CN205863891U - A kind of laboratory power of alterating and direct current short-circuit protection - Google Patents
A kind of laboratory power of alterating and direct current short-circuit protection Download PDFInfo
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- CN205863891U CN205863891U CN201620880502.2U CN201620880502U CN205863891U CN 205863891 U CN205863891 U CN 205863891U CN 201620880502 U CN201620880502 U CN 201620880502U CN 205863891 U CN205863891 U CN 205863891U
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- auxiliary reclay
- short
- power supply
- load
- circuit protection
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Abstract
The utility model discloses a kind of laboratory power of alterating and direct current short-circuit protection, it is characterized in that: described protection device is arranged between power supply (1) and load (18), protection device is mainly by fuse (2), auxiliary reclay, light emitting diode, resistance and button connection in series-parallel form, this utility model needs frequently to change fuse when efficiently solving load short circuits during traditional experiment real training, make teaching efficiency low, and the phenomenon that fusible core of fuse is supervened during burning, student is the most easily made to produce debug-item phobia, it is unfavorable for the study of Students ' Major course and puts into practice the raising of technical ability, and hinder the cultivation of student's Creative Thinking.
Description
Technical field
This utility model relates to power technique fields, is specifically related to a kind of laboratory power of alterating and direct current short-circuit protection.
Background technology
The most a lot of institution of higher learning, particularly Higher Vocational College have all put into large number quipments, are used for improving student's practice
Operant skill, in numerous specialized courses experimental real-training projects of the specialty such as electric automatization, electromechanical integration, used performs unit
Part (or being referred to as load) the electric pressure overwhelming majority is alternating current 220V or direct current 24V, and general fuse is protected as power supply short circuit
Protection element.Although this protected mode is simply effective, but when load is short-circuited phenomenon, by burning the fusible core of fuse
Protect power supply.Restore electricity and must change fuse, not only waste but also cumbersome.Meanwhile, also can accompany when producing short circuit
With following phenomenon: explode, smolder and the smell of burning.This easily causes partial students, the student that particularly psychological diathesis is poor at circuit or
Produce certain feared state of mind during program debugging, them so can be allowed to show the most actively in experimental real-training project, positive,
More dare not put into practice, dare not innovate.
Although the most existing a lot of universities and colleges use various apparatus for protecting power supply, play in teaching process and the most actively make
With, but still suffer from many weak points:
1, protection domain is narrow: a lot of existing power supply protection devices or can only protect alternating current power supply, or can only protect straight
Stream power supply, and protect supply voltage the most single grade.
2, teaching efficiency is low: because protection device indicates without obvious normal power supply and load short circuits, is supported on and is short-circuited
Time, user is not easy to discover the generation of short circuit phenomenon, mostly is suspection connection or programming mistake.Because of circuit or program
Detect and waste more time, so that experimental real-training course teaching is inefficient.
3, inconvenience is safeguarded: when power supply short circuit device breaks down, control circuit is more complicated, and teacher or student cannot
Repair, need professional and technical personnel to safeguard, make troubles to user, and input cost is higher.
4, functional promotion space is little: most existing power supply short-circuit protections, because circuit is cured, function then cannot
Continue to expand.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of laboratory power of alterating and direct current short-circuit protection, this reality
With novel efficiently solve load short circuits during traditional experiment real training time need frequently to change fuse so that teaching efficiency is low
Under, and the phenomenon that fusible core of fuse is supervened during burning, the most easily make student produce debug-item phobia, be unfavorable for learning
Give birth to the study of specialized courses and put into practice the raising of technical ability, and hindering the cultivation of student's Creative Thinking.
