KR20100027254A - Communication system for a surge protector - Google Patents

Abstract

PURPOSE: A communications system is provided to check the state of a system through a network by cutting off a surge and monitoring that a surge power is inputted. CONSTITUTION: A surge protector(31) discharges a surge voltage inputted to each electronic device through an outer ground terminal. The surge protector outputs data about the surge voltage with a pre-stored identification number. A management/controller receives the identification number and state data outputted from the surge protector. The management/controller transmits a control signal so that the electronic device corresponding to the surge protector is protected. The management/controller saves and updates an event for the surge voltage. An internet network is constructed between the surge protector and the management/controller and transfers data to a bidirectional direction.

Description

COMMUNICATION SYSTEM FOR A SURGE PROTECTOR

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system for a surge protector, and more particularly, to a communication system for a surge protector capable of interrupting a surge in order to supply high-quality power and monitoring an unmanned system online to input surge power.

In general, surge is a transient waveform of current, voltage or power that is transmitted along a wire or electrical circuit and has a characteristic of rapid increase and slow decrease in a short time, and on a lightning strike, electricity is cut off and the phone is unstable or sensitive. It is the main cause of semiconductor destruction.

Sudden overvoltages on power lines, especially strong or long surges, can disrupt insulation or interfere with electronic devices, so install surge protectors or surge suppressors between electronic devices such as power and computer terminals to suppress or minimize current changes. Should be.

SPD (Surge Protect Device) is a device that protects various equipment from surges and attenuates excessive voltage and noise, and is connected to power lines and control lines connected to power lines, telephone lines, data networks, CCTV circuits, cable TV circuits, and electronic equipment. It is designed to attenuate the transient voltages of very short moments.

In addition, as the wide area information communication room is established, the dependence on information technology using electronic data as a medium is increasing, and electronic data processing systems or measurement control systems are becoming essential elements in all fields of modern society.

In particular, the industrial economy is rapidly changing to a computer-based system, and a large portion of accidents occurring in high-speed information and communication facilities including computers are caused by surge voltage.

In addition, if the information system is temporarily stopped due to a surge voltage or causes a failure, the ripple effect is wide and the economic loss is enormous. Therefore, measures to reduce the surge accident rate to maintain and repair the system are a social concern. It came up with.

In recent years, the integration of electronic equipment is progressing, the resistance to surge voltage is gradually weakened, and the breakdown rate of equipment by the surge voltage is increasing with the increase of sensitive electronic equipment.

Here, since all circuits are driven only at the rated voltage, voltages exceeding the allowable range of the specified rated voltage become surge voltages, which cause damage to the electronic circuits and components in the electronic circuits, and the range of such breakdowns. Depends on the insulation strength of the component and the energy conversion performance of the circuit in question.

1 is a diagram illustrating an inflow path of a general surge voltage. Referring to FIG. 1, for example, in an AC 230V relay operating circuit, a surge voltage of 500V may occur while an inductive load is opened or shorted, but such surge voltage does not reach 2.5 times the rated voltage, but only a few (ms). It disappears within seconds, and does not cause damage to the circuit itself.

However, in direct current 5V circuits connected to integrated circuits, the same surge voltage can act as 100 times the circuit's rated voltage and cause breakage, and the insulation strength of the integrated circuit is tens of times lower than the relay, which can damage the circuit itself.

Here, the surge voltage may be generated by the opening and closing operation of the power device or the coupling based on the lightning discharge, and may also be caused by the inductive or capacitive coupling with other elements. In electronic equipment, these surge voltages are known as transient anomalies.

The rise time of these surge voltages is extremely fast in a few [ms], and after reaching a peak, it is relatively reduced over tens to hundreds of [ms]. To prevent damage to sensitive electronic equipment by these surge voltages, conductors with surge voltages must be quickly shorted to the equipotential connection ground.

On the other hand, semiconductors represented by ICs and LSIs embedded in these electrical and electronic devices are extremely resistant to transient surge voltages such as voltage impulses and voltage spikes generated during lightning, lightning, electric heavy equipment startup, or main power switch operation. It is sensitive and has the problem of malfunction or destruction of equipment.

In addition, this problem is more prominent due to the combination of systems and functions of electrical and electronic devices, or the combination of devices, and the reliability of the advanced data processing of the multimedia device is very high. It is an important issue.

These problems due to the complex system and function of the electric and electronic devices or the combination of devices are gradually increasing, and also the failure of the device due to surge voltage is very important because the reliability requirements for the advanced data processing of the multimedia devices are very high. It is a problem.

