KR101812767B1 - Switchboard for easy change leakage current of earth cable - Google Patents

Abstract

The present invention relates to a switchboard allowing easy replacement of a leakage current detection part of a ground wire, comprising: a leakage current detection part connected to a plurality of ground wires to convert measured current into a predetermined digital signal; a relay circuit part selectively inputting and outputting current measured at each ground wire; an input part setting an operation reference value to be compared with the digital signal of the current measured through the ground wire; a control part comparing the digital signal measured at the ground wire with the operation reference value to determine a state of the ground wire; an alarm part generating an alarm signal regarding a state of the ground wire in accordance with determination of the control part; and a display part displaying a state of the ground wire in accordance with determination of the control part and a leakage current value measured at the ground wire. The leakage current detection part comprises: a main body case installed on a ground surface and having a space part formed therein; a ground plate inserted into a first coupling groove part and a second coupling groove part, which are formed at both ends of the main body case, and connected to the ground wire to provide leakage current; a current detection sensor installed on the main body case and electrically connected to the ground plate to detect leakage current and transmit a detection signal; a grounding block electrically connected to the current detection sensor when the current detection sensor is installed inside the main body case to transmit a signal transmitted from the current detection sensor; and a replacement part maintaining a state that the separate current detection sensor is received in the main body case when the current detection sensor is separated from the main body case.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electrical switchgear,

More particularly, the present invention relates to an electrical switchboard that can be replaced with a current sensing sensor constituting a leakage current sensing unit. The switchboard is connected to a plurality of ground lines to measure a current Which is capable of easily replacing the remaining current sensing sensor before a failure occurs, without interrupting the sensing operation by any one of the current sensing sensors of the plurality of current sensing sensors of the leakage current sensing unit for converting the current sensing sensor into a predetermined digital signal The present invention relates to an electric distribution panel in which a current detection unit can be easily replaced.

In general, the switchboard is installed in a building or the like, and installed indoors or outdoors in a factory, a large building or a substation where a large amount of electricity is consumed. The switchboard controls the operation of a generator or a transformer, And an instrument are arranged and fixed.

Such switchboards are installed in building electrical equipment of a certain scale or more and are installed in a building electrical equipment of a certain size or more to block or interfere with excessive current caused by a short circuit or ground fault in the distribution system and various branch lines, To prevent a fire accident such as a fire accident.

In the conventional switchboard, a leakage current sensing device is installed so that the leakage state can be displayed step by step according to the set value, thereby allowing the manager to easily observe the leakage current per each circuit by the naked eye to efficiently perform the safety management of the electric facility .

However, the conventional leakage current detecting device installed in the switchboard is only connected to the power distribution line, and it can only detect the electric leakage of the electric equipment. It detects the leakage current to the ground wire of the first kind, second kind, I could not.

Even if the ground wire is checked, it is troublesome to connect a separate portable device such as an electric voltage tester every time of inspection, and it is impossible to measure the leakage current of the ground wire in real time.

It was impossible to check the grounding (insulation) state in real time through the switchboard, so that it was impossible to prevent the damage of the parts of the switchboard due to the leakage current and the safety accident in advance, There was a waste problem.

In addition, the present invention relates to a method and apparatus for detecting the presence of a ground wire (hereinafter, referred to as "ground wire ") which has received a patent (registration date: 2011.12.14, registration number: 10-1016378) In order to check the leakage current of the switchboard from time to time, it is necessary to prevent the administrator from visiting the site where the switchboard is installed, There is a need to perform safety management of the switchboard more efficiently by measuring in real time, and a device capable of collecting and accumulating various data related to the internal state of the switchboard is required.

In order to solve the above problems, an electric distribution board having a data storage function has been developed. The electric distribution board according to the related art includes a leakage current detection unit, a vibration detection sensor for detecting vibration due to an external force including an earthquake, It is equipped with a wireless communication unit which can wirelessly transmit signals of various sensors and sensors including sensors, so that the amount of leakage current through the ground line of the switchboard and the internal state of the switchboard can be remotely measured and controlled in real time, It has features to prevent damage to the product and power loss, and to prevent safety accidents due to the hall of the switchboard.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Registration No. 10-1597096 (published on Feb. 24, 2016, entitled " Vibration Detection and Real Time Remote Measurement of Leakage Current, ).

