JP5339352B2 - Lightning protection device for uninterruptible power supply device of CATV system and uninterruptible power supply device including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightning protection device for an uninterruptible power supply device for a CATV system, and to provide an uninterruptible power supply device equipped with the lightning protection device. <P>SOLUTION: In the uninterruptible power supply device 100 for the CATV system, an interruptible power supply device body 110 includes an input side circuit 111 and an output side circuit 112, and the lightning protection device 120 includes input-side lightning arresting elements 121, 122 and an output-side lightning arresting element 123. The input-side lightning arresting elements 121, 122 have the one ends connected to the input side of the interruptible power supply device body 110, and the other ends connected to the ground terminal of the interruptible power supply device body 110, and are intended for releasing a surge current from a pair of input-side power supply lines connected to the ground. The output-side lightning arresting element 123 has the one end connected to the output side of the uninterruptible power supply device and the other end connected to the ground terminal of the uninterruptible power supply device, and is intended for releasing the surge current from the output side power supply line connected to the ground. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a lightning protection device for an uninterruptible power supply device that is a power supply for an outdoor CATV transmission device such as an amplifier of a CATV system, and an uninterruptible power supply device including the same.

  In various telephone communication lines, cable broadcasting lines, and the like, outdoor communication lines are connected to various devices, and these various devices are usually connected to a power line such as a commercial power source.

 In the above existing telephone communication line, a subscriber protector is installed at the boundary between the outdoor line and the subscriber line, and the application of high voltage is discharged to the ground by a lightning protection element to prevent harm to the human body and protect the equipment body It was something to do.

 On the other hand, most of the commercial power supplies are of a single-phase three-wire system with neutral grounding, and generally have a structure in which one line is grounded at the position of the pole transformer. The commercial power line is provided with an earth leakage breaker and a breaker. Further, in preparation for the invasion of abnormal voltage such as lightning surge, a power source lightning protection element is connected between the commercial power line and the ground (see Patent Document 1).

  In addition, as a wired broadcast line, a relay transmission network of a cable television (hereinafter referred to as CATV) system includes a large number of various amplifiers such as a trunk amplifier, a trunk distribution amplifier, a trunk branch amplifier, and a distribution amplifier installed outdoors. An uninterruptible power supply device (abbreviation: PS) is used as a power supply device for supplying power to these amplifiers.

  In the uninterruptible power supply apparatus, a commercial power supply (AC 100 V) is input to the apparatus, and converted into an amplifier power supply (for example, AC 60 V) by an internal circuit and output. In order to prevent the supply of power to the CATV system from being interrupted even if the commercial power supply fails, power is automatically supplied from the standby power supply (storage battery) to the CATV system when the commercial power supply is interrupted.

  The uninterruptible power supply apparatus is provided with a protection circuit against external surges such as induced lightning and load short-circuit accidents. FIG. 5 is a schematic diagram showing a configuration of a lightning countermeasure circuit of a conventional uninterruptible power supply apparatus. FIG. 5 shows a path of surge current intrusion due to lightning.

  As shown in FIG. 5, the uninterruptible power supply device 1 is provided with an input side circuit 120 and an output side circuit 130 in a metal casing 10. Moreover, as the lightning countermeasure circuit of the uninterruptible power supply 1, lightning protection devices 121 and 122 connected to the input side and a lightning protection device 131 connected to the output side are installed.

Japanese Utility Model Publication No. 7-3247

  However, in the circuit configuration as shown in FIG. 5, when a surge current enters the uninterruptible power supply device 1 during a lightning strike, the lightning protection elements 121 and 122 connected to the input side as shown in FIG. A path for bypassing the surge current can be formed by the lightning protection element 131 connected to the side. As a result, surge current can be prevented from entering the internal circuit of the uninterruptible power supply 1. However, since an element having an impedance component such as a filter F is mounted on the bypass path, the potential is increased due to the passage of the surge current. Will occur and increase the potential on the bypass path. That is, a high voltage is generated in the uninterruptible power supply 1.

  Further, since the metal casing 10 of the uninterruptible power supply 1 is made of metal and connected to the ground terminal, the entire metal casing 10 is grounded and mounted inside. Including the wiring connection part of the AC60V output transformer and other mounted parts, the metal casing (ground) 10 is insulated from the space. That is, it is an insulation separation structure between the metal housing 10 and the internal mounting circuits (120, 130). In addition, the dielectric breakdown at a spatial distance occurs in a state where a voltage of about 1 kV is applied to a spatial distance of 1 mm.

  When a high voltage is generated between the internal circuit and the ground due to the above two elements and the environment (high humidity) during a lightning strike, a spark phenomenon may occur. Due to the occurrence of the spark phenomenon, there is a possibility that a lightning surge intrusion path different from the bypass path by the lightning protection element is formed between the internal circuit and the ground, that is, the surge current flows to the metal part of the housing due to the spark phenomenon. there is a possibility. In this case, there is a problem that unnecessary operation of the circuit protector S occurs.

  Therefore, the present invention has been made in consideration of such problems, and includes a lightning protection device for an uninterruptible power supply device that is a power supply device for outdoor CATV transmission equipment such as an amplifier of a CATV system, and the like. An object is to provide an uninterruptible power supply device.

  In order to solve the above problems, a lightning protection device for an uninterruptible power supply of a CATV system according to the present invention provides a lightning protection for an uninterruptible power supply for supplying power to an amplifier connected to a communication line of the CATV system. A surge current from an input-side power line, one end of which is connected to the input side of the uninterruptible power supply and the other end is connected to a ground terminal of the uninterruptible power supply A pair of input-side lightning protection elements for escaping the power, and one output terminal connected to the output side of the uninterruptible power supply apparatus and the other end connected to the ground terminal of the uninterruptible power supply apparatus and grounded An output side lightning arrester for releasing surge current from the wire, forming a lightning surge bypass circuit between the input side and the output side of the uninterruptible power supply device, and the input side of the uninterruptible power supply device A lightning surge bypass circuit is formed between the ground and between the output side of the uninterruptible power supply device and the ground, and a lightning surge bypass circuit is formed between the coaxial lines on the output side of the uninterruptible power supply device. .

  For example, the input side lightning arrester and the output side lightning arrester are provided with contact terminals that are opened when a failure occurs and for confirming the presence or absence of the failure. Further, a lamp indicating a failure is connected to the contact terminal. Furthermore, a means is provided for determining whether the contact terminal has a failure and transmitting it to the CATV station.

  The uninterruptible power supply apparatus according to the present invention includes the lightning protection device for the uninterruptible power supply apparatus of the CATV system according to the present invention.

  According to the present invention, the lightning protection device for the uninterruptible power supply device of the CATV system generates a potential due to the passage of surge current and raises the potential on the bypass path, that is, the uninterruptible power supply device 1 has a high voltage. Can be avoided.

  Therefore, no spark phenomenon occurs, and by the occurrence of the spark phenomenon, it is possible to prevent the formation of a lightning surge intrusion route different from the bypass route by the lightning arrester between the internal circuit and the ground, and the circuit protector Generation of unnecessary operations can be prevented.

  As a result, the uninterruptible power supply device of the CATV system can be reliably protected from abnormal voltages such as lightning surges, and no unnecessary operation of the circuit protector of the uninterruptible power supply device occurs, and power is supplied stably. It becomes possible.

  Further, the lightning protection device for the uninterruptible power supply device of the CATV system can be easily installed on the uninterruptible power supply device of the ready-made CATV system.

It is the schematic which shows the installation state of the uninterruptible power supply apparatus of the CATV system of embodiment of this invention. It is the schematic which shows the structure of the uninterruptible power supply apparatus of the CATV system of embodiment of this invention. It is the schematic which shows the example of the circuit structure which monitors the state of the lightning protection apparatus by a display lamp. It is the schematic which shows the example of the circuit structure which monitors the state of a lightning protection apparatus with a status monitor. It is the schematic which shows the structure of the uninterruptible power supply apparatus of the conventional CATV system.

  A lightning protection device for an uninterruptible power supply device of a CATV system according to the present invention and the best mode for carrying out the uninterruptible power supply device using the same will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing an installation state of an uninterruptible power supply apparatus of a CATV system according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing the configuration of the uninterruptible power supply apparatus of the CATV system according to the embodiment of the present invention.

  As shown in FIG. 1, the uninterruptible power supply apparatus 100 of the CATV system is arranged on a communication line of the CATV system. The input side is connected to a commercial power supply (AC100V), and the output side is connected to an amplifier (amplifier) with a power supply coaxial cable to supply power as a power supply of AC60V. The output side is connected to an amplifier (amplifier) by a status coaxial cable.

  As shown in FIG. 2, the uninterruptible power supply device 100 of the CATV system includes a metal case 101, an uninterruptible power supply device main body 110, and a lightning protection device 140. The uninterruptible power supply main body 110 and the lightning protection device 140 are housed in a metal case 101.

  The uninterruptible power supply main body 110 includes an input side circuit 120 and an output side circuit 130. The input side circuit 120 is connected to a commercial power supply (AC100V). The output side circuit 130 outputs AC 60V power and supplies it to an amplifier. Further, the output side circuit 130 includes a filter F and a circuit protector S.

  The lightning protection device 140 includes an input side lightning protection circuit having input side lightning protection elements 141 and 142 and an output side lightning protection circuit having an output side lightning protection element 123. The input side lightning protection elements 141 and 142 have one end connected to the input side of the uninterruptible power supply main body 110 and the other end connected to the ground terminal of the uninterruptible power supply main body 110 and to a ground. This is for releasing surge current from the input side power supply line. The output side lightning protection element 143 has one end connected to the output side of the uninterruptible power supply device, the other end connected to the installation terminal of the uninterruptible power supply device, and a surge current from the output side power supply line grounded It is for letting go.

  In the lightning protection device 140, a lightning surge bypass circuit is formed between the input side and the output side of the uninterruptible power supply main body 110 by the input side lightning protection devices 141, 142 and the output side lightning protection device 143. A lightning surge bypass circuit is formed between the input side of the uninterruptible power supply main body 110 and the ground and between the output side of the uninterruptible power supply main body 110 and the ground, and the coaxial line on the output side of the uninterruptible power supply main body 110 is connected. A lightning surge bypass circuit is formed between them.

  Thereby, when a surge current enters the uninterruptible power supply apparatus 100 during a lightning strike, the surge current is bypassed by the lightning surge bypass circuit as shown by the arrow in FIG. In this case, there is no impedance component on the bypass circuit, and the voltage generated when a lightning surge is applied can be minimized.

  As described above, in the present embodiment, the uninterruptible power supply apparatus 100 of the CATV system includes the metal case 101, the uninterruptible power supply apparatus main body 110, and the lightning protection apparatus 140, and the uninterruptible power supply apparatus main body. 110 includes an input side circuit 120 and an output side circuit 130, and the lightning protection device 140 includes input side lightning protection elements 141 and 142 and an output side lightning protection element 143. The input side lightning protection elements 141 and 142 have one end connected to the input side of the uninterruptible power supply main body 110 and the other end connected to the ground terminal of the uninterruptible power supply main body 110 and to a ground. The output side lightning protection element 143 has one end connected to the output side of the uninterruptible power supply apparatus and the other end connected to the ground terminal of the uninterruptible power supply apparatus. This is for releasing a surge current from the output side power supply line which is connected and grounded.

  Thereby, in the uninterruptible power supply apparatus 100 of the CATV system, the lightning protection apparatus 140 generates a potential due to the passage of the surge current and raises the potential on the bypass path. Generation of voltage can be avoided. Therefore, no spark phenomenon occurs, and by the occurrence of the spark phenomenon, it is possible to prevent the formation of a lightning surge intrusion route different from the bypass route by the lightning arrester between the internal circuit and the ground, and the circuit protector Generation of unnecessary operations can be prevented.

Therefore, the uninterruptible power supply apparatus 100 of the CATV system is reliably protected from abnormal voltage such as lightning surge, and it becomes possible to supply power stably without causing unnecessary operation of the circuit protector.
In addition, the lightning protection device 140 can be easily installed in an uninterruptible power supply device of an off-the-shelf CATV system.

  3 and 4 are schematic diagrams showing another configuration of the uninterruptible power supply apparatus of the CATV system according to the embodiment of the present invention. As another embodiment of the present invention, for example, in the uninterruptible power supply apparatus 100 of the CATV system, a contact that becomes open (or shot) when an input-side lightning arrester circuit having input-side lightning arresters 141 and 142 fails. A terminal 144 is provided. Further, the output side lightning arrester circuit having the output side lightning arrester 143 is provided with a contact terminal 145 that is opened (or shot) when a failure occurs. Thereby, when the input side lightning protection elements 141 and 142 and the output side lightning protection element 143 break down, the contact terminal 144 or 145 is opened (or shot).

  In addition, a status display lamp 146 indicating a failure is provided. The status display lamp 146 is connected to the contact terminals 144 and 145, and the status display lamp 146 is turned on (or turned off), so that a circuit failure can be determined. Inspection of the uninterruptible power supply 100 of the CATV system grounded on the utility pole can be confirmed without climbing the utility pole.

  As described above, the contact terminals 144 and 145 can be used to check the states (presence or absence of failure) of the input-side lightning arresters 141 and 142 and the output-side lightning arrester 143. When a lightning arrester breaks down, the built-in contact terminal switches. Using this mechanism, the state of the lightning protection circuit is monitored.

  Further, for example, a communication means for determining whether or not there is a failure in the contact terminal and transmitting it to the CATV station may be provided. Here, the communication means is a wired communication means or a wireless communication means using a CATV system.

  FIG. 3 is a diagram illustrating an example of a circuit configuration for monitoring the state of the lightning protection device using the display lamp. 3A is a normally closed (NC contact circuit, that is, a circuit in which the status display lamp 146 is normally lit and extinguished when it is abnormal. FIG. 3B is normally open (NO). The contact circuit, that is, the state display lamp 146 is a circuit that is turned off when it is normal and is lighted when it is abnormal.

  Moreover, the power supply for the status display lamp 146 in FIG. 3 can use a commercial power source connected to the uninterruptible power supply device 100 or an AC 60V power source output from the uninterruptible power supply device 100. It is also possible to mount a battery, a solar cell, etc. and use it as a power supply for the status display lamp.

  FIG. 4 is a diagram showing an example of a circuit configuration for monitoring the state of the lightning protection device with the status monitor. FIG. 4A shows a normally closed (NC) contact circuit. FIG. 4B shows a normally open (NO) contact circuit. These contact circuits are connected to a status monitor. Thereby, the status of the lightning protection circuit unit can be monitored by the status monitor.

  The present invention can be used for lightning protection of an uninterruptible power supply that is a power supply for outdoor CATV transmission equipment such as an amplifier of a CATV system. Moreover, since the lightning protection device for the uninterruptible power supply device of the CATV system can be easily installed in the uninterruptible power supply device of the ready-made CATV system, the lightning protection function of the uninterruptible power supply device of the ready-made CATV system Can also be used to improve

DESCRIPTION OF SYMBOLS 1,100 CATV system uninterruptible power supply device 10,101 Metal case 110 Uninterruptible power supply main body 120 Input side circuit 121,122,131 Lightning protection element 130 Output side circuit 140 Lightning protection device 141, 142 Input side lightning protection element 143 Output side lightning protection device 144, 145 Contact terminal 146 Status indicator lamp

Claims (5)

A lightning protection device for an uninterruptible power supply for supplying power to an amplifier connected to a communication line of a CATV system,
The uninterruptible power supply device is composed of a metal case, an uninterruptible power supply device body provided with a circuit protector in an output side circuit, and a lightning protection device, and the uninterruptible power supply device body and the lightning protection device Is stored in the metal case,
The lightning protection device
A pair for releasing a surge current from an input power line connected to the ground while one end is connected to the input side of the uninterruptible power supply apparatus and the other end is connected to the ground terminal of the uninterruptible power supply apparatus Input side lightning protection element,
An output-side lightning arrester for releasing a surge current from an output-side power line that has one end connected to the output side of the uninterruptible power supply and the other end connected to the ground terminal of the uninterruptible power supply With elements,
A lightning surge bypass circuit is formed between the input side and the output side of the uninterruptible power supply device, and between the input side and the ground of the uninterruptible power supply device and between the output side and the ground of the uninterruptible power supply device A lightning protection device for an uninterruptible power supply of a CATV system, wherein a lightning surge bypass circuit is formed and a lightning surge bypass circuit is formed between coaxial lines on the output side of the uninterruptible power supply.   The uninterruptible power supply of the CATV system according to claim 1, wherein the input side lightning arrester and the output side lightning arrester are provided with contact terminals that are opened when a failure occurs and for confirming the presence or absence of the failure. Lightning protection device for equipment.   The lightning protection device for an uninterruptible power supply device of the CATV system according to claim 2, wherein a lamp indicating a failure is connected to the contact terminal.   4. The lightning protection device for an uninterruptible power supply device of a CATV system according to claim 2, wherein means for determining whether there is a failure in the contact terminal and transmitting it to a CATV station is provided. An uninterruptible power supply device comprising the lightning protection device for an uninterruptible power supply device of a CATV system according to any one of claims 1 to 4.

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