CN206002632U - A kind of electric distribution network overhead wire fault detect instruction device - Google Patents
A kind of electric distribution network overhead wire fault detect instruction device Download PDFInfo
- Publication number
- CN206002632U CN206002632U CN201620918998.8U CN201620918998U CN206002632U CN 206002632 U CN206002632 U CN 206002632U CN 201620918998 U CN201620918998 U CN 201620918998U CN 206002632 U CN206002632 U CN 206002632U
- Authority
- CN
- China
- Prior art keywords
- electric capacity
- module
- pin
- pins
- diode
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The utility model discloses a kind of electric distribution network overhead wire fault detect instruction device, including power management module, current break detection module, all-wave cascade sampling module, RF communication module and indicating module；Power management module, current break detection module, all-wave cascade sampling module, RF communication module are all connected with MCU module respectively with indicating module, and current break detection module is also connected with power management module.The beneficial effects of the utility model are：Solve the problems, such as redundant electrical power management of charging and discharging, improve power-efficient, extend redundant electrical power charge lifetimes；Analysis circuit all-wave situation, cascade sampling, decrease the impact to sampling precision for the incidental error；Using LoRaTMModulation system, solves the problems, such as that conventional wireless telecommunications adopt the RF communication distance of 433MHz near, unstable.
Description
Technical field
The present invention relates to distribution line failure detection field, especially one kind are applied to electric distribution network overhead wire load prison
Survey, fault detect, the special accident indicator of fault location.
Background technology
Fault detector is to mount on overhead transmission line, detects circuit load current, detection short circuit, earth fault, is given
Board turning, flashing light instruction；Meanwhile, the track data detecting, fault message are uploaded to power supply monitoring department by it, help power supply section
Door finds rapidly trouble point, shortens power off time, thus improving power supply reliability.
In prior art, there are various problems in fault detector, for example：Circuit power taking electric current is unstable and scope is big, does not have
Redundant electrical power charge and discharge are had to manage, power-efficient is low, has a strong impact on redundant electrical power charge lifetimes；Commonly used half-wave sampling, no
Energy analysis circuit all-wave situation, current sample scope is too wide, and incidental error affects too big on sampling precision；Wireless telecommunications frequently with
The RF communication of 433MHz, apart near and unstable.
Content of the invention
The technical problem to be solved is, provides a kind of electric distribution network overhead wire fault detect rational in infrastructure
Instruction device, can be very good to solve the problems such as circuit power taking electric current is unstable, power-efficient is low, sampling precision is poor.
For solving above-mentioned technical problem, the present invention provides a kind of electric distribution network overhead wire fault detect instruction device, including
Power management module, current break detection module, all-wave cascade sampling module, RF communication module and indicating module；Power management
Module, current break detection module, all-wave cascade sampling module, RF communication module and indicating module all respectively with MCU module phase
Even, current break detection module is also connected with power management module.
Preferably, power management module include the first electricity taking coil, rectification circuit, modulate circuit, the first electric capacity C1, second
Electric capacity C2, the 3rd electric capacity C3, power management chip PM, super capacitor Super Cap and battery BAT；First electricity taking coil connects
Rectification circuit, rectification circuit connects modulate circuit, and modulate circuit two ends connect the two ends of the first electric capacity C1, the first electric capacity C1 respectively
Connect power management chip PM, electric capacity BAT and super capacitor Super Cap and form a loop, one end connects power management core
Piece PM, the other end is directly grounded, and the second electric capacity C2 and the 3rd electric capacity C3 forms a loop, and one end connects power management chip
PM, the other end is directly grounded, and power supply VCC provides working power for whole device.
