CN103683175B - Outdoor intelligent protection device during unbalanced three-phase lines and the method for input thereof - Google Patents
Outdoor intelligent protection device during unbalanced three-phase lines and the method for input thereof Download PDFInfo
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Abstract
The present invention discloses and a kind of may be installed on chopper and its strong interference immunity, reliability is high, accurate timing is when unbalanced three-phase lines outdoor intelligent protection device and input method thereof.It includes casing, input circuit, output circuit and governor circuit, and governor circuit is made up of microprocessor and on-off circuit, and input circuit is access to the input of microprocessor in photoelectric coupling mode, and the outfan of microprocessor is connected with output circuit by on-off circuit.The present invention replaces the protection device accessed by relay coil form; its anti-interference not only strengthening this device and reliability; and delay time; by microprocessor control; use high accuracy device and algorithm; it is effectively guaranteed accuracy of action, makes delay precision stability contorting within 10ms.Delay time can be by including that the man-machine dialog interface of display module presets, and flexible operation arranges precision and is up to 1ms.It meets IEC61850 data interface protocol standard.
Description
Technical field
When the present invention relates to a kind of unbalanced three-phase lines, it is connected to outdoor breaker and non-whole phase protection tripping operation outlet
Protection device between relay, particularly to outdoor intelligent protection device during a kind of unbalanced three-phase lines and
Input method.
Background technology
Operationally, due to a variety of causes, chopper three-phase may disconnect a phase or biphase, make in power system
Become open-phase operation.When system is in non-full-operating state, the negative phase-sequence of appearance, zero sequence decile in system
Measure and electrical equipment is produced certain harm.Even being also possible to make some protection act trip, normal fortune is opened in wrong diagnosis
The circuit of row.It is thus desirable to the existence of three phases un identical protection device, avoid in this device of electric power non-entirely
Run mutually.It addition, if system uses substance, (when there is singlephase earth fault the most on the line, protection is dynamic
Make chopper the single-pole reclosing of a tripping fault phase) or combine weight (i.e. at circuit generation singlephase earth fault
Time, using single-pole reclosing mode, using three_phase reclosing when there is phase fault) mode, waiting
During coincidence, although system is in non-full-operating state.But the time delay that must have certain time ensures
The realization of reclosing, thus avoid some transient faults and cause power failure.
The chopper outdoor three-phase non-uniform protection that presently, there are uses the time relay and auxiliary reclay group
Becoming, generally have time precision the highest, especially under the influence of standing outdoor environment for a long time, time error strengthens
Being failure to actuate of this action of equipment can be caused, should not the action of action, puzzlement that cause the user is the biggest and loss；
It addition, original device does not has action record storage function and communication function, it is unfavorable for that remote dispatching is to relevant
The collecting, analyze and manage further of data.
Summary of the invention
The technical problem to be solved in the present invention be to provide one may be installed on chopper and its strong interference immunity,
Reliability is high, the accurate timing outdoor intelligent protection device when unbalanced three-phase lines.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
Outdoor intelligent protection device during the unbalanced three-phase lines of the present invention, including casing, can be with three-phase breaker
The input circuit that connects, the output circuit can being connected with non-whole phase protection tripping operation exit relay and between input
Controlling the governor circuit of output between circuit and output circuit, described governor circuit is by microprocessor and switch electricity
Road is constituted, and described input circuit is access to the input of microprocessor in photoelectric coupling mode, microprocessor defeated
Going out end to connect with the input of described on-off circuit, the outfan of described on-off circuit connects with output circuit,
Casing is additionally provided with the display module being connected with microprocessor and IEC81650 host-host protocol can be met
Network interface, described on-off circuit include at least three groups be connected to output end of microprocessor switching tube branch road and
Optocoupler relay drive, in switching tube branch road, the grid of power tube is connected to the defeated of microprocessor by resistance R31
Going out end, the source ground of power tube, its drain electrode is connected in optocoupler relay drive input by resistance R33
The negative pole of photodiode, the positive pole of this photodiode connects running voltage, in grid and the source of power tube
Biasing resistor R32 it is additionally provided with between pole.
Described input circuit includes the isolation that photoelectrical coupler is connected with photoelectrical coupler input with least one set
Bleeder circuit, isolation bleeder circuit includes current-limiting resistor voltage divider, diode and the magnetic bead being connected in series, photoelectricity
The outfan of bonder connects with the input of microprocessor.
Described current-limiting resistor voltage divider is made up of with resistance R11 resistance R12, resistance R13, wherein, resistance R12,
Resistance R13 is serially connected in the photodiode two ends in photoelectrical coupler input respectively, then, then with resistance
R11 is in parallel, described photoelectrical coupler be model be HCPL2731 or SFH619A or TLP627 or
The optocoupler of PS2502L.
Described output circuit is made up of auxiliary reclay, the control end of auxiliary reclay and optocoupler relay drive
Output connect, its outfan and described non-whole phase protection tripping operation exit relay connects.
The built-in industrial level arm processor that described microprocessor uses model to be Micro2440, described net
The interface that the ethernet control module that network interface uses with model is DM9000 is adaptive.
The input method of the outdoor intelligent protection device during unbalanced three-phase lines of the present invention, including of the present invention
Unbalanced three-phase lines time outdoor intelligent protection device, its put into determination methods as follows:
When microprocessor input is in high level Idle state:
If microprocessor input receives low level signal, then microprocessor input is made to transfer lower jumping to along shape
State；Otherwise, microprocessor input is made to be maintained as high level Idle state and make input low level timer clear
Zero, meanwhile, microprocessor does not export the signal of the actuating of relay made in output circuit.
When microprocessor input be lower jumping along state time:
1) if the low level that microprocessor input receives is persistent signal, then make microprocessor to input
Low duration and output time delay start timing, otherwise make microprocessor input transfer jumping to along state；
2) when microprocessor, persistent period and output time delay are started timing, if the input low level persistent period is big
In 33ms, then making microprocessor input transfer Low level effective to, otherwise, microprocessor input still keeps
For lower jumping along state.
When microprocessor input is in Low level effective:
1) if what the input of microprocessor still received is lasting low level signal, then microprocessor is made
Input low level persistent period and output time delay are continued timing, otherwise makes microprocessor input transfer jumping to
Along state；
2) input low level persistent period and output time delay are continued timing, if input low level is held by microprocessor
The output delay time that continuous time and output time delay are arranged more than or equal to each road, then microprocessor output order is described
The signal of the actuating of relay also records output time and the output time of this output signal, otherwise, returns back to micro-
Processor input low level timer starts the state of timing to persistent period and output time delay, and microprocessor is not
Output makes the signal of the described actuating of relay；
3) judge whether the relay output duration in the output circuit of each road is equal to " input pulse time+20ms ",
Being then to close the output of corresponding relay and preserve this output time, output duration, output time delay simultaneously is clear
Zero, wait action next time, otherwise, continue this relay output time timing.
When microprocessor input transfer to upper jumping along time:
1) if microprocessor input receives low level signal, then input state is changed into lower jumping edge, otherwise,
Start the timing of input high level persistent period；
2) after starting the timing of input high level persistent period, whether it is more than depending on the input high level persistent period
33ms, is then to change input state into high level Idle state, and otherwise, input high level is invalid, remains defeated
Entering state is upper jumping edge.
Compared with prior art, the present invention uses the protection device being made up of microprocessor and photoelectrical coupler,
Accessed between closing position and trip position, be instead of the former equipment form by relay coil
Access, enhance anti-interference and the reliability of this device.Delay time, by microprocessor control, adopts
With high accuracy device and algorithm, being effectively guaranteed accuracy of action, delay precision is stable within 10ms.
Delay time can be by including that the man-machine dialog interface of display module presets, and flexible operation arranges essence
Degree up to 1ms；Action record is all stored in microprocessor or unloading in external storage with data mode every time
In card, it is simple to the fault occurred is inquired about, collects and analyzed, improve relevant device further
Tracing management.Arranging network service and be conducive to remote dispatching and analysis, this network service meets IEC61850 number
According to interface protocol standard.During installation use DIN35 guide rails assembling, can easily, be flexibly installed to family
In inside and outside various regulator cubicle/casings.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the present invention.
