KR102725187B1 - Electrical safety alarm - Google Patents

Abstract

The present invention discloses an electrical safety alarm. The present invention is configured such that a detachable alarm terminal is coupled to a power facility panel, and then a wireless sensor unit is connected thereto via a cable of a predetermined length, thereby easily alerting a worker who approaches to operate or perform maintenance work on the power facility of the current status within the power facility, thereby preventing various safety accidents, and making it simpler to install an electrical safety alarm in the power facility.

Description

Electrical safety alarm

The present invention relates to an electrical safety alarm applied to power facilities (e.g., distribution/switchboards, motor control panels, branch panels, etc.), and more specifically, to an electrical safety alarm formed in the form of a terminal that can be detachably attached to a power facility panel and detects and alarms the state of electricity supply within the power facility.

In general, high voltage or high current flows through the internal power supply lines of power facilities such as distribution panels, motor control panels, and branch panels, so when workers operate or perform maintenance work on power facilities, they may be at risk of electric shock or burns if they come into contact with the power supply lines.

Accordingly, fixed or portable electrical safety alarms have been provided to warn workers approaching power equipment of the risk of electric shock to prevent accidents such as electric shock or burns caused by the worker's carelessness.

The above-mentioned fixed-type electric safety alarm is formed in the form of a capacitive band or bar having a constant electrostatic induced voltage according to an electric field, as in Patent Publication No. 10-0544916, inside a power facility, and is installed close to the secondary side of an incoming switch of a power facility (e.g., distribution/distribution board) so as to detect an electrostatic induced voltage due to an electric field formed when the secondary side of the incoming switch is energized, or as in Patent Publication No. 10-1362792, an epoxy insulator having a built-in electrostatic capacitance detection sensor for detecting electrostatic capacitance is connected to a busbar for power distribution inside a power facility, and the electrostatic capacitance detection sensor is electrically connected using a wired line to an alarm lamp provided on the front display panel of the power facility.

However, the electrical safety alarm method of electrically connecting wire lines inside the power facility as described above or arranging them adjacent to the secondary side of the inlet switch at a predetermined distance has the disadvantage of being difficult to install when the internal space of the power facility is narrow, and in particular, the electrical connection has the inconvenience of being complicated in the wiring work.

Meanwhile, the portable electric safety alarm is carried by hand or attached to a hard hat, wrist, or forearm and sounds an alarm when the distance from the track is within a predetermined range, and this is disclosed in Patent Publication No. 10-2021-0155243.

However, conventional electric safety alarms are inconvenient to use because they must be carried separately by an individual or attached to a hard hat, wrist, or forearm. In particular, there is a high risk of loss when a worker carries and uses the alarm, and there is a problem that the battery is easily consumed.

Patent Registration No. 10-0544916 (Publication Date: January 24, 2006) Patent Registration No. 10-1362792 (Publication Date: February 13, 2014) Publication date of patent publication No. 10-2021-0155243 (published on December 22, 2021)

The problem to be solved by the present invention is to provide an electric safety alarm that, by configuring a detachable alarm terminal to be attached to a power facility panel and then connecting a wireless sensor unit thereto via a cable of a predetermined length, alerts a worker approaching the power facility to the state of electricity supply within the power facility to operate the power facility or perform maintenance work, thereby preventing various safety accidents that may occur, and making it easier to install the electric safety alarm in the power facility.

The electrical safety alarm, which is a means for solving the problem of the present invention, comprises: an alarm terminal which is detachably connected to a panel of a power facility, and which has a panel connection portion, a power connection terminal, and a sensor connection terminal; a wireless sensor portion which is connected to the alarm terminal using a cable having a connection jack and detects a three-phase induced voltage caused by a magnetic field generated in a line in the power facility; a control circuit portion which is formed in the alarm terminal and electrically connected to the wireless sensor portion, and determines whether to generate an alarm according to the three-phase induced voltage detected by the wireless sensor portion; and an information notification portion which is controlled by the control circuit portion and which displays an alarm signal corresponding to a dangerous situation; wherein the wireless sensor portion is variably arranged at a predetermined position in the power facility by the cable having a predetermined length.

In addition, the control circuit unit compares the three-phase induced voltage detected by the wireless sensor unit with a set reference voltage, and controls the information notification unit when the three-phase induced voltage exceeds the set reference voltage.

