CN203721427U - Cooling self-starting device for power distribution transformer - Google Patents
Cooling self-starting device for power distribution transformer Download PDFInfo
- Publication number
- CN203721427U CN203721427U CN201320605337.6U CN201320605337U CN203721427U CN 203721427 U CN203721427 U CN 203721427U CN 201320605337 U CN201320605337 U CN 201320605337U CN 203721427 U CN203721427 U CN 203721427U
- Authority
- CN
- China
- Prior art keywords
- distribution transformer
- relay
- starting device
- overcurrent relay
- cooling self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000001816 cooling Methods 0.000 title claims abstract description 14
- 230000001939 inductive effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Abstract
The utility model discloses a cooling self-starting device for a power distribution transformer. The cooling self-starting device comprises a current transformer, an intermediate relay, an inverse time limit overcurrent relay and a micro circuit breaker for controlling starting and stopping of a fan, wherein the current transformer is arranged at a load wire inlet end; a coil of the inverse time limit overcurrent relay is connected in series between the output ends of the current transformer; an often-open contact of the inverse time limit overcurrent relay is connected in series with a coil of the intermediate relay to form a first branch circuit; an often-open contact of the intermediate relay is connected in series with the fan to form a second branch circuit; the first branch circuit and the second branch circuit are connected to a control loop of the micro circuit breaker after being connected in parallel with each other. According to the cooling self-starting device for the power distribution transformer, the inverse time limit overcurrent relay is used for monitoring a working condition of the power distribution transformer, and the inverse time limit overcurrent relay is cooperated with the intermediate relay to control the starting and the stopping of the fan, so that the work of the fan can be changed according to the working condition of the power distribution transformer; the cooling self-starting device wholly performs operation as required, and energy waste caused by manual operation is avoided.
Description
Technical field
The utility model relates to a kind of self-starting device, relates in particular to a kind of distribution transformer cooling self-starting device.
Background technology
During the broiling summer, mostly by miscellaneous equipments such as blower fan, air compressor machines, power distribution room is blown, allow air form convection current, thereby reach radiating effect, make the distribution transformer synergy of lowering the temperature by force.And existing blower fan, air compressor machine mostly carry out observed temperature variation by staff and manually open, stop to control, and complicated like this operation makes staff often open relief, it is always in running order, and when temperature Change, often forget and carry out closing motion, not only cause the waste of electric power resource, and be unfavorable for the normal safe operation of distribution transformer.
Utility model content
The purpose of this utility model is to provide a kind of distribution transformer cooling self-starting device, can lower the temperature, stop according to distribution transformer oneself state cooling action, thereby make the normal safe operation of distribution transformer.
The utility model adopts following technical proposals:
A kind of distribution transformer cooling self-starting device, comprise current transformer, auxiliary relay, the Countertime limiting overcurrent relay for inductive load supply current and the miniature circuit breaker that opens, stops for controlling blower fan, described current transformer is arranged on load end of incoming cables, and the coil of described Countertime limiting overcurrent relay is connected between the output of current transformer; The normally opened contact of described Countertime limiting overcurrent relay is connected with the coil of auxiliary relay and is formed the first branch road, the normally opened contact of auxiliary relay and fans in series form the second branch road, and the first branch road is connected on miniature circuit breaker control loop with after the second branch circuit parallel connection.
Described auxiliary relay comprises a plurality of normally opened contacts, for being connected to the miniature circuit breaker loop of a plurality of blower fans.
Also comprise that described ammeter and the coil of Countertime limiting overcurrent relay are connected between the output of current transformer for observing the ammeter of distribution transformer operation conditions.
The utility model is simple in structure, by using Countertime limiting overcurrent relay, monitor distribution transformer working condition, and then coordinate auxiliary relay to open, stop to control to blower fan, thereby realized blower fan, can follow distribution transformer working condition and carry out work variation.Whole realization moved as required, avoided the energy waste of manual operation.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, a kind of distribution transformer cooling self-starting device, comprise current transformer LH, auxiliary relay, the Countertime limiting overcurrent relay for inductive load supply current and the miniature circuit breaker that opens, stops for controlling blower fan, described current transformer LH is arranged on load end of incoming cables, and the coil of described Countertime limiting overcurrent relay is connected between the output of current transformer; The normally opened contact of described Countertime limiting overcurrent relay is connected with the coil of auxiliary relay and is formed the first branch road, the normally opened contact of auxiliary relay and fans in series form the second branch road, and the first branch road is connected on miniature circuit breaker control loop with after the second branch circuit parallel connection.Described auxiliary relay comprises a plurality of normally opened contacts, for being connected to the miniature circuit breaker loop of a plurality of blower fans.Also comprise that described ammeter A and the coil of Countertime limiting overcurrent relay are connected between the output of current transformer LH for observing the ammeter A of distribution transformer operation conditions.
The electric current of described Countertime limiting overcurrent relay KA can be adjusted voluntarily according to user's requirement, when the specified operation of the distribution transformer size of current of generally adjusting 1.1～1.3 times.
During normal work, miniature circuit breaker DK is closed, when the electric current of distribution transformer operation is greater than the set point of Countertime limiting overcurrent relay KA electric current, the coil of Countertime limiting overcurrent relay KA must conduct, its corresponding normally opened contact KA1 is closed, and auxiliary relay KM coil can obtain electricly, and the normally opened contact KM1 of corresponding auxiliary relay KM and KM2 are closed, now blower fan M1, M2 will start, and distribution transformer is dispelled the heat.Ammeter A can observe distribution transformer ground ruuning situation intuitively, when the operation of distribution transformer specified.
This device is economical and practical, safe and reliable, can according to the ruuning situation of concrete distribution transformer carry out blower fan open, stop action, tightly do not reach the object of heat radiation, and can dispel the heat in real time according to concrete ruuning situation.
Claims (3)
1. distribution transformer cooling self-starting device, it is characterized in that: comprise current transformer, auxiliary relay, the Countertime limiting overcurrent relay for inductive load supply current and the miniature circuit breaker that opens, stops for controlling blower fan, described current transformer is arranged on load end of incoming cables, and the coil of described Countertime limiting overcurrent relay is connected between the output of current transformer; The normally opened contact of described Countertime limiting overcurrent relay is connected with the coil of auxiliary relay and is formed the first branch road, the normally opened contact of auxiliary relay and fans in series form the second branch road, and the first branch road is connected on miniature circuit breaker control loop with after the second branch circuit parallel connection.
2. distribution transformer cooling self-starting device according to claim 1, is characterized in that: described auxiliary relay comprises a plurality of normally opened contacts, for being connected to the miniature circuit breaker loop of a plurality of blower fans.
3. distribution transformer according to claim 2 cooling self-starting device, it is characterized in that: also comprise that described ammeter and the coil of Countertime limiting overcurrent relay are connected between the output of current transformer for observing the ammeter of distribution transformer operation conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320605337.6U CN203721427U (en) | 2013-09-29 | 2013-09-29 | Cooling self-starting device for power distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320605337.6U CN203721427U (en) | 2013-09-29 | 2013-09-29 | Cooling self-starting device for power distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203721427U true CN203721427U (en) | 2014-07-16 |
Family
ID=51160565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320605337.6U Expired - Fee Related CN203721427U (en) | 2013-09-29 | 2013-09-29 | Cooling self-starting device for power distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203721427U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545087A (en) * | 2013-09-29 | 2014-01-29 | 国家电网公司 | Cooling self-starting device of distribution transformer |
-
2013
- 2013-09-29 CN CN201320605337.6U patent/CN203721427U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545087A (en) * | 2013-09-29 | 2014-01-29 | 国家电网公司 | Cooling self-starting device of distribution transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20190929 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |