CN205081460U - High -voltage switch with super temperature protect function - Google Patents
High -voltage switch with super temperature protect function Download PDFInfo
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- CN205081460U CN205081460U CN201520597148.8U CN201520597148U CN205081460U CN 205081460 U CN205081460 U CN 205081460U CN 201520597148 U CN201520597148 U CN 201520597148U CN 205081460 U CN205081460 U CN 205081460U
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Abstract
The utility model relates to a high -voltage switch with super temperature protect function, including electrical unit, the unit is set for to the protection value, electric current acquisition unit, big voltage coil drive unit and CPU main control unit, electric current acquisition unit's output is connected to the first ADC input channel of group of CPU main control unit, the output of protection value settlement unit is connected to the ADC input channel of second group of CPU main control unit, IO antilinear power amplifier unit output control signal to the big voltage coil drive unit of CPU main control unit. Because the utility model discloses a temperature sensory unit and the same circuit of electric current acquisition unit sharing can not the extra costs that increases device and debugging for the port resource of CPU main control unit can be saved, and in addition, the temperature sensing does not receive the restraint of device, and it is wide to have the sensing scope, and simple structure calculates convenient characteristics.
Description
Technical field
The utility model relates to a kind of high-voltage switch gear with overheat protection function.
Background technology
Usually; intelligent high-pressure switch integrates overcurrent protection, overload protection; can effectively protect intelligent high-pressure switch electric equipment on the line and himself; but also have a kind of fault type easily out in the cold; that is exactly when glitch electric current may be present in the circuit at high-voltage switch gear place chronically; and the current protective device of high-voltage switch gear can not detect, this fault type can be reflected by the temperature rise of of high-voltage switch gear time parts.Traditional high-voltage switch gear with overheat protection function, adopts the temperature rise of parts of temperature transmitter sensing high-voltage switch gear, and is converted into the current signal that CPU main control unit can identify.The defect of this temperature-sensing device is: cost is high, and also occupies the port resource of the preciousness of CPU main control unit.
Summary of the invention
The purpose of this utility model is the defect overcoming prior art, and provide a kind of structure simple, temperature sensing unit and current sampling unit can share the high-voltage switch gear with overheat protection function of same group of port resource.
For achieving the above object, the utility model adopts a kind of like this high-voltage switch gear with overheat protection function, comprises
Power subsystem, with thinking that following element circuit provides power supply;
Protection value setup unit, in order to set the overtemperature prote value of high-voltage switch gear;
Current acquisition unit, comprises the current transformer of more than a group, and described current transformer is in order to the current signal of the high-voltage switch gear place circuit described in real-time sampling;
Large potential winding driver element, in order to drive the action of separating brake solenoid, the separating brake of the high-voltage switch gear described in realization;
And CPU main control unit; the output of described current acquisition unit is connected to first group of ADC input channel of described CPU main control unit; the output of described protection value setup unit is connected to second group of ADC input channel of described CPU main control unit, and the I/O mouth of described CPU main control unit outputs control signals to described large potential winding driver element through power amplification unit.Compared with the prior art; the beneficial effects of the utility model are embodied in: by the output of CPU main control unit timing inquiry current acquisition unit; and Query Result is carried out the computing of distinctive temperature rise computing formula; obtain final temperature rise value; when temperature rise value exceedes the overtemperature prote value of setting; CPU main control unit sends and controls signal to large potential winding driver element, makes the action of separating brake solenoid, realizes the separating brake protection of high-voltage switch gear.Due to temperature sensing unit of the present utility model and the same circuit of current acquisition units shared, the cost of increase device that can not be extra and debugging, the port resource of CPU main control unit is saved, in addition, temperature sensing is not by the constraint of device, have sensing range wide, structure is simple, and computing is feature easily.
Especially, described current acquisition unit comprises respectively in order to the first current transformer and second current transformer of A, C phase current signal of the high-voltage switch gear place circuit described in real-time sampling, and the output of the first described current transformer and the output of the second described current transformer are connected to first group of ADC input channel of described CPU main control unit respectively after rectification, filtering.By the setting of above structure, the output of current transformer is converted to voltage signal, makes its ADC input channel entering CPU main control unit and be able to digital quantization, circuit is simple, and isolating power is strong, and antijamming capability is strong.
Especially, described large potential winding driver element comprises the first relay controlled by the output of described power amplification unit, from a wherein phase power taking of described high-voltage switch gear place circuit, the first control voltage of described separating brake solenoid is picked out through rectifier bridge, the input of described rectifier bridge also connects the normally closed switch of the first described relay, and the normally open contact of the first described relay connects sky.When temperature rise value is normal, by the input of the normally closed switch short circuit rectifier bridge of the first relay, separating brake solenoid must not be electric; And when temperature rise value is abnormal, the line voltage on circuit is loaded on the two ends of separating brake solenoid through bridge rectifier, the action of separating brake solenoid, high-voltage switch gear protection separating brake.
Especially, described large potential winding driver element also comprises the second relay controlled by the output of described power amplification unit, from a wherein phase power taking of described high-voltage switch gear place circuit, the second control voltage of described separating brake solenoid is also picked out through the normal open switch of isolating transformer, voltage-multiplying circuit, the second described relay, second control voltage of described separating brake solenoid and the first control voltage of described separating brake solenoid also connect, and the normally closed interlock of the second described relay connects sky.By above circuit structure, the first control voltage and the second control voltage connected with each other, can ensure that separating brake solenoid obtains reliable adhesive operation voltage.
Especially, the described high-voltage switch gear with overheat protection function also comprises the communication unit of more than, and the communication unit of described more than is connected to the UART serial ports of the correspondence of described CPU main control unit respectively.By the communication unit of more than, operating personnel by remote control center, GPRS communicator and other support the communicator of serial communications, the running status of Long-distance Control or inquiry intelligent high-pressure switch.
Accompanying drawing explanation
Fig. 1 is a kind of functional-block diagram with the high-voltage switch gear of overheat protection function of the utility model;
Fig. 2 is a kind of partial schematic diagram with current acquisition unit in the high-voltage switch gear of overheat protection function of the utility model;
Fig. 3 is a kind of schematic diagram with large potential winding driver element in the high-voltage switch gear of overheat protection function of the utility model.
Embodiment
As shown in Figure 1, a kind of high-voltage switch gear with overheat protection function, comprises
Power subsystem, with thinking that following element circuit provides power supply;
Protection value setup unit, in order to set the overtemperature prote value of high-voltage switch gear;
Current acquisition unit, comprises the current transformer of more than a group, and current transformer is in order to the current signal of real-time sampling high-voltage switch gear place circuit;
Large potential winding driver element, in order to drive the action of separating brake solenoid, realizes the separating brake of high-voltage switch gear;
And CPU main control unit; the output of current acquisition unit is connected to first group of ADC input channel of CPU main control unit; the output of protection value setup unit is connected to second group of ADC input channel of CPU main control unit, and the I/O mouth of CPU main control unit outputs control signals to large potential winding driver element through power amplification unit.
The high-voltage switch gear with overheat protection function also comprises the first communication unit and the second communication unit, and the first described communication unit and the second described communication unit are connected to the UART serial ports of the correspondence of CPU main control unit respectively.
As shown in Figure 2, current acquisition unit comprises respectively in order to the first current transformer HGQ1 and the second current transformer HGQ2 of A, C phase current signal of real-time sampling high-voltage switch gear place circuit, and the output of the first current transformer HGQ1 and the output of the second current transformer HGQ2 are connected to first group of ADC input channel AINA, AINB of CPU main control unit respectively after rectification, filtering.
As shown in Figure 3, large potential winding driver element comprises the first relay R LY1 controlled by the output FenZhaXianQuan of power amplification unit, from a wherein phase J4-1 power taking of high-voltage switch gear place circuit, the first control voltage FenZha+, the FenZha+ of separating brake solenoid is picked out through rectifier bridge D15, the input of rectifier bridge D15 also connects the normally closed switch of the first relay R LY1, and the normally open contact of the first relay R LY1 connects sky.
Large potential winding driver element also comprises the second relay R LY2 controlled by the output FenZhaXianQuan of power amplification unit, from a wherein phase J4-1 power taking of high-voltage switch gear place circuit, the second control voltage of sub control gate line circle is also picked out through the normal open switch of isolating transformer T1, voltage-multiplying circuit, the second relay R LY2, second control voltage of separating brake solenoid and the first control voltage FenZha+, the FenZha+ of separating brake solenoid also connect, and the normally closed interlock of the second relay R LY2 connects sky.
Claims (6)
1. there is a high-voltage switch gear for overheat protection function, it is characterized in that: comprise
Power subsystem, with thinking that following element circuit provides power supply;
Protection value setup unit, in order to set the overtemperature prote value of high-voltage switch gear;
Current acquisition unit, comprises the current transformer of more than a group, and described current transformer is in order to the current signal of the high-voltage switch gear place circuit described in real-time sampling;
Large potential winding driver element, in order to drive the action of separating brake solenoid, the separating brake of the high-voltage switch gear described in realization;
And CPU main control unit; the output of described current acquisition unit is connected to first group of ADC input channel of described CPU main control unit; the output of described protection value setup unit is connected to second group of ADC input channel of described CPU main control unit, and the I/O mouth of described CPU main control unit outputs control signals to described large potential winding driver element through power amplification unit.
2. the high-voltage switch gear with overheat protection function according to claim 1; it is characterized in that: described current acquisition unit comprises respectively in order to the first current transformer and second current transformer of A, C phase current signal of the high-voltage switch gear place circuit described in real-time sampling, and the output of the first described current transformer and the output of the second described current transformer are connected to first group of ADC input channel of described CPU main control unit respectively after rectification, filtering.
3. the high-voltage switch gear with overheat protection function according to claim 1 and 2; it is characterized in that: described large potential winding driver element comprises the first relay controlled by the output of described power amplification unit; from a wherein phase power taking of described high-voltage switch gear place circuit; the first control voltage of described separating brake solenoid is picked out through rectifier bridge; the input of described rectifier bridge also connects the normally closed switch of the first described relay, and the normally open contact of the first described relay connects sky.
4. the high-voltage switch gear with overheat protection function according to claim 3, it is characterized in that: described large potential winding driver element also comprises the second relay controlled by the output of described power amplification unit, from a wherein phase power taking of described high-voltage switch gear place circuit, also through isolating transformer, voltage-multiplying circuit, the normal open switch of the second described relay picks out the second control voltage of described separating brake solenoid, second control voltage of described separating brake solenoid and the first control voltage of described separating brake solenoid also connect, the normally closed interlock of the second described relay connects sky.
5. the high-voltage switch gear with overheat protection function according to claim 1,2 or 4; it is characterized in that: the described high-voltage switch gear with overheat protection function also comprises the communication unit of more than, the communication unit of described more than is connected to the UART serial ports of the correspondence of described CPU main control unit respectively.
6. the high-voltage switch gear with overheat protection function according to claim 3; it is characterized in that: the described high-voltage switch gear with overheat protection function also comprises the communication unit of more than, the communication unit of described more than is connected to the UART serial ports of the correspondence of described CPU main control unit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520597148.8U CN205081460U (en) | 2015-07-31 | 2015-07-31 | High -voltage switch with super temperature protect function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520597148.8U CN205081460U (en) | 2015-07-31 | 2015-07-31 | High -voltage switch with super temperature protect function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205081460U true CN205081460U (en) | 2016-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520597148.8U Active CN205081460U (en) | 2015-07-31 | 2015-07-31 | High -voltage switch with super temperature protect function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205081460U (en) |
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2015
- 2015-07-31 CN CN201520597148.8U patent/CN205081460U/en active Active
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