the structure chart of breaker；
Fig. 4 is that small-sized network of another kind provided in an embodiment of the present invention acquires the structure chart of breaker；
Fig. 5 is that small-sized network of one kind provided in an embodiment of the present invention acquires the circuit theory of the governor circuit of breaker
Figure.
Wherein, 1- magnetic core, 2- input wires terminal, the primary circuit 3-, the primary circuit the 31- first branch, the primary circuit 32-
Second branch winding, 4- output wiring terminal, 5- secondary winding, 6- input terminal, 7- first voltage detection output, 8- connection
Movable contact, 9- second voltage detection output, 10- creepage mutual inductor, 11- current divider type current detect mutual inductor, 12- output end
Son, 13- temperature sensor, 14- governor circuit, the disconnected brake mechanism of 15- linkage, 16- magnetic infer lock driving part, and disconnected close a floodgate of 17- is held
Row component, 18- first voltage detection circuit, 19- second voltage detection circuit, 20- electric-leakage detection circuit, 21- temperature detection electricity
Road, 22- current detection circuit, 23- power supply circuit, 24- processing circuit, 25- magnetic push away driving circuit, 26- wire communication circuit,
27- radio communication circuit, 28- indicator light circuit.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figures 2 and 3, a kind of small-sized network acquires breaker, including governor circuit 14, disconnected 15 and of brake mechanism of linkage
Multiple power supply branches；Each power supply branch includes input terminal 6, linkage contact 8 and the output being electrically connected with linkage contact 8
Terminal 12；
The output end of governor circuit 14 is electrically connected with the input terminal for the disconnected brake mechanism 15 that links；
Linkage contact 8 is electrically connected with the output end for the disconnected brake mechanism 15 that links；
Each power supply branch further includes current divider type current detection mutual inductor 11；
Current divider type current detection mutual inductor 11 include magnetic core 1, output wiring terminal 4, input wires terminal 2, be serially connected in it is defeated
Enter the primary circuit first branch 31 between connecting terminal 2, be wrapped in the primary circuit second branch winding 32 of 1 side of magnetic core with
And it is wrapped in the secondary winding 5 of 1 other side of magnetic core；
The coil turn of secondary winding 5 is greater than the coil turn of primary circuit second branch winding 32；
The impedance of primary circuit second branch winding 32 is greater than the impedance of the primary circuit first branch 31；
The coil turn of primary circuit second branch winding 32 is an at least circle；
Each institute's current divider type current detection mutual inductor 11 is serially connected with the linkage of corresponding power supply branch by input wires terminal 2
Between contact 8 and output terminal 12, the output wiring terminal 4 of each current divider type current detection mutual inductor 11 with governor circuit 14
Input terminal electrical connection.
If the electric current (i.e. the output electric current of the power circuit of distribution system) of the inflow input terminal 6 of each power supply branch road
IAlways, the electric current by the primary circuit first branch 31 is IBranch 1, the electric current by primary circuit second branch winding 32 is IBranch 2, one
The impedance R of the minor loop first branch 31Branch 1, the impedance R of primary circuit second branch winding 32Branch 2, primary circuit second branch winding
32 coil turn is NBranch 2, the electric current I of the generation of secondary winding 52, the coil turn of secondary winding 5 is N2, by formula IBranch 2=IAlways*
RBranch 1/(RBranch 1+RBranch 2) it is found that primary circuit second branch winding 32 electric current IBranch 2Less than the inflow input terminal of the power supply branch road
The electric current I of son 6Always, and
I2=IBranch 2*NBranch 2/N2(N2> NBranch 2), so the electric current I that secondary winding 5 generates2Less than IBranch 2。
From the above technical scheme, mutual inductor 11 is detected using current divider type current, is two by the way that primary circuit 3 to be divided to
Branch makes the output electric current of the power circuit of distribution system pass through the primary circuit first branch 31 and primary circuit second respectively
Road winding 32, and then reduce the electric current I of primary circuit second branch winding 32Branch 2, reduce the electric current I that secondary winding 5 generates2, subtract
The turn number N of few secondary winding 52, when detecting onesize electric current, 1 size of magnetic core can be reduced and current divider type current detects
The volume of mutual inductor 11, so that small-sized network is made to acquire the volume reduction of breaker, it is easy to install and use, it is more suitable for intelligence
It can distribution system；For example, three-phase and quadrupole protection (i.e. three-phase 4P), small-sized network of the rated current less than 63A acquires breaker
Width be 72mm；The small-sized of single-phase two pole protection (i.e. single-phase 2P) networks that acquire the width of breaker be 36mm；And by
In using current divider type current detection mutual inductor 11, to the output current distributing of power circuit, this is small-sized network acquire breaker can
Suitable for exporting the biggish distribution system of electric current.
