CN207976518U - The high-voltage sensor of active mode - Google Patents
The high-voltage sensor of active mode Download PDFInfo
- Publication number
- CN207976518U CN207976518U CN201820094036.4U CN201820094036U CN207976518U CN 207976518 U CN207976518 U CN 207976518U CN 201820094036 U CN201820094036 U CN 201820094036U CN 207976518 U CN207976518 U CN 207976518U
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- biasing resistor
- field
- effect tube
- active mode
- connecting terminal
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Abstract
The utility model is related to a kind of high-voltage sensors of active mode, including inductive probe E1, it is characterized in that：One end of the output end connection biasing resistor R1 of the inductive probe E1, the other end of biasing resistor R1 is separately connected the grid of one end of biasing resistor R2, one end of biasing resistor R3 and field-effect tube Q1, the drain electrode of field-effect tube Q1 is connect with 2 feet of the other end of biasing resistor R3, the cathode of counnter attack diode D1, one end of capacitance C1 and connecting terminal JP1 respectively, and 1 foot of connecting terminal JP1, the other end of capacitance C2, the anode of anti-plate diode D1, the source electrode of field-effect tube Q1, the other end of biasing resistor R2 are grounded.The utility model samples electric field strength by the way of active, improves sensitivity and the anti-interference ability of high-voltage sensor, to improve the reliability and stability of entire electrified display interlock apparatus.
Description
Technical field
The utility model is related to a kind of high-voltage sensor of active mode, especially it is a kind of be mounted in substation and
The matching used high-voltage sensor of high-voltage electriferous display locking device.
Background technology
High-voltage sensor is mounted in 110kV and the above GIS combination electric appliance, the electrification shape for detecting primary side
State.Sensor exports charged signal to high-voltage electriferous display locking device, can indicate the electrification shape of primary side in combined electrical apparatus
State, and block signal is exported when electrification, prevent accident caused by maloperation.
The high-voltage sensor that mainstream uses in current GIS combination electric appliance is passive sample mode, uses metal
Plate induction field intensity, can only export faint sensor current signal.Since weak signal is easily disturbed, live environment compares again
It is relatively severe, cause high-voltage electriferous display locking device to will appear malfunction or instruction mistake.
Invention content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of electrification in high voltage of active mode
Sensor samples electric field strength by the way of active, improves the sensitivity of high-voltage sensor and anti-interference energy
Power, to improve the reliability and stability of entire electrified display interlock apparatus.
According to technical solution provided by the utility model, the high-voltage sensor of the active mode, including induction are visited
Head E1, it is characterized in that：One end of the output end connection biasing resistor R1 of the inductive probe E1, the other end point of biasing resistor R1
Not Lian Jie one end of biasing resistor R2, biasing resistor R3 one end and field-effect tube Q1 grid, the drain electrode point of field-effect tube Q1
It is not connect with 2 feet of the other end of biasing resistor R3, the cathode of counnter attack diode D1, one end of capacitance C1 and connecting terminal JP1,
Source electrode, the biasing resistor of 1 foot of connecting terminal JP1, the other end of capacitance C2, the anode of counnter attack diode D1, field-effect tube Q1
The other end of R2 is grounded.
Further, the connecting terminal JP1 connects high-voltage electriferous display locking device by shielded cable.
Further, there is sampling resistor, one end of the sampling resistor to connect in the high-voltage electriferous display locking device
The other end to the power end of high-voltage electriferous display locking device, sampling resistor is connected to 2 feet of connecting terminal JP1.
Further, the field-effect tube Q1 uses the field-effect tube of junction type N-channel.
The utility model has the following advantages：
（1）The utility model improves the intensity of high-voltage sensor output signal, and output signal is promoted from microampere order
For milliampere grade；
（2）Sensor described in the utility model is by the way of active, compared with the sensor of passive mode, can significantly carry
The anti-interference ability and Measurement Resolution of high sensor；
（3）The utility model can detect the presence or absence of sensor using the high voltage display device of the sensor and pass
The performance of sensor increases the self-test range of device, to improve the reliability of device.
Description of the drawings
Fig. 1 is the schematic diagram of the high-voltage sensor of active mode described in the utility model.
Specific implementation mode
With reference to specific attached drawing, the utility model is described in further detail.
As shown in Figure 1, the high-voltage sensor of active mode described in the utility model includes inductive probe E1, induction is visited
One end of the output end connection biasing resistor R1 of head E1, the other end of biasing resistor R1 be separately connected one end of biasing resistor R2,
The grid of one end and field-effect tube Q1 of biasing resistor R3, field-effect tube Q1 drain electrode respectively with the other end of biasing resistor R3,
The cathode of counnter attack diode D1, one end of capacitance C1 are connected with 2 feet of connecting terminal JP1,1 foot, the capacitance C2 of connecting terminal JP1
The other end, anti-plate diode D1 anode, the source electrode of field-effect tube Q1, the other end of biasing resistor R2 be grounded；It is described to connect
Line terminals JP1 connects high-voltage electriferous display locking device by shielded cable, has in high-voltage electriferous display locking device and adopts
One end of sample resistance, the sampling resistor is connected to the power end of high-voltage electriferous display locking device, and the other end of sampling resistor connects
It is connected to 2 feet of connecting terminal JP1.Wherein, the field-effect tube Q1 uses the field-effect tube of junction type N-channel；Two pole of the counnter attack
Pipe D1 can prevent positive and negative anodes mistake when wiring from damaging element；The capacitance C1 can carry out shaping to output waveform, while also have
Certain Anti-Jamming.
The operation principle of the high-voltage sensor of active mode described in the utility model：High pressure belt described in the utility model
Electric transducer is mating with high-voltage electriferous display locking device（Hereinafter referred to as device）It uses, the sensor is in no electric field signal
When, it is operated in half conducting state, there is the DC offset voltage signal of 1/2VCC on the sampling resistor of device；When the induction of sensor
When probe E1 senses electric field signal, change the switch on intensity of field-effect tube by biasing resistor（Enhancing reduces）, to
Corresponding voltage signal can be got on the sampling resistor of device.
Claims (4)
1. a kind of high-voltage sensor of active mode, including inductive probe E1, it is characterized in that：The inductive probe E1's is defeated
Outlet connects one end of biasing resistor R1, and the other end of biasing resistor R1 is separately connected one end of biasing resistor R2, biasing resistor
The grid of one end and field-effect tube Q1 of R3, field-effect tube Q1 drain electrode respectively with the other end of biasing resistor R3, two pole of counnter attack
The cathode of pipe D1, one end of capacitance C1 are connected with 2 feet of connecting terminal JP1,1 foot of connecting terminal JP1, capacitance C2 it is another
End, the anode of counnter attack diode D1, the source electrode of field-effect tube Q1, biasing resistor R2 the other end be grounded.
2. the high-voltage sensor of active mode as described in claim 1, it is characterized in that：The connecting terminal JP1 passes through
Shielded cable connects high-voltage electriferous display locking device.
3. the high-voltage sensor of active mode as claimed in claim 2, it is characterized in that：The HV live displaying locking
There is sampling resistor, one end of the sampling resistor to be connected to the power end of high-voltage electriferous display locking device, sampling electricity in device
The other end of resistance is connected to 2 feet of connecting terminal JP1.
4. the high-voltage sensor of active mode as described in claim 1, it is characterized in that：The field-effect tube Q1 is using knot
The field-effect tube of type N-channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820094036.4U CN207976518U (en) | 2018-01-20 | 2018-01-20 | The high-voltage sensor of active mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820094036.4U CN207976518U (en) | 2018-01-20 | 2018-01-20 | The high-voltage sensor of active mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207976518U true CN207976518U (en) | 2018-10-16 |
Family
ID=63769391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820094036.4U Active CN207976518U (en) | 2018-01-20 | 2018-01-20 | The high-voltage sensor of active mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207976518U (en) |
-
2018
- 2018-01-20 CN CN201820094036.4U patent/CN207976518U/en active Active
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