Preferably, current break detection module includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance
R4, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the 7th electric capacity C7, the first diode D1, the second diode D2, the 3rd
Diode D3, the 4th diode D4, the 5th diode D5 and the first audion Q1；First resistor R1 and the first diode D1 are successively
It is connected to the colelctor electrode of the first audion Q1；3rd diode D3, the 5th diode D5, the 5th electric capacity C5, the 4th electric capacity
C4 and the 4th diode D4 is sequentially connected the base stage being connected to the first audion Q1；6th electric capacity C6 one end connects the 5th diode
D5, the other end is directly grounded, and 3rd resistor R3 is connected in parallel on the two ends of the 6th electric capacity C6；3rd resistor R3 one end is connected to the 6th electricity
Hold the centre of C6 and the 4th diode D4, the other end is directly grounded；4th resistance R4 one end is connected to the 4th diode D4 and
In the middle of the base stage of one audion Q1, the other end is directly grounded；7th electric capacity C7 one end is connected to the colelctor electrode of the first audion Q1,
The other end is connected to the emitter stage of the first audion Q1；One end of second diode D2 connects MCU, and one end is connected to the one or three pole
The colelctor electrode of pipe Q1.
Preferably, all-wave cascade sampling module include the second sampling coil, the 7th diode D7, the 6th resistance R6, the 7th
Resistance R7, the tenth resistance R10, the 12nd resistance R12, the second audion Q2, the 8th electric capacity C8, the first operational amplifier U1,
Two operational amplifier U2；One end of 7th resistance R7 connects the inverting input of the first operational amplifier U1, and one end is directly grounded,
The normal phase input end of the first operational amplifier U1 connects the inverting input of the second operational amplifier, the first operational amplifier defeated
Go out to terminate ADC_0 end, the 6th resistance R6 one end be connected to the 7th resistance R7 and the first operational amplifier U1 inverting input it
Between, the other end is connected between outfan and the ADC_0 end of the first operational amplifier U1；The outfan of the second operational amplifier U2
Connect ADC_1 end；The normal phase input end of the second operational amplifier U2 is accessed in second sampling coil one end after connecting the tenth resistance R10,
One end connects the 7th diode D7 and connects reference voltage, and the 12nd resistance R12 is connected in parallel on the two ends of the 7th diode D7, the 8th electricity
Hold C8 one end to be connected between the tenth resistance R10 and the normal phase input end of the second operational amplifier U2, the other end is directly grounded.
Preferably, RF communication module selects MJN400/900, and including 14 pins, 1 pin is RF pin, and 2 pins are GND
Pin, 3 pins are MISO pin, and 4 pins are MOSI pin, and 5 pins are NSS pin, and 6 pins are CLK pin, and 7 pins are RST
Pin, 8 pins are DIO0 pin, and 9 pins are DIO1 pin, and 10 pins are NC pin, and 11 pins are DIO3 pin, and 12 pins are
NC pin, 13 pins are GND pin, and 14 pins are VCC pin；One end of 7th electric capacity C7 connects 14 pins, and the other end is grounded；
2 pins are directly grounded, and 13 pins are directly grounded, and 1 pin connects antenna J1.
Beneficial effects of the present invention are：Solve the problems, such as redundant electrical power management of charging and discharging, improve power-efficient, extend
Redundant electrical power charge lifetimes；Analysis circuit all-wave situation, cascade sampling, decrease the impact to sampling precision for the incidental error；Adopt
Use LoRaTMModulation system, solves the problems, such as that conventional wireless telecommunications adopt the RF communication distance of 433MHz near, unstable.
Brief description
Fig. 1 is the single unit system electronic schematic diagram of the present invention.
Fig. 2 is the power management module schematic diagram of the present invention.
Fig. 3 is the current break detection module schematic diagram of the present invention.
Fig. 4 is the all-wave cascade sampling module principle figure of the present invention.
Fig. 5 is the RF communication module schematic diagram of the present invention.
Specific embodiment
As shown in figure 1, a kind of electric distribution network overhead wire fault detect instruction device, dash forward including power management module, electric current
Become detection module, all-wave cascade sampling module and RF communication module；Power management module, current break detection module, all-wave are divided
Level sampling module, RF communication module are all connected with MCU module respectively with indicating module, current break detection module also with power supply pipe
Reason module is connected.