Preferably, the impedance of primary circuit second branch winding 32 and the impedance of the primary circuit first branch 31 are set in proportion
It sets；The coil turn of secondary winding 5 and the coil turn of primary circuit second branch winding 32 are arranged in proportion.Primary circuit
One branch 31 and primary circuit second branch winding 32 can be conductive copper sheet or conducting wire.
For example, three-phase and quadrupole as shown in Figure 3 protects (i.e. three-phase 4P) small-sized network to acquire breaker, this is small-sized
Net acquisition breaker set there are four power branch, wherein three for phase line power branch, one for zero curve power branch；If each
The electric current I of the inflow input terminal 6 of phase line power supply branch roadAlways=400A, RBranch 2:RBranch 1=12:1, N2:NBranch 2=1000:1, wherein
RBranch 2For the impedance of primary circuit second branch 32, RBranch 1For the impedance of the primary circuit first branch 31, NBranch 2For primary circuit second
The coil turn of branch 32, N2For the coil turn of secondary winding 5.
By formula IBranch 2=IAlways*RBranch 1/(RBranch 1+RBranch 2)；I2=IBranch 2*NBranch 2/N2；Wherein, IBranch 2For primary circuit second branch 32
Electric current, I2The electric current generated for secondary winding 5；I can be obtained2≈30mA。
Small-sized network of single-phase two pole protection (i.e. single-phase 2P) as shown in Figure 4 acquires breaker, this is small-sized to network
Acquisition breaker set there are two power branch, one of them for firewire power branch, another for zero curve power branch, if firewire
The electric current I of the inflow input terminal 6 of power supply branch roadAlways=300A, NBranch 2: NBranch 1=12:1, N2:NBranch 2=1000:1, wherein RBranch 2For
The impedance of primary circuit second branch 32, RBranch 1For the impedance of the primary circuit first branch 31, NBranch 2For primary circuit second branch 32
Coil turn, N2For the coil turn of secondary winding 5.
By formula IBranch 2=IAlways*RBranch 1/(RBranch 1+RBranch 2)；I2=IBranch 2*NBranch 2/N2；Wherein, IBranch 2For primary circuit second branch around
The electric current of group 32, I2The electric current generated for secondary winding 5；I can be obtained2≈23mA。
From the above technical scheme, small-sized network acquires breaker using current divider type current detection mutual inductor 11, expands
The big range of the input current of the power circuit of distribution system, and the primary circuit first branch can be set according to actual needs
31 impedance RBranch 1With the impedance R of primary circuit second branch winding 32Branch 2Between ratio, primary circuit second branch winding 32
Turn number NBranch 2And the turn number N of secondary winding 52Between ratio, so the present invention is applicable in different distribution systems, especially
It is suitable for the biggish distribution systems of output electric current of power circuit.
Preferably, as shown in figure 5, the governor circuit 14 includes that current detection circuit 22, processing circuit 24 and magnetic push away drive
Dynamic circuit 25,
The disconnected brake mechanism 15 that links includes that magnetic infers that lock driving part 16 and disconnected combined floodgate execution unit 17, magnetic infer lock driving portion
Part 16 is connect with disconnected combined floodgate execution unit 17, and each linkage contact 8 is connect with disconnected combined floodgate execution unit 17；
The input with current detection circuit 22 respectively of output wiring terminal 4 of each current divider type current detection mutual inductor 11
End and magnetic push away the input terminal electrical connection of driving circuit 25；
The output end of current detection circuit 22 is electrically connected with the input terminal of processing circuit 24；
The output end of processing circuit 24 is electrically connected with the input terminal that magnetic pushes away driving circuit 25；
Magnetic pushes away the output end of driving circuit 25 and magnetic infers that the input terminal of lock driving part 16 is electrically connected.
Current detection circuit 22 receives the electric current that current divider type current detection mutual inductor 11 transmits, and will test result and be transmitted to
Processing circuit 24；Processing circuit 24 sends execution signal according to testing result and pushes away driving circuit 25 to magnetic, and magnetic pushes away driving circuit 25
The folding of lock driving part 16 and disconnected combined floodgate execution unit 17 control linkage contact 8 is inferred by magnetic.
When a power supply branch overloads, i.e., electric current be more than it is small-sized network the rated current for acquiring breaker when, place
The testing result that reason circuit 24 is transmitted according to current detection circuit 22, delay send driving signal and push away driving circuit 25, magnetic to magnetic
It pushes away driving circuit 25 and infers that lock driving part 16 transmits input current to magnetic, magnetic is inferred that lock driving part 16 closes a floodgate with dynamic circuit breaker and executed
Component 17 makes the disconnection of contact 8 that links, realizes overcurrent protection.Delay time is the preset time of processing circuit 24.
The standard of breaker is acquired according to small-sized network, small-sized network acquires a power supply branch of breaker and (remove
Zero curve power branch) inflow input terminal 6 electric current IAlwaysIt will not thread off when≤1.2In (experimental point 1.13In), i.e., it is small-sized
Can network a power supply branch for acquiring breaker access input terminal 6 electric current IAlwaysConnection is kept when≤1.2In.
As 1.2In < IAlwaysWhen≤2In (experimental point 1.45In), small-sized network acquires breaker meeting delayed tripping, if
Small-sized network acquires rated current In≤63A of breaker, need to thread off in 1 hour, if small-sized network acquires open circuit
When the rated current In > 63A of device, it need to thread off in 2 hours.
As 2In < IAlwaysWhen≤2.8In (experimental point 2.55In), small-sized network acquires breaker meeting delayed releasing, if
It is small-sized network the rated current In≤63A for acquiring breaker when, thread off in 1 second to 60 seconds, if small-sized acquisition of networking
When rated current In > 63A of breaker, thread off in 1 second to 120 seconds.
Wherein, tripping indicates that small-sized network acquires the disconnection of linkage contact 8 of breaker, expression linkage contact 8 of not threading off
Connection, In are that small-sized network acquires the rated current of breaker.
When there is short circuit in a power supply branch, i.e. IAlwaysWhen > 2.8In, processing circuit 24 is passed according to current detection circuit 22
The testing result sent pushes away driving circuit 25 to magnetic and sends driving signal, and magnetic pushes away driving circuit 25 and infers lock driving part 16 to magnetic
Input current is transmitted, magnetic infers lock driving part 16 with dynamic circuit breaker combined floodgate execution unit 17, makes the disconnection of contact 8 that links, realizes short circuit
Protection.
Since each linkage contact 8 is connect with disconnected combined floodgate execution unit 17, as long as so small-sized network acquires open circuit
Overcurrent occurs for a power supply branch in device or short circuit phenomenon, all linkage contacts 8 simultaneously switch off, and improves small-sized network
The reliability of breaker is acquired, and a combined floodgate execution unit can control the opening and closing of the linkage contact 8 of each power supply branch, knot
Structure is compact, occupies little space.And the output wiring terminal 4 of each current divider type current detection mutual inductor 11 is directly inferred with magnetic
The input terminal of lock driving part 16 is electrically connected, and occurs overloading or short circuit in a power supply branch, and governor circuit 14 occur therefore
When barrier, it can also infer that lock driving part 16 and current divider type current detect the circuit between mutual inductor 11 and be sent to magnetic deduction by magnetic
16 driving signal of lock driving part, magnetic infer lock driving part 16 with dynamic circuit breaker combined floodgate execution unit 17, make the disconnection of contact 8 that links,
Realize overcurrent or short-circuit protection；When preventing governor circuit 14 from breaking down, there is the case where short circuit or overcurrent in distribution system, small-sized
It can network and acquire breaker and can not achieve overcurrent or short-circuit protection.
