JP5075147B2 - Alarm display method - Google Patents

Description

  The present invention relates to an alarm display method for displaying the danger range of an electric shock disaster in an easy-to-understand manner for electrical equipment.

In general, in the inspection work of electrical equipment such as a switchboard, the work is started after performing a voltage detection for confirming the life and death line before the work. In the life and death line confirmation work, an operator contacts the electric detector or the voltage alarm device with or close to the live line, and confirms whether it is in an energized state or a power failure state. However, if the operator forgets to detect electric power, thinks that it is a power failure, or if there is an unexpected change in the state of electrical equipment, there is a risk of causing an electric shock disaster.
As a conventional technique for preventing such forgetting to detect electric power, for example, a wrist-mounted charging detector has been proposed. This consists of a detector body containing a detection circuit and an alarm circuit and a detection electrode (detection antenna), and is configured to be worn on the wrist. When the high voltage charging unit approaches the high voltage charging unit, A detection circuit detects a small electrostatic induction current that flows from the high-voltage charging unit side to the human body due to the capacitance formed between the sensing electrode and the human body. An alarm is issued by an alarm circuit based on the detection signal (see, for example, Patent Document 1).

JP-A-8-220151

However, for electrical equipment with high-voltage charging parts that are at risk of electric shock disaster, the risk range of electric shock disaster is not known at all, and in what range and at what distance the voltage alarm actually operates, I didn't understand at all. The diagram showing the structure of the electrical equipment is generally plan view, difficult to understand, and time is required to understand the structure. Moreover, in electrical equipment, the distinction between the danger range of an electric shock disaster and the safe range was not understood. Furthermore, when inspecting the electrical equipment, the work instruction regarding the safety of the work instructor to the worker was inaccurate with respect to the danger range and safety range of the electric shock disaster.
The present invention has been made to solve the above-described problems, and has an electrical facility having a high-voltage charging unit that is at risk of an electric shock disaster, and a three-dimensional electric field strength distribution diagram is provided around the electrical facility. It is an object to provide an alarm display method that displays and displays easily the danger range of an electric shock disaster in accordance with the structure of the electrical equipment.

The alarm display method according to the present invention includes an electrical facility having a high-voltage charging unit that is at risk of an electric shock disaster, displays the structure of the electrical facility three-dimensionally, and distributes the electric field strength around the high-voltage charging unit. the provided a three-dimensional electric field distribution diagram of displaying stepwise color-coded according to the degree of risk of electric shock accidents, posting the three-dimensional electric field distribution diagram around part of the electrical equipment, to display the danger zone of electric shock accidents In the three-dimensional electric field intensity distribution diagram, a separation distance from a work area or a predetermined position to a danger range against an electric shock disaster is displayed .
In addition, the alarm display method according to the present invention includes an electrical facility having a high-voltage charging unit that has a risk of an electric shock disaster, displays the structure of the electrical facility three-dimensionally, and surrounds the high-voltage charging unit. Provide a three-dimensional electric field strength distribution diagram that displays the electric field strength distribution in stages according to the risk level of an electric shock disaster, and post the three-dimensional electric field strength distribution diagram around the electrical equipment to provide an electric shock hazard risk range. In the three-dimensional electric field strength distribution diagram, a separation distance from the high voltage charging unit to a dangerous range for an electric shock disaster is displayed.

According to the alarm display method of the present invention, it has an electrical facility having a high-voltage charging unit that is at risk of an electric shock disaster, three-dimensionally displays the structure of the electrical facility, and an electric field around the high-voltage charging unit. A three-dimensional electric field strength distribution map that displays the intensity distribution in stages according to the risk of electric shock disaster is provided.
Posting the three-dimensional electric field distribution diagram around part of the electrical equipment, to display the danger zone of electric shock accidents, in the three-dimensional electric field distribution diagram workspace, place, or the high voltage charge Since the separation distance from the section to the danger range for the electric shock disaster is displayed , the danger range of the electric shock disaster according to the structure of the electric equipment can be displayed easily.

It is a figure explaining preparation of the three-dimensional structure figure of the electric equipment in the alarm display method of Embodiment 1 of this invention. It is a figure which shows the three-dimensional electric field strength distribution map in the alarm display method of Embodiment 1. FIG. It is a figure which shows the aspect which posted the three-dimensional electric field strength distribution map in the alarm display method of Embodiment 1 in the surrounding part of an electrical installation. 6 is a block diagram of a voltage alarm device in the alarm display method of Embodiment 2. FIG. FIG. 10 is an external view of a voltage alarm main body of a voltage alarm in the alarm display method according to the second embodiment. It is an external view which shows the antenna part and voltage alarm device main-body part of the voltage alarm device in Embodiment 2. FIG. It is a figure which shows the usage example of the state which mounted | wore the wrist with the voltage alarm device of FIG.

Embodiment 1 FIG.
FIG. 1 is a diagram for explaining the creation of a three-dimensional structural diagram of electrical equipment in the alarm display method according to Embodiment 1 of the present invention. In the figure, a three-dimensional three-dimensional structure diagram 55 is created based on the front view 53 and the top view 54 of the electrical equipment 52 having the high-voltage charging unit 51 at risk of an electric shock disaster. Information from a plurality of plan views representing complicated electrical equipment to be worked is made into a three-dimensional structure diagram to make it easy to understand intuitively. Reference numeral 56 denotes a work area for an operator who constructs, inspects and repairs electrical equipment.

  FIG. 2 is a diagram showing a three-dimensional electric field intensity distribution diagram in the alarm display method of the first embodiment. In the electrical equipment 52 shown in the three-dimensional electric field strength distribution diagram of FIG. 2, the electric field strength distribution generated by the high voltage charging unit 51 is determined according to the risk level of the electric shock disaster. Incremental color-coded display. In a direction away from the side close to the high-voltage charging unit 51, a danger range A58 (the most dangerous range), a danger range B59 (a dangerous range corresponding to the most dangerous range), a danger range C60 (a dangerous danger to be aware of) The danger range A58 is displayed in red, the danger range B59 is yellow, and the danger range C60 is blue. The risk range A58, the risk range B59, and the risk range C60 for an electric shock disaster are collectively referred to as a risk range for an electric shock disaster.

Then, the separation distance from the outer periphery of the work area 56 to the outer periphery of each danger range is displayed. The distance from the work area 56 to the center of the high voltage charging unit 51 is X ₁ , the distance from the work area 56 to the danger range A 58 is X ₂ , the distance from the work area 56 to the danger range B 59 is X ₃ , and the work area 56 the distance from to danger range C60 is _{X 4.} The specific effective range of the safety measures at the time of work can be specified by these separation distances. That is, the safety range is from the work area 56 to the danger range C60 (distance X ₄ ). Moreover, you may make it display the separation distance from predetermined positions (for example, the outer door of an electrical installation) other than the working area 56 to the outer periphery of each danger range. Further, the distances from the center of the high voltage charging unit 51 to the outer periphery of the danger range A58, the danger range B59, and the danger range C60 may be displayed.

  FIG. 3 is a diagram showing a mode in which a three-dimensional electric field intensity distribution diagram 57 in the alarm display method of the first embodiment is posted around the electrical equipment. In this case, it is posted in the vicinity of the work area 56. In other words, the information is posted at a position that is easily noticeable by the operator to call attention. Reference numeral 61 denotes a protective net, which determines the arrangement of safety measures using the electric field intensity distribution of the three-dimensional electric field intensity distribution diagram 57.

  As described above, in the first embodiment, the electric equipment 52 having the high voltage charging unit 51 having a risk of an electric shock disaster is provided, the structure of the electric equipment 52 is displayed three-dimensionally, and the high voltage charging unit 51 is displayed. Is provided with a three-dimensional electric field strength distribution diagram 57 in which the electric field strength distribution is displayed in stages according to the degree of risk of electric shock disaster, and the three-dimensional electric field strength distribution diagram 57 is posted around the electrical equipment 52 to The risk range of disaster is displayed. Therefore, the electrical equipment is represented three-dimensionally in a three-dimensional manner, and the structure and contents of the equipment can be intuitively understood, and the operator of the electrical equipment can easily understand the complicated equipment structure. The operator can easily understand the range where there is a risk of electric shock by using the three-dimensional electric field intensity distribution map and the stepwise color-coded display corresponding to the risk of electric shock disaster.

