KR102266313B1 - Monitoring system for over-voltage protection and temperature overload of branch circuit - Google Patents

Abstract

The objective of the present invention is to provide a monitoring system to notify a manager of events such as a temperature, an overload, and an overvoltage of a branch circuit through flashing of light, an image, and the like. To this end, disclosed is a device of monitoring a temperature, an overload, and an overvoltage for protecting a branch circuit, which comprises: a measurement module; and an HMI module. The measurement module includes: a first temperature sensor unit which detects a temperature of a bus bar connected to a secondary terminal of a circuit breaker for wiring installed in an electrical facility and converts the temperature into a measurable signal; a second temperature sensor unit which detects an internal temperature of the electrical facility and converts the detected internal temperature into a measurable signal; a third temperature sensor unit which detects an external temperature of the electrical facility and converts the detected external temperature into a measurable signal; a temperature control unit which compares temperature information received from the first to third temperature sensor units with each set value and outputs a control signal in accordance with the calculated result; an LED temperature lamp unit which has a color that changes in accordance with a control signal of the temperature control unit and emits the changed color; and a communication for communicating with an external device. The HMI module is connected to the communication unit, supplies power to the measurement module, and is configured to convert information output from the temperature control unit into a video signal so that the information can be monitored. In accordance with the present invention, by means of the monitoring system, a measurement error caused by a temperature rise can be minimized.

Description

MONITORING SYSTEM FOR OVER-VOLTAGE PROTECTION AND TEMPERATURE OVERLOAD OF BRANCH CIRCUIT

The present invention relates to a monitoring system that notifies a manager with an alarm such as flashing light or image when abnormal conditions such as temperature overload and overvoltage occur in a branch circuit, and more particularly, when the temperature of the branch circuit is higher than a preset reference value It relates to a thermal overload and overvoltage monitoring system for branch circuit protection that prevents and safely manages accidents caused by a sudden rise in temperature or overvoltage exceeding the rated voltage.

Recently, with the rapid development of industry and technology, large-capacity energy supply devices and manufacturing equipment have been increased in capacity, such as ultra-high voltage and large current, in various industrial fields. In order to supply high-quality electrical energy, many efforts have been made to stabilize the power system. have.

In particular, it is necessary to protect the equipment from abnormalities such as overheating, overvibration, and overcurrent by directly installing various sensor modules or measuring instruments in high-voltage transmission and distribution facilities or large-capacity power facilities, and by detecting information such as temperature, vibration, current, and voltage through them. .

On the other hand, a distribution board is a device (electrical equipment) that receives power from a distribution board and distributes it to various devices in a building, factory, or plant. A breaker (Mold Case Circuit Breaker: MCCB) and a measuring instrument that measures physical quantities such as current or voltage between the secondary terminal of this wiring breaker and the load are built-in.

Among them, the instrument is classified into a breaker direct connection type having a busbar directly connected to the secondary terminal of the wiring breaker adjacent to the wiring breaker, and a penetration type in which the bus bar connected to the secondary terminal of the circuit breaker passes through the inside. can

1 shows a wiring breaker and a direct-connection type measuring instrument according to the prior art, which connects the bus bar 44 of the measuring instrument 4 to the secondary terminal of the wiring breaker 3 and connects to the bus bar 44 The voltage of the applied current can be measured and the measured value can be displayed visually.

However, since the conventional measuring instrument 4 has a structure for simply visual display by measuring the voltage of the current flowing through the bus bar 44, when an event such as an abnormal situation occurs, it is difficult to immediately grasp it or respond quickly, so the reliability is quite high. There is a problem with falling.

In addition, in the event of a failure of the measuring instrument 4, field work such as repair or replacement must be performed while the electricity supply is forcibly cut off to the place of use, such as a plant, factory, workshop, building, or data center. There is a limit that is practically impossible to manage and maintain.

On the other hand, conventionally, infrared temperature measuring instruments are used to prevent fire and blackout accidents due to poor connection and deterioration of branch circuits. However, in the case of busbars mainly used as branch circuits, infrared wavelengths are diffracted, resulting in measurement errors and measurement errors. Accurate temperature detection is inevitably impossible because an error occurs.

Moreover, since the internal temperature of electrical equipment is greatly affected by external temperature changes depending on the environment or conditions in which electrical equipment such as switchboards or distribution boards are installed, the standard for judging the internal temperature must be flexibly changed according to the external temperature to ensure reliability. can be improved

The background art or prior art described herein is information possessed by the inventor or acquired in the process of deriving the present invention, and is only intended to help understand the technical meaning of the present invention, and prior to the filing of the present invention, the technology to which this invention belongs It should be noted that it does not mean a technique widely known in the field, and the reference numerals in the prior art are independent of the reference numerals in the present invention.

KR 10-2017-0115799 A (2017.10.18) KR 10-1798760 B1 (2017.11.10) KR 10-2017-0034087 A (2017.03.28) KR 10-1809827 B1 (2017.12.11) KR 10-1299904 B1 (2013.08.19) KR 10-2017-0123086 A (2017.11.07) KR 10-1712985 B1 (2017.02.28) KR 10-1636487 B1 (2016.06.29) KR 10-1313281 B1 (2013.09.24) KR 10-0916146 B1 (2009.09.01) KR 10-1877640 B1 (2018.07.05) KR 20-0372072 Y1 (2004.12.24)

Accordingly, the inventor of the present invention comprehensively considers the above-mentioned matters while solving the technical limitations and problems of the existing branch circuit protection temperature overload and overvoltage monitoring system, always in the same range without warning in a predetermined way. By controlling so that the reference value is automatically changed appropriately according to the ambient temperature, such as temperature change or external temperature, measurement error or measurement error caused by the ambient temperature is minimized, so that the occurrence of abnormal situations can be detected more accurately and the effect can be achieved quickly. , In addition, in the event of a failure of a measuring instrument, it can be easily replaced with a live wire without blocking the flow of electricity, and it is a branch of a new structure that can be used universally regardless of the product type as needed, such as when additionally installed in an existing facility. The present invention was created as a result of continuous research with a lot of effort to develop an overvoltage and overvoltage protection monitoring system for circuit protection.

Therefore, the technical problem and object to be solved by the present invention is a temperature overload and overvoltage monitoring system for branch circuit protection that can minimize measurement errors or measurement errors caused by an increase in ambient temperature by automatically changing the alarm reference value according to the ambient temperature. is to provide

Another technical problem and object to be solved by the present invention is to provide a temperature overload and overvoltage monitoring system for branch circuit protection that can be replaced in an uninterrupted state in case of component failure.

Another technical problem and object to be solved by the present invention is to provide a temperature overload and overvoltage monitoring system for branch circuit protection that can be used universally regardless of existing facilities.

Here, the technical problems and objects to be solved by the present invention are not limited to the technical problems and objects mentioned above, and other technical problems and objects not mentioned will be clearly understood by those skilled in the art from the following description.

A specific means according to an aspect of the present invention for achieving the above object and solving the technical problem is a signal that can be measured by sensing the temperature of the bus bar connected to the secondary terminal of the circuit breaker for wiring installed in the electrical equipment A first temperature sensor unit that converts to , a second temperature sensor unit that detects the internal temperature of the electrical equipment and converts it into a measurable signal, and a third temperature sensor unit that detects the external temperature of the electrical equipment and converts it into a measurable signal , a temperature control unit outputting a control signal according to a result calculated by comparing the temperature information received from the first to third temperature sensor units with each set value, an LED temperature lamp unit blinking according to the control signal of the temperature control unit, and A measurement module configured including a communication unit for communicating with an external device, and an HMI module that is connected to the communication unit to supply power to the measurement module and converts information output from the temperature control unit into a video signal for monitoring and proposes a thermal overload and overvoltage monitoring system for branch circuit protection, characterized in that it is employed.

Accordingly, the present invention detects an abnormal state of the bus bar in real time, calculates and displays temperature information, and transmits it to the outside to enable monitoring from a remote location and improve maintenance efficiency.

In addition, in a preferred embodiment (aspect) of the present invention, the temperature control unit, if the temperature information of the first temperature sensor unit is below a predetermined reference temperature (30 to 40 ℃), it is determined as normal and the LED temperature lamp unit is turned off ( off) outputting normal operation signal information to the HMI module through the communication unit while maintaining the state, and when the temperature information of the first temperature sensor unit is higher than the predetermined reference temperature (30-40°C) within a temperature range of less than 5°C , it is judged as a caution state, and while the LED temperature lamp is blinking at a slow speed, caution signal information is output to the HMI module through the communication unit, and the temperature information of the first temperature sensor unit is set at a predetermined reference temperature (30-40 ℃) If it is higher than 5℃, it is judged as an abnormal state, and the occurrence of an abnormal situation can be more accurately notified by outputting warning signal information to the HMI module through the communication unit while flashing the LED temperature lamp unit at a fast speed.

In addition, in a preferred embodiment of the present invention, the temperature control unit determines that if the temperature information of the third temperature sensor unit is above a predetermined allowable temperature (50° C.), it is determined as an error and an error is sent to the HMI module through the communication unit. signal information is output, and the temperature information of the third temperature sensor unit is less than a predetermined allowable temperature (50°C) and the temperature information of the second temperature sensor unit is within a temperature range of less than 5°C than the temperature information of the third temperature sensor unit If it is high, it is determined that it is normal and outputs normal operation signal information to the HMI module through the communication unit, and the temperature information of the third temperature sensor unit is less than a predetermined allowable temperature (50°C) and the temperature information of the second temperature sensor unit is If it is higher than the temperature information of the third temperature sensor unit within the range of 5 to 10°C, it is judged as caution, and warning signal information is output to the HMI module through the communication unit, and the temperature information of the third temperature sensor unit is a predetermined allowable temperature (50°C) and the temperature information of the second temperature sensor unit is higher than the temperature information of the third temperature sensor unit by more than 10°C, it is determined as an abnormal state and by outputting warning signal information to the HMI module through the communication unit You can respond more quickly to the occurrence of an abnormal situation.

In addition, in a preferred aspect of the present invention, the temperature control unit specifies a normal range of the internal temperature of the electrical equipment detected by the first temperature sensor unit as a plurality of predetermined temperature sections, and sets each upper limit value for each temperature section. A temperature section having a temperature corresponding to the detected temperature of the first temperature sensor unit and a temperature corresponding to the sensing temperature of the second temperature sensor unit by specifying a plurality of variable sections that display the luminescent color by increasing a constant temperature as a reference It is possible to control so that the light emission color of the LED temperature lamp unit is variable or flickering according to the temperature for each variable section having .

That is, the reference value for alarming the temperature overload of the branch circuit by lighting, blinking, or burning of light is appropriately varied in response to the change in ambient temperature, thereby minimizing measurement errors or measurement errors caused by the rise in ambient temperature of the bus bar. In this way, it is possible to more accurately identify the occurrence of an abnormal situation and respond quickly.

