Buk, South Korea
Buk, South Korea

Time filter

Source Type

The present disclosure relates to a system for predicting abnormality occurrence using a PLC log data, the system including a controller configured to receive a data from a lower-level device connected to a PLC data log module and determine the data, and to store the data in an event storage when the data is a data related to abnormality occurrence, an analyzer configured to generate an abnormality analysis result by analyzing the data related to abnormality occurrence, and an analysis result storage configured to store the abnormality analysis result, wherein the controller compares the data transmitted from the lower-level device with the abnormality analysis result stored in the analysis result storage, and generates an abnormality occurrence prediction signal, when it is determined that the data transmitted from the lower-level device is similar to the abnormality analysis result.


Patent
LSIS Co. | Date: 2016-05-11

A method of designing a multiple-tuned filter (MTF) of a high voltage direct current (HVDC) system is provided. The method includes selecting an input parameter for the MTF, setting a resonance frequency of the MTF, calculating values of inductance (L) and capacitance (C) which are filter parameters of the MTF on the basis of the input parameter and the resonance frequency, combining a value of resistance (R) with the filter parameters and calculating a price according to the combination, and storing the combined values of R, L, and C when the calculated price falls within a predetermined price range.


Patent
LSIS Co. | Date: 2016-05-04

There is provided an interlock apparatus of a vacuum circuit breaker for adjusting withdrawal of a circuit breaker main body, which is installed in a truck and moves to a connected position in which the circuit breaker main body is connected to a cradle and moves to a disconnected position in which the circuit breaker main body is separated from the cradle within the cradle, to outside of the cradle, which includes: a lift (100) including a rotation adjusting plate (110) provided on an upper portion thereof, and moving forwardly and backwardly such that the rotation adjusting plate is inserted into the interior of the cradle or separated from the cradle; and an interlock plate (500) provided within the cradle and rotating according to movement of the rotation adjusting plate so as to be tightly attached to the truck or released from the tightly attached state to thereby adjust withdrawal of the circuit breaker main body to the outside of the cradle.


Methods for temperature drift compensation of a temperature measurement device using a thermocouple are presented. In one embodiment, the temperature drift may be compensated for through reference junction compensation alone using a thermistor for reference junction compensation without providing a separate temperature measurement element. Thereby, precision of a measured temperature may not change despite change in temperature of the surroundings measured by the temperature measurement device, and the manufacturing cost may be effectively reduced.


Patent
Lsis Co. | Date: 2016-06-02

The present invention relates to a system for assessing a health index of a switchgear, and the system comprises a remaining life assessment unit that calculates a remaining life of the switchgear based on a number of uses, a number of operations, and history information of the switchgear; a deterioration degree assessment unit that examines a deterioration degree of the switchgear based on installation environment information and inspection information; a risk degree assessment unit that detects a risk degree of the switchgear based on partial discharge data, insulating gas analysis data, and temperature data; and a health index assessment unit that assesses a health index of the switchgear based on the remaining life information of the switchgear, the deterioration degree information, and the risk degree information of the switchgear.


Patent
Lsis Co. | Date: 2016-06-01

Some embodiments include an output adjustment device of an analog output module so as to verify a normal operation of an analog output module for use in a programmable logic controller (PLC). The output adjustment device of an analog output module may include: a microprocessor unit (MPU) performing an arithmetic operation on a digital signal, an analog output module including an analog signal output unit receiving a signal output from the MPU to output an analog signal, and an output signal adjustment unit outputting a control signal for controlling a magnitude or amplitude of the output analog signal to the MPU.


Patent
Lsis Co. | Date: 2016-06-02

Some embodiments include a PLC apparatus which is capable of predicting its life expectancy depending on an ambient temperature of the PLC apparatus. The PLC apparatus includes: an input unit through which a user inputs an ambient temperature of a PLC; a memory in which a life expectancy of a part depending on the ambient temperature is stored; a diagnosing unit configured to predict the PLC life expectancy by calculating a ratio of part life expectancy corresponding to the input ambient temperature to reference life given when the PLC is made, and compare PLC used time and the PLC life expectancy to determine whether or not the PLC used time exceeds the PLC life expectancy; and a control unit configured to control the operation of the input unit, the memory and the diagnosing unit.


Patent
Lsis Co. | Date: 2016-06-01

In some embodiments, an inverter system may include a plurality of inverters. In some embodiments, a method of controlling the plurality of inverters may include one inverter among the plurality of inverters set as a communication master to control other inverters set as communication slaves, may include the steps of generating a communication master signal in the communication master to transmit to the communication slaves, may verify whether or not the communication master signal is designated to be received by the communication slaves when the communication slaves receive the communication master signal, and may transmit a response signal with respect to the communication master signal to the inverters of the inverter system according to the verification result.


Patent
Lsis Co. | Date: 2016-06-02

Some embodiments may include a water supply system for supplying water based on a predetermined planned daily supply amount of water. While the worries supplied, it may be determined whether a second time has reached after a predetermined time passed from a first time. When it is determined that the second time has reached, an accumulated amount of the supplied water may be measured. A difference between the measured accumulated amount of the supplied water and the planned daily supply amount of water may be calculated. The planned daily supply amount of water may be corrected by adding the calculated difference to the planned daily supply amount of water after the second time. Water may be supplied based on the corrected planned daily supply amount of water.


A transformer position adjustment preventing device includes a case having a handle insertion unit formed therein, a position displaying unit disposed in the case and displaying a test position or an operation position of a transformer truck with a transformer seated thereon, a rotating member disposed in the case, connected to the position displaying unit, rotated by the rotation of the position displaying unit to open or close the handle insertion unit, and a restricting member rotated in a direction of the rotating member or an opposite direction of the rotating member according to opening or closing of a door opening and closing the transformer chamber in which the transformer truck is disposed, so as to restrict the rotation of the rotating member or release the restriction state. Thus, the transformer position adjustment preventing device has an advantage of limiting the insertion of a handle through a handle insertion unit while a door is opened when a transformer truck is located at a test position or an operation position.

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