KR101685101B1 - Monitoring system and method for electric power equipment having earth-quake-proof function - Google Patents

Monitoring system and method for electric power equipment having earth-quake-proof function Download PDF

Info

Publication number
KR101685101B1
KR101685101B1 KR1020150171464A KR20150171464A KR101685101B1 KR 101685101 B1 KR101685101 B1 KR 101685101B1 KR 1020150171464 A KR1020150171464 A KR 1020150171464A KR 20150171464 A KR20150171464 A KR 20150171464A KR 101685101 B1 KR101685101 B1 KR 101685101B1
Authority
KR
South Korea
Prior art keywords
power control
earthquake
signal
deterioration
detection unit
Prior art date
Application number
KR1020150171464A
Other languages
Korean (ko)
Inventor
김대호
Original Assignee
주식회사 대경산전
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 주식회사 대경산전 filed Critical 주식회사 대경산전
Priority to KR1020150171464A priority Critical patent/KR101685101B1/en
Application granted granted Critical
Publication of KR101685101B1 publication Critical patent/KR101685101B1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40—Testing power supplies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The present invention relates to a monitoring system and a monitoring method for power control equipment having an earthquake-proof function, capable of minimizing possibility for occurrence of a secondary accident due to an earthquake while ensuring maximum operation of the power control equipment such as a switchboard. The monitoring system for the power control equipment having the earthquake-proof function includes: a discharge detection unit for detecting and analyzing a transient signal generated by an arc or corona discharge to output an analysis result; a temperature detection unit for detecting an external temperature and an internal temperature of the power control equipment to output a detection result; an earthquake detection unit for detecting an earthquake intensity to output a detection result; and a control unit for calculating a degree of deterioration by analyzing output signals of the discharge detection unit and the temperature detection unit using a multi-faceted evaluation scheme, and actively adjusting analysis sensitivity with respect to the number of transient signals, average of transient signals, deviation of transient signals, the internal temperature, and the external temperature according to the earthquake intensity.

Description

TECHNICAL FIELD [0001] The present invention relates to a monitoring system and a monitoring method for a power control facility having an earthquake-

The present invention relates to a power control facility monitoring system and method, and more particularly, to a power control facility monitoring system and method having an earthquake-proof function.

Generally, the switchgear converts high-voltage power to low pressure in a wide range of power consumers such as residential areas, buildings, schools, factories, ports, airports, water supply and sewage treatment plants, substations, heavy industrial plants, subways, chemical complexes, And is used for power monitoring, control and protection.

In consideration of the safety of electric shock and fire in the process of use, such a switchboard is provided with an insulation enclosure equipped with an opening / closing type power distributing door door for limiting direct contact with the outside and for internal inspection or maintenance, Considering the reliability of the supply voltage, installation of various protective devices such as circuit breakers and lightning arresters inside the enclosure is essential.

As the usage of electric power increases rapidly, fire and power outage accidents due to deterioration are increasing in the electric power facilities of switchgear and high voltage used in buildings and industrial factories.

Korean Patent Application No. 10-2015-0056846 and the like propose technologies for diagnosing the possibility of deterioration in advance and minimizing the possibility of an accident caused by the deterioration. However, this method has a disadvantage in that it can not consider the possibility of an earthquake at all. In other words, there is a problem that the possibility of a secondary accident such as a fire is easily generated even in an arc or corona discharge situation, which is not normally a problem in the event of an earthquake, is rapidly increased. However, in the domestic application No. 10-2015-0056846, There is a disadvantage that it can not be considered at all.

However, the Korean Patent Application No. 10-2011-0072005 discloses a technology for detecting an earthquake to perform a power cut-off operation. However, this is a level that suggests only a simple concept of performing a power cut-off operation when an earthquake is detected It just stops.

In order to solve the above problems, it is an object of the present invention to provide a power control system having an earthquake-proof function that minimizes the possibility of a secondary accident due to an earthquake, Monitoring system and method.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to one aspect of the present invention, there is provided a risk monitoring system for a power control facility having an earthquake-proof function, including: a discharge detection unit for detecting and analyzing a transient signal generated by an arc or a corona discharge, part; A temperature detector for detecting and outputting an external temperature and an internal temperature of the power control facility; An earthquake detection unit for detecting and outputting an earthquake intensity; And a controller for calculating a deterioration degree by analyzing an output signal of the discharge detection unit and the temperature detection unit according to a multi-plane evaluation method, wherein the number of the transient signal, the transient signal average, the transient signal deviation, And a controller for actively adjusting the analytical sensitivity for each of the external temperatures.

Wherein the control unit includes: a plurality of analysis reference tables having different sensitivity levels for each signal according to seismic intensity; And an analysis reference table corresponding to the currently sensed seismic intensity is selected from among the plurality of analysis reference tables to analyze the output signals of the discharge detection unit and the temperature detection unit, A calculating unit; And a deterioration degree calculation unit for calculating the degree of deterioration of the power control facility by applying the signal-by-signal evaluation index to the multi-aspect evaluation method.

The controller may further include a power cutoff control unit for performing a cutoff operation corresponding to the deterioration level; And an alarm control unit for performing an alarm operation corresponding to the degree of deterioration.

According to another aspect of the present invention, there is provided a method for monitoring a power control facility having a seismic function of a risk monitoring system for a power control facility, the method comprising: Registering a plurality of analysis criteria tables; Sensing the seismic intensity and selecting one of the plurality of analysis criteria tables according to the seismic intensity; Calculating an evaluation index for each signal according to the selected analysis reference table after detecting a transient signal generated by an arc or a corona discharge and an external temperature and an internal temperature of the power control facility; And calculating the degree of deterioration of the power control equipment by applying the signal-by-signal evaluation index to the multi-surface evaluation method.

The present invention analyzes the discharge detection result and the temperature detection result such as the number of transient signals, the transient signal average, the transient signal deviation, the internal temperature, and the external temperature according to the multi-surface evaluation method to calculate the degree of deterioration, And to actively adjust the sensitivity of the analysis.

Accordingly, the present invention can minimize the possibility of a secondary accident caused by an earthquake, and can provide an effect of maximizing the operation of a power control facility such as a power plant.

1 is a diagram illustrating a power control facility monitoring system having an earthquake-proof function according to an embodiment of the present invention.
2 is a block diagram illustrating a detailed configuration of a control unit according to an embodiment of the present invention.
3 is a diagram illustrating examples of a plurality of analysis criteria tables according to an embodiment of the present invention.
4 is a diagram for explaining the principle of calculating the degree of deterioration using the multi-facet evaluation method according to an embodiment of the present invention.
5 is a diagram illustrating a power control facility monitoring method having an earthquake-proof function according to an embodiment of the present invention.

Hereinafter, embodiments and examples of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains.

It should be understood, however, that the present invention may be embodied in many different forms and is not limited to the embodiments and examples described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise.

As used herein, the terms "about," " substantially, "and the like are used herein to refer to or approximate the numerical value of manufacturing and material tolerances inherent in the stated sense, Accurate or absolute numbers are used to prevent unauthorized exploitation by unauthorized intruders of the mentioned disclosure. Also, throughout the present specification, the phrase " step "or" step "does not mean" step for.

Throughout this specification, the term "combination thereof" included in the expression of the machine form means one or more combinations or combinations selected from the group consisting of the constituents described in the expression of the machine form, And the like.

Throughout this specification, the description of "A and / or B" means "A or B, or A and B".

1 is a diagram illustrating a power control facility monitoring system having an earthquake-proof function according to an embodiment of the present invention.

1, the system 100 of the present invention includes a discharge detection unit 110, a temperature detection unit 120, an earthquake detection unit 130, a control unit 140, an alarm notification unit 150, An interface 160, a communication unit 170, and the like.

For reference, when an earthquake occurs, the arc discharge of the electric power control facility, the corona discharge, and the electric fire due to the connection failure state may occur more easily than usual.

Accordingly, the present invention evaluates the degree of deterioration according to the arc or corona discharge and the equipment temperature, and thereby controls the operation of the power control facility. In the event of an earthquake, the arc or corona discharge and the analysis sensitivity to the equipment temperature are temporarily improved , A weak arc discharge, a corona discharge, and a connection failure state so that the power interruption operation can be performed immediately. That is, it is possible to prevent secondary damage due to the power control facility in the event of an earthquake by making it more responsive to arc discharge, corona discharge, and poor connection state.

The discharge detection unit 110 includes at least one of an ultrasonic sensor, a leakage current sensor, and a voltage detection sensor disposed inside the metal housing of the power control facility 200, and is generated by the arc or corona discharge of the power equipment Thereby detecting a transient signal. An average, and a deviation of the transient signals, and outputs the analyzed results, so that the controller 140 can recognize the degree of occurrence of arc or corona discharge.

The temperature sensing unit 120 includes a plurality of temperature sensors distributed in and out of the metal housing of the power control facility 140. The external temperature of the power control facility 200 is measured through a temperature sensor attached to the outside of the metal housing and the temperature of the power control facility 200 Power equipment) is measured.

For reference, the power equipment provided in the metal housing of the power control facility may be a device having weak characteristics of deterioration or fire, particularly, a booth bar, a cable connection, a switch connection, or a terminal connection portion of a breaker. Thus, in the present invention, the installation points of these devices are set as the monitoring target points, and the temperatures of these devices can be intensively monitored.

The earthquake sensing unit 130 includes at least one of a three-axis gyro sensor, a three-axis acceleration sensor, a gravity sensor, and a compass sensor attached to a metal housing of the power control facility 140, .

The control unit 140 controls the signals obtained through the discharge detection unit 110 and the temperature sensing unit 120 (i.e., the number of transient signals, the transient signal average, the transient signal deviation, the external temperature, and the internal temperature) After calculating the degree of deterioration, the power interruption operation and the alarm operation are performed in a multistage manner.

Particularly, considering that the possibility of facility fire due to arc discharge, corona discharge, and the like is increased exponentially in the event of an earthquake, the control unit 140 of the present invention can actively change the analytical sensitivity of each signal according to the earthquake strength, Is more sensitive to a dangerous situation such as an arc discharge, a corona discharge, etc., so that the power cut-off operation and the alarm operation can be performed.

The alarm notification unit 150 includes a warning lamp, a speaker, and the like, through which the degree of deterioration of the power control facility is visually and audibly notified.

The user interface 160 includes a touch screen, a control panel, and the like, and receives various user control values necessary for driving the system, or guides the user to a driving result of the system.

The communication unit 170 includes a wired or wireless communication module to support communication with an external device to receive various control values necessary for driving the system from an external device or to share a driving result of the system with an external device .

2 is a block diagram illustrating a detailed configuration of a control unit according to an embodiment of the present invention.

2, the control unit 140 includes a plurality of analysis reference tables 411 to 414, a signal-by-signal evaluation index calculating unit 420, a deterioration degree calculating unit 430, A blocking control unit 441, an alarm control unit 442, and the like.

The plurality of analysis reference tables 411 to 414 correspond to each of the seismic intensities, and the analysis sensitivity for each signal is set differently according to the seismic intensity.

3, an analysis reference table corresponding to each of "1 to 3", "4 to 6", and "7 or more" is provided as the earthquake intensity "0" And the analysis reference values of the signals may be different for each analysis reference table. For example, by decreasing the step-by-step analysis standard of the number of transient signals, transient signal averages, and transient signal proportions in proportion to the seismic intensity, the more the seismic intensity becomes smaller, the more susceptible it is to the minute signal changes.

The signal-by-signal evaluation index calculator 420 selects an analysis reference table corresponding to the currently detected earthquake intensity among the plurality of analysis reference tables 411 to 414, And extracts an evaluation index for each signal.

As shown in FIG. 4, the deterioration degree calculating unit 430 applies the signal-by-signal evaluation index to the multi-facet evaluation method to calculate the degree of deterioration with respect to the power control facility.

For example, when the evaluation index of all the signals is normal as shown in FIG. 4A, or the area of the polyhedron having the vertices of each signal evaluation index is within the normal range, .

If the evaluation index of one of the plurality of signals deviates from the normal range as shown in FIG. 4 (b), or if the area of the polyhedron having vertices of each signal evaluation index belongs to the attention range, the degree of deterioration with respect to the power control equipment Step.

When the at least two evaluation indices of the plurality of signals are out of the attention range or the area of the polyhedron having the vertex of each signal evaluation index belongs to the warning range as shown in FIG. 4 (c), the degree of deterioration with respect to the power control equipment It is determined to be a warning step.

If at least three evaluation indices of the plurality of signals deviate from the warning range or the area of the polyhedron having the vertex of each signal evaluation index falls within the danger range as shown in FIG. 4 (d), the degree of deterioration with respect to the power control facility It is judged to be a dangerous stage.

The power cutoff control unit 441 and the alarm control unit 442 previously define a power cutoff procedure and an alarm execution procedure corresponding to the respective degrees of deterioration. When the degree of deterioration is determined by the deterioration degree calculating unit 430, the power cutoff procedure and the alarm execution procedure are immediately performed.

For example, when the degree of deterioration is a normal level, an additional operation is not performed. In the case of the attention level, an alarm operation is performed to notify the current degree of deterioration audibly and, An alarm for audibly notifying the degree of deterioration of the current audiovisual operation and at the same time temporarily suspending the supply of power to equipment having a relatively low level of importance; and finally, in the case of a dangerous stage, an alarm It will be able to suspend the power supply to all equipment at the same time as the operation is performed.

5 is a diagram illustrating a power control facility monitoring method having an earthquake-proof function according to an embodiment of the present invention.

First, it is determined whether an earthquake occurs at the place where the power control installation is installed through the earthquake sensing unit 130, and further, the earthquake strength is measured (S10)

Then, the control unit 140 obtains an analysis reference table corresponding to the currently measured seismic intensity among a plurality of analysis reference tables that are acquired and managed in advance (S20), and then, through the discharge detection unit 110, The transient signal generated by the discharge is measured (S31), and the temperature inside and outside of the power control facility 200 is measured through the temperature sensing unit 120 (S32).

Then, based on the analysis reference table obtained in step S20, the number of transient signals, the transient signal average, the transient signal deviation, the external temperature, and the internal temperature acquired through the discharge sensing unit 110 and the temperature sensing unit 120 And extracts an evaluation index for each signal (S40).

Then, the degree of deterioration with respect to the power control facility is calculated by applying the extracted evaluation index to the multi-level evaluation method (S50), and the power cutoff operation and the alarm operation optimized for the current situation are performed in consideration of this (S60) .

Such monitoring of the power control facility may be repeatedly executed when the power control facility is operated. If the earthquake intensity is changed due to an earthquake during the monitoring operation, the type of the analysis standard table is changed according to the earthquake strength, Thereby enabling an optimized power-off operation to be performed immediately.

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention .

Claims (4)

A risk monitoring system for a power control facility having an earthquake-proof function,
A discharge detection unit for detecting and analyzing a transient signal generated by an arc or a corona discharge and outputting the result;
A temperature detector for detecting and outputting an external temperature and an internal temperature of the power control facility;
An earthquake detection unit for detecting and outputting an earthquake intensity; And
Wherein the controller is further configured to calculate the degree of deterioration by analyzing the discharge detection unit and the output signal of the temperature detection unit according to a multi-surface evaluation method, and calculate the degree of deterioration based on the number of transient signals, the transient signal average, the transient signal deviation, And a controller for actively adjusting the analytical sensitivity of each of the target devices. The apparatus of claim 1, wherein the control unit
A number of analytical criteria tables with different sensitivity for each signal according to seismic intensity;
And an analysis reference table corresponding to the currently sensed seismic intensity is selected from among the plurality of analysis reference tables to analyze the output signals of the discharge detection unit and the temperature detection unit, A calculating unit; And
And a deterioration degree calculating unit for calculating the deterioration degree of the power control facility by applying the signal-by-signal evaluation index to the multi-surface evaluation method. 3. The method of claim 2,
A power cutoff control unit for performing a power cutoff operation corresponding to the degree of deterioration; And
And an alarm control unit for performing an alarm operation corresponding to the degree of deterioration. CLAIMS 1. A method for monitoring a power control facility having an earthquake-resistant function of a risk monitoring system of a power control facility,
Registering a plurality of analysis reference tables for which signal analysis sensitivity is set differently according to seismic intensity;
Sensing the seismic intensity and selecting one of the plurality of analysis criteria tables according to the seismic intensity;
Calculating an evaluation index for each signal according to the selected analysis reference table after detecting a transient signal generated by an arc or a corona discharge and an external temperature and an internal temperature of the power control facility; And
And calculating the degree of deterioration of the power control facility by applying the signal-by-signal evaluation index to the multi-plane evaluation method.
KR1020150171464A 2015-12-03 2015-12-03 Monitoring system and method for electric power equipment having earth-quake-proof function KR101685101B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150171464A KR101685101B1 (en) 2015-12-03 2015-12-03 Monitoring system and method for electric power equipment having earth-quake-proof function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150171464A KR101685101B1 (en) 2015-12-03 2015-12-03 Monitoring system and method for electric power equipment having earth-quake-proof function

Publications (1)

Publication Number Publication Date
KR101685101B1 true KR101685101B1 (en) 2016-12-09

Family

ID=57574628

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150171464A KR101685101B1 (en) 2015-12-03 2015-12-03 Monitoring system and method for electric power equipment having earth-quake-proof function

Country Status (1)

Country Link
KR (1) KR101685101B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019183251A1 (en) * 2018-03-20 2019-09-26 Whisker Labs, Inc. Detection of electric discharges that precede fires in electrical wiring
KR102304031B1 (en) * 2020-12-30 2021-09-24 (주)우보재난시스템 Method for controlling battery output with immersion detection means
KR102304022B1 (en) * 2020-12-30 2021-09-24 (주)우보재난시스템 Apparatus for controlling battery output with immersion detection means

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101262907B1 (en) * 2013-02-18 2013-05-09 (주) 동보파워텍 Disaster resistant switchgear installed digital control system equipped with earthquake intensity step by step blocking function
KR20150018215A (en) * 2013-08-09 2015-02-23 (주)서전기전 Power distributing board having cutting-off system of equipped seismic-sensing function and operation method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101262907B1 (en) * 2013-02-18 2013-05-09 (주) 동보파워텍 Disaster resistant switchgear installed digital control system equipped with earthquake intensity step by step blocking function
KR20150018215A (en) * 2013-08-09 2015-02-23 (주)서전기전 Power distributing board having cutting-off system of equipped seismic-sensing function and operation method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019183251A1 (en) * 2018-03-20 2019-09-26 Whisker Labs, Inc. Detection of electric discharges that precede fires in electrical wiring
US10641806B2 (en) 2018-03-20 2020-05-05 Whisker Labs, Inc. Detection of electric discharges that precede fires in electrical wiring
US11754607B2 (en) 2018-03-20 2023-09-12 Whisker Labs, Inc. Detection of electric discharges that precede fires in electrical wiring
KR102304031B1 (en) * 2020-12-30 2021-09-24 (주)우보재난시스템 Method for controlling battery output with immersion detection means
KR102304022B1 (en) * 2020-12-30 2021-09-24 (주)우보재난시스템 Apparatus for controlling battery output with immersion detection means

Similar Documents

Publication Publication Date Title
KR101717775B1 (en) System for Analysising and Predicting Electric Fire using Intelligent Pre-signal Analysis
RU2634123C2 (en) Method, system and device for safety system and dynamic marking activation
KR101033525B1 (en) Integrated power electric switchgear for disaster prevention
KR101355585B1 (en) Apparatus and method for diagnosing deterioration of distributing board
KR101301554B1 (en) Intelligent integration-condition monitoring and diagnosing system for heavy electrical equipment
KR101194708B1 (en) High and low voltage distribution panel, motor center control panel and switch gear panel having trip level control system using arc flash accident energy calculation
KR102057494B1 (en) Smart electrical accident prevention and energy management system
KR101262907B1 (en) Disaster resistant switchgear installed digital control system equipped with earthquake intensity step by step blocking function
KR101685101B1 (en) Monitoring system and method for electric power equipment having earth-quake-proof function
KR101708005B1 (en) Dc overload and combined arc interruption device
KR20180106318A (en) Fire prevention device using multiple sensors
KR101520263B1 (en) Intelligent power distribution panel for sensing fire
KR101225125B1 (en) Remote automatic control system and control method having diagnosis function of accident prediction through monitor-analysis of electric quality
CN113049901A (en) Electrical control and protection device
KR20140101539A (en) A high tension panel, low tension panel, dstribution panel and motor control panel for Fire Sensing Fuction
KR101917664B1 (en) Distribution board having a detecting function of arc type and arc position
KR101919074B1 (en) Electric fire prevention system
KR20130137370A (en) An integrating incoming and distributing board for monitoring the arc, partial discharge, and temperature and the controling method therof
KR102491071B1 (en) Switchboard With A Built-in Hybrid Monitoring Device Equipped With The Function Of Diagnosing The Deterioration State Of Power Equipment And Preventing Electric Shock Accident In The Energized Parts
CN102067399A (en) Electric installation structure
KR20170101680A (en) Internet of Things (IoT) based on the combined arc overload blocking device for electric fire prevention
KR20110041042A (en) Contactless type safety electroscope
KR20190128908A (en) Apparatus for diagnosing an operation status of a protective equipment for distribution line
KR102036311B1 (en) Apparatus and method for monitoring gas pressure of gis(gas insulated switchgear) in substation
KR101932260B1 (en) Distribution Board with Leakage Current Sensing Device

Legal Events

Date Code Title Description
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20191204

Year of fee payment: 4