CN108322202A - It is a kind of based on coupling negative pressure circuit composite switch and device, protection system - Google Patents
It is a kind of based on coupling negative pressure circuit composite switch and device, protection system Download PDFInfo
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- CN108322202A CN108322202A CN201810008983.1A CN201810008983A CN108322202A CN 108322202 A CN108322202 A CN 108322202A CN 201810008983 A CN201810008983 A CN 201810008983A CN 108322202 A CN108322202 A CN 108322202A
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- Prior art keywords
- switch
- branch
- circuit
- power supply
- negative pressure
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K2017/515—Mechanical switches; Electronic switches controlling mechanical switches, e.g. relais
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention proposes a kind of composite switch circuit and converting switch device, protection system based on coupling negative pressure circuit, wherein the composite switch circuit includes, mechanical switch branch, change of current branch and energy absorption branch；The change of current branch include main solid-state switch branch and with the main solid-state switch branch is concatenated couples negative pressure circuit.The composite switch circuit based on coupling negative pressure circuit of the present invention has the characteristics that reliability simple for structure is high, and easy to control.
Description
Technical field
The present invention relates to power electronics field more particularly to a kind of composite switch electricity based on coupling negative pressure circuit
Road and automatic transfer switch device, power supply switch protecting system.
Background technology
Currently there is a kind of automatic charging type to force zero passage high voltage DC breaker (referring to patent CN105186443A), it is this
Breaker has used high-speed switch unit, energy-absorbing unit, mutual reactor unit, commutation capacitor unit and major loop disconnecting switch
Unit.Automatic charging type as shown in Figure 1 forces the physical circuit figure of zero passage high voltage DC breaker, the first disconnecting switch K1 with
High-speed switch CB, primary side winding L1, the second disconnecting switch K2 are sequentially connected in series, and energy-absorbing unit MOV is in parallel with high-speed switch CB, charging
Switch K3 and commutation capacitor C, vice-side winding L2 are sequentially connected in series, and one end is connect with high-speed switch CB input terminals, the other end with it is fast
Fast switch CB output ends connection.
This automatic charging type forces zero passage high voltage DC breaker, and precharge device is small, the triggering of change of current branch is opened
Pass rate request is low, control is simple, can cut-off the fault current of either direction.It is complicated, reliable but there is circuit structures
Property it is low, and be unfavorable for opening a sluice gate/shutting-brake control, switch is slower.
Invention content
In order to solve the above technical problem, the present invention provides it is a kind of based on coupling negative pressure circuit composite switch circuit and
Automatic transfer switch device, power supply switch protecting system.
The present invention provides a kind of composite switch circuits based on coupling negative pressure circuit, which is characterized in that
The composite switch circuit includes mechanical switch branch, change of current branch and energy absorption branch；Wherein,
The change of current branch include main solid-state switch branch and with the main solid-state switch branch it is concatenated couple negative pressure electricity
Road.
Further, the mechanical switch branch, energy absorption branch are connected with the change of current branch circuit parallel connection.
Further, the negative pressure circuit includes coupling coil, thyristor and discharge capacity.
Further, the first winding of coupling coil of the coupling negative pressure circuit is located at the main solid-state switch branch；Institute
The second winding for stating coupling coil is located at the coupling negative pressure circuit, and the thyristor, discharge capacity with described second around
Group forming circuit.
Further, the capacitance is powered by DC power supply circuit.
Further, the mechanical switch branch includes mechanical switch；And/or
The main solid-state switching circuits include a solid-state switch or multiple concatenated solid-state switches；And/or
The energy absorption branch includes arrester.
The present invention also provides a kind of automatic transfer switch devices, which is characterized in that the automatic transfer switch device packet
Include main switching switch block and standby switching switch block, wherein
The main switching switch block includes three as above any composite switch based on coupling negative pressure circuit
Circuit is respectively used in the A phase, B phase, C phase branch of three-phase electricity；
The standby switching switch block includes three as above any composite switch based on coupling negative pressure circuit
Circuit is respectively used in the A phase, B phase, C phase branch of three-phase electricity.
The present invention also provides a kind of power supply switch protecting systems, which is characterized in that
The power protection switching system includes：
Working power and stand-by power supply；
Automatic transfer switch device as described above, the main switching switch block in the automatic transfer switch device and work
Make power supply connection, standby switching switch block is connect with stand-by power supply；
Monitoring system, the working condition for monitoring power supply and/or stand-by power supply；
Control protection system, for controlling main switching switch block and/or standby switching in the automatic transfer switch device
Switch block separating brake, and/or for controlling main switching switch block and/or standby switching switch in the automatic transfer switch device
Component closes a floodgate.
Further, the monitoring system is additionally operable to the information of the working condition being sent to control protection system
System, the Control protection system according to described information control the automatic transfer switch device the main switching switch block with
Switch between standby switching switch block.
Further, the monitoring system also detects the switch closing and switch opening state of the automatic transfer switch, and will be described
The information of state feeds back to the Control protection system.
Being switched based on composite switch circuit and automatic transfer switch device, the power supply for coupling negative pressure circuit for the present invention is protected
Protecting system, have the characteristics that low-loss, it is easy to control, can be switched fast, and simple for structure, dependable performance.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 shows that automatic charging type forces zero passage high voltage DC breaker structural schematic diagram in the prior art；
Fig. 2 shows the composite switch electrical block diagrams based on coupling negative pressure circuit of the embodiment of the present invention；
Fig. 3 shows the hybrid automatic transfer switch device knot according to the ... of the embodiment of the present invention based on coupling negative pressure circuit
Structure schematic diagram；
Fig. 4 shows dual power supply redundancy power supply system structural schematic diagram according to the ... of the embodiment of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention clearly and completely illustrated, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The switching switch of the present invention uses the composite switch circuit based on coupling negative pressure circuit.The embodiment of the present invention with
It is illustrated for switching switching circuit, but it should be recognized by those skilled in the art that in the base without departing from the present invention
In the case of present inventive concept, switching switch, all switching circuits that can realize connecting and disconnecting of the circuit such as breaker, component, assembly unit,
The present invention can be achieved in equipment, system etc., and it is interior that these are all within the scope of protection of the present invention.
As shown in Fig. 2, the switching circuit includes mechanical switch branch, change of current branch and energy absorption branch.Wherein, institute
It includes mechanical switch to state switching branches；The change of current branch include main solid-state switch branch and with the main solid-state switch branch string
The coupling negative pressure circuit of connection, the main solid-state switch branch include one or more concatenated main solid-state switches, main solid-state switch
One end of branch is connect with a winding of coupling coil Ls, and another winding of the mutual inductor Ls is in discharge capacity electricity
Lu Zhong, to which two windings of mutual inductor Ls make change of current branch and couple the coupling of negative pressure circuit；The coupling negative pressure circuit packet
Include the second of thyristor S, discharge capacity Cs and coupling coil Ls, the thyristor S, discharge capacity Cs and the coupling coil Ls
Winding is formed into a loop.Meanwhile in order to charge to the discharge capacity Cs, DC power supply circuit also is set for the capacitance Cs.Institute
It includes resistance Rs, telegraph key K, DC power supply DC to state DC power supply circuit, wherein one end of the resistance and the one of the capacitance Cs
End connection, the other end of the resistance are connect with the telegraph key K, and the telegraph key K is connect with one end of the DC power supply, described
The other end of DC power supply is connect with the other end of the capacitance Cs.The energy absorption branch includes mainly arrester, is implemented
MOV (metal oxide varistor) Zinc-Oxide Arrester is used in example, absorption system of taking shelter from the thunder is absorbed in the mechanical switch
Moving process in generated dump energy, and then realize to the overvoltage protection of mechanical switch.The present invention is with MOV zinc oxide
Arrester is used as illustratively lightning-arrest absorption system, it is not limited to using MOV Zinc-Oxide Arresters as lightning-arrest absorption system,
It is all to absorb the energy absorption circuit of dump energy or system in branch and be used equally for the present invention.The main solid-state switch branch
Road, the mechanical switch branch are connected with the energy absorption branch circuit parallel connection.Branch in Fig. 2 where main solid-state switch is to break
Indicating can be with a solid-state switch or there are multiple concatenated solid-state switches, it is not intended that the branch where solid-state switch is electricity
What gas disconnected.
The switching circuit is when normal operation is to establish the connection between power supply and load, in the mechanical switch branch
The mechanical switch be closed, the main solid-state switch in the main solid-state switch branch disconnects, and electric current flows through under this state
The mechanical switch.
The separating brake control process of the composite switch circuit based on coupling negative pressure circuit described in embodiment is as follows：Control institute
The main solid-state switch conducting in main solid-state switch branch is stated, and is sent to mechanical switch described in the mechanical switch branch
Separating brake order indicates the mechanical switch separating brake.When the clearance between open contacts of the mechanical switch reach 2-3 millimeters (mm), it is believed that institute
It states mechanical switch and has reached effective open away from the thyristor S controlled at this time in the negative pressure circuit is connected.At this point, the electricity
The winding for holding Cs and the mutual inductor forms oscillation, and forms a negative pressure in the change of current branch by the winding, makes to change
It flows branch entirety conduction voltage drop and is less than the mechanical switch arc voltage, to which impressed current is transferred to institute by the mechanical switch branch
Change of current branch is stated, at this time the mechanical switch branch current zero passage blow-out, completes electric current transfer.It is transported in the mechanical switch separating brake
When corresponding transient recovery voltage can be born by moving its contact gap, the control main solid-state switch disconnects, and circuit produces at this time
Raw energy is absorbed by the MOV Zinc-Oxide Arresters in the energy absorption branch, and main switching switching current drops to zero, separating brake
Process is completed.
The separating brake control process of the composite switch circuit based on coupling negative pressure circuit described in embodiment is as follows：
It is connected main solid-state switch, and mechanical switch is given to send out separating brake order, reach 2 in the clearance between open contacts of the mechanical switch~
When 3 millimeters (mm), the thyristor S conductings in negative pressure circuit are closed in control, and the capacitance Cs in negative pressure circuit and mutual inductor Ls is sent out at this time
Raw oscillation, and a negative pressure is coupled in change of current branch by the mutual inductor Ls, keep the change of current branch entirety conduction voltage drop low
In the arc voltage of the mechanical switch, to which impressed current is transferred to the change of current branch, the machine by the mechanical switch branch
Electric current transfer is completed in tool switching branches current over-zero blow-out.Moving to its contact gap in the mechanical switch separating brake can hold
When by corresponding transient recovery voltage, the control main solid-state switch shutdown, circuit energy is absorbed by MOV at this time, and main switching is opened
Powered-down flow down is down to zero.
Embodiment additionally provides a kind of switch block, and which employs the above-mentioned composite switch electricity based on coupling negative pressure circuit
Road.The switch block is used in three-phase alternating current system, and the circuit of each phase is respectively adopted above-mentioned based on coupling negative pressure circuit
Composite switch circuit.As shown in figure 3, the switch block used in A phase, B phase, C phase respectively it is above-mentioned negative based on coupling
The composite switch circuit of volt circuit：A phase, B phase, C phase in main switching switch block is (for three with standby switching switch in figure
Phase line is distinguished, and A1, B1, C1 indicate A phase, B phase, C phase line) it has been all made of the above-mentioned composite switch based on coupling negative pressure circuit
Circuit；A phase, B phase, C phase in standby switching switch block is (for the triple line differentiation with main switching switch, A2, B2, C2 in figure
To indicate A phase, B phase, C phase line) equally it has been all made of the above-mentioned composite switch circuit based on coupling negative pressure circuit.
As shown in figure 3, embodiment additionally provides a kind of automatic transfer switch device, the automatic transfer switch device includes
Two above-mentioned switch blocks, switching switch block based on one of them, another be standby switching switch block.Course of normal operation
In, the main switching switch block conducting realizes that power supply provides electric current by the main switching switch block to the load；Institute
Standby switching switch block is stated to disconnect.It breaks down and needs power supply being switched to standby switching switch block from main switching switch block
When, process is controlled by above-mentioned separating brake and disconnects the main switching switch block, and by described in the connection of above-mentioned shutting-brake control process
Standby switching switch block.
The present embodiment with dual power supply redundancy power supply system come illustrate it is above-mentioned based on coupling the hybrid of negative pressure circuit cut automatically
The control for changing switching device uses.But it should be clear that above-described embodiment based on coupling negative pressure circuit it is hybrid from
Dynamic converting switch device is not limited in dual power supply redundancy power supply system, more power supply redundancy power supply systems and general such as single
Electric supply system can use electric system of switch etc. can be using electric based on coupling negative pressure described in above-described embodiment
The hybrid automatic transfer switch device on road.
Dual power supply redundancy power supply system structural schematic diagram according to the ... of the embodiment of the present invention as shown in Figure 4.The dual power supply
Power supply system includes power supply, Control protection system, automatic transfer switch device, load and is made of monitoring components such as sensors
Monitoring system, wherein power supply includes two sets of power supplys of working power and stand-by power supply, the master in the automatic transfer switch device
Switching switch block is connect with working power, standby switching switch block is connect with stand-by power supply.Dual power supply redundancy power supply system
The main switching switch block of working power branch road and/or the standby switching switch block of stand-by power supply branch road can make in system
Forced commutation type combined type automatic transfer switch component is vibrated with the LC based on solid-state switch described in above-described embodiment.This implementation
Example is with the switching switch of working power branch road and the switching switch of stand-by power supply branch road using above-mentioned based on coupling negative pressure
It is illustrated for the hybrid automatic transfer switch component of circuit.
Dual power supply redundancy power supply system is under normal power supply state, working power branch in the automatic transfer switch device
Main switching switch block in all switching circuits (switching circuit namely on A, B, C phase line) be in closed form
The electric power of state, working power is supplied to the load by the converting switch device；And in the automatic transfer switch device
All switching circuits (switching circuit namely on A, B, C phase line) in the standby switching switch block of stand-by power supply branch are equal
It is off, the stand-by power supply does not provide electric power to the load.
The monitoring systems stay or the working condition for periodically monitoring entire power supply system, such as the abnormal feelings in system
Condition：Sensor monitoring in the working condition of Sensor monitoring working power in working power branch, stand-by power supply branch is standby
With the working condition of the Sensor monitoring load in the working condition of power supply, load branch circuit.
When the monitoring system detectio is to working power failure or excessive pressure drop, corresponding event is sent to Control protection system
Hinder signal.Control protection system judges work after receiving the expression working power out of order signal that monitoring system is sent
Make power supply failure, needs power supply being switched on stand-by power supply from working power.At this point, the control in Control protection system
Unit sends separating brake order to the switching switch block of working power and sends life of closing a floodgate to the switching switch block of stand-by power supply
Enable, the switching switch block to control working power disconnects, and the switching switch block for controlling stand-by power supply be closed with
The electrical connection between stand-by power supply and load is established, to provide electric power by stand-by power supply case load.
When normal operation, all mechanical switch in main switching switch block in A phases, B phases and C phase lines are in closed form
State, the electric current in each phase line flow through respective mechanical switch and provide electric power to load.It is sent out in Sensor monitoring to working power
When raw failure, warning message is sent to Control protection system.After receiving the warning message, the control in Control protection system
The mechanical switch of main switching switch block of the unit into the automatic transfer switch device sends out separating brake order, in the machinery
When switch contact is opened away from 2~3mm is reached, thyristor S conductings in negative pressure circuit are closed in control, and capacitance Cs is vibrated with mutual inductor Ls, is led to
It crosses the mutual inductor Ls and couples a negative pressure in change of current branch, change of current branch entirety conduction voltage drop is made to be less than mechanical switch arc voltage,
To which impressed current is transferred to change of current branch by mechanical switch branch, mechanical switch branch current zero passage blow-out is completed electric current and is turned
It moves.When the mechanical switch separating brake moves to contact gap and can bear corresponding transient recovery voltage, main solid-state switch closes
Disconnected, circuit energy is absorbed by MOV at this time, and main switching switching current drops to zero；Combined floodgate order is sent out to standby switching switch simultaneously,
So that standby working power powers to the load.
Electric power is provided in the dual power supply redundancy power supply system to load from stand-by power supply to be switched to from working power to institute
The process of load offer electric power is provided and is switched to from stand-by power supply to the load from working power to load offer electric power and is provided
The process of electric power is similar, and details are not described herein.
Sensor in load branch circuit can send the fault message monitored after monitoring that the load breaks down
To Control protection system.The Control protection system can close working power branch and stand-by power supply according to the fault message
Switching switch block in branch is powered with disconnecting any power supply to the load.
The monitoring system detects switching and cut-offs state simultaneously, and status information feedback is returned the Control protection system,
To ensure to cut-off and be connected.
Control protection system to the control of other interconnection switches or receives other contacts and opens also according to the information realization of reception
The status information of pass, and all information of reception are sent to remote computer, while letter can be received from remote computer
Breath, such as the related switching switch of control carry out the information of closure or openness.
Illustrated by taking three-phase alternating current as an example in embodiment, but it should be recognized by those skilled in the art that
In the case of basic inventive concept of the invention, switching circuit of the invention, switching device, system and its control method
It is not limited in the three-phase alternating current based on exemplary illustration purpose in specification, switching circuit of the invention, is at switching device
System and its control method are suitable for including but not limited to the system of direct current and alternating current.