In addition, the information notification unit includes an alarm signal output unit that outputs an alarm signal corresponding to a dangerous situation through a speaker by the control circuit unit when the three-phase induced voltage wirelessly detected by the wireless sensor unit exceeds a set reference voltage; and at least one voltage display lamp formed on one surface of the alarm terminal and controlled to be turned on by the control circuit unit when the three-phase induced voltage wirelessly detected by the wireless sensor unit exceeds a set reference voltage.

In addition, the voltage display lamp includes a first phase voltage display lamp that lights up when the first phase voltage detected by the wireless sensor unit exceeds the reference phase voltage; a second phase voltage display lamp that lights up when the second phase voltage detected by the wireless sensor unit exceeds the reference phase voltage;

It includes a third phase voltage indication lamp that lights up when the third phase voltage detected by the wireless sensor unit exceeds the reference phase voltage.

In addition, the first to third phase voltage indication lamps are each connected in parallel to the control circuit section in multiple units so that a light amount having a distinguishing characteristic is displayed when the phase voltage is detected by the wireless sensor section.

In addition, a test button for checking the lighting status of the voltage display lamp is formed on one side of the alarm terminal, and while the test button is pressed, the control circuit controls the lighting or flashing of the voltage display lamp.

In addition, the blinking control of the voltage display lamp by the control circuit unit is performed alternately.

In addition, an alarm signal adjustment unit for adjusting the output level of the alarm signal through the speaker is formed on one side of the alarm terminal.

In addition, a sensitivity adjustment unit for adjusting the sensitivity of the three-phase induced voltage detection through the wireless sensor unit is formed on one side of the alarm terminal.

In addition, the alarm terminal is provided with a communication unit whose communication is controlled by the control circuit unit, and the communication unit transmits the three-phase induced voltage detected by the wireless sensor unit when it exceeds the reference voltage to a monitoring terminal at a set remote location.

In this way, the present invention is configured so that a detachable alarm terminal is attached to a power facility panel, and then a current wireless sensor unit is connected thereto via a cable of a predetermined length. Through this, it is expected that the current status within the power facility can be easily alerted to a worker approaching to operate the power facility or perform maintenance work, thereby preventing safety accidents and making it easier to install an electrical safety alarm in the power facility.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Figure 1 is a perspective view showing the terminal structure of an electric safety alarm according to an embodiment of the present invention.
Figure 2 is a perspective view showing a state in which a wireless sensor unit is connected to an alarm terminal via a cable according to an embodiment of the present invention.
Figure 3 is a schematic block diagram of an electric safety alarm according to an embodiment of the present invention.
Figure 4 is a structural diagram showing a state in which an electrical safety alarm is installed on a power equipment panel according to an embodiment of the present invention.

The advantages and features of the present invention, and the method for achieving them, will become clear with reference to the embodiments described in detail below together with the accompanying drawings. However, the technical idea of the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the present embodiments are provided only to make the disclosure of the present invention complete and to fully inform a person having ordinary skill in the technical field to which the present invention belongs of the scope of the invention, and the technical idea of the present invention is defined only by the scope of the claims.

The terminology used herein is for the purpose of describing embodiments only and is not intended to limit the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase.

In this specification, it should be understood that terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

In addition, the embodiments described in this specification will be described with reference to cross-sectional and/or plan views, which are ideal examples of the present invention. Therefore, the embodiments of the present invention are not limited to the specific forms illustrated, but include changes in the forms as needed. For example, the regions illustrated at right angles may be rounded or have a shape with a predetermined curvature. Accordingly, the regions illustrated in the drawings have a schematic nature, and the shapes of the regions illustrated in the drawings are intended to illustrate specific forms of regions of the device and are not intended to limit the scope of the invention.

Throughout the specification, the same reference numerals refer to the same components. Accordingly, the same reference numerals or similar reference numerals may be described with reference to other drawings, even if they are not mentioned or described in the drawings. In addition, even if the reference numerals are not indicated, they may be described with reference to other drawings.

Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings.

FIG. 1 is a perspective view showing the terminal structure of an electric safety alarm according to an embodiment of the present invention, FIG. 2 is a perspective view showing a state in which a wireless sensor unit is connected to an alarm terminal via a cable according to an embodiment of the present invention, FIG. 3 is a schematic block diagram of an electric safety alarm according to an embodiment of the present invention, and FIG. 4 is a structural diagram showing a state in which an electric safety alarm according to an embodiment of the present invention is installed on a power equipment panel.

