KR200284070Y1 - Device for earthing status display - Google Patents

Abstract

A grounding state display device will be described. The grounding state display device of the present invention comprises a dangerous voltage detection sensitivity control unit connected to an enclosure connection terminal connected to an enclosure of an electric device and detecting an entrance of an enclosure electric potential larger than a set voltage, Voltage detection sensitivity control unit connected to the terminal for detecting an input of an external voltage smaller than a set voltage and a voltage detection sensitivity controller connected to the voltage detection and sensitivity control unit and connected to a voltage line and a neutral line, And a rating display unit connected to the rated voltage detection sensitivity adjuster and connected to the voltage line and the neutral line and configured to drive the LED according to amplifying the voltage detected by the rated voltage detection sensitivity adjuster, And a polarity discriminating unit connected to the voltage line and the neutral line for checking the polarity of the power source for operation of the circuit, Is connected to the voltage line is characterized in that made in comprising a three-phase power three-phase power supply equipped with a terminal for connecting the power supply line of the electrical devices that use.

According to the present invention, it is possible to easily read out the normal connection state of the protective ground that should be provided for the prevention of electric shock and the right connection of the outlet wiring, and can be used as a safety device for preventing electric shock and electric fire. Which is an advantage of improving the safety consciousness of electric power.

Description

[0001] The present invention relates to a device for earthing status display,

The present invention relates to a grounding state display device, and in particular, to a grounding state display device configured to visually display a proper state of grounding of an electric machine or an electric appliance in advance to prevent an electric shock accident in an industrial field or an everyday living environment .

In general, the inspection of power distribution equipment that supplies power to electric machines and electric equipment is carried out by a professional engineer, but the supplementary results are insufficient due to insufficient recognition of the importance of grounding.

In addition, after completion of building completion and installation of production equipment, it is used without checking whether the installation condition of power supply equipment and protective grounding is proper or not. Therefore, after a considerable period of time, It is true that it is difficult to judge.

If some expert technicians are secured, they will continue to be checked and supplemented. However, if there are no specialists, they depend on the inspection of specialists of external agencies. Moreover, it is not enough to secure its own manpower and technology, but also to be able to operate equipment.

Therefore, the purpose of the present invention is to detect the voltage according to the potential generated at the system ground of the electric machine, the electric ground, and the protective earth to prevent the electric shock accident in advance, so that the danger voltage and the rated voltage, And a ground state display device configured to visually display the connection state of the protective ground wire and the normal connection state of the voltage line and the neutral wire in the outlet / plug connection portion.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the basic principle of a grounding state display apparatus according to an embodiment of the present invention; Fig.

2 is a circuit diagram of a grounding state display device according to an embodiment of the present invention;

Description of the Related Art [0002]

1: Sensitivity adjustment for dangerous voltage generation part 2: Rated voltage detection sensitivity adjustment part

3: status display section 4: polarity discrimination section

5: Three phase power supply terminal C ₁ , C ₂ : Capacitor

R ₁ , R ₂ , R ₅ , R ₆ : variable resistor

_{R 3, R 4, R 7} , R 8, R 9, R 10, R 11, R 12, R 13, R 14: a fixed resistance

_{D 1, D 2, D 5} , D 6, D 7, D 8, D 9, D 10: diode

Q ₁ , Q ₂ , Q ₃ : transistor LED ₁ , LED ₂ : light emitting diode

LP ₁ , LP ₂ : Neon lamp TP _C : Enclosure full-speed terminal

TP _P : Power supply polarity reading terminal TP _H : Voltage line power supply terminal

TP _N : Neutral wire power terminal

TP _R , TP _S , TP _T : Three-phase power supply terminal

The grounding state display device for achieving the object of the present invention includes a dangerous voltage detection sensitivity control unit connected to an enclosure connection terminal connected to an enclosure of an electric device and detecting an entrance of an enclosure electric potential larger than a set voltage, A rated voltage detection sensitivity controller connected to an enclosure connection terminal connected to an enclosure of the device and detecting an input of an enclosure electric potential smaller than a set voltage, and a control unit connected to the danger voltage detection sensitivity adjuster and connected to a voltage line and a neutral line, The voltage detecting sensitivity adjusting unit drives the light emitting device according to the voltage detected by the voltage detecting sensitivity adjusting unit and is connected to the hazard display unit and the rated voltage detecting sensitivity adjusting unit and is connected to the voltage line and the neutral line to amplify the voltage detected by the rated voltage detecting sensitivity adjusting unit A state display unit including a rated display unit for driving the light emitting element, and a display unit connected to the voltage line and the neutral line, And a three-phase power supply unit having a polarity discriminating unit for checking the polarity of the power supply and a terminal connected to the voltage line for connecting the power supply line of the electric equipment using the three-phase power supply.