It should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.Front and back two
Do not necessarily imply that it must is a kind of sequence that priority executes between a step, as long as the technical problem of the present invention can be solved
, and do not necessarily implied that between former and later two steps and centainly eliminate other steps unlisted in invention, and
Before main device, auxiliary device not necessarily indicate that main and auxiliary, the first device and the second device not necessarily indicate in specification
Sequence afterwards, is used only for distinguishing；Similarly, not necessarily meaning is a kind of direct electricity between each component, assembly unit of system
Gas connects, and what specification indicated is only logical relation.Although the present invention is described in detail referring to the foregoing embodiments,
It will be understood by those of ordinary skill in the art that：It can still repair the technical solution recorded in foregoing embodiments
Change or equivalent replacement of some of the technical features；And these modifications or replacements, do not make corresponding technical solution
Essence is detached from the spirit and scope of various embodiments of the present invention technical solution.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of composite switch circuit based on coupling negative pressure circuit, which is characterized in that
The composite switch circuit includes mechanical switch branch, change of current branch and energy absorption branch；Wherein,
The change of current branch include main solid-state switch branch and with the main solid-state switch branch is concatenated couples negative pressure circuit.
2. composite switch circuit according to claim 1, which is characterized in that
The mechanical switch branch, energy absorption branch are connected with the change of current branch circuit parallel connection.
3. composite switch circuit according to claim 1, which is characterized in that
The coupling negative pressure circuit includes coupling coil, thyristor and discharge capacity.
4. composite switch circuit according to claim 3, which is characterized in that
The first winding of coupling coil of the coupling negative pressure circuit is located at the main solid-state switch branch；The of the coupling coil
Two windings are located at the coupling negative pressure circuit, and the thyristor, discharge capacity are formed into a loop with second winding.
5. composite switch circuit according to claim 4, which is characterized in that
The capacitance is powered by DC power supply circuit.
6. composite switch circuit according to claim 1, which is characterized in that
The mechanical switch branch includes mechanical switch；And/or
The main solid-state switching circuits include a solid-state switch or multiple concatenated solid-state switches；And/or the energy absorption
Branch includes arrester.
7. a kind of automatic transfer switch device, which is characterized in that the automatic transfer switch device includes main switching switch block
With standby switching switch block, wherein
It is described it is main switching switch block include three as described in claim 1-6 is any based on couple negative pressure circuit it is hybrid
Switching circuit is respectively used in the A phase, B phase, C phase branch of three-phase electricity；
The standby switching switch block include three as described in claim 1-6 is any based on coupling the hybrid of negative pressure circuit
Switching circuit is respectively used in the A phase, B phase, C phase branch of three-phase electricity.
8. a kind of power supply switch protecting system, which is characterized in that
The power protection switching system includes：
Working power and stand-by power supply；
Automatic transfer switch device as claimed in claim 7, the main switching switch block in the automatic transfer switch device
It is connect with working power, standby switching switch block is connect with stand-by power supply；
Monitoring system, the working condition for monitoring power supply and/or stand-by power supply；
Control protection system, for controlling main switching switch block and/or standby switching switch in the automatic transfer switch device
Component separating brake, and/or for controlling main switching switch block and/or standby switching switch block in the automatic transfer switch device
It closes a floodgate.
9. power supply switch protecting system according to claim 8, which is characterized in that
The monitoring system is additionally operable to the information of the working condition being sent to the Control protection system, the control protection
System controls the automatic transfer switch device in the main switching switch block and standby switching switch block according to described information
Between switch.
10. power supply switch protecting system according to claim 8 or claim 9, which is characterized in that
The monitoring system also detects the switch closing and switch opening state of the automatic transfer switch, and the information of the state is fed back
To the Control protection system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810008983.1A CN108322202A (en) | 2018-01-04 | 2018-01-04 | It is a kind of based on coupling negative pressure circuit composite switch and device, protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810008983.1A CN108322202A (en) | 2018-01-04 | 2018-01-04 | It is a kind of based on coupling negative pressure circuit composite switch and device, protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108322202A true CN108322202A (en) | 2018-07-24 |
Family
ID=62893015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810008983.1A Pending CN108322202A (en) | 2018-01-04 | 2018-01-04 | It is a kind of based on coupling negative pressure circuit composite switch and device, protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108322202A (en) |
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2018
- 2018-01-04 CN CN201810008983.1A patent/CN108322202A/en active Pending
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Application publication date: 20180724 |