CN109342794A - Switching device, electric energy meter take control system and its control method - Google Patents

Switching device, electric energy meter take control system and its control method Download PDF

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Publication number
CN109342794A
CN109342794A CN201810974464.0A CN201810974464A CN109342794A CN 109342794 A CN109342794 A CN 109342794A CN 201810974464 A CN201810974464 A CN 201810974464A CN 109342794 A CN109342794 A CN 109342794A
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CN
China
Prior art keywords
control
circuit
magnetic latching
latching relay
signal
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Pending
Application number
CN201810974464.0A
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Chinese (zh)
Inventor
于雪峰
王景凯
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Zhejiang Chint Electrics Co Ltd
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Zhejiang Chint Electrics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Zhejiang Chint Electrics Co Ltd filed Critical Zhejiang Chint Electrics Co Ltd
Priority to CN201810974464.0A priority Critical patent/CN109342794A/en
Publication of CN109342794A publication Critical patent/CN109342794A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R11/00Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/56Special tariff meters
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/04Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423Input/output

Abstract

A kind of switching device includes control module and several magnetic latching relays, the control module is for receiving control signal and controlling magnetic latching relay divide-shut brake, the control module includes control circuit, for receiving the control signal receiving circuit of control signal, driving circuit for driving magnetic latching relay to act, current detection circuit and power failure detection circuit, current detection component is provided in the magnetic latching relay, current detection circuit is connected between current detection component and control circuit, power failure detection circuit is used to detect the phases line voltage of magnetic latching relay inlet wire side and the voltage signal that will test is exported to control circuit, the on-off of magnetic latching relay connection electric line and control electric line.The invention further relates to a kind of electric energy meters including above-mentioned switching device to take control system and the control method of the system.

Description

Switching device, electric energy meter take control system and its control method
Technical field
The present invention relates to a kind of electric energy meter technical field, more particularly, to a kind of switching device, electric energy meter take control system and Its control method.
Background technique
Currently, the electric energy meter expense control system in power grid mainly include by electric energy meter and external breaker, external breaker by Control the intelligence expense control function that arrearage automatic brake separating, the automatic closing that continues to pay dues are realized in electric energy meter.External breaker by control circuit, Motor drive module, motor, position detecting circuit, transmission mechanism, breaker composition.Wherein, control circuit receives electric energy meter Motor-drive circuit is sent instructions to after expense control signal, control motor rotation drives transmission mechanism to complete the divide-shut brake of breaker, Realize the function of arrearage separating brake, the combined floodgate that continues to pay dues.Wherein transmission mechanism needs to have enough intensity, and motor needs to supply enough Power could reliable operation, lead to electric energy meter expense control system structure and assembly technology be complicated and power consumption is big.
Summary of the invention
The present invention is mainly to solve electric energy meter in the prior art to take control system structure and assembly technology complexity and power consumption greatly Problem provides a kind of switching device, electric energy meter expense control system and its control method.Relay is kept using magnetic in switching device Device can save the energy.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals: a kind of switching device, institute Stating switching device includes control module and several magnetic latching relays, and the control module is for receiving control signal and controlling Magnetic latching relay divide-shut brake, the control module include control circuit, the control signal reception electricity for receiving control signal Road, driving circuit, current detection circuit and power failure detection circuit for driving magnetic latching relay to act, the magnetic are kept Current detection component is provided in relay, current detection circuit is connected between current detection component and control circuit, power-off Detection circuit is used to detect the phases line voltage of magnetic latching relay inlet wire side and the voltage signal that will test is exported to control Circuit, the on-off of magnetic latching relay connection electric line and control electric line.It is provided in the present invention and keeps relay with magnetic The control module that device matches realizes that intelligence takes the function of control, instead of the external breaker circuit of existing electric energy meter, without adopting Breaker is driven with motor-drive circuit, it is more energy saving, it reduces costs.The present invention controlled by driving circuit after Electric appliance set and reset need to only add pulse when work, then be not necessarily to any driving, energy be greatly saved, reduce consumption.
As a preferred embodiment, the current detection component includes detection resistance or current transformer, control circuit root Operation is carried out according to detection resistance or the collected voltage/current signals of current transformer and whether judgement is overloaded or short with electric line Road.This programme detect control circuit can also to the electric current on magnetic latching relay, by control circuit according to current potential Difference calculates the current value of each phase, and short circuit and overload protection function may be implemented.
As a preferred embodiment, the control module further includes condition indication circuit, condition indication circuit connection control Circuit and the opening and closing state for being used to indicate magnetic latching relay.
As a preferred embodiment, the control module further include manual/auto operation mode selection switch and manually by Button, manual/auto operation mode selection switch connects control circuit with hand push button, when user passes through manual/auto operation mould When formula selection switch selection automatic operation mode, control circuit controls magnetic latching relay division according to the control signal received Lock;When user is by manual/auto operation mode selection switch selection manual operation mode, user can operate hand push button, Control circuit controls magnetic latching relay divide-shut brake to the operation of hand push button according to user.Pass through manual/auto operation mode Selection switch provides the selection of manually and automatically control function.When selecting manual, control circuit, control circuit are transmitted a signal to The expense control signal from electric energy meter is not handled, and the on-off of magnetic latching relay is by manual operation.When selecting automatic, magnetic is kept The on off operating mode of relay is controlled automatically by the expense control signal of electric energy meter, i.e. arrearage separating brake, and continue to pay dues automatic closing.By pressing manually Button realizes the control of magnetic latching relay contact, transmits a signal to control circuit after pressing hand push button, is controlled by control circuit Operation.In the case that power grid has electricity, non-arrearage, user can realize magnetic latching relay contact by hand push button On-off control, when arrearage occurs, do not close a floodgate user presses hand push button.
As a preferred embodiment, when controlling signal is predetermined value, control circuit is limited according to user to pressing manually The operation of button controls magnetic latching relay divide-shut brake.
As a preferred embodiment, the control module and the magnetic latching relay all have the shell of unit construction The shell of body, control module and magnetic latching relay is riveted together.
The present invention also provides a kind of electric energy meters to take control system, and the switching device connects an electric energy meter, and switching device receives Control signal from electric energy meter simultaneously controls magnetic latching relay divide-shut brake according to control signal.
As a preferred embodiment, the control module of the switching device further includes feed circuit, the feed circuit Input terminal connects the terminal block end of magnetic latching relay, and output end connects control circuit and electric energy meter.Feed circuit input terminal It is connected to the leading-out terminal i.e. terminal block end of magnetic latching relay and load connection, feed circuit is for acquiring magnetic latching relay Then the three phase mains signal of leading-out terminal feeds back to electric energy meter, the work of control circuit feedback control circuit.
The present invention also provides a kind of electric energy meters to take control system control method, comprising:
To the system electrification, control circuit receives the control signal from electric energy meter, control by control signal receiving circuit Circuit by current detection circuit and current detection component acquisition flow through magnetic latching relay current signal with judge magnetic keep after The loading condition of electric appliance, and the phases line voltage of magnetic latching relay inlet wire side is detected to judge electricity consumption by power failure detection circuit Whether route has electricity;
When the control signal that control circuit receives is arrearage signal, control circuit controls magnetic latching relay separating brake, disconnects Use electric line;
When the control signal that control circuit receives is to continue to pay dues signal, control circuit controls magnetic latching relay and closes a floodgate, closure Use electric line.
As a preferred embodiment, control method further include:
If control circuit judges electricity consumption circuit overload or the short circuit of magnetic latching relay load end, control circuit output signal control Magnetic latching relay separating brake processed;
If being kept the opening and closing state of magnetic latching relay constant without electricity with electric line, if having electricity with electric line, controlling electricity Road controls magnetic latching relay divide-shut brake according to the control signal of electric energy meter.
Therefore, the invention has the advantages that
It is provided with the control module matched with magnetic latching relay, realizes that intelligence takes the function of control, instead of existing electric energy Off-balancesheet sets breaker circuit, drives without motor-drive circuit to breaker, more energy saving, reduces costs.
Control relay set and reset by driving circuit, when work need to only add pulse, then be not necessarily to any drive It is dynamic, energy is greatly saved, reduces consumption.
Detailed description of the invention
Fig. 1 is a kind of structural framing schematic diagram for taking control system in the present invention;
Fig. 2 is a kind of schematic diagram of internal structure of magnetic latching relay in switching device of the present invention;
Fig. 3 is a kind of schematic diagram of internal structure of control module in switching device of the present invention;
Fig. 4 is the structural schematic diagram that control module and magnetic latching relay are riveted together in switching device of the present invention;
Fig. 5 is the electrical block diagram of the first embodiment of the driving circuit of control module in switching device of the present invention;
Fig. 6 is the electrical block diagram of the second embodiment of the driving circuit of control module in switching device of the present invention.
1- electric energy meter 2- control module 3- magnetic latching relay 4- controls signal receiving circuit 5- control circuit 6- and drives Dynamic circuit 7- coil 8- current detection component 9- current detection circuit 10- condition indication circuit 11- power failure detection circuit The manual/auto operation mode of 12- selects switch 13- hand push button 14- feed circuit 20- control module shell 30- shell 31- static contact 32- static contact terminal plate 33- moving contact 34- moving contact terminal plate 35- connecting terminal 36- armature component Yoke 372- lower yoke on 37- yoke component 361- armature 362- armature bracket 363- pushing plate 371-.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment:
A kind of electric energy meter takes control system, as shown in Figure 1, including electric energy meter 1 and switching device, switching device includes control module 2 And magnetic latching relay 3, wherein the quantity of magnetic latching relay 3 can be one or more.Magnetic latching relay 3 is connected to use In electric line, the on-off with electric line can be controlled by combined floodgate to sound contact in magnetic latching relay 3 or sub-switching operation. Control module 2 is connected between electric energy meter 1 and magnetic latching relay 3, and control module 2 receives the control signal from electric energy meter 1, And 3 divide-shut brake of magnetic latching relay is controlled according to control signal.Wherein control signal can be arrearage signal or the signal that continues to pay dues, when When control signal is arrearage signal, control module 2 controls 3 separating brake of magnetic latching relay, and electric line is used in disconnection;When control signal is Continue to pay dues signal when, control module 2 control magnetic latching relay 3 close a floodgate, closure use electric line.Control module 2 includes control circuit 5, signal receiving circuit 4, driving circuit 6 are controlled, wherein the control signal in control module 2 receives circuit 4 from electric energy meter 1 Control circuit 5 is outputed signal to after receiving control signal, control circuit 5 handles the signal received, exports after operation For signal to driving circuit 6, driving circuit 6 controls the divide-shut brake movement of magnetic latching relay 3.Control circuit 5 includes power circuit And microcontroller, power circuit provide power supply for microcontroller.
Control module 2 further includes current detection circuit 9, and magnetic latching relay 3 includes coil 7 and current detection component 8, line The driving circuit 6 of 7 link control modules 2 is enclosed, current detection circuit 9 is connected between current detection component 8 and control circuit 5, Current detection component 8 can be current transformer or detection resistance, such as copper-manganese resistance.Wherein, the acquisition of current detection component 8 stream Current signal through magnetic latching relay 3, and collected current signal is exported to current detection circuit 9, current detecting electricity To control circuit 5 is outputed signal to after current signal processing, control circuit 5 is collected according to current detection circuit 9 on road 9 Voltage/current signals are handled, operation and the loading condition that magnetic latching relay 3 is judged with this, that is, judge that magnetic keeps relay 3 load end of device whether overloaded with electric line or short circuit.Specifically, when the current signal that current detection component 8 detects is lower than When predetermined value, then judge that magnetic latching relay 3 is in normal load state;When the current signal that current detection component 8 detects When higher than predetermined value, then the overload of magnetic latching relay 3 or short circuit are judged, and control after judging electricity consumption circuit overload or short circuit 3 separating brake of magnetic latching relay, to realize to the overload or short-circuit protection with electric line.Specifically, when control circuit 5 judges electricity The signal that current detection circuit 9 detects is more than predetermined value in the given time, then judges electricity consumption circuit overload or short circuit, and export Signal to driving circuit 6, driving circuit 6 drives 3 separating brake of magnetic latching relay.
Control module 2 further includes power failure detection circuit 11, and power failure detection circuit 11 connects control circuit 5.Outage detection electricity Road 11 connects the side of magnetic latching relay end of incoming cables, for detecting the phases line voltage of inlet wire side, and the voltage that will test To control circuit 5, whether control circuit 5 has electricity according to the signal judgement electric line received for output after signal processing.Work as control The control signal that circuit 5 processed receives is arrearage signal, and when electricity no with electric line, then keep point of magnetic latching relay 3 "on" position is constant, if having electricity with electric line, controls 3 separating brake of magnetic latching relay.When the control letter that control circuit 5 receives Number to continue to pay dues signal, and when with electric line without electricity, then keep the opening and closing state of magnetic latching relay 3 constant, if using electric wire Lu You electricity then controls the combined floodgate of magnetic latching relay 3.In this way, control circuit 5 judges magnetic when receiving control signal, in addition to detecting Outside the opening and closing state of guard relay 3, can also detect whether judgement electric line has electricity, further ensure that magnetic keep after The reliability of the operation of electric appliance 3.
Control module 2 further includes feed circuit 14, and feed circuit 14 is connected between electric energy meter 1 and magnetic latching relay 3, Feed circuit 14 obtains the voltage signal at acquisition terminal block end from the leading-out terminal of magnetic latching relay 3, and will be at voltage signal Output signal to electric energy meter 1 after reason, electric energy meter 1 with this judge the opening and closing state after magnetic latching relay 3 acts whether with control Signal Matching processed.When the control signal that electric energy meter 1 exports is arrearage signal, if the voltage signal that feed circuit 14 is got is super Predetermined value is crossed, then electric energy meter 1 judges that magnetic latching relay 3 is in "on" position, i.e. magnetic latching relay 3 is used without normally disconnecting Electric line or possibility there are stealing, electric energy meter 1 is alarmed at this time.When the control signal that electric energy meter 1 exports is to continue to pay dues signal, If the voltage signal that feed circuit 14 is got is lower than predetermined value, electric energy meter 1 judges that magnetic latching relay 3 is in separating brake shape State, i.e. magnetic latching relay do not have a normally closed circuit, after subscriber payment still can not normal electricity consumption, electric energy meter 1 alarms.In addition, Feed circuit 14 is also connected with control circuit 5, and feed circuit 14, will after the voltage that magnetic latching relay 3 obtains terminal block end Control circuit 5 is outputed signal to after voltage signal processing, control circuit 5 judges the opening and closing state of magnetic latching relay 3 with this, Judge magnetic latching relay 3 either with or without after control circuit 5 sends a signal to driving circuit 6 under the control of driving circuit 6 Normally complete divide-shut brake movement.
Control module 2 further includes manual/auto operation mode selection switch 12 and hand push button 13, manual/auto operation Mode selection switch 12 and hand push button 13 are connected to control circuit 5, and user can select to open by manual/auto operation mode It closes 12 switching manual operation modes or is automatically brought into operation operation.In the manual operating mode, user can be controlled by hand push button 13 3 divide-shut brake of magnetic latching relay processed.In addition, that is, electric energy meter 1 is to the control signal that control module 2 issues if subscriber arrearage Arrearage signal, user can not control magnetic latching relay divide-shut brake by hand push button 13, i.e., announcement user passes through manual/auto Operation mode selection switch 12 has selected manual operation mode, and the control circuit 5 of control module 2 will not respond user to manual The operation of button 13 and control 3 divide-shut brake of magnetic latching relay, at this time control circuit 5 be only in response to electric energy meter 1 output control Signal.Under automatic operation mode, user can not control 3 divide-shut brake of magnetic latching relay by hand push button 13, at this point, control Circuit 5 controls 3 divide-shut brake of magnetic latching relay according to the control signal of electric energy meter 1.