Referring to the attached drawings 1 to 4, an electrical safety alarm (100) according to an embodiment of the present invention is a device for monitoring, controlling, protecting, etc. an electrical system, and is composed of mechanisms such as instruments, relays, and switching devices, and structures and busbars and wires connecting between the mechanisms, and is detachably connected to a panel (200) of a power facility, which may be any one of a distribution board, a receiving board, a motor control board (MCC), and a distribution board, having a three-phase, three-wire (R,S,T) or three-phase, four-wire (R,S,T,N) wiring structure, and is controlled by a control circuit unit (30), and includes an alarm terminal (10), a wireless sensor unit (20), the control circuit unit (30), and an information notification unit (40).

The above alarm terminal (10) is a box-shaped structure with a panel joint part (11) formed protrudingly and having fastening holes (not shown) at both ends so that it can be detachably attached to a panel (200) of a power facility, and has a power connection terminal (12) and a sensor connection terminal (13) that are electrically connected to the control circuit part (30).

Here, the alarm terminal (10) can be fixed to the panel (200) of the power equipment by using a screw to attach the alarm terminal (10) to the surface of the panel (200) of the power equipment, or by forming an opening (not shown) in the panel (200) of the power equipment and then fixing the alarm terminal (10) therein while fastening the screw to the panel attachment portion (11), and in this case, the front of the alarm terminal (10) can be exposed to the outside of the panel (200) of the power equipment.

The wireless sensor unit (20) above is connected to a cable (21) of a predetermined length having a connecting jack (21a), and by connecting the connecting jack (21a) to the sensor connecting terminal (13), an electrical connection is made with the control circuit unit (30), and after detecting the induced voltage of three phases (R, S, T) due to a magnetic field generated in a line in the power facility, it provides this to the control circuit unit (30).

That is, the wireless sensor unit (20) receives a wireless magnetic field generated from a line in a power facility, filters a frequency corresponding to a predetermined frequency (e.g., 60 Hz) from the received wireless magnetic field, extracts a three-phase induced voltage with high-frequency components removed, and provides the extracted three-phase induced voltage to the control circuit unit (30). Accordingly, a known filter unit (not shown) may be configured in the wireless sensor unit (20).

For example, the filter unit first filters a frequency corresponding to 60 Hz in a wireless magnetic field (or wireless electromagnetic wave), performs a second filtering to remove a DC component from the first filtered signal, and then removes a high-frequency component from the second filtered signal to extract a three-phase induced voltage and provide it to the control circuit unit (30). This is conventional and a detailed description thereof will be omitted below.

The above control circuit unit (30) is formed within the alarm terminal (10) which is a box structure, and determines whether or not an alarm is generated based on the three-phase induced voltage detected by the wireless sensor unit (20) to which electrical connection is made.

That is, the control circuit unit (30) compares the three-phase induced voltage detected by the wireless sensor unit (20) with a set reference voltage, and when the three-phase induced voltage exceeds the set reference voltage, controls the information notification unit (40) to display an audible or visual alarm signal to a worker approaching the power facility.

The above information notification unit (40) is controlled by the control circuit unit (30), displays an alarm signal corresponding to a dangerous situation, and includes an alarm signal output unit (41) and a voltage display lamp (42).

The above alarm signal output unit (41) is configured in the above control circuit unit (30), and when the three-phase induced voltage wirelessly detected through the above wireless sensor unit (20) exceeds the set reference voltage, an alarm signal corresponding to a dangerous situation is output to the outside through a speaker (SP) so that a worker approaching the power facility can hear it.

The voltage display lamp (42) is formed to be exposed on one side of the alarm terminal (10) and is controlled to be turned on by the control circuit unit (30) when the three-phase induced voltage wirelessly detected by the wireless sensor unit (20) exceeds the set reference voltage. Accordingly, a worker approaching the power facility can visually confirm the lighting of the voltage display lamp (42) and prevent accidents such as electric shock due to approach.

Here, the voltage display lamp (42) includes a plurality of first phase voltage display lamps (L1, L1') connected in parallel and turned on when the first phase voltage (R phase) detected by the wireless sensor unit (20) exceeds the reference phase voltage, a plurality of second phase voltage display lamps (L2, L2') connected in parallel and turned on when the second phase voltage (S phase) detected by the wireless sensor unit (20) exceeds the reference phase voltage, and a plurality of third phase voltage display lamps (L3, L3') connected in parallel and turned on when the third phase voltage (T phase) detected by the wireless sensor unit (20) exceeds the reference phase voltage.

Meanwhile, the reason why the first to third phase voltage indication lamps (L1, L1') (L2, L2') (L3, L3') are configured in multiple numbers is to ensure that a light intensity having a distinguishing feature is displayed when the phase voltage is detected by the wireless sensor unit (20).

Accordingly, when the first to third phase voltage indication lamps (L1, L1') (L2, L2') (L3, L3') are lit, workers can easily determine whether the three-phase induced voltage in the lines in the power facility is normal or abnormal, thereby avoiding dangerous situations such as electric shock accidents during work.

Meanwhile, a test button (50) for checking the lighting status of the voltage display lamp (42; L1, L1', L2, L2', L3, L3'), an alarm signal adjustment unit (60), and a sensitivity adjustment unit (70) may be formed on one side of the alarm terminal (10).

While the above test button (50) is pressed by the operator, the control circuit unit (30) controls the lighting or flashing of the voltage display lamp (42; L1, L1', L2, L2', L3, L3'), and the flashing control of the voltage display lamp (42; L1, L1', L2, L2', L3, L3') by the control circuit unit (30) may be performed alternately.

That is, by pressing the test button (50), the worker can check on-site whether the voltage display lamp (42; L1, L1', L2, L2', L3, L3') is lighting up or flashing normally.

The above alarm signal adjustment unit (60) is a rotary structure that adjusts the output level of the alarm signal through the speaker (SP), and can be adjusted according to the external environment (e.g., noise) in which the power equipment is installed.

For example, in the case where the external environment where power equipment is installed is a noisy environment, the output level of the alarm signal can be adjusted to be increased, and in the case where the noise is small, the output level of the alarm signal can be adjusted to be decreased.

The above sensitivity adjustment unit (70) is a rotating structure that adjusts the sensitivity of the three-phase induced voltage detection through the wireless sensor unit (20), and is adjusted arbitrarily by the worker so that the three-phase induced voltage detection can be performed smoothly according to the type of power equipment.

Meanwhile, the electric safety alarm (100) according to the embodiment of the present invention may further include a communication unit (80) whose communication is controlled by the control circuit unit (30), and the communication unit (80) transmits the three-phase induced voltage detected by the wireless sensor unit (20) when it exceeds the reference voltage to the set monitoring terminal (90).

That is, while the control circuit unit (30) stores registration information on the monitoring terminal (90) that is the notification target, when the three-phase induced voltage detected by the wireless sensor unit (20) exceeds the reference voltage, the control circuit unit (30) transmits information on the dangerous situation to the monitoring terminal (90) through the communication unit (80), thereby enabling efficient remote management of the power facility.

Here, the monitoring terminal (90) may be a smart pad or smartphone carried by the manager.

Accordingly, although not shown in the drawing, the control circuit unit (30) may be a microcontroller unit (MCU) equipped with a transmission program that transmits information detected by the wireless sensor unit (20) to the monitoring terminal (90) via the communication unit (80). In this case, the monitoring terminal (90) may be equipped with an app dedicated to facility management that stores the received information when receiving information wirelessly transmitted via the communication unit (80) and displays a visual or auditory notification sound.

Here, since the power equipment is installed in various locations, the alarm terminal (10) coupled to the power equipment panel (200) is assigned an identification code according to the installation location of the power equipment and transmits information to the monitoring terminal (90) by including the identification code, and the app mounted on the monitoring terminal (90) recognizes the identification code transmitted at the same time as receiving the information transmitted from the control circuit unit (30), and then creates a folder matching the recognized identification code and stores the received information in the created folder.

Therefore, the electric safety alarm (100) according to the embodiment of the present invention can quickly respond to dangerous situations when various dangerous situations occur in the power equipment, even when the power equipment is installed at a location where the power equipment is installed and the power equipment cannot be visually confirmed.

Meanwhile, the alarm terminal (10) according to the embodiment of the present invention may further include a power indication lamp (L4) whose lighting is controlled to indicate that external power is supplied. The power indication lamp (L4) may be lit by the control circuit unit (30) when external power is supplied, and may be turned off by the control circuit unit (30) when the external power supply is cut off. However, it may also be directly connected to the external power without being controlled by the control circuit unit (30) and may be lit or turned off depending on whether the external power is supplied.

In this way, the electric safety alarm (100) according to the embodiment of the present invention can visually or audibly display various types of information through the information notification unit (40) as shown in the attached FIGS. 1 to 4, and can alert the surroundings of workers approaching to operate power equipment or perform maintenance work, thereby preventing various types of safety accidents.

Although the technical idea of the electric safety alarm of the present invention has been described above with the attached drawings, this is merely an example of the best embodiment of the present invention and does not limit the present invention.

Therefore, the present invention is not limited to the specific preferred embodiments described above, and anyone having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims, and such modifications are within the scope of the claims.

10; Alarm terminal 11; Panel joint
12; Power connection terminal 13; Sensor connection terminal
20; Wireless sensor part 21; Cable
21a; connecting jack 30; control circuit
40; Information notification section 41; Alarm signal output section
42; Voltage display lamp 50; Test button
60; Alarm signal adjustment unit 70; Sensitivity adjustment unit
80; Communications Department 90; Monitoring Terminal
100; Electrical Safety Alarm 200; Power Equipment Panel
L1, L1'; 1st phase voltage indicator lamp L2, L2'; 2nd phase voltage indicator lamp
L3, L3'; 3rd phase voltage indicator lamp L4; Power indicator lamp
SP; speaker

Claims (10)

An alarm terminal that is detachably connected to a panel of a power facility and has a panel connection portion, a power connection terminal, and a sensor connection terminal; a wireless sensor portion that is connected to the alarm terminal using a cable having a connection jack and detects a three-phase induced voltage caused by a magnetic field generated in a line in the power facility; a control circuit portion that is formed in the alarm terminal and electrically connected to the wireless sensor portion and determines whether to generate an alarm according to the three-phase induced voltage detected by the wireless sensor portion; and an information notification portion that is controlled by the control circuit portion and displays an alarm signal corresponding to a dangerous situation.
An electrical safety alarm characterized in that the wireless sensor unit is configured to be variably positioned at a predetermined location within the power facility by the cable having a predetermined length, and a sensitivity adjustment unit for adjusting the sensitivity of the three-phase induced voltage detection through the wireless sensor unit is formed on one side of the alarm terminal. In paragraph 1,
An electrical safety alarm characterized in that the control circuit unit compares the three-phase induced voltage detected by the wireless sensor unit with a set reference voltage, and controls the information notification unit when the three-phase induced voltage exceeds the set reference voltage. In the second paragraph,
The above information notification section is,
An alarm signal output unit that outputs an alarm signal corresponding to a dangerous situation through a speaker by the control circuit unit when the three-phase induced voltage wirelessly detected through the wireless sensor unit exceeds the set reference voltage; and,
An electrical safety alarm characterized by comprising: at least one voltage display lamp formed on one side of the alarm terminal and controlled to be turned on by the control circuit unit when a three-phase induced voltage wirelessly detected by the wireless sensor unit exceeds a set reference voltage; In the third paragraph,
The above voltage display lamp is,
A first phase voltage indication lamp that lights up when the first phase voltage detected by the wireless sensor unit exceeds the reference phase voltage;
A second phase voltage display lamp that lights up when the second phase voltage detected by the wireless sensor unit exceeds the reference phase voltage; and
An electrical safety alarm characterized by including a third phase voltage indication lamp that lights up when the third phase voltage detected by the wireless sensor unit exceeds the reference phase voltage. In paragraph 4,
An electrical safety alarm device characterized in that the first to third phase voltage indication lamps are each connected in parallel to the control circuit unit so that a light amount having a distinguishing characteristic is displayed when the phase voltage is detected by the wireless sensor unit. In the third paragraph,
An electrical safety alarm characterized in that a test button for checking the lighting status of the voltage display lamp is formed on one side of the alarm terminal, and the control circuit controls the lighting or flashing of the voltage display lamp while the test button is pressed. In paragraph 6,
An electrical safety alarm characterized in that the flashing control of the voltage display lamp by the above control circuit unit is performed alternately. In the third paragraph,
An electrical safety alarm characterized in that an alarm signal adjustment unit for adjusting the output level of an alarm signal through the speaker is formed on one side of the alarm terminal. delete In paragraph 1,
An electrical safety alarm device characterized in that the alarm terminal has a communication unit whose communication is controlled by the control circuit unit, and the communication unit transmits the three-phase induced voltage detected by the wireless sensor unit when it exceeds the reference voltage to a monitoring terminal at a set remote location.

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