KR-102963432-B1 - Power distribution board with electric shock prevention and monitoring functions

Abstract

The present invention relates to a switchboard equipped with functions for preventing and monitoring electric shock accidents, and is characterized by comprising: an EMF sensor module that calculates capacitance data by detecting electric field signals, magnetic field signals, and RF signals emitted from each of the high-voltage panel, low-voltage panel, motor starter panel, and distribution box constituting the switchboard in a non-contact manner; a leakage current sensor module that calculates leakage current data by measuring the leakage current flowing through the grounding wires of each of the high-voltage panel, low-voltage panel, motor starter panel, and distribution box; a PLC that stores the capacitance data and leakage current data transmitted from the EMF sensor module and the leakage current sensor module; and a monitoring unit that determines the risk of electric shock based on the capacitance data and leakage current data transmitted from the PLC, outputs a visual warning signal, and generates and stores related data in a log format.

Inventors

• 정준호
• 소윤섭
• 송보미
• 전명곤
• 최민규
• 전민영

Assignees

• 주식회사 에스엠전자

Dates

Publication Date

20260513

Application Date

20250602

Claims (6)

1. An EMF sensor module that calculates capacitance data by detecting electric field signals, magnetic field signals, and RF signals emitted from each of the high-voltage panel, low-voltage panel, motor starting panel, and distribution box constituting the switchboard in a non-contact manner; A leakage current sensor module that measures the leakage current flowing through the grounding wires of each of the above-mentioned high-voltage panel, low-voltage panel, motor starting panel, and distribution box, and calculates leakage current data; A PLC that stores capacitance data and leakage current data transmitted from the above EMF sensor module and leakage current sensor module; and A monitoring unit that determines the risk of electric shock based on capacitance data and leakage current data transmitted from the above PLC, outputs a visual warning signal, and generates and stores related data in a log format; The above EMF sensor module detects an electric field signal, a magnetic field signal, and an RF signal, respectively, through an electric field sensor unit that detects an electric field including a straight conductive antenna, a magnetic field sensor unit that detects a magnetic field composed of a resonant circuit including an inductor and an operational amplifier (OPAMP), and an RF sensor unit that detects an RF signal composed of a zigzag line pattern and a capacitor. A switchboard equipped with electric shock accident prevention and monitoring functions, characterized in that the EMF sensor module comprises a signal detection unit that detects electric field signals, magnetic field signals, and RF signals, a signal amplification unit that amplifies the detected signals, an A/D converter that converts analog signals into digital signals, and an MCU that analyzes the magnetic field signals and RF signals to calculate changes in capacitance through a capacitance estimation algorithm and estimates information on the location of the risk of electric shock.
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3. In paragraph 1, A switchboard equipped with electric shock accident prevention and monitoring functions, characterized by further including a seismic device that detects changes in voltage generated when a disconnection occurs in a cable through a disconnection detection unit to determine whether seismic resistance is present.
4. In paragraph 1, The above monitoring unit is, A date/time display unit that displays the system's operation reference point in real time, and A monitoring mode setting unit for selecting a monitoring mode of the above system or checking the monitoring status, and A monitoring mode setting unit capable of changing to hybrid mode (simultaneous monitoring of capacitance and leakage current), capacitance mode (monitoring only capacitance abnormalities), and leakage mode (monitoring only leakage current abnormalities), and A risk diagnosis unit that intuitively visualizes the overall risk level of the above system status, and An integrated information unit that comprehensively checks the overall status of the above system, and A capacitance and leakage trend unit that displays the trends of capacitance (Vac) and leakage current (mA) of each panel (high-voltage panel, low-voltage panel, motor starter panel, distribution box) measured by the EMF sensor module unit and the leakage current sensor module unit in a time series, and A history inquiry unit for querying alarm history and alarm message records of capacitance and leakage current by date, and A switchboard equipped with an electric shock accident prevention and monitoring function, characterized by including an alarm setting unit that specifies the alarm level range of the above-mentioned capacitance (Vac) and leakage current (mA).
5. In paragraph 4, The above integrated information department is, A main detection information unit displaying disturbance capacitance information, leakage current information, seismic cable disconnection status, and capacitance and leakage detection location information, and A switchboard equipped with electric shock accident prevention and monitoring functions, characterized by including a diagnostic module information unit that displays the number, power outage value, and leakage value for each panel (high-voltage panel, low-voltage panel, motor starter panel, distribution box) in a table format in real time.
6. In paragraph 4, The above alarm setting unit is, A capacitance alarm setting unit that sets risk levels according to capacitance (Vac) by interval (Safe: 0~10Vac, Interest: 11~30Vac, Caution: 31~50Vac, Warning: 51~75Vac, Severe: 76~100Vac), and A switchboard equipped with electric shock accident prevention and monitoring functions, characterized by including a leakage current alarm setting unit that sets a danger zone according to leakage current (mA) (Safe: 0~1mA, Interest: 2~5mA, Caution: 6~10mA, Warning: 11~15mA, Severe: 15~20mA).

