CN201556506U - Natural circulation air-cooling control module for large transformer - Google Patents
Natural circulation air-cooling control module for large transformer Download PDFInfo
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- CN201556506U CN201556506U CN2009202970257U CN200920297025U CN201556506U CN 201556506 U CN201556506 U CN 201556506U CN 2009202970257 U CN2009202970257 U CN 2009202970257U CN 200920297025 U CN200920297025 U CN 200920297025U CN 201556506 U CN201556506 U CN 201556506U
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Abstract
The utility model relates to a natural circulation air-cooling control module for a large transformer, which is applied to a modular air-cooling control device. The natural circulation air-cooling control module for the large transformer comprises an active-standby switching unit for a power supply, an output power supply control and protection unit, a signal state indicating unit, and a signal uploading unit, wherein the active-standby switching unit for the power supply is used for providing working power supply and output state signals, the output power supply control and protection unit is used for outputting power supply control and overcurrent, short-circuit and open-phase protection, the signal state indication unit indicates the working state, and the signal uploading unit uploads the output power supply control, protects the working state and is connected with an external signal monitoring system. The module adopts a thermorelay and an adjustable rated current air switch, thereby improving the accuracy of overcurrent, short-circuit and open-phase protection on a fan motor; an intermediate relay is adopted for overcurrent, short-circuit and open-phase locking protection, thereby preventing the phenomena of degradation failures such as motor coil burning, and the like from occurring; and the module has all of the functions of an air-cooling module, can be matched with an original signal module and adopts conventional components and a pluggable external terminal, thereby being beneficial to eliminating the defects timely, fast and safely by maintenance personnel and guaranteeing the normal running of the transformer.
Description
Technical field
The utility model relates to a kind of high-power transformer natural circulation wind cooling controller, is specifically related to the air-cooled control module of a kind of high-power transformer natural circulation.
Background technology
The natural circulation wind cooling controller is the novel type of cooling of high-power transformer; self cooling circulation is not lowered the temperature by numerous radiator fins when transformer has excess temperature, overcurrent; automatically drop into the fan electromotor auxiliary heat dissipation of radiator fin bottom when transformer upper strata oil temperature during too high or protection overcurrent, do not have the control signal output of " air-cooled full cut-off " excision transformer operation.Existing modular wind cooling controller is accomplished a casing to public power supply main standby switch unit, signal monitoring unit, cyclelog unit, signal condition indication and uploading unit, is called signaling module; Power supply main standby switch unit, cyclelog unit, out-put supply control and protected location, signal condition indication and uploading unit are accomplished another casing, be called air-cooled control module.
Shortcoming is: in service, and adopt the failure rate of the more traditional natural air cooled control device Transformer Forced-Air Cooling System of modular wind cooling controller to exceed many times.Find through careful the investigation: the failure rate of signaling module is very low, and the overwhelming majority is the fault of air-cooled control module.Reason is air-cooled control module out-put supply control and protected location, adopt contactless high power solid state relay and current transducer to form the out-put supply control and the protected location circuit of fan electromotor, the characteristic that solid-state relay has that current-carrying must generate heat, radiator heat-dissipation weak effect, excess temperature must damage often causes the output of phase shortage power supply; The current limliting of current transducer current foldback circuit is regulated resistance, just occurs the cut-off current drift when variation of ambient temperature, therefore can not correctly implement overcurrent, open-phase protection, causes institute's control fan electromotor group cisco unity malfunction even burns.The fault-signal of this air-cooled control module is in fact driven into row control overcurrent protection, trips and is reported this wind control module " fault " signal by the fan electromotor sky; report " fault " though signal is stable; but the overcurrent protection to fan electromotor is accurate inadequately, is the another reason that causes defective.In addition, during air-cooled control module maintain and replace, need do multinomial safety measure, external cabling rotary extrusion type spinning terminal disassemble trouble, time-consuming.So, develop a kind of less trouble, to be convenient to the air-cooled control module of high-power transformer natural circulation keeping in repair, change very necessary.
Summary of the invention
The technical problems to be solved in the utility model is the technical deficiency that is in operation and exists at the control module that has the natural circulation wind cooling controller now; providing a kind of can cooperate with original signaling module; and can reliably carry out overcurrent, short circuit, power supply open-phase protection to fan electromotor, the air-cooled control module of high-power transformer natural circulation that correct index signal and signal are uploaded.
The technical scheme that the utility model technical solution problem is adopted is:
The air-cooled control module of this high-power transformer natural circulation, it comprises:
Out-put supply control and protected location, be used for out-put supply control and overcurrent, short circuit, power supply open-phase protection status signal, input termination power supply main standby switch unit, the output connection outreaches fan electromotor provides power supply for it, connects signal uploading unit and signal condition indicating member;
The signal condition indicating member is indicated the operating state of described air-cooled control module, and input connects power supply main standby switch unit and out-put supply control and protected location;
The signal uploading unit is used to upload out-put supply control and protected location operating state, connects the signaling module that outreaches the signal monitoring system;
Above-mentioned power supply main standby switch unit, out-put supply control and protected location, signal condition indicating member and signal uploading unit are installed in the modular tank.
Described power supply main standby switch unit comprises that the interchange incoming power sky of duplicate supply opens Q I, Q II, phase sequence relay 1DX, 2DX, A.C. contactor KM1, KM2 and fuse RD1, RD2; This unit divides main circuit and control circuit:
Main circuit: two-way exchanges incoming power I and II～380V, connects interchange incoming power sky respectively and opens QI, Q II and A.C. contactor KM1 and KM2, output U3, V3, W3 after the output branch is in parallel;
Control circuit: two-way exchanges U11, the U21 after the incoming power sky is opened protection; serial connection exchanges incoming power fuse RD1, RD2 respectively; A.C. contactor KM2, KM1 normally closed contact; phase sequence relay 1DX, 2DX normally closed contact; and behind the actuation coil of A.C. contactor KM1, KM2, connect W11, the W21 formation control loop that exchanges after the incoming power sky is opened protection respectively.
Control of described out-put supply and protected location comprise that function diverter switch SA, fan electromotor A.C. contactor KM, thermal relay FRJ1, FRJ2, grouping fan electromotor sky open protection QF1, QF2, QF3, QF4 and intermediate relay ZJ;
The main circuit of this unit connects: described fan electromotor A.C. contactor KM inlet wire position meets described power supply main standby switch unit output contact U3, V3, W3, the outlet position also meets thermal relay FRJ1, FRJ2, the latter two by the plug-in terminal respectively and connect and outreach grouping fan electromotor sky and open protection QF1, QF2 and QF3, QF4, and corresponding connection outreaches fan electromotor MF1, MF2 and MF3, MF4;
Control circuit: the signaling module that this air-cooled control module outreaches the signal monitoring system inserts the output control signal by the plug-in terminal, N phase power supply MK after conversion is connected to 1,5 contacts of function diverter switch SA, energized U3 behind contact 6 serial connection fan electromotor A.C. contactor KM actuation coils, intermediate relay ZJ normally closed contact, thermal relay FRJ2, FRJ1 normally closed contact and the fuse RD3 of function diverter switch SA;
Protective circuit connects: behind the actuation coil of serial connection intermediate relay ZJ; the normally closed contact of its main road serial connection fan electromotor A.C. contactor KM; and connecing thermal relay FRJ1, FRJ2 normal opened contact, it connects the intermediate relay ZJ normal opened contact along separate routes, leads, meets U3 along separate routes and after meeting fuse RD3.
Described signal condition indicating member comprises the normally opened contact of A.C. contactor KM1, KM2, and intermediate relay ZJ is often opened, normally-closed contact and red, green LED; The normal opened contact serial connection green LED of A.C. contactor KM1 is indicated air-cooled control module " power supply I work "; A.C. contactor KM2 normal opened contact serial connection green LED is indicated air-cooled control module " power supply II work "; Intermediate relay ZJ normal opened contact serial connection red light emitting diodes is indicated air-cooled control module " cooler fault "; The normally closed contact string green LED of intermediate relay ZJ is indicated air-cooled control module " cooler is normal "; Four and connect the back and insert signal condition indication power supply.
Described signal uploading unit comprises 7,8 contacts of intermediate relay ZJ normal opened contact and function diverter switch SA, and the two external plug-in terminal in two ends, series connection back inserts signaling module X23, the X24 that outreaches the signal monitoring system.
This air-cooled control module is compared with prior art has following beneficial effect:
After this air-cooled control module adopts A.C. contactor to carry out out-put supply control, because A.C. contactor three links, phase shortage output can not appear; Open and be replaced by adjustable type rated current sky and open because of adopting thermal relay and will outreaching fan electromotor definite value rated current sky, improved the precision of overcurrent to fan electromotor, short circuit, open-phase protection; There is auxiliary relay to carry out overcurrent, short circuit, open-phase protection locking, avoided the phenomenon of degradation failure degree such as motor coil burns to take place; This air-cooled control module is owing to have every function of air-cooled control module, so can satisfy the cooperation with original signaling module; Adopt conventional wind cooling controller components and parts and plug-in external connection terminal, help the normal operation of timely, quick, safe elimination defective of attendant and guarantee transformer.
Description of drawings
Fig. 1 is a high-power transformer natural circulation wind cooling controller work schematic diagram;
Fig. 2 is a power supply main standby switch unit circuit diagram;
Fig. 3 is air-cooled control module function commutation circuit figure;
Fig. 4 is out-put supply control and protected location circuit diagram;
Fig. 5 is a signal condition indicating member circuit diagram;
Fig. 6 is a signal uploading unit circuit diagram.
Embodiment
Further introduce embodiment of the present utility model below in conjunction with accompanying drawing.
As shown in Figure 1, whether the signaling module of this high-power transformer natural circulation wind cooling controller moves according to transformer is selected air-cooled self-starting " throwing ", " moving back " position of the switch, could realize that each air-cooled control module " manually " is thrown, wind cutting fan group of motors for air-cooled control module control provides working power N phase.Transformer upper strata oil temperature gauge and protection equipment for transformer provide excess temperature, over-current signal to the cyclelog of signaling module; after set point is compared; send control signal and give each air-cooled control module, realize that each air-cooled control module " automatically " is thrown, wind cutting fan group of motors.The power supply main standby switch unit of air-cooled control module is for out-put supply control and protected location provide the reliably working power supply; Out-put supply control and protected location, opening for grouping fan electromotor sky provides power supply and protects; Grouping fan electromotor sky is opened protection and again power supply is decomposed each fan electromotor and accurately protection, and the fan electromotor startup is the transformer auxiliary temperature-reducing.When air-cooled control module was worked, this module by signal state indicating member carried out the state indication; During the fan electromotor fault, the signal uploading unit uploads to signaling module with " fault " signal.Signaling module compiles all signals again and uploads to supervisory control of substation backstage microcomputer, is convenient to the operating state that the operations staff understands transformer module formula wind cooling controller, in time finds handling failure.
Shown in Figure 2, this air-cooled control module power supply main standby switch unit is made up of main circuit and control circuit.Main circuit: have I～380V to exchange incoming power with II～380V two-way; from external plug-in terminal U1; V1; W1; N1 and U2; V2; W2; N2 enters and is connected to the I section behind the air-cooled control module casing respectively and exchanges the incoming power sky and open protection Q I; the II section exchanges the inlet wire position that the incoming power sky is opened protection Q II; the I section exchanges the incoming power sky and opens protection Q I; the outlet position that II section interchange incoming power sky is opened protection Q II is connected to power supply main standby switching A.C. contactor KM1 respectively; power supply main standby switches the inlet wire position of A.C. contactor KM2, and power supply main standby switches A.C. contactor KM1; output U3 after the outlet position branch of KM2 is in parallel; V3; W3 is as this air-cooled control module reliably working power supply.The position of power supply main standby control switching circuit: be connected to U1, V1, W1, N1 and I section respectively and exchange the incoming power sky and open protection Q I and U2, V2, W2, N2 and II section and exchange the incoming power sky and open between the protection Q II.Exchange incoming power voltage by the I section earlier; phase shortage monitors that phase sequence relay 1DX exchanges incoming power voltage with the II section; phase shortage monitors that phase sequence relay 2DX exchanges incoming power voltage to two-way respectively; the phase shortage monitoring; main power supply switches the main power supply control switching circuit of A.C. contactor KM1 (KM2): the A phase U11 (U21) that this section interchange incoming power sky is opened after the protection connects I section interchange incoming power voltage earlier; phase shortage monitors the normally closed contact of phase sequence relay 1DX (2DX); again behind the normally closed contact of the active and standby switching A.C. contactor in crosstalk source KM2 (KM1); connect the actuation coil that power supply main standby switches A.C. contactor KM1 (KM2); be connected to C phase W11 (W21) the formation action circuit after this section interchange incoming power sky is opened protection at last; because main power supply switches A.C. contactor KM1; the actuation coil of KM2 is gone here and there the other side's normally closed contact mutually; be connected in series the I section separately and exchange incoming power voltage; phase shortage monitors phase sequence relay 1DX; the II section exchanges incoming power voltage; phase shortage monitors the normally closed contact of phase sequence relay 2DX, so the working power after guaranteeing to switch is reliable.Insurance RD1, RD2 are serially connected with the control circuit of respectively autotomying, and can protect when contactor coil burns when being short-circuited.
Shown in Figure 3; air-cooled control module function commutation circuit is the part of out-put supply control and protected location, and the control signal that the control signal work that it outreaches N phase power supply MK after the control signal conversion of signaling module output, signaling module output starts MG, signaling module output starts MZ automatically.Air-cooled control module function commutation circuit: public power N phase, after the three side switching circuit relay J 1 in signaling module, numbering is by changing MK into, and MK is again and connect 1,5 contacts of this air-cooled control module function diverter switch SA.When selecting " manually ", 5,6 contacts of function diverter switch SA are logical, 6 contacts are connected this air-cooled control module reliably working power supply A phase U3 after being connected in series the out-put supply control of this air-cooled control module and protective circuit, simultaneously 6 contacts also and the output control signal work that connects this air-cooled control module external terminal signaling module start MG; When three side switching circuit relay J, the 1 contact conducting in the signaling module, throwing provides working power with the air-cooled control module of basis of " manually " position to this group fan electromotor.When selecting " automatically ", 5,6 contacts of function diverter switch SA disconnect, 1,2 contacts are logical, the control signal of the air-cooled control module external terminal of 2 contact strings signaling module output starts MZ automatically, after MZ passes through the interior excess temperature of signaling module, overcurrent self-starting relay J 2 contacts, the control signal work that is connected to this air-cooled control module external terminal signaling module output starts MG, MG and connect the out-put supply control and protective circuit of this air-cooled control module after, this air-cooled control module reliably working power supply A phase U3 is connected in string insurance RD3 protection again; When three side switching circuit relay J 1 in the signaling module, excess temperature, 2 contact conductings of overcurrent self-starting relay J in the signaling module, the wind sky module of throwing with " automatically " position provides working power to this group fan electromotor.
Shown in Figure 4, this air-cooled control module out-put supply control and protected location are by function diverter switch SA, fan electromotor working power control A.C. contactor KM, thermal relay FRJ1, FRJ2, intermediate relay ZJ and outreach that grouping fan electromotor sky is opened protection QF1, QF2, QF3, QF4 form.The main circuit position connects: the inlet wire position of fan electromotor working power control A.C. contactor KM meets U3; V3; W3; the outlet position of A.C. contactor KM also connects the inlet wire position of thermal relay FRJ1 (FRJ2); the outlet position of thermal relay FRJ1 (FRJ2) by external plug-in terminal and connect outreach the fan electromotor sky that respectively divides into groups open the protection QF1; QF2 (QF3; QF4) inlet wire position; grouping fan electromotor sky is opened protection QF1; QF2 (QF3; QF4) outlet position correspondence connects and outreaches fan electromotor MF1; MF2 (MF3; MF4), the fan electromotor acquisition power supply that this air-cooled control module is controlled carries out work.The control circuit position connects: the N phase power supply MK after this air-cooled control module is changed by the control signal of external plug-in terminal access signaling module output, MK is connected to 1,5 contacts of function diverter switch SA.When selecting " manually ", 5,6 contacts of function diverter switch SA are logical, this air-cooled control module reliably working power supply A phase U3 of connection behind the normally closed contact of 6 contacts (the 6 contacts control signal work that also connects signaling module output simultaneously starts MG, is used for realizing " automatically " function) actuation coil of string fan electromotor working power control A.C. contactor KM, the normally closed contact of intermediate relay ZJ, FRJ2, the normally closed contact of FRJ1, the insurance RD3; The protective circuit position connects: behind the actuation coil of string intermediate relay ZJ; the normally closed contact of main road string fan electromotor working power control earlier A.C. contactor KM; go here and there normal opened contact after thermal relay FRJ1, the parallel connection of FRJ2 auxiliary signal again; the normal opened contact of shunt and intermediate relay ZJ is then with this air-cooled control module reliably working power supply A phase U3 of connection behind the string insurance RD3.When three side switching circuit relay J, 1 contact in the signaling module was connected, throwing provided working power and protection with the air-cooled control module of " manually " position to this group fan electromotor.When selecting " automatically "; 5 of function diverter switch SA; 6 contacts disconnect; 1; 2 contact conductings; N phase power supply MK after the control signal conversion of signaling module output; by 1; the control signal that connects signaling module output behind 2 contacts starts the MZ (excess temperature in the signaling module automatically; overcurrent self-starting relay J 2 closures; be that the control signal work startup MG of signaling module output and the control signal of signaling module output start the MZ conducting automatically); utilize above-mentioned " manually " control and protective circuit again; three side switching circuit relay J 1 in signaling module; excess temperature in the signaling module; during 2 conductings of overcurrent self-starting relay J, the air-cooled control module of basis of " automatically " position provides working power and protection to this group fan electromotor.
Shown in Figure 5, signal condition indicating member independent power source circuit and signal condition indicating circuit two parts are formed.Power circuit is to utilize this air-cooled control module reliably working power supply A, carry out step-down mutually, satisfies the requirement of signal condition indication light-emitting diode to working power.Signal indicating circuit is to utilize above voltage dropping power supply, by the normal opened contact string green LED of A.C. contactor KM1, indicates this air-cooled control module " power supply I work "; By the normal opened contact string green LED of A.C. contactor KM2, indicate this air-cooled control module " power supply II work "; By the normal opened contact string red light emitting diodes of intermediate relay ZJ, indicate this air-cooled control module " cooler fault "; By the normally closed contact string green LED of intermediate relay ZJ, indicate this air-cooled control module " cooler is normal ".
Shown in Fig. 6 is, signal uploading unit circuit: be the signaling module X23 that inserts with external plug-in terminal, the normal opened contact of string intermediate relay ZJ and 7,8 contacts of function diverter switch SA, the signaling module X24 that inserts by the external plug-in terminal that is connected in series forms this module by signal uploading unit circuit again.As function diverter switch SA during in " stopping " position, 7,8 contacts of function diverter switch SA disconnect, the signal of therefore can not misinformating; As function diverter switch SA during in " manually " or " automatically " position, 7,8 contacts of function diverter switch SA, 5,6 or 1,2 contact conductings, this moment the ventilated machine fault, intermediate relay ZJ excitation and locking, the normal opened contact conducting of intermediate relay ZJ, therefore can be accurately stable upload this group " cooler fault " signal to signaling module.
Claims (5)
1. air-cooled control module of high-power transformer natural circulation, it is characterized in that: it comprises:
The power supply main standby switch unit is used to provide working power and output status signal;
Out-put supply control and protected location, be used for out-put supply control and overcurrent, short circuit, power supply open-phase protection status signal, input termination power supply main standby switch unit, the output connection outreaches fan electromotor provides power supply for it, connects signal uploading unit and signal condition indicating member;
The signal condition indicating member is indicated the operating state of described air-cooled control module, and input connects power supply main standby switch unit and out-put supply control and protected location;
The signal uploading unit is used to upload out-put supply control and protected location operating state, connects the signaling module that outreaches the signal monitoring system;
Above-mentioned power supply main standby switch unit, out-put supply control and protected location, signal condition indicating member and signal uploading unit are installed in the modular tank.
2. air-cooled control module according to claim 1 is characterized in that: described power supply main standby switch unit comprises that the interchange incoming power sky of duplicate supply opens QI, QII, phase sequence relay 1DX, 2DX, A.C. contactor KM1, KM2 and fuse RD1, RD2; This unit divides main circuit and control circuit:
Main circuit: two-way exchanges incoming power I and II～380V, connects interchange incoming power sky respectively and opens QI, QII and A.C. contactor KM1 and KM2, output U3, V3, W3 after the output branch is in parallel;
Control circuit: two-way exchanges U11, the U21 after the incoming power sky is opened protection; serial connection exchanges incoming power fuse RD1, RD2 respectively; A.C. contactor KM2, KM1 normally closed contact; phase sequence relay 1DX, 2DX normally closed contact; and behind the actuation coil of A.C. contactor KM1, KM2, connect W11, the W21 formation control loop that exchanges after the incoming power sky is opened protection respectively.
3. air-cooled control module according to claim 1 is characterized in that: control of described out-put supply and protected location comprise that function diverter switch SA, fan electromotor A.C. contactor KM, thermal relay FRJ1, FRJ2, grouping fan electromotor sky open protection QF1, QF2, QF3, QF4 and intermediate relay ZJ;
The main circuit of this unit connects: described fan electromotor A.C. contactor KM inlet wire position meets described power supply main standby switch unit output contact U3, V3, W3, the outlet position also meets thermal relay FRJ1, FRJ2, the latter two by the plug-in terminal respectively and connect and outreach grouping fan electromotor sky and open protection QF1, QF2 and QF3, QF4, and corresponding connection outreaches fan electromotor MF1, MF2 and MF3, MF4;
Control circuit: the signaling module that this air-cooled control module outreaches the signal monitoring system inserts the output control signal by the plug-in terminal, N phase power supply MK after conversion is connected to 1,5 contacts of function diverter switch SA, energized U3 behind contact 6 serial connection fan electromotor A.C. contactor KM actuation coils, intermediate relay ZJ normally closed contact, thermal relay FRJ2, FRJ1 normally closed contact and the fuse RD3 of function diverter switch SA;
Protective circuit connects: behind the actuation coil of serial connection intermediate relay ZJ; the normally closed contact of its main road serial connection fan electromotor A.C. contactor KM; and connecing thermal relay FRJ1, FRJ2 normal opened contact, it connects the intermediate relay ZJ normal opened contact along separate routes, leads, meets U3 along separate routes and after meeting fuse RD3.
4. air-cooled control module according to claim 1 is characterized in that: described signal condition indicating member comprises the normally opened contact of A.C. contactor KM1, KM2, and intermediate relay ZJ is often opened, normally-closed contact and red, green LED; The normal opened contact serial connection green LED of A.C. contactor KM1 is indicated air-cooled control module " power supply I work "; A.C. contactor KM2 normal opened contact serial connection green LED is indicated air-cooled control module " power supply II work "; Intermediate relay ZJ normal opened contact serial connection red light emitting diodes is indicated air-cooled control module " cooler fault "; The normally closed contact string green LED of intermediate relay ZJ is indicated air-cooled control module " cooler is normal "; Four and connect the back and insert signal condition indication power supply.
5. air-cooled control module according to claim 1, it is characterized in that: described signal uploading unit comprises 7,8 contacts of intermediate relay ZJ normal opened contact and function diverter switch SA, and the two external plug-in terminal in two ends, series connection back inserts signaling module X23, the X24 that outreaches the signal monitoring system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202970257U CN201556506U (en) | 2009-12-17 | 2009-12-17 | Natural circulation air-cooling control module for large transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202970257U CN201556506U (en) | 2009-12-17 | 2009-12-17 | Natural circulation air-cooling control module for large transformer |
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| CN201556506U true CN201556506U (en) | 2010-08-18 |
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| CN2009202970257U Expired - Fee Related CN201556506U (en) | 2009-12-17 | 2009-12-17 | Natural circulation air-cooling control module for large transformer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908728A (en) * | 2010-07-05 | 2010-12-08 | 山东泰开变压器有限公司 | Air-cooled automatic remote control device of transformer |
| CN102507028A (en) * | 2011-10-28 | 2012-06-20 | 江苏省电力公司大丰市供电公司 | Temperature monitoring device for high-frequency switching power supply |
| CN103840425A (en) * | 2014-02-28 | 2014-06-04 | 江苏永钢集团有限公司 | Internal contracting braking wire breaking and warning device of continuous casting withdrawing-straightening motor |
| CN104122790A (en) * | 2013-04-27 | 2014-10-29 | 杭州市电力局 | Cooling system |
| CN108063491A (en) * | 2018-01-01 | 2018-05-22 | 国网宁夏电力有限公司吴忠供电公司 | Forced oil-circulated air-cooled transformer cooling control system |
| CN112261843A (en) * | 2020-10-27 | 2021-01-22 | 国网福建省电力有限公司石狮市供电公司 | Power failure and recovery heat dissipation device for power distribution automation terminal and working method of power failure and recovery heat dissipation device |
-
2009
- 2009-12-17 CN CN2009202970257U patent/CN201556506U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908728A (en) * | 2010-07-05 | 2010-12-08 | 山东泰开变压器有限公司 | Air-cooled automatic remote control device of transformer |
| CN101908728B (en) * | 2010-07-05 | 2013-04-03 | 山东泰开变压器有限公司 | Air-cooled automatic remote control device of transformer |
| CN102507028A (en) * | 2011-10-28 | 2012-06-20 | 江苏省电力公司大丰市供电公司 | Temperature monitoring device for high-frequency switching power supply |
| CN104122790A (en) * | 2013-04-27 | 2014-10-29 | 杭州市电力局 | Cooling system |
| CN104122790B (en) * | 2013-04-27 | 2016-08-17 | 杭州市电力局 | Cooling system |
| CN103840425A (en) * | 2014-02-28 | 2014-06-04 | 江苏永钢集团有限公司 | Internal contracting braking wire breaking and warning device of continuous casting withdrawing-straightening motor |
| CN103840425B (en) * | 2014-02-28 | 2017-05-17 | 江苏永钢集团有限公司 | Internal contracting braking wire breaking and warning device of continuous casting withdrawing-straightening motor |
| CN108063491A (en) * | 2018-01-01 | 2018-05-22 | 国网宁夏电力有限公司吴忠供电公司 | Forced oil-circulated air-cooled transformer cooling control system |
| CN108063491B (en) * | 2018-01-01 | 2024-01-23 | 国网宁夏电力有限公司吴忠供电公司 | Cooling control system of forced oil circulation air-cooled transformer |
| CN112261843A (en) * | 2020-10-27 | 2021-01-22 | 国网福建省电力有限公司石狮市供电公司 | Power failure and recovery heat dissipation device for power distribution automation terminal and working method of power failure and recovery heat dissipation device |
| CN112261843B (en) * | 2020-10-27 | 2024-05-28 | 国网福建省电力有限公司石狮市供电公司 | Power-off and power-on heat dissipation device for power distribution automation terminal and working method thereof |
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Granted publication date: 20100818 Termination date: 20111217 |