CN110212491A - A kind of intelligence safety device - Google Patents
A kind of intelligence safety device Download PDFInfo
- Publication number
- CN110212491A CN110212491A CN201910503061.2A CN201910503061A CN110212491A CN 110212491 A CN110212491 A CN 110212491A CN 201910503061 A CN201910503061 A CN 201910503061A CN 110212491 A CN110212491 A CN 110212491A
- Authority
- CN
- China
- Prior art keywords
- thyristor
- photoelectrical coupler
- processor
- safety device
- varistor
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/17—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values giving an indication of the number of times this occurs, i.e. multi-channel analysers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
- H02H7/05—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers for capacitive voltage transformers, e.g. against resonant conditions
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of intelligent safety devices; it is related to overvoltage protection field; including thyristor, rectifier bridge, varistor, photoelectrical coupler, processor; the anode and cathode of the thyristor connect respectively voltage transformer secondary side neutral point and systematically on, thyristor controls turn-on and turn-off by processor；Rectification bridge joint in voltage transformer secondary neutral point and systematically between, the DC output end series connection varistor of rectifier bridge is followed by photoelectrical coupler access processor；Technical solution of the present invention can be widely applied to power industry and industrial and mining enterprises, device has reliable Electro Magnetic Compatibility and can correctly act, with to avoid the major accident that repeatedly may cause, intelligence safety device of the present invention may be reused, and the stable operation of energy safeguards system is simultaneously reduced expenses.
Description
Technical field
The present invention relates to overvoltage protection field, specially a kind of intelligent safety device.
Background technique
Discharge protector is the device of the secondary side overvoltage protection applied to indoor and outdoor voltage transformer, can be avoided height
Voltage bring secondary circuit and cause voltage and increase damage to secondary facility or even the person, be a kind of overvoltage protection dress
It sets.
There is hidden danger and defect in use in current existing common discharge protector, such as: in voltage transformer secondary side
Using in the system of neutral-point solid ground, due to the requirement of anti-accident measures, the grounding point of voltage transformer secondary side is often
It is grounded in control room, after common discharge protector breakdown, the neutral point direct metal of equipment is grounded, so that mutual induction of voltage
Device secondary circuit becomes two points ground fault, does not have any alarm prompt to operations staff at this time, this has the safe operation of system
Very big hidden danger.
Meanwhile Secondary Circuit of Potential Transformer is not allow for two points ground fault, once two points ground fault occurs, such as fails to send out in time
Existing, ground fault once occurs for an earthed system at this time, and short circuit current flows through grounded screen, is formed between two secondary grounding points
Potential difference may cause false protection accident.Secondary Circuit of Potential Transformer is great caused by two points ground fault due to occurring
Accident has had occurred a lot of.
Common discharge protector cannot be reused, it is necessary to which the equipment more renewed lacks there is also scrapping after disruptive discharge
It falls into.The mechanical structure of common discharge protector determines that its discharge current error is larger, so cannot be according to the fortune of electric system
The change of line mode is adjusted in time.
Summary of the invention
The present invention cannot reuse to solve common discharge protector, breakdown voltage is fixed, keep voltage mutual when puncturing
Sensor secondary neutral, which becomes two points ground fault, to be had security risk and does not have warning function, and a kind of intelligence guarantor is provided
Dangerous device.
The technical scheme is that:
A kind of intelligence safety device, including thyristor, rectifier bridge, varistor, photoelectrical coupler, processor, the crystalline substance
The anode and cathode of brake tube connect respectively voltage transformer secondary side neutral point and systematically on, thyristor is controlled by processor
Turn-on and turn-off；Rectification bridge joint in voltage transformer secondary neutral point and systematically between, the DC output end of rectifier bridge
Series connection varistor is followed by photoelectrical coupler access processor.
Preferably, the anode and cathode of thyristor VS1 be connected to voltage transformer secondary neutral point and systematically between,
The control electrode of thyristor VS1 is connected on the cathode of thyristor VS2；The anode of thyristor VS2 connects silicon-controlled driving photoelectricity coupling
Sun connection relay J1 output end one end of clutch U1, thyristor VS2, relay J1 output end is another to be connected to voltage transformer
Secondary neutral；The control electrode of thyristor VS2 accesses silicon-controlled driving photoelectrical coupler U1；Silicon-controlled driving photoelectrical coupler U1
Connect processor U3；Contact relay driving circuit and relay J1 on processor U3；The exchange of voltage transformer secondary side exports
Terminate rectifier bridge A1, the output end and direct current of rectifier bridge A1 GND1 indirect discharge tube G1, the output end of rectifier bridge A1 concatenates
The prime of photoelectrical coupler U2 is accessed after protective resistance RX, varistor RV；The other foot of photoelectrical coupler U2 prime connects directly
The rear class collector pin of stream ground GND1, photoelectrical coupler U2 connect high level, the rear class hair of photoelectrical coupler U2 through pull-up resistor
Emitter-base bandgap grading pin meets isolator GND2, and it is defeated that the I/O pin of the rear class collector pin access processor U3 of photoelectrical coupler U2 does signal
Enter end.
