CN208421193U - Direct current monitoring alarm is scurried into a kind of exchange of simple type - Google Patents
Direct current monitoring alarm is scurried into a kind of exchange of simple type Download PDFInfo
- Publication number
- CN208421193U CN208421193U CN201820758845.0U CN201820758845U CN208421193U CN 208421193 U CN208421193 U CN 208421193U CN 201820758845 U CN201820758845 U CN 201820758845U CN 208421193 U CN208421193 U CN 208421193U
- Authority
- CN
- China
- Prior art keywords
- direct current
- exchange
- alarm
- human
- scurried
- 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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model relates to a kind of exchanges of simple type to scurry into direct current monitoring alarm, it is mainly made of components such as mainboard, human-computer dialogue panel, power module, warning output systems, mainboard is with human-computer dialogue panel, power module, warning output system using electrical connection.Mainboard is an integrated form printed circuit board, and complete correlation function by the chip AD574 and chip AT89C51 of circuit board layout: human-computer dialogue panel is made of digital display tube, warning light and key.The device can scurry into the 220V direct current system of direct current warning function the amplitude for being used to exchange in real-time monitoring transformer station direct current system and scurrying into voltage without exchange --- when voltage magnitude is scurried into exchange is more than the alarm parameters value of setting, device provides alarm signal, finds in time convenient for substation's operation maintenance personnel and disposes the case where direct current is scurried into exchange.The device has many advantages, such as that safe and reliable, applied widely, installation is simple.
Description
Technical field
The utility model relates to a kind of electrical measuring instrument, specifically one kind can be used to monitoring substation direct current system
The instrument of alternating voltage amplitude is scurried into system.
Background technique
It is very harmful, it is possible to cause false protection, cause when DC Line Fault is scurried into transformer station direct current system generation exchange
Large area blackout." 18 great anti-accident measures of power grid of State Grid Corporation of China " (the 5.1.1.18 articles of revised edition) rule
Fixed: " preventing that DC Line Fault appearance is scurried into exchange ", " original D.C. isolation monitoring device should be gradually transformed, and have it
The survey note and warning function of DC Line Fault are altered in exchange ", China's " DC power system insulation monitoring device technology formulated in 2014
Condition " regulation: " when electric fault is altered in the exchange that virtual value 10V or more occurs for direct current system, product should be able to issue exchange and alter electricity
Fault warning information, and show the amplitude for scurrying into alternating voltage ".
In power grid used at present, before 2014 in the DC equipment of factory, does not all have exchange generally and scurry into direct current
Warning function, and these equipment can also run the longer time limit in power grid, for this purpose, how simply to be changed to such equipment
It makes, can have warning function to meet when direct current is scurried into exchange, it has also become the thing being imminent.
Summary of the invention:
The purpose of this utility model is that: a kind of exchange of simple type is provided and scurries into direct current monitoring alarm, device peace
It is used in the 220V direct current system for scurrying into direct current warning function without exchange, can be used to hand in monitoring substation direct current system
Flee into voltage magnitude, when alternating voltage, which scurries into amplitude, is more than the alarm parameters value of setting, capable of emitting alarm signal.
The utility model is realized in this way:
Direct current monitoring alarm is scurried into the simple type exchange of the utility model, mainly by mainboard, human-computer dialogue panel, electricity
Source module, warning output system composition.Mainboard and human-computer dialogue panel, power module, circuit connection between warning output system.
In a rectangular parallelepiped shape, mainboard is in bottom to the device overall appearance, and human-computer dialogue panel is located at front, power module,
Warning output system is located at top at device backboard.
Mainboard is an integrated form printed circuit board, samples skill using currently used SCM Based ac digital
Art mainly measures to input quantity and completes the processing of correlation function.
The mainboard belongs to prior art, and the chip AD574 and chip AT89C51 for relying primarily on circuit board layout complete phase
Close function: the main function of chip AD574 is to the measured carry out AC sampling by attenuator circuit processing, chip
AT89C51 handles the of ac collected, sequential operation and drives digital display tube real-time display, while by the reality
When alternating voltage amplitude compare with the alarm parameters value of setting: when real-time alternating voltage amplitude is greater than the alarm parameters value of setting
When, alarm output module outputting alarm contact is controlled, while lighting the warning light on human-computer dialogue panel.
Human-computer dialogue panel is mainly used for display exchange and scurries into amplitude and adjust to alarm parameters, aobvious by number
Show pipe, warning light and key composition, is connected respectively with mainboard by circuit, complete respective function: these three components are respectively mounted
On the front panel of device.
The power module: its function is that the installation's power source of input is become to DC5V, DC9V, DC24V DC power supply, is supplied
LED charactrons, mainboard etc. use.
The alarm output module: its function is completed by two HT3F type relays, passive idle contact is exported, for substation
Remote motion signal, which uploads, to be used.
When the present apparatus is installed and used at the scene, direct current positive and negative busbar is respectively connected to using two covering devices.The advantages of device
It is: avoids because meter internal fault (such as heating burnout) leads to DC bus intereelectrode short-circuit, meter internal fault maximum shadow
It rings to cause DC bus monopole to be grounded.
The working principle of the utility model is:
Mainboard carries out digital sample to the direct current input quantity containing AC compounent and calculates exchange after digital filtering
Voltage magnitude, and the alternating voltage amplitude is shown by digital display tube --- for being exchanged in monitoring substation direct current system
Scurry into voltage magnitude.Since utility model works power supply is AC 70V-260V (DC 70V-360V), what is be measured is defeated
Entering amount can simultaneously serve as installation's power source.In use, scurrying into direct current monitoring alarm using two sets of exchanges, it is respectively connected to 220V
Direct current system positive and negative busbar, by measurement input terminal and installation's power source terminal and tie.Voltage alarm parameter is scurried into exchange
Key adjusting can be used in value, may be configured as 10V under normal circumstances.
The advantages of device, is:
Direct current monitoring alarm is scurried into the exchange, can be in the 220V direct current system for scurrying into direct current warning function without exchange
It uses.It is all that phase line scurries into anode or negative electrode bus, and exchanges in the positive and negative interpolar phase of direct current system that general AC power source, which is scurried into,
When in short circuit, i.e., positive and negative anodes bus scurry into alternating voltage must be equal.It is more than setting that the present apparatus, which scurries into amplitude when alternating voltage,
When alarm parameters value, alarm signal can be issued, two meter Sample AC amounts can be easily compared under normal circumstances,
If which meter exception, can find rapidly.After direct current a certain pole ground connection, ungrounded pole meter can be operated normally.
Meanwhile avoiding because meter internal fault (such as heating burnout) leads to DC bus intereelectrode short-circuit, when meter internal fault most
Big to influence to cause DC bus monopole to be grounded, direct current system can continue to run at this time.
The device has many advantages, such as safe and reliable, high-efficient, applied widely, easy to carry, preferably solves following
Problem:
One, it after for of ac acquisition is extracted in direct current system, is directly shown, can be monitored at any time by digital display tube
Voltage magnitude is scurried into exchange in transformer station direct current system；
Two, when exchange scurries into direct current system voltage magnitude and is more than the alarm parameters value of setting, outputting alarm contact immediately, and
The warning light on human-computer dialogue panel is lighted, is found in time convenient for operations staff and dispatching and monitoring personnel；
Three, the installation mode of connection, which avoids meter internal fault (such as heating burnout), leads to DC bus intereelectrode short-circuit, when
When direct current monitoring alarm internal fault is scurried into this exchange, biggest impact is to cause DC bus ground connection without influencing substation
Interior equipment continues to run.
With reference to the accompanying drawings and examples, the utility model is described further.
Detailed description of the invention
The overall construction schematic diagram of direct current monitoring alarm is scurried into the exchange of Fig. 1, the utility model embodiment
The human-computer dialogue panel schematic diagram of direct current monitoring alarm is scurried into the exchange of Fig. 2, the present embodiment
The backboard schematic diagram of direct current monitoring alarm is scurried into the exchange of Fig. 3, the present embodiment
What direct current monitoring alarm was scurried into the exchange of Fig. 4, the present embodiment installs and uses schematic illustration.
Specific embodiment
Direct current monitoring alarm is scurried into embodiment 1, a kind of exchange of simple type
Fig. 1 shows the overall structure of the present embodiment, mainly by mainboard, human-computer dialogue panel, power module, warning output
System composition.The radial same human-computer dialogue panel of mainboard, power module, the electrical connection of warning output system.The device is whole outer
Seeing is in cuboid, and mainboard is in bottom, and human-computer dialogue panel is located at front, and power module, warning output system are leaned on positioned at top
At device backboard.
Fig. 2 shows the construction of the present embodiment human-computer dialogue panel (i.e. device front panel)
The man-machine dialog panel be equipped on the front of device, the front panel of device digital display tube, warning light and
Key.Wherein, 4 LED digital display tubes (component of " 8 " is shown as in figure) show real-time collected exchange by mainboard
Voltage value；Warning light (i.e. in figure " J1 " " J2 " number side rectangle component), alternating voltage amplitude be more than setting
Alarm parameters value when light --- for prompting operation maintenance personnel DC bus to there is exchange to scurry into.There are four key is total, surface point
Symbol " SET ", " > ", " ∧ ", " ∨ " are not indicated, and for setting alarm parameters: " SET " for setting and confirming, " > " is used for
It is moved to the left selection setting position, " ∧ " for parameters number increase when setting, " ∨ " is for parameters number reduction when setting.
Fig. 3 shows the construction of the present embodiment backboard
Wherein terminal 1,2 access device power supplys；Terminal 6,10 accesses tested power supply；Terminal 3 is device ground connection；Terminal 19,
20 be a pair of of alarm normal opened contact, is opened under normal circumstances, when closure when amplitude is more than the alarm parameters value of setting is scurried into exchange.
Fig. 4 shows the installation connection principle that the present embodiment is applied in actual DC system
1. two present apparatus are fixed on protection screen tapping when installation, backboard connecting terminal is as shown in figure 4, use
2.5mm2Line is shorted No. 1 and No. 6, No. 2 and No. 10 connecting terminals, and No. 3 terminals use 2.5mm2Yellowish green alternate line is connected to protection screen
At cabinet ground connection, No. 2 terminals use 4mm2Yellowish green alternate line is connected at insulating monitor ground connection, No. 1 terminal mistake of two devices
It is respectively connected to after being spaced apart on positive and negative anodes DC bus.
It is 10V that alarm parameters value, which is arranged, by panel button, and normal opened contact of being alarmed (terminal 19 and terminal 20) is respectively
Extraction is connected to transformer station measurement and control device and opens, and uploads backstage and scheduling telemechanical end.
2. when normal, two device digital display tubes show ac voltage close to zero and numerical value differs smaller；Work as phase
When difference data is excessive, it was demonstrated that a certain device has exception, needs to verify the device；Scurrying into voltage when exchange is more than
When 10V, two device digital display tube display actual measurement ac voltages, while panel J1 alarm lamp is lighted, normal opened contact of alarming
(terminal 19 and terminal 20) closure, backstage and scheduling telemechanical end receive exchange and scurry into direct current alarm signal.
Direct current monitoring alarm is scurried into the exchange of the present embodiment, and main specifications parameter is as follows:
1. working power: AC 70V-500V (DC 70V-360V)
2. ac voltage measurement range: AC 0-500V
3. working environment: 0-40 DEG C of relative humidity < 80%
4. measurement accuracy: 1.0%+5d
5. apparent size: long 95mm* wide 45mm* high 80mm.
Claims (3)
1. direct current monitoring alarm is scurried into a kind of exchange of simple type, it is characterised in that: mainly by mainboard, human-computer dialogue panel,
Power module, alarm output module composition, mainboard between human-computer dialogue panel, power module, warning output system to be electrically connected
It connects；
The mainboard is an integrated form printed circuit board, complete by the chip AD574 and chip AT89C51 of circuit board layout
At correlation function: that is, the DC quantity containing AC compounent to input samples, after carrying out digital filtering, calculating exchange
Component of voltage amplitude；Real-time alternating voltage amplitude is exported and digital display tube is driven to show；Real-time alternating voltage amplitude is same
The alarm parameters value of setting compares, and controls alarm output module outputting alarm contact, while lighting the announcement on human-computer dialogue panel
Warning lamp；
The human-computer dialogue panel, is made of digital display tube, warning light and key, and digital display tube shows collected in real time
Ac voltage；Warning light is lighted when the alternating voltage amplitude scurried into is more than the alarm parameters value of setting, for prompting O&M
Personnel's DC bus has exchange to scurry into；Key is for setting alarm parameters value；
The power module, input power is become DC5V, DC9V, DC24V DC power supply to be made for human-computer dialogue panel, mainboard
With；
The alarm output module is made of two HT3F type relays, passive idle contact is exported, on substation's remote motion signal
It passes and uses.
2. direct current monitoring alarm is scurried into exchange according to claim 1, it is characterised in that: the device overall appearance is in length
Cube shape, mainboard are in bottom, and human-computer dialogue panel is located at front, and power module, warning output system are located at top by device
At backboard.
3. direct current monitoring alarm is scurried into exchange according to claim 1, it is characterised in that: the digital display tube is 4
A LED digital display tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820758845.0U CN208421193U (en) | 2018-05-14 | 2018-05-14 | Direct current monitoring alarm is scurried into a kind of exchange of simple type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820758845.0U CN208421193U (en) | 2018-05-14 | 2018-05-14 | Direct current monitoring alarm is scurried into a kind of exchange of simple type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208421193U true CN208421193U (en) | 2019-01-22 |
Family
ID=65115178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820758845.0U Active CN208421193U (en) | 2018-05-14 | 2018-05-14 | Direct current monitoring alarm is scurried into a kind of exchange of simple type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208421193U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030046A (en) * | 2019-12-18 | 2020-04-17 | 中石大蓝天(青岛)石油技术有限公司 | Multi-source mutual-feed wide-input direct-current overvoltage protector |
-
2018
- 2018-05-14 CN CN201820758845.0U patent/CN208421193U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030046A (en) * | 2019-12-18 | 2020-04-17 | 中石大蓝天(青岛)石油技术有限公司 | Multi-source mutual-feed wide-input direct-current overvoltage protector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101576595B (en) | Online monitoring and electricity testing method of switch cabinet lightning arrester and device for realizing same | |
| WO2015032343A1 (en) | Testing system of gis electronic mutual inductor and method therefor | |
| CN104793132B (en) | Disconnecting switch contact condition detection device and detection method based on electric-field sensor | |
| CN103779967B (en) | For TT&C system and the observing and controlling module thereof of distribution power automation terminal | |
| CN102891533B (en) | A kind of 800kV intelligent breaker | |
| CN203011907U (en) | Portable-type ozone detection device for electrical switch cabinet | |
| CN103487679A (en) | AIS electronic transformer testing system and testing method thereof | |
| CN202837423U (en) | Wireless GPRS wind power power grid electric energy quality detection device based on DSP and ARM | |
| CN109470914A (en) | A kind of VFTO signal measurement apparatus | |
| CN202455006U (en) | Intelligent low-voltage distribution box | |
| CN208421193U (en) | Direct current monitoring alarm is scurried into a kind of exchange of simple type | |
| CN109307851A (en) | A kind of voltage transformer error on-line calibration device | |
| CN203502581U (en) | AIS electronic transformer test system based on disconnecting switch switching-on and switching-off capacitive small current | |
| CN203444008U (en) | High-voltage charge display locking device | |
| CN209374937U (en) | Power distribution cabinet monitoring terminal and power distribution cabinet | |
| CN209561923U (en) | Intelligent railway weak electric system power lightning protection distribution device | |
| CN204719085U (en) | A kind of electric energy quality test device being applicable to underground coal mine low voltage electric network | |
| CN102565614B (en) | Alternating voltage loop test method | |
| CN203324432U (en) | Novel insulation online monitoring system for high-voltage capacitive electrical equipment | |
| CN103777057A (en) | True-root-mean-square capacitive current tester | |
| CN206541018U (en) | A kind of multipoint grounding seeking instrument of voltage transformer | |
| CN206362900U (en) | Power frequency and Transient Electromagnetic environment are to switching the performance study system of secondary monitoring device | |
| CN205544591U (en) | Power station monitoring system is joined in marriage to touch -sensitive screen | |
| CN103762516A (en) | Externally-connected type ozone synchronous detection device for switch cabinets and application of externally-connected type ozone synchronous detection device for switch cabinets | |
| CN108802579A (en) | A kind of system for monitoring ring main unit on-line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |