CN202444243U - Improved-type converter low-temperature heating circuit for start-up - Google Patents
Improved-type converter low-temperature heating circuit for start-up Download PDFInfo
- Publication number
- CN202444243U CN202444243U CN 201220072378 CN201220072378U CN202444243U CN 202444243 U CN202444243 U CN 202444243U CN 201220072378 CN201220072378 CN 201220072378 CN 201220072378 U CN201220072378 U CN 201220072378U CN 202444243 U CN202444243 U CN 202444243U
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- relay
- temperature
- transformer
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Abstract
The utility model discloses an improved-type converter low-temperature heating circuit for start-up. The improved-type converter low-temperature heating circuit comprises a circuit breaker Q1 connected with a power supply A, wherein the circuit breaker Q1, an over-temperature relay S1, a transformer T1, a relay coil K1 and a neutral point O are connected in series; a dehumidification relay S2 and the over-temperature relay S1 are connected in parallel; and the transformer T1 is internally provided with an over-temperature relay S3. The improved-type converter low-temperature heating circuit for start-up is characterized in that the over-temperature relay S3 is connected between the over-temperature relay S1 and the relay coil K1 in series. The improved-type converter low-temperature heating circuit for start-up provided by the utility model has the advantages that an over-temperature protection relay integrated in the transformer is connected to a heating humidification control loop internally in series; when the condition that the converter is not electrified and a converter control system does not operate occur, the transformer can still trip off the power supply at the front stage of a heating dehumidification circuit under the condition that long-time overload causes over temperature, and the transformer is protected from being burned.
Description
Technical field
The utility model relates to the low-temperature heat of a kind of modified model current transformer and opens machine circuit.
Background technology
Existing wind electric converter generally is applied to cold three northern areas of China, and its temperature is minimum generally in subzero 30 deg.c.Be the part reliability service under the extreme low temperature environment that guarantees that wind electric converter is inner, be equipped with heater in the general electric cabinet cabinet inside is heated that the ambient temperature that guarantees electric component in the cabinet is within the working range of its requirement.
Existing wind electric converter also has and is applied to seashore, intertidal zone; This type of region humidity is very big; For guaranteeing the reliability service of electric component under high humidity environment; Need equally heat the cabinet internal environment to being equipped with heater in the electric cabinet, with the ambient humidity that guarantees electric component in the cabinet within the working range of its requirement.
General through from the direct power taking of on-the-spot 690V three-phase alternating current electrical network, become the resistor etc. that three-phase 400V or single-phase 230V supply with heater or heat purposes through step-down transformer.After the regulator cubicle ambient temperature reached 0 degree centigrade or relative humidity 90%, heater quit work, the current transformer operation that begins to power on.And before the current transformer work,, cause step-down transformer overheat protector problem to solve, thereby accidents such as heater failure causes that step-down transformer burns appear in the scene that is applied to because converter control system is not started working.
The utility model content
The utility model provides the low-temperature heat of a kind of modified model current transformer and open machine circuit, its purpose is to solve the problem of step-down transformer overheat protector.
Provide the low-temperature heat of a kind of modified model current transformer to open machine circuit for overcoming the above problems, comprising: the circuit breaker Q 1 that is connected with power supply A, described circuit breaker Q 1, excess temperature relay S1, transformer T1, relay coil K1, neutral point O are connected in series mutually; Described dehumidifying relay S2 and excess temperature relay S1 are in parallel; Have excess temperature relay S3 in the described transformer T1, it is characterized in that between described excess temperature relay S3 serial connection excess temperature relay S1 and the relay coil K1.
The advantage of the utility model is: the inner integrated overheat protector relay of transformer is sealed in the heating and dehumidification control loop; Do not power on when current transformer occurring; Converter control system is not under the working condition; Transformer still can cause under the situation of excess temperature at long term overloading, the power supply of tripping heating and dehumidification circuit prime, and the protection transformer is not burnt.
Description of drawings
Fig. 1 is the circuit diagram of the utility model.
Embodiment
In conjunction with accompanying drawing the utility model is done further detailed explanation.
Like Fig. 1, machine circuit is opened in the low-temperature heat of a kind of modified model current transformer, comprising: the circuit breaker Q 1 that is connected with power supply A, and described circuit breaker Q 1, excess temperature relay S1, transformer T1, relay coil K1, neutral point O are connected in series mutually; Described dehumidifying relay S2 and excess temperature relay S1 are in parallel; Have excess temperature relay S3 in the described transformer T1, it is characterized in that between described excess temperature relay S3 serial connection excess temperature relay S1 and the relay coil K1.
Operation principle: after the regulator cubicle ambient temperature reached 0 degree centigrade or relative humidity 90%, heater quit work, the current transformer operation that begins to power on.And before the current transformer work; Because converter control system is not started working; Cause step-down transformer overheat protector problem to solve; And seal in the inner integrated overheat protector relay S3 of transformer in the heating and dehumidification control loop this moment, and its overheat protector relay S3 design temperature is greater than 170 degrees centigrade.Do not power on when current transformer occurring; Converter control system is not under the working condition; Step-down transformer T1 still can cause under the situation of excess temperature (being that temperature is greater than 170 degrees centigrade) at long term overloading, the power supply of tripping heating and dehumidification circuit prime, and protection step-down transformer T1 is not burnt.
Claims (3)
1. machine circuit is opened in modified model current transformer low-temperature heat, comprising: the circuit breaker (Q1) that is connected with power supply A, and described circuit breaker (Q1), excess temperature relay (S1), transformer (T1), relay coil (K1), neutral point (O) are connected in series mutually; Described dehumidifying relay (S2) is in parallel with excess temperature relay (S1); Have excess temperature relay (S3) in the described transformer (T1), it is characterized in that between described temperature relay (S3) serial connection excess temperature relay (S1) and the relay coil (K1).
2. machine circuit is opened in a kind of modified model current transformer according to claim 1 low-temperature heat, it is characterized in that described power supply is 690V.
3. machine circuit is opened in a kind of modified model current transformer according to claim 2 low-temperature heat, and the temperature that it is characterized in that described excess temperature relay (S3) setting is greater than 170 degrees centigrade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220072378 CN202444243U (en) | 2012-03-01 | 2012-03-01 | Improved-type converter low-temperature heating circuit for start-up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220072378 CN202444243U (en) | 2012-03-01 | 2012-03-01 | Improved-type converter low-temperature heating circuit for start-up |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202444243U true CN202444243U (en) | 2012-09-19 |
Family
ID=46825673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220072378 Expired - Fee Related CN202444243U (en) | 2012-03-01 | 2012-03-01 | Improved-type converter low-temperature heating circuit for start-up |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202444243U (en) |
-
2012
- 2012-03-01 CN CN 201220072378 patent/CN202444243U/en not_active Expired - Fee Related
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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: 20120919 Termination date: 20210301 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |