JPS6315820B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lightning arrester adapter used to protect a mobile carrier terminal station from high voltage caused by induced lightning from outside when receiving a basic supergroup input from outdoors at a mobile carrier terminal station.

Conventional lightning arresters are mounted as a unit on top of the equipment rack, or the lightning arrester box is screwed to the shelter, but the installation method of lightning arresters requires a large area for installation. There are drawbacks to doing so. An object of the present invention is to integrate a connector and a lightning arrester circuit, and by using this assembly, even when a small office building such as a mobile carrier terminal station equipment is used, it can be used without being affected by the mounting space etc.
To enable a lightning protection circuit to be easily inserted between lines and equipment. In order to achieve this purpose,
The present invention is an adapter that is installed between the station building cable and the station building input connector in a shelter to which the station building input connector for connecting the AC signal cable is fixed, and which is connected to and detached from the station building input connector. a first connector having the same structure as the connector of the station cable; and a second connector that is connected to and detached from the station cable, has the same attachment/detachment direction as the first connector, and has the same structure as the station input connector. connector and
A series circuit of an arrester and a varistor connected linearly between the internal conductors of the two connectors, a capacitor connected in parallel with the series circuit, and a grounding terminal provided at the connection point between the arrester and the varistor. and an external conductor is electrically connected to the grounding terminal, and connects between the connection point of the arrester and the capacitor and the station building input connector, and between the connection point of the varistor and the capacitor and the cable in the station building. It is characterized by

Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 shows an embodiment of the invention. In this figure, the coaxial lightning arrester adapter 7 includes a BNC plug 1 for connecting to the station building input connector fixed to the shelter 8 and a BNC plug for connecting to the station building cable.
A jack 2 is provided. The coaxial lightning arrester adapter 7 contains a series circuit of an arrester 4 and a varistor 6 connected between the BNC plug 1 and the BNC jack 2, and a capacitor 3 connected in parallel to this series circuit. A lightning arrester grounding terminal 5 electrically connected to the external conductors of the BNC plug 1 and the BNC jack 2 is provided at the connection point between the varistor 4 and the varistor 6, and is of an unbalanced type.
Coaxial lightning arrester adapter is BNC plug 1 and BNC
Since it has a jack 2, it can be attached and detached with a single touch if necessary. This figure shows the state with the BNC connector removed. Therefore, if the lightning arrester adapter 7 is not needed in this state, the station cable can be directly connected to the station building input connector. Figure 2 shows the lightning arrester adapter installed.
In this figure, capacitors, arresters, etc. are shown by symbols, and the same numbers as in FIG. 1 indicate the same parts. In addition, in this figure, 9 is lightning ground, 10
is an outdoor cable.

In this way, the three electrical elements (arrestor, varistor, and capacitor) that occupy a large part of the space inside the adapter are connected in a connection relationship in which two are connected in series and one is connected in parallel, so that the adapter has a suitable length. It can be constructed with a slim shape and has a compact structure that is not unnecessarily thick or long, greatly contributing to the miniaturization of station buildings. It can be directly connected to the station input connector of the mobile transport device, and since a BNC connector (jack, plug) is used for connection, replacement can be done with a single touch. Also, if this lightning arrester adapter is not needed, the station cable can be connected directly to the station building input connector.

By applying the present invention, in the case of mobile carrier terminal equipment, it becomes a small office building, so if there is little space to install a lightning arrester for equipment protection, a coaxial connector lightning arrester box, The problem of mounting space can be solved by integrating internal cables.
Moreover, this allows the high lightning pressure caused by induced lightning to be disposed of at the entrance of the station building without drawing it into the station building.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention. In the figure, 1 is a BNC plug, 2 is a BNC jack, 3 is a capacitor, 4 is an arrester, 5 is a lightning arrester grounding terminal, 6 is a varistor, 7 is a coaxial lightning arrester adapter, and 8 is a shelterer.

Claims (1)

[Scope of Claims] 1. An adapter provided between a station building cable and the station building input connector in a shelter to which a station building input connector for connecting an AC signal cable is fixed, the adapter comprising: the station building input connector and the station building input connector; A first connector 1 that is attached and detached and has the same structure as the connector of the station cable; and a first connector 1 that is attached and detached from the station cable and has an attachment/detachment direction that is the same as the attachment/detachment direction of the first connector; A second connector 2 having the same structure, a series circuit of an arrester 4 and a varistor 6 connected linearly between the internal conductors of the two connectors, and a capacitor 3 connected in parallel with the series circuit.
and a grounding terminal 5 provided at a connection point between the arrester 4 and the varistor 6, an external conductor is electrically connected to the grounding terminal 5, and a connection point between the arrester 4 and the capacitor 3. A coaxial lightning arrester adapter that connects between the station building input connectors, the connection point between the varistor 6 and the capacitor 3, and the station building cable.