KR200429263Y1 - The safe devices detecting a remaining electric charge and discharging automatically - Google Patents

Abstract

A ground rod buried in the ground for earth grounding; A ground wire (earth wire) wired to the ground rod; Five ground terminal blocks wired to the ground line for each panel of the closed switchgear (failure opening and closing base, metering base, vacuum breaking base, transformer panel, low voltage panel); A charge current ground terminal block which is connected to the ground contact on the opposite side to which the load side terminal of the fault section switch is opened and the switch is moved when the switch is moved by a ground contact wired to the ground wire to form a ground contact to ground the load current of the switch; Hall sensor unit for detecting the presence or absence of charge charge using a Hall element; A control line for transmitting the charge charges detected through the hall sensor to the controller; A control unit configured to include a microprocessor to amplify the charge charge detected through the control line and to drive the siren unit when the reference value is higher than a reference value (an administrator input value, the administrator inputs an initial reference value by a program and determines the logic logic through a comparison circuit in the microprocessor); Residual charge detection and automatic discharge safety device characterized by a siren that generates an alarm sound when charging charge is detected under the control of the controller

Hall effect, failure section automatic switchgear, switchgear, charging current, ground

Description

The safe devices detecting a remaining electric charge and discharging automatically}

1 is a simplified block diagram of the present invention

2 is a conventional warning nameplate

<Explanation of symbols for the main parts of the drawings>

10: ground rod

11: ground terminal block

12: Charge current ground terminal block

20: Automatic failure switch

30: Hall sensor unit

40: control unit

50: siren

60: Weighing Base

70: vacuum interruption base

80: transformer board

90 low pressure plate

Load switch (LBS) is a device with load switchgear and short circuit protection (when fuse is installed) in the nominal voltage 22.9KV distribution system. It is an indoor type and is used as a customer-side entry device, wire protection and high voltage branch switchgear.

Fault section automatic switchgear is a switchgear that is installed in a customer with a load capacity of 400KVA or less in a high-voltage distribution line and automatically divides the fault section in cooperation with other protection devices to prevent the expansion of the accident of the system due to the fault.

Circuit Breaker (CB) is an important protection device that has the responsibility to automatically and automatically cut off the power system in the event of power failure, transmission and change of power, and stop.

The circuit breaker is a vacuum that uses the SOHO medium as a vacuum depending on the type of SOHO medium (消 護 媒質) which is used to prevent and extinguish the fire caused by sparks. There are a circuit breaker, a gas circuit breaker using an inert gas such as SF6, and an inlet circuit breaker using insulating oil (insulating oil).

The breaker is energized or interrupted by high voltage electricity, and the operator should take special care.

As a safety device, there are a key lock, a button padlock, a trip button cover, and a push bar.

Key lock is a lock (safety device) that can be opened when the breaker is released by using a key when the breaker is inserted in order to prevent accidents caused by arbitrary operation of the breaker. .

The input trip button lock device (Button Padlock) is a locking device that protects the input trip button in order to prevent an accident that may occur due to an arbitrary operation of the breaker.

The input trip button cover and push bar are covers to protect the input trip button in order to prevent accidents caused by the arbitrary operation of the breaker. Can be operated.

In case of checking, repairing or measuring after opening switch or breaker, if there is residual charge (charge current), it is dangerous for human safety.

Especially in the lines of capacitive circuits and long-distance cables, there is a large residual charge, which is particularly dangerous and there are actual accident cases.

After the opening of the converter, the charging current (residual charge) automatically discharges to the ground at the same time as the opening of the fault section switch of the converter, and the residual charge is detected by the Hall sensor. It is the first technical task to generate.

In addition, when using test equipment such as a tester by placing a ground terminal block for each panel of the switchgear, the second technical task is to ground the device (test equipment) and install the ground terminal block for each panel for ease of use.

It is composed of ground rod, ground wire (earth wire), ground terminal block, charging current ground terminal block, hall sensor part, control wire, control part and siren part.

A ground rod buried in the ground for the earth ground and a ground wire (earth wire) wired to the ground rod are connected to the ground wire at each panel of the closed switchgear. It is composed of a ground terminal block.

Grounding terminal block is grounded when using tester and measuring device for each panel of switchgear to prevent electric shock due to charging current remaining in the equipment without being discharged (grounding).

In addition, the load-side terminal of the fault section switch is opened by wiring with the ground line, and when the switch is moved, the charging current ground contact is placed on the opposite side to which the switch is moved. The charging current ground terminal block which forms the contact which discharges is further comprised.

