CN206930969U - A kind of main transformer cooler control loop - Google Patents
A kind of main transformer cooler control loop Download PDFInfo
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- CN206930969U CN206930969U CN201720627711.0U CN201720627711U CN206930969U CN 206930969 U CN206930969 U CN 206930969U CN 201720627711 U CN201720627711 U CN 201720627711U CN 206930969 U CN206930969 U CN 206930969U
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- contactor
- contact
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- control loop
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Abstract
The utility model belongs to field transformer, propose a kind of main transformer cooler control loop, including cooler major loop and cooler control loop, in the cooler major loop, three phase mains is connected through the first A.C. contactor, the second A.C. contactor, the 3rd A.C. contactor with work cooler, auxiliary cooler and standby cooler respectively；The coil of first A.C. contactor is connected with zero line, and the normally opened contact of the first auxiliary reclay is connected with the coil of the second A.C. contactor, and the normally opened contact of the second auxiliary reclay is connected with the coil of the 3rd A.C. contactor；In the cooler control loop, first oil temperature gauge, first normally opened contact of the second oil temperature gauge and winding temperature table is connected in series to form auxiliary stop loop, the first oil temperature gauge, and the second normally opened contact of the second oil temperature gauge and winding temperature table is connected in parallel to form assistant starting loop.The utility model improves main transformer cooler reliability of operation.
Description
Technical field
It the utility model is related to field transformer, and in particular to a kind of main transformer cooler control loop.
Background technology
Transformer due to that can produce very big heat in use, it is therefore desirable to equipped with cooling device, existing
In the single-phase double winding oil-filled transformer of DFP-240000/500 types, three groups of coolers are configured with：Work cooler, supplement heat rejecter
Device and standby cooler, during transformer station high-voltage side bus, work cooler, which automatically engages, to be cooled down, and main transformer is provided with 2 pieces of oil temperature gauges and 1
Block winding temperature table, when the temperature of any one deblocking temperature meter of transformer reaches second temperature setting value, or load current reaches
During setting value, auxiliary cooler starts, when the temperature of all temperature meters of transformer is below the first desired temperature, or it is negative
When charged current reaches setting value, auxiliary cooler is stopped transport；Transformer, oil temperature, winding temperature are with load and environment temperature
Constantly change, the contact frequent movement of temperature meter start and stop auxiliary cooler, easily causes failure, disconnects or closes forever forever
Close, when temperature meter start and stop auxiliary cooler contact due to failure causes to be ever closing with when, even if temperature and load current are all
Less than setting value, supplement heat rejecter can not be stopped, causing supplement heat rejecter to be automatically stopped loop failure, not only waste electric power resource,
It is also easy to cause auxiliary cooler failure.Therefore, it is badly in need of proposing a kind of main transformer cooler control circuit, to overcome temperature meter to open
Auxiliary cooler caused by stopping the contact failure of auxiliary cooler can not start and stop the problem of.
Utility model content
The utility model overcomes the shortcomings of the prior art, and technical problem to be solved is：It is cold to provide a kind of main transformer
But device control loop.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of main transformer cooler controls back
Road, including cooler major loop and cooler control loop, in the cooler major loop, three phase mains is respectively through the first exchange
Contactor KM1 normally opened contact KM1.1 is connected with work cooler M1, the normally opened contact KM2.1 through the second A.C. contactor KM2
It is connected with auxiliary cooler M2, is connected after the 3rd A.C. contactor KM3 normally opened contact KM3.1 with standby cooler M3；Three
Coil KM1.0 of one phase of phase power supply through the first A.C. contactor KM1 is connected with zero line, and the normally opened of the first auxiliary reclay K3 touches
Point K3.1 and the second A.C. contactor KM2 coil KM2.0 are connected in series between a phase of three phase mains and zero line, in second
Between relay K4 normally opened contact K4.1 and the 3rd A.C. contactor KM3 coil KM3.0 be connected in series in the one of three phase mains
Mutually between zero line；The cooler control loop includes subsidiary control loop and standby control loop, and the auxiliary controls back
First normally opened contact BT1.1 of Lu Zhong, the first oil temperature gauge, the second oil temperature gauge and winding temperature table, BT2.1, BT3.1 are connected in series
Second normally opened contact BT1.2, BT2.2 of formation auxiliary stop loop, the first oil temperature gauge, the second oil temperature gauge and winding temperature table,
BT3.2 is connected in parallel to form assistant starting loop；Time relay KT1 contact KT1.1 opens with auxiliary stop loop and auxiliary
After dynamic loop is connected in parallel, one end is connected with the one of three phase mains, coil K3.0 of the other end through the second auxiliary reclay K3
It is connected afterwards with zero line, the moving together contact FA and time relay KT1 of transformer load electric current relay coil KT1.0 are serially connected in
Between the phase and zero line of three phase mains；In the standby control loop, the first A.C. contactor KM1 normally-closed contact KM1.2
It is connected with one end after the second auxiliary reclay K4 coil K4.0 series connection with the one of three phase mains, the other end is connected with zero line；
First auxiliary reclay K3 normally opened contact K3.2 is connected in series parallel connection after the second A.C. contactor KM2 normally-closed contact KM2.2
It is connected to the normally-closed contact KM1.2 of first A.C. contactor both ends, the first oil stream indicator KF1 normally-closed contact and institute
The normally-closed contact KM1.2 for stating the first A.C. contactor is connected in parallel, the second oil stream indicator KF2 normally-closed contact and described second
The normally-closed contact KM2.2 of A.C. contactor is connected in parallel.
