KR101187728B1 - Apparatus for monitoring power distribution board - Google Patents

Abstract

PURPOSE: A panel board monitoring device is provided to inspect the operation state of a circuit breaker and the insulation state of a load line without a special insulation resistance measuring device. CONSTITUTION: A panel board monitoring device is composed of a measuring part(110) and a selecting part(120). The measuring part connects an output terminal, an AC power line, a neutral line and an operation power source to an input terminal. The measuring part protects a circuit from a surge voltage and an AC voltage. The measuring part measures the state of a circuit breaker and outputs a measured state signal through the output terminal. The selecting part receives the measured signal of the measuring unit, selects a circuit breaker to be inspected, and outputs a signal according to the measured state. [Reference numerals] (110) Measuring part; (120) Selecting part

Description

Distribution board monitoring device {Apparatus for monitoring power distribution board}

The present invention relates to a distribution panel monitoring device, and more particularly, to a distribution panel monitoring device that can be easily mounted and mounted on the distribution panel to easily check and monitor the operation state of the over current circuit breaker, the circuit breaker, etc. .

In general, the distribution panel is used for the purpose of distributing or distributing external electricity to a consumer, and is a device that is connected to each other by installing a main switch, a wiring circuit breaker, and an earth leakage circuit breaker. In the indoor wiring of a building or the like, the power distribution board branches and wires power to each element of the indoor through the trunk wired from the distribution board, and simultaneously opens and closes the power supply.

The main interrupter serves to start or block the supply of all power wired from the distribution panel to each element, and the circuit breaker serves to protect various circuits from overload by cutting off electricity when excessive line current flows above the rated current. In addition, an earth leakage breaker also serves to cut off electricity when an earth leakage current or an over current flows above the rated earth leakage sensitivity current.

As described above, the distribution board plays an important role in the wiring of the power system and should be checked regularly. When a problem occurs, it should be checked and repaired immediately so that there is no disruption in the distribution of power indoors such as buildings. However, in the case of regular inspections of the distribution boards, or in the case of problems and checks and repairs, the professional technicians can check only by specialized devices such as insulation measuring instruments, so that immediate measures on the customer's own monitoring or inspection and inspection results are taken. There is a difficult problem.

In addition, a malfunction or malfunction caused by abnormality of various circuit breakers provided in the distribution panel itself is not provided at any time and on a regular basis, and is not provided. There is no monitoring and indication or alarm function of the cause of the breaker breaking action. Therefore, it is urgently needed to monitor and check the wiring as well as various circuit breakers mounted on the distribution boards, and to monitor the display when there is an abnormality and to prevent electrical accidents from occurring at regular intervals.

Republic of Korea Patent Publication No. 10-1129254 (2012.03.15) Republic of Korea Patent Publication No. 10-1036544 (2011.05.17) Republic of Korea Patent Publication No. 10-0911734 (2009.08.04) Republic of Korea Patent Publication No. 10-0678415 (2007.01.29) Republic of Korea Patent Publication No. 10-0572623 (2006.04.13)

Accordingly, an object of the present invention is to mount on the distribution panel to easily monitor the operation state related to the interruption and feeding of the over-current circuit breaker, earth leakage circuit breaker, etc. of the distribution panel and the insulation of the load line (wiring), to prevent electrical accidents such as electric fires in advance. To provide a distribution panel monitoring device that can be.

In addition, another object of the present invention is to provide a distribution panel monitoring device that is mounted on the distribution panel to easily analyze the cause of the interruption operation of the over-current circuit breaker, earth leakage circuit breaker, etc. of the distribution panel to enable a quick and accurate action.

In addition, another object of the present invention is to be mounted on the distribution panel to easily check the operation status of the over-current circuit breaker, earth leakage circuit breaker, etc. of the distribution panel and the insulation of the load line (wiring), without the need for a separate measuring device or expertise, regular or frequent It is to provide a distribution panel monitoring device that can prevent various kinds of electrical accidents, including power failure.

Distribution board monitoring apparatus according to the present invention for achieving the above objects, in the monitoring device of the distribution panel having a plurality of breakers, the output terminal of the circuit breaker, the neutral line of the AC power line and the operating power and the input terminal is connected respectively; A measuring unit which protects the circuit from AC voltage and surge voltage, measures the state of the circuit breaker, and outputs the measured state signal through an output terminal; And receiving a measurement signal measured by each of the plurality of circuit breakers in the measurement unit, selecting a circuit breaker to be checked among the plurality of circuit breakers, outputting a signal according to a measurement state, and outputting an output value corresponding to the output signal to a visual means. Selector for displaying; characterized in that it comprises a.

In this case, the measuring unit of the distribution panel monitoring device according to the present invention, the comparison resistance is connected to the output terminal of the circuit breaker to know the insulation resistance value between the ground, and the protection connected to the operating power source to protect the measuring unit from AC voltage It consists of a resistor, a protection diode connected between the operating power supply and a neutral wire to protect the measurement unit from the AC voltage and surge voltage, a reverse flow prevention diode for preventing an error when connecting an external measuring device, and a noise filter capacitor. It is characterized by.

The selector of the distribution panel monitoring apparatus according to the present invention may include an address selection terminal to select a circuit breaker to be checked among the plurality of circuit breakers, and to visually display output values (high, low and 60 Hz square wave) of the output terminal. And display means for displaying.

The output terminal of the selector of the distribution panel monitoring apparatus according to the present invention outputs a low signal indicating an insulation failure when the inter-earth insulation resistance value is smaller than the comparison resistance value, and the earth-to-earth insulation resistance value is the comparison resistance. If it is larger than the value, it is characterized by outputting a high signal indicating good insulation.

As described above, the present invention can check the operation state of the breaker by monitoring and displaying a plurality of breaker circuits provided in the distribution panel, and there is an advantage of checking the insulation state of the load line without a separate insulation resistance meter.

In addition, the present invention has the advantage of being able to remotely monitor a plurality of circuit breakers provided in the distribution panel.

In addition, the present invention has the advantage that the non-expert can easily check the insulation state of the plurality of circuit breakers and wiring provided in the distribution panel easily or regularly.

Accordingly, there is an effect that it is possible to prevent various electrical accidents, and to quickly take action at an early stage.

In addition, the present invention is capable of monitoring and checking a plurality of circuit breakers, and the diagnosis is simply performed while the circuit breaker is temporarily turned off, thereby enabling the inspection of the circuit breaker and the load line without a power failure.

In addition, the present invention has the advantage that the ON / OFF state of the circuit breaker and the insulation state of the load circuit can be monitored from a remote location.

1 is a circuit diagram showing a connection state of a switchgear monitor and a circuit breaker according to the present invention;
2 is a circuit diagram of a distribution panel monitoring apparatus according to the present invention;
3 is a control flowchart of a distribution panel monitoring apparatus according to the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. It should be noted that the same configurations of the drawings denote the same reference numerals as possible whenever possible. Specific details are set forth in the following description, which is provided to provide a more thorough understanding of the present invention. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Here, the breaker has been described as an example of an electric leakage breaker (ELB), but this is just described as an example includes a circuit breaker such as NFB (No Fuse Breaker) and MCCB (Molded Case Circuit Breaker), The structure and operation of the circuit breaker are well known technologies, and thus detailed descriptions thereof will be omitted.

1 is a circuit diagram showing a connection state of a switchgear monitoring device and a breaker according to the present invention, as shown in the distribution board monitoring device 100 according to the present invention to monitor the eight breakers up to breaker 0 ~ breaker 7 (200) It can be added or reduced as needed.

First, referring to FIG. 1, when the distribution board monitoring apparatus 100 according to the present invention looks at the circuit connection structure in the distribution panel, circuit breakers 0 to circuit breakers 7 (7) connected to the active line Vin and the neutral line Com of the AC power line, respectively ( 200, the positive input terminal Vp of the distribution panel monitoring apparatus 100 according to the present invention is an operating power source (12 V for convenience), and the negative input terminal G / N is a neutral wire Com. The monitoring line output terminals Vout0 to Vout7 are connected to the output of the breaker 200 to be monitored.

FIG. 2 is a circuit diagram of a distribution panel monitoring apparatus according to the present invention, and the configuration and operation of the distribution panel monitoring apparatus 100 according to the present invention will be described in detail with reference to FIG. 2. As shown in FIG. 2, the distribution panel monitoring apparatus 100 according to the present invention includes a measurement unit 110 and a selection unit 120.

The measuring unit 110 is connected to the output terminal (Vout5), the neutral line (N) of the AC power line and the operating power (Vp) of the breaker 200 to be measured, respectively, the input terminal is connected to protect the circuit from AC voltage and surge voltage And measure the state of the breaker 200, and transmits the measured state signal to the selection unit 120 through the output terminal.

The selector 120 receives a measurement signal measured by each breaker 200 from the measurement unit 110, selects measured data, and outputs a signal according to a measurement state, and outputs a letter or a symbol. It consists of a selection unit 120 to display. To this end, the selector 120 forms an address (for example, 3-stage binary code), and displays the output value (H, L, 60 Hz AC current) of the output terminal Z as a letter or a symbol mark. do. The address selection terminals A, B, and C are input terminals for circuit breaker 200 selection.

When the configuration of the measuring unit 110 is described in detail, the comparison resistance (R1) and the AC voltage (220V) connected to the output terminal (Vout5) of the circuit breaker 200 to know the unknown ground-to-earth insulation resistance (Rx) value In order to protect the measuring unit 110 from the protection resistor (R2) connected to the operating power supply (Vp), and the operating power supply (Vp) and to protect the measuring unit 110 from the AC voltage (220V) and surge voltage Protective diodes D1 and D2 connected between the neutral wires D / N, backflow prevention diodes D3 to prevent errors when connecting insulation resistance measuring instruments (mega testers), and capacitors for noise filters (C1). It consists of.

In general, the insulation resistance (Rx) between the ground and the AC voltage (220V) determines whether or not the basis of 0.2MΩ, so if Rx = 0.2MΩ and the comparative resistance (R1) is set to 0.2MΩ, the protection resistance (R2) The resistance value is determined as 0.4 MΩ. That is, when Rx + R1 = R2, a voltage corresponding to 1/2 of the operating power source Vp is formed at the input terminal X5 of the selector 120, and the insulation resistance Rx between the grounds is 0.2 MΩ. If smaller (bad insulation), the "L" signal is output, and if the earth resistance (Rx) is greater than 0.2 MΩ (good insulation), the "H" signal is output from the output terminal Z of the selector 120. .

Among the output signals of the output terminal Z of the selector 120, the “L” signal and the “H” signal are signals output as a measurement result when the circuit breaker 200 is turned off, and the circuit breaker 200 is turned on. In the state, a square wave of 60 Hz is output with respect to the AC voltage 220V.

Hereinafter, a signal processing procedure of the distribution panel monitoring apparatus 100 according to the present invention will be described in detail with reference to FIG. 3. 3 is a control flowchart of a distribution panel monitoring apparatus according to the present invention.

As shown in the circuit diagram of FIG. 2, in a state in which the distribution panel monitoring apparatus 100 according to the present invention is connected to the circuit breaker 200 to be measured, the state of the circuit breaker 200 and the insulation state of the load circuit are checked.

First, when operating the distribution panel monitoring apparatus 100 according to the present invention in the state that the power supply of the circuit breaker 200 is normally supplied, it is determined whether the square wave signal of 60 Hz is output from the output terminal Z of the selector 120. (Step 301). When the square wave signal of 60 Hz is output in step 301, the process proceeds to step 303 to determine whether there is a cutoff signal by the auxiliary device of the breaker 200. If there is no blocking signal by the auxiliary device in step 303, the process proceeds to step 305 to indicate that the breaker 200 is in a normal state and ends.

On the other hand, if there is a blocking signal by the auxiliary device in step 303 in step 307 indicates that the breaker 200 is a very dangerous state of the energized state and ends. In the state of the circuit breaker 200 displayed in step 307, the auxiliary device generates a trip signal of the circuit breaker 200, but the power is continuously supplied to the circuit breaker 200, or the circuit breaker 200 is in a broken state 1 , A situation occurs in the breaker 200 in which the secondary circuit is installed upside down.

Next, when the high (H) signal is output from the output terminal Z of the selector 120 in step 301, the process proceeds to step 309 to determine whether there is a blocking signal by the auxiliary device of the circuit breaker 200. . If there is a blocking signal by the auxiliary device in step 309, since the circuit breaker 200 is turned off by the auxiliary device, the process proceeds to step 311 to indicate that the insulation is in a good state and ends.

On the other hand, if there is no blocking signal by the auxiliary device in step 309, the circuit breaker 200 is cut off by its own function irrespective of the auxiliary device, and if it is blocked by overcurrent, it is blocked by the operator's operation. Both cases and cases blocked by the Test button operation are included. Therefore, if there is no blocking signal by the auxiliary device in step 309, since the circuit breaker 200 is turned off by its own function due to the above three cases, the process proceeds to step 313 to indicate that the insulation is in a good state and ends.

In this case, if it is cut off by the operator's operation and if it is cut off by the test button operation, it is artificially turned off, so the breaker that is normally turned off can be monitored by using the DIP switch. Can be configured to choose whether or not.

Lastly, when the LOW (L) signal is output from the output terminal Z of the selector 120 in step 301, the insulation measurement result is 0.2 MΩ or less when the power of the circuit breaker 200 is turned off. The flow proceeds to step 315 to indicate that the insulation is in a bad state and ends.

Table 1 below summarizes the signal processing results performed by the distribution panel monitoring apparatus 100 according to the present invention.

As described above, the distribution panel monitoring apparatus according to the present invention is mounted on the distribution panel to easily monitor the operation state and the insulation state of the load line (wiring), such as the over-current breaker, earth leakage breaker, etc. of the distribution panel, electrical fire, etc. Electric accident can be prevented beforehand.

In addition, the distribution panel monitoring apparatus according to the present invention is mounted on the distribution panel to easily analyze the cause of the interruption operation of the over-current circuit breaker, earth leakage circuit breaker, etc. of the distribution panel to enable a quick and accurate action.

In addition, the distribution panel monitoring device according to the present invention is easily mounted on the distribution panel to easily interrupt or feed the operating state of the distribution panel and the insulation of the load line (wiring), such as overcurrent circuit breaker, earth leakage circuit breaker, etc. By checking the power supply, various electric accidents including power failure can be prevented.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

Claims (4)

In the monitoring device of the distribution panel having a plurality of breakers,
The output terminal of the circuit breaker, the neutral line of the AC power line and the operating power supply are respectively connected to the input terminal to protect the circuit from AC voltage and surge voltage, measure the state of the circuit breaker, and output the measured state signal through the output terminal. Measuring unit; And
The measuring unit receives a measurement signal measured by each of the plurality of circuit breakers, selects a circuit breaker to be checked among the plurality of circuit breakers, outputs a signal according to a measurement state, and displays an output value corresponding to the output signal on a visual means. Distribution panel monitoring device comprising a.
The method of claim 1, wherein the measuring unit,
Comparative resistance connected to the output terminal of the circuit breaker to know the insulation resistance value between the ground,
A protection resistor connected to the operating power source to protect the measurement unit from an AC voltage,
A protection diode connected between the operating power source and a neutral wire to protect the measurement unit from the AC voltage and the surge voltage;
A backflow prevention diode that prevents errors when connecting an external meter;
Distribution board monitoring device comprising a capacitor for a noise filter.
The method of claim 2, wherein the selection unit,
Display means for displaying the output of the output terminal (High, Low, and 60Hz square wave) of the plurality of circuit breakers, including an address selection terminal to select the circuit breaker to be checked; Device.
The output terminal of claim 3, wherein the output terminal of the selector is
When the inter-earth insulation resistance value is smaller than the comparison resistance value, a low signal indicating insulation failure is output; when the inter-earth insulation resistance value is larger than the comparison resistance value, a high signal indicating good insulation is output. Distribution board monitor.

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