KR100885632B1 - Intelligent Surge Protective Devide - Google Patents

Abstract

The present invention is a failure or risk factors of electrical, electronic and communication equipment due to indirect lightning flows indirectly from inside and outside the building and induced lightning surges from adjacent power lines, communication lines, and grounding systems caused by lightning strikes in building structures. SPD is installed to prevent the occurrence of, a protection device for blocking the induction and indirect lightning surge caused by lightning strikes, and processing a large surge current, and the protection device is generated while absorbing or bypassing the surge energy An intelligent management module for collecting and calculating brain protection information and transmitting the brain protection information to an external monitoring unit where a manager is located, and forcibly separating the SPD from an external power system unit having direct power or alternating current when the protection device deteriorates. Controlled by the intelligent management module to block the spread of dangerous conditions to external systems The high speed disconnection unit and the over-temperature detection disconnection unit to sense the temperature by opening and closing itself, and the charging unit for supplying power for the operation of the circuit for the remaining time before the SPD maintenance will be.

SPD, brain protection management, brain protection measurement, monitoring

Description

Intelligent Surge Protective Devide

The present invention has the basic function to block or discharge the transient harmful electromagnetic waves of lightning and surge conducted through the power line or communication line to ensure the safety of electricity, communication facilities and people, and also to intelligent speedy It is characterized by a built-in intelligent management module for transmitting data to the disconnection unit and external monitoring unit to remove fire and electrical hazards caused by the deterioration of the large-capacity brain protection device to be applied to and to manage the operation history.

In general, most of the user-side design planners for internal brain protection measures such as SPD still do not have specialized application knowledge. Bonding mechanisms for internal brain protection, including SPD, applied until now, have been maintained and repaired in a primitive way, and have had a lot of safety risks. For this reason, it is necessary to apply advanced intelligent speedy and effective maintenance system suitable for the status of the domestic IT market and standardize it and lead the distorted domestic technology and related markets.

In addition, these external and internal brain protection devices are poorly managed because they are difficult to manage after installation, and they are almost impossible to determine the degree of aging and performance in appearance, and attempts to develop technologies for integrated management and operation between these devices. It is also absent.

In addition, the conventional SPD adopts a non-linear overvoltage suppression device, that is, a large-capacity surge protection device having a repetitive resistance of impulse surge current of 10 kA or more having a rise time of 8 kΩ and a wave length of 20 kΩ, and thus protects the electrical and electronic equipment or It has been common practice to install them in parallel in a power system with fuses or breakers having a power rating inserted in series in the circuit. However, when the large-capacity protection device deteriorates, overcurrent with a value less than the short-circuit current detection of a fuse or a breaker installed on the power supply side continuously flows through the protection device, resulting in a long-term thermal runaway phenomenon, which is another risk to the external power system. Induced. In order to compensate for this, the conventional SPD has a large-capacity protection device with a surge current of 10 kA or more and a power in addition to the fuse or the circuit breaker inserted in series in the power supply system corresponding to the rated current to be protected. In some cases, a method in which a fuse or a component having a current capacity and an opening characteristic with respect to frequency is combined in series and installed in parallel in a power system has been used. This also failed to maintain sufficient speedy performance due to the fuse opening below the surge current resistance of the protection device. A component of a temperature fuse or a sensing circuit that senses an evolving leakage current or a rise in temperature during a slow deterioration of the protection element and separates the SPD from the power source has been employed in series with the protection element. In case of rapid deterioration of the protection device, thermal runaway phenomenon persisted due to the permanent fuse open failure due to the slow operation time of the thermal fuse. The simultaneous application of an overcurrent fuse with a surge current rating of less than 10kA and an appropriately calculated thermal fuse was partially successful, reducing thermal runaway, but it was also impossible to design a large-capacity speedy SP above 10kA. As such, the design of the fuse and disconnect device corresponding to the rapid deterioration and the slow deterioration accompanying the deterioration of the protection element inside the SPD has to be abandoned and designed with the opposite goals of securing safety and designing a large-speed SPD. There was a problem.

The present invention has been made to solve the above problems, intelligent brain protection facility management system incorporating IT technology in order to effectively operate and maintain a variety of brain protection facilities diversified with a small number of personnel and minimum cost In addition to SPD's original protection function when necessary, it provides an intelligent function of acquiring and transmitting various surge data by separately providing high-sensitivity surge current and voltage measurement sensors, and predicting or preventing a dangerous state in case of deterioration that has been previously exposed. The purpose of the present invention is to implement an intelligent speedy integrated circuit (AC) overvoltage detection circuit and a thermal runaway prevention circuit in which a high speed disconnection unit is interlocked.

As a means to solve the above objectives, electrical, electronic, and telecommunications are caused by indirect lightning flows indirectly into the interior and exterior of buildings and lightning surges from adjacent power lines, communication lines, and ground systems caused by lightning strikes in building structures. SPD is installed to prevent the failure or danger of the device.

A protection element 37 for blocking induction and indirect lightning surges caused by lightning and processing a large surge current;

Intelligent management for collecting and calculating brain protection information generated by absorbing or bypassing surge energy by the protection device 37 and transmitting the brain protection information to an external monitoring unit 41 where an administrator is located. Module 21;

In order to prevent the dangerous state from spreading to the external system by forcibly separating the SPD 20 from the external power system 50 when the protection device 37 is deteriorated, the intelligent management module 21 is connected to the intelligent management module 21. A high speed disconnection unit 35 controlled by the overheat detection disconnection unit 36 which senses a temperature by itself and controls the opening and closing;

And a charging unit 38 for supplying power for the operation of the circuit for the remaining time before the SPD 20 maintenance.

The present invention improves the management function for the SPD, the core of the brain protection system on the outside and inside of the building, which was not effectively operated by the existing brain protection system management system, can effectively protect the equipment to be protected, and the vast facilities It is effective to provide a system capable of maintaining a whole internal brain protection system composed of a large number of intelligent SPDs distributed in a real time with a small number of personnel and a minimum cost.

In addition, in the improvement circuit for the possibility of thermal runaway caused by the rapid deterioration of the conventional internal speedy element and the possibility of secondary electrical shock or fire to the power supply system, that is, high-speed operation according to the over-voltage detection and leakage current detection By applying disconnection unit, it is effective to provide an advanced design to have detection capability and handling capability for self failure.

 As a practical example of the above, in post-management after a lightning accident, it is possible to carry out intensive measures in a weak section based on various collected information and data, resulting in a chronic repetitive damage situation and a lack of response immediately after an accident. Intelligent high-speed detection of rapid deterioration in addition to the detection of a slow deterioration state of a large-capacity protection device inside an intelligent speedy integrated or in contact with a power plant By applying the circuit breaker and recovery circuit, it is possible to predict and maintain the risk of the second electric shock or the fire that can occur. Will be. Real-time monitoring of inspection items, such as surge data generated from outside or inside, magnitude of surge voltage and current, frequency and frequency of recovery, path, etc. It can bring about savings in time and manpower operation costs.

The present invention is a failure or risk factors of electrical, electronic and communication equipment due to indirect lightning flows indirectly from inside and outside the building and induced lightning surges from adjacent power lines, communication lines, and grounding systems caused by lightning strikes in building structures. As speedy to install to prevent it from happening,

A protection element 37 for blocking induction and indirect lightning surges caused by lightning and processing a large surge current;

Intelligent management for collecting and calculating brain protection information generated by absorbing or bypassing surge energy by the protection device 37 and transmitting the brain protection information to an external monitoring unit 41 where an administrator is located. Module 21;

When the protection element 37 is deteriorated, the SPD 20 is connected to an external power supply system 50 including commercial power 33, power supply wiring 44, electricity, and communication equipment 42 of direct current or alternating current. In order to prevent the dangerous state from spreading to the external system by forcibly separating from the high-speed disconnection unit 35 controlled by the intelligent management module 21 and the overheat detection disconnection unit which senses and controls the temperature by itself. 36);

And a charging unit 38 for supplying power for the operation of the circuit for the remaining time before the SPD 20 maintenance.

In addition, the intelligent management module 21 is the deterioration determination of the protection element 37, the data collection and control unit 25 to detect the magnitude of the surge current or the leakage current required to determine the degradation of the protection element. The current measurement sensor 31, a voltage measurement sensor 32 for detecting a surge voltage and a direct current or alternating current overvoltage, and a frequency calculation function and data acquired by the current and voltage sensors 31 and 32 to calculate the speed A data collection and control unit (25) including a microprocessor for controlling the high-speed disconnection unit (35) inside the power supply side;

A remote transmission unit 27 for receiving the brain protection information and collecting the operation state with the transmission medium 40 to remotely transmit the brain protection state information;

A remote contact (27 ') which forms a passive terminal for detecting the state of the SPD by the remote terminal and an external active detection device;

And a display unit 30 for outputting and displaying data generated by the speedy 20 function and operation, and outputting data calculated by the data collection and control unit 25.

In addition, the high speed disconnection unit 35 detects the overvoltage at high speed through the voltage measuring sensor 32 of the intelligent management module 21, and is controlled to be opened and closed by a microprocessor inside the intelligent management module 21. After the overvoltage is extinguished, it has a closing function to a normal system voltage, so that the protection function can be restored and has a faster operating speed than the circuit breaker. The current measuring sensor 31 is provided to the high speed disconnecting unit 35 when an overvoltage occurs. After the external power source and the SPD 20 are separated by the voltage measuring sensor 32, the leakage level of the protection element 37 is sensed by the voltage measuring sensor 32 when the normal voltage is input to the recovery function according to the overvoltage disappearance. It is characterized by.

Hereinafter, with reference to the accompanying drawings to describe the present invention in detail.

1 is an internal configuration diagram of the intelligent speedy.

As shown in FIG. 1, in normal operation, a voltage of direct current or alternating current is applied to the commercial power supply 33, and a current is supplied to the electrical and communication equipment 42 through the power supply wiring 44. When a lightning strike occurs or a failure occurs in the external system, a surge voltage and a current flow through the commercial power supply 33, the power supply wiring 44, and the earth 45, and proceed to the electricity and communication facility 42. do.

The SPD 20 connected to the SPD and the connection line 43 by the surge voltage and current is operated so that some surge energy is transmitted through the path of the connection line 43 of the SPD. Energy is absorbed and some surge energy is bypassed to the power supply wiring 44 and the ground 45 so as not to enter the electrical and communication equipment 42.

 Here, the SPD and the connection wiring 43 are means for connecting the SPD 20 and the external system, and may be connected to the SPD by wires supplied by a manager or an installer or integrated with the SPD. That is, the connection wiring is added when installed separately. The connector also provides only terminals.

According to the general operating speed of the SPD, if the surge voltage is detected through the protection element 37 connected through the high-speed disconnection unit 35 and the overheat detection fuse or disconnection unit 36, the internal impedance of the protection element 37 Is rapidly lowered, so that most of the surge current flows through the protection element 37, and the surge voltage applied to the electric and communication equipment 42 is lowered, and the surge current is almost inside the electric and communication equipment 42. It will not flow.

In the SPD 20 according to the present invention, the intelligent current measuring module 31 measures the surge current between both terminals of the protection element 37 or via the earth 45 in the process. This collection, counting, calculation, display by the display unit 30, and can be transmitted to be monitored by the external monitoring unit 41 through the remote transmission unit 27.

The intelligent management module 21 includes a data collection and control unit 25, a remote transmission unit 27, a remote contact 27 ′, and a display unit 30.

While displaying the operating state of the speedy 20, at the same time counting, collecting, and calculating various data, the operating state of the calculated data and speedy 20, collection information, deterioration state of the protection element, disconnection unit information remotely With the function to transmit to each of the circuits can be implemented independently or in a complex form of circuit according to the configuration and conditions of the function of the speedy 20, it is possible to share some circuits with each other have.

In the data collection and control section 25, a single or multiple current measurement capable of measuring an impulse current of 100 kA from a leakage current of 200 μA and a current having a frequency band of a 2 MHz frequency component from a frequency of a direct current component is possible. The sensor 31 is divided into a single or multiple voltage measurement sensor 32 capable of measuring an impulse voltage in the range of 1 mV to 100 kV and a voltage having a frequency band of a 2 MHz frequency component from a frequency of a DC component. The microprocessor calculates the frequency calculation function and the data acquired from the current and voltage sensors 31 and 32, that is, the number of occurrences of the surge current and the surge voltage, the magnitude, the frequency, the leakage of the path and the protection element, the degree of degradation, and the like. The power side high speed disconnection unit 35 inside the SPD20 is controlled.

The remote transmitter 27 includes a remote contact 27 ' The brain protection information is received and the operation state and the transmission medium 40 is collected and the brain protection state information is transmitted remotely. The data transmission method may be selected by one or more of wired, wireless, and optical transmission.

The current measurement sensor 31 of the intelligent speedy detects the low-frequency leakage current generated during the slow deterioration or rapid deterioration of the protection element 37 transmits a detection signal to the microprocessor inside the intelligent management module 21 and This allows the high speed disconnection unit 35 to be operated. However, the current sensing signal by the current measuring sensor 31 becomes a complementary function of the operation of the high speed disconnecting unit 35 by the voltage measuring sensor 32, and when an initial overvoltage occurs in the high speed disconnecting unit 35. After the circuit opening operation, the main function is to detect the degree of leakage of the protection element 37 when the circuit is closed by the recovery function according to the overvoltage disappearance.

The overheat detection disconnection unit 36 has been applied to an existing SPD alone or in cooperation with other overcurrent sensing fuses or the overheat detection disconnection unit 36, and has a large surge current capacity of 10 kA or more and degraded. The circuit is opened by detecting an excessive rise in temperature due to the slow deterioration detected from the protection element 37.

However, the overheat detection disconnection unit 36 has a slow temporal characteristic, and when applied alone without protection coordination with the high speed disconnection unit 35, permanent over-opening due to overcurrent inrush due to the rapid deterioration of the protection element 37. It leads to a failure condition, which leads to continuous thermal runaway.

The high speed disconnect unit 35 controlled by the intelligent management module 21 is not suitable for the SPD design having a surge current capacity of a large amount of the fuse that operates by opening the current by detecting the overcurrent applied to the SPD. The overheat detection disconnection unit 36 suitable for the SPD20 design having a large surge current capacity without being subject to a design restriction on current or overcurrent of the system, and detecting a slow deterioration of the protection element 37. ) And the protection coordination to have a function to detect the DC or AC overvoltage of the system that is the main cause of rapid deterioration at high speed to separate the SPD 20 from the system.

Due to the failure or deterioration of the SPD20, the circuit breaker of the system for supplying power to the load such as the electric and communication facilities 42 detects a DC or AC overcurrent to prevent the power supply 39 from being interrupted. In order to operate the high speed disconnection unit 35 operated by the voltage measuring sensor 32 of the intelligent management module 21 applied to the intelligent speedy circuit, a circuit breaker detects an overcurrent and excites a trip coil to provide a circuit. It has the characteristic of detecting, calculating and opening overvoltage faster than time to open.

The high speed disconnection unit 35 operated by the intelligent management module 21 is different from the existing overcurrent sensing fuse or the overheating sensing disconnection unit 36. After that, it has the function of closing to the system when the normal voltage is detected, so that the protection function can be restored. If the deterioration of the protection element 37 has already progressed at the time of restoring the protection function, it is detected by the current measurement sensor 31 and the high speed disconnection unit 35 is re-opened by the intelligent management module 21. .

Intelligent speedy is the overheat detection disconnection unit 36 for forcibly separating the speedy 20 from the power source when the protection element 37 deteriorates to prevent the dangerous state from spreading to the external system, and the high-speed disconnection Characterized in that it is composed of a combination of the part (35).

In the case of the SPD 20 separated from the external power supply unit 50 by the overheat detection disconnection unit 36 and the high speed disconnection unit 35, information transmitted from the intelligent management module 21 is externally displayed. In order to monitor in the monitoring unit 41, the power supply 39 is made in the charging unit 38 for supplying the power required for the operation of the circuit for the remaining time before the SPD 20 maintenance.

2 is an exemplary embodiment of a monitoring screen in an external monitoring unit 41 in connection with a monitoring control system of another system.

As described above, preferred embodiments according to the present invention have been described, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the scope of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical spirit of the present invention to the extent that various modifications can be made.

1 is a block diagram of an intelligent speedy according to the present invention.

Figure 2 is an embodiment of the monitoring screen in the external monitoring unit in conjunction with the monitoring control system of another system according to the present invention.

** Main Names of Drawings **

20: Speedy 21: Intelligent Management Module

37: protection device 50: external power system

35: high speed disconnection unit 36: overheat detection disconnection unit

38: live part

Claims (4)

Induced faults or hazards of electrical, electronic and communication equipment caused by indirect lightning flows indirectly from inside and outside of the building and induced lightning surges from adjacent power lines, communication lines, and grounding systems caused by lightning strikes in buildings. As a speedy to install to prevent, A protection element 37 for blocking induction and indirect lightning surges caused by lightning and processing a large surge current; Intelligent management for collecting and calculating brain protection information generated by absorbing or bypassing surge energy by the protection device 37 and transmitting the brain protection information to an external monitoring unit 41 where an administrator is located. Module 21; In order to prevent the dangerous state from spreading to the external system by forcibly separating the SPD 20 from the external power system 50 when the protection device 37 is deteriorated, the intelligent management module 21 is connected to the intelligent management module 21. A high speed disconnection unit 35 controlled by the overheat detection disconnection unit 36 which senses a temperature by itself and controls the opening and closing; Intelligent speedy, characterized in that consisting of; charging unit (38) for supplying the power for the operation of the circuit for the remaining time before the SPD20 maintenance. The method of claim 1, The intelligent management module 21 is a deterioration determination, counter data collection and control unit 25 of the protection element 37, and detects the magnitude of the surge current or the leakage current required to determine the degradation of the protection element 37. A current measurement sensor 31, a voltage measurement sensor 32 for detecting a surge voltage and a direct current or alternating current overvoltage, a frequency calculation function and data acquired by the current and voltage sensors 31 and 32, A data collection and control unit 25 including a microprocessor for controlling the high speed disconnection unit 35 on the power supply side inside the PD 20; A remote transmission unit 27 for receiving the brain protection information and collecting the operation state with the transmission medium 40 to remotely transmit the brain protection state information; A remote contact (27 ') which forms a passive terminal for detecting the state of the SPD by the remote terminal and an external active detection device; And a display unit 30 for outputting and displaying data generated by the speedy 20 function and operation, and outputting data calculated by the data collection and control unit 25. Espidi. The method of claim 1, The high speed disconnection unit 35 detects the overvoltage at high speed through the voltage measuring sensor 32 of the intelligent management module 21, and is controlled to be opened and closed by a microprocessor inside the intelligent management module 21. Intelligent SPD, which has the function of closing to the normal system voltage after extinction and recovering the protection function, and has a faster operating speed than the circuit breaker. The method of claim 2, The current measuring sensor 31 has a recovery function according to the overvoltage disappearance by the voltage measuring sensor 32 after the external power source and the SPD 20 are separated by the fast disconnecting unit 35 when an overvoltage occurs. Intelligent speedy, characterized in that for detecting the leakage of the protection element 37 when the normal voltage is input.

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