The standby control loop also includes alternate fault instruction loop, and the alternate fault is indicated in loop, in second
Between relay K4 normally opened contact K4.2 and the 3rd A.C. contactor normally-closed contact KM3.2, the 3rd auxiliary reclay
K5.0 coil series connection after, one end is connected with the one of three phase mains, and the other end is connected with zero line, the 3rd oil stream indicator it is normal
Closed contact KF3.1 is connected in parallel on the normally-closed contact KM3.2 both ends of the 3rd A.C. contactor KM3, the 3rd auxiliary reclay
K5.0 normally opened contact K5.1 is connected to both ends of power after being connected with malfunction indicator lamp L1.
Three phase mains gives the cooler major loop and cooling after the 4th A.C. contactor KM4 normally opened contact KM4.1
Device control loop is powered, and the main transformer cooler control loop also includes cooler full cut-off delay tripping loop, the cooler
In full cut-off delay tripping loop, very first time relay KT4 coil KT4.0 and the second time relay KT5 coil KT5.0
After parallel connection, both ends of power is connected in series in the 4th A.C. contactor KM4 normally-closed contact KM4.2, second time relay
Auxiliary contact KT5.1 is connected to both ends of power after being connected with signal relay KS coil KS.0, signal thermometer BT4's is normally opened
Contact is attempted by the auxiliary contact of second time relay after being connected with very first time relay KT4 auxiliary contact KT4.1
KT5.1 both ends, the normally opened contact KS.1, KS.2, KS.3 of the signal relay KS.0 respectively with main transformer three-phase secondary circuit
In electric current relay LJ1, LJ2, LJ3 Egress node be connected in series, the common G-T protective general export relay that starts is jumped
Main transformer high-pressure side threephase switch.
A kind of described main transformer cooler control loop, in addition to the first air switch Q1, the second air switch Q2 and
Three air switch Q3, three phase mains successively through the first air switch Q1, the first A.C. contactor KM1 normally opened contact KM1.1 after
It is connected with work cooler M1；The three phase mains normally opened contact through the second air switch Q2, the second A.C. contactor KM2 successively
It is connected after KM2.1 with auxiliary cooler M2；Three phase mains successively through the 3rd air switch Q3, the 3rd A.C. contactor KM3 it is normal
It is connected after opening contact KM3.1 with standby cooler M3；One end of first A.C. contactor KM1 coil is with three phase mains through first
One after air switch Q1 is connected, and the other end is connected with zero line；First auxiliary reclay K3 normally opened contact K3.1 and second
After A.C. contactor KM2 coil KM2.0 is connected in series, one end and three phase mains one being connected after the second air switch Q2
Connect, the other end is connected with zero line；Second auxiliary reclay K4 normally opened contact K4.1 and the 3rd A.C. contactor KM3 coil
After KM3.0 is connected in series, one end and three phase mains one being connected after the 3rd air switch Q3, the other end is connected with zero line.
A kind of described main transformer cooler control loop, in addition to the 4th air switch Q4, a phase of three phase mains is through
After four air switch Q4, powered to the subsidiary control loop and standby control loop.
The utility model has the advantages that compared with prior art：
1st, main transformer cooler control circuit of the present utility model, auxiliary cooler and failure cooler can not only be realized
Automatically engage and failover, also add the reliability in auxiliary cooler start and stop loop so that subsidiary loop can be indivedual
Automatic start and stopping are remained in the case of oil temperature gauge failure；
2nd, main transformer cooler control circuit of the present utility model, can also be in the case of cooler full cut-off, to transformer
Automatic trip is carried out, adds main transformer work reliability of operation.
Brief description of the drawings
Fig. 1 is the circuit connection diagram of main transformer cooler control loop of the present utility model；
Fig. 2 is the connection diagram in cooler full cut-off delay tripping loop.
Embodiment
, below will be to the utility model to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Technical scheme in embodiment is clearly and completely described, it is clear that described embodiment is a part of the present utility model
Embodiment, rather than whole embodiments；Based on the embodiment in the utility model, those of ordinary skill in the art are not making
Go out under the premise of creative work the every other embodiment obtained, belong to the scope of the utility model protection.
As shown in figure 1, the utility model embodiment proposes a kind of main transformer cooler control loop, including cooler master returns
Road 1 and cooler control loop, the cooler major loop are powered using 380V three-phase working power, three phase mains difference
Normally opened contact KM1.1 through the first A.C. contactor KM1 is connected with work cooler M1, through the normal of the second A.C. contactor KM2
Contact KM2.1 is opened to be connected with auxiliary cooler M2, after the 3rd A.C. contactor KM3 normally opened contact KM3.1 with standby cooling
Device M3 connections；Coil KM1.0 of one phase of three phase mains through the first A.C. contactor KM1 is connected with zero line, the first middle relay
Device K3 normally opened contact K3.1 and the second A.C. contactor KM2 coil KM2.0 is connected in series in a phase and zero for three phase mains
Between line, the second auxiliary reclay K4 normally opened contact K4.1 and the 3rd A.C. contactor KM3 coil KM3.0 are connected in series in
Between the phase and zero line of three phase mains.The work cooler, auxiliary cooler and standby cooler include oil pump and wind
Fan.
The cooler control loop is powered using 220V AC powers, and cooler control loop includes subsidiary control loop
21 and standby control loop 22, in the subsidiary control loop 21, the first oil temperature gauge, the of the second oil temperature gauge and winding temperature table
One normally opened contact BT1.1, BT2.1, BT3.1 are connected in series to form auxiliary stop loop, the first oil temperature gauge, the second oil temperature gauge and around
Second normally opened contact BT1.2 of group thermometer, BT2.2, BT3.2 are connected in parallel to form assistant starting loop；Time relay KT1
Contact KT1.1 and auxiliary stop loop and after assistant starting loop is connected in parallel, one end is connected with the one of three phase mains, separately
One end is connected after the second auxiliary reclay K3 coil K3.0 with zero line, the moving together contact FA of transformer load electric current relay
It is serially connected in time relay KT1 coil KT1.0 between a phase of three phase mains and zero line.
In the standby control loop 22, the first A.C. contactor KM1 normally-closed contact KM1.2 and the second auxiliary reclay
One end is connected with the one of three phase mains after K4 coil K4.0 series connection, and the other end is connected with zero line；First auxiliary reclay K3
Normally opened contact K3.2 be connected in series after the second A.C. contactor KM2 normally-closed contact KM2.2 and be connected in described first in parallel and hand over
Flow the normally-closed contact KM1.2 of contactor both ends, the first oil stream indicator KF1 normally-closed contact and first A.C. contactor
Normally-closed contact KM1.2 be connected in parallel, the second oil stream indicator KF2 normally-closed contact is normally closed with second A.C. contactor
Contact KM2.2 is connected in parallel.
Further, as shown in figure 1, main transformer cooler control loop of the present utility model, in addition to the first air switch
Q1, the second air switch Q2 and the 3rd air switch Q3, three phase mains is successively through the first air switch Q1, the first A.C. contactor
It is connected after KM1 normally opened contact KM1.1 with work cooler M1；Three phase mains is successively through the second air switch Q2, the second exchange
It is connected after contactor KM2 normally opened contact KM2.1 with auxiliary cooler M2；Three phase mains is successively through the 3rd air switch Q3,
It is connected after three A.C. contactor KM3 normally opened contact KM3.1 with standby cooler M3；First A.C. contactor KM1 coil
One end and three phase mains one being connected after the first air switch Q1, the other end is connected with zero line；First auxiliary reclay K3
Normally opened contact K3.1 and the second A.C. contactor KM2 coil KM2.0 be connected in series after, one end and three phase mains are empty through second
One after air cock Q2 is connected, and the other end is connected with zero line；Second auxiliary reclay K4 normally opened contact K4.1 and the 3rd is handed over
After stream contactor KM3 coil KM3.0 is connected in series, one end and three phase mains one being connected after the 3rd air switch Q3,
The other end is connected with zero line.
The course of work of main transformer cooler control loop of the present utility model is as follows：When cooler major loop connects three-phase electricity
Behind source, work cooler M1 direct plunges into power supply start-up operation, when the work for the cooler that works can not make main transformer cool,
If any one of three deblocking temperature tables detects that temperature is higher than the second higher limit, the second normally opened contact closure of corresponding temperature table,
Second auxiliary reclay K3 obtains electric locking, and control auxiliary cooler M2 the second A.C. contactor KM2 must be electrically connected, supplement heat rejecter
Device is devoted oneself to work；In addition, when if transformer load electric current reaches setting value, electric current relay moving together contact FA is also closed, the time
Relay KT1 normally opened contact KT1.1 is also closed, and obtains auxiliary reclay K3 electric, auxiliary cooler comes into operation.With auxiliary
The input of cooler, transformer temperature reduces, when the temperature value of any thermometer is less than the first higher limit, corresponding temperature table
First normally opened contact disconnects, then auxiliary reclay K3 dead electricity disconnects, and auxiliary cooler M2 is stopped；In standby control loop,
If the first A.C. contactor KM1 normally-closed contact closure, or the first oil stream indicator KF1 normally-closed contact closure, illustrate work
Make cooler dead electricity or work Cooler Fault is not devoted oneself to work；Now, the second auxiliary reclay K4 is obtained electric, and control is standby cold
But device M3 the 3rd A.C. contactor KM3 is connected, and standby cooler is devoted oneself to work, equally, if the second auxiliary reclay K3 is closed,
Now auxiliary cooler M2 should devote oneself to work, if now the second A.C. contactor KM2 normally-closed contact closure, or the second oil stream
Indicator KF2 normally-closed contact closure, illustrates standby Cooler Fault or standby cooler dead electricity, same second auxiliary reclay
K4 obtains electric, controls standby cooler M3 the 3rd A.C. contactor KM3 to connect.Therefore, the utility model can realize work, auxiliary
Help and standby cooler automatically engage and failover, in addition, after auxiliary cooler is devoted oneself to work, even if a certain temperature
The contact failure of table can not disconnect, as long as any of other 2 thermometers measure temperature when being reduced to the first higher limit, still
Auxiliary cooler can so be disconnected；When auxiliary cooler is not devoted oneself to work, if the contact failure for having a certain thermometer can not close
Close, as long as any one of other 2 thermometers measures temperature when being higher than the second higher limit, still can start supplement heat rejecter
Device.
Further, as shown in figure 1, the standby control loop 22 can also include alternate fault instruction loop 23, institute
State in alternate fault instruction loop 23, the second auxiliary reclay K4 normally opened contact K4.2 is normal with the 3rd A.C. contactor
Closed contact KM3.2, the 3rd auxiliary reclay K5.0 coil series connection after, one end is connected with the one of three phase mains, the other end with
Zero line connects, and the normally-closed contact KF3.1 of the 3rd oil stream indicator is connected in parallel on the normally-closed contact of the 3rd A.C. contactor KM3
KM3.2 both ends, the normally opened contact K5.1 of the 3rd auxiliary reclay K5 are connected to power supply two after being connected with malfunction indicator lamp L1
End.3rd auxiliary reclay K5 can be the time relay, and its delay time can be set to 0.1s ~ 30s.Then when standby cooler
After input, if relay K4 normally opened contact closure, now standby cooler M3 should devote oneself to work, if now the 3rd ac contactor
Device KM3 normally-closed contact closure, or the 3rd oil stream indicator KF3 normally-closed contact closure, after illustrating standby cooler input
Failure or standby cooler dead electricity, now the 3rd auxiliary reclay K5 obtain electric, if delay certain time still failure do not disappear, its is normal
Contact K5.1 closures are opened, malfunction indicator lamp L1 is bright, prompts standby Cooler Fault.
Further, three phase mains returns after the 4th A.C. contactor KM4 normally opened contact KM4.1 to the cooler master
Road and the power supply of cooler control loop, the main transformer cooler control loop also include cooler full cut-off as shown in Figure 2 and are delayed
Trip(ping) circuit, in the cooler full cut-off delay tripping loop, very first time relay KT4 coil KT4.0 and the second time
After relay KT5 coil KT5.0 parallel connections, power supply two is connected in series in the 4th A.C. contactor KM4 normally-closed contact KM4.2
End, the auxiliary contact KT5.1 and signal relay KS of second time relay coil KS.0 are connected to both ends of power after connecting,
Signal thermometer BT4 normally opened contact was attempted by for the second time after being connected with very first time relay KT4 auxiliary contact KT4.1
The auxiliary contact KT5.1 of relay both ends, the normally opened contact KS.1, KS.2, KS.3 of the signal relay KS.0 respectively with
The Egress node of electric current relay LJ1, LJ2, LJ3 in main transformer three-phase secondary circuit are connected in series, and the common transformer unit that starts is protected
Protect general export relay and jump main transformer high-pressure side threephase switch.Then when electric current is less than setting valve in transformer, even if cooler is complete
Stopping, transformer is also failure to actuate, if electric current is more than setting valve in transformer, LJ1, LJ2, LJ3 of electric current relay outlet section
Point is connected, once cooler full cut-off, i.e. A.C. contactor KM4 dead electricity disconnect, then very first time relay KT4 and the second time after
Electrical equipment KT5 coil obtains electric, 20 minutes closures of normally opened contact KT4.1 delays, 60 minutes closures of normally opened contact KT5.1 delays；If
After 20 minutes, signal thermometer measure to oil temperature is still not up to setting value, then signal thermometer BT4 normally opened contact is still disconnected
Open, signal relay KS keeps dead electricity, and normally opened contact KT5.1 is closed after 60 minutes, and signal relay KS obtains electric, and its is normally opened
Contact KS.1 is closed, transformer tripping operation.
Further, as shown in figure 1, main transformer cooler control loop of the present utility model, in addition to the 4th air switch
Q4, a phase of three phase mains are powered after the 4th air switch to the subsidiary control loop and standby control loop.
In the utility model, the effect of three groups of coolers is not fixed, can switch handle by setting to carry out
Switching, although above-described embodiment is that M1 therein is arranged into work cooler, another two M2 and M3 are respectively set to aid in cold
But device and standby cooler；But M1 can also be arranged to auxiliary cooler or standby cooler, M2 and M3 by switching handle
Also it is such.
Finally it should be noted that：Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (5)
1. a kind of main transformer cooler control loop, including cooler major loop and cooler control loop, it is characterised in that described
In cooler major loop, normally opened contact KM1.1 of the three phase mains respectively through the first A.C. contactor KM1 connects with work cooler M1
Connect, the normally opened contact KM2.1 through the second A.C. contactor KM2 is connected with auxiliary cooler M2, through the 3rd A.C. contactor KM3's
It is connected after normally opened contact KM3.1 with standby cooler M3；Coil of one phase of three phase mains through the first A.C. contactor KM1
KM1.0 is connected with zero line, the first auxiliary reclay K3 normally opened contact K3.1 and the second A.C. contactor KM2 coil KM2.0
It is connected in series between a phase of three phase mains and zero line, the second auxiliary reclay K4 normally opened contact K4.1 exchanges with the 3rd to be connect
Tentaculum KM3 coil KM3.0 is connected in series between a phase of three phase mains and zero line；
The cooler control loop includes subsidiary control loop and standby control loop, in the subsidiary control loop, first
First normally opened contact BT1.1, BT2.1, BT3.1 of oil temperature gauge, the second oil temperature gauge and winding temperature table is connected in series to form auxiliary
Second normally opened contact BT1.2, BT2.2, BT3.2 of stop loop, the first oil temperature gauge, the second oil temperature gauge and winding temperature table is in parallel
Connection forms assistant starting loop；Time relay KT1 contact KT1.1 is in parallel with auxiliary stop loop and assistant starting loop
After connection, one end is connected with the one of three phase mains, and the other end connects after the second auxiliary reclay K3 coil K3.0 with zero line
Connect, the moving together contact FA and time relay KT1 of transformer load electric current relay coil KT1.0 are serially connected in three phase mains
Between one phase and zero line；
In the standby control loop, the first A.C. contactor KM1 normally-closed contact KM1.2 and the second auxiliary reclay K4 line
One end is connected with the one of three phase mains after circle K4.0 series connection, and the other end is connected with zero line；First auxiliary reclay K3's is normally opened
Contact K3.2 is connected in first ac contactor in parallel after being connected in series the second A.C. contactor KM2 normally-closed contact KM2.2
The normally-closed contact KM1.2 of device both ends, the first oil stream indicator KF1 normally-closed contact are normally closed with first A.C. contactor
Contact KM1.2 is connected in parallel, the second oil stream indicator KF2 normally-closed contact and the normally-closed contact of second A.C. contactor
KM2.2 is connected in parallel.
2. a kind of main transformer cooler control loop according to claim 1, it is characterised in that the standby control loop is also
Indicate loop including alternate fault, in alternate fault instruction loop, the second auxiliary reclay K4 normally opened contact K4.2 with
After the normally-closed contact KM3.2, the 3rd auxiliary reclay K5.0 of 3rd A.C. contactor coil series connection, one end and three-phase electricity
The one of source is connected, and the other end is connected with zero line, and the normally-closed contact KF3.1 of the 3rd oil stream indicator is connected in parallel on the 3rd exchange
Contactor KM3 normally-closed contact KM3.2 both ends, the normally opened contact K5.1 and malfunction indicator lamp of the 3rd auxiliary reclay K5.0
Both ends of power is connected to after L1 series connection.
3. a kind of main transformer cooler control loop according to claim 1, it is characterised in that three phase mains is through the 4th exchange
Powered after contactor KM4 normally opened contact KM4.1 to the cooler major loop and cooler control loop, the main transformer cooling
Device control loop also includes cooler full cut-off delay tripping loop, in the cooler full cut-off delay tripping loop, the very first time
After relay KT4 coil KT4.0 is in parallel with the second time relay KT5 coil KT5.0, with the 4th A.C. contactor KM4
Normally-closed contact KM4.2 be connected in series in both ends of power, the auxiliary contact KT5.1 and signal relay KS of second time relay
Coil KS.0 series connection after be connected to both ends of power, signal thermometer BT4 normally opened contact is auxiliary with very first time relay KT4's
Contact KT4.1 is helped to be attempted by the auxiliary contact KT5.1 of second time relay both ends after connecting, signal relay KS.0's is normal
Open contact KS.1, KS.2, the KS.3 Egress node with electric current relay LJ1, LJ2, LJ3 in main transformer three-phase secondary circuit respectively
It is connected in series, the common G-T protective general export relay that starts jumps main transformer high-pressure side threephase switch.
4. a kind of main transformer cooler control loop according to claim 1, it is characterised in that also including the first air switch
Q1, the second air switch Q2 and the 3rd air switch Q3, three phase mains is successively through the first air switch Q1, the first A.C. contactor
It is connected after KM1 normally opened contact KM1.1 with work cooler M1；Three phase mains is successively through the second air switch Q2, the second exchange
It is connected after contactor KM2 normally opened contact KM2.1 with auxiliary cooler M2；Three phase mains is successively through the 3rd air switch Q3,
It is connected after three A.C. contactor KM3 normally opened contact KM3.1 with standby cooler M3；First A.C. contactor KM1 coil
One end and three phase mains one being connected after the first air switch Q1, the other end is connected with zero line；First auxiliary reclay K3
Normally opened contact K3.1 and the second A.C. contactor KM2 coil KM2.0 be connected in series after, one end and three phase mains are empty through second
One after air cock Q2 is connected, and the other end is connected with zero line；Second auxiliary reclay K4 normally opened contact K4.1 and the 3rd is handed over
After stream contactor KM3 coil KM3.0 is connected in series, one end and three phase mains one being connected after the 3rd air switch Q3,
The other end is connected with zero line.
5. a kind of main transformer cooler control loop according to claim 1, it is characterised in that also including the 4th air switch
Q4, a phase of three phase mains are powered after the 4th air switch Q4 to the subsidiary control loop and standby control loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720627711.0U CN206930969U (en) | 2017-06-01 | 2017-06-01 | A kind of main transformer cooler control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720627711.0U CN206930969U (en) | 2017-06-01 | 2017-06-01 | A kind of main transformer cooler control loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206930969U true CN206930969U (en) | 2018-01-26 |
Family
ID=61345958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720627711.0U Expired - Fee Related CN206930969U (en) | 2017-06-01 | 2017-06-01 | A kind of main transformer cooler control loop |
Country Status (1)
| Country | Link |
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| CN (1) | CN206930969U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706892A (en) * | 2019-10-10 | 2020-01-17 | 国网黑龙江省电力有限公司电力科学研究院 | Transformer cooling system capable of realizing state self-holding function |
-
2017
- 2017-06-01 CN CN201720627711.0U patent/CN206930969U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706892A (en) * | 2019-10-10 | 2020-01-17 | 国网黑龙江省电力有限公司电力科学研究院 | Transformer cooling system capable of realizing state self-holding function |
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