KR20030055229A - A rheoscope with multi-function - Google Patents

Abstract

PURPOSE: A multi-functional detector is provided to prevent the electrocution by notifying whether or not an electricity flows on a cable through an LED(Light Emitting Diode) and a sound signal. CONSTITUTION: A detecting unit confirms whether or not a cable is an active state or not. A ground hanging unit discharges a voltage induced on the cable which is a non-active state to the earth through a ground terminal. A static switch selects one of the detecting unit, a ground hanging unit, and an off-unit. If the ground hanging unit switches the static switch, an LED repeats flickering, and if the detecting unit switches the static switch, the LED maintains a lighting state. If the detecting unit switches the static switch, a buzzer rings continually. An insulating high-pressure rod is provided along the cable in order to eliminate the detected or induced voltage.

Description

Multifunction Detector {A rheoscope with multi-function}

The present invention relates to a multifunction detector. In particular, the present invention relates to a detector having a grounding hook function.

Conventionally, when an electrician performs a track work in the field, he carries a detector as shown in FIG. 1 to check whether electricity of a track is alive. However, the existing detector has a large volume and is inconvenient because it can only determine whether electricity is live on the track.

Once the detector had confirmed that the track was dead, the portable grounding hook was again hooked up to the ground to remove any induced voltage that may have been induced on the track. The grounding hook used at this time was also heavy and inconvenient to carry.

As such, the electricians working on the train or subway site had to carry a detector and a grounding hook at the same time, and this required a lot of equipment, which cost a lot of money.

The present invention has been made to solve the problems of the prior art as described above, and an object of the present invention is to provide a multi-function detector with a grounding hook function.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention and the accompanying drawings.

1 is a circuit diagram of a multifunction detector according to the present invention.

1 is a circuit diagram of a multifunction detector according to the present invention. Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the drawings.

Conventionally, the charger of a conductor was formed in the upper end of a detector. However, in the present invention, instead of the charger, a charger of the type used in the conventional ground hook is formed. That is, in the multifunctional detector of the present invention, a conductor portion is formed at the end of a long (for example, 4 to 5 meters) insulated high voltage rod, and a circuit portion as shown in FIG.

The detector of the present invention has a transfer switch, which can be switched in four states: Off, F (Flash), L (Low), and H (High). When the detector is not used, switch off the switch and cut off the circuit power. When the detector of the present invention is used as a grounding hook, it is switched to F, to L to check the live state of the low voltage line, and to H to check the live state of the high voltage line.

1. When using as a detector

It is usually necessary to check whether the power is off before starting the track work. Therefore, if it is not turned off, the power switch is turned off, and even if it is off, the induced voltage may remain on the line. Therefore, the line must be grounded and the charged voltage of the line must be grounded and removed.

In order to check whether the track is alive, a detector has been used in the past. In the present invention, a separate grounding detector is used without a separate detector. In other words, if the switch of the detector is switched to H, the LED is turned on in the live state and a buzzer sound is generated through the speaker. H is usually used to check the live condition of wires over 44KV, and transfer switch is changed to L to check the live state of wires of 3 ~ 44KV. However, if the line is not live, the LED is off and no acoustic signal is generated.

First, the detector user of the present invention presses the test button to check whether the LED and the buzzer operate normally. The circuit of FIG. 1 uses two power sources. The B + 1 power supply is used as a detector (6 volts), and the B + 2 power supply is used as a ground hook (6 volts).

The switch of the present invention is switched to one of H and L according to the magnitude of the voltage in the off position, and then the high pressure rod is applied to the line where the work is to be made. In the circuit diagram, marked as High Voltage Input becomes the conductor part installed at the end of the high voltage rod. When the line is in a live state, voltage is induced through the high pressure bar, and a neon light is turned on. In general, neon light is turned on at 80 volts AC, so no matter how high the voltage is flowing through the high voltage rod, it is discharged through the neon light and grounded through the resistors at the L or H terminals, so it is applied between the emitter and base of the npn transistor Q1. The voltage becomes weak. However, it is enough to drive transistor Q1. The emitter output voltage of Q1 is amplified by transistor Q2 to drive the reed relay. A capacitor of a predetermined capacity is installed in parallel with the relay to absorb back electromotive force corresponding to the reactor component in the relay. The neon lamp is to protect the circuit from the high pressure flowing from the high pressure rod.

When a predetermined voltage is applied through L or H (ie, the line is live), transistors Q1 and Q2 are turned on to operate the reed relay so that the B + 1 power source drives the LED and speaker circuits. At this time, the transistor Q3 and the transformer (OPT) of the speaker input side constitute an oscillation circuit so that the speaker continuously generates a predetermined sound when live, and the diode D2 becomes a reverse bias to block the current flowing in the reverse direction.

If the voltage input through L or H does not belong to L and H and is on the boundary line of two voltage ranges, transistors Q1 and Q2 are turned off so that the reed relay Since it does not operate, power is not applied to the LED and the buzzer, which prevents these circuits from operating. This is for correct operation of the LED and buzzer.

Therefore, when the LED is turned on from the detector of the present invention and the buzzer rings through the built-in speaker, it indicates that the line is in a live state. On the other hand, if the LED is off and no acoustic signal is generated, the line is disconnected.

2. When using as a ground hook

When the detector of the present invention is to be used as a ground hook, the transfer switch may be switched to F. In other words, when working on high-voltage cables, the induced voltage that may remain on the line must be removed while the power of the line is cut off. Induced voltages may be induced from other nearby wires if they are live, so a means of removal must be provided prior to operation. The line must be grounded to remove the induced voltage.

Therefore, in order to use the detector of the present invention as a ground hook, the transfer switch must first be switched to F. The B + 2 power is then applied to the circuit. The oscillator NE555 is oscillated by the power supply, and the LED flashes by the current flowing through the collector because the pnp transistor Q4 is turned on by this signal. Diode D1 prevents this signal from going to the buzzer circuit. This informs third parties that the track is currently in operation with the track grounded.

In addition, when a high voltage rod in which the conductor part is grounded by a separate ground line is applied to the line, all induced voltages in the line are released to the ground along the ground line. Therefore, the LED blinks, which prevents a third party from accidentally powering on the line while the worker is working on the track.

In addition, if the induced voltage remains on the line due to any cause, since the line is connected to the charger of the present invention, the line becomes grounded and the induced voltage remaining on the line is completely removed. And when the line work is finished, remove the high pressure rod of the detector from the line and transfer the transfer switch to the off position. Then, the LED stops blinking and turns off so that the third party can safely turn on the line.

As such, the present invention may be variously modified and may take various forms, and only the specific embodiments thereof are described in the detailed description of the present invention. It is to be understood, however, that the present invention is not limited to the specific forms mentioned in the detailed description of the invention, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood to do.

The detector of the present invention is effective in preventing electrocution that may occur during work by checking whether the wire is live or not by the lighting state of the LED and whether the acoustic signal is generated through the speaker.

In particular, the detector of the present invention can prevent the electric shock accident that may occur during the operation of the line by discharging the residual current by grounding the live alarm function and the weak current using the ground wire.

In order to indicate that the high-pressure rod attached to the detector of the present invention is in operation in the ground state, the LED blinks to prevent a safety accident that may occur during operation.

Claims (6)

Inspection means for confirming whether or not the track is live; A ground hook means for discharging the voltage induced in the line identified in the inactive state by the inspection means to the ground through ground; A switching switch for selecting one of the inspection means, the ground hook means, and the off; LED repeatedly to continue flashing when the transfer switch is switched to the ground hook means, and maintains the lighting state when the transfer switch is switched to the test means; A buzzer which continuously sounds when the transfer switch is switched to a test means; And It is provided with an insulating high voltage rod of a predetermined length that extends over the line for removing the inspection or induced voltage, Multifunction detector, characterized in that the test means, ground hook means, transfer switch, the circuit portion of the LED buzzer is installed at the end of the high pressure rod. The multifunction detector according to claim 1, further comprising an oscillator for blinking the LED and amplifying an output signal of the oscillator to blink the LED. The multifunctional detector according to claim 2, further comprising test means for checking whether the LED and the buzzer operate normally when used as the detector. The switch of claim 3, wherein the transfer switch classifies the voltage of the line according to a predetermined criterion for efficient inspection, and accordingly, the voltage applied to the high voltage bar when switching to a transfer position corresponding to a predetermined voltage is applied to the voltage reference. And a means for applying power to the LED and the buzzer only when fitted. 5. The apparatus of claim 4, further comprising: charging means for charging the detector; And And an oscillation circuit for continuously generating a predetermined sound when live on the input side of the speaker. The method of claim 5, wherein in order to protect the circuit from the high voltage applied from the high voltage bar, it is necessary to drop the applied voltage through a conductor portion installed at the tip of the high voltage bar and a resistor of a predetermined size, and then install a neon lamp in parallel therewith. Characteristic, multifunctional detector.