Description

Power distribution board with electric shock prevention and monitoring functions The present invention relates to a switchboard equipped with a function for preventing and monitoring electric shock accidents, and more specifically, to a switchboard equipped with a function to prevent electric shock accidents in advance and to monitor the risk of electric shock in real time. Generally, switchboards consist of high-voltage panels, low-voltage panels, motor starter panels, and distribution boxes; as core electrical equipment that distributes and protects high-voltage electricity to homes, commercial buildings, factories, and other facilities, they operate at high voltage at all times. In such switchgear, an electromagnetic field may form on the surface of the enclosure or the electric potential may rise due to internal insulation damage, poor grounding, or electromagnetic interference. In this situation, there is a high risk of electric shock if a user comes into contact with the enclosure. Existing electric shock prevention systems for switchgear are primarily limited to measuring grounding status or insulation resistance, and currently lack real-time risk detection or remote monitoring capabilities. FIG. 1 is a configuration diagram showing a switchboard equipped with electric shock accident prevention and monitoring functions according to the present invention. FIG. 2 is a configuration diagram showing an EMF sensor module according to the present invention. FIG. 3 is a configuration diagram showing a leakage current sensor module according to the present invention. FIG. 4 is a circuit diagram showing a wire break detection unit of a seismic isolation device according to the present invention. FIG. 5 is a screen configuration diagram showing a monitoring unit and a comprehensive information unit of the monitoring unit according to the present invention. FIG. 6 is a screen configuration diagram showing the capacitance trend section of the monitoring unit according to the present invention. FIG. 7 is a screen configuration diagram showing the history inquiry unit of the monitoring unit according to the present invention. FIG. 8 is a screen configuration diagram showing the alarm setting unit of the monitoring unit according to the present invention. FIG. 9 is a screen configuration diagram showing the service information section of the monitoring unit according to the present invention. Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Then, a preferred embodiment of a switchboard equipped with electric shock accident prevention and monitoring functions according to the present invention will be described in detail. FIG. 1 is a configuration diagram showing a switchboard equipped with electric shock accident prevention and monitoring functions according to the present invention; FIG. 2 is a configuration diagram showing an EMF sensor module according to the present invention; FIG. 3 is a configuration diagram showing a leakage current sensor module according to the present invention; FIG. 4 is a circuit diagram showing a wire break detection unit of an earthquake-resistant device according to the present invention; FIG. 5 is a screen configuration diagram showing a monitoring unit and a comprehensive information unit of the monitoring unit according to the present invention; FIG. 6 is a screen configuration diagram showing a capacitance trend unit of the monitoring unit according to the present invention; FIG. 7 is a screen configuration diagram showing a history inquiry unit of the monitoring unit according to the present invention; FIG. 8 is a screen configuration diagram showing an alarm setting unit of the monitoring unit according to the present invention; and FIG. 9 is a screen configuration diagram showing a service information unit of the monitoring unit according to the present invention. Referring to FIG. 1, a power distribution board equipped with electric shock accident prevention and monitoring functions according to the present invention may be configured to include an EMF sensor module (100), a leakage current sensor module (200), a PLC (300), and a monitoring unit (400). The EMF sensor module (100) can detect electric field signals, magnetic field signals, and RF (Radio Frequency) signals emitted from each of the high-voltage panel, low-voltage panel, motor starter panel, and distribution box constituting the switchboard (10) in a non-contact manner, and can calculate capacitance data based on the detected signals and transmit it to the PLC (300). Here, the PLC (300) can be installed inside the high-voltage panel. The EMF sensor module (100) can detect an electric field signal, a magnetic field signal, and an RF signal, respectively, through an electri