Fig. 2 is the input circuit fundamental diagram of the present invention.
Fig. 3 be the present invention on-off circuit and output circuit fundamental diagram.
Fig. 4 is one of microprocessor judges flow chart of the present invention.
Fig. 5 is the two of microprocessor judges flow chart of the present invention.
Fig. 6 is the three of microprocessor judges flow chart of the present invention.
Fig. 7 is the four of microprocessor judges flow chart of the present invention.
Reference:
Input circuit 1, isolation bleeder circuit 11, governor circuit 2, microprocessor 21, on-off circuit 22,
Switching tube branch road 23, output circuit 3, LCD display module 4, USB interface 5, network interface 6, light thermocouple
Clutch U1, optocoupler relay drive U2, power tube V1, auxiliary reclay RL1, diode D1, magnetic bead
L1, the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R13, the 31st resistance R31,
Biasing resistor R32, the 33rd resistance R33.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the accompanying drawings.
The present invention is to access between outdoor three-phase breaker closing position and non-whole phase protection tripping operation exit relay
The protection device being made up of microprocessor 21 and photoelectrical coupler U1, this protection device is arranged at by plastic cement
Or in the casing made of metal material, casing is provided with and can meet IEC81650 host-host protocol and can be with type
Number for the adaptive network interface of DM9000 ethernet control module 6, (DM9000 is a fully-integrated fast
Speed ethernet mac controller and general Processing Interface), USB interface 5 and there is man-machine dialog interface
LCD display module 4, it is thin that the display screen in display module 4 uses tangible LCD display, keyboard to use
Film button.
As it is shown in figure 1, the outdoor intelligent protection device during unbalanced three-phase lines of the present invention, including can be with three-phase
Input circuit 1 that chopper connects, the output circuit 3 can being connected with non-whole phase protection tripping operation exit relay and
Controlling the governor circuit 2 of output between input circuit 1 and output circuit 3, governor circuit 2 is by micro-process
Device 21 and on-off circuit 22 are constituted, and input circuit 1 is access to the input of microprocessor 21 in photoelectric coupling mode
End, the outfan of microprocessor 21 connects with the input of described on-off circuit 22, on-off circuit 22 defeated
Going out end to connect with output circuit 3, display module 4, network interface 6 and USB interface 5 in casing are respectively
It is connected with microprocessor 21.
At built-in industrial level ARM that described microprocessor 21 uses model to be the production of Micro2440 Samsung
Reason device, this microprocessor 21 is the bright spot of the present invention, due to the existence of microprocessor 21, can tie flexibly
Close input signal, it is achieved the capacity of resisting disturbance of this device, stabilization ability and delay-capacity, make prolonging of this device
Time precision setting resolution reach 1ms so that delay precision is possibly realized less than 10ms, delay precision is high
Protection device more can send protection act accurately, replace the shortcoming that original device time delay is inaccurate, the most more
It is beneficial to staff and formulates delay time of suitably adjusting.
As in figure 2 it is shown, described input circuit 1 includes photoelectrical coupler U1 and least one set and photoelectrical coupler
The isolation bleeder circuit 11 that U1 input is connected, isolation bleeder circuit 11 is preferably the electricity that two groups of structures are identical
Road, one group of work, another group is standby, current-limiting resistor voltage divider that isolation bleeder circuit 11 includes being connected in series,
Diode D1 and magnetic bead L1, current-limiting resistor voltage divider makes the input service electric current of photoelectrical coupler U1 be limited to 2mA
Left and right, so that photoelectrical coupler U1 can work reliably；Diode D1 and magnetic bead L1 rises anti-interference
Effect, the anti-Hz noise of diode D1, the anti-High-frequency Interference of magnetic bead L1, the outfan of photoelectrical coupler U1
Connect with the input of microprocessor 21, when the phototriode in photoelectrical coupler U1 outfan ends,
This outfan is connected with running voltage end by the first resistance and exports high level.
Described current-limiting resistor voltage divider is by being serially connected in the of photoelectrical coupler U1 input photodiode D1 two ends
12 resistance R12, the 13rd resistance R13 and the 11st resistance R11 parallel connection are constituted, wherein the 11st resistance
R11 has shunting action, and the 12nd resistance R12 and the 13rd resistance R13 is equivalent, the preferably the 12nd resistance
R12, the 13rd resistance R13 are respectively 30K ohm, and the 11st resistance R11 is 100K ohm, isolate two
Pole pipe D1 model is IN4007.
The described input circuit 1 form by photoelectric coupling, replaces the form of traditional relay coil coupling,
Use the form of photoelectric coupling operating circuit, both can increase the response speed of signal, it is also possible to reduce power consumption.
The transmission response speed of photoelectric coupling is in ns level, and the corresponding response speed of electromagnetic coupled is in ms level；Additionally
The input power of coil relay is relatively big, generally at 1W to 5W, the steady operation of guarantee relay and
The anti-interference requirement of circuit, and photoelectric coupling circuit both can improve the reliability of anti-interference, circuit, again may be used
To reduce input power consumption, generally at below 0.5W.
Described photoelectrical coupler U1 uses model to be HCPL2731, SFH619A, TLP627 or PS2502L
Deng optocoupler.
When there is unbalanced three-phase lines, the input signal of the input of input circuit 1 is direct current 220V or direct current
110V, the photodiode now, after current-limiting resistor voltage divider dividing potential drop, in photoelectrical coupler U1 input
D1 turns on, and causes the outfan conducting of photoelectrical coupler U1 and this terminal voltage is pulled low to low level (ground connection),
I.e. to microprocessor 21 output low level.
As it is shown on figure 3, described on-off circuit 22 includes that at least three groups are connected to microprocessor 21 outfan
Switching tube branch road 23 and optocoupler relay drive U2, preferably seven groups switching branches and optocoupler relay drive
U2。
In switching tube branch road 23, the grid of power tube V1 is connected to microprocessor 21 by the 31st resistance R31
Outfan, the source ground of power tube V1, its drain electrode is connected to optocoupler relay by the 33rd resistance R33
The negative pole of the photodiode in driver U2 input, the positive pole of this photodiode connects running voltage,
It is additionally provided with biasing resistor R32 between grid and the source electrode of power tube V1.
Power tube V1 uses model to be the NMOS tube of 2N7002.
Described output circuit 3 is made up of auxiliary reclay RL1, the control end of auxiliary reclay RL1 and optocoupler
The output of relay drive U2 connects, its outfan and described non-whole phase protection tripping operation exit relay phase
Connect.
Output uses auxiliary reclay RL1, and the output signal that microprocessor 21 sends is driven by optocoupler relay
Device U2 realize to middle relay R L1 driving.This light thermocouple relay drive uses KAQW210,
Auxiliary reclay RL1 uses the relay that ST2 serial model No. is ST2-DC24V of Panasonic.
When microprocessor 21 exports high level, power tube V1 turns on, optocoupler relay drive U2 then
Input turns on, its outfan output low level (ground connection), auxiliary reclay RL1 coil adhesive, and contact is moved
Make, thus the loop that tripping is external.
Using the outdoor intelligent protection device during unbalanced three-phase lines of the present invention, it is as follows that it puts into determination methods:
Microprocessor 21 input state has four states；High level Idle state, trailing edge state, low level
Effectively, rising edge state.
High level Idle state: be continuously in high level state, the time is more than 33ms；
Trailing edge state: when being transferred to low level by high level, needs the time delay process just meeting through a 33ms
It indeed is in low level；
Rising edge state: when being transferred to high level by low level, it is also desirable to through the time delay process ability of a 33ms
Can be at high level；
Low level effective: be continuously in low level state, the time is more than 33ms.
1., when unbalanced three-phase lines does not occurs in circuit, input circuit 1 exports (i.e. the input of microprocessor 21)
For (as shown in Figure 4) during high level Idle state: if the situation of unbalanced three-phase lines now occurs, microprocessor
The input of 21 receives low level signal, then make microprocessor 21 input transfer lower jumping to along state, otherwise,
Make microprocessor 21 input still for high level Idle state, input low level timer clearing (input low level
Persistent period be intended to judge whether, in trailing edge state and the condition meeting deferred action, reset at this
Place is intended to initialize zero setting, it is ensured that transfer trailing edge state to from high level Idle state is to start meter from null value every time
Time), meanwhile, make microprocessor 21 not export the auxiliary reclay RL1 action controlled in output circuit 3
Signal.
2. when microprocessor 21 input be lower jumping along state time (as shown in Figure 5),
1) if what the input of microprocessor 21 received is lasting low level signal, then microprocessor is made
To this persistent period, (output delay timer is time delay below to 21 input low level timers with output time delay
Output timing judges to use) start timing, otherwise make microprocessor 21 input transfer jumping edge to；
2) when microprocessor 21 input low level timer, described persistent period and output time delay are started timing,
If the input low level persistent period is more than 33ms, then microprocessor 21 input is made to transfer Low level effective to, no
Then, microprocessor 21 input is still lower jumping edge.
3. (get rid of external interference, i.e. circuit when input circuit 1 is output as Low level effective and be likely to occur wink
During the unbalanced three-phase lines that time property fault, permanent fault or other circuit breaker failures etc. cause, such as Fig. 6 institute
Show):
1) what the input of microprocessor 21 still received is lasting low level signal, then make microprocessor
This persistent period and output time delay are continued timing by 21 input low level timers, otherwise make microprocessor 21 defeated
Enter end transfer to jumping along (this step get rid of transient fault, but system be likely to occur permanent fault or
The unbalanced three-phase lines that other circuit breaker failures of person etc. cause, and device sends trip command, protects system,
Fix a breakdown).
2) when microprocessor 21 input low level timer, described persistent period and output time delay are continued timing,
If input low level persistent period and output time delay are more than or equal to each road output delay time (under normal circumstances,
The delay time on this seven tunnel should be identical), then make microprocessor 21 output control described auxiliary reclay RL1 and move
The signal made the output time and the output time that record this output signal；Otherwise, microprocessor 21 is returned back to
Input low level timer starts time status to this persistent period and output time delay, and microprocessor 21 does not exports
The signal of the auxiliary reclay RL1 action that order is corresponding.
3) judge that whether each road auxiliary reclay RL1 output duration is equal to " input pulse time+20ms " (institute
State input pulse and refer to the input pulse width of the photoelectrical coupler U1 in input circuit 1, be and three-phase occurs
The persistent period of inconsistent state), it is then to close the output of the auxiliary reclay RL1 of correspondence and preserve output
Moment, output duration, output time delay simultaneously resets, and waits action next time, otherwise, continues in the middle of this
The output time timing of relay R L1.
4. when microprocessor 21 input transfer to upper jumping along time (as shown in Figure 7):
1) when microprocessor 21 input receives low level signal, then input state is changed into lower jumping edge,
Otherwise, start the timing of input high level persistent period；
2) after starting the timing of input high level persistent period, whether it is more than depending on the input high level persistent period
33ms, is then to change input state into high level Idle state, and otherwise, input high level is invalid, remains defeated
Entering state is upper jumping edge.
The present invention can be by button or touch described LCD and arrange delay time.
It can also carry out data copy by USB interface 5, it is also possible to transmits related data by network.