Preferably, the governor circuit 14 further includes the electric-leakage detection circuit being electrically connected with the input terminal of processing circuit 24
20；
Small-sized to network that acquire breaker further include creepage mutual inductor 10, creepage mutual inductor 10 is serially connected with all power supply branches
Linkage contact 8 and corresponding current divider type current detection mutual inductor 11 between；
The output end of creepage mutual inductor 10 infers lock driving part 16 with the input terminal of electric-leakage detection circuit 20 and magnetic respectively
Input terminal electrical connection.
Electric-leakage detection circuit 20 receives the electric current that creepage mutual inductor 10 transmits, and will test result and be transmitted to processing circuit
24, processing circuit 24 pushes away driving circuit 25 to magnetic according to testing result and sends execution signal, and magnetic pushes away driving circuit 25 and pushed away by magnetic
The folding of disconnected lock driving part 16 and disconnected combined floodgate execution unit 17 control linkage contact 8.
When creepage mutual inductor 10, which detects, flows into unequal with outflow electric current between each phase line and zero curve, that is, illustrate circuit
Leaky, the testing result that processing circuit 24 is transmitted according to electric-leakage detection circuit 20 are generated, delay sends driving signal to magnetic
Driving circuit 25 is pushed away, magnetic pushes away driving circuit 25 and infers that lock driving part 16 transmits input current to magnetic, and magnetic infers lock driving part
16 band dynamic circuit breaker combined floodgate execution units 17, make the disconnection of contact 8 that links, realize earth leakage protective.Delay time is the pre- of processing circuit 24
If the time.
The standard of breaker is acquired according to small-sized network, small-sized network acquires the leakage current I of breakerLeakage≤0.5I△n
When, it will not thread off, i.e., small-sized network acquires the leakage current I of the power supply branch of breakerLeakage≤0.5I△nWhen keep connection.
Work as 0.5I△n< ILeakage≤1.5I△n(experimental point 1.5I△n) when, it is small-sized network acquire breaker in 0.3 second take off
Button.
Work as 1.5I△n< ILeakage≤3I△n(experimental point 2I△n) when, small-sized network acquires breaker and threads off in 0.15 second.
Work as ILeakage>3I△n(experimental point 5I△n) when, small-sized network acquires breaker and threads off in 0.004 second.
Wherein, tripping indicates that small-sized network acquires the disconnection of linkage contact 8 of breaker, expression linkage contact 8 of not threading off
Connection, I△nFor specified earth leakage protective electric current.
The output end of creepage mutual inductor 10 directly infers that the input terminal of lock driving part 16 is electrically connected with magnetic, in power supply branch
It leaks electricity, and when the failure of governor circuit 14, is inferred between lock driving part 16 and creepage mutual inductor 10 by magnetic
Circuit is sent to magnetic and infers 16 driving signal of lock driving part, magnetic infer lock driving part 16 with dynamic circuit breaker combined floodgate execution unit 17,
Make the disconnection of contact 8 that links, realizes earth leakage protective；When preventing governor circuit 14 from breaking down, the case where distribution system is leaked electricity,
Small-sized network acquires breaker and can not achieve earth leakage protective.
Preferably, governor circuit 14 further includes the temperature sensing circuit 21 being electrically connected with the input terminal of processing circuit 24, is supplied
Electric branch is equipped with temperature sensor 13, and input terminal of the output end of each temperature sensor 13 with temperature sensing circuit 21 is electrically connected
It connects.
When a power supply branch is due to 6 bad connection of current overload, output terminal 12 or input terminal, the power supply branch
Temperature can constantly increase, and by power supply branch line conductor conduction, be greater than when the received temperature value of temperature sensing circuit 21 or
Equal to preset temperature value, detection circuit will test result and be sent to processing circuit 24, and processing circuit 24 is according to temperature detection electricity
The testing result that road 21 is transmitted sends driving signal to magnetic and pushes away driving circuit 25, and magnetic pushes away driving circuit 25 and infers lock driving to magnetic
Component 16 transmits input current, and magnetic infers lock driving part 16 with dynamic circuit breaker combined floodgate execution unit 17, makes the disconnection of contact 8 that links, real
Existing overheat protector.
Preferably, governor circuit 14 further includes the first voltage detection circuit being electrically connected with the input terminal of processing circuit 24
18；
It is equipped with first voltage detection output 7 between the input terminal 6 and linkage contact 8 of each power supply branch, each
First voltage detection output 7 is electrically connected with the input terminal of first voltage detection circuit 18.
First voltage detection circuit 18 receives the voltage of 7 transmission of first voltage detection output, and will test result biography
It is sent to processing circuit 24；Processing circuit 24 infers lock driving part 16 and the disconnected combined floodgate enforcement division by magnetic according to testing result
The folding of the control linkage of part 17 contact 8.
When the voltage of a phase line power supply branch is more than or less than threshold voltage, processing circuit 24 is according to voltage detecting electricity
The testing result that road 18 is transmitted, delay send driving signal and push away driving circuit 25 to magnetic, and magnetic pushes away driving circuit 25 and infers lock to magnetic
Driving part 16 transmits input current, and magnetic infers that lock driving part 16 with dynamic circuit breaker combined floodgate execution unit 17, keeps linkage contact 8 disconnected
It opens, realizes over-voltage or under-voltage protection.Delay time is the preset time of processing circuit 24, and the threshold voltage of phase line power supply branch is
The predeterminated voltage of first voltage detection circuit 18, and can be preset in processing circuit 24 to control whether to open over-voltage or owe
Pressure protection.
And first voltage detection circuit 18 by first detection output voltage terminals 7 voltage value and preset voltage value into
Row compares, and judges whether to have a power failure, and will test result and send processing circuit 24 to, processing circuit 24 protects testing result
It deposits.
Preferably, governor circuit 14 further includes the second voltage detection circuit being electrically connected with the input terminal of processing circuit 24
19；
It is equipped with second voltage detection output 9 between the linkage contact 8 and creepage mutual inductor 10 of each power supply branch, often
A second voltage detection output 9 is electrically connected with the input terminal of second voltage detection circuit 19.
Whether second voltage detection circuit 19 judges linkage contact 8 by the voltage value of the second detection output voltage terminals 9
Closure, and will test result and send processing circuit 24 to, processing circuit 24 saves testing result.
Preferably, governor circuit 14 further includes radio communication circuit 27 and wire communication circuit 26, processing circuit 24 it is defeated
Outlet is electrically connected with the input terminal of the input terminal of wire communication circuit 26 and radio communication circuit 27 respectively.
It, can be by the data transmission in processing circuit 24 to administrator by wire communication circuit 26 and radio communication circuit 27
Member terminal device, enable administrative staff understand in real time distribution system parameter configuration and to it is small-sized network acquire breaker into
The long-range monitoring of row, and if distribution system is abnormal situation (such as overcurrent or short circuit), it is transmittable to give telecommunication circuit electricity
The warning device of connection, makes warning device alarm.
Preferably, governor circuit 14 further includes power supply circuit 23, and the output end of power supply circuit 23 is defeated with processing circuit 24
Enter end electrical connection.
Power supply circuit 23 is that processing circuit 24 provides working power, and power supply circuit 23 is equipped with battery, for being after having a power failure
Outage information is sent to long-range monitoring by wire communication circuit 26 or radio communication circuit 27 by 24 continued power of processing circuit
Equipment.
Preferably, governor circuit 14 further includes indicator light circuit 28, the input terminal and processing circuit 24 of indicator light circuit 28
Output end electrical connection.
Processing circuit 24 acquires the working condition of breaker and sends a signal to indicator light circuit 28 according to small-sized network, and refers to
Indication lamp circuit 28 can control corresponding indicator light to light, for example small-sized network acquires breaker and be in connected state, and display connects
The indicator light of logical state is just lighted.
Those skilled in the art can be understood that the governor circuit 14 in the embodiment of the present invention can be by software
The mode of necessary common hardware is added to realize, common hardware includes universal integrated circuit, universal cpu, general-purpose storage, general
Component etc. can also include specific integrated circuit, dedicated cpu, private memory, special components and parts etc. by specialized hardware come
It realizes, but the latter is more preferably embodiment in many cases.Based on this understanding, the technical solution in the embodiment of the present invention
Substantially the part that contributes to existing technology can be embodied in the form of software products in other words, the computer software
Product can store in storage medium, such as read-only memory (ROM, Read-Only Memory), random access memory
(RAM, Random Access Memory), magnetic disk, CD etc., including some instructions are used so that a computer equipment (can
To be personal computer, server or the network equipment etc.) execute certain parts of each embodiment of the present invention or embodiment
The method.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (5)
- It is described small-sized to network that acquire breaker include governor circuit (14), linkage 1. a kind of small-sized network acquires breaker Disconnected brake mechanism (15) and multiple power supply branches；Each power supply branch includes input terminal (6), linkage contact (8) and is electrically connected with linkage contact (8) defeated Terminal (12) out；The output end of the governor circuit (14) is electrically connected with the input terminal for linking disconnected brake mechanism (15)；Linkage contact (8) connect with the output end for linking disconnected brake mechanism (15), which is characterized in that the power supply branch It further include current divider type current detection mutual inductor (11)；Current divider type current detection mutual inductor (11) include magnetic core (1), output wiring terminal (4), input wires terminal (2), Primary time for being serially connected in the primary circuit first branch (31) between input wires terminal (2), being wrapped in the magnetic core (1) side Road second branch winding (32) and the secondary winding (5) for being wrapped in the magnetic core (1) other side；The coil turn of the secondary winding (5) is greater than the coil turn of the primary circuit second branch winding (32)；The impedance of the primary circuit second branch winding (32) is greater than the impedance of the primary circuit first branch (31)；The coil turn of the primary circuit second branch winding (32) is an at least circle；Each current divider type current detection mutual inductor (11) is serially connected with corresponding power supply branch by the input wires terminal (2) The linkage contact (8) and the output terminal (12) between, each current divider type current detection mutual inductor (11) it is defeated Connecting terminal (4) is electrically connected with the input terminal of the governor circuit (14) out；The coil turn of the secondary winding (5) and the coil turn of the primary circuit second branch winding (32) are set in proportion It sets；The linkage disconnected brake mechanism (15) includes that magnetic infers that lock driving part (16) and disconnected combined floodgate execution unit (17), the magnetic push away Disconnected lock driving part (16) are connect with the disconnected combined floodgate execution unit (17), each linkage contact (8) with the disconnected conjunction Lock execution unit (17) connection；The governor circuit (14) further includes the second voltage detection circuit (19) being electrically connected with the input terminal of processing circuit (24)；Second voltage detection output is equipped between the linkage contact (8) and creepage mutual inductor (10) of each power supply branch Terminal (9), each second voltage detection output sub (9) are electric with the input terminal of the second voltage detection circuit (19) Connection；The governor circuit (14) includes that current detection circuit (22), processing circuit (24) and magnetic push away driving circuit (25),The output wiring terminal (4) of each current divider type current detection mutual inductor (11) respectively with the current detection circuit (22) input terminal and the magnetic infers the input terminal electrical connection of lock driving part (16)；The output end of the current detection circuit (22) is electrically connected with the input terminal of the processing circuit (24)；The output end of the processing circuit (24) is electrically connected with the input terminal that the magnetic pushes away driving circuit (25)；The magnetic pushes away the output end of driving circuit (25) and the magnetic infers that the input terminal of lock driving part (16) is electrically connected；The governor circuit (14) further includes the electric-leakage detection circuit (20) being electrically connected with the input terminal of the processing circuit (24)；It is described it is small-sized network that acquire breaker further include creepage mutual inductor (10), the creepage mutual inductor (10) is serially connected with all Between the linkage contact (8) and corresponding current divider type current detection mutual inductor (11) of the power supply branch；The output end of the creepage mutual inductor (10) is inferred with the input terminal of the electric-leakage detection circuit (20) and the magnetic respectively The input terminal of lock driving part (16) is electrically connected.
- 2. small-sized network according to claim 1 acquires breaker, which is characterized in that the primary circuit second branch The impedance of winding (32) and the impedance of the primary circuit first branch (31) are arranged in proportion.
- 3. small-sized network according to claim 1 acquires breaker, which is characterized in that the governor circuit (14) is also wrapped The temperature sensing circuit (21) being electrically connected with the input terminal of the processing circuit (24) is included, each power supply branch is equipped with temperature It spends sensor (13), the output end of each temperature sensor (13) is electric with the input terminal of the temperature sensing circuit (21) Connection.
- 4. small-sized network according to claim 1 acquires breaker, which is characterized in that the governor circuit (14) is also wrapped Include the first voltage detection circuit (18) being electrically connected with the input terminal of the processing circuit (24)；First voltage detection output is equipped between the input terminal (6) and the linkage contact (8) of each power supply branch Sub (7), input terminal of each first voltage detection output sub (7) with the first voltage detection circuit (18) are electrically connected It connects.
- 5. small-sized network according to claim 1 acquires breaker, which is characterized in that the governor circuit (14) is also wrapped Include radio communication circuit (27) and wire communication circuit (26), the output end of the processing circuit (24) respectively with the cable modem Believe the input terminal electrical connection of the input terminal and the radio communication circuit (27) of circuit (26).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610532876.XA CN106159894B (en) | 2016-07-07 | 2016-07-07 | Small-sized network acquires breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610532876.XA CN106159894B (en) | 2016-07-07 | 2016-07-07 | Small-sized network acquires breaker |
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| CN106159894A CN106159894A (en) | 2016-11-23 |
| CN106159894B true CN106159894B (en) | 2019-03-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107317398A (en) * | 2017-08-02 | 2017-11-03 | 国网天津市电力公司 | A kind of programmable intelligent air switch |
| CN108242795B (en) * | 2018-02-05 | 2019-10-11 | 深圳曼顿科技有限公司 | Circuit safety management method, breaker and readable storage medium storing program for executing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201174571Y (en) * | 2008-03-31 | 2008-12-31 | 林龙杰 | Micro circuit breaker having micro-computer protection and liquid crystal display |
| CN201242561Y (en) * | 2008-07-04 | 2009-05-20 | 盛弘电气有限公司 | Apparatus for detecting power supply current |
| CN202473797U (en) * | 2011-12-26 | 2012-10-03 | 南京觅丹电子信息有限公司 | Intelligent magnetic maintenance minisize breaker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0798337A (en) * | 1993-09-29 | 1995-04-11 | Urawa Kogyo Kk | Current detector |
| CN201044352Y (en) * | 2006-10-27 | 2008-04-02 | 中山酷特电气有限公司 | Intelligent minitype breaker |
| CN201072426Y (en) * | 2007-08-10 | 2008-06-11 | 吴焕雄 | Checking device for shunting conducting wire |
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2016
- 2016-07-07 CN CN201610532876.XA patent/CN106159894B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201174571Y (en) * | 2008-03-31 | 2008-12-31 | 林龙杰 | Micro circuit breaker having micro-computer protection and liquid crystal display |
| CN201242561Y (en) * | 2008-07-04 | 2009-05-20 | 盛弘电气有限公司 | Apparatus for detecting power supply current |
| CN202473797U (en) * | 2011-12-26 | 2012-10-03 | 南京觅丹电子信息有限公司 | Intelligent magnetic maintenance minisize breaker |
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| CN106159894A (en) | 2016-11-23 |
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