KR100266379B1 - Underground line phase measurement apparatus - Google Patents

Abstract

PURPOSE: An apparatus for measuring phase of underground lines is provided to prevent failure generation of the lines by measuring phase of the lines exactly upon opening operation of the underground lines. CONSTITUTION: The first comparator(10) compares ground potential of the underground lines with reference potential. The second comparator(20) compares the signal for the ground potential with potential of measurement line. The third comparator(30) compares the signal for the ground potential with potential of reference line. The first and second invertor(40,50) inverts the output signals from the second and third comparator(20,30). The first flipflop(60) is supplied with the output signal from the first invertor as clock signal and the data signal from the any output terminal of the second invertor and executes internal operation for them. The second flipflop(70) is supplied with the output signal from the second invertor as clock signal and the data signal from the any output terminal of the first invertor and executes internal operation for them. The drive(80) analyzes the output signals from the first and second flipflops(60,70) and detects and displays the information for the underground lines.

Description

Underground line measuring device

The present invention relates to a phase measurement and verification device of underground lines, and more particularly, to detect the leakage magnetic field generated from the connection point of the underground line or the elbow of the PAD switch so that the difference between the phase vector and the inspection can be performed simultaneously. One underground line measuring apparatus is described.

In general, due to the nature of the underground line, since no exposed part of the live part occurs, the phase measuring instrument used in the overhead line cannot be used, and there is no system currently capable of performing phase measurement on the underground line.

In addition, in the case of stick-type PAD switch, elbow separation is possible to perform live work, but it is mainly installed in the downtown, and the space of the body is so narrow that it is impossible to perform live work for phase check because it is impossible to secure a safety separation distance.

Therefore, the phase check and inspection work on underground lines is currently dependent on the operator's naked eye. Therefore, in case of long-term construction or renovation of underground lines, it is necessary to change the existing brand type and pressurize the system after misunderstanding. There was a problem caused.

In particular, there was a problem of causing complaints such as regional power outages by causing a lot of D / L track failures when the system was changed due to a misunderstanding of phase checking.

In addition, when multiple lines are installed during the cease-fire work of underground lines, there is a problem that it is impossible to inspect before work, causing safety accidents such as electric shocks. There was a problem that caused a failure.

The present invention has been made in view of the above-mentioned general problems, and an object thereof is to implement a portable measuring device which enables a phase measuring operation for underground lines in the absence of live work. It provides accurate phase measurement work during work to prevent the occurrence of line breakdown in advance, and to prevent the occurrence of safety accidents such as electric shocks by detecting whether the cable is active or not during the ceasefire work of underground lines. .

1 is a circuit diagram of an underground line measuring device according to an embodiment of the present invention.

The present invention for achieving the above object is the first comparison means for comparing the ground potential of the underground line applied to one terminal and the reference potential set in the other one terminal;

Second comparing means for comparing a signal for a ground potential applied to one terminal in the first comparing means with a potential of a measuring line applied smoothly to a resistor and a diode at the other terminal;

Third comparing means for comparing a signal for a ground potential applied to one terminal in the first comparing means with a potential of a reference line applied smoothly to the other terminal;

First inverting means for inverting a phase of the signal output from the second comparing means;

Second inverting means for inverting the phase of the signal output from the third comparing means;

First logic operation means for receiving the output signal of the first inverting means as a clock signal (CK), the arbitrary output terminal signal in the second inverting means is applied as a data signal (D) to execute the operation according to the internal logic and;

A second logic operation for receiving an output signal of the second inverting means as a clock signal CK and receiving an arbitrary output terminal signal in the first inverting means as a data signal D to execute an operation according to internal logic; Means;

Control and driving means for analyzing information applied by the first and second logic calculating means to detect information on the underground line;

Switching means switched according to a signal applied from said control and driving means;

It is characterized in that it comprises a indicating means for lighting the information on the underground line is turned on in accordance with the contact selection of the switching means.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As can be seen in Figure 1, the underground line phase measurement apparatus according to an embodiment of the present invention, the ground potential of the underground line applied to one terminal is set to the resistor (R7) and the resistor (R8) at the other terminal A first comparator 10 for comparing a reference potential and then outputting a signal in a "low" or "high" state, and a signal and a resistance for the ground potential output from the first comparator 10 and applied to one terminal ( A second comparator 20 which smoothes the R1) R2 and the diodes D1 and D2 and compares the potential of the measurement line applied to the other terminal to output a signal of a "low" or "high" state, The signal of the ground potential output from the first comparator 10 and applied to one terminal and the potential of the reference line smoothed to the resistors R3, R4, and diode D3, D4 and applied to the other terminal. Outputs a signal in "low" or "high" state in comparison The three comparators 30 and the signals output from the second comparator 20 are inverted in phase through a predetermined number, preferably three inverters INV1-INV3, and at the same time inducing a delay of the output signals. The first and second inverters 40 and the signals output from the third comparator 30 are outputted at the same time as the phase is inverted through a predetermined number, preferably three inverters INV4-INV6. A second inverting unit 50 for performing forward movement of the signal, and a signal applied through the first inverting unit 40 are applied as a clock signal CK, and a second inverter in the second inverting unit 50 ( The first deflip-flop 60 and the second inverting unit 50, which receive the output signal of INV5 as the data signal D, perform an operation according to internal logic, and output a signal thereof. Is applied as the clock signal CK, and the output signal of the first inverter INV1 in the first inverting unit 40 is converted into a data signal. A first deflip-flop 70 that is applied to (D) and executes an operation according to internal logic and outputs a predetermined signal thereof; Receiving a signal to analyze the information on the underground line, and the driver 80 for driving the display of the analyzed information, and a plurality of switches that are switched in accordance with the signal output from the driver 80 to the base terminal, preferably Is composed of three NPN type switching transistors Q1, Q2 and Q3, and green, yellow, and red, and blinks in accordance with signals applied from each of the transistors Q1, Q2 and Q3. It consists of a plurality of lamps (LED1-LED3) which indicate a state of, preferably three.

Referring to the operation of performing the phase measurement of the underground line using the present invention having the function as described above is as follows.

First, a plug of a measurement terminal of a predetermined color, for example, black, a plug of a reference potential measurement terminal of red, and a plug of a ground potential measurement terminal of blue, are connected to a cable of an underground line to be measured. When the first comparator 10 compares the ground potential of the underground line applied to one terminal and the reference potential set to the resistor R7 and the resistor R8 at the other terminal, the first comparator 10 is in a "low" or "high" state. The signal is output and applied to one terminal of the second and third comparators 20 and 30.

At this time, the second comparator 20 is smoothed by the signal for the ground potential applied to the one terminal of the first comparator 10 and the resistors R1 (R2) and the diode D1 (D2) and applied to the other one terminal. The signal of the "low" or "high" state is output and applied to the first inverting section 40 in comparison with the potential of the measuring line.

In addition, the third comparator 30 is smoothed by the signal of the ground potential applied from the first comparator 10 to one side terminal, the resistors R3 (R4), and the diode D3 (D4) to the other terminal. The potentials of the reference lines to be applied are compared to output signals of a "low" or "high" state and applied to the second inverting unit 50 side.

The first inverter 40 adjusts the timing of the signal transmitted by inverting a phase through a predetermined number of signals output from the second comparator 20, preferably through three inverters INV1-INV3. To the first deflip-flop 60 as a clock signal CK, and the second inverting unit 50 outputs a predetermined number of signals output from the third comparator 30, preferably three inverters ( The phase inversion is performed through INV4-INV6) to adjust the timing of the transmitted signal and apply it as a clock signal to the second flip-flop 70 side.

In the first deflip-flop 60, the output signal of the second inverter INV5 in the second inverting unit 50 is the data signal D while the clock signal CK is applied from the first inverting unit 40. ), The operation is executed according to the set internal logic and the signal for the same is applied to the drive 80.

In addition, in the second deflip-flop 70, the output signal of the first inverter INV1 in the first inverting unit 50 is a data signal while the clock signal CK is applied from the second inverting unit 50. When applied to (D), the operation is executed according to the set internal logic, and a signal thereof is applied to the drive 80 side.

In this case, the drive 80 analyzes the signals applied from the first and second deflip-flops 60 and 70 to detect information on the underground line, and then selects any transistor according to the detected ground line data. Outputs a signal of "low" or "high" to the base end of (Q1) (Q2) (Q3) and turns on the lamps (LED1-LED3) by switching the transistors (Q1) (Q2) (Q3) to generate an arbitrary Display the results of phase measurements on underground lines.

As described above, the present invention enables accurate phase check during system operation of underground lines, and prevents the failure of the lines in advance. Are excluded to provide stability and reliability.

Claims (4)

First comparing means for comparing the ground potential of the underground line applied to one terminal with a reference potential set at the other terminal; Second comparing means for comparing a signal for a ground potential applied to one terminal in the first comparing means with a potential of a measuring line applied smoothly to a resistor and a diode at the other terminal; Third comparing means for comparing a signal for a ground potential applied to one terminal in the first comparing means with a potential of a reference line applied smoothly to the other terminal; First inverting means for inverting a phase of the signal output from the second comparing means; Second inverting means for inverting the phase of the signal output from the third comparing means; First logic operation means for receiving the output signal of the first inverting means as a clock signal (CK), the arbitrary output terminal signal in the second inverting means is applied as a data signal (D) to execute the operation according to the internal logic and; A second logic operation that receives an output signal of the second inverting means as a clock signal CK, receives an arbitrary output terminal signal in the first inverting means as a data signal D, and executes an operation according to internal logic; Means; Control and driving means for analyzing information applied by the first and second logic calculating means to detect information on the underground line; Switching means switched according to a signal applied from said control and driving means; Underground line phase measurement apparatus characterized in that it comprises a indicating means for lighting the information on the underground line is turned on in accordance with the contact selection of the switching means. The underground line phase measurement apparatus according to claim 1, wherein the first and second inverting means comprise a plurality of inverters to adjust phase inversion and timing of signal transmission. The phase applied to the data signal (D) of the first logical operation means is a phase difference of 180 ° from the clock signal by inputting a signal output from the second inverter of the second inverting means. Underground line phase measurement device. The phase applied to the second logic calculating means as a data signal D has a phase difference of 180 ° from the clock signal by inputting a signal output from the third inverter of the first inverting means. Underground line phase measurement device.