CN207283145U - A kind of multifunction protection on-load switch fuse combined electric apparatus and circuit structure - Google Patents
A kind of multifunction protection on-load switch fuse combined electric apparatus and circuit structure Download PDFInfo
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- CN207283145U CN207283145U CN201721260394.XU CN201721260394U CN207283145U CN 207283145 U CN207283145 U CN 207283145U CN 201721260394 U CN201721260394 U CN 201721260394U CN 207283145 U CN207283145 U CN 207283145U
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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 on-load switch fuse combined electric apparatus and circuit structure.The utility model is by the way that on the basis of traditional on-load switch fuse combined electric apparatus, 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 there are abnormal conditions, comprehensive relay protection device realizes outgoing line cabinet specified time overcurrent, quick-break, zero sequence, temperature, protection and voltage monitoring multifunction protection；When short trouble occurs, circuital current increases several times suddenly, and fuse quick fuse, cuts off short trouble, reach quick-break effect.The cost of investment of the utility model is small, and operating cost is low, overcome the shortcomings that breaker protection reaction speed is slow and conventional combination electric appliance cannot precisely determine after overload electric current working value and each protection act must replacement fuse the problem of.
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 switch fuse combined electrical apparatus and circuit structure.
Background technology
The relaying configuration of distribution transformer generally uses two kinds of breaker and on-load switch fuse combined electric apparatus at present, it
Be different in technology and economic aspect.Dry-type transformer capacity is no more than 800kVA, and oil-immersed transformer capacity is no more than
630kVA, can be with configuration load switch fuse combined electrical apparatus；Dry-type transformer capacity 1000kVA and more than, oil immersed type transformation
Device capacity reach 800kVA and more than, must configuration breaker.
However, breaker protection there are reaction speed it is slow the shortcomings that：When oil-immersed transformer short circuit occurred inside failure,
Short circuit current flow is very big, if cannot cut off short trouble within 20 ms times, may result in the badly damaged of transformer；And
The switch off time of breaker is made of 3 parts：Relay protection actuation time, breaker intrinsic actuation time and arc time,
Take more than 60 ms；Although visible break device has acted, since actuation time is still damaged more than 20 ms, transformer
It is bad；And breaker cost of investment is big, construction is complicated, must periodic inspection.Traditional on-load switch fuse combined electric apparatus is for mistake
Load current value belongs to Fuzzy Calculation, and fusing is realized by fuse accumulation thermal energy, it is impossible to precisely definite overload electric current working value,
It can not realize to functions such as transformer zero-sequenceprotection, temperature protection, protection, o-volt protection and voltage monitorings；And protect
Scheme operating cost is big, and fuse must be replaced after each protection act.
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, quick-break, zero sequence, temperature, the on-load switch fuse combined electric apparatus of protection and voltage monitoring multifunction protection.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of multifunction protection on-load switch fuse combined electric apparatus, including the on-load switch of electrical connection and fusing are provided
Device, the on-load switch are installed in transformer outgoing line cabinet with the fuse；The combined electrical apparatus, which further includes to be used for realization, to be determined
Time limit overcurrent, quick-break electric current, zero-sequence current, temperature, protection, the comprehensive relay protection device and use of voltage monitoring protection
In the current transformer and zero sequence current mutual inductor of observation circuit electric current, the comprehensive relay protection device, on-load switch, fusing
Device, current transformer, zero sequence current mutual inductor are sequentially electrically connected.
The multifunction protection on-load switch fuse combined electric apparatus of the utility model, passes through setting for comprehensive relay protection device
Put and the multifunction protections such as specified time overcurrent, quick-break, zero sequence, temperature, protection and voltage monitoring are realized to outgoing line cabinet；Pass through
The setting of on-load switch carries out separating brake or combined floodgate to outgoing line cabinet；By the setting of fuse, when fault current exceedes transfer current
Or during take-over current, fuse is acted in first half-wave in 10 ms, fuse blows, short trouble, responsiveness are cut off
It is faster than 60 ms of actuation time of breaker；By the setting observation circuit electric current of current transformer, when circuital current reaches timing
When limiting overcurrent value, triggering comprehensive relay protection device action, tripping on-load switch；Monitored by the setting of zero sequence current mutual inductor
Circuital current, when circuit out-of-balance current reaches setting valve, comprehensive relay protection device zero-sequenceprotection action, tripping load is opened
Close.
Preferably, the combined electrical apparatus further includes the electric operating system for electronic division on-load switch, 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 to outgoing line cabinet realize specified time overcurrent, quick-break, zero sequence,
The multifunction protections such as temperature, protection and voltage monitoring.
Preferably, the current transformer is one kind in straight-through current transformer or open type current transformer.
On the basis of traditional on-load switch fuse combined electric apparatus, increase by four straight-through current transformers or open type Current Mutual Inductance
Device, cost of investment are small.
The utility model additionally provides a kind of multifunction protection on-load switch fuse combinational circuit, including is stored up for circuit
The energy storage branch of energy, combined floodgate branch, separating brake branch and use for controlling outgoing line cabinet separating brake for controlling outgoing line cabinet to close a floodgate
In the tripping branch of outgoing line cabinet traffic overload protection, the energy storage branch, combined floodgate branch, separating brake branch, tripping branch circuit parallel connection electricity
Connection.
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.
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 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,
Zero-sequencedirectional protection device FA1-2, high-temperature alarming device FA1-3, overtemperature tripgear FA1-4, light gas alarm device FA1-5
Formed with grave gas tripgear FA1-6.
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；When dry-type transformer temperature reaches setting valve, triggering
The temperature protection action of comprehensive relay protection device FA, triggering high-temperature alarming device FA1-3 is transmitted during high temperature, and triggering is super during overtemperature
Warm tripgear FA1-4 trippings；When gas failure occurs for oil-immersed transformer, the gas of triggering comprehensive relay protection device FA is protected
Shield acts, and light gas triggers light gas alarm device FA1-5 alarms, grave gas triggering grave gas tripgear FA1-6 trippings.When
During generation short trouble, circuital current increases several times suddenly, and fuse acts in first half-wave, that is, 10ms, quick fuse,
Short trouble is cut off, reaches quick-break effect.
Compared with prior art, the beneficial effects of the utility model are：
（1）Cut off the quick action of failure：When fault current exceedes transfer current or take-over current, fuse is
Action in one half-wave i.e. 10 ms, fuse blows, cut off short trouble, actuation time 60 ms of the responsiveness than breaker
It hurry up.
（2）It can realize the multifunction protection to outgoing line cabinet：Can be precisely real by the setting of comprehensive relay protection device
Now definite time-lag the multifunction protections such as overcurrent protection, zero-sequenceprotection, temperature protection, protection and voltage detecting.
（3）Cost of investment is small, and operating cost is low：On the basis of traditional on-load switch fuse combined electric apparatus, increase
Comprehensive relay protection device and straight-through current transformer, cost of investment is small, and reaches multifunction protection；When circuital current is more than
When definiting time-lag overcurrent value, comprehensive relay protection device specified time overcurrent protection action, makes on-load switch separating brake, and fuse from
Damage, greatly reduces operating cost, overcomes the problem of fuse must be replaced after each protection act of conventional combination electric appliance.
Brief description of the drawings
Fig. 1 is the structure diagram of the multifunction protection on-load switch fuse combined electric apparatus of the utility model.
Fig. 2 is the secondary tie lines schematic diagram of multifunction protection on-load switch fuse combinational circuit.