There is a problem that a leakage current may not be detected when the leakage current sensing unit is replaced and leakage current may occur during the replacement operation of the leakage current sensing unit to cause a safety accident.

Therefore, there is a need for improvement.

The present invention relates to a method for detecting a leakage current of a current sensor connected to a plurality of ground lines and converting a current measured to a predetermined digital signal among a plurality of current sensors of a current sensor, An object of the present invention is to provide an electrical switchboard which can easily replace the remaining current sensor before a failure occurs without interrupting sensing operation by one current sensor.

The present invention relates to a semiconductor integrated circuit comprising: a leakage current sensing unit connected to a plurality of ground lines to convert a predetermined digital signal into a measured current; A relay circuit part for selectively inputting and outputting a current measured at each of the ground lines; An input unit for setting an operation reference value to be compared with a digital signal of a current measured through the ground line; A controller for comparing the digital signal measured at the ground line with the operation reference value to determine a state of the ground line; An alarm unit for generating an alarm signal for the ground line according to the judgment of the control unit; And a display unit for displaying a state of a ground wire according to a judgment of the control unit and a leakage current value measured at a ground line, wherein the leakage current sensing unit comprises: a main body case installed on the ground and having a space therein; A ground plate inserted into the first engagement recess and the second engagement recess formed at both ends of the body case and connected to the ground line to provide a leakage current; A current detection sensor installed in the main body case and electrically connected to the ground plate to sense a leakage current and transmit a detection signal; A grounding block electrically connected to the current sensing sensor to transmit a signal transmitted from the current sensing sensor when the current sensing sensor is installed inside the main body case; And a replacement unit that maintains a state in which the current sensing sensor is accommodated in the main body case when the current sensing sensor is detached from the main body case.

In addition, a seating groove portion is formed at both ends of the body case of the present invention to receive the end portion of the current sensing sensor, and the seating groove portion is formed to communicate with the first joining groove portion and the second joining groove portion, .

The replacement unit may include a pair of disk members having a plurality of grooves formed thereon so as to seat the plurality of current sensing sensors and a rotary shaft connecting the disk members and rotatably arranging the disk members, And a nut coupling portion is provided at a center portion thereof so that a pinion inserted from an outer wall of the main body case is coupled and driven.

The present invention provides a switchboard which is easy to replace a leakage current detecting part of a ground wire according to the present invention, which measures the amount of current leaking through a ground line of an ASSEMBLY in real time to prevent parts damage and safety accidents due to poor grounding, And the amount of current leaked through the ground line of the switchboard is measured by the operation of another current sensor even when one of the current sensors of the plurality of current sensors forming the leakage current sensor is replaced. There is an advantage to be able to do.

FIG. 1 is a block diagram showing a basic configuration of an ASSEMBLY according to an embodiment of the present invention. FIG.
FIG. 2 is an exemplary view showing a structure in which a switchboard for easy replacement of a leakage current sensing unit of a ground wire according to an embodiment of the present invention is connected to a ground line. FIG.
FIG. 3 is an exploded perspective view illustrating a leakage current sensing unit of a switchboard, which facilitates replacement of a leakage current sensing unit of a ground wire according to an embodiment of the present invention.
FIG. 4 is an operational state diagram illustrating a leakage current sensing unit of a switchboard, which facilitates replacement of a leakage current sensing unit of a contact line according to an embodiment of the present invention.

Hereinafter, an embodiment of an electrical switchboard according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a block diagram showing a basic configuration of a switchboard for easily replacing a leakage current sensing unit of a grounding line according to an embodiment of the present invention. FIG. 2 is a circuit diagram of a leakage current sensing unit according to an embodiment of the present invention. Fig. 8 is an exemplary diagram showing a structure in which an easy distribution board is connected to a ground wire.

