CN200990307Y - Compound switch for transformer cooler - Google Patents
Compound switch for transformer cooler Download PDFInfo
- Publication number
- CN200990307Y CN200990307Y CN 200620106076 CN200620106076U CN200990307Y CN 200990307 Y CN200990307 Y CN 200990307Y CN 200620106076 CN200620106076 CN 200620106076 CN 200620106076 U CN200620106076 U CN 200620106076U CN 200990307 Y CN200990307 Y CN 200990307Y
- Authority
- CN
- China
- Prior art keywords
- switch
- signal processing
- latching relay
- processing module
- magnetic latching
- 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 - Lifetime
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Abstract
The utility model relates to an improved control switch, in particular to a compound switch used for a transformer cooler. The present technology has the problems of that a contact apparatus is prone to be burnt out and the operation is unreliable. The utility model has an input terminal and an out terminal; wherein, a controllable silicon switch and a magnetic latching relay are arranged between the output terminal and the input terminal in series; the controllable silicon switch and the magnetic latching relay are connected with a signal processing module; the circuit of the signal processing is provided with a control signal input interface. Through the smart and skilled combination of the controllable silicon switch and the magnetic latching relay, the compound switch has the advantages of high voltage bearing and large volume of the control silicon switch during the short periods of switching on and cutting off; furthermore, while being normally connected, the compound switch then has the advantages of no power consumption on the contact apparatus, steady and reliable operation and long service life.
Description
[technical field]
The utility model relates to a kind of improved control switch, especially a kind of combination switch that is used for transformer cooler.
[background technology]
Can produce a large amount of heats during transformer work,, be provided with cooler on the transformer side usually and come to lower the temperature to transformer for guaranteeing its operate as normal.During work, control the cooler running status according to the temperature conditions of transformer.
The operating state of cooler is to realize controlling by the state that changes the cooler switch, and existing cooler switch is generally contactor.In actual use, the cooler switching is very frequent, adopts the tradition contact to carry out the problem that there is the easy sintering of contacts of contactor in the cooler switching, will cause the transformer cooling system fault, influences the reliability service of transformer.
[utility model content]
In order to overcome the above-mentioned defective that exists in the prior art, the utility model provides a kind of combination switch that is used for transformer cooler, by improving its structure, to guarantee switch energy long-term stable operation, improves the transformer reliability of operation.
For this reason, the utility model is by the following technical solutions: it has input and output, reverse-blocking tetrode thyristor and magnetic latching relay have been arranged in parallel between described input and the output, described reverse-blocking tetrode thyristor all links to each other with signal processing module with magnetic latching relay, and described signal processing circuit is connected with the control signal input interface.During use, input is connected power supply, output connects cooler.Control signal input interface and relevant total control elements continuous (as PLC), signal processing module is in order to handle received control signal and to control reverse-blocking tetrode thyristor and the state of magnetic latching relay.During switch closure,, control magnetic latching relay adhesive conducting again after stablizing in voltage zero-cross twinkling signal processing module control controllable silicon elder generation zero cross fired; Switch is that the control magnetic latching relay disconnects earlier when disconnecting, and the controllable silicon delay zero-crossing disconnects, thereby realizes the current over-zero excision.Make combination switch have the withstand voltage height of reverse-blocking tetrode thyristor, advantage capacious, and during normal the connection, have the advantage that contactless contactor does not have power consumption in the moment that switches on and off, stable, reliable, long service life.
Be provided with delay circuit in the described signal processing module.Delay circuit is in order to providing time delayed signal, and the work schedule of control magnetic latching relay and reverse-blocking tetrode thyristor makes both the action certain hour of being separated by, and gives full play to both advantages.
Also be provided with the zero passage treatment circuit in the described signal processing module, in order to break-make at voltage zero-cross time control reverse-blocking tetrode thyristor.
Be provided with thyristor gating circuit between described signal processing module and the reverse-blocking tetrode thyristor, in order to trigger thyristor gating circuit.
The beneficial effects of the utility model are: combine with the ingenious of magnetic latching relay by reverse-blocking tetrode thyristor, make combination switch have the withstand voltage height of reverse-blocking tetrode thyristor, advantage capacious in the moment that switches on and off, and during normal the connection, have the advantage that contactless contactor does not have power consumption, stable, reliable, long service life.
[description of drawings]
Fig. 1 is a structural principle schematic diagram of the present utility model.
Fig. 2 is a course of work action block diagram of the present utility model.
[embodiment]
The combination switch that is used for transformer cooler as shown in Figure 1, magnetic latching relay 3 and reverse-blocking tetrode thyristor 4 are parallel between input 1 and the output 2, reverse-blocking tetrode thyristor 4 links to each other with signal processing module 6 by thyristor gating circuit 5, magnetic latching relay 3 also links to each other with signal processing module 6, and signal processing module 6 is connected with control signal input interface 7.Be provided with delay circuit and zero passage treatment circuit in the signal processing module 7.
During use, the combination switch input is connected power supply, output connects cooler.Control signal input interface and relevant total control elements continuous (as PLC), when PLC sent switching signal, in zero passage constantly, by the zero passage processing circuit processes, signal processing module output silicon controlled trigger signal made the controllable silicon conducting.Delay time after two cycles (about 40ms), promptly handle by delay circuit, signal processing module output closure signal is effective, starts the closed conducting of magnetic holding contact, finishes a feed motion of combination switch.When PLC sent sub-gate signal, the signal processing module output signal made the segmentation immediately of magnetic holding contact, after the same time-delay two cycles (40ms), handle signal processing module output low level signal by delay circuit, controllable silicon is turn-offed, finish a separating brake action of combination switch.
Claims (4)
1, the combination switch that is used for transformer cooler, it is characterized in that: it has input and output, reverse-blocking tetrode thyristor and magnetic latching relay have been arranged in parallel between described input and the output, described reverse-blocking tetrode thyristor all links to each other with signal processing module with magnetic latching relay, and described signal processing circuit is connected with the control signal input interface.
2, the combination switch that is used for transformer cooler according to claim 1 is characterized in that: be provided with delay circuit in the described signal processing module.
3, the combination switch that is used for transformer cooler according to claim 2 is characterized in that: also be provided with the zero passage treatment circuit in the described signal processing module.
4, according to each described combination switch that is used for transformer cooler of claim 1 to 3, it is characterized in that: be provided with thyristor gating circuit between described signal processing module and the reverse-blocking tetrode thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620106076 CN200990307Y (en) | 2006-07-27 | 2006-07-27 | Compound switch for transformer cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620106076 CN200990307Y (en) | 2006-07-27 | 2006-07-27 | Compound switch for transformer cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200990307Y true CN200990307Y (en) | 2007-12-12 |
Family
ID=38941339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620106076 Expired - Lifetime CN200990307Y (en) | 2006-07-27 | 2006-07-27 | Compound switch for transformer cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200990307Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122790A (en) * | 2013-04-27 | 2014-10-29 | 杭州市电力局 | Cooling system |
| CN104967367A (en) * | 2015-06-04 | 2015-10-07 | 江苏国电南自海吉科技有限公司 | Intelligent power supply switch designing method by parallel connection of thyristor and power relay |
-
2006
- 2006-07-27 CN CN 200620106076 patent/CN200990307Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104967367A (en) * | 2015-06-04 | 2015-10-07 | 江苏国电南自海吉科技有限公司 | Intelligent power supply switch designing method by parallel connection of thyristor and power relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071212 |
|
| EXPY | Termination of patent right or utility model |