Control module 2 further includes condition indication circuit 10, and condition indication circuit 10 connects control circuit 5, and control circuit 5 is defeated Signal is to condition indication circuit 10 out, and condition indication circuit 10 is according to the opening and closing state of signal designation magnetic latching relay.
As shown in Fig. 2, magnetic keeps relay for the schematic diagram of internal structure of magnetic latching relay 3 in switching device of the present invention The shell mechanism of device 3 is unit construction identical with housing of mini-type circuit breaker structure in the art.Magnetic latching relay 3 includes Shell 30, static contact 31, static contact terminal plate 32, moving contact 33, moving contact terminal plate 34, connecting terminal 35, armature component 36, Yoke component 37, coil 7 and current detection component 8.Wherein, shell 30 is unit construction, and the shell 30 includes left and right sides Plate, upper and lower side plate and front and back side plate (one in the side plate of front and back is only shown in figure) divide on the inside of the left side plate of shell It is not provided with a connecting terminal 35, the intermediate position of lower side panel forms a recessed portion to recess on the inside of shell 30, by this Shell 30 can be fixed in outer rail by recessed portion, the intermediate position of epipleural support or oppose the direction from lower side panel protrusion.It is quiet Contact 31, moving contact 33, armature component 36, yoke component 37 and coil 7 are arranged close to after epipleural outwardly protrudes in shell In the accommodation space that 30 insides are formed.Yoke component 37 include across coil 7 iron core (not shown) and be located at line The upper yoke 371 and lower yoke 372 of 7 upper and lower ends are enclosed, upper yoke 371 and lower yoke 372 are contacted or are integrally formed with iron core.Rank Iron component 36 includes armature 361, armature bracket 362 and pushing plate 363, and armature 361 is installed in the left and right two of armature bracket 362 Side, armature bracket 362 are installed on shell 30 and can rotate around carriage center.363 one end of pushing plate connects armature bracket 362, The other end connects moving contact 33.Armature 361 is attracted and rotated by yoke component 37 after coil 7 is powered, and drives armature bracket 362 Rotation, to push pushing plate 363, pushing plate 363 drives moving contact 33 to contact or separate with static contact 31, i.e. control magnetic is kept Relay 3 closes a floodgate or separating brake.As shown in Figure 1, the driving circuit 6 in 7 link control module 2 of coil, driving circuit 6 gives coil 7 Power supply.Static contact 31 is connected to by static contact terminal plate 32 and connecting terminal 35 with electric line, and moving contact 33 passes through moving contact Terminal plate 34 and connecting terminal are connected to electric line, and contacting or separate with static contact 31 by controlling moving contact 33 can control With the on-off of electric line.In the present embodiment, current detection component 8 includes detection resistance, and detection resistance is connected to moving contact On terminal plate 34, detection resistance is connected to current detection circuit 9 as shown in Figure 1 and feedback by conducting wire (not shown) The current signal that circuit 14 will test flow through magnetic latching relay 3 is exported to current detection circuit 9 and feed circuit 14. It is understood that current detection component 8 can also use current transformer, connect by the way that current transformer is set in moving contact The acquisition of current signal is realized on line plate 34 or static contact terminal plate 32.
As shown in figure 3, the shell mechanism of the control module 2 is mould similar with the shell mechanism of magnetic latching relay 3 Numberization structure, control module 2 are installed in control module shell 20.
As shown in figure 4, the shell 30 of the control module shell 20 of control module 2 and magnetic latching relay 3 passes through rivet riveting It is connected together.
As shown in figure 5, for the circuit of the first embodiment of the driving circuit 6 of control module 2 in switching device of the present invention Schematic diagram, in the present embodiment, the coil of magnetic latching relay 3 use unicoil, including coil L1, and driving circuit includes electricity Hinder R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, triode Q1, triode Q2, three poles Pipe Q3, triode Q4, triode Q5, triode Q6, the one end resistance R1 connect power supply, and the resistance R1 other end is connected respectively to resistance The one end R5 and triode Q1 collector, triode Q1 base stage connect the one end resistance R3, and the resistance R3 other end connects control circuit 5 First control signal output end P1, triode Q1 emitter are separately connected the base stage of the one end resistance R4 and triode Q2, resistance R4 The other end ground connection, triode Q2 collector connect coil L1 first end A, triode Q2 emitter ground connection, the resistance R5 other end with The connection of triode Q5 base stage, the emitter of triode Q5 connect power supply VCC, and triode Q5 collector connects coil L1 second end B, The one end resistance R2 connects power supply VCC, and the resistance R2 other end is connected respectively to the one end resistance R6 and triode Q4 collector, triode Q4 base stage connects the one end resistance R8, and the resistance R8 other end connects second control signal the output end P2, triode Q4 of control circuit 5 Emitter is separately connected the base stage of the one end resistance R7 and triode Q3, resistance R7 other end ground connection, the connection of triode Q3 collector Coil L1 second end B, triode Q3 emitter ground connection, the resistance R6 other end are connect with triode Q6 base stage, the hair of triode Q6 Emitter-base bandgap grading connects power supply VCC, and triode Q6 collector connects coil L1 first end A.Driving circuit 6 is controlled by control circuit 5 first Signal output end P1 and second control signal output end P2 issues control signal, when second control signal output end P2 is high level There is forward current in coil L1, has reverse current in coil L1 when first control signal output end P1 is high level.When the second control Signal output end P2 processed is high level, when first control signal output end P1 is low level, triode Q3, Q4, Q6 conducting, and three poles The turn-on time of pipe Q3, Q4, Q6 are preferably greater than 200ms, and triode Q1, Q2, Q5 end, the electric current side of flowing through coil L1 To for power supply VCC-triode Q6-coil L1 first end-coil L1 second end-triode Q3-ground, relay coil is obtained After taking pulse signal, relay set.When second control signal output end P2 is low level, first control signal output end P1 is When high level, triode Q1, Q2, Q5 conducting, the turn-on time of triode Q1, Q2, Q5 are preferably greater than 200ms, and three poles Pipe Q3, Q4, Q5 cut-off, the current direction of flowing through coil L1 are power supply VCC-triode Q5-coil L1 second end-coil L1 First end-triode Q2-ground, after relay coil obtains pulse signal, relay resets.When second control signal output end P2 is low level, and when first control signal output end P1 is low level, triode all ends, coil L1 no current.
As shown in fig. 6, being the electricity of the second embodiment of the driving circuit 6 of control module 2 in switching device of the present invention Road schematic diagram, in the present embodiment, the coil of magnetic latching relay 3 use twin coil, including coil L2 and coil L3, Driving circuit 6 includes resistance R9, resistance R10, triode Q7, triode Q8, and the one end coil L2 connects power supply, the coil L2 other end Connecting triode Q7 collector, triode Q7 base stage connect the one end resistance R9, and the resistance R9 other end connects control circuit first and controls Signal output end P1 processed, triode Q9 emitter ground connection, the one end coil L3 connects power supply, coil L3 other end connecting triode Q8 Collector, triode Q8 base stage connect the one end resistance R10, and the resistance R10 other end connects the output of control circuit second control signal Hold P2, triode Q8 emitter ground connection.Its coil L2 is resetting coil, and coil L3 is set coil.Control circuit first is controlled Signal output end P1 and second control signal output end P2 processed issue control signal, when second control signal output end is high level There is electric current in coil L3, has electric current in coil L2 when first control signal output end position high level.Specifically, when the second control letter Number output end P2 is high level, when first control signal output end P1 is low level, triode Q8 conducting, and the conducting of triode Q8 Time is preferably greater than 200ms, triode Q7 cut-off, and current direction is power supply VCC-coil L3-triode Q8-ground.When Second control signal output end P2 is low level, when first control signal output end P1 is high level, triode Q7 conducting, and three poles The turn-on time of pipe Q7 is preferably greater than 200ms, triode Q8 cut-off, and current direction is power supply VCC-pole coil L2-tri- Pipe Q7-ground.When second control signal output end P2 is low level, and first control signal output end P1 is low level, triode All end, the equal no current of coil.