FIG. 3 is an exploded perspective view illustrating a leakage current sensing unit of a switchboard in which a leakage current sensing unit of a ground wire can be easily replaced according to an embodiment of the present invention. FIG. 4 is a cross- The leakage current sensing portion of the switchboard which is easy to replace is an operational state diagram shown.

Referring to FIGS. 1 to 4, the switchboard of the present invention, which is easy to replace the leakage current sensing unit of the ground wire, includes a leakage current sensing unit 10, a relay circuit unit 56, an input unit 50, An alarm unit 52, a display unit 54, a communication unit 40, and a power supply unit 30.

Inputs A, B, and C of the leakage current sensing unit 10 are connected to the ground line of the switchboard by terminals to which the leakage current sensing unit 10 is connected.

In this way, through the leakage current detection unit 10, the present invention measures the amount of current leaked to the ground line of the power distribution board in real time, thereby preventing parts damage and safety accidents due to the ground fault in advance, .

The switchboard according to the present embodiment includes a leakage current sensing unit connected to a plurality of ground lines to convert a measured digital signal into a predetermined digital signal, a relay circuit unit for selectively inputting and outputting a current measured at each ground line, A control unit 100 for determining a state of a ground line by comparing an operation reference value with a digital signal measured at a ground line, a control unit 100 for determining a state of a ground line, And a display unit for displaying the state of the ground wire according to the judgment of the control unit 100 and the leakage current value measured at the ground line.

Here, the leakage current sensing unit includes a main body case 12 provided on the ground and having a space therein, a first coupling groove 14a and a second coupling groove 14b formed at both ends of the main body case 12, A current sensor (not shown) installed in the main body case 12 and electrically connected to the ground plate 15 to sense the electroluminescence current and to transmit the detection signal, A grounding block 16 electrically connected to the current sensing sensor 11 to transmit a signal transmitted from the current sensing sensor 11 when the current sensing sensor 11 is installed inside the main body case 12, And a replacement unit 70 for maintaining the state in which the current sensor 11 is accommodated in the body case 12 when the current detection sensor 11 is removed.

When the ground plate 15 having the cable connected to the ground line is inserted into the first engagement groove 14a and the second engagement groove 14b formed at both ends of the body case 12, The current is detected along the cable connected to the ground line by the surface contact being formed.

A grounding block 16 is provided on the inner wall of the center of the case to contact the current sensing sensor 11. A sliding groove 17 is formed in a ring shape on the circumference of the grounding block 16, 11 can be rotated while the sliding protrusion 20 formed at the center of the sliding protrusion 20 is inserted into the sliding groove 17 and grounded.

Therefore, it is possible to sense the leakage current from the ground wire while being rotated by the operator.

The seating groove 19 is formed at both ends of the body case 12 with a first engagement groove 14a into which the ground plate 15 is inserted, 2 coupling groove portion 14b.

The cap member 112 is slid on the upper portion of the seating groove 19 to form a discharge groove 19a which can be separated from the seating groove 19.

Since the separation preventing portions 110 for preventing the current sensing sensors 11 from being separated from the seating recesses 19 are provided at both ends of the current sensing sensor 11, The connection state is maintained.

The departure prevention unit 110 includes a cap member 112 having a locking protrusion so as to protrude and retract from the end of the current sensing sensor 11 and a step portion 116 to which the locking protrusion is slidably inserted and engaged with the locking protrusion, And an elastic member 118 which is interposed between the locking projection and the step portion 116 and presses the cap member 112 outward from the current sensing sensor 11. [

Therefore, when the current detection sensor 11 is placed inside the main body case 12, the cap member 112 is protruded by the urging force of the elastic member 118 and is slidable with respect to the inner wall of the case main body and the battery board 15 Thereby maintaining the contact state.

The replacement portion 70 includes a pair of disk members 72 having a plurality of groove portions 72a and 72b formed thereon so as to seat the plurality of current sensing sensors 11 and a pair of disk members 72, And a pinion 82 inserted from the outer wall of the main body case 12 is coupled to the central portion of the outer wall of the disc member 72 so as to be driven, do.

When the current sensor 11 is removed from the main body case 12 and replaced, the lever member 80 and the pinion 82 are inserted into the main body case 12 such that the pair of current sensors 11 are exposed to the upper surface of the main body case 12, Hole 86 formed at both ends of the disk member 12 and inserted into the nut coupling portion 84 formed on the outer wall of the disk member 72. [

The pinion 82 provided on the lever member 80 is inserted into the main body case 12 through the through hole 86 and is engaged with the disc member 72 and then the lever member 80 is rotated, The groove portions 72a and 72b slide the current sensing sensor 11 from the ground plate 15 while the current sensing sensor 11 desired by the operator is exposed through the opening in the upper portion of the main body case 12 .
Thereafter, even if one of the current sensors 11 is disconnected from the main body casing 12 through the discharge groove 19a, the remaining current sensors 11 can be contacted to the ground plate 15 and the ground block 16 The leakage current is detected.

Reference numerals 14c and 14d denote a first interference trench 14c and a second interference trench 14d for preventing a cable connected to the ground plate 15 from being inserted and preventing the cable from interfering with the main body case 12 .

Reference numerals 72a and 72b denote a first groove portion 72a and a second groove portion 72b formed in the disk member 72 and on which a plurality of current sensing sensors 11 are mounted.

A first groove portion 72a and a second groove portion 72b are formed in the disk member 72 of the present embodiment so that a pair of current sensing sensors 11 can be installed and the first groove portion 72a and the second groove portion 72b 72b are arranged so as to be opposed to each other with an interval of 180 ° so that the operator rotates the lever member 80 so that any one current sense sensor 11 of the pair of current sense sensors 11 is rotated by the ground block 16, One current sensing sensor 11 among the pair of current sensing sensors 11 is disposed on the upper side of the opening of the main body casing 12 so that the sliding protrusions 20 Is separated from the sliding groove portion 17.
Therefore, since a pair of current sensors 11 are normally installed so as to be slidable between the pair of disk members 72, the amount of current is sensed by the pair of current sensors 11, and a pair of currents While the current sensor 11 of any one of the sensors 11 is being replaced, the current sensor 11 can sense the current.

When the current detection sensor 11 is replaced, any one of the pair of current detection sensors 11 is electrically opened to perform a leakage detection operation, The other current sensing sensor 11 is exposed to the outside through the opening in the upper part of the main body case 12 and pulls the current sensing sensor 11 disposed on the upper side of the main body case 12 to the upper side of the main body case 12, The current sensor 11 can be easily replaced while the current sensor 11 is separated from the outside.
As described above, in this embodiment, since a pair of current sensing sensors 11 are arranged side by side in the horizontal direction between the pair of disk members 72, a pair of current sensing sensors 11 The pair of current sensing sensors 11 are connected in parallel so that the pair of current sensing sensors 11 are connected in parallel to each other so that the pair of current sensing sensors 11 are connected in parallel to the grounding block 16. [ The amount of current measured by the current detection sensor 11 is added up to measure the leakage current.
When the current sensor 11 of one of the pair of current sensors 11 is to be replaced, the lever member 80 is rotated so that any one of the pair of current sensors 11 11 are moved upward to separate the grounding block 16 and one of the current sensing sensors 11 and the other current sensing sensor 11 remains connected to the grounding block 16. [
Thereafter, a state in which one current sensing sensor 11 is separated from the pair of disk members 72 by the operation of the operator and the current amount of the entire current is determined from the other current sensing sensor 11 maintain.

As described above, when the operator pulls the current sensing sensor 11 to the upper side of the main body case 12 by using a tool or a hand with insulating gloves, the elastic members 118 provided at both ends of the current sensing sensor 11 are compressed The ground plate 15 which is in close contact with the both ends of the current sensing sensor 11 generates current sensed by the current sensing sensor 11 between the pair of ground plates 15, Can be separated to the outside through the opening in the upper part of the main body case 12.

