JP2005339857A - Lightening protection switch with thunder-resistant transformer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a space-saving and low-cost device equipped with a thunder-resistant transformer and a switch and having a function for switching over a circuit of the switch between a thunder attack time and a normal time. <P>SOLUTION: In a device equipped with a switch part 2 having a thunder attack function in the thunder-resistant transformer 3 molded by using an insulation material, and switched over to a second circuit routed through the thunder-resistant transformer in a thunder attack time and to a first circuit without being routed through the thunder-resistant transformer in a normal time, this lightening protection switch with a thunder-resistant transformer is characterized by that the switch 2 is connected to the upper surface of the thunder-resistant transformer 3 by screws; terminal parts 13 and 14 erected in the vicinity of the front surface of the upper surface of the thunder-resistant transformer 3 and terminal parts 10 and 12 formed on the front side surface of the switch part 2 are so arranged as to be set in the same line and in the same plane; and circuits are formed by connecting the terminals 13 of the thunder-resistant transformer 3 and the terminals 14 of the thunder-resistant transformer 2 to the terminals 10 of the switch part 2 and the terminals 12 of the switch by screws, respectively. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

For the purpose of preventing lightning damage, the present invention intentionally switches the low-voltage power circuit to a circuit via a lightning-resistant transformer when lightning approaches, and bypasses to connect the power supply side and the load side during lightning strikes and normal times. The present invention relates to an improvement in a device for a lightning protection switch with a lightning-resistant transformer that switches to an electric circuit that passes through, and particularly relates to a configuration in which the lightning-proof transformer unit and the switch unit are compactly and reasonably arranged.

Conventionally, it is known that a lightning surge generated by a lightning strike propagates through a commercial frequency power line and enters the building, destroying the electrical equipment connected to the power line. Various protection systems have been proposed to protect the system.

Further, in the Japanese Patent Application No. 2002-258217, the present applicant judges whether or not lightning is approaching, and when lightning approaches, the unprotected device is connected from the normal state where the protected device is connected to the low-voltage power line. Has proposed a lightning protection system that protects protected equipment by switching to a lightning protection state that is separated from

Japanese Patent Publication No.7-89712

However, since the power loss due to iron loss or the like is as large as about 3 to 10% of the transformer capacity, there is a demand to separate the lightning transformer from the power line except during a lightning strike. In the above system, there is a problem that the information before the lightning strike of the protected device is reset when the low voltage power supply is restored at the time of lightning strike because the electric circuit is disconnected from the low voltage power line at the time of the lightning strike.

The present invention forms a low-voltage power circuit via a lightning-resistant transformer only at the time of a lightning strike, and switches to a state where the low-voltage power circuit does not pass through a lightning-resistant transformer during normal times or in the future, and is also in an uninterruptible state even during the circuit switching. In other words, it is an object of the present invention to provide an apparatus having a simple and inexpensive configuration while ensuring a minimum installation space.

The present invention is to solve the above-mentioned problems, and a lightning transformer 3 molded with an insulating material is provided with a switch part 2, and the switch part 2 has a detection part 1 for detecting a lightning strike, and 2 A first electric circuit that is connected from a power source side to a load side via a bypass connection line 8 provided on a side surface of the switch unit 2; There is a second electrical circuit that connects from the side to the load side via the lightning-resistant transformer 3, and the electrical circuit from the power source side to the load side is formed by the first electrical circuit during normal times, and to the second electrical circuit during a lightning strike In a device with the function of automatically switching the circuit to the first electric circuit again at the time of lightning strike,
The switch portion 2 having a substantially cubic shape is coupled to the upper surface of the lightning-resistant transformer 3 having a substantially cubic shape by a screw, and the terminal portions 13 and 14 erected near the front surface of the upper surface of the lightning-resistant transformer 3 and the switch portion 2. Are arranged in the same row and in the same plane, the terminal 13 of the lightning transformer 3, the terminal 10 of the switch 2, the terminal 14 of the lightning transformer 2, and the A lightning protection switch with a lightning-resistant transformer, wherein an electric circuit is formed by screw-connecting the terminals 12 of the switch.

The proposed lightning protection switch 100 with a lightning resistant transformer uses the upper surface of the lightning resistant transformer 3 molded with an insulating material, and the switch part 2 is attached here, so that a special switch mounting member is not required. In addition, the lightning transformer 2 and the switch can be easily assembled to realize an inexpensive installation configuration.

Moreover, the insulation between the said switch part 2 and the lightning-proof transformer 3 is ensured by installing the said switch part 2 on the upper surface of the lightning-proof transformer 3 molded by the insulating material as mentioned above.

Further, the switch unit 2 is arranged on the top surface of the lightning-resistant transformer 3, and the detection unit 1 is assembled vertically on the top surface, so that it can be installed in a small space with a small installation area. Stable installation can be provided by arranging 3 at the lower part of the apparatus.

Furthermore, the connection terminal portions 13 and 14 erected on the front side of the top surface of the lightning transformer 3 and the connection terminal portions 10 and 12 provided on the lower portion of the front side of the switch unit 2 are arranged in the same plane and in the same row. Since each of the connection terminal portions can be screwed together to form an electric circuit, the connection between the terminals of the lightning transformer 3 and the switch 2 can be easily connected by screw connection without using any special member. And the whole electric circuit connection state can be confirmed at a time by visually inspecting the front side surface of the said switch part 2. FIG.

Next, a preferred embodiment of the present invention will be described with reference to the examples of the drawings.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
The lightning protection switch 100 with a lightning-resistant transformer of the embodiment is installed between a customer's service entrance and the load side, and a first electric circuit connecting from the power source side to the load side is formed in normal times, and when a lightning strike is detected. Is a device having a function of automatically connecting the power supply side to the load side via the lightning transformer 3 and automatically returning to the first electric circuit when lightning strikes.

As a schematic configuration, a switch unit 2 for selectively switching two electric circuits on the upper surface of a lightning transformer 3 molded with an insulating material, and a lightning strike provided on the switch unit 2 are detected. The detection unit 1 is configured.

In the lightning protection switch 100 with a lightning-resistant transformer, a screw hole 3b provided on the top surface of the lightning-proof transformer and a mounting part 6a of the switch part 2 are coupled by screws 24 (four places). The input-side fixed electrode portion 10 provided and the input-side connection terminal portion 13 of the lightning-proof transformer 3, and the output-side fixed electrode portion 12 provided in the switch 3 and the output-side terminal portion 14 provided in the lightning-proof transformer 3 are the same. Since the electric circuit connection between the lightning-proof transformer 3 and the switch portion is made by arranging the outer surface of the input-side fixed electrode portion 10 and the inner surface of the input-side connection terminal, the screw 26 ( The output side fixed electrode 12 and the output side connection terminal portion 14 are similarly screwed and joined to each other with screws 26 (three places), so that an electric circuit can be easily formed.

Further, the detection unit 1 is provided with a mounting portion 5a at a position facing a screw hole portion 6b provided on the upper surface of the switch unit 2, and is coupled to each other by screws 25 (four locations).

Further, the low-voltage power line and the connecting electric wire to the load side are provided on the upper surface of the switch unit 2 behind the device (see FIG. 2 and FIG. 3). A load connecting wire is fixed to the load terminal 7 which is extended to the upper part and fixed to the switch part 2 with a screw. Similarly, the low-voltage power line is extended from the power supply side fixed electrode part 18 similarly to the load terminal 7. A power supply side connection line (not shown) extends upward and is fixed to a power supply terminal (not shown) fixed to the switch unit 2 with a screw.

Next, each component will be described in detail.
The lightning resistant transformer 3 uses a lightning resistant transformer 3 molded with an insulating resin. The lightning resistant transformer 3 is used as an installation part of the entire apparatus on the bottom surface side of the lightning resistant transformer 3, and is used to attach the switch part 2 to the four corners of the upper surface. Lightning transformer input side connection terminals 13a, 13b, 13c and a lightning transformer output side connection terminals 14a, 14b, 14c for connecting the screw hole 3b and the electric circuit from the switch part 2 are provided. Further, on the side surface of the lightning proof transformer 3, an exterior mounting portion 3a that covers the entire device is formed.

The switch part 2 includes an electrode part for forming a first electric circuit and a second electric circuit, a mechanism part for switching electrodes, and a structure 6 formed of an insulating material for holding the electrode part and the mechanism part.

The structure 6 is provided with attachment portions 6a provided at the four corners on the lower surface side so as to face the screw hole portions 3b provided in the lightning protection transformer 3 so as to be screwed into the lightning protection transformer 3. A screw hole portion 6b for fixing the detection unit 1 is formed on the upper surface portion.

