KR20150027591A - Emergency stop apparatus for scada system - Google Patents

Emergency stop apparatus for scada system Download PDF

Info

Publication number
KR20150027591A
KR20150027591A KR20130106216A KR20130106216A KR20150027591A KR 20150027591 A KR20150027591 A KR 20150027591A KR 20130106216 A KR20130106216 A KR 20130106216A KR 20130106216 A KR20130106216 A KR 20130106216A KR 20150027591 A KR20150027591 A KR 20150027591A
Authority
KR
South Korea
Prior art keywords
signal
emergency stop
output
controller
field device
Prior art date
Application number
KR20130106216A
Other languages
Korean (ko)
Inventor
강려려
Original Assignee
엘에스산전 주식회사
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 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to KR20130106216A priority Critical patent/KR20150027591A/en
Publication of KR20150027591A publication Critical patent/KR20150027591A/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/24—Pc safety
    • G05B2219/24215—Scada supervisory control and data acquisition
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Geophysics (AREA)
  • Automation & Control Theory (AREA)
  • Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

The present invention provides an emergency stop apparatus for a remote supervisory system capable of improving safety by emergently stopping a site apparatus by automatically detecting vibration or movement by a natural disaster such as an earthquake without delay. According to the present invention, the emergency stop apparatus for a remote supervisory system comprises an accelerator sensor to output an electric signal corresponding to detection of movement or vibration including an earthquake and a controller to determine emergency stop of a site apparatus by processing the electronic signal from the accelerator sensor via a pre-stored processing program when movement or vibration, which exceeds an available level of the vibration or the movement, is generated and to output an emergency stop order signal to the site apparatus.

Description

[0001] EMERGENCY STOP APPARATUS FOR SCADA SYSTEM FOR REMOTE MONITORING SYSTEM [0002]

The present invention relates to a supervisory control and data acquisition system (abbreviated as a SCADA system in general), and more particularly, to a remote control system capable of detecting vibration or movement due to a natural disaster such as an earthquake, And an emergency stop device for a surveillance system.

The configuration and operation of the emergency stop device for the remote monitoring system according to the prior art will be described with reference to FIG.

1, the emergency stop device for a remote monitoring system according to the related art includes a user interface unit 10, a database 20, an optical signal transmitter 30, A receiver 40, a controller 50, a digital input / output unit 60, and an emergency stop button 80.

In FIG. 1, reference numeral 70 designates a field device to be monitored by the remote monitoring system.

The user interface unit 10 is a device that enables a user to access the remote monitoring system and the field device 70 so that the user can cause the field device 70 to be stopped in an emergency when a vibration or movement due to a natural disaster such as an earthquake occurs For example, a keyboard of the personal computer may be configured as the user interface unit 10, and a display device such as a monitor showing the access status of the emergency stop device to the user may be included in the user interface unit 10.

The database 20 is a part for storing current state data of the field device 70 or command data to be output to the field device 70 (for example, command data for emergency stop of the field device) A memory such as a hard disk of a server computer and a data input / output unit by a remote monitoring system operation program. The database 20 and the user interface unit 10 can be communicatively connected to each other by a communications driver program and a communication path between the devices of the personal computer.

The optical signal transmitter 30 is a so-called communication hub which is accessed by the user through the user interface unit 10 and outputs command data for emergency stop of the field device 70 issued by the data base 20 (Local ethernet Lan) or optical fiber (Opticalfiber) signal line. The optical signal transmitter 30 and the data base 20 can be connected to a local Ethernet local area network.

Here, the user interface unit 10, the database 20, and the optical signal transmitter 30 constitute an upper supervisory part among the emergency stop devices of the remote monitoring system.

The optical signal receiver 40 is a slave of the emergency stop device of the prior art surveillance system and is connected to the field device 70 (field controller) 50 together with a controller (field controller) 50, a digital input / output section 60 and an emergency stop button 80 ). The optical signal receiver 40 receives the signal having the command data from the upper supervisor including the command data for emergency stop of the field device 70 and provides it to the controller (field controller) 50. The optical signal receiver 40 is connected to the optical signal transmitter 30 of the upper monitoring section through a local Ethernet LAN or optical fiber signal line and is connected to the optical signal receiver 40 and the controller 50 ) May be communicatively connected via a local Ethernet local area network.

The controller 50 is installed close to the field device 70 as a field controller. Upon receipt of the signal with the command data to emergency stop the field device 70 from the optical signal receiver 40 via the local Ethernet local area network, the controller 50 processes it by the embedded processing program, And outputs a control output signal instructing the control unit 70 to stop in an emergency.

The output terminal of the controller 50 is connected to the digital input / output unit 60 through a fieldbus cable, which is an industrial protocol signal line.

The digital input / output unit 60 is connected to the controller 50 through a field bus signal line, and is connected to the field device 70 through a signal line.

Upon receiving the control output signal instructing the controller 50 to perform an emergency stop, the digital input / output unit 60 transmits the control output signal to the field device 70 via the signal line to stop the field device 70.

The emergency stop button 80 may be integrally attached to the field device 70 or may be provided to be electrically connected to the field device 70 at a position adjacent to the field device 70. [ Emergency stop button 80 may be provided as a means for generating a command signal to cause the user to directly stop the field device 70 in the event of a vibration or movement due to a natural disaster such as an earthquake.

The operation of the emergency stop device for the remote monitoring system according to the related art as described above will be described.

First, when the user vibrates or moves due to a natural disaster such as an earthquake, the user stops the on-site device 70 through the user interface unit 10 of the upper monitoring panel, which is remote from the on- The operation for emergency stopping the device 70 will be described.

The user operates the user interface unit 10 to access the database 20 and emulates the field device 70 to be output to the field device 70 based on the previously stored remote monitoring system operation program and command data And outputs command data.

The optical signal transmitter 30 connected to the database 20 through the local Ethernet local area network accesses the user through the user interface unit 10 and transmits the on-site device 70 The command data for emergency stop is transmitted through a local Ethernet LAN or an optical fiber signal line.

Then, the optical signal receiver 40 connected to the optical signal transmitter 30 via the local Ethernet local area network or the optical fiber signal line receives the signal having the command data for emergency stop the field device 70, Controller 50).

The controller 50 communicatively connected to the optical signal receiver 40 via the local Ethernet local area network transmits a control command for instructing the field device 70 to be stopped via the digital input / output unit 60 connected via the field bus signal line And outputs the output signal, and in response, the field device 70 completes the operation by emergency stop.

Next, in order to allow the user to emergency stop the field device 70 in the event of a vibration or movement due to a natural disaster such as an earthquake, the field device 70 is set to the emergency state using the emergency stop button 80 adjacent to the field device 70 The operation of stopping will be described.

When the user is in the vicinity of the field device 70 in the event of a vibration or movement due to a natural disaster such as an earthquake, the user presses the emergency stop button 80 to generate a command signal to directly stop the field device 70.

Thus, the operation is completed when the field device 70 responds to the emergency stop.

However, the emergency stop device for the remote monitoring system according to the related art has the following problems.

There is no guarantee that there is a person who can hold the emergency stop button 80 adjacent to the field device 70 in the event of an emergency.

In addition, a user monitoring through a monitoring device such as one display device of an upper-level system located at a remote location is required to monitor while changing the screen for each of the field devices 70. As a result, There is a considerable chance of missing or late detection of the screen.

In such a case, malfunction or damage of the field device 70 to be monitored by the remote surveillance system may cause serious damage to all the devices and persons living in the vicinity of the field device 70.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a safety device capable of improving safety by emergency stopping a field device by automatically detecting no vibration or movement due to a natural disaster such as an earthquake And an emergency stop device for a remote monitoring system.

The above object of the present invention is also achieved by an emergency stop device for a remote monitoring system for emergency stopping a field device,

An acceleration sensor for outputting a corresponding electrical signal upon sensing vibration or movement including an earthquake; And

A controller for processing an electrical signal from the acceleration sensor by a previously stored processing program to determine an emergency stop of the field device at the time of occurrence of vibration or movement exceeding an allowable vibration or movement level and outputting an emergency stop command signal to the field device side The present invention can be achieved by providing an emergency stop device for a remote monitoring system according to the present invention.

According to a preferred aspect of the present invention, an emergency stop device for a remote monitoring system according to the present invention further comprises a signal adjustment circuit connected between the acceleration sensor and the controller, for adjusting an electric signal from the acceleration sensor .

According to another preferred aspect of the present invention,

And an amplification circuit unit for amplifying and outputting an electric signal output from the acceleration sensor.

According to another preferred aspect of the present invention, the signal adjustment circuit comprises:

An amplification circuit unit for amplifying and outputting an electric signal output from the acceleration sensor; And

A signal regulating circuit connected to an output terminal of the amplifying circuit for adjusting a level by adding or subtracting a predetermined voltage to an electric signal outputted from the amplifying circuit; And

And an analog-to-digital conversion circuit section connected to an output terminal of the signal adjustment circuit, for converting an analog signal output from the signal adjustment circuit into a digital signal.

According to another preferred embodiment of the present invention, the emergency stop device for a remote monitoring system according to the present invention is connected to the controller and the field device so that an output signal of the controller is supplied or blocked And a digital input / output circuit which converts the state output signal from the field device into a digital input signal and provides the digital input signal to the controller.

An emergency stop device for a remote monitoring system according to the present invention comprises an acceleration sensor for sensing vibration or movement including an earthquake and an electric signal from an acceleration sensor by a pre-stored processing program, It includes the controller that determines the emergency stop of the field device in the event of vibration or movement and outputs the emergency stop command signal to the field device side so that it can be detected automatically in case of an emergency situation and the emergency device can be stopped without delay have.

The emergency stop device for a remote monitoring system according to the present invention further comprises a signal adjusting circuit connected between the acceleration sensor and the controller for adjusting an electric signal from the acceleration sensor, So that the possibility that the controller fails to receive the output signal of the acceleration sensor can be minimized.

In the emergency stop device for a remote monitoring system according to the present invention, the signal adjusting circuit includes an amplifying circuit for amplifying and outputting an electric signal output from the acceleration sensor, so that the output signal of the acceleration sensor is weak, It is possible to minimize the possibility of failure in receiving the output signal of the sensor.

In the emergency stop device for a remote monitoring system according to the present invention, the signal adjusting circuit may include: an amplifying circuit unit for amplifying and outputting an electric signal output from the acceleration sensor; Digital conversion circuit section for converting the analog signal outputted from the adjustment circuit section and the adjustment circuit section for adjusting the level by adding or subtracting the analog signal outputted from the acceleration sensor to the digital signal, It is possible to obtain an effect that the controller can accurately receive the output signal of the acceleration sensor.

The emergency stop device for a remote monitoring system according to the present invention converts an output signal of the controller into a digital output signal for instructing interruption control of a switch capable of supplying or disconnecting power of the field device and outputs the digital output signal to the switch, And a digital input / output unit for converting the state output signal from the controller into a digital input signal and providing the digital input signal to the controller, wherein the controller reads the status output signal from the on- Can be performed smoothly.

1 is a block diagram showing a configuration of an emergency stop device for a remote monitoring system according to the related art,
2 is a block diagram showing the configuration of an emergency stop device for a remote monitoring system according to a preferred embodiment of the present invention,
FIG. 3 is a detailed block diagram showing a detailed configuration of a signal conditioning circuit in the emergency stop device for a remote monitoring system according to a preferred embodiment of the present invention,
4 is a flowchart showing an input signal process and a control signal output process of the controller in the emergency stop apparatus for a remote monitoring system according to a preferred embodiment of the present invention.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

2 is a block diagram illustrating a configuration of an emergency stop device for a remote monitoring system according to a preferred embodiment of the present invention.

The emergency stop device for the remote monitoring system according to the preferred embodiment of the present invention may include the acceleration sensor 100 and the controller 50 as shown in the figure.

The acceleration sensor 100 outputs an electric signal corresponding to the amount of vibration or movement as it senses vibration or movement including an earthquake. The acceleration sensor 100 is installed in a position close to the field device 70 for vibration control including earthquake or emergency stop control in accordance with movement.

The controller 50 processes the electrical signal from the acceleration sensor 100 with a pre-stored processing program to determine an emergency stop of the field device 70 in the event of a vibration or movement exceeding an acceptable vibration or movement level, And outputs a stop command signal to the field device 70 side.

The emergency stop apparatus for a remote monitoring system according to the preferred embodiment of the present invention may further comprise a signal adjusting circuit 110 for adjusting an electric signal from the acceleration sensor 100. [

A signal conditioning circuit 110 is connected between the acceleration sensor 100 and the controller 50. The acceleration sensor 100 and the signal adjustment circuit 110 may be connected to each other by electric signal lines so as to transmit and receive electric signals.

3, which is a partial detailed block diagram showing the configuration of the signal adjustment circuit in detail, the signal adjustment circuit 110 may include an amplification circuit portion 110a.