This utility model is achieved through the following technical solutions:
A kind of laboratory power of alterating and direct current short-circuit protection, it is characterised in that: described protection device is arranged at power supply (1)
And between load (18), protection device is mainly by fuse (2), auxiliary reclay, light emitting diode, resistance and button string also
Connection forms；Described auxiliary reclay includes cutting off load power source auxiliary reclay KA1, short action auxiliary reclay KA2, power supply
Output auxiliary reclay KA3, auxiliary reclay is 8 foot auxiliary reclays of band base；Described light emitting diode includes load
Short circuit indication light diode VD1(8), normal power supply indication light diode VD2(12)；Described resistance includes that load short circuits refers to
Show resistance flowing resistance R1(7), normal power supply instruction current-limiting resistance R2(11)；Described button includes short-circuit protection SR SB1
(3), short-circuit protection out-put supply starting button SB2(10), protection device performance test button SB3(17).
The further Technological improvement plan of this utility model is:
Described cut-out load power source auxiliary reclay KA1 includes coil (5), normally opened contact (6), normally-closed contact (16), short
Action auxiliary reclay KA2 in road includes coil (9), normally opened contact (4), power supply output auxiliary reclay KA3 include coil (15),
Normally opened contact (13,14).
The further Technological improvement plan of this utility model is:
By fuse (2), normally opened the touching of power supply output auxiliary reclay KA3 between described power supply (1) and load (18)
Point (13) is connected with the normally-closed contact (16) cutting off load power source auxiliary reclay KA1, short action auxiliary reclay KA2 coil
(9) normally opened contact (13) with power supply output auxiliary reclay KA3 is in parallel；Performance test button SB3(17) and load (18)
It is in parallel；Load short circuits instruction resistance flowing resistance R1(7) with load short circuits indication light diode VD1(8) be in series after with cut-out
Load power source auxiliary reclay KA1 coil (5) is in parallel, normal power supply instruction current-limiting resistance R2(11) send out with normal power supply instruction
Optical diode VD2(12) be in series after with power supply output auxiliary reclay KA3 coil (15) be associated.
The further Technological improvement plan of this utility model is:
Lead between described short action auxiliary reclay KA2 coil (9) and power supply output auxiliary reclay KA3 coil (15)
The normally opened contact (14) crossing power supply output auxiliary reclay KA3 is separated.
The further Technological improvement plan of this utility model is:
Described load short circuits indication light diode VD1(8) it is red light emitting diodes, normal power supply indication light two pole
Pipe VD2(12) it is green LED.
The further Technological improvement plan of this utility model is:
Described short-circuit protection SR SB1(3) it is red by cap, short-circuit protection out-put supply starting button SB2
(10) it is green by cap, protection device performance test button SB3(17) it is that yellow presses cap.
The further Technological improvement plan of this utility model is:
Described auxiliary reclay when coil obtains electric inside the display lamp that carries bright.
The further Technological improvement plan of this utility model is:
The electric pressure of described auxiliary reclay KA1, KA2, KA3 is alternating current 220V, direct current 5V, 12V, 24V, or according to negative
Carry electric pressure and need to select the auxiliary reclay of corresponding grade of rated voltage.
The further Technological improvement plan of this utility model is:
Described power supply (1) is connected with the input terminal of protection device, and load (18) is connected with the outlet terminal of protection device.
The further Technological improvement plan of this utility model is:
The components and parts of described protection device may be installed on insulation board, and being connected by circuit is constituted；Or pass through printed circuit
Plate, is fixed in the above the base of auxiliary reclay and other components and parts, and auxiliary reclay is pluggable with base to be connected.
This utility model compared with prior art, has a following obvious advantage:
This utility model uses the low-voltage electrical apparatus such as button, auxiliary reclay to realize electric automatization, electromechanical integration etc.
The power of alterating and direct current that in specialized laboratory, experimental real-training apparatus is provided carries out short-circuit protection；
1, teaching efficiency is high: when load is short-circuited, this protection device deenergization and the connection of load, protects electricity
Source, this then without frequently changing the fusible core of fuse burnt because of load short circuits, had both saved experimental real-training cost, and can improve again religion
Learn efficiency；Because satellite phenomenon during short circuit will not be produced, produced the feared state of mind when student's project both will not have been allowed to debug, can improve again
Student courageously tests and the ability of innovation bold in putting things into practice.