The components of the switch part 2 for forming the electric circuit include three electrodes 17a, 17b, 17c, 17d, 17e, and 17f that are rotatably held by the structure 6 constituting the switch part 2. The movable electrode portion 17 integrally formed with the electrode holding shaft 17h made of an insulating material and the load side fixed electrode portion 16 held by the structure 6 so that one end (the right side in FIG. 3) of the movable electrode portion 17 is always in contact with each other. Are arranged in the same row as the load side fixed electrode portion 16 and the power source side fixed electrode portion 18 held by the structure 6 is configured in three phases.

Furthermore, it is fixed to the structure 6 on the opposing surface of the power source (load) side fixed electrode portion 16 (18), and the other end (the left end side in FIG. 3) contacts with the rotating operation of the movable electrode portion 17. The bypass load side fixed electrode portion 11 arranged in a three-phase manner (see FIG. 4) and the bypass power source side fixed electrode portion 9 arranged in the back side in the same row as the bypass load side fixed electrode portion (see FIG. 4) 2) is held by the structure 6, and a bypass connection line 8 that connects the bypass power supply side fixed electrode portion 9 and the bypass load side fixed electrode portion 11 is held on the front side and the outer surface of the structure 6. ing. Further, on the same surface of the bypass power supply (load) side fixed electrode portion 9 (11) and on the lower side (see FIG. 3), the input side fixed electrode portion 10 and the output side fixed electrode portion 12 are connected to the structure 6. Arranged in the same row.

With the above configuration, the input side connection terminal portions 13a, 13b, 13c of the lightning transformer 3 and the input side fixed electrode portions 10a, 10b, 10c of the switch unit, and the output side connection terminal portions 14a, 14b of the lightning transformer, 14c and the output side fixed electrode parts 12a, 12b, 12c of the switch part 2 are matched, and an electric circuit can be easily formed by screwing each other.

As a mechanism part, from the connection part 17g provided in the movable electrode part 17 in order to switch the electric circuit of the said switch part 2, and the operation lever 21 driven by the motor which is rotatably held via the link 20 is shown. Become.

Next, the configuration of each fixed electrode portion will be described. Since the power source (load) side fixed electrode portion 18 (16), the bypass power source (load) side fixed electrode portion 9 (11), and the input (output) side fixed electrode portion 10 (12) have the same configuration, the bypass power source side fixed The electrode unit 9 will be described as a representative.

As shown in FIG. 4, the bypass power supply side fixed electrode portion 9 is a contact for connecting the two contact plates 9b and 9c so as to sandwich the tip end portion of the power supply side connection terminal 9a having a T-shaped cross section. Coil springs (not shown) are arranged on the axis of the support shaft 9d between the support shaft 9d, the head of the support shaft 9d, and the outer surface of the contact plates 9b and 9c, which are inserted in the center position in the longitudinal direction (L) of the plates 9b and 9c. It is comprised so that it may adjoin.

Further, in order to prevent the contact plates 9b and 9c from rotating, a holding cover 9e having a square cross section is used for the support shaft 9d of the three contact plates 9b and 9c and the structure 6 protrusion 6a. It is provided to cover the space.

In the above configuration, the first electric circuit has one end of the movable electrode in contact with the power source (load) side fixed electrode portion 18 (16) and the other end in contact with the bypass power source (load) fixed electrode 9 (11). An electric circuit passing through the bypass connection line 8 is formed. In the second electric circuit, one end of the movable electrode is in contact with the power source (load) side fixed electrode portion 18 (16) and the other end is the input (output) side fixed electrode portion 10. By contacting (12), an electric circuit passing through the lightning resistant transformer 3 is formed.

The electrode shape of the movable electrode portion is such that one end is always in contact with the power source (load) side fixed electrode portion 18 (16) and the other end is a bypass power source during the switching of the electric circuit in order to prevent a power failure. The shape is in contact with both sides of the (load) side fixed electrode portion 9 (11) and the input (output) side fixed electrode portion 10 (12).

The circuit configuration will be described with reference to FIG.
The low-voltage power line of the lightning protection switch with lightning-resistant transformer 100 is connected to the 18a, 18b, and a8c sides in the circuit diagram, and the load-side wire line is connected to the 16a, 16b, and 16c sides. In the normal electric circuit (first electric circuit), the right end portion (see FIG. 3) of the movable electrode portion 17 is in contact with the power source side fixed electrode portions 18a, 18b, 18c and the load side fixed electrode portions 16a, 16b, 16c. . On the other hand, the other end of the movable electrode portion 17 is in contact with the bypass power supply side fixed electrode portions 9a, 9b, 9c and the bypass load side fixed electrode portions 11a, 11b, 11c as shown by a two-dot chain line in FIG. It is formed from the power supply side to the load side by the bypass connection line 8 arranged on the front surface of the vessel.

Next, when a lightning strike is detected (second electric circuit), the movable electrode portion 17 is connected to the bypass power source (load) side fixed electrode portions 9a, (11a), 9b (11b), as shown by a solid line in FIG. 9c (11c) is switched to the input side fixed electrode portions 10a, 10b, and 10c and the output side fixed electrode portions 12a, 12b, and 12c, and an electric circuit from the power source side to the load side through the lightning transformer 3 is formed.

A detection unit 1 that detects a lightning surge is a control unit that determines an electric circuit switching of the switch based on the antenna 4 for detecting a lightning noise radio wave and the detected lightning noise radio wave, and performs control for switching the electric circuit It is composed of five. The antenna 4 is provided in the detection unit and can be inserted into and removed from the antenna mounting unit 5a.

The detection method of the lightning noise radio wave and the configuration of the control unit 5 are omitted.

As the electric circuit switching means of the present invention, there are a method of detecting and automatically switching lightning noise radio waves, and a method of switching manually.

Normally, the electric circuit is automatically switched. However, by removing the operation handle 22 provided in front of the apparatus, the detection unit 1 detects the presence or absence of the operation handle 2 (not shown) provided in the control unit 5. It is determined that switching from automatic switching to manual switching is performed based on the signal.

The manual electric circuit switching can be performed by inserting the operation handle 22 into an operation handle hole 23 provided on the right side surface of the apparatus and manually operating the mechanical portion of the switch unit 2.

Next, the operation will be described.
In a normal time when no lightning has arrived, the electric circuit of the switch is connected to a load by forming a first electric circuit that does not pass through the lightning-resistant transformer 3.

After the lightning surge radio wave due to the lightning strike is detected by the detection unit 1 and it is determined that the electric circuit needs to be switched, the second electric circuit passing through the lightning resistant transformer 3 is switched while maintaining the uninterruptible state. This protects the protected device from lightning surge without resetting the power supply of the device connected to the load side. It also automatically switches to the normal first electric circuit while maintaining an uninterrupted state even during lightning strikes.

The perspective view which shows the structure of the lightning protection switch with a lightning-proof transformer which is this invention The perspective view which shows the decomposition | disassembly structure of the lightning protection switch with a lightning-proof transformer which is this invention Cross section showing electrode part and mechanism part in switch part Top view of electrode part in switch part The perspective view of the lightning protection switch with a lightning resistant transformer according to the present invention The circuit diagram which shows the circuit structure of the switch part which is this invention

Explanation of symbols

1 detector 1
2 Switch part 3 Lightning protection transformer 4 Antenna
DESCRIPTION OF SYMBOLS 5 Control part 6 Structure 8 Bypass connection line 9 Bypass power supply side fixed electrode part 10 Input side fixed electrode part 11 Bypass load side fixed electrode part 12 Output side fixed electrode part 13 Input side connection terminal 14 Output side connection terminal 16 Load side fixation Electrode unit 17 Movable electrode unit 18 Power supply side fixed electrode unit 20 Link 21 Operation lever 22 Operation handle 23 Operation handle hole 24 Screw 25 Screw 26 Screw 100 Lightning protection switch with lightning transformer

Claims (1)

The lightning transformer 3 molded with an insulating material is provided with a switch part 2, and the switch part 2 comprises a detection part 1 for detecting a lightning strike, a mechanism part for switching two electric paths, and an electrode part, The switch part 2 is connected from the power source side to the load side via a bypass connection line 8 provided on the side surface of the switch part 2 and from the power source side to the load side via the lightning transformer 3 In normal times, the power circuit from the power source side to the load side is formed by the first circuit, and when it strikes, it switches to the second circuit, and then again to the first circuit during lightning strikes. In a device with a function of automatically switching circuits,
The switch portion 2 having a substantially cubic shape is coupled to the upper surface of the lightning-resistant transformer 3 having a substantially cubic shape by a screw, and the terminal portions 13 and 14 erected near the front surface of the upper surface of the lightning-resistant transformer 3 and the switch portion 2. Are arranged in the same row and in the same plane, the terminal 13 of the lightning transformer 3, the terminal 10 of the switch 2, the terminal 14 of the lightning transformer 2, and the A lightning protection switch with a lightning-resistant transformer, wherein an electric circuit is formed by screw-connecting the terminals 12 of the switch.

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