CN101995839A - Safety-level equipment cabinet monitoring device - Google Patents

Safety-level equipment cabinet monitoring device Download PDF

Info

Publication number
CN101995839A
CN101995839A CN200910249909XA CN200910249909A CN101995839A CN 101995839 A CN101995839 A CN 101995839A CN 200910249909X A CN200910249909X A CN 200910249909XA CN 200910249909 A CN200910249909 A CN 200910249909A CN 101995839 A CN101995839 A CN 101995839A
Authority
CN
China
Prior art keywords
signal
temperature
fan
safety
rack
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.)
Granted
Application number
CN200910249909XA
Other languages
Chinese (zh)
Other versions
CN101995839B (en
Inventor
郭富强
白涛
揭志熹
宋立新
孟广国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China General Nuclear Power Corp
China Techenergy Co Ltd
Original Assignee
China General Nuclear Power Corp
China Techenergy Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China General Nuclear Power Corp, China Techenergy Co Ltd filed Critical China General Nuclear Power Corp
Priority to CN200910249909XA priority Critical patent/CN101995839B/en
Publication of CN101995839A publication Critical patent/CN101995839A/en
Application granted granted Critical
Publication of CN101995839B publication Critical patent/CN101995839B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin

Abstract

The invention discloses a safety-level equipment cabinet monitoring device. The system comprises an equipment cabinet door switch monitoring module, an air blower rotating speed monitoring module, a power supply monitoring module and an equipment cabinet temperature monitoring module, wherein the power supply monitoring module monitors whether a power supply is over-voltage or under-voltage or not; signals obtained by monitoring are isolated or subjected to A/D (Analog to Digital) conversion and then transmitted to a CPLD (Complex Programable Logic Device) for logic processing and analysis, and monitoring results are locally displayed and reported to a main control room by using electric signals. The equipment cabinet monitoring, that is to say, multidirectional monitoring is carried out on an equipment cabinet by combining technologies together; and the safety-level equipment cabinet monitoring device is designed by completely adopting a hardware analog circuit and a logic analog circuit and can be called a non-intelligent unit without a processor or a software program, thus the safety and the reliability are greatly enhanced, and the requirements for nuclear safety standards are met.

Description

A kind of safety-level cabinet monitoring device
Technical field
The present invention relates to cabinet monitoring device, especially a kind of safety-level cabinet monitoring device.
Background technology
The safe level system can make correct response immediately when fortuitous event appears in nuclear power system, make the system and device emergency shut-down, takes place or expansion with the prevention accident, and equipment, the person and Environmental security are produced in protection to greatest extent.The development of nuclear safe level system and commercialization work checking system complexity, test and work for inspection cycle are long, and domestic manufacturer is owing to reasons such as infrastructure investment is big, financial difficulty never make great progress.Current, nuclear power developing must adhere to walking the production domesticization road, break away from the safe level system is subjected to external restriction to become extensive common recognition.If the independent development success of safe level system will improve the scientific and technological level and the manufacturing capacity of China.
Safety-level cabinet monitoring device is the important component part of safe level system, and at present domestic not this device is provided in real time, the state of the rack internal work condition of safe level system accurately.
Summary of the invention
The purpose of this invention is to provide a kind of safety-level cabinet monitoring device, the supervision by to supply voltage in temperature, blower fan, the cabinet in the system cabinet and cabinet door state provides in real time, the state of the rack internal work condition of safe level system accurately.
The technical solution used in the present invention is:
A kind of safety-level cabinet monitoring device of the present invention, described system comprises following monitor module:
Monitor rack door switch module, send a switching value signal during described cabinet door switch, described switching value signal is through isolating or the A/D conversion is transferred to logic processing device and carries out logical process and parsing;
Monitor blower fan module, described detection blower fan module test rotation speed of fan is isolated the rotation speed of fan signal that records or the A/D conversion is transferred to logic processing device and carries out logical process and parsing;
Monitor power module, described power supply adopts redundant power, monitors the whether overvoltage or under-voltage of described redundant power, with described overvoltage or under-voltage signal through isolating or the A/D conversion is transferred to logic processing device and carries out logical process and parsing;
Monitor temperature module, described temperature monitoring adopt thermal resistance to monitor the air themperature at rack air outlet place, and detected temperature signal is divided into two-way, and one the tunnel monitors, judge that cabinet temperature is whether within reliable working range; Another road is gathered and is transmitted, and the concrete numerical value of temperature is reported to master-control room, and master-control room is judged the cabinet temperature state with reference to both results.
Described switching value signal is a cabinet door when opening, and it is logical zero that out gate is opened alerting signal, and rack LED panel Over-The-Counter door display lamp DOR lights simultaneously, and glimmers with fixed frequency; When described switching value signal was the cabinet door pass, it was logical one that out gate closes alerting signal, and rack LED panel Over-The-Counter door pilot lamp DOR extinguishes simultaneously.
The blower fan of described supervision is the two-way blower fan, and when described rotation speed of fan was setting value, output blower fan alerting signal and fault-signal all were logical one, and rack LED panel fan display lamp FAN extinguishes simultaneously; When described rotation speed of fan was lower than setting value, output blower fan alerting signal was a logical zero, and rack LED panel fan display lamp FAN lights simultaneously, and with fixing frequency scintillation; When described rotation speed of fan was lower than setting value, output fan trouble signal was a logical zero, and rack LED panel fan display lamp FAN keeps long bright simultaneously.
Described redundant power is+the 5V redundant power and+the 24V redundant power, described+the 5V redundant power is under-voltage or the overvoltage limits value be its voltage ± 10%, described+the 24V redundant power is under-voltage or the overvoltage limits value be its voltage ± 20%.
When described+5V redundant power when wherein one tunnel+5V surpasses described limits value, described rack turn-offs this road power supply, and the out-put supply alerting signal is a logical zero, simultaneously on the rack LED panel+and the 5V display lamp lights, and glimmers with fixed frequency; When two-way+when the 5V redundant power all exceeded described limits value, the out-put supply fault-signal was a logical zero, simultaneously on the rack LED panel+the 5V display lamp is long bright; When described two-way redundant power was normal value, out-put supply alerting signal and fault-signal were logical one, simultaneously on the rack LED panel+and the 5V display lamp extinguishes.
Described power monitoring adopts monitor IC to carry out under-voltage to power supply and overvoltage monitors.
Described temperature monitoring one tunnel, when the temperature that detects was setting value, output temperature alerting signal and fault-signal all were logical one, temperature display lamp TEM extinguishes on the rack LED panel simultaneously; When the temperature that detects is lower than setting value, the output temperature alerting signal is a logical zero, and temperature display lamp TEM lights on the rack LED panel simultaneously, and glimmers with fixed frequency; When the temperature that detects was lower than setting value, the output temperature fault-signal was a logical zero, and temperature display lamp TEM keeps long bright on the rack LED panel simultaneously.
Described temperature acquisition and transmission of one line are converted into the simulating signal of 4～40mA with temperature signal, are uploaded to the concrete numerical value that master-control room obtains temperature in the rack by after gathering.
Cabinet monitoring among the present invention passes through the supervision of cabinet door switch, blower fan supervision, power monitoring and temperature monitoring, these surveillance technologies are combined rack is carried out multi-faceted supervision, and, this cabinet monitoring device adopts hardware simulation circuit and logical circuit to design non-processor fully, no software program, can be described as non intelligent unit, strengthened its safe reliability greatly, and meet the nuclear safety standard requirement.
Description of drawings
Fig. 1 is the cabinet monitoring device schematic diagram of the cabinet monitoring method of a kind of safety-level cabinet monitoring device of the present invention;
Fig. 2 is the power supply monitoring circuit figure of the cabinet monitoring method of a kind of safety-level cabinet monitoring device of the present invention;
Fig. 3 is the thermal resistance Acquisition Circuit figure of temperature monitoring of the cabinet monitoring method of a kind of safety-level cabinet monitoring device of the present invention;
Fig. 4 is the temperature signal transmission circuit figure of temperature monitoring of the cabinet monitoring method of a kind of safety-level cabinet monitoring device of the present invention.
Embodiment
A kind of cabinet monitoring of safety-level cabinet monitoring device method that provides is provided, monitored object mainly contains the cabinet door switch, two blower fans, two-way redundant power and No. one temperature sensor, the supervisory signal of monitored object is sent into logic processing device CPLD and is carried out logical process and parsing after isolation or A/D conversion, on the one hand monitor message is shown at panel, on the other hand supervisory signal being isolated the back adopts a fixed range value level signal to report output, adopt 0～24V level signal to report output in the present embodiment, wherein-and 3～8V is a logical zero, 16～28V is a logical one.In addition, the temperature monitoring signal is when carrying out the Digital Logic processing, converted the simulating signal of 0～20mA to by the baric flow converter, can collect master-control room by harvester if desired, operating personnel can see the actual temp numerical value of this rack at master-control room.
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
As shown in Figure 1, the cabinet monitoring device schematic diagram of the cabinet monitoring method of a kind of safety-level cabinet monitoring device of the present invention comprises: the door that the cabinet door switch monitors is opened warning, and cabinet door is opened signal and adopted travel switch to design, when the cabinet door switch, can access a switching value signal.When cabinet door was opened, enclosure means was lighted LED panel Over-The-Counter door display lamp DOR, and glimmered with fixing frequency, and to open alerting signal be logical zero to out gate simultaneously; When door closed, rack LED panel Over-The-Counter door pilot lamp DOR extinguished, and door is opened alerting signal and is output as logical one.
The two-way blower fan monitors, supervision to blower fan, enclosure means adopts the blower fan of built-in measurement of rotating speed, when rotating speed was lower than certain setting value, enclosure means was lighted LED panel fan display lamp FAN, and glimmered with fixing frequency, blower fan alerting signal output logic 0, when rotating speed is lower than setting value, it is long bright that rack LED panel fan display lamp FAN keeps, and the fan trouble signal is output as 0; Under the normal situation, when described rotation speed of fan was setting value, rack LED panel fan display lamp FAN extinguished, and fan trouble and alerting signal output all are 1.
Redundant power monitors that enclosure means can monitor that wherein one road redundant power is+5V to the two-way redundant power, and promptly two-way+5V power supply carries out redundancy output, and another road redundant power is+24V that promptly two-way+24V power supply carries out redundancy output.For+the 5V redundant power, this device monitors its power values whether overvoltage or under-voltage ± 10%, if wherein one tunnel+5V surpasses this restriction and surpasses setting value, this road power supply of this device shutoff, panel LED+5V display lamp glimmers power supply alarming signal output logic 0 with fixing frequency; When two-way+5V power source voltage all exceeds restriction, panel LED+5V display lamp is long bright, power failure signal output logic 0; When the two-way redundant power is just often, panel LED+5V is shown as and goes out, power supply alarming and fault-signal output logic 1.For+the 24V redundant power, its supply voltage limited range is ± 20%, if wherein one tunnel+24V surpasses this restriction above setting value, this device turn-offs this road power supply, panel LED+5V display lamp glimmers power supply alarming signal output logic 0 with fixing frequency; When two-way+24V power source voltage all exceeds restriction, panel LED+24V display lamp is long bright, power failure signal output logic 0; When the two-way redundant power is just often, panel LED+24V is shown as and goes out, power supply alarming and fault-signal output logic 1.
Fig. 2 is the power supply monitoring circuit figure of the cabinet monitoring method of safety-level cabinet monitoring device of the present invention, and for the supervision of supply voltage, this device adopts single undervoltage and overvoltage monitor.
As shown in Figure 2, it is 2.3～6V that supply monitor detects the supply voltage scope, if surpass the 6V supply voltage, need connect current-limiting resistance Rz between power supply supply voltage and power supply, makes to pour into power supply supply voltage electric current and be no more than 10mA.
Wherein, R A, R B, R CThree resistance are the upper and lower bounds that are used for adjusting monitoring voltage, and it is as follows that formula specifically is set:
R A = | 0.5 V I n · V n V OV | Formula 1
R ABe used for being provided with overvoltage monitoring door limit value.
R B = | 0.5 V I n · V n V UV | - R A Formula 2
R BBe used for being provided with under-voltage monitoring door limit value.
R c = | V n I n | - R A - R B Formula 3
Referring to Fig. 3, Fig. 3 is the thermal resistance Acquisition Circuit figure of temperature monitoring of the cabinet monitoring method of safety-level cabinet monitoring device of the present invention, this device adopts thermal resistance to monitor the air themperature at rack air outlet place to the supervision of temperature, temperature signal at first is converted into magnitude of voltage to collection for the resistance of thermal resistance, be divided into two-way behind the signal condition, one the tunnel monitors, judges that the cabinet temperature scope is whether within working range reliably; When the temperature that detects was setting value, temperature display lamp TEM extinguished on the rack LED panel, and output temperature alerting signal and fault-signal all are logical one simultaneously; When the temperature that detects is lower than setting value, temperature display lamp TEM lights on the rack LED panel, and with the fixed frequency flicker, the output temperature alerting signal is a logical zero simultaneously; When the temperature that detects is lower than setting value, temperature display lamp TEM keeps long bright on the rack LED panel, and the output temperature fault-signal is a logical zero simultaneously.
Other one the tunnel is used for the concrete numerical value of temperature is reported to master-control room, so carry out becoming after voltage/current V/I changes the current signal of 0～20mA, conveniently gathers.
This device is not high to the accuracy requirement of the collection of thermal resistance, and 1% precision just can satisfy the demands, so when design adopted accurate relatively 3 line value thermal resistances design.The reference source of thermal resistance adopts the form of current source, so that reduce the influence of the interior cabling of rack to acquisition precision.As shown in Figure 3, resistance signal is to the circuit theory of voltage signal conversion.This circuit has been selected integrated differential amplification chip for use.If the resistance of the line of three-way RTD signal is identical, be r, be reference point with the C point, I is a constant, voltage " V (CH+)-V (CH-) " is only determined by the resistance of RTD.Aforementioned calculation shows, as long as the resistance of the line of three-way RTD signal is identical, and V OUTOnly relevant with the resistance of RTD, line resistance is to the not influence of final operation result.So under the equal situation of the line resistance of RTD signal, this circuit can be eliminated the influence of line resistance to measuring accuracy fully.
As shown in Figure 4, the temperature signal transmission circuit figure of the temperature monitoring of the cabinet monitoring method of safety-level cabinet monitoring device of the present invention, the signal Vo that Fig. 3 thermal resistance Acquisition Circuit gained signal is amplified after 100 passes through R INInsert the I of baric flow transmitter IN
The circuit of the current transducer that is made of the baric flow transmitter as shown in Figure 4, is considered as public ground with pin 3, is provided+supply voltage of 2.5V to strain bridge by pin 1.C is a noise reduction electric capacity, VT is outside NPN power tube, when the platinum resistance measured temperature changes, the voltage signal of constant flow source measuring platinum resistance circuit output at first zooms into the input voltage UIN of 0.8～4V through prime amplifier, convert the input current of 40～200mA again by RIN to, amplify the electric current that obtains 4～20mA after 100 times at last.

Claims (8)

1. a safety-level cabinet monitoring device is characterized in that, described system comprises following monitor module:
Monitor rack door switch module, send a switching value signal during described cabinet door switch, described switching value signal is through isolating or the A/D conversion is transferred to logic processing device and carries out logical process and parsing;
Monitor blower fan module, described supervision blower fan module test rotation speed of fan is isolated the rotation speed of fan signal that records or the A/D conversion is transferred to logic processing device and carries out logical process and parsing;
Monitor power module, described power supply adopts redundant power, monitors the whether overvoltage or under-voltage of described redundant power, with described overvoltage or under-voltage signal through isolating or the A/D conversion is transferred to logic processing device and carries out logical process and parsing;
Monitor temperature module, described temperature monitoring module adopt thermal resistance to monitor the air themperature at rack air outlet place, and detected temperature signal is divided into two-way, and one the tunnel monitors, judge that cabinet temperature is whether within reliable working range; Another road is gathered and is transmitted, and the concrete numerical value of temperature is reported to master-control room, and master-control room is judged the cabinet temperature state with reference to both results.
2. a kind of safety-level cabinet monitoring device according to claim 1, it is characterized in that described switching value signal is a cabinet door when opening, it is logical zero that out gate is opened alerting signal, rack LED panel Over-The-Counter door display lamp DOR lights simultaneously, and glimmers with fixed frequency; When described switching value signal was the cabinet door pass, it was logical one that out gate closes alerting signal, and rack LED panel Over-The-Counter door pilot lamp DOR extinguishes simultaneously.
3. a kind of safety-level cabinet monitoring device according to claim 1, it is characterized in that described blower fan is the two-way blower fan, when described rotation speed of fan is setting value, output blower fan alerting signal and fault-signal all are logical one, and rack LED panel fan display lamp FAN extinguishes simultaneously; When described rotation speed of fan was lower than setting value, output blower fan alerting signal was a logical zero, and rack LED panel fan display lamp FAN lights simultaneously, and glimmers with fixed frequency; When described rotation speed of fan was lower than setting value, output fan trouble signal was a logical zero, and rack LED panel fan display lamp FAN keeps long bright simultaneously.
4. a kind of safety-level cabinet monitoring device according to claim 1, it is characterized in that, described redundant power is+the 5V redundant power and+the 24V redundant power, described+the 5V redundant power is under-voltage or the overvoltage limits value be its voltage ± 10%, described+the 24V redundant power is under-voltage or the overvoltage limits value be its voltage ± 20%.
5. according to claim 1 or 4 described a kind of safety-level cabinet monitoring devices, it is characterized in that, when described+5V redundant power when wherein one tunnel+5V surpasses described limits value, described rack turn-offs this road power supply, the out-put supply alerting signal is a logical zero, simultaneously on the rack LED panel+the 5V display lamp lights, and glimmers with fixed frequency; When two-way+when the 5V redundant power all exceeded described limits value, the out-put supply fault-signal was a logical zero, simultaneously on the rack LED panel+the 5V display lamp is long bright; When described two-way redundant power was normal value, out-put supply alerting signal and fault-signal were logical one, simultaneously on the rack LED panel+and the 5V display lamp extinguishes.
6. a kind of safety-level cabinet monitoring device according to claim 5 is characterized in that, described power supply adopts monitor to carry out under-voltage to power supply and overvoltage monitors.
7. a kind of safety-level cabinet monitoring device according to claim 1, it is characterized in that described temperature monitoring one tunnel is when the temperature that detects is setting value, output temperature alerting signal and fault-signal all are logical one, and temperature display lamp TEM extinguishes on the rack LED panel simultaneously; When the temperature that detects is lower than setting value, the output temperature alerting signal is a logical zero, and temperature display lamp TEM lights on the rack LED panel simultaneously, and glimmers with fixed frequency; When the temperature that detects was lower than setting value, the output temperature fault-signal was a logical zero, and temperature display lamp TEM keeps long bright on the rack LED panel simultaneously.
8. a kind of safety-level cabinet monitoring device according to claim 1, it is characterized in that, described temperature acquisition and transmission of one line are converted into the simulating signal of 4～40mA with temperature signal, are uploaded to the concrete numerical value that master-control room obtains temperature in the rack by after gathering.
CN200910249909XA 2009-08-25 2009-12-04 Safety-level equipment cabinet monitoring device Active CN101995839B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910249909XA CN101995839B (en) 2009-08-25 2009-12-04 Safety-level equipment cabinet monitoring device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN200910091563.5 2009-08-25
CN200910091563A CN101656115A (en) 2009-08-25 2009-08-25 Cabinet monitoring system of safety-level cabinet monitoring device
CN200910249909XA CN101995839B (en) 2009-08-25 2009-12-04 Safety-level equipment cabinet monitoring device

Publications (2)

Publication Number Publication Date
CN101995839A true CN101995839A (en) 2011-03-30
CN101995839B CN101995839B (en) 2012-05-30

Family

ID=41710354

Family Applications (2)

Application Number Title Priority Date Filing Date
CN200910091563A Pending CN101656115A (en) 2009-08-25 2009-08-25 Cabinet monitoring system of safety-level cabinet monitoring device
CN200910249909XA Active CN101995839B (en) 2009-08-25 2009-12-04 Safety-level equipment cabinet monitoring device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN200910091563A Pending CN101656115A (en) 2009-08-25 2009-08-25 Cabinet monitoring system of safety-level cabinet monitoring device

Country Status (1)

Country Link
CN (2) CN101656115A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104747485A (en) * 2015-02-16 2015-07-01 溧阳市超强链条制造有限公司 Coal mine ventilator online monitoring and diagnosis device
CN108735321A (en) * 2018-06-22 2018-11-02 江苏核电有限公司 A kind of control loop power supply is in alarm device and its verification method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102571441B (en) * 2012-01-18 2017-03-15 百度在线网络技术（北京）有限公司 Whole machine cabinet intelligent management, system and device
CN103730175B (en) * 2012-10-11 2016-01-27 中广核工程有限公司 A kind of digital backup panel for nuclear power plant
CN112259273B (en) * 2020-09-04 2024-04-09 福建福清核电有限公司 Positioning method for DCS control cabinet flash alarm

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1265220A (en) * 1997-06-06 2000-08-30 Abb燃烧工程核力公司 Digital engineered safety features actuation system
CN101059692B (en) * 2007-04-30 2011-06-01 深圳日海通讯技术有限公司 Integrated monitoring system integration
CN201212952Y (en) * 2007-12-26 2009-03-25 北京奥伦兴达科技有限公司 Intelligent machine cabinet
CN101447240B (en) * 2008-12-22 2012-12-05 中国广东核电集团有限公司 Accident monitor system for nuclear power unit and monitor method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104747485A (en) * 2015-02-16 2015-07-01 溧阳市超强链条制造有限公司 Coal mine ventilator online monitoring and diagnosis device
CN108735321A (en) * 2018-06-22 2018-11-02 江苏核电有限公司 A kind of control loop power supply is in alarm device and its verification method

Also Published As

Publication number Publication date
CN101995839B (en) 2012-05-30
CN101656115A (en) 2010-02-24

Similar Documents

Publication Publication Date Title
CN104716741B (en) Transformer station's remote supervision system and remote monitoring method thereof
CN203241494U (en) Direct current system AC series current fault and insulation fault monitoring line-selection apparatus
CN101995839B (en) Safety-level equipment cabinet monitoring device
CN103135038A (en) Alternative current electric crosstalk and insulation fault monitoring line selection method of direct current system
CN115459448A (en) Switch cabinet latent fault diagnosis early warning detection system and method
CN208570129U (en) A kind of digitlization Nuclear Instrument RPN system
CN207074246U (en) A kind of GIS partial discharge on-line monitoring system
Ojo et al. Design and Implementation of a GSM-based Monitoring System for a Distribution Transformer
CN104931798B (en) The source range impulsive measurement device and its detection localization method of out-pile Nuclear Instrument system
CN207215977U (en) A kind of switchgear Intelligent Measurement terminal
CN201364482Y (en) Integrated measurement, monitoring alarm and control system
CN219458750U (en) Energy storage power distribution monitoring system and energy storage power distribution cabinet
CN104330762B (en) Line fault detection circuit for current transformer
CN205942981U (en) Multi -parameter temperature measurement formula alarm and control system for electric fire prevention
CN204101934U (en) A kind of absorption type temperature of oil in transformer monitoring alarm device
CN110854827B (en) Protection system of direct current residual current circuit breaker
CN207410005U (en) A kind of energy saving power grid measure voltage ＆ current protective device
CN113433924A (en) Remote diagnosis system and method for medium-frequency electric furnace
CN202994298U (en) Automatic working-temperature detecting and warning device for rectifier
CN207731128U (en) A kind of protection transmission auxiliary system of electrical secondary equipment
CN110518547A (en) A kind of high precision collecting direct current protecting devices and methods therefor
CN206930732U (en) A kind of electric power electric safe distribution of electric power detection means of anticreep auto-alarm function
CN206740276U (en) A kind of power distribution cabinet temperature detection warning device
CN208966370U (en) A kind of automatic detection warning breaker device in high methane tunnel
CN103675943B (en) Substation personnel location monitor

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee
CP01 Change in the name or title of a patent holder

Address after: 100084 No. 1, Nongda South Road, No. 9, bright city, Silicon Valley, Beijing, Haidian District

Patentee after: Beijing Guangli Nuclear Power Co., Ltd.

Patentee after: China General Nuclear Power Corporation

Address before: 100084 No. 1, Nongda South Road, No. 9, bright city, Silicon Valley, Beijing, Haidian District

Patentee before: Beijing Guangli Nuclear Power Co., Ltd.

Patentee before: China Guangdong Nuclear Power Group Co., Ltd.