CN207283146U - A kind of multifunction protection loading switch cabinet and circuit structure - Google Patents
A kind of multifunction protection loading switch cabinet and circuit structure Download PDFInfo
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- CN207283146U CN207283146U CN201721260395.4U CN201721260395U CN207283146U CN 207283146 U CN207283146 U CN 207283146U CN 201721260395 U CN201721260395 U CN 201721260395U CN 207283146 U CN207283146 U CN 207283146U
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Abstract
The technical field of distribution transformer protection is the utility model is related to, more particularly, to a kind of multifunction protection load cabinet and circuit structure.The utility model is by the way that on the basis of traditional on-load switch, increase comprehensive relay protection device, current transformer and zero sequence current mutual inductor, when load normal operation, comprehensive relay protection device is failure to actuate；When traffic overload is run, and circuital current reaches specified time overcurrent value, the specified time overcurrent protection action of triggering specified time overcurrent protective device, makes on-load switch separating brake；When circuit out-of-balance current reaches setting valve, the zero-sequenceprotection action of triggering zero-sequencedirectional protection device, makes on-load switch separating brake；The cost of investment of the utility model is small, and avoids client's accident caused by traditional on-load switch is configured without protection and go out.
Description
Technical field
The technical field of distribution transformer protection is the utility model is related to, is born more particularly, to a kind of multifunction protection
Lotus switchgear and circuit structure.
Background technology
The relaying configuration of distribution transformer is generally using on-load switch, breaker and on-load switch-fuse combination at present
Three kinds of electric appliance, they are different in technology and economic aspect.However, breaker protection there are reaction speed it is slow the shortcomings that：When
During oil-immersed transformer short circuit occurred inside failure, short circuit current flow is very big, if cannot cut off short-circuit event within 20 ms times
Barrier, may result in the badly damaged of transformer；And the switch off time of breaker is made of 3 parts：Relay protection actuation time, break
Road device intrinsic actuation time and arc time, take more than 60 ms；Although visible break device has acted, due to action
Time is still damaged more than 20 ms, transformer；And breaker cost of investment is big, construction is complicated, must periodic inspection.Traditional
Switch-fuse combination belongs to Fuzzy Calculation for overload electric current value, and fusing is realized by fuse accumulation thermal energy,
It cannot precisely determine overload electric current working value, can not realize the function to transformer zero-sequenceprotection；And protection scheme operation into
This is big, and fuse must be replaced after each protection act.When dry-type transformer capacity is no more than 800kVA, incoming line cabinet is generally using negative
Lotus switchs, and is configured without protecting, is easy to cause client's accident and gos out；When client's accident is gone out, substation is caused cabinet jump occur,
And then expand accident scope.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, there is provided one kind can realize outgoing line cabinet and definite time-lag
Overcurrent and the loading switch cabinet and circuit structure of zero-sequenceprotection.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of multifunction protection loading switch cabinet is provided, including the first Room, second Room and the 3rd Room being linked in sequence, institute
State first it is indoor be equipped with the comprehensive relay protection device for being used for realization specified time overcurrent protection and zero-sequencedirectional protection, described second
Interior is equipped with on-load switch, the described 3rd indoor current transformer and zero sequence current mutual inductance being equipped with for observation circuit electric current
Device, the comprehensive relay protection device, on-load switch, current transformer, zero sequence current mutual inductor are sequentially electrically connected.
The multifunction protection loading switch cabinet of the utility model, it is real to outgoing line cabinet by the setting of comprehensive relay protection device
Now definite time-lag the multifunction protection such as overcurrent protection and zero-sequence current protection；Separating brake is carried out to outgoing line cabinet by the setting of on-load switch
Or close a floodgate；Pass through the setting observation circuit electric current of current transformer, when circuital current reaches specified time overcurrent value, triggering synthesis
Protective relaying device acts, tripping on-load switch；By the setting observation circuit electric current of zero sequence current mutual inductor, when circuit is uneven
When weighing apparatus electric current reaches setting valve, comprehensive relay protection device zero-sequenceprotection action, tripping on-load switch.
Preferably, the electric operating system for electronic division on-load switch is additionally provided with the second Room, it is described electronic
Operating system is connected to the on-load switch.Electric operating system realizes electronic disconnection or closes on-load switch, in the mistake of operation
Cheng Zhong, not only can manual division on-load switch, but also can be with electronic division on-load switch.
Preferably, the comprehensive relay protection device include in parallel the first comprehensive relay protection device FA1 being electrically connected with
And the second comprehensive relay protection device FA2.Comprehensive relay protection device can realize outgoing line cabinet specified time overcurrent protection and zero
The multifunction protections such as sequence current protection.
Preferably, the current transformer is one kind in straight-through current transformer or open type current transformer.
On traditional loading switch cabinet, increase by four straight-through current transformers or open type current transformer, cost of investment are small.
The utility model additionally provides a kind of circuit structure of multifunction protection loading switch cabinet, including for controlling outlet
The combined floodgate branch of cabinet combined floodgate, the separating brake branch for controlling outgoing line cabinet separating brake, the tripping branch for the protection of outgoing line cabinet traffic overload
Road and the energy storage branch for circuit energy storage, the combined floodgate branch, separating brake branch, tripping branch, energy storage branch circuit parallel connection are electrically connected
Connect.
Preferably, the combined floodgate branch route closing circuit in parallel being electrically connected and the instruction circuit composition that closes a floodgate；The combined floodgate
Circuit includes combined floodgate indicator light HD and bears including the controlling switch KK being connected in series and closing coil HQ, the instruction circuit of closing a floodgate
Lotus switchs the normally opened contact FK1-1 of FK.Controlling switch KK is rotated manually, connects closing circuit, and closing coil HQ is powered, and triggering is closed
Brake mechanism acts, and closes a tie lines on-load switch FK；Meanwhile on-load switch normally opened contact FK1-1 closes, instruction of closing a floodgate is connected
Circuit, combined floodgate indicator light HD are bright.
Preferably, the separating brake branch route sub-gate circuit in parallel being electrically connected and separating brake instruction circuit composition；The separating brake
Circuit includes the controlling switch KK being connected in series and switching winding TQ, and the separating brake instruction circuit includes separating brake indicator light LD and bears
Lotus switchs the normally-closed contact FK1-2 of FK.Controlling switch KK is rotated manually, connects sub-gate circuit, and switching winding TQ is powered, triggering point
Brake mechanism acts, and separates a tie lines on-load switch FK；Meanwhile on-load switch normally-closed contact FK1-2 closes, separating brake instruction is connected
Circuit, separating brake indicator light LD are bright.
Preferably, the controlling switch KK include the 5th contact KK1-5, the 6th contact KK1-6, the 7th contact KK1-7 with
And the 8th contact KK1-8, the 5th contact KK1-5 and the 6th contact KK1-6 are connected in the closing circuit, the described 7th
Contact KK1-7 and the 8th contact KK1-8 are connected in the sub-gate circuit.In making process, controlling switch KK is rotated manually, even
The 5th contact KK1-5, the 6th contact KK1-6 are met, connects closing circuit；During separating brake, controlling switch KK, connection are rotated manually
7th contact KK1-7, the 8th contact KK1-8, connect sub-gate circuit.
Preferably, the tripping branch includes the first comprehensive relay protection device FA1, the second comprehensive relay protection device
FA2 and connection sheet 1LP；The first comprehensive relay protection device FA1 and connection sheet 1LP is parallel to control after being connected in series
Switch the 7th contact KK1-7, the both ends of the 8th contact KK1-8 of KK, the second comprehensive relay protection device FA2 and separating brake branch
Road is connected in parallel；The first comprehensive relay protection device FA1 by parallel connection be electrically connected specified time overcurrent protective device FA1-1 and
Zero-sequencedirectional protection device FA1-2 is formed.When traffic overload is run, and circuital current reaches specified time overcurrent value, triggering timing
The specified time overcurrent protection action of overcurrent protective device FA1-1 is limited, makes on-load switch FK separating brakes；When circuit out-of-balance current reaches
During setting valve, the zero-sequenceprotection action of triggering zero-sequencedirectional protection device FA1-2, tripping on-load switch FK.
Preferably, the energy storage branch route tank circuit in parallel being electrically connected and energy storage instruction circuit composition；The energy storage
Circuit includes the normally-closed contact CK1-1 for control switch ZK, energy storage motor D and the travel switch CK being connected in series, the energy storage
Indicate that circuit includes the normally opened contact CK1-2 for the energy storage indicator light BD and travel switch CK being connected in series.Main order is closed manually to open
ZK is closed, tank circuit is connected, and energy storage motor D starts energy storage；When energy storage finishes, energy storage motor D travel switch CK normally-closed contacts
CK1-1 is disconnected, and motor stops energy storage；Meanwhile energy storage motor D travel switch CK normally opened contacts CK1-2 closes, energy storage instruction is connected
Circuit, energy storage indicator light BD are bright.
Compared with prior art, the beneficial effects of the utility model are：
（1）Precisely sensing overload electric current value is realized by the setting of current transformer, is moved by comprehensive relay protection device
Make, it is accurate to realize specified time overcurrent protection；
（2）Precisely sensing out-of-balance current value is realized by the setting of zero sequence current mutual inductor, is filled by integrated technical reformation
Action is put, accurately realizes zero-sequenceprotection；
（3）Cost of investment is small：On the basis of traditional loading switch cabinet, increase comprehensive relay protection device and punching
Current transformer, cost of investment is small, and reaches multifunction protection.
Brief description of the drawings
Fig. 1 is the structure diagram of the multifunction protection loading switch cabinet of the utility model.
Fig. 2 is the secondary tie lines schematic diagram of the circuit structure of multifunction protection loading switch cabinet.
Embodiment
The utility model is further described with reference to embodiment.Wherein, being given for example only property of attached drawing
Illustrate, expression is only schematic diagram, rather than pictorial diagram, it is impossible to is interpreted as the limitation to this patent；In order to which this reality is better described
With new embodiment, some components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To ability
For field technique personnel, some known features and its explanation may be omitted and will be understood by attached drawing.
The same or similar label correspond to the same or similar components in the attached drawing of the utility model embodiment；In this practicality
In new description, it is to be understood that if thering is the orientation of the instructions such as term " on ", " under ", "left", "right" or the position relationship to be
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than instruction
Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore retouched in attached drawing
State the term of position relationship only for illustration, it is impossible to the limitation to this patent is interpreted as, for the common skill of this area
For art personnel, the concrete meaning of above-mentioned term can be understood as the case may be.
Embodiment one
As shown in Figure 1 for the utility model multifunction protection loading switch cabinet embodiment, including the to be linked in sequence
One Room 1,2 and the 3rd Room 3 of second Room, are equipped with the first Room 1 and are used for realization specified time overcurrent protection and zero-sequencedirectional protection
Comprehensive relay protection device 11, second Room 2 is interior to be equipped with on-load switch 21 and electric operating system 22, is equipped with and is used in the 3rd Room 3
The current transformer 31 and zero sequence current mutual inductor 32 of observation circuit electric current, comprehensive relay protection device 11, on-load switch 21, electricity
Current transformer 31, zero sequence current mutual inductor 32 are sequentially electrically connected, and electric operating system 22 is connected to on-load switch 21；In operation
During, not only can manual division on-load switch, but also can be with electronic division on-load switch.
Wherein, comprehensive relay protection device 11 includes in parallel the first comprehensive relay protection device FA1 being electrically connected and the
Two comprehensive relay protection device FA2, can realize outgoing line cabinet specified time overcurrent protection and zero-sequenceprotection, and current transformer 31 is to wear
Core type current transformer；On the basis of traditional on-load switch, increase by 11, four centre path currents of comprehensive relay protection device
Mutual inductor 31, cost of investment is small, and reaches multifunction protection.
Embodiment two
It is illustrated in figure 2 the embodiment of the circuit structure of the multifunction protection loading switch cabinet of the utility model, including with
Protected in the combined floodgate branch of control outgoing line cabinet combined floodgate, the separating brake branch for controlling outgoing line cabinet separating brake, for outgoing line cabinet traffic overload
The tripping branch of shield and the energy storage branch for circuit energy storage, combined floodgate branch, separating brake branch, tripping branch, energy storage branch are simultaneously
Connection is electrically connected.
Specifically, the combined floodgate branch route closing circuit in parallel being electrically connected and the instruction circuit composition that closes a floodgate；Closing circuit includes
The 5th contact KK1-5, the 6th contact KK1-6 and the closing coil HQ for the controlling switch KK being connected in series, close a floodgate instruction circuit bag
Include the normally opened contact FK1-1 of combined floodgate indicator light HD and on-load switch FK.
The separating brake branch route sub-gate circuit in parallel being electrically connected and separating brake instruction circuit composition；Sub-gate circuit includes being connected in series
Controlling switch KK the 7th contact KK1-7, the 8th contact KK1-8 and switching winding TQ, separating brake instruction circuit refer to including separating brake
Show the normally-closed contact FK1-2 of lamp LD and on-load switch FK.
Tripping branch includes the first comprehensive relay protection device FA1, the second comprehensive relay protection device FA2 and connection sheet
1LP；First comprehensive relay protection device FA1 and connection sheet 1LP is parallel to the 7th contact of controlling switch KK after being connected in series
The both ends of KK1-7, the 8th contact KK1-8, the second comprehensive relay protection device FA2 are connected with separating brake branch circuit parallel connection；First synthesis
The specified time overcurrent protective device FA1-1 and zero-sequencedirectional protection device FA1- that protective relaying device FA1 is electrically connected by parallel connection
2。
The energy storage branch route tank circuit in parallel being electrically connected and energy storage instruction circuit composition；Tank circuit includes being connected in series
Control switch ZK, energy storage motor D and travel switch CK normally-closed contact CK1-1, energy storage instruction circuit include be connected in series
Energy storage indicator light BD and travel switch CK normally opened contact CK1-2.
The operation principle of the present embodiment is as follows：
Control switch ZK is closed manually, and tank circuit is connected, and energy storage motor D starts energy storage；When energy storage finishes, energy storage motor
D travel switch CK normally-closed contacts CK1-1 is disconnected, and motor stops energy storage；Meanwhile energy storage motor D travel switch CK normally opened contacts
CK1-2 closes, and connects energy storage instruction circuit, and energy storage indicator light BD is bright.Controlling switch KK is rotated manually, connects the 5th contact KK1-
5th, the 6th contact KK1-6, connects closing circuit, and closing coil HQ is powered, and triggering switching-on mechanism action, closes a tie lines load
Switch FK；Meanwhile on-load switch normally opened contact FK1-1 closes, instruction circuit of closing a floodgate is connected, combined floodgate indicator light HD is bright.Turn manually
Dynamic controlling switch KK, the 7th contact KK1-7 of connection, the 8th contact KK1-8 connect sub-gate circuit, and switching winding TQ is powered, triggering
Brake separating mechanism acts, and separates a tie lines on-load switch FK；Meanwhile on-load switch normally-closed contact FK1-2 closes, connect separating brake and refer to
Show circuit, separating brake indicator light LD is bright.
When load normal operation, when circuital current is less than rated current, comprehensive relay protection device is failure to actuate；
When traffic overload is run, and circuital current reaches specified time overcurrent value, triggering specified time overcurrent protective device FA1-1
Specified time overcurrent protection action, make on-load switch FK separating brakes；When circuit out-of-balance current reaches setting valve, zero sequence mistake is triggered
Flow the zero-sequenceprotection action of protective device FA1-2, tripping on-load switch FK.
Obviously, above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to the embodiment of the utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
It is exhaustive.All any modification, equivalent and improvement made where within the spirit and principles of the present invention etc., should be included in
Within the protection domain of the utility model claims.
Claims (10)
1. a kind of multifunction protection loading switch cabinet, it is characterised in that including the first Room being linked in sequence（1）, second Room（2）With
And the 3rd Room（3）, first Room（1）It is interior to be equipped with the synthesis relay for being used for realization specified time overcurrent protection and zero-sequencedirectional protection
Protective device（11）, the second Room（2）It is interior to be equipped with on-load switch（21）, the 3rd Room（3）Interior be equipped with is used for observation circuit
The current transformer of electric current（31）And zero sequence current mutual inductor（32）, the comprehensive relay protection device（11）, on-load switch
（21）, current transformer（31）, zero sequence current mutual inductor（32）Sequentially it is electrically connected.
2. multifunction protection loading switch cabinet according to claim 1, it is characterised in that the second Room（2）Inside also set
It is useful for electronic division on-load switch（21）Electric operating system（22）, the electric operating system（22）It is connected to described negative
Lotus switchs（21）.
3. multifunction protection loading switch cabinet according to claim 1, it is characterised in that the comprehensive relay protection device
（11）The the first comprehensive relay protection device FA1 and the second comprehensive relay protection device FA2 being electrically connected including parallel connection.
4. multifunction protection loading switch cabinet according to any one of claims 1 to 3, it is characterised in that the electric current is mutual
Sensor（31）For one kind in straight-through current transformer or open type current transformer.
5. a kind of circuit structure of multifunction protection loading switch cabinet, it is characterised in that including what is closed a floodgate for controlling outgoing line cabinet
Combined floodgate branch, the separating brake branch for controlling outgoing line cabinet separating brake, tripping branch and use for the protection of outgoing line cabinet traffic overload
In the energy storage branch of circuit energy storage, the combined floodgate branch, separating brake branch, tripping branch, energy storage branch circuit parallel connection are electrically connected.
6. the circuit structure of multifunction protection loading switch cabinet according to claim 5, it is characterised in that the branch of closing a floodgate
The route closing circuit in parallel being electrically connected and the instruction circuit composition that closes a floodgate；The closing circuit includes the controlling switch being connected in series
KK and closing coil HQ, the instruction circuit of closing a floodgate includes the combined floodgate indicator light HD being connected in series and the normally opened of on-load switch FK touches
Point FK1-1.
7. the circuit structure of multifunction protection loading switch cabinet according to claim 5, it is characterised in that the separating brake branch
The route sub-gate circuit in parallel being electrically connected and separating brake instruction circuit composition；The sub-gate circuit includes the controlling switch being connected in series
KK and switching winding TQ, the separating brake instruction circuit includes the separating brake indicator light LD being connected in series and the normally closed of on-load switch FK is touched
Point FK1-2.
8. the circuit structure of the multifunction protection loading switch cabinet according to claim 6 or 7, it is characterised in that the control
System switch KK includes the 5th contact KK1-5, the 6th contact KK1-6, the 7th contact KK1-7 and the 8th contact KK1-8, and described the
Five contact KK1-5 and the 6th contact KK1-6 are connected in the closing circuit, the 7th contact KK1-7 and the 8th contact
KK1-8 is connected in the sub-gate circuit.
9. the circuit structure of multifunction protection loading switch cabinet according to claim 5, it is characterised in that the tripping branch
Road includes the first comprehensive relay protection device FA1, the second comprehensive relay protection device FA2 and connection sheet 1LP；First synthesis
The protective relaying device FA1 and connection sheet 1LP is parallel to the 7th contact KK1-7 of controlling switch KK, the 8th after being connected in series
The both ends of contact KK1-8, the second comprehensive relay protection device FA2 are connected with separating brake branch circuit parallel connection；It is described first synthesis after
The specified time overcurrent protective device FA1-1 and zero-sequencedirectional protection device FA1-2 groups that electrical protective device FA1 is electrically connected by parallel connection
Into.
10. the circuit structure of multifunction protection loading switch cabinet according to claim 5, it is characterised in that the energy storage
The branch route tank circuit in parallel being electrically connected and energy storage instruction circuit composition；The main order that the tank circuit includes being connected in series is opened
The normally-closed contact CK1-1 of ZK, energy storage motor D and travel switch CK are closed, the energy storage instruction circuit includes the storage being connected in series
The normally opened contact CK1-2 of energy indicator light BD and travel switch CK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721260395.4U CN207283146U (en) | 2017-09-28 | 2017-09-28 | A kind of multifunction protection loading switch cabinet and circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721260395.4U CN207283146U (en) | 2017-09-28 | 2017-09-28 | A kind of multifunction protection loading switch cabinet and circuit structure |
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| CN207283146U true CN207283146U (en) | 2018-04-27 |
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ID=61988339
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| CN201721260395.4U Active CN207283146U (en) | 2017-09-28 | 2017-09-28 | A kind of multifunction protection loading switch cabinet and circuit structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634498A (en) * | 2017-09-28 | 2018-01-26 | 广东电网有限责任公司东莞供电局 | A kind of multifunction protection loading switch cabinet and circuit structure |
-
2017
- 2017-09-28 CN CN201721260395.4U patent/CN207283146U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634498A (en) * | 2017-09-28 | 2018-01-26 | 广东电网有限责任公司东莞供电局 | A kind of multifunction protection loading switch cabinet and circuit structure |
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