The hall element (hall sensor) for detecting the presence or absence of the charge charge is additionally configured in the fault section switch to detect the charge charge.

When a Hall element (Hall sensor) flows in a magnetic field, the charge carriers (charged particles) are accelerated to one end of the conductor under force. This phenomenon causes the charge current to be separated using the Hall effect. Charge charge).

When a solid such as a metal or a semiconductor is placed in a magnetic field and an electric current flows in the solid at a right angle to the direction of the magnetic field, an electric field appears in the solid at right angles to each of the two directions. This is called an electromotive force. When) moves in the magnetic field, the direction of movement is bent under the force of Lorentz.

Therefore, the electric current appears because the current flow in the solid is biased to one side and the distribution of charge is unbalanced.

Even if the currents are in the same direction, the direction of the generated electric field varies depending on the negative and positive charges (the electrons are negative).

In addition, the strength of the electric field varies depending on the concentration of the particles.

This effect can be used to measure the concentration or mobility of electrons (especially free electrons) that carry current in a solid.

Conventional Hall effect sensor is applied to the current in the solid at right angles to the direction of the magnetic field, the electric field appears in the solid at right angles to each of the two directions, but in the present design, the conductor (installed in the automatic switch section of the fault section) Hall sensor), and the fault section switch detects the charging current by transmitting the Hall electromotive force generated by the current perpendicular to the direction of the magnetic field when the live line or the charging current (residual charge) is generated.

The charging current (charge charge amount) detected through the hall sensor is transmitted through a control line that is transmitted to the control unit. The control unit is composed of a microprocessor and amplifies the charging current detected through the control line. If the program value is inputted and the logic logic is judged through the comparison circuit in the microprocessor, the siren part composed of the alarm that generates the alarm sound is driven to alert the user that there is a charge charge to prevent an electric shock accident.

In one embodiment, a ground rod buried in the ground for earth grounding; A ground wire (earth wire) wired to the ground rod; Five ground terminal blocks wired to the ground line for each panel of the closed switchgear (failure opening and closing base, metering base, vacuum breaking base, transformer panel, low voltage panel); A charge current ground terminal block which is connected to the ground contact on the opposite side to which the load side terminal of the fault section switch is opened and the switch is moved when the switch is moved by a ground contact wired to the ground wire to form a ground contact to ground the load current of the switch; Hall sensor unit for detecting the presence or absence of charge charge using a Hall element; A control line for transmitting the charge charges detected through the hall sensor to the controller; A control unit configured to include a microprocessor to amplify the charge charge detected through the control line and to drive the siren unit when the reference value is higher than a reference value (administrator input value, the administrator inputs the initial reference value by the program and determines the logic logic through the comparison circuit in the microprocessor); Residual charge detection and automatic discharge safety device characterized by a siren that generates an alarm sound when charging charge is detected under the control of the controller

As an example, a ground resistance meter may be additionally configured in the ground terminal block to ground the various measuring instruments (testers, etc.) prior to measurement, and use safety after checking the ground resistance when using the ground. Device

Conventionally, there has been a fault section switch of a current transformer (CT) type that detects a live state, but there is no method of detecting a fault section switch and a charging current (residual charge) thereafter.

The present invention detects the charging current through the Hall element (Hall sensor), automatically discharges the charging current at the same time, and puts a ground terminal block for each panel of the switchgear for convenient use of various measuring equipment. It has a triple effect.

Claims (2)

A ground rod buried in the ground for earth grounding; A ground wire (earth wire) wired to the ground rod; Five ground terminal blocks wired to the ground line for each panel of the closed switchgear (failure opening and closing base, metering base, vacuum breaking base, transformer panel, low voltage panel); A charge current ground terminal block which is connected to the ground contact on the opposite side to which the load side terminal of the fault section switch is opened and the switch is moved when the switch is moved by a ground contact wired to the ground wire to form a ground contact to ground the load current of the switch; Hall sensor unit for detecting the presence or absence of the charging current (charge charge) using the Hall element; A control line for transmitting the charge charges detected through the hall sensor to the controller; A control unit configured to include a microprocessor to amplify the charge charge detected through the control line and to drive the siren unit when the reference value is higher than a reference value (administrator input value, the administrator inputs the initial reference value by the program and determines the logic logic through the comparison circuit in the microprocessor); Residual charge detection and automatic discharge safety device characterized by a siren that generates an alarm sound when charging charge is detected under the control of the controller The method of claim 1, further comprising a grounding resistance measuring instrument in the ground terminal block, and grounding the various measuring instruments (testers, etc.) prior to measurement. Discharge safety device

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