  The work instructor can easily explain the structure of the electrical equipment, educate the danger to the electric shock disaster, etc. to the worker using the three-dimensional electric field strength distribution diagram. By displaying the three-dimensional electric field strength distribution map in the vicinity of the electrical equipment, particularly in the vicinity of the work area, at the time of inspection work, it is possible to increase the level of consciousness related to the prevention of electric shock accidents. By using the three-dimensional electric field strength distribution diagram, it is possible to distinguish and display the danger range for an electric shock disaster in an electrical facility and the safety range indicated by the separation distance from the work area to the danger range of the electric shock disaster. In other words, in order to understand the risk range for electric shock disasters and to avoid the risk of electric shock disasters in the 3D electric field strength distribution map, specific numerical values and information on the distance from the work area to the risk range for electric shock disasters can be visualized. Can get to.

Embodiment 2. FIG.
Workers of construction and inspection / repair of electrical equipment look at the posted 3D electric field strength distribution map, recognize the danger range of electric shock disasters in accordance with the structure of electrical equipment, and work on it. Carrying a voltage alarm. Next, a voltage alarm suitable for the alarm display method of the second embodiment will be described. FIG. 4 is a block diagram of a voltage alarm device in the alarm display method of the second embodiment. The voltage alarm device includes an antenna unit 10 and a voltage alarm device body unit 20. The voltage alarm main unit 20 includes a commercial frequency band amplifying unit 21, an operation sensitivity adjusting unit 22, a pulse noise removing unit 23, a flicker unit 24, and an alarm unit 25.

  The voltage alarm device according to the second embodiment is used by being worn on a human body. The antenna unit 10 is a portion that detects an electric field from the high-voltage charging unit 51 of the electrical equipment 52 that is a target of voltage detection, and includes a strip-shaped detection electrode 11 and a ground electrode 12 made of a conductive member having flexibility. , With a gap between them. Each electrode 11, 12 is connected to ring snaps 10 a, 10 b that are connected to the voltage alarm body 20. The antenna unit 10 is bent into a cylindrical shape as shown in the figure, and attached to, for example, a wrist. In this state, the outer side becomes the detection electrode 11 and the inner side becomes the ground electrode 12. The detection electrode 11 forms a space floating capacitance with the high voltage charging unit 51 to be detected, and the space potential is determined by the space floating capacitance and the capacitance between the ground electrode 12 and the human body. Divided and input.

  Next, the voltage alarm main body 20 will be described. The commercial frequency band amplifying unit 21 includes ring snaps 20a and 20b, a low-pass filter LPF, a voltage amplifier AMP, and a band-pass filter BPF. The ring snaps 20a and 20b are electrical and mechanical connections with the antenna unit 10, and can be detachably connected to the ring snaps 10a and 10b of the antenna unit 10. The low-pass filter LPF removes a frequency component higher than the commercial frequency from the induced voltage signal received by the antenna unit 10 and prevents the subsequent voltage amplifier AMP from performing a saturation operation.

  The voltage amplifier AMP amplifies the low-frequency signal that has passed through the low-pass filter LPF to a voltage level at which the operation sensitivity adjustment unit 22 in the next stage can operate. If the width of both electrodes of the antenna unit 10 is 5 cm and the distance between the electrodes is about 3 mm, an amplification factor of about 100 is appropriate. The band pass filter BPF passes only the vicinity of the commercial frequency and serves to remove noise that could not be removed by the low pass filter LPF. As a result, it is possible to prevent malfunction due to noise generated by the electronic device or the like. When used in Japan, the center frequency should be set to 55 hertz. The order of each filter is suitably 2 to 6.

  The operation sensitivity adjustment unit 22 includes a voltage comparator CMP1 and a voltage comparator CMP2, a first reference voltage setting unit REF1, and a second reference voltage setting unit REF2. The voltage comparator CMP1 compares the first reference voltage value set by the first reference voltage setter REF1 with the magnitude of the output voltage from the previous bandpass filter BPF. High) is output. Similarly, the voltage comparator CMP2 compares the second reference voltage value set by the second reference voltage setter REF2 with the magnitude of the output voltage from the preceding bandpass filter BPF. H is output. The set values of both reference voltage setters REF1 and REF2 are set such that the voltage comparator CMP1 is set to a logical value as it approaches the high voltage charging unit 51 by setting the value of the second reference voltage setter REF2 to a larger value. H is output, and the voltage comparator CMP2 also outputs a logical value H as it approaches. For example, the voltage comparator CMP1 outputs a logic value H in the danger range C60 of FIG. 2, and the voltage comparator CMP2 also outputs a logic value H in the danger range B59.

  The pulse noise removing unit 23 includes on-delay circuits DL1 and DL2 having an on-delay timer and a test switch S. If the antenna unit 10 receives several thousand volts of static electricity caused by clothing friction or the like, a pulsed high voltage is input to the commercial frequency band amplifying unit 21, and the signal due to static electricity is not removed and the operation sensitivity adjusting unit 22. Will be entered. In this case, both of the voltage comparators CMP1 and CMP2 output a logic value H as a pulse.

  Therefore, the on-delay circuits DL1 and DL2 output the logic value H when the input logic value H continues for a certain time (set value T), and immediately after the input logic value becomes L (low), the output logic value L It is trying to become. That is, the set value T of the on-delay circuits DL1 and DL2 is set to a value larger than the pulse width of the logical value H output from the voltage comparators CMP1 and CMP2 due to static electricity to eliminate the pulse output due to static electricity. Note that if the set value T is too large, the detection speed becomes slow, so it is appropriate to set it to about 30 to 60 milliseconds. The test switch S is a self-test switch, and when the test switch S is pressed, the input logical values of the on-delay circuits DL1 and DL2 are forcibly set to H, and each subsequent electronic circuit operates normally. It can be confirmed.

  The next flicker unit 24 includes an oscillator OSC1, an oscillator OSC2, and a selector SEL. When the input logical value is H, the oscillator OSC1 repeats the operation of outputting a square wave voltage of several hundred hertz for several hundred milliseconds and resting for several hundred milliseconds, for example. The oscillator OSC2 performs the same operation, but the operating frequency and the intermittent time are set to values different from those of the oscillator OSC1, for example, a higher operating frequency and a short period of intermittent time than the oscillator OSC1. The selector SEL passes the output of the oscillator OSC2 when the logic output of the comparator CMP2 is H, and otherwise passes the output of the oscillator OSC1.

  The last alarm unit 25 includes an LED display 26 and a buzzer 27. The LED indicator 26 blinks in accordance with each intermittent time based on the output signal of the oscillator OSC1 or the oscillator OSC2. Similarly, the buzzer 27 generates an intermittent sound in accordance with the operating frequency and the intermittent time based on the output signal. By using blinking and intermittent operation, the operation of the alarm unit 25 is distinguished in two stages to make it easier for the operator to notice. Each electronic circuit described above is driven by a button battery 28 built in the voltage alarm main body 20.

  The operation of the voltage alarm device configured as described above will be described. When the antenna unit 10 mounted on the human body of the worker approaches the high voltage charging unit 51 to be a voltage detection target, the detection electrode 11 of the antenna unit 10 is an electric field created by the high voltage charging unit 51 having a commercial frequency. Is charged by. In a state in which the detection electrode 11 is separated from the downstream low-pass filter LPF, if the average electric field strength on the surface of the detection electrode 11 is E, the potential difference V between the detection electrode 11 and the ground electrode 12 is E. A value obtained by multiplying the distance d between them (V = E · d). A stable output can be obtained by keeping the distance d constant.

  Further, by making the detection electrode 11 and the ground electrode 12 have a double cylindrical structure, directivity can be eliminated from the property that the lines of electric force gather perpendicularly to these surfaces. That is, the same sensitivity can be obtained regardless of the direction from which the high voltage charging unit 51 is approached. As described above, the antenna unit 10 has a double cylindrical structure, and is disposed to face each other over a wide area with a predetermined interval, thereby realizing high sensitivity by increasing the antenna gain.

  The voltage detected by the antenna unit 10 is input to the voltage alarm main unit 20, the commercial frequency band amplifying unit 21 amplifies only the vicinity of the commercial frequency, the operating sensitivity adjusting unit 22 adjusts and sets the operating sensitivity, and the high voltage charging unit When an alarm signal is approaching within a predetermined alarm operating distance (within a danger range against an electric shock disaster), an operation signal is output, and noise caused by a high-voltage pulse such as static electricity is removed by the pulse circuit removal unit 23, and the flicker unit 24. In the alarm unit 25, the LED display 26 is blinked by the alarm signal in the alarm unit 25 and an intermittent sound is generated by the buzzer 27 to notify the worker of the approach to the charging unit. In addition, a plurality of sensitivities are set by comparing with a plurality of reference voltage values in the operation sensitivity adjustment unit 22, and the flashing light of the alarm unit 25 is determined by the distance from the high voltage charging unit 51 (danger ranges C60, B59, A58). The degree of danger can be notified step by step by changing the blinking interval and the intermittent interval of the intermittent sound.

  Next, a specific structure of the voltage alarm will be described with reference to FIGS. First, the voltage alarm main body 20 will be described. FIGS. 5A and 5B are external views of the voltage alarm device main body 20, wherein FIG. 5A is a plan view, FIG. 5B is a front view, and FIG. 5C is a bottom view. As shown in (a), the voltage alarm main unit 20 includes the commercial frequency band amplifying unit 21, the operation sensitivity adjusting unit 22, the pulse noise removing unit 23, the flicker unit 24, the alarm unit 25, and the button battery described above. 28 is accommodated in a resin container 29. On the upper surface, voltage setting device adjustment volumes 30a and 30b corresponding to the reference voltage setting devices REF1 and REF2, respectively, a push button 31 and an LED corresponding to the test switch S are provided. A display 26 and a buzzer 27 are arranged.

  Further, as shown in (c), ring snaps 20 a and 20 b and a battery storage lid 32 for the button battery 28 are arranged on the lower surface of the voltage alarm main body 20. The ring snaps 20a and 20b are combined with the ring snaps 10a and 10b provided in the antenna unit 10, and are electrically connected to the detection electrode 11 and the ground electrode 12 of the antenna unit 10 and are also mechanically fixed to the antenna unit 10. Is done. In addition, since the ring snap has a concave portion and a convex portion fitted and combined, one side is convex as shown in (b) so that the detection electrode 11 side and the ground electrode 12 side are not mistaken at the time of connection. The part side and the other are the concave part side.

  FIG. 6A is an external view of a voltage alarm device showing a state in which the antenna unit 10 and the voltage alarm device main body unit 20 are combined. In the example of FIG. 6, the antenna unit 10 is wound around, for example, a wrist. The case where the wristband type is used is shown. The antenna unit 10 has a sandwich structure in which an insulating spacer of about 3 mm is sandwiched between the detection electrode 11 made of conductive cloth and the ground electrode 12 made of conductive cloth in order to provide a predetermined interval. Is provided with a pocket 16 for storing and holding the voltage alarm main body 20. A hook-and-loop fastener 17 is provided on the end side in the length direction. FIG. 6B is a diagram illustrating the antenna unit 10 with the voltage alarm main body 20 removed, and the antenna unit 10 side for connecting to the ring snaps 20a and 20b on the voltage alarm main unit 20 side. Ring snaps 10 a and 10 b are provided inside the pocket 16.

  FIG. 7 is a diagram showing a usage example in a state where the voltage alarm device of FIG. 6 is worn on the wrist. It can be mounted by winding the wrist fastener 17 around the wrist. In the mounted state, the antenna unit 10 has a cylindrical shape, and the outer detection electrode 11 and the inner ground electrode 12 are arranged to face each other via an insulating spacer.