2, loading range it is suitable for wide: no matter load as AC load or DC load, as long as relays in the middle of changing three
The coil rating voltage of device just can meet the needs of the different electric pressure of multiple load.
3, convenient for installation and maintenance: protection device is less because of components and parts used, and connect for electric wiring, it is not related to electric wire
Road, thus academics and students all can realizing self disassembling and installation, and once there is exception, academics and students all can quickly detect with
Maintenance, very easy to use.
4, visual good: protection device for load normal power supply and be short-circuited phenomenon time instruction is provided, user passes through
Light emitting diode red, green just can be easy to whether the project that distinguishes a sequence of load during debugging exists short circuit phenomenon.
Accompanying drawing explanation
Fig. 1 is this utility model power source short-circuit protection apparatus circuit theory diagrams.
Detailed description of the invention
As it is shown in figure 1, this utility model includes power supply 1, fuse 2, button, auxiliary reclay, resistance, light emitting diode
With load 18；Alternating current power supply that described power supply 1 is provided by experimental real-training apparatus or DC source；Described fuse 2 is for preventing
This device life-time service, the action of auxiliary reclay contact does not makes power supply short circuit rapidly；Described button includes that short-circuit protection resets
Button SB1 3, short-circuit protection out-put supply starting button SB2 10, protection device performance test button SB3 17；Described
Auxiliary reclay include when load short circuits occurs cut off load power source auxiliary reclay KA1, short action auxiliary reclay KA2,
Power supply output auxiliary reclay KA3, cuts off load power source auxiliary reclay KA1 and includes coil 5, normally opened contact 6, normally-closed contact
16, short action auxiliary reclay KA2 include coil 9, normally opened contact 4, power supply output auxiliary reclay KA3 include coil 15,
Normally opened contact 13,14；Described resistance includes load short circuits instruction resistance flowing resistance R1 7, normal power supply instruction current-limiting resistance R2 11；
Described light emitting diode includes load short circuits indication light diode VD1 8, normal power supply indication light diode VD2 12, negative
Carrying short circuit indication light diode VD1 8 is red light emitting diodes, and normal power supply indication light diode VD2 12 is green
Light emitting diode；Handing-over catalyst that described load 18 is provided by experimental real-training apparatus, auxiliary reclay, electromagnetic valve, instruction
Lamp even load or executive component.
Described power supply 1 and load 18 between by fuse 2, power supply output auxiliary reclay KA3 normally opened contact 13 and
The normally-closed contact 16 cutting off load power source auxiliary reclay KA1 is connected, when normally using, power supply output auxiliary reclay KA3's
Normally opened contact 13 closes powering load, when load short circuits occurs, cuts off the normally-closed contact 16 of load power source auxiliary reclay KA1
Disconnect, so that power supply is separated with load, protect power supply；During short action auxiliary reclay KA2 coil 9 exports with power supply
Between the normally opened contact 13 of relay K A3 be in parallel, during load short circuits, the normally opened contact 13 of power supply output auxiliary reclay KA3 breaks
Opening, short action auxiliary reclay KA2 coil 9 obtains electric, and its normally opened contact 4 Guan Bi makes cut-out load power source auxiliary reclay KA1
Coil 5 electric；Protection device performance test button SB3 17 is in parallel, by pressing protection device performance button with load 18
SB3 17 carrys out fictitious load short circuit phenomenon, and whether detection protection device can switch rapidly load supplying power supply；Load short circuits indicates
Resistance flowing resistance R1 7 and load short circuits indication light diode VD1 8 be in series after with cut off load power source auxiliary reclay KA1
Coil 5 is associated, and during load short circuits, indication light diode VD1 8 is bright for load short circuits；Normal power supply instruction current-limiting resistance R2
11 to normal power supply instruction green LED VD2 12 be in series after with power supply output auxiliary reclay KA3 coil 15 relevant