Current break detection module includes first coil, rectification unit and abnormality detecting unit；RF communication module includes leading to
News unit；All-wave cascade sampling module includes the second coil, reference voltage and filter unit；Indicating module includes locally indicating list
Unit.Direct current after rectification unit rectification for the alternating voltage that first coil collects enters power management list through conditioning unit
The first-selected power supply that unit powers as device, charges to super capacitor simultaneously；When line current is little, it is not enough that first coil produces electric energy
During powering to device, power supply turn is switched to super capacitor by Power Management Unit, discharges to maintain device to power by super capacitor,
When super capacitor electric discharge is less than certain threshold value, it is not enough to maintenance equipment and powers, power supply turn is switched to standby by Power Management Unit
Battery is powered；After first coil rectification simultaneously, DC voltage is used for abrupt climatic change：If voltage jump causes current break, cause
The discharge and recharge of three electric capacity C3 and the 4th electric capacity C4, thus producing voltage in the 5th resistance R5, drives NPN type the first audion Q1,
Because the MCU pin that the second diode D2 connects is arranged to internal pull-up, now this pin is pulled low, and forms trailing edge, touches
Send out MCU interruption.Second coil collection AC signal, due to raising so that whole AC wave shape can be by MCU of reference voltage
Internal ADC collects.MCU module passes through RF communication module and the harvester wireless telecommunications of Lora technology, transmission electricity
Stream and breakdown judge information, receive reading and the configuration information of harvester；MCU module controls indicating module to pass through flashing light, rotation
Turn machinery to be indicated fault distinguish on the spot and guide maintainer to fix a breakdown.
As shown in Fig. 2 the power management module structure chart for the present invention.Power management module include the first electricity taking coil,
Rectification circuit, modulate circuit, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, power management chip PM, super capacitor
Super Cap and battery BAT；First electricity taking coil connects rectification circuit, and rectification circuit connects modulate circuit, modulate circuit two ends
Connect the two ends of the first electric capacity C1 respectively, the first electric capacity C1 connects power management chip PM, battery BAT and super capacitor Super
Cap forms a loop, and one end connects power management chip PM, and the other end is directly grounded, the second electric capacity C2 and the 3rd electric capacity C3
One loop of composition, one end connects power management chip PM, and the other end is directly grounded, and power supply VCC carries for each module of whole device
For working power.
Modulate circuit will be smooth for crude after rectification direct current conditioning, circuit is produced simultaneously voltage larger when, to rear
The circuit of level is protected, and the first electric capacity C1 electric capacity smooths voltage in full, and the second electric capacity C2 and the 3rd electric capacity C3 filters and steady
Determine working power VCC.
Power to power management chip PM after the rectified circuit of first electricity taking coil and modulate circuit, as the first electric capacity C1 two
Terminal voltage reaches 80mV-3.3V and can power, 380mV cold start-up internal charge pump, carries MPPT maximum power point tracking MPPT, effectively improves
Power-efficient；Now, internal low-voltage difference linear constant voltage regulator LDO main power source provides regulated power supply VCC to equipment, gives super electricity simultaneously
Hold Super Cap to charge, until being full of.When LDO main power source lose or deficiency after automatically switch to super capacitor or chargeable electricity
Pond, when battery power supply is still not enough, will again handoff to backup battery and powers.
As shown in figure 3, the current break detection module structure chart for the present invention.Current break detection module includes the first electricity
Resistance R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the 7th electricity
Hold C7, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5 and the one or three
Pole pipe Q1；First resistor R1 and the first diode D1 are sequentially connected the colelctor electrode being connected to the first audion Q1；3rd diode
D3, the 5th diode D5, the 5th electric capacity C5, the 4th electric capacity C4 and the 4th diode D4 are sequentially connected and are connected to the first audion Q1
Base stage；6th electric capacity C6 one end connects the 5th diode D5, and the other end is directly grounded, and 3rd resistor R3 is connected in parallel on the 6th electric capacity
The two ends of C6；3rd resistor R3 one end is connected to the centre of the 6th electric capacity C6 and the 4th diode D4, and the other end is directly grounded；The
Four resistance R4 one end are connected in the middle of the 4th diode D4 and the base stage of the first audion Q1, and the other end is directly grounded；7th electricity
Hold the colelctor electrode that C7 one end is connected to the first audion Q1, the other end is connected to the emitter stage of the first audion Q1；Two or two pole
One end of pipe D2 connects MCU, and one end is connected to the colelctor electrode of the first audion Q1.
When the coil is de-energized, the first audion Q1 cut-off, pull-up inside MCU interruption pin.Circuit powered on moment, the 4th electricity
Hold C4 and the 5th electric capacity C5 to charge, electric current flows through 3rd resistor R3 and the 4th resistance forms voltage, and the first audion Q1 turns on,
MCU interruption pin trailing edge interrupts.After circuit is stablized relatively, electric capacity does not recharge, the 5th resistance R5 no pressure reduction, the one or three pole
Pipe Q1 ends, and when circuit is mutated, electric capacity charges, the first audion Q1 conducting, and MCU interruption pin trailing edge produces and interrupts.
As shown in figure 4, the all-wave cascade sampling function structure chart for the present invention.All-wave cascade sampling module includes second and adopts
Line-transect circle, the 7th diode D7, the 6th resistance R6, the 7th resistance R7, the tenth resistance R10, the 12nd resistance R12, the two or three pole
Pipe Q2, the 8th electric capacity C8, the first operational amplifier U1, the second operational amplifier U2；One end of 7th resistance R7 connects the first fortune
Calculate the inverting input of amplifier U1, one end is directly grounded, the normal phase input end of the first operational amplifier U1 connects the second computing
The inverting input of amplifier, the output termination ADC_0 end of the first operational amplifier, the 6th resistance R6 one end is connected to the 7th electricity
Between resistance R7 and the inverting input of the first operational amplifier U1, the other end be connected to the outfan of the first operational amplifier U1 with
Between ADC_0 end；The output termination ADC_1 end of the second operational amplifier U2；Second sampling coil one end connects the tenth resistance R10
Access the normal phase input end of the second operational amplifier U2 afterwards, one end connects the 7th diode D7 and connects reference voltage, the 12nd electricity
Resistance R12 is connected in parallel on the two ends of the 7th diode D7, and the 8th electric capacity C8 one end is connected to the tenth resistance R10 and the second operational amplifier
Between the normal phase input end of U2, the other end is directly grounded.
Second sampling coil is converted to voltage signal through the 12nd resistance R12, and reference voltage 1.25V raises signal voltage,
ADC can gather the complete waveform of signal, facilitates electric current and the suppression of breakdown judge the 7th diode D7 position front end moment, the tenth resistance
R10 and the 8th electric capacity C8 composition low pass filter, after MCU pin AD_CTR opens the second audion Q2, opens super low-power consumption
Amplifier and reference power supply complete to sample.Start the first operational amplifier U1 position forward direction amplifying circuit, the second operational amplifier U2 is
Voltage follower, when voltage is less, ADC_0 channel sample value after amplifying for the sampled signal is defined, when voltage is more than necessarily
When value or entrance dead band, sampled value is defined by ADC_1.
As shown in figure 5, the RF communication module structure chart for the present invention.RF communication module selects MJN400/900, including 14
Individual pin, 1 pin is RF pin, and 2 pins are GND pin, and 3 pins are MISO pin, and 4 pins are MOSI pin, and 5 pins are
NSS pin, 6 pins are CLK pin, and 7 pins are RST pin, and 8 pins are DIO0 pin, and 9 pins are DIO1 pin, 10 pins
For NC pin, 11 pins are DIO3 pin, and 12 pins are NC pin, and 13 pins are GND pin, and 14 pins are VCC pin；7th
One end of electric capacity C7 connects 14 pins, and the other end is grounded；2 pins are directly grounded, and 13 pins are directly grounded, and 1 pin connects antenna
J1.
Wireless telecommunications adopt HexNet wireless module, MJN400/MJN900RF communication module, and it is free that module is operated in ISM
Frequency range, can support 433MHz, 868MHz and 915MHz；Support star-network and Mesh network, automatic network-building, automatically route, exempt from
Go manual maintenance；Park mode can be entered, low in energy consumption；Using LoRaTMModulation system, adapts to the differences such as city, suburb, rural area
Environment；There is spread spectrum, be protected from weather influences；There is the Link Budget of 160dB, can long-distance transmissions.
