CN202260395U - Full-stop tripping protection circuit of transformer cooler - Google Patents
Full-stop tripping protection circuit of transformer cooler Download PDFInfo
- Publication number
- CN202260395U CN202260395U CN2011203732164U CN201120373216U CN202260395U CN 202260395 U CN202260395 U CN 202260395U CN 2011203732164 U CN2011203732164 U CN 2011203732164U CN 201120373216 U CN201120373216 U CN 201120373216U CN 202260395 U CN202260395 U CN 202260395U
- Authority
- CN
- China
- Prior art keywords
- contact
- cooling system
- transformer
- protection circuit
- power contactor
- 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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Abstract
The utility model relates to a full-stop tripping protection circuit of a transformer cooler, which comprises a contact (KMM1) of a first-way power contactor of a cooling system and a contact (KMM2) of a second-way power contactor of the cooling system, wherein the contact (KMM1) is connected with the contact (KMM2) in series; and the full-stop tripping protection circuit of the transformer cooler is characterized in that all contacts (KM1, KM2, KM3, KM4 and KM5) of a fan start contactor are respectively connected together in series and then are connected at two ends of the contact (KMM1) of the first-way power contactor of the cooling system and the contact (KMM2) of the second-way power contactor of the cooling system in parallel. A series circuit of a normally closed contact of the fan start contactor is added into the full-stop tripping protection circuit, so that a transformer does have a tripping operation when an air-cooling control power supply disappears and the cooler is fully stopped in deed, and the problem of non-cooling operation of the transformer can be solved.
Description
Technical field
The utility model relates to transformer cooler full cut-off trip protection circuit.
Background technology
In existing ODFPS-500000/750 transformer cooling system control loop and cooler full cut-off protection loop; As long as the two-way power supply of transformer cooling system control loop disappears simultaneously; The contactor KMM1 of first and second road power supply of cooling system, KMM2 will losss of excitation so, and their normally-closed contact KMM1, KMM2 will be closed.The SAM5 change over switch at this moment+the 110V power supply will deliver to the non electrical quantity protective device, and exports under the joint group control of KT4, two time delays relays of KT5 and oil temperature relay transformer is excised when the service position.
But there is such defective in the design in ODFPS-500000/750 transformer cooler full cut-off protection loop: if the two-way power supply of transformer cooling system control loop does not disappear; And the cooler of its input and subsequent use cooler simultaneous faults and shut down, this moment, transformer operated in the no state of cooling.But the contactor KMM1 of its first and second road power supply, KMM2 excitation, their normally-closed contact is opened, and transformer cooler full cut-off protection loop is obstructed, and protection can not export tripping operation.Transformer will be in had not so both had cooler, under the state that can not trip again, and the safety of serious threat transformer.
The utility model content
The purpose of the utility model provides the transformer cooler full cut-off trip protection circuit that can trip smoothly when a kind of transformer operates in the no state of cooling.
A kind of transformer cooler full cut-off trip protection circuit; Comprise the contact of the cooling system first via power contactor that is in series and the contact of cooling system the second road power contactor; Its special feature is; The contact of all fan starting contactors is cascaded respectively, is connected in parallel on the contact of said cooling system first via power contactor and the two ends, contact of cooling system the second road power contactor then.
Wherein the contact of the contact of cooling system first via power contactor and cooling system the second road power contactor is normally-closed contact.
Wherein the contact of all fan starting contactors is normally-closed contact.
The utility model is through increasing the series loop of all fan starting contactor normally-closed contacts; Can be implemented in that air-cooled control power supply disappears and during the certain full cut-off of cooler; Transformer necessarily trips, thereby has solved the nothing cooling operation problem that transformer might occur.
Description of drawings
Accompanying drawing 1 is the circuit theory diagrams of the utility model.
Embodiment
As shown in Figure 1; The utility model comprises the automatic start-up control contact of transformer K5; The contact KMM1 of the cooling system first via power contactor that is in series and the contact KMM2 of cooling system the second road power contactor; The contact KM1 of all fan starting contactors, KM2, KM3, KM4, KM5 are cascaded respectively, are connected in parallel on the KMM2 two ends, contact of the contact KMM1 and cooling system the second road power contactor of said cooling system first via power contactor then.
As shown in Figure 1, the contact KMM2 of the contact KMM1 of cooling system first via power contactor and cooling system the second road power contactor is normally-closed contact, and the contact KM1 of all fan starting contactors, KM2, KM3, KM4, KM5 are normally-closed contact.
As shown in Figure 1, when the two-way power supply of transformer cooling system control loop disappears simultaneously, the contact KMM2 of the contact KMM1 of cooling system first via power contactor and cooling system the second road power contactor will be closed, and transformer can trip; When the cooler that drops into and subsequent use cooler simultaneous faults and shut down, transformer also can trip.No matter be that transformer all can trip because air-cooled control power supply disappears or the certain full cut-off of cooler like this.
Claims (3)
1. transformer cooler full cut-off trip protection circuit; Comprise the contact (KMM1) of the cooling system first via power contactor that is in series and the contact (KMM2) of cooling system the second road power contactor; It is characterized in that: the contact of all fan starting contactors (KM1, KM2, KM3, KM4, KM5) is cascaded respectively, is connected in parallel on the contact (KMM1) of said cooling system first via power contactor and the two ends, contact (KMM2) of cooling system the second road power contactor then.
2. transformer cooler full cut-off trip protection circuit as claimed in claim 1 is characterized in that: wherein the contact (KMM2) of the contact of cooling system first via power contactor (KMM1) and cooling system the second road power contactor is normally-closed contact.
3. according to claim 1 or claim 2 transformer cooler full cut-off trip protection circuit, it is characterized in that: wherein the contact of all fan starting contactors (KM1, KM2, KM3, KM4, KM5) is normally-closed contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203732164U CN202260395U (en) | 2011-09-28 | 2011-09-28 | Full-stop tripping protection circuit of transformer cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203732164U CN202260395U (en) | 2011-09-28 | 2011-09-28 | Full-stop tripping protection circuit of transformer cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202260395U true CN202260395U (en) | 2012-05-30 |
Family
ID=46121580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203732164U Expired - Fee Related CN202260395U (en) | 2011-09-28 | 2011-09-28 | Full-stop tripping protection circuit of transformer cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202260395U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107562008A (en) * | 2017-09-04 | 2018-01-09 | 贵州乌江水电开发有限责任公司构皮滩发电厂 | A kind of cooler full cut-off protection control method of main transformer |
| 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 |
| CN111025069A (en) * | 2019-12-30 | 2020-04-17 | 深圳供电局有限公司 | Method for testing cold control power-off time fixed value of transformer cooler |
-
2011
- 2011-09-28 CN CN2011203732164U patent/CN202260395U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107562008A (en) * | 2017-09-04 | 2018-01-09 | 贵州乌江水电开发有限责任公司构皮滩发电厂 | A kind of cooler full cut-off protection control method of main transformer |
| 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 |
| CN110706892B (en) * | 2019-10-10 | 2022-12-30 | 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 |
| CN111025069A (en) * | 2019-12-30 | 2020-04-17 | 深圳供电局有限公司 | Method for testing cold control power-off time fixed value of transformer cooler |
| CN111025069B (en) * | 2019-12-30 | 2022-08-16 | 深圳供电局有限公司 | Method for testing constant value of cold control power-off time of transformer cooler |
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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: 20120530 Termination date: 20140928 |
|
| EXPY | Termination of patent right or utility model |