CN207301161U - A kind of enhanced high-voltage charge display device of stability - Google Patents
A kind of enhanced high-voltage charge display device of stability Download PDFInfo
- Publication number
- CN207301161U CN207301161U CN201721433188.4U CN201721433188U CN207301161U CN 207301161 U CN207301161 U CN 207301161U CN 201721433188 U CN201721433188 U CN 201721433188U CN 207301161 U CN207301161 U CN 207301161U
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- China
- Prior art keywords
- circuit
- voltage
- stability
- current transformer
- control circuit
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- 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 - Fee Related
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Abstract
The utility model discloses a kind of enhanced high-voltage charge display device of stability, including DC power supply circuit, the first current transformer, the second current transformer, dual input switching switch, input protection circuit, AC/DC conversion circuits, signal conditioning circuit, programmable control circuit, indicating circuit, voltage detecting circuit, comparison circuit, counter and control circuit.The utility model has the characteristics that stability is high.
Description
Technical field
Technical field of electric equipment is the utility model is related to, especially, is related to a kind of enhanced electrification in high voltage of stability and shows
Show device.
Background technology
High voltage display device is the supporting loop networks switch being installed in distribution network system, cable branch box, case change
On, for indicating that the short circuit of respective cable electriferous state and respective cable section and one kind of singlephase earth fault monitor dress in real time
Put.Whether its detectable high voltage electric equipment is powered, and shows that equipment under test is in powered shape by modes such as luminous, sounding
State, while powered equipment under test locking is produced into danger to prevent user's mistakenly entering charged chamber.Circuit is powered or breaks down
When, staff can by the police instruction of indicator, rapidly definite circuit currently whether powered and fault section, and find out therefore
Barrier point.In general, high voltage display device all carries out front-end detection using current transformer as sensor, therefore, electricity
The stability of current transformer is particularly important, once there is voltage instability, it is possible to the circuit at rear is impacted.
Utility model content
In view of this, the utility model aim is to provide a kind of enhanced high-voltage charge display device of stability, has and stablizes
The characteristics of property is high.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is：
A kind of enhanced high-voltage charge display device of stability, including DC power supply circuit, the first current transformer, the second electricity
Current transformer, dual input switching switch, input protection circuit, AC/DC conversion circuits, signal conditioning circuit, PLC technology
Circuit, indicating circuit, voltage detecting circuit, comparison circuit, counter and control circuit；Wherein, the DC power supply circuit is used
Power in for each circuit；First current transformer, the second current transformer are electrically connected to dual input switching switch
Two output terminals；The dual input switching switch, input protection circuit, AC/DC conversion circuits, signal conditioning circuit, can compile
Process control circuit, indicating circuit are sequentially connected electrically；The voltage detecting circuit, comparison circuit, counter and control circuit are successively
It is electrically connected；The input terminal of the voltage detecting circuit is electrically connected to the output terminal of dual input switching switch, for detecting two-way
The output voltage of switching switch is inputted, and generates corresponding voltage detection signal；The comparison circuit is used to believe voltage detecting
Number compared with preset value, and corresponding comparison signal is exported according to comparative result；The counter is used to be based on comparing letter
Number counted, and corresponding count signal is exported after the full preset times of meter；The control circuit is used to be based on count signal
To control the dual input switching switch to switch.
Preferably, the programmable control circuit, control circuit are based on chip microcontroller.
Preferably, the dual input switching switch uses single-pole double-throw relay.
Preferably, the counter is based on trigger or chip microcontroller.
The utility model has the technical effect that following aspect：By detecting the stability of current electric current, with root
Switch yet another spare current transformer according to its state, to ensure the stability of high-voltage charge display device.
Brief description of the drawings
Fig. 1 is the circuit diagram of embodiment middle-high pressure electrification display；
Fig. 2 is the circuit diagram of voltage detecting circuit in embodiment；
Fig. 3 is the circuit diagram of comparison circuit in embodiment.
Reference numeral：1st, the first current transformer；2nd, input protection circuit；3rd, AC/DC conversion circuits；4th, signal condition electricity
Road；5th, programmable control circuit；6th, indicating circuit；7th, the second current transformer；8th, voltage detecting circuit；9th, comparison circuit；10、
Counter；11st, control circuit.
Embodiment
Below in conjunction with attached drawing, specific embodiment of the present utility model is described in further detail, so that the utility model skill
Art scheme is more readily understood and grasps.
With reference to Fig. 1, a kind of enhanced high-voltage charge display device of stability, including DC power supply electricity are present embodiments provided
Road, the first current transformer 1, the second current transformer 7, dual input switching switch, input protection circuit 2, AC/DC conversion electricity
Road 3, signal conditioning circuit 4, programmable control circuit 11, indicating circuit 6, voltage detecting circuit 8, comparison circuit 9, counter 10
With control circuit 11.Wherein, DC power supply circuit is used to power for each circuit.It is real that programmable control circuit 11 is based on microcontroller
It is existing.
First current transformer 1, the second current transformer 7 are electrically connected to two output terminals of dual input switching switch；
In the present embodiment, dual input switching switch uses single-pole double-throw relay.In default situations, single-pole double-throw relay and
One path of one current transformer 1 connection is in normally off.
Dual input switching switch, input protection circuit 2, AC/DC conversion circuits 3, signal conditioning circuit 4, programmable control
Circuit 11 processed, indicating circuit 6 are sequentially connected electrically；Voltage detecting circuit 8, comparison circuit 9, counter 10 and control circuit 11 are successively
It is electrically connected.
With reference to Fig. 2, the input terminal of voltage detecting circuit 8 is electrically connected to the output terminal of dual input switching switch（C ends）, use
In the output voltage of detection dual input switching switch, and generate corresponding voltage detection signal Vs.It is electric by connect first
R1, second resistance R2 is hindered to form.
With reference to 3, comparison circuit 9 includes voltage comparator A1 and reference circuit, and reference circuit includes the 3rd be connected in series
Resistance R3, the 4th resistance R4, the other end ground connection of 3rd resistor R3, the other end of the 4th resistance R4 are electrically connected to VCC voltages, from
The tie point output one of 3rd resistor R3, the 4th resistance R4 represent the reference signal Vref of the preset value.Voltage comparator A1
In-phase end be electrically connected to the output terminal of voltage detecting circuit 8 signal Vs detected with receiving voltage, end of oppisite phase is electrically connected to benchmark
Circuit is to receive the reference signal Vref.Therefore, (the first electricity is represented when because unstable saltus step occurs for voltage detection signal Vs
Current transformer 1 is unstable), during more than reference signal Vref, voltage comparator A1 exports the comparison signal Vp of high level, forms one
Subpulse signal.
Counter 10 is based on trigger or chip microcontroller, it is used to be counted based on comparison signal, and full pre- in meter
If corresponding count signal Vj is exported after number（High level）.
Control circuit 11 is based on chip microcontroller, it is electrically connected to counter 10 with count pick up signal Vj；Believe when counting
When number Vj is changed into high level, control circuit 11 controls the coil of above-mentioned single-pole double-throw relay to be powered so that single-pole double throw after
The contact switch switching of electric appliance, switches to the second current transformer 7, is used as the device of front-end detection by the second current transformer 7
Part.
Certainly, it is the representative instance of the utility model above, in addition, the utility model can also have other a variety of
Embodiment, all technical solutions formed using equivalent substitution or equivalent transformation, all falls within the requires of the utility model protection
Within the scope of.
Claims (4)
1. a kind of enhanced high-voltage charge display device of stability, it is characterized in that, including DC power supply circuit, the first current transformer
(1), the second current transformer (7), dual input switching switch, input protection circuit (2), AC/DC conversion circuits (3), signal
Modulate circuit (4), programmable control circuit (11), indicating circuit (6), voltage detecting circuit (8), comparison circuit (9), counter
(10) and control circuit (11)；Wherein, the DC power supply circuit is used to power for each circuit；First current transformer
(1), the second current transformer (7) is electrically connected to two output terminals of dual input switching switch；The dual input switching is opened
Pass, input protection circuit (2), AC/DC conversion circuits (3), signal conditioning circuit (4), programmable control circuit (11) (5), refer to
Show that circuit (6) is sequentially connected electrically；The voltage detecting circuit (8), comparison circuit (9), counter (10) and control circuit (11)
It is sequentially connected electrically；The input terminal of the voltage detecting circuit (8) is electrically connected to the output terminal of dual input switching switch, for examining
The output voltage of dual input switching switch is surveyed, and generates corresponding voltage detection signal；The comparison circuit (9) is used for electricity
Pressure detection signal exports corresponding comparison signal compared with preset value, and according to comparative result；The counter (10) is used
Counted in based on comparison signal, and corresponding count signal is exported after the full preset times of meter；The control circuit (11)
For controlling the dual input switching switch to switch based on count signal.
2. a kind of enhanced high-voltage charge display device of stability as claimed in claim 1, it is characterized in that, the PLC technology
Circuit (11), control circuit (11) are based on chip microcontroller.
3. a kind of enhanced high-voltage charge display device of stability as claimed in claim 1, it is characterized in that, the dual input is cut
Change switch and use single-pole double-throw relay.
4. a kind of enhanced high-voltage charge display device of stability as claimed in claim 1, it is characterized in that, the counter (10)
Based on trigger or chip microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721433188.4U CN207301161U (en) | 2017-11-01 | 2017-11-01 | A kind of enhanced high-voltage charge display device of stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721433188.4U CN207301161U (en) | 2017-11-01 | 2017-11-01 | A kind of enhanced high-voltage charge display device of stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207301161U true CN207301161U (en) | 2018-05-01 |
Family
ID=62274987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721433188.4U Expired - Fee Related CN207301161U (en) | 2017-11-01 | 2017-11-01 | A kind of enhanced high-voltage charge display device of stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207301161U (en) |
-
2017
- 2017-11-01 CN CN201721433188.4U patent/CN207301161U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20201101 |
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| CF01 | Termination of patent right due to non-payment of annual fee |