JP2516200Y2 - Underwater branching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an undersea branching device, and more particularly to an undersea branching device for switching power supply in a submarine cable communication system.

[Conventional technology]

The prior art will be described with reference to FIG. The feeder lines 1 to 4 taken into the undersea branching device 28 from the undersea cable are terminals (A to D) attached to the surface of the internal unit 27.
Is electrically connected to the internal circuit. Power lines 1 to 4
The direction of the supplied electric current is determined in advance by the system using this device, and the electric circuit of the internal unit 27 naturally has a circuit structure whose polarity matches the above-mentioned electric current direction.

[Problems to be solved by the device]

Generally, submarine cable communication systems are
It consists of a submarine repeater and a submarine relay driving power supply, but the direction of the direct current flowing through the feeder lines 1 to 4 of the submarine cable shown in Fig. 2 is determined by the above two components excluding the submarine cable. , It is not always determined according to the circuit configuration of the undersea branching device.

Further, the seawater earth electrode 5 attached to the undersea branching device has a constraint condition in the laying construction method that when the device is laid on the seabed, it must be landed after the device. This means that the installation position of the seawater earth electrode 5 is not determined by the installation direction of the cable section including the device until the installation direction is determined.

As explained above, it is understood that the determination of the polarity for this device is in the latter half of the construction plan of the submarine cable communication system, but this has a great impact on the manufacturing period of this device. In addition, the laying direction of the cable section including this device may be changed immediately before the construction due to sea conditions and harbor conditions of the laying ship. In this case, it is necessary to change the wiring for changing the polarity in this device.
Since a high voltage of several KV or more is generally applied to the submarine cable power supply line, the wiring of the internal unit of the conventional undersea branching device is also configured to withstand this high voltage, and it is not easy to change the wiring. .

It is an object of the present invention to provide an undersea branching device that facilitates changing of the power supply polarity condition and can be applied to any undersea branching method of any undersea cable communication system.

[Means for solving the problem]

The submarine branching device of the present invention is a submarine branching device for connecting a plurality of submarine cable feed lines including a ground cable for enabling mutual communication between multiple points, wherein each of the plurality of submarine cable feed lines is connected. The same case containing a first terminal group to be connected and a second terminal group to which each of a plurality of lead wires from an internal unit to be connected corresponding to each of the feeder lines of the plurality of submarine cables are connected And a plurality of submarine cables connected to each of the first terminal groups by connecting between corresponding terminals of the first terminal group and the second terminal group. It is a configuration that enables connection with each of the plurality of lead wires from the internal unit corresponding to each of the electric wires.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. The undersea branching device 8 has a terminal case 9 having an internal unit 7, terminals 9w to 9z to which the lead wire 6 from the internal unit 7 is connected, and terminals 9a to 9d to which feeder lines 1 to 4 of a submarine cable from the outside are connected. It has and. The selection of the lead wire 6 corresponding to each of the feeder lines 1 to 4 and the connection thereof are performed by the terminal 9a.
It is realized by connecting the corresponding terminals of ~ 9d and terminals 9w ~ 9z with short short-circuit wires.

 Next, the operation will be described.

The current sent from the positive electrode power supply device 15 installed on land is supplied to the submarine cable power supply line 3, the submarine repeater 16, the internal unit 7 of the undersea branching device 8, and the terminal 9d-9 of the terminal case 9.
z, relay 10, contact 11a of relay 11, terminals 9w-9b, submarine cable power feed line 1 and submarine repeater 16 to reach the negative terminal power feed device 13 of the opposite land terminal station. At this time, the relay 10 operates by this DC current, and the contact 10a of the relay 10 is set to the position shown by the solid line in this figure. After the above-mentioned operation is completed, when the power supply is started from the negative electrode power supply device 14, the direct current thereof flows from the seawater earth electrode 5, the power supply line 4 of the submarine cable, the internal unit 7 of the undersea branching device 8, and the terminal case 9. The terminal 9a-9x, the contact 10a terminal 9c-9y of the relay 10, the feeder 2 of the submarine cable, and the submarine repeater 16 flow into the other negative electrode feeder 14. As a result, both-end station power supply between the positive and negative power supply devices 15 and 13 and seawater earth loop one-end station power supply between the negative power supply device 14 and the seawater ground electrode 15 are completed. That is, the power feeding is completed to all the submarine repeaters 16 connected between the three stations of the positive and negative power feeding devices 13, 14, and 15.

If the polarity of the negative electrode power feeding device 14 is positive, the positive electrode power feeding device 15
If the polarity of is changed to negative, the terminal case 9
As shown by the broken line in Fig. 1,
By reconnecting between 9c-9z and between terminals 9d-9y, the above-described series of operations can be similarly realized.

The purpose of the Zener diode 12 in FIG. 1 is to divide the current and supply a constant voltage to the relays 10 and 11 for supplying an appropriate current.

[Effect of device]

With the present invention, it is possible to change the polarity of this device regardless of how the power supply polarities of a plurality of land terminals are determined or the installation direction is immediately before the construction of the submarine cable system, and at least this device. The start of manufacturing the internal unit can be decided independently for this device.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing the connection of power supply lines of a conventional undersea branching device. 1 to 4 ... submarine cable power supply line, 5 ... seawater ground electrode, 6 ... lead wire, 7,27 ... internal unit, 8, 28 ...
Subsea branching device, 9 ... Terminal case, 9a-9d, 9w-9
z …… Terminal, 10,11 …… Relay, 10a, 11a …… Relay contact, 12 …… Zener diode, 13,14 …… Negative feeding device, 15 …… Positive feeding device, 16 …… Undersea repeater.

Claims (1)

(57) [Scope of utility model registration request] 1. A submarine branching device for connecting a plurality of submarine cable feed lines including a ground cable for enabling mutual communication between multiple points, wherein each of the plurality of submarine cable feed lines is connected. One terminal group and a second terminal group to which each of a plurality of lead wires from an internal unit to be connected corresponding to each of the plurality of submarine cable power supply lines are connected are provided in the same built-in case. , Each of the plurality of submarine cable feeders connected to each of the first terminal groups by connecting between corresponding terminals of the first terminal group and the second terminal group, respectively. A submarine branching device, which enables connection with each of a plurality of lead wires from the corresponding internal unit.