In order to increase the reliability of intelligent safety device of the invention, involution button, involution side are further connected on the processor
Button, number display and police instruction is arranged in formula, can early warning in time and involution.It is settable that button is arranged in the involution mode
Automatic resetting mode and hand resetting mode.The police instruction includes alarm lamp and relay signal.
Preferably, the varistor resistance value is adjustable, and varistor RV can be changed by band switch in access circuit
The quantity of varistor, to change the resistance value of varistor RV to reach the amplitude for changing varistor RV conducting voltage, pressure
The voltage magnitude range that quick resistance RV can be connected is 300V~1000V.
Preferably, the invention also includes communication module, processor connection communication module can be with reported data, so that operation people
Member grasps equipment operating condition in time.
Technical solution of the present invention can be widely applied to power industry and industrial and mining enterprises, and device has reliable Electro Magnetic Compatibility
And can correctly act, with to avoid the major accident that repeatedly may cause.The police instruction of the device, action frequency display can
Intuitive display, and signal can be uploaded, the operating condition for understanding and grasping equipment in time for operations staff is provided one
Completely newly, reliable foundation.Intelligence safety device of the present invention may be reused, and the stable operation and saving of energy safeguards system are opened
Branch.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of intelligent safety device of the present invention.
Fig. 2 is a kind of circuit diagram of intelligent safety device of the present invention.
Fig. 3 is a kind of schematic diagram of intelligent safety device power unit of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.
As shown in Figure 1, a kind of intelligence safety device, including thyristor, rectifier bridge, varistor, photoelectrical coupler, processing
Device, the anode and cathode of thyristor connect respectively voltage transformer secondary side neutral point and systematically on, thyristor is by handling
Device controls turn-on and turn-off；Rectification bridge joint in voltage transformer secondary neutral point and systematically between, the direct current output of rectifier bridge
End series connection varistor is followed by photoelectrical coupler access processor.Involution button, number display and report are further connected on processor
Alert instruction.
When normal work, thyristor is in an off state, when voltage transformer secondary side neutral point voltage increases, passes through
Voltage after rectifier bridge rectification is pressure-sensitive when the voltage with varistor reaches conducting voltage by varistor institute clamper
Resistance conducting, the conducting of photoelectrical coupler prime, rear class are also connected therewith, and Continuity signal is sent to processor, and processor collects
Turn on thyristors is controlled after the Continuity signal of photoelectrical coupler, puts voltage transformer secondary side neutral point to systematically conducting
Electricity, simultaneous processor, which controls number display and counts, adds one, and control police instruction issues early warning.
Specific embodiment is as shown in Fig. 2, the anode and cathode of thyristor VS1 is connected to the neutral point of voltage transformer secondary
Between systematically, the control electrode of thyristor VS1 is connected on the cathode of thyristor VS2；The anode connection of thyristor VS2 is controllable
Silicon drives photoelectrical coupler U1, sun connection relay J1 output end one end of thyristor VS2, another termination of relay J1 output end
To voltage transformer secondary neutral point；The control electrode of thyristor VS2 accesses silicon-controlled driving photoelectrical coupler U1；Silicon-controlled driving
Photoelectrical coupler U1 connection processor U3；Two-way relay drive circuit, relay J1, relay J2 are met on processor U3；Electricity
The ac output end of pressure mutual inductor secondary side meets rectifier bridge A1, the output end and direct current of rectifier bridge A1 GND1 indirect discharge tube
The prime of photoelectrical coupler U2 is accessed after output end concatenation protective resistance RX, the varistor RV of G1, rectifier bridge A1；Photoelectricity coupling
GND1, the rear class collector pin of photoelectrical coupler U2 connect high electricity through pull-up resistor to the other foot of clutch U2 prime with connecing direct current
Flat, the rear class emitter pin of photoelectrical coupler U2 connects isolator GND2, the rear class collector pin access of photoelectrical coupler U2
The I/O pin of processor U3 does signal input part.The manual key SW1 for involution is further connected on processor U3, for externally defeated
The relay J2 of relay signal and its control circuit, alarm lamp LED1, the setting button for involution mode is arranged out
Charactron driver U4 is further connected on SW2, processor U3, charactron driver U4 connection three digital tube displays do number
Display.