The amplification circuit unit 110a amplifies and outputs the electric signal output from the acceleration sensor 100. [

According to a preferred aspect of the present invention, the signal adjustment circuit 110 may be configured to further include an adjustment circuit portion 110b and an analog-to-digital conversion circuit portion 110c.

The adjustment circuit part 110b is a circuit part connected to the output terminal of the amplification circuit part 110a and for adjusting the level by adding or subtracting a predetermined voltage to the electric signal outputted by the amplification circuit part 110a. The adjusting circuit portion 110b may be configured to include a constant voltage circuit portion and an adder or a subtracter.

The analog-to-digital conversion circuit unit 110c is connected to the output terminal of the adjustment circuit unit 110b and converts the analog signal output from the adjustment circuit unit 110b into a digital signal that can be read by the controller 50. [

The emergency stop device for the remote monitoring system according to the preferred embodiment of the present invention may further include a digital input / output unit 60 connected between the controller 50 and the field device 70.

The digital input / output unit 60 converts the output signal of the controller 50 into a digital output signal for instructing a shut-off control of a switch (not shown, for example, a well-known circuit breaker) capable of supplying or blocking the power of the field device 70 Or outputs the state output signal from the field device 70 to a digital input signal and provides the digital input signal to the controller 50.

According to a preferred embodiment of the present invention, the controller 50 and the analog-to-digital conversion circuit portion 110c may be connected by a hardwire composed of signal lines and terminals alone.

The controller 50 and the digital input / output unit 60 may be connected by an industrial protocol such as a fieldbus line.

4 and FIG. 2 to FIG. 3, which are flowcharts illustrating an input signal process and a control signal output process of the controller in the emergency stop device for a remote monitoring system according to a preferred embodiment of the present invention, The operation of the emergency stop device for the remote monitoring system will be described as follows.

The acceleration sensor 100 installed near the field device 70 senses vibration or movement around the field device 70 and outputs an electric signal corresponding to the vibration or movement. The electrical signal may be a voltage signal and may be a weak signal if there is no vibration or movement near the field device 70 or if it is small.

The electric signal output by the acceleration sensor 100 is adjusted by the signal adjustment circuit 110 and then transmitted to the controller 50. [

3, the amplifying circuit unit 110a amplifies and outputs the electric signal outputted from the acceleration sensor 100, and the adjusting circuit unit 110b amplifies the electric signal outputted from the amplifying circuit unit 110a, And adjusts the level by adding or subtracting a predetermined voltage to the electric signal.

The analog-to-digital conversion circuit unit 110c converts the analog signal output from the adjustment circuit unit 110b into a digital signal that can be read by the controller 50 and outputs the digital signal.

The digital signal output from the analog-to-digital conversion circuit 110c is transmitted to the controller 50 via the hard wire.

Then, as in step S1 of FIG. 4, the controller 50 receives the digital signal obtained by converting the electrical signal output from the acceleration sensor 100. [

Next, as in step S2 of FIG. 4, the controller 50 determines whether the vibration or movement level represented by the received data according to the digital signal is a predetermined allowable level or not by comparing with an allowable reference value.

If the vibration or movement level indicated by the data according to the digital signal received in step S2 is equal to or exceeds a pre-set allowable level, the controller 50 proceeds to step S3, Generates and outputs an emergency stop command signal for emergency stop.

If the vibration or movement level indicated by the data according to the digital signal received in step S2 is less than a predetermined allowable level, the controller 50 performs the operation of step S1.

Upon receiving the emergency stop command signal, the switch disconnects the power supply circuit supplied to the field device 70, so that the field device 70 stops.

Thus, according to the present invention, when an emergency such as vibration or movement including an earthquake occurs, it is automatically detected, and the field device 70 can be stopped without delay.

10: user interface unit 20: database
30: optical signal transmitter 40: optical signal receiver
50: Controller 60: Digital I /
70: Field instrument 80: Emergency stop button
100: acceleration sensor 110: signal adjustment circuit
110a: Amplification circuit part 110b:
110c: analog-to-digital conversion circuit section

Claims (5)

1. An emergency stop device for a remote monitoring system for emergency stopping a field device,
An acceleration sensor for outputting a corresponding electrical signal upon sensing vibration or movement including an earthquake; And
A controller for processing an electrical signal from the acceleration sensor by a previously stored processing program to determine an emergency stop of the field device at the time of occurrence of vibration or movement exceeding an allowable vibration or movement level and outputting an emergency stop command signal to the field device side And an emergency stop device for a remote monitoring system. The method according to claim 1,
Further comprising a signal adjustment circuit connected between the acceleration sensor and the controller for adjusting an electric signal from the acceleration sensor. 3. The method of claim 2,
Wherein the signal adjustment circuit comprises:
And an amplifying circuit unit for amplifying and outputting an electric signal output from the acceleration sensor. 3. The method of claim 2,
Wherein the signal adjustment circuit comprises:
An amplification circuit unit for amplifying and outputting an electric signal output from the acceleration sensor;
An adjusting circuit connected to an output terminal of the amplifying circuit to adjust a level by adding or subtracting a predetermined voltage to an electric signal output from the amplifying circuit; And
And an analog-to-digital conversion circuit unit connected to an output terminal of the adjustment circuit unit for converting an analog signal output from the adjustment circuit unit into a digital signal. The method according to claim 1,
And a control unit connected between the controller and the field device for converting the output signal of the controller into a digital output signal instructing interruption control of the switch capable of supplying or disconnecting the power of the field device and outputting the digital output signal to the switch, And a digital input / output unit for converting the status output signal of the emergency stop unit into a digital input signal and providing the digital input signal to the controller.
KR20130106216A 2013-09-04 2013-09-04 Emergency stop apparatus for scada system KR20150027591A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20130106216A KR20150027591A (en) 2013-09-04 2013-09-04 Emergency stop apparatus for scada system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20130106216A KR20150027591A (en) 2013-09-04 2013-09-04 Emergency stop apparatus for scada system

Publications (1)

Publication Number Publication Date
KR20150027591A true KR20150027591A (en) 2015-03-12

Family

ID=53022891

Family Applications (1)

Application Number Title Priority Date Filing Date
KR20130106216A KR20150027591A (en) 2013-09-04 2013-09-04 Emergency stop apparatus for scada system

Country Status (1)

Country Link
KR (1) KR20150027591A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105223880A (en) * 2015-09-18 2016-01-06 航宇救生装备有限公司 A kind of programmed control box net synchronization capability detection method and device
JP2018141704A (en) * 2017-02-28 2018-09-13 ブラザー工業株式会社 Relocation detection device, relocation detection system and relocation detection method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105223880A (en) * 2015-09-18 2016-01-06 航宇救生装备有限公司 A kind of programmed control box net synchronization capability detection method and device
JP2018141704A (en) * 2017-02-28 2018-09-13 ブラザー工業株式会社 Relocation detection device, relocation detection system and relocation detection method

Similar Documents

Publication Publication Date Title
KR101801169B1 (en) Power distribution system for integrating management based on IOT
KR100695021B1 (en) Substation system of iec 61850 base using xml trip logic
KR20140073043A (en) Application service system of smart terminal for watching power equipment
JP2014016930A (en) Safety system and control device
CN110085333B (en) Protection system suitable for small-size reactor
KR102034894B1 (en) Management system for circuit breakers in switchboard
KR20090122508A (en) Apparatus and method for goose message detecting
KR20230082007A (en) An Apparatus for Monitering a Distribution Panel Board
KR101900730B1 (en) Digital protection relay and netwark system using the same
KR102014643B1 (en) Test apparatus for intelligent electronic device and testing method of intelligent electronic device using the same
KR102243534B1 (en) Smart distribution board management system for disaster safety
KR20150027591A (en) Emergency stop apparatus for scada system
US20180005542A1 (en) High Voltage Training Device and System and Method Thereof
KR102160425B1 (en) Management system for circuit breakers in distribution panel
US20140059252A1 (en) Method for configuring a field device and corresponding system for parameterization
CN107231270A (en) Slave module for monitoring electrical system
KR101748724B1 (en) Apparatus for testing valve base electronics
KR100718496B1 (en) Anti-islanding apparatus for distributed generation using Power Line Communication and using method thereof
US20200193069A1 (en) Method and system for determining whether state information associated with executing device has been tampered with
CN107547639B (en) Centralized operation and maintenance hosting system of power distribution room
JP6786322B2 (en) Misoperation prevention system
KR101430680B1 (en) Proactive monitoring system and method thereof
KR20210034533A (en) Apparatus for Detector of Temperature of Rack
KR101861576B1 (en) Field information processing panel based on IEC61850
CN205121541U (en) But remote alarm and spare embedded system encrypt spare still original mounting

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application