Connection, during normal power supply, instruction green LED VD2 12 is bright for normal power supply；Described short-circuit protection SR SB1 3 is
Redness presses cap, short-circuit protection out-put supply starting button SB2 10 presses cap, protection device performance test button SB3 for green
17 press cap for yellow；Described auxiliary reclay KA1, KA2, KA3 are 8 foot miniature intermediate relays of band base, and coil
The display lamp carried inside when obtaining electric is bright, and its coil rating electric pressure is the most frequently used alternating current 220V, direct current 5V, 12V, 24V, also
Can need to select the auxiliary reclay of other grade of rated voltages according to load voltage grade on experimental real-training apparatus；Described short circuit
Auxiliary reclay is exported by power supply between action auxiliary reclay KA2 coil 9 and power supply output auxiliary reclay KA3 coil 15
The normally opened contact 14 of KA3 is separated, and during accordingly even when this protection device is connected power supply and do not worked, continues in the middle of short action
Electrical equipment KA2 coil 9 also will not be connected with power supply output auxiliary reclay KA3 coil 15 and be accessed circuit and waste electric energy and shorten certainly
Body service life；The all components and parts of described protection device both may be installed on insulation board, and being connected by circuit is constituted, and is so easy to
Dismounting；Also can pass through printed circuit board, the base of auxiliary reclay and other components and parts are fixed in the above, but auxiliary reclay
Pluggable；Described protection device is provided with electric power incoming line terminal and power output terminal, it is simple to uses and connects power supply and load.
Operation principle of the present utility model is sketched in conjunction with Fig. 1:
First user disconnects experimental real-training apparatus power supply, the AC or DC then provided by experimental real-training apparatus electricity
This apparatus for protecting power supply is accessed in source, more all loads are accessed the power supply output of this apparatus for protecting power supply by corresponding connected mode
End.When user need debug circuit or write program time, experimental real-training apparatus on and off switch is closed, then presses short circuit
Protection device out-put supply starting button SB2 10, power supply output auxiliary reclay KA3 coil 15 obtains electric, its normally opened contact 13,
14 Guan Bis, now power supply is through fuse 2, short-circuit protection SR SB1 3, normally opened the touching of power supply output auxiliary reclay KA3
The normally-closed contact 16 of point 13 and cut-out load power source auxiliary reclay KA1 powers to the load, because its normally opened contact 13,14 closes,
Make power supply output auxiliary reclay KA3 achieve auto-lock function, the most then can power to load continuous.Meanwhile, normal power supply
Diode VD2 12 is bright for indication light, shows that this protection device powers to the load normally.
When load is short-circuited, power supply exports auxiliary reclay KA3 coil 15 two ends isoelectric level and is 0V, at this moment power supply
Output auxiliary reclay KA3 coil 15 dead electricity, its normally opened contact 13,14 disconnects；Because now load remains as short-circuit condition, to short
Road action auxiliary reclay KA2 coil 9 provides electric power loop, and electric power loop is: " power supply one end is through fuse 2, short-circuit protection
SR SB13, short action auxiliary reclay KA2 coil 9, the normally-closed contact of cut-out load power source auxiliary reclay KA1
16, the continuous lines of load short circuits is made to the power supply other end " so that short action auxiliary reclay KA2 coil 9 obtains electric, and it is normally opened
Contact 4 closes, and makes again to cut off load power source auxiliary reclay KA1 coil 5 and obtains electric, and its normally opened contact 6 Guan Bi realizes self-locking merit
Can, its normally-closed contact 16 disconnects, thus has cut off the connection between power supply and load, protects power supply.Meanwhile, load short
Indication light diode VD1 8 is bright on road, shows that the load that user is connected exists short circuit phenomenon, reminds user deenergization
Switch, gets rid of load short circuits problem.After short circuit problem is got rid of by user, power turn-on and to press short-circuit protection defeated again
Going out power activation button SB2 10, provide power supply to load, its work process is same as above.