In addition, in a preferred embodiment of the present invention, the measurement module has an opposite surface facing the circuit breaker, and one part is arranged to protrude to the outside in order to connect to the secondary terminal of the circuit breaker, and the other is At least two bus bars connected to a load are mounted, and a cradle having a docking unit formed above the bus bar, the first temperature sensor unit and the LED temperature lamp unit are built in to protect and detachably form the docking unit of the cradle, At least one cartridge having at least two connection pins that are elastically contacted by elastic deformation to sense the temperature of the bus bar on the lower surface of the cartridge, and at least one elongated vertically on opposite surfaces of the cradle and the cartridge facing the circuit breaker. It is formed detachably from the above mounting slot and the mounting slot, and is selectively inserted into a mounting groove formed on the sidewall of the secondary terminal of the circuit breaker to separate between the bus bars while maintaining the coupled state with the circuit breaker to insulate and shield By including at least one or more shields, it can be easily replaced with a live wire without blocking the flow of electricity in case of a failure of the measurement module, and regardless of the product type as needed, such as when additionally installed in an existing facility. It can be used universally.

In addition, in a preferred aspect of the present invention, the measurement module is controlled according to the result calculated by comparing the voltage information input from the voltage sensor unit measuring the voltage of the bus bar and the voltage sensor unit with a set value. By further comprising a voltage control unit for outputting a signal and an LED voltage lamp unit that emits light by changing color according to the control signal of the voltage control unit, the current information is monitored and efficiently maintained to prevent the device from being destroyed due to a sudden increase in voltage can be prevented

In addition, at least one coupling groove is formed in the rear part of the docking part, and stoppers are protruded on both sides of the front part of the docking part, and a coupling protrusion fitted into the coupling groove is formed at a position corresponding to the coupling groove of the cartridge. Since a stopper groove into which the stopper is fitted is formed at a position corresponding to the stopper of the cartridge, it can be easily replaced with a live wire without blocking the flow of electricity in the event of a failure of the measurement module, as well as the attachment state of the cradle and the cartridge The stable maintenance and detachment process can be easy and convenient.

An aspect of the present invention having a means and configuration for achieving the above object and solving the technical problem is to detect the temperature change and abnormal state of the branch circuit in real time to calculate and display temperature information in the field, , it is possible to monitor this from a remote location, thereby improving the efficiency of maintenance.

In particular, since the temperature control unit compares the internal and external temperature information of the electrical equipment with the predetermined reference temperature and corrects it appropriately, the temperature of the branch circuit is set to the preset reference value because the LED temperature lamp unit is in the off state, flickers at low speed, or flickers at high speed according to the calculated value. It is possible to accurately notify the occurrence of abnormal situations at the site, such as when the voltage rises to an abnormality or when the overvoltage above the rated voltage flows rapidly, thereby increasing the safety and efficiency of management, such as preventing deterioration or accidents such as fire.

In addition, when a failure or abnormality occurs in the measurement module, there is no need to forcibly cut off the electricity supply to the place of use, such as a factory or workshop, and only the cartridge can be repaired or replaced by simply removing the cartridge. It is possible to improve the maintainability, such as not causing any disruption to production.

In addition, when additionally installed on existing products such as circuit breakers or measuring instruments, it can be installed and used universally regardless of its shape.

That is, since the shield can be separated from the cradle and cartridge of the measurement module, it can be selectively combined and used in common according to the shape or structure of an existing circuit breaker or measuring instrument.

Therefore, since it can be used and digested at the same time by combining two or more functions as a single article, it is possible to maximize usefulness and utility, thereby increasing the convenience of use, such as enhancing economic efficiency.

Furthermore, by controlling the reference value for a visual alarm to be changed automatically according to the ambient temperature change within the electrical equipment, and displaying the luminous color and signal appropriately to the temperature change, measurement error or measurement error caused by the increase in ambient temperature can be minimized, so that the occurrence of an abnormal situation can be more accurately identified and quickly dealt with.

Here, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing a circuit breaker and a measuring device according to the prior art.
2 is a configuration diagram schematically showing a temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention.
3 is a block diagram schematically showing a temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention.
4 is a plan view showing a coupling state of a circuit breaker and a measurement module constituting a temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention.
5 is a perspective view illustrating a measurement module constituting a temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention.
6 is a rear perspective view illustrating a measurement module constituting a temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention.
7 is a cross-sectional view illustrating a measurement module constituting a temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention.
8 is an exploded perspective view of a measurement module constituting a temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention.
9 is a rear perspective view illustrating a cartridge among measurement modules constituting a temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention.
10 and 11 are flowcharts illustrating the control and processing process of the temperature control unit constituting the temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention.
12 is a partial side cross-sectional view showing a coupling state of a measuring module, a voltage measuring instrument, and a circuit breaker for wiring constituting a temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention.

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

Prior to this, the following terms are defined in consideration of the functions in the present invention, and it is specified that they should be interpreted as concepts consistent with the technical spirit of the present invention and meanings commonly or commonly recognized in the art.

In addition, if it is determined that a detailed description of a well-known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

The accompanying drawings show that parts are exaggerated or simplified for the sake of convenience and clarity of explanation and understanding of the configuration and operation of the technology, and it is revealed that each component does not exactly correspond to the actual size and shape.

In addition, in this specification and/or the term "and/or" is meant to include a combination of a plurality of related described items or any of a plurality of related described items, and when a part includes a certain component, it is a particularly opposite description This does not mean that other components are excluded, but other components can be further included.

That is, it means that there is a feature, number, step, operation, component, part, or combination thereof described in this specification, and one or more other features or number, step operation component, part, or a combination thereof It is to be understood that this does not exclude the possibility of the existence or addition of those.

In addition, the meaning of the terms "unit" and "unit" means a module form that performs at least one function or a unit or role for processing a certain operation of a system, which is a combination of hardware or software or hardware and software. It may be implemented as a device or assembly capable of performing an independent operation or a means through such a method.

And terms such as upper, lower, upper, lower, upper, lower, upper, lower, front and rear, left and right are used for convenience to distinguish relative positions of each component. For example, the upper side in the drawing may be named or referred to as the upper side and the lower side as the lower side, the longitudinal direction may be named or referred to as the front-back direction, and the width direction may be named or referred to as the left/right direction.

Also, terms such as first, second, etc. may be used to describe various components. That is, terms such as 1st, 2nd, etc. may be used only for the purpose of distinguishing one component from another component. For example, a first component may be referred to as a second component without departing from the scope of the present invention, and the second component may also be referred to as a first component.

As shown in FIGS. 2 to 4 , the main components constituting the temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention include a measurement module 100 and an HMI module 200 .

The measurement module 100 includes at least two or more bus bars 121, and one side of the bus bar 121 in the longitudinal direction applies a current to a load or a circuit breaker 3 for blocking power supply when a short circuit, short circuit, or overload occurs. ) can be connected to the secondary terminal by screwing or bolting, and the other end can be connected to the load by screwing or bolting.

That is, the measurement module 100 is a component of the system, and some parts are separated into independent parts to perform one comprehensive measurement function and operation, and between the circuit breaker 3 for wiring and the load or each part is electrically connected to the branch circuit in the distribution board. may be installed inside and outside an electrical equipment such as a distribution board in a state of being connected to each other, and in particular, the bus bar 121 may be separately provided for each R phase, S phase, and T phase.

As shown in FIG. 3 , the measurement module 100 includes a first temperature sensor unit 111 , a second temperature sensor unit 112 , a third temperature sensor unit 113 , a temperature control unit 114 , and an LED temperature lamp. It includes a unit 115 , a communication unit 116 , a voltage sensor unit 117 , a voltage control unit 118 , and an LED voltage lamp unit 119 .

The first temperature sensor unit 111 is in contact with the bus bar 121 to sense the temperature of each branch circuit connected to the secondary terminal of the circuit breaker 3 for wiring and convert it into a measurable signal.

In addition, the first temperature sensor unit 111 may transmit sensor ID information to the temperature control unit 114 .

The second temperature sensor unit 112 is provided inside the electric equipment to sense the internal temperature of the electric equipment such as a distribution board and convert it into a measurable signal.

In addition, the second temperature sensor unit 112 may transmit sensor ID information to the temperature control unit 114 .

The third temperature sensor unit 113 is provided outside the electric equipment to detect the external temperature of the electric equipment such as a distribution board and convert it into a measurable signal.

In addition, the third temperature sensor unit 113 may transmit sensor ID information to the temperature control unit 114 .

Here, the first to third temperature sensor units 111, 112, and 113 can measure a temperature in the range of -40 to 85°C by a digital temperature measurement method, and it is preferable to employ a measurement error of ±0.5°C. Do.

The temperature control unit 114 compares, calculates and corrects (compensates) the temperature information received from the first to third temperature sensor units 111, 112, and 113 with each set value, and outputs a control signal according to the calculated result. can do.

That is, the temperature control unit 114 integrates the information generated by the first to third temperature sensor units 111, 112, and 113 and loads it into the database, extracts the values from the database, compares them, and outputs them as control signals. And it can be transmitted to the outside through the communication unit 116.

In addition, the temperature control unit 114 specifies the normal range of the internal temperature of the electrical equipment detected by the second temperature sensor unit 112 as a plurality of predetermined temperature sections, and increases by a constant temperature based on each upper limit for each temperature section. A temperature section having a temperature corresponding to the sensing temperature of the second temperature sensor unit 112 and a temperature corresponding to the sensing temperature of the first temperature sensor unit 111 are specified as a plurality of variable sections for displaying the emission color It is possible to control the luminous color of the LED temperature lamp unit 115 to vary or flicker according to the temperature for each variable section having .

For example, the internal temperature range of electrical equipment is set from 45°C to -5°C, and the temperature section is divided at 5°C intervals within the range, and the luminous color is increased by 10°C based on each upper limit for each temperature section. can be specified as a variable section displaying , and in this state, when the sensing temperature of the second temperature sensor unit 112 is 43°C and the sensing temperature of the first temperature sensor unit 111 is 46°C, the corresponding temperature The light emission color of the LED temperature lamp unit 115 can be varied or flickered according to the light emission color of the temperature section and the variable section having .

Here, the temperature control unit 114 stores the temperature information received from the first to third temperature sensor units 111, 112, and 113, respectively, and includes temperature information and ID for a plurality of predetermined temperature sections, necessary for performing the operation. A memory means may be provided to store a program, information, and temporary data, and a plurality of predetermined temperature information for each temperature section is input in the form of a lookup table by setting a normal range according to the internal temperature of the electrical equipment as a data value. It can also be configured so that the user can reset it by using a dip switch, an operation button, or the like.

The LED temperature lamp unit 115 may flash or change color according to the control signal of the temperature control unit 114 to emit light.

That is, the LED temperature lamp unit 115 may be turned on in a predetermined color or blink at a predetermined period according to the control of the temperature control unit 113 . For example, it is possible to adjust the blinking cycle such as off, low-speed blinking, high-speed blinking, etc., or to distinguish between normal and abnormal states by lighting multi-color LEDs to emit light.

The communication unit 116 may be connected to an interface protocol such as RS485 to communicate with an external device and transmit/receive signals through the HMI module 200 and the like through a communication cable.

And the communication unit 116 may include an RJ45 connector for connection of a communication line, a communication port, and the like.

The voltage sensor unit 117 may measure the current and voltage flowing through each bus bar 121 .

That is, the voltage sensor unit 117 is installed around each bus bar 121 connected to the secondary terminal of the circuit breaker 3 for detecting the current flowing in the branch circuit for each phase, and the detected phase current The analog signal is converted into a digital signal and provided to the voltage control unit 118 .

Here, the voltage sensor unit 117 may detect a current using a potential difference of a plurality of current transformers or induced electromotive force integrally included in the measurement module 100, but is not limited thereto. For example, a Hall sensor (device ) method, a fuse method, and a non-contact sensing method, various methods for detecting current can be applied.

The voltage control unit 118 may determine an abnormal state of the branch circuit and output a control signal according to the calculated result by comparing and calculating the voltage information received from the voltage sensor unit 117 with a predetermined set value.

Here, the voltage control unit 118 stores the voltage information input from the voltage sensor unit 117, and includes a memory means for storing ID, a program necessary for performing an operation, information and temporary data, and the like, and a dip switch, It can be configured such that a preset setting value can be reset by using an operation button or the like.

The LED voltage lamp unit 119 may emit light by changing the color according to the control signal of the voltage control unit 118 .

That is, the LED voltage lamp unit 119 may be lit in a predetermined color or blink at a predetermined period according to the control of the voltage control unit 118 . For example, light can be emitted by distinguishing between a normal state and an abnormal state by lighting a multi-color LED or adjusting a blinking cycle.

Here, the temperature control unit 114, the LED temperature lamp unit 115, the communication unit 116, the voltage sensor unit 117, the voltage control unit 118 and the LED voltage lamp unit 119 are one-chip microprocessors on the printed circuit board. It may be configured to be integrated and linked in a mounted form. In addition, it may include a control board that controls the device by transmitting an operation command to the device based on a received signal and performs each function.

Meanwhile, as shown in FIGS. 5 to 9 , the measurement module 100 includes a cradle 120 , a cartridge 130 , and a shield 140 .

The cradle 120 is made of an insulator and has a shape having an opposite surface facing the circuit breaker 3, and at least two bus bars 121 for connecting to the secondary terminal of the circuit breaker 3 are mounted. .

That is, one side of the bus bar 121 is partially protruded through the cradle 120 , and the other side is exposed to be connected to a load.

In addition, a docking part 122 for stable mounting and detachment of the cartridge 130 is formed above the bus bar 121 .

In addition, at least one coupling groove 123 for maintaining the attachment state of the cradle 120 and the cartridge 130 is formed in the rear part of the docking part 122 , and at least one stopper is formed on both sides of the front part of the docking part 122 . 126 is formed to protrude.

That is, the stopper 126 is integrally formed so as to be fitted in close contact with the stopper groove 136 of the cartridge 130 while being elastically deformed by elasticity when receiving an external force to maintain a locked state.

In addition, at least one fitting groove 125 for connecting to other measuring instruments with the shield 140 is formed on the opposite surface and the opposite surface of the cradle 120 facing the circuit breaker 3 for wiring.

Here, the bus bar 121 may be made of a conductive material having a constant thickness in order to supply a high voltage and a large current. For example, it may be formed in the form of a rectangular parallelepiped bar made of copper or aluminum.

The cartridge 130 is formed in a rectangular box-like shape so that it can be stably mounted on and detached from the docking unit 122 of the cradle 120, and a first temperature sensor unit 111 and a temperature control unit 114 inside. ), the LED temperature lamp unit 115, the communication unit 116, the voltage sensor unit 117, the voltage control unit 118 and the LED voltage lamp unit 119 are built-in and an isolation space for protection is formed.

In addition, at least two connection pins 131 that are elastically contacted by elastic deformation are mounted on the lower surface of the cartridge 130 to sense the temperature of the bus bar 121 .

In addition, in a position corresponding to the coupling groove 123 of the cradle 120 of the cartridge 130 in order to maintain the attachment state of the cradle 120 and the cartridge 130, the coupling protrusion ( 132 is formed, and a stopper groove 136 into which the stopper 126 is fitted is formed at a position corresponding to the stopper 126 of the cradle 120 of the cartridge 130 , that is, at both corners of the front part.

Here, the connection pin 131 is preferably formed of a metal material having low electrical conductivity, excellent insulation, and high heat transfer rate.

And the upper surface of the cartridge 130 is formed so that the light emitted from the LED light emitting chip of the LED temperature lamp unit 115 is visible.

In addition, a lens for diffusing the light emitted from the LED light emitting chip of the LED temperature lamp unit 115 is built inside the cartridge 130 .

Here, the lens induces diffusion of light with strong straightness irradiated from the LED light emitting chip through the action of refraction, reflection, and transmission, so that the light is condensed to the center, thereby minimizing the loss of the light source. By increasing efficiency and irradiation rate, it is possible to maximize discrimination and signal transmission for alarms in the event of an emergency condition.

In addition, at least one or more mounting slots 124 and 134 are vertically elongated on opposite surfaces facing the circuit breaker 3 of the cradle 120 and the cartridge 130 , respectively.

At least one shield 140 is selectively detachably formed in the mounting slots 124 , 134 or the fitting groove 125 for interphase insulation of the bus bar 121 and connection between products.

That is, the shield 140 is selectively inserted into the mounting groove 5 formed on the side wall of the secondary terminal of the circuit breaker 3 for wiring as shown in FIG. 4 to maintain the coupled state with the circuit breaker 3 for wiring while maintaining the bus bar (121) by separating between the functions and functions to insulate and shield.

In addition, the shield 140 is integrally formed with a connection part 141 for stable insertion and coupling in the mounting groove 5 formed on the sidewall of the secondary terminal of the circuit breaker 3 for wiring.

In addition, a grip portion 142 is formed on the upper portion of the shield 140 to facilitate gripping with a finger, and the lower portion is formed in a pointed shape that gradually narrows in width to facilitate insertion into the mounting groove 5 . .

Here, the shield 140 may be formed by injection molding an insulating synthetic resin into a shape having a predetermined area and insulating performance between phases or products.

On the other hand, a plurality of measurement modules 100 may be installed on the branch circuit with a unique identification number, and the point where the abnormality occurred can be more quickly identified through different identification numbers.

The HMI module 200 is installed in front of electrical equipment such as a distribution board, and is connected to several measurement modules 100 and communication and power supply through internal cables.

For example, the HMI module 200 collects measurement and status information of the measurement module 100 by performing serial communication such as RS485 with a plurality of measurement modules 100 and displays it through the front display unit 210, , converts it into a video signal for remote monitoring and performs TCP/IP communication with the upper network and Ethernet.

That is, the HMI module 200 collects measurement and status information of the measurement module 100, converts the information into a digital signal, displays it in real time through the display unit 210 on the front, and sends it to a server in the upper network. Temperature information and voltage information output from the temperature control unit 114 and the voltage control unit 118 may be transmitted.

In addition, the HMI module 200 may include a power supply device such as an SMPS to supply DC power required by the measurement module 100 .

Here, the display unit 210 of the HMI module 200 may be configured as a display device or panel for displaying various information such as LED, TFT color LCD, PDP, EL, TFT, and the like.

The temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention configured as described above detects the abnormal state of the branch circuit in real time, calculates and displays current and temperature information in the field, and at the same time, through the communication unit 116 By transmitting it to the outside, the administrator can monitor the sensed data and the current status from a remote location.

In addition, the occurrence of abnormal situations can be accurately identified and quickly dealt with by controlling the reference value to be appropriately varied according to the atmosphere, such as temperature changes in the surrounding electrical equipment such as distribution boards, automatically without notifying the danger in a predetermined manner in the same range at all times. have.

That is, when the temperature of the bus bar 121 is overloaded, a predetermined reference value is automatically changed according to the change in the ambient temperature to alert the LED temperature lamp unit 115 by lighting, flickering, image, etc., so that the influence of the ambient temperature It is possible to minimize the measurement error or the error of not accurately measuring the temperature overload caused by this.

In particular, the temperature control unit 114 compares the internal and external temperature information of the electrical equipment with a predetermined reference temperature and flexibly and appropriately corrects the temperature information according to the external temperature, and according to the calculated value, the LED temperature lamp unit 115 is in an off state or low speed. Because it flickers or flashes at high speed, it is possible to improve safety and operational reliability by accurately notifying the occurrence of abnormal situations in the field, such as when the temperature of the branch circuit rises above the preset reference value or when the overvoltage above the rated voltage rapidly flows.

In addition, when a failure or abnormality occurs in the measurement module 100, there is no need to forcibly cut off the electricity supply to the place of use, such as a factory or workshop, and only the cartridge 130 can be repaired or replaced by simply removing the corresponding cartridge 130 from the cradle 120. .

Therefore, maintenance can be performed while the machine is in operation, and maintenance can be improved, such as not causing any disruption to production.

Meanwhile, the control and processing process of the temperature controller 114 may be performed in the following order.

First, referring to FIG. 10 , the temperature control unit 114 sets a reference temperature Ts, which is a normal temperature value inside an electrical equipment such as a distribution panel (S101).

Here, the reference temperature (Ts) may be a value variably set within the range of 30 to 40 °C according to the season and the outside air.

Next, the temperature control unit 114 collects the temperature information Tb of the first temperature sensor unit 111 (S103).

Next, it is determined whether the temperature information Tb of the first temperature sensor unit 111 is equal to or less than a predetermined reference temperature Ts (S105).

As a result of the determination, if the temperature information (Tb) of the first temperature sensor unit 111 is less than or equal to the predetermined reference temperature (Ts), it is determined to be normal and the LED temperature lamp unit 115 is controlled to be maintained in an off state, Normal operation signal information is output to the HMI module 200 through the communication unit 116 (S107).

At this time, if the temperature information Tb of the first temperature sensor unit 111 is higher than the predetermined reference temperature Ts, the temperature information Tb of the first temperature sensor unit 111 is again the predetermined reference temperature Ts. ) or higher, it is determined whether it is higher than the predetermined reference temperature (Ts) within a temperature range of less than 5°C (S109).

As a result of the determination, if the temperature information (Tb) of the first temperature sensor unit 111 is higher than the predetermined reference temperature (Ts) and higher than the predetermined reference temperature (Ts) within a temperature range of less than 5°C, the temperature control unit 114 is Controlling the LED temperature lamp unit 115 to blink at a slow speed by judging the state of caution, and outputting caution signal information to the HMI module 200 through the communication unit 116 (S111).

At this time, if the temperature information Tb of the first temperature sensor unit 111 is out of a temperature range of less than 5°C than the predetermined reference temperature Ts, the temperature information Tb of the first temperature sensor unit 111 again ) is higher than a predetermined reference temperature by 5° C. or more (S113).

As a result of the determination, if the temperature information Tb of the first temperature sensor unit 111 is higher than the predetermined reference temperature by 5°C or more, the temperature control unit 114 determines that it is an abnormal state and turns on the LED temperature lamp unit 115 at a high speed. It controls to blink and outputs warning signal information to the HMI module 200 through the communication unit 116 (S115).

At this time, if the temperature information (Tb) of the first temperature sensor unit 111 is not higher than the predetermined reference temperature by 5°C or more, it returns to the previous step 'B' of step S103 and repeats the routine until the condition is satisfied ( Iterative routine) to get the result.

In addition, referring to FIG. 11 , the temperature control unit 114 collects the temperature information Ti of the second temperature sensor unit 112 and the temperature information Te of the third temperature sensor unit 113 after step S107 ( S121).

Next, it is determined whether the temperature information Te of the third temperature sensor unit 113 is equal to or greater than a predetermined allowable temperature (50° C.) (S123).

As a result of the determination, if the temperature information Te of the third temperature sensor unit 113 is equal to or higher than the predetermined allowable temperature (50° C.), the temperature control unit 114 determines that it is an error and the HMI module 200 through the communication unit 116. The error signal information is output to the ?

At this time, if the temperature information Te of the third temperature sensor unit 113 is less than a predetermined allowable temperature (50° C.), the temperature information Ti of the second temperature sensor unit 112 is again displayed in the third temperature sensor unit. It is determined whether the temperature information (Te) of (113) is higher within a temperature range of less than 5°C (S127).

As a result of the determination, when the temperature information Ti of the second temperature sensor unit 112 is higher than the temperature information Te of the third temperature sensor unit 113 within a temperature range of less than 5°C, the temperature control unit 114 returns to normal. It determines and outputs the normal operation signal information to the HMI module 200 through the communication unit 116 (S129).

For example, if the temperature information Ti of the second temperature sensor unit 112 is 34°C and the temperature information Te of the third temperature sensor unit 113 is 30°C, the temperature increase amount of the branch circuit in the electrical equipment is less than 5℃, which is within the limit, so it can be judged as a normal situation.

At this time, if the temperature information Ti of the second temperature sensor unit 112 is out of the temperature range of less than 5° C. than the temperature information Te of the third temperature sensor unit 113, the second temperature sensor unit ( 112), it is determined whether the temperature information Ti of the third temperature sensor unit 113 is higher than the temperature information Te of the third temperature sensor unit 113 within a range of 5 to 10°C (S131).

As a result of the determination, the temperature information Te of the third temperature sensor unit 113 is less than the predetermined allowable temperature (50° C.) and the temperature information Ti of the second temperature sensor unit 112 is the third temperature sensor unit 113 . ) higher than the temperature information (Te) within the range of 5 to 10 ° C., the temperature control unit 114 determines to be caution and outputs caution signal information to the HMI module 200 through the communication unit 116 (S133).

For example, if the temperature information Ti of the second temperature sensor unit 112 is 39°C and the temperature information Te of the third temperature sensor unit 113 is 30°C, the temperature increase amount of the branch circuit in the electrical equipment corresponds to the condition within the range of 5~10℃, so it can be judged as a cautionary situation.

At this time, if the temperature information Ti of the second temperature sensor unit 112 is out of the range of 5 to 10° C. than the temperature information Te of the third temperature sensor unit 113, the second temperature sensor unit 112 again ), it is determined whether the temperature information Ti of the third temperature sensor unit 113 is higher than the temperature information Te of the third temperature sensor unit 113 by more than 10°C (S135).

As a result of the determination, the temperature information Te of the third temperature sensor unit 113 is less than the predetermined allowable temperature (50° C.) and the temperature information Ti of the second temperature sensor unit 112 is the third temperature sensor unit 113 . ) is higher than the temperature information (Te) by more than 10°C, the temperature control unit 114 determines that it is an abnormal state and outputs warning signal information to the HMI module 200 through the communication unit 116 (S137).

For example, when the temperature information Ti of the second temperature sensor unit 112 is 41°C and the temperature information Te of the third temperature sensor unit 113 is 30°C, the temperature increase amount of the branch circuit in the electrical equipment is more than 10℃, so it can be judged as a warning situation.

At this time, if the temperature information Ti of the second temperature sensor unit 112 does not exceed 10° C. than the temperature information Te of the third temperature sensor unit 113, it goes to 'B', which is the previous step of step S103. It goes back and executes the iterative routine until the condition is met to get the result.

On the other hand, as shown in FIG. 12 , the temperature overload and overvoltage monitoring system for branch circuit protection according to an embodiment of the present invention can be used universally regardless of the product as needed, such as when additionally installed on the existing measuring instrument 4 . can

That is, even if a long protrusion is formed on the opposite surface of the existing instrument 4, when the shield 140 is separated from the cradle 120 and the cartridge 130, the protrusion is in the mounting slots 124 and 134. Since it can be inserted naturally, even different types of coupling structures can be used in common without mutual interference.

Here, when the existing measuring instrument 4 is formed of a split-type through-type, the bus bar 121 of the measuring module 100 may pass through the measuring instrument 4 to be connected to the secondary terminal of the circuit breaker 3 for wiring.

On the other hand, the present invention is not limited by the above-described embodiments and the accompanying drawings, and can be variously modified and applied in various ways that are not illustrated within the scope without departing from the technical spirit of the present invention. It is clear to those of ordinary skill in the art that the present invention can be widely applied by changing the substitution and other equivalent embodiments.

Therefore, the contents related to the modification and application of the technical features of the present invention should be interpreted as being included within the technical spirit and scope of the present invention.

100: measurement module 111: first temperature sensor unit
112: second temperature sensor unit 113: third temperature sensor unit
114: temperature control unit 115: LED temperature lamp unit
116: communication unit 117: voltage sensor unit
118: voltage control unit 119: LED voltage lamp unit
120: cradle 121: busbar (busbar)
122: docking unit 123: coupling groove
124: mounting slot 125: fitting groove
130: cartridge 131: connection pin
132: coupling projection 134: mounting slot
140: shield 141: connecting projection
200: HMI module

Claims (4)

A branch including a measurement module 100, an HMI module 200 that is connected to communication with the measurement module 100, displays measurement and status information of the measurement module 100, and converts it into a video signal for remote monitoring A thermal overload and overvoltage monitoring system for circuit protection, comprising:
The measurement module 100,
a first temperature sensor unit 111 that detects the temperature of the bus bar connected to the secondary terminal of the circuit breaker 3 for wiring installed in the electrical equipment and converts it into a measurable signal;
a second temperature sensor unit 112 for detecting the internal temperature of the electrical equipment and converting it into a measurable signal;
a third temperature sensor unit 113 for detecting the external temperature of the electrical equipment and converting it into a measurable signal;
a temperature control unit 114 for outputting a control signal according to a result calculated by comparing the temperature information received from the first to third temperature sensor units 111, 112, and 113 with each set value;
LED temperature lamp unit 115 flickering according to the control signal of the temperature control unit 114;
a communication unit 116 for communicating with an external device;
At least two bus bars 121 having opposite surfaces facing the circuit breaker 3, one part protruding to the outside in order to connect to the secondary terminal of the circuit breaker 3, and the other side being connected to a load ) is mounted, and the docking part 122 is formed above the bus bar 121, the cradle 120;
The first temperature sensor unit 111 and the LED temperature lamp unit 115 are built-in to protect and attach to and detachably from the docking unit 122 of the cradle 120, and the bus bar 121 on the lower surface. ) a cartridge 130 having at least two connection pins 131 that are elastically contacted by elastic deformation to sense the temperature of the;
at least one or more mounting slots 124 and 134 formed vertically on opposite surfaces of the cradle 120 and the cartridge 130 facing the circuit breaker 3, respectively; and
It is detachably formed in the mounting slots 124 and 134 and is selectively inserted into the mounting groove 5 formed on the sidewall of the secondary terminal of the circuit breaker 3 while maintaining the coupled state with the circuit breaker 3 at least one shield 140 for insulating and shielding by separating the bus bars 121;
includes,
At least one coupling groove 123 is formed in the rear portion of the docking unit 122 in order to maintain the attachment state of the cradle 120 and the cartridge 130 , and stoppers are provided on both sides of the front portion of the docking unit 122 . 126 is formed to protrude, and a coupling protrusion 132 fitted into the coupling groove 123 is formed at a position corresponding to the coupling recess 123 of the cartridge 130 , and the cartridge 130 is A temperature overload and overvoltage monitoring system for branch circuit protection, characterized in that a stopper groove (136) into which the stopper (126) is fitted is formed at a position corresponding to the stopper (126).
According to claim 1,
The measurement module 100,
a voltage sensor unit 117 for measuring the voltage of the bus bar 121;
a voltage control unit 118 for outputting a control signal according to a result calculated by comparing the voltage information received from the voltage sensor unit 117 with a set value; and
an LED voltage lamp unit 119 for emitting light by changing a color according to a control signal of the voltage control unit 118;
Temperature overload and overvoltage monitoring system for branch circuit protection further comprising a.
According to claim 1,
When the temperature information of the first temperature sensor unit 111 is below a predetermined reference temperature, the temperature control unit 114 determines that it is normal and maintains the LED temperature lamp unit 115 in an off state. Outputs normal operation signal information to the HMI module 200 through the communication unit 116,
When the temperature information of the first temperature sensor unit 111 is higher than the predetermined reference temperature within a temperature range of less than 5°C, the communication unit 116 while judging as an alert state and blinking the LED temperature lamp unit 115 at a slow speed ) to output caution signal information to the HMI module 200 through
When the temperature information of the first temperature sensor unit 111 is higher than the predetermined reference temperature by 5° C. or more, it is determined as an abnormal state and the LED temperature lamp unit 115 blinks at a high speed through the communication unit 116. A temperature overload and overvoltage monitoring system for branch circuit protection, characterized in that it outputs warning signal information to the HMI module 200 .
4. The method of claim 3,
The temperature control unit 114,
If the temperature information of the third temperature sensor unit 113 is higher than a predetermined allowable temperature (50° C.), it is determined as an error and the error signal information is output to the HMI module 200 through the communication unit 116,
When the temperature information of the third temperature sensor unit 113 is less than a predetermined allowable temperature (50° C.), the temperature information of the second temperature sensor unit 112 is higher than the temperature information of the third temperature sensor unit 113 by 5 If it is high within the temperature range of less than ℃, it is determined as normal and outputs normal operation signal information to the HMI module 200 through the communication unit 116,
When the temperature information of the third temperature sensor unit 113 is less than a predetermined allowable temperature (50° C.), the temperature information of the second temperature sensor unit 112 is higher than the temperature information of the third temperature sensor unit 113 by 5 If it is high within the range of ~10 ℃, it is judged as caution and outputs caution signal information to the HMI module 200 through the communication unit 116,
When the temperature information of the third temperature sensor unit 113 is less than a predetermined allowable temperature (50° C.), the temperature information of the second temperature sensor unit 112 is higher than the temperature information of the third temperature sensor unit 113 by 10 Temperature overload and overvoltage monitoring system for branch circuit protection, characterized in that when it is higher than ℃, it is determined as an abnormal state and warning signal information is output to the HMI module 200 through the communication unit 116.

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