Claims (9)
1. outdoor intelligent protection device during unbalanced three-phase lines, including casing, can be with three-phase breaker phase
The input circuit (1) connect, the output circuit (3) can being connected with non-whole phase protection tripping operation exit relay and Jie
The governor circuit (2) of output is controlled between input circuit (1) and output circuit (3), it is characterised in that:
Described governor circuit (2) is made up of microprocessor (21) and on-off circuit (22), described input circuit (1)
The input of microprocessor (21), the outfan of microprocessor (21) and institute it is access in photoelectric coupling mode
The input stating on-off circuit (22) connects, the outfan of described on-off circuit (22) and output circuit (3)
Connect, casing is additionally provided with the display module (4) being connected with microprocessor (21) and can meet
The network interface (6) of IEC81650 host-host protocol, described on-off circuit (22) includes that at least three groups are connected to
The switching tube branch road (23) of microprocessor (21) outfan and optocoupler relay drive (U2), switching tube props up
In road (23), the grid of power tube (V1) is connected to the outfan of microprocessor (21) by resistance R31,
The source ground of power tube (V1), it is defeated that its drain electrode is connected to optocoupler relay drive (U2) by resistance R33
Entering the negative pole of photodiode in end, the positive pole of this photodiode connects running voltage, at power tube (V1)
Grid and source electrode between be additionally provided with biasing resistor R32.
Outdoor intelligent protection device during unbalanced three-phase lines the most according to claim 1, it is characterised in that:
Described input circuit (1) includes that photoelectrical coupler (U1) and least one set are defeated with photoelectrical coupler (U1)
Entering the isolation bleeder circuit (11) that end is connected, isolation bleeder circuit (11) includes the dividing potential drop current limliting being connected in series
Resistance, diode (D1) and magnetic bead (L1), the outfan of photoelectrical coupler (U1) and microprocessor (21)
Input connect.
Outdoor intelligent protection device during unbalanced three-phase lines the most according to claim 2, it is characterised in that:
Described current-limiting resistor voltage divider is made up of with resistance R11 resistance R12, resistance R13, wherein, resistance R12,
Resistance R13 is serially connected in the photodiode two ends in photoelectrical coupler (U1) input respectively, then, then
In parallel with resistance R11, described photoelectrical coupler (U1) be model be HCPL2731 or SFH619A or
The optocoupler of TLP627 or PS2502L.
Outdoor intelligent protection device during unbalanced three-phase lines the most according to claim 1, it is characterised in that:
Described output circuit (3) is made up of auxiliary reclay (RL1), the control end of auxiliary reclay (RL1)
Output with optocoupler relay drive (U2) connects, its outfan and the tripping operation outlet of described non-whole phase protection
Relay connects.
Outdoor intelligent protection device during unbalanced three-phase lines the most according to claim 1, it is characterised in that:
The built-in industrial level arm processor that described microprocessor (21) uses model to be Micro2440, described
The interface that the ethernet control module that network interface (6) uses with model is DM9000 is adaptive.
6. an input method for outdoor intelligent protection device during unbalanced three-phase lines, wants including using right such as
Seeking the outdoor intelligent protection device during unbalanced three-phase lines according to any one of 1-5, it puts into determination methods such as
Under:
When microprocessor (21) input end is in high level Idle state:
If microprocessor (21) input receives low level signal, then make microprocessor (21) input
Transfer lower jumping to along state；Otherwise, microprocessor (21) input is made to be maintained as high level Idle state and make
Input low level timer resets, and meanwhile, microprocessor (21) does not export and makes continuing in output circuit (3)
The signal of electrical equipment action.
The input method of outdoor intelligent protection device during unbalanced three-phase lines the most according to claim 6,
It is characterized in that: when microprocessor (21) input be lower jumping along state time:
1) if the low level that microprocessor (21) input receives is persistent signal, then microprocessor is made
(21) input low level persistent period and output time delay are started timing, otherwise make microprocessor (21) defeated
Enter end and transfer jumping to along state；
2) persistent period and output time delay are started timing, if input low level continues when microprocessor (21)
Time is more than 33ms, then make microprocessor (21) input transfer Low level effective to, otherwise, and microprocessor
(21) input is maintained as lower jumping along state.