User, can be by pressing short-circuit protection SR in the case of not cutting off experimental real-training apparatus on and off switch
SB1 3 so that cutting off coil 5 dead electricity of load power source auxiliary reclay KA1, its normally opened contact 6 disconnects, and normally-closed contact 16 closes
Close.Meanwhile, load short circuits indication light diode VD1 8 extinguishes.Or make by directly cutting off experimental real-training apparatus on and off switch
Obtain load short circuits instruction red light emitting diodes VD1 8 to extinguish.
Before protection device does not uses for a long time and will come into operation, or user wants to test the property of protection device
During energy, first press short-circuit protection out-put supply starting button SB2 10, make protection device normally power to the load, certainly
Now it is not connected to any load, presses protection device performance test button SB3 17, simulate connect load and be short-circuited, observe short
Road action auxiliary reclay KA2 coil 9 whether action, if action, then the coil 5 cutting off load power source auxiliary reclay KA1 is
No action, if action, short action auxiliary reclay KA2 coil 9 dead electricity the most at once, meanwhile, load short circuits indication light
Whether diode VD1 8 is lit, if load short circuits indication light diode VD1 8 is lit, then it is multiple to press short-circuit protection
Position button SB 13, observes the coil 5 whether dead electricity now cutting off load power source auxiliary reclay KA1, load short circuits indication light
Whether diode VD1 8 extinguishes, if extinguishing, illustrating that protection device protective value is good, can come into operation.
User can be changed electric pressure therewith match according to the needs of load voltage grade in experimental real-training chamber device
Three auxiliary reclays, i.e. pull out plug and play, the most convenient.Meanwhile, because protection device composition components and parts are less, and circuit is even
Connect fairly simple, so maintenance is the most convenient.
Technological means disclosed in this utility model scheme is not limited only to the technological means disclosed in above-mentioned embodiment, also
Including the technical scheme being made up of above technical characteristic combination in any.It should be pointed out that, the ordinary skill for the art
For personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve and profit
Decorations are also considered as protection domain of the present utility model.
Claims (10)
1. a laboratory power of alterating and direct current short-circuit protection, it is characterised in that: described protection device be arranged at power supply (1) with
Between load (18), protection device is mainly by fuse (2), auxiliary reclay, light emitting diode, resistance and button connection in series-parallel
Form；Described auxiliary reclay includes that cut-out load power source auxiliary reclay KA1, short action auxiliary reclay KA2, power supply are defeated
Going out auxiliary reclay KA3, auxiliary reclay is 8 foot auxiliary reclays of band base；Described light emitting diode includes loading short
Road indication light diode VD1(8), normal power supply indication light diode VD2(12)；Described resistance includes that load short circuits indicates
Resistance flowing resistance R1(7), normal power supply instruction current-limiting resistance R2(11)；Described button includes short-circuit protection SR SB1(3),
Short-circuit protection out-put supply starting button SB2(10), protection device performance test button SB3(17).
A kind of laboratory power of alterating and direct current short-circuit protection the most according to claim 1, it is characterised in that: described cut-out
Load power source auxiliary reclay KA1 includes coil (5), normally opened contact (6), normally-closed contact (16), short action auxiliary reclay
KA2 includes that coil (9), normally opened contact (4), power supply output auxiliary reclay KA3 include coil (15), normally opened contact (13,14).