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
It is the embodiment of the multifunction protection on-load switch fuse combined electric apparatus of the utility model as shown in Figure 1, including
The on-load switch 2 and fuse 3 of electrical connection, on-load switch 2 are installed in transformer outgoing line cabinet with fuse 3；Further include and be used for
Realize specified time overcurrent, quick-break electric current, zero-sequence current, temperature, protection, the comprehensive relay protection device of voltage monitoring protection
1 and current transformer 4, zero sequence current mutual inductor 5 and electric operating system 6 for observation circuit electric current, comprehensive relay is protected
Protection unit 1, on-load switch 2, fuse 3, current transformer 4, zero sequence current mutual inductor 5 are sequentially electrically connected, electric operating system 6
It is connected to on-load switch 2；During operation, not only can manual division on-load switch, but also can be with electronic division on-load switch.
Wherein, comprehensive relay protection device 1 includes the first comprehensive relay protection device FA1 and second in parallel being electrically connected
Comprehensive relay protection device FA2, can realize outgoing line cabinet specified time overcurrent, quick-break, zero sequence, temperature, protection and voltage
Multifunction protection, the current transformers 4 such as monitoring are straight-through current transformer；In traditional on-load switch fuse combined electric apparatus
On the basis of, increase by 1, four straight-through current transformer 4 of comprehensive relay protection device, cost of investment is small, and reaches multi-functional
Protection.
Embodiment two
The embodiment of the multifunction protection on-load switch fuse combinational circuit of the utility model is illustrated in figure 2, including
Energy storage branch for circuit energy storage, combined floodgate branch, the separating brake for controlling outgoing line cabinet separating brake for controlling outgoing line cabinet to close a floodgate
Branch and the tripping branch for the protection of outgoing line cabinet traffic overload, energy storage branch, combined floodgate branch, separating brake branch, tripping branch
Parallel connection is electrically connected.
Specifically, the energy storage branch route tank circuit in parallel being electrically connected and energy storage instruction circuit composition；Tank circuit includes
The normally-closed contact CK1-1 of the control switch ZK, energy storage motor D and the travel switch CK that are connected in series, energy storage instruction circuit include
The normally opened contact CK1-2 of the energy storage indicator light BD being connected in series and travel switch CK.
The combined floodgate branch route closing circuit in parallel being electrically connected and the instruction circuit composition that closes a floodgate；Closing circuit includes being connected in series
Controlling switch KK the 5th contact KK1-5, the 6th contact KK1-6 and closing coil HQ, close a floodgate instruction circuit refer to including combined floodgate
Show the normally opened contact FK1-1 of lamp 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
Protective relaying device FA1 is by the specified time overcurrent protective device FA1-1 in parallel being electrically connected, zero-sequencedirectional protection device FA1-2, height
Temperature alarm device FA1-3, overtemperature tripgear FA1-4, light gas alarm device FA1-5 and grave gas tripgear FA1-6 groups
Into.
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；When dry-type transformer temperature reaches setting valve, triggering
The temperature protection action of comprehensive relay protection device FA, triggering high-temperature alarming device FA1-3 is transmitted during high temperature, and triggering is super during overtemperature
Warm tripgear FA1-4 trippings；When gas failure occurs for oil-immersed transformer, the gas of triggering comprehensive relay protection device FA is protected
Shield acts, and light gas triggers light gas alarm device FA1-5 alarms, grave gas triggering grave gas tripgear FA1-6 trippings；When
During generation short trouble, circuital current increases several times suddenly, and fuse acts in first half-wave, that is, 10ms, quick fuse,
Short trouble is cut off, reaches quick-break effect.
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 on-load switch fuse combined electric apparatus, includes the on-load switch of electrical connection（2）And fuse
（3）, the on-load switch（2）With the fuse（3）It is installed in transformer outgoing line cabinet；It is used for it is characterized in that, further including
Realize the comprehensive relay protection device of overcurrent protection, temperature protection and protection（1）And the electricity for observation circuit electric current
Current transformer（4）And zero sequence current mutual inductor（5）, the comprehensive relay protection device（1）, on-load switch（2）, fuse（3）、
Current transformer（4）, zero sequence current mutual inductor（5）Sequentially it is electrically connected.