The input method of outdoor intelligent protection device during unbalanced three-phase lines the most according to claim 7,
It is characterized in that: when microprocessor (21) input end is in Low level effective:
1) microprocessor (21) if input still receives is lasting low level signal, then make micro-
Input low level persistent period and output time delay are continued timing by processor (21), otherwise make microprocessor (21)
Input transfers jumping to along state；
2) input low level persistent period and output time delay are continued timing, if inputting low by microprocessor (21)
The output delay time that level duration and output time delay are arranged more than or equal to each road, then microprocessor (21)
Output makes the signal of the described actuating of relay and records output time and the output time of this output signal, otherwise,
Return back to microprocessor (21) input low level timer and persistent period and output time delay are started the shape of timing
State, microprocessor (21) does not export the signal making the described actuating of relay；
3) judge that whether the relay output duration in each road output circuit (3) is equal to " the input pulse time
+ 20ms ", it is then to close the output of corresponding relay and preserve this output time, output duration, the most defeated
Go out time delay to reset, wait action next time, otherwise, continue this relay output time timing.
The input method of outdoor intelligent protection device during unbalanced three-phase lines the most according to claim 7,
It is characterized in that: when microprocessor (21) input transfer to upper jumping along time:
1) if microprocessor (21) input receives low level signal, then input state is changed into lower jumping edge,
Otherwise, start the timing of input high level persistent period；
2) after starting the timing of input high level persistent period, whether it is more than depending on the input high level persistent period
33ms, is then to change input state into high level Idle state, and otherwise, input high level is invalid, remains defeated
Entering state is upper jumping edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310694977.3A CN103683175B (en) | 2013-12-17 | 2013-12-17 | Outdoor intelligent protection device during unbalanced three-phase lines and the method for input thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310694977.3A CN103683175B (en) | 2013-12-17 | 2013-12-17 | Outdoor intelligent protection device during unbalanced three-phase lines and the method for input thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103683175A CN103683175A (en) | 2014-03-26 |
| CN103683175B true CN103683175B (en) | 2016-08-17 |
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| CN201310694977.3A Expired - Fee Related CN103683175B (en) | 2013-12-17 | 2013-12-17 | Outdoor intelligent protection device during unbalanced three-phase lines and the method for input thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928916A (en) * | 2014-04-11 | 2014-07-16 | 国家电网公司 | Three-phase inconsistency protection circuit of circuit breaker |
| CN104167718B (en) * | 2014-07-09 | 2018-05-08 | 山东泰开高压开关有限公司 | Non-whole phase protection device for breaker |
| CN110687386B (en) * | 2019-11-05 | 2022-04-19 | 国网山西省电力公司阳泉供电公司 | Three-phase inconsistent protection test box for circuit breaker body |
| CN116915833A (en) * | 2023-05-31 | 2023-10-20 | 裕太微(上海)电子有限公司 | A method and system for preventing gigabit optical interface mislinks |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2800611Y (en) * | 2005-05-23 | 2006-07-26 | 王文杰 | Phase-failure protection device for three-phase power supply |
| CN201219197Y (en) * | 2008-06-20 | 2009-04-08 | 苏州新协力工业控制工程技术研究中心有限公司 | AC phase sequence affirmation and phase loss protector |
| CN201886980U (en) * | 2010-12-09 | 2011-06-29 | 陕西金源自动化科技有限公司 | Novel three-phase inconsistent protection design for circuit breaker body |
| CN202651770U (en) * | 2012-07-20 | 2013-01-02 | 李彬林 | Motor phase loss protection circuit |
| CN203707730U (en) * | 2013-12-17 | 2014-07-09 | 深圳市中江源科技有限公司 | Outdoor intelligent three-phase inconsistent protective device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2800611Y (en) * | 2005-05-23 | 2006-07-26 | 王文杰 | Phase-failure protection device for three-phase power supply |
| CN201219197Y (en) * | 2008-06-20 | 2009-04-08 | 苏州新协力工业控制工程技术研究中心有限公司 | AC phase sequence affirmation and phase loss protector |
| CN201886980U (en) * | 2010-12-09 | 2011-06-29 | 陕西金源自动化科技有限公司 | Novel three-phase inconsistent protection design for circuit breaker body |
| CN202651770U (en) * | 2012-07-20 | 2013-01-02 | 李彬林 | Motor phase loss protection circuit |
| CN203707730U (en) * | 2013-12-17 | 2014-07-09 | 深圳市中江源科技有限公司 | Outdoor intelligent three-phase inconsistent protective device |
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