The electric energy meter of the embodiment of the present invention as shown in Figure 1 takes control system, and control method is to take control to the electric energy meter System electrification, after powering on, control module 2 receives the control signal from electric energy meter 1, and detects the division of magnetic latching relay 3 The phases line voltage of 3 inlet wire side of lock state and magnetic latching relay is to judge whether there is electricity with electric line.Specifically, control module 2 by control signal receiving circuit 4 receive the control signal from electric energy meter 1, control signal be arrearage signal or the signal that continues to pay dues, Control signal receiving circuit 4 outputs signal to control circuit 5,5 pairs of control circuit receptions after receiving the control signal of electric energy meter 1 To signal carry out outputing signal to driving circuit 6 after processing operation, driving circuit 6 controls the divide-shut brake of magnetic latching relay 3 Movement.Specifically, the signal judgement electric wire that control module 2 can also be detected by control circuit 5 and current detection circuit 9 Road whether overload or short circuit, and judgement occur overload or short circuit when send driving signal to driving circuit 5 control magnetic keep after 3 separating brake of electric appliance, to realize to the overload and short-circuit protection with electric line.Specifically, the current detection circuit in control module 2 9 obtain the current signal that current detection component 8 acquires, and control circuit 5 is outputed signal to after current signal is handled, if electric current The collected current signal of detection components 8 is more than predetermined value, then judges that magnetic latching relay 3 is in overload or short-circuit condition, and Relay separating brake is controlled after judging electricity consumption circuit overload or short circuit;If the collected current signal of current detection component 8 is lower than Predetermined value then judges that magnetic latching relay 3 is in normal operating conditions.Specifically, control module 2 by control circuit 5 and is broken The detection of power detection circuit 11 judges the phases line voltage of 3 phase line side of magnetic latching relay, and exports letter after voltage signal is handled Number to control circuit 5, control circuit 5 judges whether there is electricity with electric line with this, if judgement electric line keeps magnetic to protect without electricity It is constant to hold 3 opening and closing state of relay, if judgement electric line has an electricity, control circuit 5 is according to the control signal control of electric energy meter 1 3 divide-shut brake of magnetic latching relay processed.Specifically, the feed circuit 14 in control module 2 is connected to electric energy meter 1 and magnetic keeps relay Between device 3, the input terminal of feed circuit 14 is handled voltage signal simultaneously after obtaining voltage of the magnetic latching relay for end Output signal to electric energy meter 1, electric energy meter 1 with this judge magnetic latching relay 3 opening and closing state whether with control Signal Matching, When the control signal of electric energy meter 1 is arrearage signal, if the voltage signal got is more than predetermined value, judge that magnetic keeps relay Device 3 is in "on" position, and electric energy meter 1 is alarmed;When the control signal of electric energy meter 1 is to continue to pay dues signal, if the voltage letter got Number it is lower than predetermined value, then judges that magnetic latching relay 3 be in gate-dividing state, electric energy meter is alarmed.In addition, feed circuit 14 is also in succession To control circuit 5, the feed circuit 14 acquires the voltage signal for flowing through 3 terminal block end of magnetic latching relay, and will be described Control circuit 5 is outputed signal to after voltage signal processing, control circuit 5 judges the opening and closing state of magnetic latching relay 3 with this. In addition, the control when user selects switch 12 to select manual operation mode by manual/auto operation mode, in control module 2 Circuit 5 processed controls 3 divide-shut brake of magnetic latching relay to the operation of hand push button 13 according to user;When user is by manual/auto When operation mode selects switch 13 to select automatic operation mode, control module 2 controls magnetic according to the control signal of electric energy meter 1 and keeps 3 divide-shut brake of relay.Specifically, when controlling signal is arrearage signal, control circuit 5 in control module 2 by limitation according to User controls 3 divide-shut brake of magnetic latching relay to the operation of hand push button 13.In addition, condition indication circuit 10 indicate magnetic keep after The opening and closing state of electric appliance 3, after the state of magnetic latching relay 3 changes, condition indication circuit 10 can indicate that magnetic is protected in time Hold the opening and closing state after relay 3 changes.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Although the terms such as electric energy meter, control module, magnetic latching relay are used more herein, use is not precluded A possibility that other terms.The use of these items is only for be more convenient to describe and explain essence of the invention;Them Being construed to any additional limitation is disagreed with spirit of that invention.