A kind of laboratory power of alterating and direct current short-circuit protection the most according to claim 2, it is characterised in that: described power supply
(1) and loaded by fuse (2), the normally opened contact (13) of power supply output auxiliary reclay KA3 and cut-out between load (18)
The normally-closed contact (16) of power supply auxiliary reclay KA1 is connected, during short action auxiliary reclay KA2 coil (9) exports with power supply
Between the normally opened contact (13) of relay K A3 be in parallel；Performance test button SB3(17) it is in parallel with load (18)；Load short circuits
Instruction resistance flowing resistance R1(7) with load short circuits indication light diode VD1(8) be in series after with cut off relay in the middle of load power source
Device KA1 coil (5) is in parallel, normal power supply instruction current-limiting resistance R2(11) and normal power supply indication light diode VD2(12)
It is associated with power supply output auxiliary reclay KA3 coil (15) after being in series.
4. according to a kind of laboratory power of alterating and direct current short-circuit protection described in Claims 2 or 3, it is characterised in that: described
In being exported by power supply between short action auxiliary reclay KA2 coil (9) and power supply output auxiliary reclay KA3 coil (15)
Between relay K A3 normally opened contact (14) be separated.
A kind of laboratory power of alterating and direct current short-circuit protection the most according to claim 1 and 2, it is characterised in that: described
Load short circuits indication light diode VD1(8) it is red light emitting diodes, normal power supply indication light diode VD2(12) be
Green LED.
A kind of laboratory power of alterating and direct current short-circuit protection the most according to claim 1 and 2, it is characterised in that: described
Short-circuit protection SR SB1(3) be red by cap, short-circuit protection out-put supply starting button SB2(10) it is that green is pressed
Cap, protection device performance test button SB3(17) it is that yellow presses cap.
A kind of laboratory power of alterating and direct current short-circuit protection the most according to claim 1 and 2, it is characterised in that: described
Auxiliary reclay when coil obtains electric inside the display lamp that carries bright.
A kind of laboratory power of alterating and direct current short-circuit protection the most according to claim 1 and 2, it is characterised in that: described
The electric pressure of auxiliary reclay KA1, KA2, KA3 is alternating current 220V, direct current 5V, 12V, 24V, or according to load voltage grade need
Select the auxiliary reclay of corresponding grade of rated voltage.
A kind of laboratory power of alterating and direct current short-circuit protection the most according to claim 1 and 2, it is characterised in that: described
Power supply (1) is connected with the input terminal of protection device, and load (18) is connected with the outlet terminal of protection device.
A kind of laboratory power of alterating and direct current short-circuit protection the most according to claim 1 and 2, it is characterised in that: described
The components and parts of protection device may be installed on insulation board, and being connected by circuit is constituted；Or by printed circuit board, by centre relay
The base of device and other components and parts are fixed in the above, and auxiliary reclay is pluggable with base to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620880502.2U CN205863891U (en) | 2016-08-15 | 2016-08-15 | A kind of laboratory power of alterating and direct current short-circuit protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620880502.2U CN205863891U (en) | 2016-08-15 | 2016-08-15 | A kind of laboratory power of alterating and direct current short-circuit protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205863891U true CN205863891U (en) | 2017-01-04 |
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ID=57594156
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620880502.2U Expired - Fee Related CN205863891U (en) | 2016-08-15 | 2016-08-15 | A kind of laboratory power of alterating and direct current short-circuit protection |
Country Status (1)
| Country | Link |
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| CN (1) | CN205863891U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099839A (en) * | 2016-08-15 | 2016-11-09 | 淮安信息职业技术学院 | A kind of laboratory power of alterating and direct current short-circuit protection |
-
2016
- 2016-08-15 CN CN201620880502.2U patent/CN205863891U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099839A (en) * | 2016-08-15 | 2016-11-09 | 淮安信息职业技术学院 | A kind of laboratory power of alterating and direct current short-circuit protection |
| CN106099839B (en) * | 2016-08-15 | 2018-05-04 | 淮安信息职业技术学院 | A kind of laboratory power of alterating and direct current short-circuit protection |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20190815 |
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| CF01 | Termination of patent right due to non-payment of annual fee |