Although the present invention is illustrated with regard to preferred implementation and has been described, it is understood by those skilled in the art that
Without departing from scope defined by the claims of the present invention, variations and modifications can be carried out to the present invention.
Claims (5)
1. a kind of electric distribution network overhead wire fault detect instruction device is it is characterised in that include：Power management module, electric current are dashed forward
Become detection module, all-wave cascade sampling module, RF communication module and indicating module；Power management module, current break detection mould
Block, all-wave cascade sampling module, RF communication module are all connected with MCU module respectively with indicating module, current break detection module
Also it is connected with power management module.
2. electric distribution network overhead wire fault detect instruction device as claimed in claim 1 is it is characterised in that power management module
Including the first electricity taking coil, rectification circuit, modulate circuit, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, power management
Chip PM, super capacitor Super Cap and battery BAT；First electricity taking coil connects rectification circuit, and rectification circuit connects conditioning electricity
Road, modulate circuit two ends connect the two ends of the first electric capacity C1 respectively, and the first electric capacity C1 connects power management chip PM, electric capacity BAT
Form a loop with super capacitor Super Cap, one end connects power management chip PM, the other end is directly grounded, the second electricity
Hold C2 and the 3rd electric capacity C3 and form a loop, one end connects power management chip PM, the other end is directly grounded, and power supply VCC is
Whole device provides working power.
3. electric distribution network overhead wire fault detect instruction device as claimed in claim 1 is it is characterised in that current break detects
Module include first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 4th electric capacity C4, the 5th electric capacity C5,
Six electric capacity C6, the 7th electric capacity C7, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th
Diode D5 and the first audion Q1；First resistor R1 and the first diode D1 are sequentially connected the collection being connected to the first audion Q1
Electrode；3rd diode D3, the 5th diode D5, the 5th electric capacity C5, the 4th electric capacity C4 and the 4th diode D4 are sequentially connected even
It is connected to the base stage of the first audion Q1；6th electric capacity C6 one end connects the 5th diode D5, and the other end is directly grounded, 3rd resistor
R3 is connected in parallel on the two ends of the 6th electric capacity C6；3rd resistor R3 one end is connected to the centre of the 6th electric capacity C6 and the 4th diode D4,
The other end is directly grounded；4th resistance R4 one end is connected in the middle of the 4th diode D4 and the base stage of the first audion Q1, another
End is directly grounded；7th electric capacity C7 one end is connected to the colelctor electrode of the first audion Q1, and the other end is connected to the first audion Q1
Emitter stage；One end of second diode D2 connects MCU, and one end is connected to the colelctor electrode of the first audion Q1.
4. electric distribution network overhead wire fault detect instruction device as claimed in claim 1 is it is characterised in that all-wave cascade sampling
Module includes the second sampling coil, the 7th diode D7, the 6th resistance R6, the 7th resistance R7, the tenth resistance R10, the 12nd electricity
Resistance R12, the second audion Q2, the 8th electric capacity C8, the first operational amplifier U1, the second operational amplifier U2；7th resistance R7's
One end connects the inverting input of the first operational amplifier U1, and one end is directly grounded, the positive input of the first operational amplifier U1
End connects the inverting input of the second operational amplifier, the output termination ADC_0 end of the first operational amplifier, the 6th resistance R6 mono-
End is connected between the 7th resistance R7 and the inverting input of the first operational amplifier U1, and the other end is connected to the first operation amplifier
Between the outfan of device U1 and ADC_0 end；The output termination ADC_1 end of the second operational amplifier U2；Second sampling coil one end
The normal phase input end of the second operational amplifier U2 is accessed, one end connects the 7th diode D7 linker after connecting the tenth resistance R10
Quasi- voltage, the 12nd resistance R12 is connected in parallel on the two ends of the 7th diode D7, and the 8th electric capacity C8 one end is connected to the tenth resistance R10
And the normal phase input end of the second operational amplifier U2 between, the other end is directly grounded.