As described above, in this embodiment, while any one of the pair of current sensing sensors 11 is electrically opened to perform the leakage sensing operation, the other one of the pair of current sensing sensors 11 The current sensing sensor 11 of the main body case 12 is exposed to the outside through the opening in the upper part of the main body case 12 and pulls the current sensing sensor 11 disposed on the upper side of the main body case 12 to the upper side of the main body case 12, So that the current sensor 11 can be easily replaced while the current sensor 11 is separated from the outside.

At this time, when the operator pulls the current sensing sensor 11 to the upper side of the main body case 12 using a tool or a hand with insulating gloves, the elastic members 118 provided at both ends of the current sensing sensor 11 are compressed, The ground plate 15 closely attached to the both ends of the detection sensor 11 is connected to the current detection sensor 11 through the pair of ground plates 15 by generating both ends of the current detection sensor 11, And can be separated to the outside through the opening in the upper portion of the case 12 and the discharge groove portion 19a.

Thus, it is possible to provide a ground wire leakage current sensing unit which can be easily replaced before a failure of the leakage current sensing unit occurs without interrupting the sensing operation of the leakage current sensing unit, which is connected to a plurality of ground wires and converts the measured current into a predetermined digital signal, It is possible to provide an easy-to-replace switchboard.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

Although the present invention has been described by way of example with reference to a switchboard in which a leakage current detection unit of a ground wire is easy to replace, the switchboard of the present invention can also be used in products other than the switchboard in which the leakage current detection unit of the ground wire is easily replaced .

Accordingly, the true scope of the present invention should be determined by the following claims.

10: Leakage detection unit 11: Current detection sensor
16: grounding block 17: sliding groove portion
19: seat groove 20: sliding protrusion
70: replacement part 72: disk member
72a: first groove portion 72b: second groove portion
72c: rotating shaft 80: lever member
82: pinion 84: nut coupling part
86: through-hole portion 100:
110: departure prevention portion 112: cap member
114: locking projection 116: stepped portion
118: Elastic member

Claims (3)

A leakage current sensing unit connected to a plurality of ground lines to convert a predetermined digital signal into a measured current;
A relay circuit part for selectively inputting and outputting a current measured at each of the ground lines;
An input unit for setting an operation reference value to be compared with a digital signal of a current measured through the ground line;
A controller for comparing the digital signal measured at the ground line with the operation reference value to determine a state of the ground line;
An alarm unit for generating an alarm signal for the ground line according to the judgment of the control unit; And
And a display unit for displaying a state of the ground wire according to the judgment of the control unit and a leakage current value measured at the ground line,
The leakage current sensing unit may include:
A main body case installed on the ground and having a space inside;
A ground plate inserted into the first engagement recess and the second engagement recess formed at both ends of the body case and connected to the ground line to provide a leakage current;
A current detection sensor installed in the main body case and electrically connected to the ground plate to sense a leakage current and transmit a detection signal;
A grounding block electrically connected to the current sensing sensor to transmit a signal transmitted from the current sensing sensor when the current sensing sensor is installed inside the main body case; And
And a replacement unit that maintains a state in which the current sensing sensor is accommodated in the main body case when the current sensing sensor is detached from the main body case,
Wherein a seating groove portion for inserting an end of the current sensing sensor is formed at both ends of the main case case, the seating groove portion is formed to communicate with the first joining groove portion and the second joining groove portion through which the ground plate is inserted,
Wherein,
A pair of disk members having a plurality of grooves formed thereon so that the plurality of current sensors are seated, and a rotating shaft connecting and rotatably disposing a pair of the disk member inner walls,
A nut coupling unit is provided at a central portion of an outer wall of the disk member so that a pinion inserted from an outer wall of the main body case is coupled and driven,
Since a pair of the current sensing sensors are normally installed so as to be slidable between the pair of disk members and a pair of the current sensing sensors are electrically connected to the ground block, Wherein a current amount is sensed by a sensor and a current amount can be sensed by the other current sensing sensor while the current sensing sensor of one of the pair of current sensing sensors is being replaced. Switchboard with easy to replace current sensing part. delete delete

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