KR20220093532A - Direct current cut-off device(PCR) inspection kit and its operation method - Google Patents

Abstract

The present invention relates to a direct current (DC) blocking device (PCR). The present invention comprises: a temporary power generation unit configured to generate power so that a potential difference occurs between both ends thereof; a power selection unit which selects and provides power so that power which meets the specifications of the DC blocking device is supplied; measurement terminal units connected to both ends of the DC blocking device to measure currents when inspecting the DC blocking device; and a circuit protection unit disposed between the power selection unit and the measurement terminal units and composed of a fuse to prevent overcurrent from occurring when DC blocking device is in operation. The present invention is capable of preventing electric shock from occurring to a worker and any damage to facilities caused by the inflow of abnormal currents by inspecting whether the DC blocking device is in normal operation and discharges the abnormal currents to the ground under the corresponding conditions when the abnormal currents flow thereinto.

Description

Direct current cut-off device (PCR) inspection kit and its operation method

The present invention relates to a DC current breaker inspection kit and an operating method thereof, and more particularly, to a DC current breaker inspection kit capable of checking whether an abnormal current is normally discharged to the ground when an abnormal current is introduced.

Currently, it is common to manage pipelines and natural gas pipelines buried underground in the management office using the external power method to prevent corrosion due to electrical interference. In order to operate this efficiently, various types of corrosion protection facilities are being operated, and insulation facilities (IJ) and DC current interrupters (PCR) are installed in the management office to prevent corrosion current from leaking to non-corrosive objects and grounding facilities. have.

Check the DC current interrupter (PCR) by measuring the potential difference and leakage current at both ends of the voltmeter (Multi-Tester) and the leakage current meter (Clamp-Meter). However, the function of the DC Current Interrupter (PCR) has a function to discharge to the grounding facility and the opposite side when an abnormal current occurs along with a blocking function, so two functions must be checked. However, at present, only the blocking function by measuring the potential difference is checked, and the discharge function is not checked when an abnormal current occurs. As the operating conditions of the DC current breaker, DC has a potential difference of -3V, -6V, -12V or less to +1V, +6V, or +12V or more at both ends. I have a problem that is difficult to do.

The problem to be solved by the present invention is to provide a DC current breaker check kit capable of checking whether an abnormal current is normally discharged to the ground when an abnormal current is introduced into the DC current breaker, and an operation method thereof to secure the soundness of a gas pipe buried underground, It is possible to prevent an electric shock accident and equipment damage caused by the inflow of abnormal current.

The DC current breaker check kit according to an embodiment of the present invention selects a temporary power generator that generates power to generate a potential difference between both ends of the DC current breaker, and a power source to apply power that meets the specifications of the DC current breaker A power selector that provides power by the A circuit protection unit composed of a fuse is provided to prevent overcurrent from occurring.

According to the present invention, when an abnormal current is introduced, it is possible to prevent an electric shock accident and equipment damage by an operator by checking whether the DC current breaker operates normally under the corresponding conditions and the abnormal current is discharged to the ground.

In addition, there is an effect of securing the soundness of the gas pipe buried underground by always maintaining an appropriate anticorrosive current for preventing corrosion of the gas pipe buried underground.

1 is a circuit diagram of a DC current interrupter check kit according to an embodiment of the present invention.
2 is a flowchart illustrating a method of operating a DC current interrupter check kit according to an embodiment of the present invention.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in this specification are only exemplified for the purpose of explaining the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention These may be embodied in various forms and are not limited to the embodiments described herein.

Since the embodiments according to the concept of the present invention may have various changes and may have various forms, the embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all modifications, equivalents or replacements included in the spirit and scope of the present invention.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described herein exists, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

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

1 is a circuit diagram of a DC current interrupter check kit according to an embodiment of the present invention.

Referring to FIG. 1 , the DC current interrupter check kit 10 includes a temporary power generator 110 , a power selection unit 120 , a circuit protection unit 130 , a measurement terminal unit 140 , and an operation status display unit 150 ). is composed of

The temporary power generating unit 110 generates power to generate a potential difference across the DC current blocking device. Temporary power generator 110 connects DC 9V × 2 in series to satisfy DC ±12V, which is the maximum operating voltage of the DC current breaker, and supplies DC ±18V to the DC current breaker.

Temporary power generation unit 110 generates power by dividing the operating voltage into DC ±3V (for grounding/GR) and ±6V/±12V (for insulation equipment protection/IJP), and receives DC ±18V supplied primarily A DC voltage regulator is used to create a potential difference that meets the operating conditions of the DC current breaker.

The power selection unit 120 provides power by selecting a power source to apply power that meets the specifications of the DC current blocking device. The power selection unit 120 is disposed between the temporary power generation unit and the circuit protection unit. The power selection unit 120 includes two constant voltage ICs, a plurality of capacitors, resistors, and diodes.

The circuit protection unit 130 is disposed between the power selection unit and the measurement terminal unit, and is configured as a fuse to prevent overcurrent from occurring when the DC current breaker is operated. In the circuit protection unit 130, the current generated by the DC current breaker is weak, but when the DC current breaker operates, the current flowing into the inspection kit from the gas pipe and equipment is larger than this and there is a risk that the inspection kit may be damaged, such as resistors, fuses, etc. Protect the circuit from overcurrent by using the

The measurement terminal unit 140 is connected to both ends of the DC current blocking device during inspection to measure the current. Temporary power must be applied to both ends of the connection terminals to create the operating conditions of the DC current interrupter (PCR). That is, the measurement terminal unit 140 is a lead wire for electrically connecting the DC current breaker and the inspection kit, and the tip is manufactured in the form of tongs to facilitate inspection by one person and to prevent an electric shock accident.

The operation state display unit 150 is provided with an LED light emitting device and displays to confirm the operation state of the DC current blocking device. In the operation state display unit 150, when the DC current cut-off device becomes an operating condition due to the inflow of an abnormal current, the DC current cut-off device is operated and the abnormal current is discharged to the ground through the DC current cut-off device, and the proper potential of the gas pipe is maintained. At this time, when the DC current breaker is operated, the status can be displayed with a lamp (LED), a buzzer, an ammeter, and the like.

2 is a flowchart illustrating an operation method of a DC current interrupter check kit according to an embodiment of the present invention.

Referring to FIG. 2 , the operation method of the DC current breaker check kit is to first detect a current (S101), check whether the DC current breaker operates under the corresponding conditions when an abnormal current is introduced, and check whether the abnormal current is discharged to the ground. Check (S105). The corresponding condition is that the potential difference between both ends is less than -3V, -6V, -12V and +1V, +6V, +12V or more for DC.

Conventionally, it was only checked whether the current was cut off (insulated) by measuring the potential difference between both ends of the DC current interrupter (PCR) with a voltmeter (multi-tester). By checking whether the current interrupting device (PCR) operates normally and the abnormal current is discharged to the ground, the corrosion protection current for corrosion prevention of the gas pipe buried underground is always maintained properly, thereby securing the soundness of the gas pipe buried underground In addition, it is possible to prevent an electric shock accident and equipment damage caused by an abnormal current inflow.

Although the embodiment shown in the drawings of the invention has been described with reference to this, it is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10; DC current interrupter check kit 110; Temporary power generator
120; power selection unit 130; circuit protection
140; measuring terminal unit 150; operation status display

Claims (2)

In the DC current breaker check kit,
Temporary power generation unit for generating power to generate a potential difference across both ends of the DC current breaker;
a power selector that selects a power source to apply power that meets the specifications of the DC current breaker and provides power; and
a measuring terminal unit connected to both ends of the DC current breaker to measure the current when checking the DC current breaker; and
A DC current breaker inspection kit disposed between the power selection unit and the measurement terminal unit, and having a circuit protection unit composed of a fuse to prevent overcurrent from occurring when the DC current breaker is operated.
According to claim 1,
The temporary power generating unit,
The operating voltage is divided into DC ±3V (for grounding/GR) and ±6V/±12V (for insulation equipment protection/IJP) to generate power, and receives the primary DC ±18V and uses a DC voltage regulator to direct current A DC current breaker check kit that creates a potential difference that matches the operating conditions of the breaker.

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