Wherein thyristor VS1 uses KP50, thyristor VS2 that T2513NH, silicon-controlled driving photoelectrical coupler U1 is used to use
MOC3020, processor U3 use C8051F330, photoelectrical coupler U2 that P320, charactron driver U4 is used to use HD7279,
Relay J1, relay J2 select normally opened relay.
As shown in figure 3, the power unit of the present apparatus is converted into AC9.5V through transformer B1 by AC220V alternating current, by whole
Stream bridge A2 is converted into direct current, and direct current is converted into 5V DC power supply through L7805 power supply chip T1, and 5V direct current is through LM1117 electricity
Source chip T2 is converted into 3.3V DC power supply, 5V and 3.3V DC power supply provides DC power supply to the present apparatus.
Varistor RV can change the quantity of varistor in access circuit by band switch, to change pressure-sensitive electricity
The resistance value of RV is hindered to reach the amplitude for changing varistor RV conducting voltage, and the voltage magnitude range that varistor RV can be connected is
300V~1000V.
The settable two kinds of involution modes of button: automatic resetting and hand resetting are arranged by involution mode in the present apparatus.Setting
Button SW2 is used to be arranged the involution mode of device, and setting button SW2 is kept to be automatic resetting mode, setting when lifting status
Button SW2 holding is pressed when falling state as hand resetting.When hand resetting, presses the manual key SW1 present apparatus and carry out involution.
In actual use, when voltage transformer secondary neutral point over-voltage, the voltage on varistor RV reaches electric conduction
Pressure, varistor RV conducting, photoelectrical coupler U2 prime are triggered, and rear class conducting, processor U3 detects low level signal, locate
Device U3 control relay J1 closure is managed, while controlling silicon-controlled driving photoelectrical coupler U1 driving thyristor VS2 conducting, makes brilliant lock
There is electric current to flow through and then be connected between pipe VS1 control electrode and anode, thyristor VS1 conducting puts neutral point to systematically conducting
Electricity, processor U3 control alarm lamp LED1 is bright, control relay J2 is closed, the control work display counting of charactron 1~3.
When neutral point restores normal to voltage systematically, according to the involution of the involution mode realization device of setting.Example
Such as: device is set as hand resetting, then presses manual key SW1, and processor U3 receives the slot signal of manual key SW1
Afterwards, control thyristor VS1 is turned off, alarm lamp LED1 goes out, relay J2 is disconnected.When device is set as automatic resetting, then
Because neutral point restores normal to voltage systematically, varistor RV restores high-impedance state, and photoelectrical coupler U2 exports high level
To processor U3, processor U3 control thyristor VS1 shutdown, alarm lamp LED1 goes out, relay J2 is disconnected.
Setting varistor RV resistance value can be connected to voltage 300V, and after tested, the neutral point of voltage transformer secondary side is electric
When pressure value reaches 300V or more, alarm lamp is bright, and number display display counting adds one.
Setting varistor RV resistance value can be connected to voltage 1000V, and after tested, the neutral point of voltage transformer secondary side is electric
When pressure value reaches 1000V or more, alarm lamp is bright, and number display display counting adds one.
Further, further include RS485 communication module on device, processor can directly by RS485 by pre-warning signal and
When report.
The present invention can effectively prevent and protect the overvoltage of voltage transformer secondary neutral point, and can make in time pre-
It is alert, it reminds operating worker to take care, effectively reduces the probability of accident generation.Device can repeatedly use, save at
This.
The preferable specific embodiment of the above, only the invention patent, but the scope of protection of the patent of the present invention is not
It is confined to this, anyone skilled in the art can readily occur in the technical scope that the invention patent discloses
Change or replacement, should all cover within the scope of protection of the patent of the invention.
Claims (8)
1. a kind of intelligence safety device, is characterized in that, comprising: thyristor, rectifier bridge, varistor, photoelectrical coupler, processing
Device, the anode and cathode of the thyristor connect respectively voltage transformer secondary side neutral point and systematically on, thyristor by
Processor controls turn-on and turn-off；Rectification bridge joint in voltage transformer secondary neutral point and systematically between, rectifier bridge
DC output end series connection varistor is followed by photoelectrical coupler access processor.
2. a kind of intelligent safety device as described in claim 1, it is characterised in that: the anode and cathode of thyristor VS1 connects
Voltage transformer secondary neutral point and systematically between, the control electrode of thyristor VS1 is connected to the cathode of thyristor VS2
On；The anode of thyristor VS2 connects silicon-controlled driving photoelectrical coupler U1, the sun connection relay J1 output end of thyristor VS2
One end, relay J1 output end is another to be connected to voltage transformer secondary neutral point；The control electrode access of thyristor VS2 is silicon-controlled
Drive photoelectrical coupler U1；Silicon-controlled driving photoelectrical coupler U1 connection processor U3；Contact relay driving electricity on processor U3
Road and relay J1；The ac output end of voltage transformer secondary side meets rectifier bridge A1, the output end and direct current of rectifier bridge A1
Photoelectric coupling is accessed after output end concatenation protective resistance RX, the varistor RV of the indirect discharge tube G1 of GND1, rectifier bridge A1
The prime of device U2；The other foot of photoelectrical coupler U2 prime with connecing direct current GND1, the rear class collector pin of photoelectrical coupler U2
High level is connect through pull-up resistor, and the rear class emitter pin of photoelectrical coupler U2 meets isolator GND2, after photoelectrical coupler U2
The I/O pin of grade collector pin access processor U3 does signal input part.
3. a kind of intelligent safety device as described in claim 1, it is characterised in that: be further connected on the processor involution by
Button, number display and police instruction is arranged in button, involution mode.
4. a kind of intelligent safety device as claimed in claim 3, it is characterised in that: it is settable that button is arranged in the involution mode
Automatic resetting mode and hand resetting mode.
5. a kind of intelligent safety device as claimed in claim 3, it is characterised in that: the police instruction includes alarm lamp
And relay signal.
6. a kind of intelligent safety device as claimed in claim 1 or 2, it is characterised in that: the varistor resistance value is adjustable, pressure
The voltage magnitude range that quick resistance RV can be connected is 300V~1000V.
7. a kind of intelligent safety device as described in claim 1, it is characterised in that: further include communication module.
8. a kind of intelligent safety device as claimed in claim 3, it is characterised in that: further include communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910503061.2A CN110212491A (en) | 2019-06-11 | 2019-06-11 | A kind of intelligence safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910503061.2A CN110212491A (en) | 2019-06-11 | 2019-06-11 | A kind of intelligence safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110212491A true CN110212491A (en) | 2019-09-06 |
Family
ID=67791941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910503061.2A Pending CN110212491A (en) | 2019-06-11 | 2019-06-11 | A kind of intelligence safety device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110212491A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078618A (en) * | 2021-03-08 | 2021-07-06 | 珠海润科电力设备有限公司 | PT blocking method and device based on thyristor |
| CN115253530A (en) * | 2022-09-26 | 2022-11-01 | 山西辉能科技有限公司 | Dust recycling and conveying system |
-
2019
- 2019-06-11 CN CN201910503061.2A patent/CN110212491A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113078618A (en) * | 2021-03-08 | 2021-07-06 | 珠海润科电力设备有限公司 | PT blocking method and device based on thyristor |
| CN115253530A (en) * | 2022-09-26 | 2022-11-01 | 山西辉能科技有限公司 | Dust recycling and conveying system |
| CN115253530B (en) * | 2022-09-26 | 2023-01-06 | 山西辉能科技有限公司 | Dust recycling and conveying system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104466900B (en) | A kind of input voltage overvoltage crowbar | |
| CN110212491A (en) | A kind of intelligence safety device | |
| CN202794900U (en) | Wireless on-site device provided with independent input/output | |
| CN106711938A (en) | Leakage protector | |
| CN103104532B (en) | A kind of mining intelligent ventilator controller | |
| CN110112703A (en) | Protect circuit | |
| CN103956714B (en) | A kind of high sensitivity multi-functional CT open-circuit protecting device | |
| CN214754507U (en) | Circuit with timing function and leakage protection plug | |
| CN206099298U (en) | Power supply monitoring circuit | |
| CN205960779U (en) | P type monitoring formula switching power | |
| CN213753969U (en) | Secondary open-circuit protection circuit of current transformer | |
| CN112165071B (en) | Leakage current early warning protection circuit with self-test function | |
| CN210016269U (en) | Intelligent safety device | |
| CN205123418U (en) | Intelligent distribution box | |
| CN210982598U (en) | High-voltage load monitoring circuit based on current detection | |
| CN108418173A (en) | A kind of arc-fault circuit interrupter | |
| CN203352155U (en) | Microcomputer monitoring protecting device for current transformer | |
| CN107689670A (en) | A kind of control circuit of main power supply switching switch | |
| CN208547684U (en) | A kind of portable short-circuit line monitoring device and system | |
| CN209748404U (en) | Three-phase rectification protection circuit with input surge current suppression function | |
| CN106711984A (en) | Anti-surge digital display adjustable power supply device | |
| CN201490709U (en) | Anti-dead halt lightning arrester | |
| CN207339409U (en) | A kind of control circuit of main power supply switching switch | |
| CN208112221U (en) | A kind of protective device of permanent magnet synchronous motor control circuit | |
| CN206248737U (en) | Leakage ensures safety and shows and quality detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |