CN105119239A - Intelligent power grid transformer micro-control protector - Google Patents
Intelligent power grid transformer micro-control protector Download PDFInfo
- Publication number
- CN105119239A CN105119239A CN201510595852.4A CN201510595852A CN105119239A CN 105119239 A CN105119239 A CN 105119239A CN 201510595852 A CN201510595852 A CN 201510595852A CN 105119239 A CN105119239 A CN 105119239A
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- China
- Prior art keywords
- transformer
- control circuit
- micro
- switch mechanism
- electromagnetic switch
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- 230000001012 protector Effects 0.000 title claims abstract description 15
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 5
- 238000012913 prioritisation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to an intelligent power grid transformer micro-control protector and belongs to the field of power supply protective equipment. The intelligent power grid transformer micro-control protector comprises a housing and an electromagnetic switch mechanism fixedly arranged in the housing and is characterized in that the contact of the electromagnetic switch mechanism is connected with a low-voltage-side wire and a load wire of a transformer; a current transformer is arranged on the low-voltage-side wire of the transformer; the output end of the current transformer is connected with the input end of a control circuit; the output end of the control circuit is connected with the coil of the electromagnetic switch mechanism; and the input end of the control circuit is connected with a setting key. The intelligent power grid transformer micro-control protector monitors load current in real time and may sensitively respond in order to disconnect a circuit protection transformer once the load current is over a limit.
Description
Technical field
The invention provides a kind of intelligent grid transformer micro-control protector, belong to power supply protection apparatus field.
Background technology
The housing grade of electric switch divides according to current value, when user selects switch, is all generally determine according to the size of load.And the protection of power transformer in electrical network, especially overcurrent protection, then require to have between the load current value of the switch under transformer and the current value of transformer rated capacity one suitable to mate amount.But user is the actual switch used in electrical network, does not generally possess the overcurrent protection function to transformer, so often occur because of overload in operation of power networks, causes the accident that transformer burns.
Summary of the invention
According to above deficiency of the prior art, the problem to be solved in the present invention is: provide a kind of Real-Time Monitoring load current, cuts off the intelligent grid transformer micro-control protector of circuit once transfinite to be quick on the draw.
The technical solution adopted for the present invention to solve the technical problems is: intelligent grid transformer micro-control protector; comprise housing; and the electromagnetic switch mechanism be fixedly installed in housing; it is characterized in that contact connection transformer low-pressure side wire and the load wire of electromagnetic switch mechanism; step down side wire arranges current transformer; the input of the output connection control circuit of current transformer; the output of control circuit connects the coil of electromagnetic switch mechanism, and the input of control circuit also arranges to be connected with and arranges key.
Operating current in current transformer Real-Time Monitoring circuit, the CPU in control circuit, according to the electric current monitored, is closed a floodgate or separating brake by electromagnetic mechanism control switch mechanism.CPU in control circuit is by program setting different gears suitable from transformer rated capacity current value; the load current value gear of intelligent grid transformer micro-control protector is selected by arranging key; and the capacity of this current value gear and transformer matches; by the overcurrent protection function of intelligent grid transformer micro-control protector, realize the object protecting transformer.
As prioritization scheme, the three-phase line of described step down side wire arranges current transformer respectively, the input of the output connection control circuit of instrument transformer.The current data that the output of monitoring transformer implemented by current transformer judges to the CPU in control circuit altogether.
As prioritization scheme, the described key that arranges is 1-3.Setting can be selected as required.
Described control circuit can adopt processor of single chip computer, and its circuit connects for common prior art, and by the industry, technical staff is grasped.
The beneficial effect that intelligent grid transformer micro-control protector of the present invention has is: by arranging current transformer Real-Time Monitoring current value on the wire of step down side; and signal is transported in control circuit and judges; if there is overcurrent condition; then disconnect the load that electromagnetic switch mechanism connects timely, reach the object of protection transformer.CPU in control circuit is by program setting different gears suitable from transformer rated capacity current value; set according to the capacity of transformer by arranging key; such user just can be in actual use; according to the capability value of transformer in electrical network; select the load current value matched completely with it; by the overcurrent protection function of intelligent grid transformer micro-control protector, ensure the security of operation of transformer.
Accompanying drawing explanation
Fig. 1 is functional-block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described further:
As shown in Figure 1, housing is fixedly installed electromagnetic switch mechanism.The contact connection transformer low-pressure side wire of electromagnetic switch mechanism and load wire.Step down side wire arranges current transformer, the input of the output connection control circuit of current transformer, the output of control circuit connects the coil of electromagnetic switch mechanism, and the input of control circuit is also provided with 1-3 and arranges key.The three-phase line of step down side wire arranges current transformer respectively, the input of the output connection control circuit of instrument transformer.Zero-sequence transformer connection control circuit can also be set as required.
Describedly arranging the button that key both can be the different gear of Three Represents, also can be a switch key switching different gear.
The CPU of described control circuit can adopt processor of single chip computer, and its circuit connects and is programmed to common prior art, and by the industry, technical staff is grasped.
Operation principle and process:
First according to the current value of transformer rated capacity, by the different control gear that CPU software set control circuit is suitable from transformer rated capacity current value, then by arranging key, user selects corresponding gear according to the rated capacity of different transformer again.Operating current in current transformer Real-Time Monitoring circuit, the CPU in control circuit, according to the electric current monitored, is closed a floodgate or separating brake by electromagnetic mechanism control switch mechanism, by its overcurrent protection function, realizes the object protecting transformer.
Claims (3)
1. intelligent grid transformer micro-control protector; comprise housing; and the electromagnetic switch mechanism be fixedly installed in housing; it is characterized in that: the contact connection transformer low-pressure side wire of electromagnetic switch mechanism and load wire; step down side wire arranges current transformer; the input of the output connection control circuit of current transformer, the output of control circuit connects the coil of electromagnetic switch mechanism, and the input of control circuit also arranges to be connected with and arranges key.
2. intelligent grid transformer micro-control protector according to claim 1, is characterized in that: the three-phase line of described step down side wire arranges current transformer respectively, the input of the output connection control circuit of instrument transformer.
3. intelligent grid transformer micro-control protector according to claim 1, is characterized in that: the described key that arranges is 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510595852.4A CN105119239A (en) | 2015-09-17 | 2015-09-17 | Intelligent power grid transformer micro-control protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510595852.4A CN105119239A (en) | 2015-09-17 | 2015-09-17 | Intelligent power grid transformer micro-control protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105119239A true CN105119239A (en) | 2015-12-02 |
Family
ID=54667165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510595852.4A Pending CN105119239A (en) | 2015-09-17 | 2015-09-17 | Intelligent power grid transformer micro-control protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105119239A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336247A (en) * | 2019-08-14 | 2019-10-15 | 张增禄 | A kind of method for protecting transformer holds control device and protection system |
-
2015
- 2015-09-17 CN CN201510595852.4A patent/CN105119239A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336247A (en) * | 2019-08-14 | 2019-10-15 | 张增禄 | A kind of method for protecting transformer holds control device and protection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151202 |
|
| WD01 | Invention patent application deemed withdrawn after publication |