  The usage method of the voltage alarm device comprised as mentioned above is demonstrated. As shown in FIG. 7, an operator wraps a voltage alarm device around the wrist and wears the alarm unit so that the alarm unit can be seen. The voltage setting device adjustment volumes 30a and 30b are set in advance as described later in accordance with the environment of the electrical equipment to be operated. If necessary, the operator can easily check the operation of the voltage alarm device in advance by operating the test switch S by pressing the push button 31 before the operation.

  When an operator approaches the high-voltage charging unit 51 of the electrical equipment 52 within a predetermined distance, first, the oscillator OSC1 of the flicker unit is activated, the LED display 26 blinks, and the buzzer 27 emits intermittent sound. Thus, the worker can know the danger. Further, when the worker approaches the high voltage charging unit 51, the oscillator OSC2 operates. However, since the blinking and intermittent cycle are changed from those of the OSC1, the worker can know that the degree of danger has increased. it can. The buzzer 27 may change the volume (or pitch).

  In the above description, the case where the antenna unit 10 is used as a wristband type has been described. However, by changing the length of the antenna unit, an armband type may be attached to the arm, or a headband type. It may be used by wrapping around the head.

  As described above, according to the voltage alarm device in the second embodiment, the antenna unit having the detection electrode and the ground electrode and used on the operator's human body, and the high voltage charging unit of the electrical equipment are used. A voltage alarm body having a voltage alarm body for detecting an induced voltage signal generated between both electrodes by an electric field and issuing an alarm for alerting an operator based on the detected induced voltage signal The operational sensitivity adjustment unit that adjusts the sensitivity to detect the induced voltage signal, the band-pass filter that passes the frequency component near the commercial frequency from the induced voltage signal detected by the antenna unit, and the on-delay that removes the high voltage pulse Since it is equipped with a circuit, it can cut off frequency signals other than those near the commercial frequency and eliminate noise such as static electricity, so it can realize high amplifier gain and alarm when it is not necessary By suppressing work, it is possible to realize a high sensitivity of the voltage alarm.

  In addition, the detection electrode and the ground electrode of the antenna portion are made of a conductive belt-like cloth, are arranged to face each other via a flexible insulating spacer, and are configured to be bent into a cylindrical shape so as to be attached to the human body. ing. Further, since the voltage alarm main body is accommodated in a pocket provided on the surface of the antenna portion, it is possible to prevent the voltage alarm main body from falling off due to being caught by a projection or the like during work. Further, since the antenna portion is formed in a band shape that can be wound around a part of the human body of the operator, it can be easily attached to the wrist, arm, head, etc. during use. Furthermore, the alarm is configured with flashing light and intermittent sound, and the flashing cycle and intermittent cycle change according to the distance between the high voltage charging unit and the antenna unit, so the degree of danger due to the approach to the high voltage charging unit is stepped The operator can be informed.

  In the second embodiment, the voltage setting device adjustment volumes 30a and 30b are adjusted. The voltage setting device adjustment volume 30a is adjusted to a high sensitivity so that the voltage comparator CMP1 of the operation sensitivity adjustment unit 22 operates (logic level becomes H) in the danger range C60 against an electric shock disaster. For example, the sensitivity setting is set so that the electric field strength operates at 40 V / m. The voltage setting device adjustment volume 30b adjusts to a low sensitivity so that the voltage comparator CMP2 of the operation sensitivity adjustment unit 22 operates (logic level becomes H) in the danger range B59 against an electric shock disaster. For example, the sensitivity setting is set so that the electric field strength operates at 60 V / m. In this way, the danger range for the electric shock disaster shown in the three-dimensional electric field strength distribution diagram 57 and the operation sensitivity of the voltage alarm are matched. In other words, the setting sensitivity of the voltage alarm is adjusted in association with the stepwise color-coded display according to the risk of electric shock disaster. Further, the alarm operation range of the voltage alarm device may be displayed in the three-dimensional electric field strength distribution diagram in association with the stepwise color-coded display according to the risk of electric shock disaster.

  In this way, if the voltage alarm setting sensitivity is adjusted in relation to the stepwise color-coded display according to the risk of electric shock disaster in the three-dimensional electric field strength distribution map, the danger range where the alarm of the voltage alarm operates is Can inform the workers. In addition, if the separation distance from the work area or a predetermined position to the danger area for an electric shock disaster is clearly indicated on the 3D electric field strength distribution map, the safety distance and the safety range can be grasped, and the safety distance may be exceeded by mistake. If this happens, an alarm is activated and it is easy to return to the safe range side.

DESCRIPTION OF SYMBOLS 10 Antenna part 10a, 10b Ring snap 11 Detection electrode 12 Ground electrode 16 Pocket 17 Surface fastener 20 Voltage alarm main part 20a, 20b Ring snap 21 Commercial frequency band amplification part 22 Operation sensitivity adjustment part 23 Pulse noise removal part 24 Flicker part 25 Alarm unit 26 LED indicator 27 Buzzer 28 Button battery 29 Container

30a, 30b Voltage setting device adjustment volume 31 Push button 32 Battery storage lid 33 Glove body LPF Low pass filter AMP Voltage amplifier BPF Band pass filter CMP1, CMP2 Voltage comparator REF1 First reference voltage setting device REF2 Second reference voltage setting device DL1, DL2 On-delay circuit S Test switch OSC1, OSC2 Oscillator SEL selector.

51 High Voltage Charging Unit 52 Electrical Equipment 53 Front View 54 Top View 55 3D Structure Diagram 56 Work Area 57 3D Electric Field Strength Distribution Diagram 58 Hazardous Area A
59 Danger range B 60 Danger range C
61 Protective net

Claims (5)

It has electrical equipment with high voltage charging parts that are at risk of electric shock,
The structure of the electrical equipment is three-dimensionally displayed, and a three-dimensional electric field strength distribution diagram is provided in which the electric field strength distribution is displayed stepwise by color depending on the degree of risk of an electric shock disaster around the high-voltage charging part,
Posting the three-dimensional electric field strength distribution map around the electrical equipment,
Display the danger range of electric shock disaster ,
An alarm display method for displaying a separation distance from a work area or a predetermined position to a danger range against an electric shock disaster on the three-dimensional electric field intensity distribution diagram . It has electrical equipment with high voltage charging parts that are at risk of electric shock,
The structure of the electrical equipment is three-dimensionally displayed, and a three-dimensional electric field strength distribution diagram is provided in which the electric field strength distribution is displayed stepwise by color depending on the degree of risk of an electric shock disaster around the high-voltage charging part,
Posting the three-dimensional electric field strength distribution map around the electrical equipment,
Display the danger range of electric shock disaster,
An alarm display method in which the three-dimensional electric field strength distribution map displays a separation distance from the high-voltage charging unit to a danger range against an electric shock disaster. The alarm display method according to claim 1 or 2 , wherein the setting sensitivity of the voltage alarm device is adjusted in association with the stepwise color-coded display according to the degree of risk of electric shock disaster. The alarm display according to claim 1 or 2, wherein the three-dimensional electric field intensity distribution diagram displays an alarm operation range of the voltage alarm device in association with a step-by-step color-coded display according to the risk of an electric shock disaster. Method. The voltage alarm device has a detection electrode and a ground electrode, and is used by being attached to an operator's human body, and the high voltage charging unit and the detection electrode by approaching a high voltage charging unit of an electrical facility. The induced voltage signal generated between the two electrodes is detected by the space floating capacitance generated between the two and the ground capacitance generated between the human body and the ground electrode, and the detected induced voltage is detected. A voltage alarm device main body that issues an alarm for alerting an operator based on a signal, and the voltage alarm device main body includes an operation sensitivity adjustment unit that adjusts sensitivity for detecting the induced voltage signal, and a bandpass filter for passing a frequency component of the commercial frequency near from the induced voltage signal detected by the antenna unit, according to claim 3 or claim is obtained by including an on-delay circuit for removing a high-voltage pulse 4 alarm display method according.

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