5. electric distribution network overhead wire fault detect instruction device as claimed in claim 1 is it is characterised in that RF communication module selects
With MJN400/900, including 14 pins, 1 pin is RF pin, and 2 pins are GND pin, and 3 pins are MISO pin, 4 pins
For MOSI pin, 5 pins are NSS pin, and 6 pins are CLK pin, and 7 pins are RST pin, and 8 pins are DIO0 pin, 9 pins
For DIO1 pin, 10 pins are NC pin, and 11 pins are DIO3 pin, and 12 pins are NC pin, and 13 pins are GND pin, 14
Pin is VCC pin；One end of 7th electric capacity C7 connects 14 pins, and the other end is grounded；2 pins are directly grounded, and 13 pins are direct
Ground connection, 1 pin connects antenna J1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620918998.8U CN206002632U (en) | 2016-08-22 | 2016-08-22 | A kind of electric distribution network overhead wire fault detect instruction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620918998.8U CN206002632U (en) | 2016-08-22 | 2016-08-22 | A kind of electric distribution network overhead wire fault detect instruction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206002632U true CN206002632U (en) | 2017-03-08 |
Family
ID=58198037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620918998.8U Active CN206002632U (en) | 2016-08-22 | 2016-08-22 | A kind of electric distribution network overhead wire fault detect instruction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206002632U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270395A (en) * | 2018-11-09 | 2019-01-25 | 中电装备山东电子有限公司 | A kind of fault detector electric current abrupt climatic change system and fault detector |
| CN109642929A (en) * | 2017-08-25 | 2019-04-16 | 深圳市云中飞网络科技有限公司 | Terminal device and its battery abnormality monitoring method and monitoring system |
-
2016
- 2016-08-22 CN CN201620918998.8U patent/CN206002632U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109642929A (en) * | 2017-08-25 | 2019-04-16 | 深圳市云中飞网络科技有限公司 | Terminal device and its battery abnormality monitoring method and monitoring system |
| CN109270395A (en) * | 2018-11-09 | 2019-01-25 | 中电装备山东电子有限公司 | A kind of fault detector electric current abrupt climatic change system and fault detector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101702526B (en) | Intelligent power supply control device for uranium ore resource exploration | |
| CN105116296A (en) | Special fault indicator for high-voltage power transmission network cable line | |
| CN103269132B (en) | Sensor power supply method and power supply device | |
| CN102374471B (en) | Intelligent wireless fire fighting emergency lamp | |
| CN102288878A (en) | Fault monitoring system for aerial distribution line | |
| CN206002632U (en) | A kind of electric distribution network overhead wire fault detect instruction device | |
| CN103698590A (en) | Real-time voltage monitor device of 10KV power distribution network | |
| CN207924054U (en) | A kind of fault detector | |
| CN110855013A (en) | Intelligent constant display power monitoring device and control method thereof | |
| CN205193206U (en) | Built on stilts type fault indicator system | |
| CN205881107U (en) | Dewfall alarm | |
| CN110417103A (en) | Power-supply management system and its design method applied to transmission line malfunction indicator | |
| CN205027858U (en) | Special fault indicator of high -tension transmission net cable run | |
| CN202218455U (en) | Single light control device used for urban lighting | |
| CN209624807U (en) | A kind of low-power consumption meteorology real-time monitoring device for supporting more communication channels | |
| CN109546730B (en) | Transient wave recording type fault indicator and power supply method thereof | |
| CN204988543U (en) | Wireless temperature collection device of solar energy power supply | |
| CN106707368A (en) | Novel power supply mode power transmission line environment meteorological monitoring device | |
| CN109406947A (en) | A kind of explosion-proof type intelligent trouble indicator | |
| CN206223901U (en) | A kind of fuse on-line monitoring system | |
| CN210957918U (en) | Intelligent constant display power monitoring device | |
| CN201499006U (en) | Power supply for on-line monitoring system of transmission line | |
| CN113721108A (en) | Acquisition equipment, low-power-consumption control method and transient recording type fault indicator | |
| CN108254021A (en) | A kind of power transmission line dynamic capacity increase monitoring device under Internet of Things framework | |
| CN207730877U (en) | A kind of transient state recording type distribution line failure indicator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |