KR100661909B1 - Phase checking system of three phase power line using power line communication - Google Patents

Abstract

A phase checking system of a three-phase power line using power line communication is provided to measure a phase at any point of a corresponding line and measure the corresponding phase in a single phase. A phase checking system includes an equipment line(130) receiving a three-phase voltage, a first device applying a certain frequency to each phase of the three-phase voltage in combination with a power line of the equipment line, and a second device receiving and detecting the certain frequency to measure the phase of a voltage to be used in the equipment line. A display(170) displays each phase in combination with the second device.

Description

Inspection system of three-phase power line using power line communication method {PHASE CHECKING SYSTEM OF THREE PHASE POWER LINE USING POWER LINE COMMUNICATION}

1 is a block diagram showing a three-phase imaging system according to the prior art.

2 is a block diagram showing a diagnosis system according to an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

100; Screening system 110; Master gauge

120; Three-phase voltage input 130; Equipment line

131,133; Distribution panel 132,134; equipment

140; Single phase (or three phase) voltage drawing terminal 150; Probe

160; Slave instrument 170; Display

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a inspection system, and more particularly to a inspection system for a three-phase power line using power line communication.

In the case of the connection of the high voltage meter, it is common to check whether the phase of the three wires of the three phases is normal or reverse, and then connect the high voltage meter in accordance with the phase. At this time, in case of normal, the wiring to be normal should be done. In case of reversed phase, the miswiring is not possible only if the meter is connected in reverse phase.

1 is a block diagram showing a conventional three-phase imaging system. Referring to FIG. 1, when a three-phase voltage is supplied, conventionally, a method of reading a phase phase and a phase phase through a phase comparison method is read. Thus, a zero phase and a reverse phase may be read. The screening system to check the phase connection of the phase for REVERSE PHASE was mainly used.

Since all lines are required for phase inspection using such a thing, there was no way to know the phase of the single phase when the single phase was introduced. And, it is very difficult to identify each phase (R, S, T phase) of the three-phase line at a time, and it was not possible to know which of the R, S, T phases.

On the other hand, it is very dangerous to check the phase in the live work that the electricity is turned on, there was a problem that the phase of the power to cut off the phase check. In addition, when the connection of the incoming line is long, such as line equipment or semiconductor equipment, it is very difficult to find the phase of the corresponding line, which causes a problem of incorrect wiring.

Accordingly, the present invention has been made to solve the above-described problems in the prior art, an object of the present invention to provide an imaging system that can accurately measure the image anywhere in the line.

The inspection system according to the present invention for achieving the above object is characterized by measuring the phase of the single-phase or three-phase line using a power line communication method.

According to an aspect of the present invention, there is provided a scanning system including: an equipment line into which a three-phase voltage is introduced; A first mechanism combined with a power line of the equipment line to apply a constant frequency to each phase of the three-phase voltage; And a second mechanism combined with the power line of the equipment line to receive and detect the constant frequency to measure the phase of the voltage used in the equipment line.

In an embodiment of the present invention, the display unit may further include a display unit, which is combined with the second mechanism to label each image to the outside. The display unit may include an R phase LED, an S phase LED, and a T phase LED. LED).

In an embodiment of the invention, the phase of the voltage used in the equipment line is single phase or three phase.

In an embodiment of the invention, the first mechanism is electrically coupled to the voltage inlet of the equipment line and the second mechanism is electrically coupled to the voltage inlet of the equipment line. The second mechanism is electrically coupled via the voltage draw end and the probe.

In an embodiment of the present invention, at least one of the first and second mechanisms includes a frequency modulator and a power line three-phase coupler.

According to the present invention, by using the power line frequency communication method, there is no problem of the deafness generated in the existing wireless communication method, and it is possible to integrate the corresponding technology into the power line communication by escaping the communication method by installing lines in a specific area. .

Hereinafter, with reference to the accompanying drawings, the examination system according to the present invention will be described in detail.

Advantages of the present invention over prior art will become apparent from the detailed description and claims with reference to the accompanying drawings. In particular, the present invention is well pointed out and claimed in the claims. However, the present invention may be best understood by reference to the following detailed description in conjunction with the accompanying drawings. Like reference numerals in the drawings denote like elements throughout the various drawings.

(Example)

2 is a block diagram illustrating a medical examination system according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the imaging system 100 according to the present embodiment is applied to a three-phase voltage inlet terminal 120 that applies a three-phase voltage to a factory or an equipment line 130 composed of equipments 132 and 134 to measure phases. The master instrument 110 is electrically coupled, and the slave instrument or slave instrument 160 is electrically coupled to the voltage withdrawal terminal 140 which draws the single phase or three phase voltage applied to any equipment 132 to be measured. It is. Here, the equipments 132 and 134 disposed in the equipment line 130 operate by receiving a necessary voltage through the distribution boards 131 and 133. In the present embodiment, two equipments 132 and 134 are exemplified for convenience of description, but the number is arbitrary.

The master instrument 110 is a frequency modulation unit 112 (FREQUENCY MODULATION), which is a communication method that carries a signal change to a carrier frequency change in a range, and a power line three-phase coupler unit 114 that distributes or extracts signal power. ) The master instrument 110 applies a high frequency (eg, 3 MHz) to each phase (R, S, T phase) of the three phase voltage entering the equipment line 130.

The slave instrument 160 includes a frequency modulation 162 (FREQUENCY MODULATION) and a power line three-phase coupler 164, like the master instrument 110 described above, in addition to the single-phase or three-phase voltage R, It further comprises a display unit 170 for visually labeling each of the S, T phase. The display unit 170 includes, for example, a light emitting device (LED), specifically, an R-phase LED 172, an S-phase LED 174, and a T-phase LED 176.

The slave instrument 160 receives and detects the high frequency applied by the master instrument 110. For example, the high frequency applied to the voltage applied to the equipment 132 by the master instrument 110 is detected and only the phase of the voltage applied to the equipment 132, for example, R phase or R, S, T It recognizes whether the combination of the phases to label the recognized phase through the label unit 170 to the outside. The connection between the slave instrument 160 and the voltage drawing terminal 140 is made through the probe 150.

The examination system 100 configured as described above operates as follows.

Three phase voltages required to drive the equipment 132, 134 into a predetermined equipment line 130 are introduced. At this time, the master instrument 110 applies a constant high frequency to each of the three phases (R, S, T phase). The slave instrument 160 receives and detects the applied high frequency wave. That is, the master instrument 110 applies a constant high frequency to each of the three phases through the power line, and the slave instrument 160 receives the corresponding frequency to detect what phase.

Depending on the equipment 132 and 134, a single phase voltage may be applied. The imaging system 100 of the present embodiment may measure phase on any line regardless of whether the phase system is single phase or three phase. On the other hand, even in the live line work is electricity can be easily confirmed through the probe 150.

The foregoing detailed description illustrates the present invention. In addition, the foregoing description merely shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. And, it is possible to change or modify within the scope of the concept of the invention disclosed in this specification, the scope equivalent to the written description, and / or the skill or knowledge in the art. The above-described embodiments are for explaining the best state in carrying out the present invention, the use of other inventions such as the present invention in other state known in the art, and the specific fields of application and uses of the present invention. Various changes are also possible. Accordingly, the detailed description of the invention is not intended to limit the invention to the disclosed embodiments. Also, the appended claims should be construed to include other embodiments.

As described in detail above, according to the present invention, it is possible to measure the phase anywhere in the line, and unlike the conventional, there is an effect that can measure the phase in the single phase. In addition, since the phase power source specified in the blueprint of various equipments can be accurately identified, incorrect wiring can be prevented during equipment wiring, and load imbalance can be avoided. In addition, unlike the existing R, S, T phase can be accurately identified, there is an effect that it is easy to install and maintain.

Claims (7)

Equipment line into which three-phase voltage is drawn; A first mechanism combined with a power line of the equipment line to apply a constant frequency to each phase of the three-phase voltage; And A second mechanism, combined with a power line of the equipment line, for receiving and detecting the constant frequency to measure a phase of the voltage used in the equipment line; A diagnostic system comprising a. The method of claim 1, And a display unit coupled to the second mechanism for labeling each of the images to the outside. The method of claim 2, The display unit includes a R phase LED (LED), S phase LED (LED) and T phase LED (LED) characterized in that it comprises a. The method of claim 1, The imaging system, characterized in that the phase of the voltage used in the equipment line is single phase or three phase. The method of claim 1, And the first mechanism is electrically coupled to the voltage draw end of the equipment line and the second mechanism is electrically coupled to the voltage draw end of the equipment line. The method of claim 5, And the second mechanism is electrically combined with the voltage drawing end via a probe. The method of claim 1, At least one of the first and second mechanisms includes a frequency modulator and a power line three-phase coupler.

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