2. multifunction protection on-load switch fuse combined electric apparatus according to claim 1, it is characterised in that the combination
Electric appliance further includes the electric operating system for electronic division on-load switch（6）, the electric operating system（6）It is connected to described
On-load switch（2）.
3. multifunction protection on-load switch fuse combined electric apparatus according to claim 1, it is characterised in that the synthesis
Protective relaying device（1）The first comprehensive relay protection device FA1 being electrically connected including parallel connection and the second integrated technical reformation dress
Put FA2.
4. multifunction protection on-load switch fuse combined electric apparatus according to any one of claims 1 to 3, its feature exist
In the current transformer（4）For one kind in straight-through current transformer or open type current transformer.
5. a kind of multifunction protection on-load switch fuse combinational circuit, it is characterised in that including the energy storage for circuit energy storage
Branch, combined floodgate branch, the separating brake branch for controlling outgoing line cabinet separating brake and for outgoing line cabinet for controlling outgoing line cabinet to close a floodgate
The tripping branch of traffic overload protection, the energy storage branch, combined floodgate branch, separating brake branch, tripping branch circuit parallel connection are electrically connected.
6. multifunction protection on-load switch fuse combinational circuit 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.
7. multifunction protection on-load switch fuse combinational circuit according to claim 5, it is characterised in that the combined floodgate
The branch route closing circuit in parallel being electrically connected and the instruction circuit composition that closes a floodgate；The control that the closing circuit includes being connected in series is opened
KK and closing coil HQ are closed, the instruction circuit of closing a floodgate includes the normally opened contact FK1-1 of combined floodgate indicator light HD and on-load switch FK.
8. multifunction protection on-load switch fuse combinational circuit according to claim 5, it is characterised in that the separating brake
The branch route sub-gate circuit in parallel being electrically connected and separating brake instruction circuit composition；The control that the sub-gate circuit includes being connected in series is opened
KK and switching winding TQ are closed, the separating brake instruction circuit includes the normally-closed contact FK1-2 of separating brake indicator light LD and on-load switch FK.
9. the multifunction protection on-load switch fuse combinational circuit according to claim 7 or 8, it is characterised in that described
Controlling switch KK includes the 5th contact KK1-5, the 6th contact KK1-6, the 7th contact KK1-7 and the 8th contact KK1-8, described
5th 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.
10. multifunction protection on-load switch fuse combinational circuit according to claim 5, it is characterised in that the jump
Lock branch includes the first comprehensive relay protection device FA1, the second comprehensive relay protection device FA2 and connection sheet 1LP；Described first
Comprehensive relay protection device FA1 and the connection sheet 1LP be parallel to after being connected in series controlling switch KK the 7th contact KK1-7,
The both ends of 8th contact KK1-8, the second comprehensive relay protection device FA2 are connected with separating brake branch circuit parallel connection；Described first is comprehensive
Close protective relaying device FA1 by parallel connection be electrically connected specified time overcurrent protective device FA1-1, zero-sequencedirectional protection device FA1-2,
High-temperature alarming device FA1-3, overtemperature tripgear FA1-4, light gas alarm device FA1-5 and grave gas tripgear FA1-6
Composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721260394.XU CN207283145U (en) | 2017-09-28 | 2017-09-28 | A kind of multifunction protection on-load switch fuse combined electric apparatus and circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721260394.XU CN207283145U (en) | 2017-09-28 | 2017-09-28 | A kind of multifunction protection on-load switch fuse combined electric apparatus and circuit structure |
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| Publication Number | Publication Date |
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| CN207283145U true CN207283145U (en) | 2018-04-27 |
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ID=61988336
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634500A (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 on-load switch fuse combined electric apparatus and circuit structure |
-
2017
- 2017-09-28 CN CN201721260394.XU patent/CN207283145U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634500A (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 on-load switch fuse combined electric apparatus and circuit structure |
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