CN205297994U - Power failure way is opened in automation of external fan of transformer - Google Patents
Power failure way is opened in automation of external fan of transformer Download PDFInfo
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- CN205297994U CN205297994U CN201520995484.8U CN201520995484U CN205297994U CN 205297994 U CN205297994 U CN 205297994U CN 201520995484 U CN201520995484 U CN 201520995484U CN 205297994 U CN205297994 U CN 205297994U
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- 239000003054 catalyst Substances 0.000 claims description 26
- 238000001816 cooling Methods 0.000 abstract description 11
- 238000004804 winding Methods 0.000 abstract 1
- 239000013589 supplement Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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Abstract
The utility model relates to a power failure way is opened in automation of external fan of transformer, including major loop and control circuit, in the major loop, three -phase alternating current links to each other with external fan behind the main contact of contactor through the fuse, among the control circuit, power input end in proper order with fuse, control switch module be connected with the power output end behind the winding connection of contactor, the automatic control switch module includes the auxiliary contact of stop switch, starting switch and contactor, and the auxiliary contact of stop switch and contactor establishes ties, stop switch and starting switch are temperature control's normally open switch, and stop switch and starting switch's control end is related with transformer temperature control meter. The utility model discloses an it is related with transformer oil temperature, can stop according to automatic the opening of the external fan of transformer temperature real time control, realize transformer automatically cooling function, when needing auxiliary cooling moreover, can in time close down the fan, reduce station power consumption consumption.
Description
Technical field
This utility model relates to field transformer, is specifically related to the automatic start-stop circuit of a kind of transformator external fan.
Background technology
Transformator is owing in use can produce very big heat, need equipped with chiller, existing 35kv transformator many employings oil mode cools down, but for summer hot continuous high temperature, the state of high load capacity, this type of cooling is often difficult to meet the cooling needs of transformator, therefore, current 35kV transformer station is many carries out cooling auxiliary equipped with external fan to transformator, and cooling effect is notable.
As shown in Figure 1, for in prior art, traditional external fan mode of connection, three-phase alternating current flows out through A, B, C terminal, powers to external fan after fuse FU1, switch K, wherein, the mistake of FU1 control circuit flows fusing, and switch K controls the start and stop of blower fan, by as can be seen from Figure 1, traditional external fan circuit connecting method can only adopt manual start and stop, which results in two defects: cannot start external fan in time when transformator is carried out supplement heat rejecter by needs; When temperature be reduced to do not need supplement heat rejecter time, blower fan can not autostop, cause transforming plant consume excessive.
Utility model content
This utility model overcomes the deficiency that prior art exists, it is provided that a kind of external fan automatic start-stop circuit that can realize automatic start-stop function.
In order to solve above-mentioned technical problem, the technical solution adopted in the utility model is: the automatic start-stop circuit of a kind of transformator external fan, it is characterized in that, including major loop and control loop, in described major loop, three-phase alternating current is connected with external fan after the first fuse, the main contact of catalyst; In described control loop, power input successively with the second fuse, temp control switch module, described catalyst coil be connected after be connected with power output end; Described temp control switch module includes the auxiliary contact of shutdown switch, starting switch and described catalyst, the auxiliary contact series connection of described shutdown switch and described catalyst;Described shutdown switch and described starting switch are temperature controlled normal open switch, and described shutdown switch controls meter with the control end of described starting switch with transformer temperature and associates.
In described control switch module, described starting switch is connected in parallel on the auxiliary contact two ends of described catalyst KM.
In described temp control switch module, described starting switch is connected in parallel on the circuit two ends that the auxiliary contact series connection of described shutdown switch and described catalyst is formed.
The closed temperature of described shutdown switch is set as that the closed temperature of the temperature return value n of transformator, described starting switch K2 is set as the desired temperature m of transformator, and described desired temperature m is more than temperature return value n.
The automatic start-stop circuit of described a kind of transformator external fan, also include permutator and hand switch, the moved end of described permutator is connected with the leading-out terminal of the second fuse, the fixing end of the first of described permutator is connected with the end of incoming cables of described temp control switch module, second fixing end is connected with the end of incoming cables of described hand switch, and the leading-out terminal of described hand switch K3 is connected with the leading-out terminal of described temperature control modules.
The automatic start-stop circuit of described a kind of transformator external fan, also includes thermorelay FR, and the heater element of described thermorelay FR is connected in described major loop, and the normally closed interlock of described thermorelay FR is connected in the main circuit in described control loop.
This utility model compared with prior art has the advantages that
1, associated with temperature of oil in transformer by control loop, it is possible to control the start and stop of external fan in real time according to temperature of oil in transformer, it is achieved transformator automatic cooling function;
2, without manual operation, it is achieved automatization;
3, external fan need not be automatically turned off during supplement heat rejecter, transformation station electric consumption is reduced.
Accompanying drawing explanation
Fig. 1 is the mode of connection of external fan in prior art;
Fig. 2 is the first embodiment of the automatic start-stop circuit of a kind of transformator external fan of the present utility model;
Fig. 3 is the second embodiment of the automatic start-stop circuit of a kind of transformator external fan of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described further.
As in figure 2 it is shown, first embodiment of the present utility model, it may be assumed that the automatic start-stop circuit of a kind of transformator external fan, including major loop and control loop, in major loop, the three-phase alternating current flowed out from terminals A, B, C is connected with external fan M after fuse FU1, the main contact of catalyst KM; Control in loop, terminals A sequentially passes through fuse FU2, shutdown switch K1, the auxiliary contact of catalyst KM, catalyst KM coil QM after be connected with terminals B, starting switch K2 is connected in the both sides of circuit that the auxiliary contact series connection of shutdown switch K1 and catalyst KM is formed in parallel.
Wherein, shutdown switch K1 and starting switch K2 is temperature controlled normal open switch, and namely when temperature is higher than when setting closed temperature, they are Guan Bi under the effect controlling end, otherwise, is off-state always. The control end of shutdown switch K1 and starting switch K2 controls meter with transformer temperature and associates, and the closed temperature of shutdown switch K1 is set as the temperature return value n of transformator, and the closed temperature of starting switch K2 is set as the desired temperature m of transformator. Wherein, the implication of desired temperature m is: when the temperature of transformator raises more than m, external fan should be started working with supplement heat rejecter transformator, in order to avoid transformer temperature is too high, the implication of temperature return value n is: when the temperature that the supplement heat rejecter of external fan makes transformator drops below n, external fan should quit work, and system can stop supplement heat rejecter to save the energy.
Wherein, the model of catalyst KM can be CJ16B-63.
Additionally, the automatic start-stop circuit of a kind of transformator external fan of the present embodiment also includes thermorelay FR, between the main contact and the blower fan that are arranged in major loop catalyst KM, for major loop is carried out overtemperature protection.
As shown in Figure 3, for the second embodiment of the present utility model, that is: the automatic start-stop circuit of a kind of transformator external fan, including major loop and control loop, in major loop, the three-phase alternating current flowed out from three-phase alternating current terminals A, B, C is connected with external fan M after fuse FU1, the main contact of catalyst KM; Control in loop, including fuse FU2, permutator K4, shutdown switch K1, the auxiliary contact of catalyst KM, the coil QM of catalyst KM, hand switch K3, the moved end of permutator K4 is connected with the leading-out terminal of fuse FU2, the fixing end 2 of permutator K4 is connected with the end of incoming cables of shutdown switch K1, and fixing end 1 is connected with the end of incoming cables of hand switch K3, and the leading-out terminal of hand switch K3 is connected with the end of incoming cables of the coil QM of catalyst KM. Electric current sequentially passes through fuse FU2, shutdown switch K1 after being inputted by terminals A, the auxiliary contact of catalyst KM, catalyst KM coil QM after be connected with terminals B, wherein, starting switch K2 is connected in the both sides of the auxiliary contact of catalyst KM in parallel.
Identical with first embodiment, shutdown switch K1 and starting switch K2 is temperature controlled normal open switch, and namely when temperature is higher than respective setting closed temperature, they are Guan Bi under the effect controlling end, otherwise, is off-state always. The control end of shutdown switch K1 and starting switch K2 controls meter with transformer temperature and associates, and the closed temperature of shutdown switch K1 is set to be set as the temperature return value n of transformator, and the closed temperature of starting switch K2 is set as the desired temperature m of transformator. Wherein, the implication of desired temperature m is: when the temperature of transformator raises more than m, external fan should be started working with supplement heat rejecter transformator, in order to avoid transformer temperature is too high, the implication of temperature return value n is: when the temperature that the supplement heat rejecter of external fan makes transformator drops below n, external fan should quit work, and system can stop supplement heat rejecter to save the energy.
In addition; the automatic start-stop circuit of a kind of transformator external fan of the present embodiment also includes thermorelay FR; its model can be TGR36-45; the heater element of thermorelay is connected in major loop between catalyst KM and blower fan; normally closed interlock is connected in the main road controlling loop, for external fan is carried out overtemperature protection.
In addition; the automatic start-stop circuit of a kind of transformator external fan of the present embodiment also includes air switch K; its model can be DZ47-63, and air switch is connected in the circuit that three-phase alternating current enters before major loop, for automatic start-stop circuit was carried out stream, overload protection.
When the moved end of permutator K4 is connected with fixing end 1, external fan system enters manual start and stop state, Guan Bi or open hand switch K3 and can control the start and stop of external fan. When the moved end of permutator K4 is connected with fixing end 2, external fan system enters automatic start-stop state, and the work process of its automatic start-stop is as follows:
(1) transformator is started working, and temperature is relatively low, and shutdown switch K1 and starting switch K2 all disconnects, and external fan does not work;
(2) along with the working time is elongated, transformer temperature gradually rises to more than temperature return value n, and the control end associated with transformer temperature controller makes shutdown switch K1 close, and starting switch K2 remains open;
(3) transformer temperature continues to rise, and when reaching desired temperature m, starting switch K2 closes, now, the coil QM of relay K M is charged, its main contact and the equal adhesive of auxiliary contact, and control circuit forms self-locking, main circuit is connected, and external fan starts, and supplement heat rejecter starts.
(4) transformer temperature begins to decline, and when temperature is down between m and n, starting switch K2 disconnects, but owing to relay K M is in self-locking state, external fan will not stop cooling.
(5) when temperature continues to drop below n, shutdown switch K1 disconnects, the coil QM dead electricity of relay K M, and major loop disconnects, and blower fan stops cooling.
(6) if transformer temperature continues to rise, then the work process of the cooling automatically of next round is started.
Owing to being provided with permutator, therefore the present embodiment can also realize automatically controlling the conversion with Non-follow control, namely when needed, even if temperature falls below return below the temperature value n of setting, it is also possible to manually control transformator is further cooled down.
Therefore, the automatic start-stop circuit of a kind of transformator external fan of the present utility model, by associating with temperature of oil in transformer, can according to transformer temperature real-time implementation external fan automatic start-stop, realize transformator automatic cooling function, and without manual operation, it is achieved blower fan start and stop function full automation; Further, when not needing supplement heat rejecter, it is possible to close down blower fan in time, station electric consumption is reduced.
Above in conjunction with accompanying drawing, embodiment of the present utility model is explained in detail, but this utility model is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, it is also possible to make various change under the premise without departing from this utility model objective.
Claims (6)
1. the automatic start-stop circuit of a transformator external fan, it is characterised in that including major loop and control loop, in described major loop, three-phase alternating current is connected with external fan after the first fuse, the main contact of catalyst;
In described control loop, power input successively with the second fuse, temp control switch module, described catalyst coil be connected after be connected with power output end;
Described temp control switch module includes the auxiliary contact of shutdown switch, starting switch and described catalyst, the auxiliary contact series connection of described shutdown switch and described catalyst; Described shutdown switch and described starting switch are temperature controlled normal open switch, and described shutdown switch controls meter with the control end of described starting switch with transformer temperature and associates.
2. the automatic start-stop circuit of a kind of transformator external fan according to claim 1, it is characterised in that in described control switch module, described starting switch is connected in parallel on the auxiliary contact two ends of described catalyst KM.
3. the automatic start-stop circuit of a kind of transformator external fan according to claim 1, it is characterized in that, in described temp control switch module, described starting switch is connected in parallel on the circuit two ends that the auxiliary contact series connection of described shutdown switch and described catalyst is formed.
4. the automatic start-stop circuit of a kind of transformator external fan according to claim 1, it is characterized in that, the closed temperature of described shutdown switch is set as the temperature return value n of transformator, the closed temperature of described starting switch K2 is set as the desired temperature m of transformator, and described desired temperature m is more than temperature return value n.
5. the automatic start-stop circuit of a kind of transformator external fan according to claim 1, it is characterized in that, also include permutator and hand switch, the moved end of described permutator is connected with the leading-out terminal of the second fuse, the fixing end of the first of described permutator is connected with the end of incoming cables of described temp control switch module, second fixing end is connected with the end of incoming cables of described hand switch, and the leading-out terminal of described hand switch K3 is connected with the leading-out terminal of described temperature control modules.
6. the automatic start-stop circuit of a kind of transformator external fan according to claim 1, it is characterized in that, also including thermorelay FR, the heater element of described thermorelay FR is connected in described major loop, and the normally closed interlock of described thermorelay FR is connected in the main circuit in described control loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995484.8U CN205297994U (en) | 2015-12-07 | 2015-12-07 | Power failure way is opened in automation of external fan of transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995484.8U CN205297994U (en) | 2015-12-07 | 2015-12-07 | Power failure way is opened in automation of external fan of transformer |
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| CN205297994U true CN205297994U (en) | 2016-06-08 |
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| CN201520995484.8U Active CN205297994U (en) | 2015-12-07 | 2015-12-07 | Power failure way is opened in automation of external fan of transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351235A (en) * | 2015-12-07 | 2016-02-24 | 国网山西省电力公司运城供电公司 | Automatic starting and stopping circuit of external draught fan of transformer |
| CN112117142A (en) * | 2020-10-19 | 2020-12-22 | 国网山东省电力公司威海供电公司 | Quick belt cleaning device of transformer oil arc extinguishing on-load tap-changer contact mechanism |
-
2015
- 2015-12-07 CN CN201520995484.8U patent/CN205297994U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351235A (en) * | 2015-12-07 | 2016-02-24 | 国网山西省电力公司运城供电公司 | Automatic starting and stopping circuit of external draught fan of transformer |
| CN112117142A (en) * | 2020-10-19 | 2020-12-22 | 国网山东省电力公司威海供电公司 | Quick belt cleaning device of transformer oil arc extinguishing on-load tap-changer contact mechanism |
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