CN104297620B - A kind of break detection circuit for electric power special transformer acquisition terminal - Google Patents
A kind of break detection circuit for electric power special transformer acquisition terminal Download PDFInfo
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- CN104297620B CN104297620B CN201410557857.3A CN201410557857A CN104297620B CN 104297620 B CN104297620 B CN 104297620B CN 201410557857 A CN201410557857 A CN 201410557857A CN 104297620 B CN104297620 B CN 104297620B
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Abstract
The present invention relates to electric energy metrical technical field of measurement and test, a kind of specifically related to break detection circuit for electric power special transformer acquisition terminal, including the bleeder circuit being sequentially connected, rectification circuit, oscillating circuit, transformer and digital signaling conversion circuit, the bleeder circuit is connected on the breaker normally opened contact of electric power special transformer acquisition terminal, and the digital signaling conversion circuit is connected to signal receiving center.The present invention can convert thereof into " having " "None" of oscillator signal, judge whether the external cabling of normally opened contact has open circuit in " 0 " and " 1 " for being converted into data signal by detecting the voltage on banked relay normally opened contact.
Description
Technical field
The present invention relates to electric energy metrical technical field of measurement and test, and in particular to a kind of broken string for electric power special transformer acquisition terminal
Detect circuit.
Background technology
Electric power special transformer acquisition terminal is widely used to field of electric power automation, is typically passed through by the master station of Utilities Electric Co.
Its omnidirectional antenna, various orders are sent to the electricity load management terminal positioned at each industrial enterprise, and from the management of power load
Data are extracted in terminal responds code.
Electric power special transformer acquisition terminal is typically all installed on each industrial enterprise, can implement distant control function as needed, right
The switch of user's transmission line of electricity is tripped and closing operation.Wherein distant control function is by the way that the control contact of switch is connected to
Relay in terminal（Abbreviation banked relay）Contact on, it is real by the break-make of banked relay come final controlling switch
Apply tripping operation and close a floodgate.
But in actual use, it is also possible to occur the control wiring of intentional roof-cut resistence, tripped to escape remote control, this is
Severe electricity stealing.In order to prevent above-mentioned situation, it is necessary to detect whether the external cabling of banked relay contact is breaking.Pin
To such case, former electric power special transformer acquisition terminal has no direct detection function, needs manual site to check, it is impossible to send out in time
Existing such case.
The content of the invention
It is an object of the invention to provide a kind of break detection circuit for electric power special transformer acquisition terminal, solve existing
Electric power special transformer acquisition terminal can not whether break-make be, it is necessary to which manual site checks the detection banked relay contact of direct accurate quick
The problem of.
To solve above-mentioned technical problem, the present invention uses following technical scheme：One kind is used for electric power special transformer acquisition terminal
Break detection circuit, including be sequentially connected bleeder circuit, rectification circuit, oscillating circuit, transformer and data signal conversion
Circuit, the bleeder circuit is connected on the breaker normally opened contact of electric power special transformer acquisition terminal, the data signal conversion electricity
Road is connected to signal receiving center.
Further technical scheme is：
The bleeder circuit is made up of resistance R31 series resistance R32, and resistance R33 series resistances R34；
The rectified current routing capacitance C31 is connected in parallel between rectifier bridge N31 cathode output ends and cathode output end and constituted；
The oscillating circuit is by resistance R35, resistance R36, resistance R37, resistance R38, electric capacity C33, electric capacity C34, triode
V31 and triode V32 is constituted, wherein described resistance R35 one end, resistance R36 one end, resistance R37 one end and resistance R38 one end are equal
The electrode input end of oscillating circuit is connected to, the electric capacity C33 is connected to the resistance R35 other end and the resistance R37 other end
Between, the colelctor electrode of the triode V31 is connected to the resistance R35 other end, and triode V31 base stage is connected to resistance R38
The other end, the other end of the resistance R36 is connected to the cathode output end of oscillating circuit, one end connection of the electric capacity C34
To the resistance R38 other end, the electric capacity C34 other end is connected to the cathode output end of oscillating circuit, the collection of the triode V31
Electrode is connected to the cathode output end of oscillating circuit, and the emitter stage of the triode V31 and triode V32 emitter stage are all connected with
To the negative input of oscillating circuit；
The transformer T31 is made up of main side and secondary, and the main side is electric by the cathode output end of oscillating circuit and vibration
The cathode output end concatenation on road is formed, one end ground connection of the secondary；
The digital signaling conversion circuit is made up of triode V41, phase inverter D41A, diode V42 and phase inverter D41B,
The base stage of the triode V41 is connected to the secondary Q2 other end, triode V41 grounded emitter, three poles by resistance R41
Pipe V41 colelctor electrode is connected to phase inverter D41A positive pole, and phase inverter D41A negative pole is connected to diode by resistance R43
V42 positive pole, diode V42 negative pole is connected to phase inverter D41B positive pole, and phase inverter D41B negative pole passes through data signal
The output end of change-over circuit is connected to signal receiving center, wherein the colelctor electrode of the triode V41 also passes through resistance R42 connections
Power supply VCC, the diode V42 negative pole are grounded by electric capacity C41；
The OUT1A for the relay termination of branch road one that resistance R31 series resistances R32 in the bleeder circuit is in series is touched
Point, the branch road one that resistance R33 series resistances R34 is in series terminates the OUT1B contacts of contact relay, the other end of two branch roads
It is respectively connecting to two inputs of rectifier bridge, the positive pole that the cathode output end of the rectifier bridge is connected to oscillating circuit is defeated
Enter end, the cathode output end of rectifier bridge is connected to the negative input of oscillating circuit.
Compared with prior art, the beneficial effects of the invention are as follows：Can be by detecting on banked relay normally opened contact
Voltage, converts thereof into " having " "None" of oscillator signal, and the outer of normally opened contact is judged in " 0 " and " 1 " for being converted into data signal
Whether portion's wiring has open circuit.
Brief description of the drawings
Fig. 1 is a kind of operation logic figure of break detection circuit for electric power special transformer acquisition terminal of the invention.
Fig. 2 is a kind of electrical chain map of break detection circuit for electric power special transformer acquisition terminal of the invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows a kind of one embodiment of break detection circuit for electric power special transformer acquisition terminal of the invention：One
Plant the break detection circuit for electric power special transformer acquisition terminal, including bleeder circuit, rectification circuit, the vibration electricity being sequentially connected
Road, transformer and digital signaling conversion circuit, the breaker that the bleeder circuit is connected to electric power special transformer acquisition terminal are normally opened tactile
On point, the digital signaling conversion circuit is connected to signal receiving center.
Fig. 2 used a kind of break detection circuit for electric power special transformer acquisition terminal of the invention one is preferable to carry out
Example：
The bleeder circuit is made up of resistance R31 series resistance R32, and resistance R33 series resistances R34；
The rectified current routing capacitance C31 is connected in parallel between rectifier bridge N31 cathode output ends and cathode output end and constituted；
The oscillating circuit is by resistance R35, resistance R36, resistance R37, resistance R38, electric capacity C33, electric capacity C34, triode
V31 and triode V32 is constituted, wherein described resistance R35 one end, resistance R36 one end, resistance R37 one end and resistance R38 one end are equal
The electrode input end of oscillating circuit is connected to, the electric capacity C33 is connected to the resistance R35 other end and the resistance R37 other end
Between, the colelctor electrode of the triode V31 is connected to the resistance R35 other end, and triode V31 base stage is connected to resistance R38
The other end, the other end of the resistance R36 is connected to the cathode output end of oscillating circuit, one end connection of the electric capacity C34
To the resistance R38 other end, the electric capacity C34 other end is connected to the cathode output end of oscillating circuit, the collection of the triode V31
Electrode is connected to the cathode output end of oscillating circuit, and the emitter stage of the triode V31 and triode V32 emitter stage are all connected with
To the negative input of oscillating circuit；
The transformer T31 is made up of main side and secondary, and the main side is electric by the cathode output end of oscillating circuit and vibration
The cathode output end concatenation on road is formed, one end ground connection of the secondary；
The digital signaling conversion circuit is by triode V41（9013）, phase inverter D41A（74HC14）, diode V42
（9013）And D41B（74HC14）Constitute, the base stage of the triode V41 is connected to the secondary Q2 other end by resistance R41,
Triode V41 grounded emitter, triode V41 colelctor electrode is connected to phase inverter D41A positive pole, and phase inverter D41A's is negative
Pole is connected to diode V42 positive pole by resistance R43, and diode V42 negative pole is connected to phase inverter D41B positive pole, anti-phase
Output end of the device D41B negative pole Jing Guo digital signaling conversion circuit is connected to signal receiving center, wherein the triode V41
Colelctor electrode also by resistance R42 connection power supplys VCC, diode V42 negative pole by electric capacity C41 ground connection；
The OUT1A for the relay termination of branch road one that resistance R31 series resistances R32 in the bleeder circuit is in series is touched
Point, the branch road one that resistance R33 series resistances R34 is in series terminates the OUT1B contacts of contact relay, the other end of two branch roads
It is respectively connecting to two inputs of rectifier bridge, the positive pole that the cathode output end of the rectifier bridge is connected to oscillating circuit is defeated
Enter end, the cathode output end of rectifier bridge is connected to the negative input of oscillating circuit.
If the normally opened contact of relay：There is voltage between OUT1A contacts and OUT1B contacts, pass through resistance R31, resistance
R32, resistance R33, the bleeder circuit of resistance R34 composition carry out partial pressure, and resistance R31, resistance R32, resistance R33, resistance R34 are chosen
The resistance of high value, to ensure that the electric current passed through can not drive external switch to trip completely, and it is normal to meet banked relay
Open the resistance to pressure request between contact.
Input voltage after partial pressure is input to rectification circuit, and rectification circuit is made up of rectifier bridge N31 and electric capacity C31, work(
Can be from AC rectification into DC voltage input voltage.The DC voltage anode is " V0+ ", and negative terminal is " V0- ".
" V0+ " and " V0- " is input to oscillating circuit, is used as the power supply of oscillating circuit.The preferred self-oscillation electricity of the oscillating circuit
Road, when voltage is higher than setting thresholding（Threshold value can be adjusted by the component value adjusted in oscillating circuit）, vibration electricity
Road can voluntarily starting of oscillation, triode V31 and triode V32 turned on and end in turn, and oscillator signal is produced in transformer T31 front ends
“Q1”。
Oscillator signal is converted to oscillator signal " Q2 ", " Q2 " is anti-phase through triode V41 after transformer T31 isolation conversions,
Again through D41A, RC integrating circuit are output to（It is made up of resistance R43, diode V42, electric capacity C41）, electric capacity C41 chargings are fast, electric discharge
Slowly, oscillator signal continuous superposition on electric capacity C41, finally makes electric capacity C41 be completely filled with electricity, and D41B output signals " Q3 " are low electricity
Flat " 0 ".
If voltage is zero between normally opened contact OUT1A contacts and OUT1B contacts, oscillating circuit not starting of oscillation, final electric capacity
C41 is discharged, and D41B output signals " Q3 " are high level " 1 ".
By the way that with upper type, banked relay normally opened contact external cabling can be judged by detecting the level of " Q3 "
On off operating mode.
When " Q3 " is high level when " 1 ", dead-beat signal, the normally opened electric shock external cabling of banked relay has open circuit.
When " Q3 " is low level when " 0 ", there is oscillator signal, the normally opened electric shock external cabling of banked relay is without open circuit.
Preferably, each component can select following model in above-described embodiment：
Relay model DQ4131T, contact is pressure-resistant 5A/220V, industrial frequency withstand voltage 1KV；
Resistance R31-R34 models：RC1206-470K
Rectifier bridge N31 models MB6S；
Electric capacity C31 models CC0805-1u；
Resistance R35, R36 model RC0805-100K；
Resistance R37, R38 model RC0805-1M；
Electric capacity C33, C34 model C0805-4700P；
Triode V31, V32 model 9013；
Transformer T31 models SPT204；
Resistance R41 models RC0805-1K；
Resistance R42 models RC0805-10K；
Triode V41 models 9013
Phase inverter D41A and D41B model 74HC14；
Resistance R43 models RC0805-100；
Triode V42 models 1N5817；
Electric capacity C41 models CC0805-1u.
Claims (1)
1. a kind of break detection circuit for electric power special transformer acquisition terminal, it is characterised in that：Including the partial pressure electricity being sequentially connected
Road, rectification circuit, oscillating circuit, transformer and digital signaling conversion circuit, the bleeder circuit are connected to electric power and specially become collection
On the breaker normally opened contact of terminal, the digital signaling conversion circuit is connected to signal receiving center；
The bleeder circuit is made up of resistance R31 series resistance R32, and resistance R33 series resistances R34；
The rectified current routing capacitance C31 is connected in parallel between rectifier bridge N31 cathode output ends and cathode output end and constituted；
The oscillating circuit by resistance R35, resistance R36, resistance R37, resistance R38, electric capacity C33, electric capacity C34, triode V31 and
Triode V32 is constituted, wherein described resistance R35 one end, resistance R36 one end, resistance R37 one end and resistance R38 one end are all connected with
To the electrode input end of oscillating circuit, the electric capacity C33 is connected between the resistance R35 other end and resistance the R37 other end,
The colelctor electrode of the triode V31 is connected to the resistance R35 other end, and triode V31 base stage is connected to the another of resistance R38
End, the other end of the resistance R36 is connected to the cathode output end of oscillating circuit, and one end of the electric capacity C34 is connected to resistance
The R38 other end, the electric capacity C34 other end is connected to the cathode output end of oscillating circuit, the emitter stage of the triode V31 and
Triode V32 emitter stage is connected to the negative input of oscillating circuit；
The transformer T31 is made up of main side and secondary, the main side by oscillating circuit cathode output end and oscillating circuit
Cathode output end concatenation is formed, one end ground connection of the secondary；
The digital signaling conversion circuit is made up of triode V41, phase inverter D41A, diode V42 and phase inverter D41B, described
Triode V41 base stage is connected to the secondary Q2 other end, triode V41 grounded emitter, triode by resistance R41
V41 colelctor electrode is connected to phase inverter D41A positive pole, and phase inverter D41A negative pole is connected to diode V42 by resistance R43
Positive pole, diode V42 negative pole is connected to phase inverter D41B positive pole, and phase inverter D41B negative pole is changed by data signal
The output end of circuit is connected to signal receiving center, wherein the colelctor electrode of the triode V41 also passes through resistance R42 connection power supplys
VCC, the diode V42 negative pole are grounded by electric capacity C41；
The OUT1A contacts for the relay termination of branch road one that resistance R31 series resistances R32 in the bleeder circuit is in series,
The branch road one that resistance R33 series resistances R34 is in series terminates the OUT1B contacts of contact relay, the other end point of two branch roads
Two inputs of rectifier bridge are not connected to, and the cathode output end of the rectifier bridge is connected to the positive pole input of oscillating circuit
End, the cathode output end of rectifier bridge is connected to the negative input of oscillating circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410557857.3A CN104297620B (en) | 2014-10-20 | 2014-10-20 | A kind of break detection circuit for electric power special transformer acquisition terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410557857.3A CN104297620B (en) | 2014-10-20 | 2014-10-20 | A kind of break detection circuit for electric power special transformer acquisition terminal |
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| Publication Number | Publication Date |
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| CN104297620A CN104297620A (en) | 2015-01-21 |
| CN104297620B true CN104297620B (en) | 2017-08-25 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105356545B (en) * | 2015-11-27 | 2018-01-12 | 国网江西省电力科学研究院 | A kind of Electrical Safety acquisition module electric supply installation |
| CN109683052A (en) * | 2019-01-14 | 2019-04-26 | 优利德科技(中国)股份有限公司 | A kind of device and method detecting alternating electromagnetic valve system |
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| CN203572900U (en) * | 2013-09-30 | 2014-04-30 | 江苏苏源光一科技有限公司 | Broken line detection circuit for state grid special transformer collection terminal control circuit |
| CN203931159U (en) * | 2014-07-02 | 2014-11-05 | 南京志达电力科技有限责任公司 | Power information collecting device Remote Control Interface broken wire detection system |
| CN204116522U (en) * | 2014-10-20 | 2015-01-21 | 国网四川省电力公司电力科学研究院 | A kind of break detection circuit specially becoming acquisition terminal for electric power |
-
2014
- 2014-10-20 CN CN201410557857.3A patent/CN104297620B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7151818B1 (en) * | 2005-06-08 | 2006-12-19 | Gary Hanington | X-Ray tube driver using AM and FM modulation |
| CN202171641U (en) * | 2011-07-08 | 2012-03-21 | 傅水林 | Carrier wave power supply monitoring module |
| CN203444003U (en) * | 2013-09-18 | 2014-02-19 | 黄太江 | Electricity stealing prevention management system applied to power load terminal |
| CN203572900U (en) * | 2013-09-30 | 2014-04-30 | 江苏苏源光一科技有限公司 | Broken line detection circuit for state grid special transformer collection terminal control circuit |
| CN203931159U (en) * | 2014-07-02 | 2014-11-05 | 南京志达电力科技有限责任公司 | Power information collecting device Remote Control Interface broken wire detection system |
| CN204116522U (en) * | 2014-10-20 | 2015-01-21 | 国网四川省电力公司电力科学研究院 | A kind of break detection circuit specially becoming acquisition terminal for electric power |
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