In addition, the danger voltage detection sensitivity adjustment unit the one end is connected to the housing the connection terminals (TP _C) connected to the electronic device housing the first capacitor (C ₁₎ and said first capacitor (C ₁₎ is connected to one end to the other end and the other side with a first variable resistance (R ₁₎ connected to extend the neutral line, the first variable resistance (R ₁₎ a first diode (D ₁₎ and the first diode (D ₁₎ node side is connected to the And a third fixed resistor (R ₃ ) connected to the cathode side of the second resistor.

Further, as the second capacitor (C ₂₎ one end is connected to the housing the connection terminals (TP _C) connected to the enclosure of the rated voltage detection sensitivity adjustment unit electronic device, the second capacitor (C ₂₎ is connected to one end to the other end and the other side is a second variable resistor (R ₂₎ and the second node side connected to the variable resistor (R ₂₎ a second diode (D ₂₎ connected to extend the neutral line, the second diode (D ₂ A fourth fixed resistor R ₄ connected to the cathode side of the fourth fixed resistor R ₄ and a fourteenth fixed resistor R ₁₄ having one end connected to the fourth fixed resistor R ₄ and the other end connected to the contact line. .

Also. The state display portion and a first transistor (Q ₁₎ connected to the third and the base is connected to a fixed resistor (R ₃₎ emitter neutral line of the control unit (1) the danger voltage detection sensitivity, the first transistor (Q ₁ ) of claim 1LED (LED ₁₎ side is connected to the collector of a, a fifth diode (D ₅₎ and the fifth diode (D ₅₎ connected to the cathode side to the other side of the first 1LED (LED ₁₎ of A seventh fixed resistor R ₇ having one side connected to the node side and the other side connected to the voltage line and a fifth variable resistor R ₇ having one side connected to the cathode side of the fifth diode D ₅ and the other side connected to the neutral line R ₅ ).

The status display unit may further include a second transistor Q ₂ having a base connected between a fourth fixed resistor R ₄ and a fourteenth fixed resistor R ₁₄ of the rated voltage detection sensitivity adjuster 2, a second transistor (Q _2), a third transistor (Q ₃₎ and said second transistor (Q ₂₎ and the third transistor (Q ₃₎ of the call connected to the Darlington connection is the emitter voltage line to amplify the current and the one side is connected to a varactor of claim 2LED (LED _2), wherein the 2LED (LED ₂₎ and the cathode side is connected to the other side a sixth diode (D ₆₎ of the sixth diode (D ₆₎ to the node side on one side is connected and the other end being connected to one side to the cathode side of the eighth fixed resistor (R ₈₎ and the sixth diode (D ₆₎ connected to the voltage line the other end of the sixth variable resistor connected to the voltage line (R ₆₎ .

The polarity determination unit may include a tenth fixed resistor R ₁₀ having one end connected to the voltage line power supply terminal TP _H and a seventh diode D connected to the other end of the tenth fixed resistor R _{10 7)} and the seventh diode (the normal wiring lamp connected to the cathode of D ₇₎ (LP ₁₎ and, with the power supply polarity read terminal (TP _P) for connection extending in the normal wiring lamp (LP _1), the neutral conductor the power source terminal (TP _N) one end is connected with the ninth fixed resistor (R _9), and the node is connected to the ninth fixed resistor (R ₉₎ the other end an eighth diode in (D ₈₎ and said eighth diode ( D ₈ ), and the other end thereof is made of an abnormal connection lamp (LP ₂ ) connected to the power supply polarity reading terminal (TP _P ).

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a view showing a basic principle of a grounding state display apparatus according to an embodiment of the present invention. 1, R ₁₀₀ is connected to a ground line N, a capacitor C ₁₀₀ is connected to the resistor R ₁₀₀ , and a capacitor C ₂₀₀ and a resistor R _{200 are} connected in this order. After the end of the resistor R ₂₀₀ is connected to the voltage line H and the ground terminal TP _C1 is connected between the capacitor C ₁₀₀ and the capacitor C ₂₀₀ , When the ground terminal TP _C1 is connected to the enclosure, the resistor R ₁₀₀ and the capacitor C ₁₀₀ , the capacitor C ₂₀₀ and the resistor R ₂₀₀ are focused on the power supply side voltage line H to the ground line N It can be understood as a principle of being.

2 is a circuit diagram of a grounded state display apparatus according to an embodiment of the present invention. Referring to FIG. 2, the voltages V ₁ and V ₂ formed at both ends of the first variable resistor R ₁ and the second variable resistor R ₂ are sensed using the principle of FIG. ₁ . At this time, according to the use of the first variable resistor R ₁ and the second variable resistor R ₂ , V ₁ and V ₂ are set to be variable according to the power supply voltage condition or the voltage condition to be sensed.

This value is detected when the value of the enclosure electric potential is equal to or higher than the safety voltage (set at 30 V but set by the operation of the first variable resistor R ₁ or the second variable resistor R ₂ according to the test environment of the present invention) A rated voltage detection sensitivity adjusting section (2) for detecting the value when the value of the outer casing potential becomes lower than the safe voltage, a status display section 3), a polarity discrimination unit 4 for checking the polarity of the power source for the operation of the circuit, and a three-phase power supply unit 5 for connecting to the power line of the equipment using the three-phase power source.

The danger voltage detection sensitivity adjusting unit 1 is connected to one end of a first variable resistor R ₁ at the other end of a first capacitor C ₁ whose one end is connected to an external connection terminal TP _C , The other end of the resistor R ₁ is connected to the neutral line and a third fixed resistor R (R ₁ ) having one end connected to the cathode of the other end of the first diode D ₁ connected to the first variable resistor R _{1 3} ).

The rated voltage detection sensitivity adjusting section 2 is connected to one end of a second variable resistor R ₂ at the other end of a second capacitor C ₂ having one end connected to an external connection terminal TP _C , The other end of the resistor R2 is connected to the voltage line and the fourth fixed resistor R ₄ connected to the cathode at the other end of the second diode D ₂ to which the node is connected is connected to the second variable resistor R ₂ A fourth fixing resistor R ₁₄ is connected to one end of the fourth fixing resistor R ₄ and the other end of the fourteenth fixing resistor R ₁₄ is connected to a voltage line.

The state display unit 3 connects the base portion of the first transistor Q ₁ to the third fixed resistor R ₃ of the hazard detection voltage sensitivity adjusting unit 1 and connects the emitter portion to the neutral line, in my 1LED (LED ₁₎ is connected and said first 1LED (LED ₁₎ of the other end of the fifth diode (D ₅₎ being connected to the cathode, then a node is the seventh fixed resistance of the fifth diode (D ₅₎ (R ₇ ) are connected. The first LED (LED ₁ ) is provided with a red LED in order to increase recognition of the ground fault.

A fifth fixed resistor R ₅ is connected to the cathode of the fifth diode D ₅ , and the other end thereof is connected to a neutral line to form a hazard display portion.

On the other hand, the base portion of the second transistor Q ₂ connected between the fourth fixed resistor R ₄ and the fourteenth fixed resistor R ₁₄ of the rated voltage detection sensitivity adjuster ₂ is extended and connected, third transistor by a Darlington connection for connecting to the base of (Q _3), and thereby doubling the amplitude of the current from a low voltage signal, connected to the emitter voltage line of the third transistor (Q _3), said second transistor ( Q ₂₎ and the third and the transistor (Q ₃₎ kolraek taboo has claim 2LED (LED ₂₎ is is connected to the other end of the first 2LED (LED ₂₎ is connected to the cathode of a sixth diode (D _6), the sixth The eighth fixed resistor R ₈ is connected to the node E of the diode D ₆ and the other end of the eighth fixed resistor R ₈ is connected to the neutral line and is also connected to the neutral line power terminal. The second LED (LED ₂ ) is provided with a green LED to recognize that a rated voltage is detected.

Further, the sixth diode (D ₆₎ of the cathode, the sixth variable resistor (R ₆₎ is connected and the other end thereof is connected to the extension soon as connected to the source line voltage line at the same time the power source terminal (TP _H).

The polarity discrimination unit 4 is provided with a tenth fixed resistor R ₁₀ whose one end is connected to the voltage line power supply terminal TP _H and whose node is connected to the other end of the tenth fixed resistor R ₁₀ the other end of the seventh diode (D ₇₎ in other words, the cathode is connected to the top connection lamp (LP ₁₎ at the same time soon as the normal wiring lamp (LP ₁₎ connected to a power source polarity read terminal (TP _P) for.

On the other hand, one end to the neutral power source terminal (TP _N) is a cost having a ninth fixed resistor (R ₉₎ connected being, nodes are connected to the other end of the ninth fixed resistor (R ₉₎ an eighth diode (D ₈ the other end of), i.e., the cathode is connected to a wiring abnormality lamp (LP ₂₎ at the same time soon as abnormal wiring lamp (LP ₂₎ is connected to the power polarity read terminal (TP _P) for.

The three-phase power supply (5) is the cost and the one end of the eleventh fixed resistor (R ₁₁₎ connected to said power supply line, the cathode is connected to the other end of the eleventh fixed resistor (R ₁₁₎ 9 diode (D ₉₎ And a first terminal TP _R is provided at the node A of the first node TP _R.

In this way, one end of the twelfth fixed resistor R ₁₂ is connected to the power supply line, and the node of the tenth diode D ₁₀ , to which the cathode is connected to the other end of the twelfth fixed resistor R ₁₂ , A terminal TP _S is provided.

Further, a thirteenth fixed and one end of a resistor (R ₁₃₎ connected, the thirteenth fixed resistor (R ₁₃₎ nodes, the third terminal to the 11th diode (D ₁₁₎ cathode is connected to the other end of the power line (TP _T ) is provided to form a three-phase power supply terminal and to connect the power line of a device using a three-phase power supply.

In order to initialize the ground state display device having the above-described circuit diagram, the first variable resistor R ₁ and the second variable resistor R ₂ are first positioned at the middle point and the enclosure connection terminal TP _C is set to the neutral line When the fifth variable resistor R ₅ is short-circuited to the power supply terminal TP _N , the position immediately before the _first LED (LED ₁ ) is turned on can be obtained. At this time, to lay in the off state immediately before the ignition, and the sixth adjusting the variable resistor (R ₆₎ to separate the housing ground terminal (TP _C) the voltage line power source terminal (TP _H) immediately before lights claim 2LED (LED ₂₎ Location can be obtained. At this time, it is set to the unlit state immediately before it is turned on.

The voltage between the neutral line power supply terminal TP _N of the external ground terminal TP _C and the first variable resistor R ₁ and the second variable resistor R ₂ are set so that the current flowing to the LED at 15 V is 0.1 mA by using a variable voltage, Adjust the resistance (R ₂ ).

When the first LED (LED ₁ ) is turned on in the configuration according to the circuit diagram of the grounding state display device, the state of the grounding is poor or the potential is formed in the enclosure due to various other causes. If there is no abnormality after measurement, grounding should be done.

If it is already grounded, check the grounding for abnormality.

On the other hand, if the second LED (LED ₂ ) is turned on, the enclosure can be interpreted as meaning relatively safe against electric shock.

On the other hand, in the polarity discrimination unit, after the enclosure ground terminal TP _{C is} connected to the electric machine and the enclosure of the mechanism, the voltage line power terminal TP _H is connected to the voltage line and the neutral line power terminal TP _N is connected to the neutral line If the neutral wire can not be distinguished, it means that after the power is turned on, the power supply polarity reading terminal TP _P is brought into contact with the hand and the normal wiring lamp LP ₁ is turned on, If the abnormal connection lamp (LP ₂ ) is turned on, it is connected abnormally, and the connection is established. If the normal connection lamp (LP ₁ ) and the abnormal connection lamp (LP ₂ ) are both turned on, the electric appliance using 110V is used . Since the apparatus in this embodiment has been shown based on the use of 220V, it can be judged that the apparatus can not be tested, and both the normal wiring lamp (LP ₁ ) and the abnormal wiring lamp (LP ₂ ) , It can be understood that the power supply side is abnormal or the grounding state of the electric equipment is ungrounded.

As described above, the grounding state display device according to the present invention is a device for judging whether or not a protective ground to be installed for preventing an electric shock hazard is normally connected, a state of a grounded state is good, It can be read easily and easily by people without knowledge. It can be used as a safety device to prevent electric shock and electric fire caused by faulty grounding and electric leakage when installed in main electric machine and electric appliance, . In addition, it improves the electric safety consciousness of the general public without expertise in electricity.

It should be apparent that the present invention is not limited to the above-described embodiment, and many modifications may be made by those skilled in the art without departing from the spirit of the present invention.

Claims (6)

A danger voltage detection sensitivity controller connected to an enclosure connection terminal connected to an enclosure of the electric device and detecting an entry of an enclosure electric potential larger than a set voltage; A rated voltage detection sensitivity adjuster connected to an enclosure connection terminal connected to an enclosure of the electric device and detecting an input of an enclosure electric potential lower than a set voltage; A hazard display part connected to the hazard voltage detection sensitivity adjusting part and connected to the voltage line and the neutral line to drive the light emitting part according to the voltage detected by the dangerous voltage detection sensitivity adjusting part, A state display unit connected to the neutral line and configured to include a rated display unit for driving the light emitting unit by amplifying the voltage detected by the rated voltage detection sensitivity adjusting unit; A polarity discrimination unit connected to the voltage line and the neutral line for checking a polarity of a power source for operation of the circuit; And And a three-phase power supply unit connected to the voltage line and having a terminal for connecting a power line of an electric device using a three-phase power source. The apparatus of claim 1, wherein the danger voltage detection sensitivity adjuster A first capacitor with one end is connected to the enclosure, connection terminals (TP _C) connected to the electronic equipment housing (C _1); A first variable resistor (R ₁ ) having one end connected to the other end of the first capacitor (C ₁ ) and the other end connected to a neutral line; Said first node side connected to the variable resistance (R ₁₎ a first diode (D _1); And And a third fixed resistor (R ₃ ) connected to the cathode side of the first diode (D ₁ ). The apparatus of claim 1, wherein the rated voltage detection sensitivity adjuster A second capacitor (C ₂ ) one end of which is connected to an external connection terminal (TP _C ) connected to the enclosure of the electronic device; A second variable resistor (R ₂ ) having one end connected to the other end of the second capacitor (C ₂ ) and the other end connected to a neutral line; A second diode-node side connected to the second variable resistor _{(R 2) (D 2)} ; A fourth fixed resistor R ₄ connected to the cathode side of the second diode D ₂ ; And The fourth fixed resistor (R ₄₎ extending on one side of which is connected to the other side of the fixed resistor 14, the ground state display apparatus which is characterized by being a (R ₁₄₎ connected to the contact apseon. The apparatus according to claim 1, wherein the status display unit A first transistor Q ₁ having a base connected to the third fixed resistor R _{3 of} the hazard voltage detection sensitivity adjuster 1 and an emitter connected to a neutral line; Wherein the first 1LED one side is connected to the collector of the first transistor _{(Q 1) (LED 1)} ; A fifth diode (D ₅₎ connected to the cathode side to the other side of the first 1LED (LED _1); A seventh fixed resistor R ₇ having one side connected to the node side of the fifth diode D ₅ and the other side connected to the voltage line; And And the fifth diode (D ₅₎ being connected to one side to the cathode side of the other end of the fifth variable resistor ground state display apparatus which is characterized by being a (R ₅₎ connected to the neutral conductor. The apparatus according to claim 1, wherein the status display unit A second transistor Q ₂ having a base connected between the fourth fixed resistor R ₄ and the fourteenth fixed resistor R _{14 of} the rated voltage detection sensitivity adjuster ₂ ; A third transistor Q ₃ which is Darlington connected to amplify the current to the second transistor Q ₂ and whose emitter is connected to the voltage line; A second LED (LED ₂ ) having one side connected to the collector of the second transistor (Q ₂ ) and the third transistor (Q ₃ ); Wherein 2LED sixth diode cathode is connected to the other side of the _{(LED 2) (D 6)} ; An eighth fixed resistor R ₈ having one end connected to the node side of the sixth diode D ₆ and the other end connected to the voltage line; And The sixth diode (D ₆₎ being connected to one side to the cathode side of the other end of the sixth ground state display apparatus which is characterized by being a variable resistor (R ₆₎ connected to the voltage line. The apparatus of claim 1, wherein the polarity determination unit A tenth fixed resistor R ₁₀ having one end connected to the voltage line power supply terminal TP _H ; The tenth node is connected to a fixed resistor to the other terminal of the (R ₁₀₎ a seventh diode (D _7); A normal connection lamp LP ₁ connected to the cathode of the seventh diode D ₇ ; A power supply polarity reading terminal TP _P extended to the normal wiring lamp LP ₁ ; The one end is connected to the neutral power source terminal (TP _N) a ninth fixed resistor (R _9); The ninth fixed resistor (R ₉₎ to which the node is connected to the other end of the eighth diode (D _8); And The eighth diode (D ₈₎ the cathode side of which is connected to the other side ground state display apparatus according to claim consisting of the abnormal wiring lamp (LP ₂₎ connected to the power supply polarity read terminal (TP _P) for the.