Claims (10)

1. a kind of switching device, it is characterised in that: the switching device includes control module and several magnetic latching relays, institute State control module for receive control signal and control magnetic latching relay divide-shut brake, the control module include control circuit, For receiving control signal receiving circuit, the driving circuit for driving magnetic latching relay to act, electric current inspection of control signal Slowdown monitoring circuit and power failure detection circuit are provided with current detection component, current detection circuit connection in the magnetic latching relay Between current detection component and control circuit, power failure detection circuit is used to detect the phase line electricity of magnetic latching relay inlet wire side It presses and the voltage signal that will test is exported to control circuit, magnetic latching relay connection electric line and control electric line On-off.
2. switching device according to claim 1, which is characterized in that the current detection component includes detection resistance or electricity Current transformer, control circuit carry out operation according to detection resistance or the collected voltage/current signals of current transformer and judge Whether overloaded with electric line or short-circuit.
3. switching device according to claim 1, it is characterized in that the control module further includes condition indication circuit, state Indicating circuit connection control circuit and the opening and closing state for being used to indicate magnetic latching relay.
4. switching device according to claim 1, which is characterized in that the control module further includes manual/auto operation Mode selection switch and hand push button, manual/auto operation mode selection switch connect control circuit with hand push button, work as user When selecting switch selection automatic operation mode by manual/auto operation mode, control circuit is according to the control signal received Control magnetic latching relay divide-shut brake;When user is by manual/auto operation mode selection switch selection manual operation mode, User can operate hand push button, and control circuit controls magnetic latching relay divide-shut brake to the operation of hand push button according to user.
5. switching device according to claim 4, which is characterized in that when controlling signal is predetermined value, control circuit quilt Limitation controls magnetic latching relay divide-shut brake to the operation of hand push button according to user.
6. switching device according to claim 1, which is characterized in that the control module and the magnetic latching relay are equal The shell of shell with unit construction, control module and magnetic latching relay is riveted together.
7. a kind of electric energy meter takes control system, including switching device as claimed in any one of claims 1 to 6, it is characterised in that: described Switching device connects an electric energy meter, and switching device receives the control signal from electric energy meter and kept according to control signal control magnetic Relay divide-shut brake.
8. electric energy meter according to claim 7 takes control system, which is characterized in that the control module of the switching device is also wrapped Include feed circuit, the terminal block end of the input terminal connection magnetic latching relay of the feed circuit, output end connection control electricity Road and electric energy meter.
9. a kind of electric energy meter takes control system control method, control system is taken using the electric energy meter of claim 7, which is characterized in that packet It includes:
To the system electrification, control circuit receives the control signal from electric energy meter, control by control signal receiving circuit Circuit by current detection circuit and current detection component acquisition flow through magnetic latching relay current signal with judge magnetic keep after The loading condition of electric appliance, and the phases line voltage of magnetic latching relay inlet wire side is detected to judge electricity consumption by power failure detection circuit Whether route has electricity;
When the control signal that control circuit receives is arrearage signal, control circuit controls magnetic latching relay separating brake, disconnects Use electric line;
When the control signal that control circuit receives is to continue to pay dues signal, control circuit controls magnetic latching relay and closes a floodgate, closure Use electric line.
10. electric energy meter according to claim 9 takes control system control method, which is characterized in that control method further include:
If control circuit judges electricity consumption circuit overload or the short circuit of magnetic latching relay load end, control circuit output signal control Magnetic latching relay separating brake processed;
If being kept the opening and closing state of magnetic latching relay constant without electricity with electric line, if having electricity with electric line, controlling electricity Road controls magnetic latching relay divide-shut brake according to the control signal of electric energy meter.
CN201810974464.0A 2018-08-24 2018-08-24 Switching device, electric energy meter take control system and its control method Pending CN109342794A (en)

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