JPH0237238Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field The present invention is a lightning protection system for low-voltage power supplies to prevent electrical equipment on the load side from being destroyed by abnormal voltages generated by surge currents caused by lightning that enters from the low-voltage power supply side. It is related to the device.

BACKGROUND TECHNOLOGY In general, a lightning protection device consists of a shield transformer, a lightning arrester, a capacitor, etc., and the abnormal voltage generated by surge current, which is an excessive current that enters from the power supply side due to lightning etc. A protective device that prevents electrical equipment from being destroyed. Currently, this lightning protection device is used in low-voltage power supplies for electrical equipment, such as firefighting radio equipment, etc., which need to be completely prevented from malfunctioning due to lightning or the like.

An example of a lightning protection device conventionally used in this low-voltage power supply will be explained below based on the accompanying drawings.

FIGS. 1 and 2 show an example of the conventional lightning protection device described above. In the figure, reference numeral 1 denotes a mounting base made of an angle or the like, and a shield transformer, a lightning arrester, a capacitor, etc., which are components of the lightning protection device, are mounted and fixed at predetermined positions on the upper end surface of this mounting base. Reference numeral 2 denotes a shield transformer, which is mounted and fixed on the mounting base 1 via L-shaped angles 5, 5 attached to both sides of the lower end of an iron core 4 protruding from its lower end face 3. 6 is a capacitor, and 7 is a terminal plate, which is held upright on the mounting base 1. A plurality of lightning arresters 8 are arranged and fixed at predetermined positions on the terminal board 7, for lowering abnormal voltage caused by surge current caused by lightning or the like. Reference numeral 9 denotes a plurality of connection terminals protruding from the front and back surfaces of the terminal plate 7, and each of the connection terminals 9 is connected to the shield transformer 2, the lightning arrester 8...8, and the capacitor 6. As mentioned above, the shield transformer 2, capacitor 6, and lightning arrester 8...8, which are the components of the lightning protection device, are mounted on the mounting base 1.
Since everything is placed on top, the mounting base 1 requires a certain size. In addition to the above-mentioned examples shown in FIGS. 1 and 2, conventional lightning protection devices include devices equipped with a case for enclosing component parts such as a shield transformer, a lightning arrester, and a capacitor.

But in any case, shield transformer 2,
All components such as the capacitor 6 and lightning arresters 8...8 are mounted and fixed on the mounting base 1 or the case,
Since the component parts are mounted and wired, a mounting base 1 and a case are always required in addition to the component parts.
The equipment becomes expensive. Further, since the structure is complicated, assembly work and wiring work are laborious and work efficiency is reduced. In addition, all components such as the shield transformer 2, capacitor 6, and lightning arrester 8...8 must be mounted on the mounting base 1, and the mounting base 1 must have a predetermined mounting area, so the device itself is large. However, there were drawbacks such as increased weight and increased installation space.

DISCLOSURE OF THE INVENTION In view of the above-mentioned conventional problems, the present invention is an improvement on the conventional problem, and its purpose is to provide a lightning protection device for a low-voltage power supply that has a simplified structure and can be supplied at a relatively low cost. do.

Therefore, as a means of achieving the above object, the present invention has a mounting plate that also serves as a terminal plate for the shield transformer, which is attached and fixed to the top of the shield transformer, and component parts other than the shield transformer, such as a lightning arrester and a capacitor, that also serve as the terminal plate. It is characterized by mounting and wiring on the mounting plate. If you do this,
The above objectives can be easily achieved, and
Assembly of the device and wiring work are also facilitated.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the lightning protection device according to the present invention will be described below with reference to the accompanying drawings.

3 to 5 show an embodiment of the lightning protection device according to the present invention. As shown in the figure, L-shaped angles 5',
5' and spacers 1 attached to both ends of the upper end surfaces of these two L-shaped angles 5', 5'.
The respective ends of two mounting plates 7', which also serve as terminal boards for the shield transformer 2, are mounted and fixed via terminals 0 and 10, and these two terminal boards (mounting plates) 7',
7' is held fixed in a horizontal position. Terminal board (mounting plate)
A capacitor 6 and lightning arresters 8...8, which are components other than the shield transformer 2, are placed and fixed at predetermined positions on 7' and 7', and the terminal plate (mounting plate)
Predetermined connection terminals 9...9 protruding from the outer end surfaces of the capacitors 6 and lightning arresters 8...8 are wired. Furthermore, two windings 11 protruding from the upper end surface of the shield transformer 2 shown in FIG.
11 is connected to connection terminals protruding from the back surfaces of the outer ends of the terminal plates (mounting plates) 7', 7'. To install the lightning protection device having the above configuration, L-shaped angles 5, 5, which are attached and fixed by bolts, nuts, etc. to both sides of the lower end of the iron core 4 protruding from the lower end surface of the shield transformer 2, are placed at the installation position of the above device. This is done by fixing.

Incidentally, in the above embodiment according to the present invention, the terminal plate (mounting plate) 7', 7' for the shield transformer 2 is divided into two pieces and installed, but this is done by attaching the two L-shaped angles 5', 5'. ′ is attached and fixed to both sides of the upper end of the iron core 4 of the shield transformer 2, mechanical deviation tends to occur, and this deviation causes the L-shaped angle 5′,
This is because the four mounting holes for the spacer 10 provided in the spacer 5' are not square or rectangular, so it may be difficult to mount and fix one terminal plate (mounting plate). However, if the above-mentioned mechanical deviation does not occur, there is no need to divide the terminal boards (mounting plates) 7' and 7' into two, and it is of course possible to use a single terminal board (mounting plate). It is. Also, the four spacers 10 interposed between the terminal plates (mounting plates) 7', 7' and the L-shaped angles 5', 5' are not necessarily necessary; Terminal plates (mounting plates) may be directly attached and fixed to both upper ends to maintain the terminal horizontally.

As explained above, the present invention mounts and fixes a mounting plate that also serves as a terminal board for a shield transformer on the top of the shield transformer, and attaches components other than the shield transformer, such as lightning arresters and capacitors, to the mounting plate that also serves as the terminal board. By mounting and wiring the device, there is no need for a mounting stand using an angle or the like or a case for enclosing the above-mentioned components as in the past, and the device according to the present invention can be supplied at a relatively low cost. This simplifies the assembly and wiring work. Furthermore, the installation space for the device can be kept to the minimum necessary, making it possible to utilize the space effectively. In addition, unlike in the past, components such as shield transformers, lightning arresters, and capacitors are integrated, so the equipment itself is smaller and lighter, and the length of wiring for each of the components is also shortened, so abnormal voltages caused by surge currents can be reduced. Sufficient effects such as an increase in the attenuation rate can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional lightning protection device, FIG. 2 is a side view of FIG. 1, FIG. 3 is a top view showing an embodiment of the lightning protection device according to the present invention, and FIG. 5 is a front view of FIG. 4, and FIG. 5 is a side view of FIG. 2... Shield transformer, 6... Capacitor,
7...Terminal board, 7'...Terminal board (mounting plate), 8...
Lightning arrester.

Claims (1)

[Scope of utility model registration request] In lightning protection equipment used for low-voltage power supplies, a mounting plate that also serves as a terminal plate for the shield transformer is attached and fixed to the top of the shield transformer, and components other than the above-mentioned shield transformer, such as lightning arresters and capacitors, also serve as the terminal plate. A low-voltage power supply lightning protection device characterized by mounting and wiring on the mounting plate.