In the era of the transition from vacuum tube equipment to semiconductor equipment, problems such as malfunction and breakdown failure have started to occur even with the same surge voltage as the conventional one due to the low voltage operation and low breakdown voltage of the semiconductor itself. Therefore, the countermeasure against surge voltage of the low voltage circuit corresponding to the high information age is urgently required.

The present invention has been made to solve the above problems, when the failure of the electronic device due to the surge voltage, and outputs the information about the surge voltage through the network so that the administrator can easily recognize the surge voltage, the surge voltage is It is an object of the present invention to provide a communication system for a surge protector capable of remotely measuring and monitoring whether or not it has been introduced.

In order to achieve the object described above, the present invention discharges through an external ground terminal when a surge voltage input to each electronic device is detected, outputs data on the surge voltage with a stored identification number, and absorbs the surge. An AC / DC converter for converting a power suppressed by surges into a DC power source, a comparison voltage unit converted by the AC / DC converter to generate a proportional voltage proportional to surge inflow when surge is introduced, wherein When a voltage input from the comparison voltage unit is compared with a reference voltage and the voltage input from the comparison voltage unit is higher than the reference voltage, a comparison unit for outputting an operation signal, each time the operation signal output from the comparison unit is input. A surge protector including a surge counter unit for counting an input frequency; A management / control unit which receives the identification number and the state data output to the surge protector, transmits a control signal to protect the electronic equipment corresponding to the surge protector, and stores and updates an event for the surge voltage; An internet network is established between the surge protector and the management / control unit to transfer data in both directions.

The surge protector may be switched to block a voltage applied to the electronic device when the surge voltage is input to the electronic device corresponding to the surge protector.

In addition, a predetermined number of times is stored in the surge counter unit, and when the counted number exceeds the predetermined number of times, an operation signal is output to an alarm device, and the operation signal is transmitted to a management / control unit through the Internet network. It features.

As described above, the present invention having the configuration as described above measures the surge voltage which may affect a wide area related to the system by using the insulation equipment, and outputs the data about the surge voltage to the administrator through the network. If it is applied to an unmanned base station, it is possible to check the status of the system through the network and restart the system even if no direct visit is made. The data can be acquired, so it can be used wherever an information communication network is established.

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

2 is a block diagram schematically illustrating a communication system for a surge protector according to the present invention, and FIG. 3 is a diagram illustrating an embodiment in which the surge protector of FIG. 2 is installed. As shown in FIGS. 2 and 3, the surge voltage measured in each surge protector is provided to be output to a management / control unit located at a long distance and a short distance through an internet network.

In this case, the surge protector is a device such as a surface discharge surge absorber, a gas-charged surge absorber, a varistor and a diode in a single or complex configuration according to the application method.

This is because each of these devices has different inherent characteristics such as surge absorption performance, response speed, surge suppression characteristics, and limit voltage accuracy.

In addition, although the surge voltage cannot be predicted, it is possible to predict whether the electronic equipment connected to the surge protector is sufficiently protected against external interference, and in the case of a failure of the electronic equipment system where it is difficult to find the cause of the failure, If it occurs repeatedly repeatedly at a certain time, a certain day of the week or a certain time of day, it can be judged as a clear signal that measures against external interference are required.

Therefore, the surge voltage is monitored in real time by the management / control unit, and the data output from the surge protector is transmitted through the Internet network, and the management / control unit is provided through identification numbers such as ID addresses of the surge protectors connected to the respective electronic devices. May identify the state data and control it.

<Example>

The surge protector of the present invention is provided to protect electronic equipment from overcurrent and surge voltage, and to maintain a constant voltage, and a plurality of surge protectors are connected by a microprocessor or the like such as a control unit (not shown), and the control unit controls the entire circuit. It is provided to protect and maintain a constant voltage, and outputs a data signal to the Internet to inform the administrator.

Each surge protector is provided with an identification number such as an ID address, and the like is provided to output whether the surge protector connected to any equipment has an overvoltage or surge voltage through the control unit and the Internet network.

The controller may further include a memory to store an event in which a surge voltage is input to each surge protector, and transmit the event to a manager located at a long distance and a short distance through an internet network.

At this time, when a surge voltage is applied to each surge protector, a line is connected to ground connected to electronic devices connected to each surge protector to ground to cut off the line. The voltage applied to the corresponding connected electronic equipment is cut off.

In addition, by converting the state information of each surge protector into a digital transmission signal through the control unit and the Internet network, it is possible to remotely transmit its position and state, and to make it possible to check and check the state of each surge protector even from a distance.

On the other hand, the remote administrator monitors the status data of the surge protector and controls to reconnect the input and output ports that were connected to ground for over-voltage blocking in the surge protector according to the status data of the surge protector. Signal can be transmitted through the Internet.

The remote administrator can cut off or authorize the power input to the surge protector and the electronic equipment connected to the surge protector identified by the same identification number as each ID address. Repair and inspection are possible even without

In addition, the Internet network is preferably provided to enable automatic diagnosis, control and surveillance monitoring in the disaster prevention room using the RS-485 two-way communication and computer network.

FIG. 4 is a circuit diagram of the surge protector of FIG. 3. As shown in FIG. 4, the surge protector according to the present invention includes a protection circuit 10 between hot (H), neutral (N), and ground (G) wires to which power is attracted. And an abnormality display circuit 20 indicating an abnormal state from an abnormal voltage generated when lightning and a surge flows from the protection circuit 10, and detects the number of times the surge flows from the voltage between the hot wire and the neutral wire. The monitoring circuit 30 to display is provided.

The protection circuit 10 includes a fuse (F1) installed in series between a hot wire and a neutral wire, a thermal sensing protector (P1), a varistor (VR 1) which is a surge absorbing element for absorbing surge, and a fuse installed in series between the hot wire and the ground wire. (F2), thermal sensing protector (P2), varistor (VR2), a surge absorbing element for absorbing surge, fuse (F3) installed in series between neutral and ground wire, thermal sensing protector (P3), surge to absorb surge It consists of the varistor VR3 which is an absorption element.

At this time, the fuses F1, F2, and F3 are for disconnection to limit the transient current when the varistors are short-circuited and the transient current flows, and the thermal sensing protectors P1, P2, and P3 are used. Is a kind of circuit breaker that temporarily shuts off while excessive heat is detected.

The abnormality display circuit 20 is a circuit in which LEDs for monitoring the presence or absence of abnormalities of the varistor VR1 and the varistor VR2 are provided. When the varistors operate normally, the LED is turned on, and when the varistors are short-circuited and the fuse is blown, no current flows in the varistors, so that the LEDs are turned off so that the varistors can be identified as normal.

In addition, the monitoring circuit 30 is installed in parallel with the single-phase power (H, N) output from the protection circuit 10, the single-phase power is introduced into the surge protection unit 31, the surge of the surge by the protection circuit (10) The peak value of the power supply whose peak value is suppressed is attenuated again to protect the circuits connected to the rear end, and an abnormality display portion 41 indicating the normal operation state of the surge protection part 31 is provided.

The output voltage of the surge protection part 31 is converted into a direct current by the AC / DC converter 32, and the output of the AC / DC converter 32 is the comparator 37 and the surge by the DC / DC converter 33. It is converted into a predetermined DC voltage for stably supplying various driving voltages of various circuit components including the counter unit 38.

In addition, the DC voltage converted by the AC / DC converter 32 is input to the comparison voltage unit 35 to output a proportional voltage proportional to the input voltage and input the result to the comparison unit 37. When the voltage of the comparison voltage unit 35 is large by comparing the reference voltage applied from the reference voltage unit 36 with the comparison voltage input from the comparison voltage unit 35, the comparison unit 37 supplies the surge counter unit 38 with the reference voltage. The operation signal is output so that up counting is performed, and while the operation signal is outputted, an output signal is sent to the surge inflow display to indicate the surge inflow.

In addition, the surge inflow limit number of the varistors VR1, VR2, and VR3 is set in the surge counter 38, and when the number of times that has passed this number is reached, an output signal is output to the replacement warning unit 40. To issue a warning.

As a warning method, various methods using sound and light may be devised. In addition, the output from the comparator 37 allows the manager to recognize the inflow state of the surge by sound so that the manager can recognize when the surge introduced into the surge warning unit 42 is prolonged.

5 is a circuit diagram illustrating an example of an abnormal display circuit according to the present invention. The abnormality display circuit may be configured in a form, and the example shown in FIG. 5 may be configured by applying the same or slight modification to each varistor.

The reverse current prevention diode D1, the current limiting resistor R, and the abnormality display light emitting diode D2 are formed between the neutral line from the connection point of the fuse F1 and the thermal sensing protector P1. If the fuse is not disconnected and maintains its normal state, the light emitting diode D2 remains lit, but if the varistor VR1 is short-circuited and the fuse is blown, the light emitting diode D2 turns off, so there is no abnormality. Able to know.

6 is a circuit diagram for explaining an embodiment of the monitoring circuit of the present invention. As shown in FIG. 6, a surge protection part 31 including a resistor R31 and a varistor VR4 is installed between the hot wire H and the neutral wire N, and the state of the surge protection part 31 is provided. The abnormality display part 41 for showing is comprised from the diode D31, the resistor R32, and the light emitting diode D32.

Wiring and operation of the abnormality display portion 41 are made similar to those described in FIG. 5. The voltage whose surge is suppressed by the surge protection part 31 is input to the bridge diode BD, which is the AC / DC converter 32, through a filter composed of the capacitor C1 and the inductor L1 and is converted into direct current.

A voltage proportional to the DC power supply voltage output from the bridge diode BD is generated by the comparison voltage unit 35 and input to the non-inverting terminal of the comparison unit 37. The comparison voltage unit 35 emits light in which the amount of light is proportional to the voltage applied to the divided resistors R33 and R34 and the resistor R34 connected between the power line and the ground line of the bridge diode BD. The resistor D41 is configured to convert the amount of current flowing through the light receiving transistor Q2 and the light receiving transistor Q2 into a voltage in which the resistance value is changed in proportion to the amount of light of the diode D33 and the light emitting diode D33. The voltage applied to R41 is input to the non-inverting terminal of the comparator 37.

In addition, the output power of the DC / DC converter 33 is applied to the collector of the light receiving transistor Q2, and is applied to the zener diode ZD1 through the resistor R40 forming the reference voltage unit 31. The voltage applied to the diode ZD1 is applied to the inverting terminal of the comparator 37 as a reference voltage.

A surge counter 38, a surge inflow display 39, and a surge warning 42 are connected to the output of the comparator 37, and the surge counter 38 is a rising edge of the output waveform of the comparator 37. The count number can be displayed by a normal counter up counted by a rising edge signal, and the set number of counts is stored internally to warn the replacement warning unit 40 at a count exceeding the set number. Output the signal.

The surge warning unit 42 is a transistor RY1 operated by a voltage applied to the transistor Q3 operated by the output signal of the comparator 37 and the resistor R42 connected to the emitter of the transistor Q3. And an alarm device SP operated by the relay RY1.

In addition, instead of the alarm device, the contact point of the relay RY1 may be configured to be connected to an external communication network to inform the surge input fact to the outside.

In addition, the surge inflow display unit 39 includes a current limiting resistor R44 and a light emitting diode D41 connected to the output terminal of the comparator 37 so that the light emitting diode D41 emits light when the output terminal is a high signal. Display.

In addition, the output of the bridge diode BD outputs a plurality of constant DC voltages by a DC / DC converter 33 controlled by a switching mode power supply IC (SMPS IC), thereby comparing the comparator 37 and the surge counter. Since the driving power is supplied to the unit 38 and the surge inflow display unit 39, the elements are stably operated even when a surge is introduced.

N1 coils are wound on the primary side of the transformer of the DC / DC converter 33, and N2, N3, and N4 coils are wound on the secondary side, and the N1 coils are SMPS ICs and devices R35, C3, An oscillation is generated by D34 and C4, and an alternating current voltage is generated at the coil end by the winding ratios of the N2, N3, and N4 coils, and rectified by direct current by a capacitor and a diode connected to the coil end.

At this time, N2 and N3 are the windings for the output power, N4 is the feedback winding, and the light emitting diode D39 connected to N4 is proportional to the amount of light emitted in proportion to the current flowing through N4, and the light of the light emitting diode D39 is SMPS. It is input to the light-receiving transistor Q1 of the IC to change the amount of current flowing in the light-receiving transistor, thereby reducing the output voltage of N1 when an overcurrent flows and increasing the output voltage when a low current flows. Detailed description of the operation of the SMPS IC will be omitted as well-known technology.

FIG. 7 is a circuit diagram of the surge protector of FIG. 3. As shown in Fig. 7, the surge protector is provided to measure through insulation for the surge measurement, in this embodiment using the AD215.

If an overvoltage is input, an uncommitted input amplifier (UNCOMMITTED INPUT OP AMP) is required in order to prevent damage to the component. Accordingly, the input signal is connected to a modulator, a transformer (T1), and a demodulator (DDMODULATOR). It is digitized via a low pass filter (LPF) to reduce noise and distortion, store the output signal in a buffer (OUT BUFFER), and the signal that was in the buffer whenever an interrupt to signal externally occurred. Is output through the Internet.

ISOLATED DC SUPPLY and POWER OSCILLATOR are used to drive these surge protectors.

8 is a diagram illustrating an Ethernet controller applied to a communication system for a surge protector according to the present invention. As illustrated in FIG. 8, data on the surge voltage input to the surge protector may be connected through an internet communication method, and the power of various equipment may be bundled together to be remotely controlled.

That is, when a surge voltage is input to one region or one household, it is possible to control to each address. However, it is possible to easily cope with a problem such as a failure by disconnecting the power line inputted to one household or one region from the center.

Here, as a method for controlling the device by communicating with a corresponding surge protector remotely connected to the electronic device, it may be connected to the network through the 10 Bast-T Ethernet interface.

It has been developed to communicate 16 digital inputs and outputs, and administrators can monitor and monitor surge surges on a web basis anywhere in the operating system, such as Explorer or Netscape, where the Internet can be accessed through a standard web browser. It takes control.

9 is a diagram illustrating a web server for controlling a surge protector according to the present invention. As shown in FIG. 6, an administrator in an Ethernet-bound network may instruct an I / O contact to be controlled and receive an I / O contact status response.

The communication system can be used to check and control the status of the surge protector online at a remote location through the Ethernet network. Since data are sent and received in both directions, there is no need for an administrator to move to a remote location. Measurements, event storage for surge voltages, etc. can be performed.

In addition, high-quality power can be supplied by inputting an input surge voltage, and in case of an unmanned base station, a few administrators can monitor and control a plurality of surge protectors through a network.

Accordingly, the communication system for a surge protector according to the present invention can integrate a remote site using Ethernet, and can simultaneously store inflow time information for current type and voltage type surges, and insulate type current driving in addition to the surge and noise filter. Equipped with a sensor and a voltage-driven sensor for noise analysis, the microprocessor control unit can detect eight surge protectors at the same time by detecting in a single byte format.

In the above described exemplary embodiments of the present invention by way of example, the scope of the present invention is not limited only to this specific embodiment and those skilled in the art within the scope described in the claims of the present invention Changes may be made as appropriate.

1 is a diagram illustrating an inflow path of a general surge voltage.

2 is a block diagram schematically showing a communication system for a surge protector according to the present invention;

3 illustrates an embodiment in which the surge protector of FIG. 2 is installed.

4 is a circuit diagram implementing the surge protector of FIG.

5 is a circuit diagram for explaining an embodiment of an abnormal display circuit according to the present invention;

6 is a circuit diagram for explaining an embodiment of the monitoring circuit of the present invention.

FIG. 7 is a circuit diagram implementing the surge protector of FIG. 3. FIG.

8 illustrates an Ethernet controller applied to a communication system for a surge protector according to the present invention.

9 illustrates a web server for surge protector control in accordance with the present invention.

Claims (2)

When a surge voltage input to each electronic device is sensed, it is discharged through an external ground terminal, the data on the surge voltage is output together with a stored identification number, and a power supply whose surge is suppressed by the surge absorption elements is DC. AC / DC converter converting to a power source, a comparison voltage unit converted by the AC / DC converter to generate a proportional voltage proportional to surge inflow when surge is introduced, and receiving a voltage from the comparison voltage unit to compare with a reference voltage And a surge protector including a comparator for outputting an operation signal when the voltage input from the comparator voltage is higher than the reference voltage, and a surge counter for counting an input frequency each time the operation signal output from the comparator is input. ; A management / control unit which receives the identification number and the state data output to the surge protector, transmits a control signal to protect the electronic equipment corresponding to the surge protector, and stores and updates an event for the surge voltage; Internet network built between the surge protector and the management / control unit to transfer data in both directions Including; And the surge protector is switched to block a voltage applied to the electronic equipment when the surge voltage is input to the electronic equipment corresponding to the surge protector. Communication system for a surge protector comprising a. The method according to claim 1, The surge counter unit stores a predetermined number of times, and outputs an operation signal to an alarm device when the counted number exceeds the predetermined number of times, and the operation signal is transmitted to a management / control unit through the Internet network. Communication system for a surge protector provided with a counting means.

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