JPH0317108B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cable testing device used for actual load testing of power cables.

Manufactured cables are generally shipped after conducting actual load tests. A terminal device is used in this test.
As shown in the figure. That is, as shown in the figure, in this device, a test terminal part 1' is provided on a pedestal 2' which is fixedly arranged at a fixed interval, and a test cable 3' is connected between these terminal parts 1' as shown in the figure. It is composed of
Such a conventional device requires an ineffective portion of the cable 3' under test, as indicated by L1 in the figure.

As is well known, this type of power cable has a large diameter and is difficult to handle, and the mount and terminal section on which it is fixed are also large and require a large area and space. The formation process itself is difficult and dangerous, and takes a long time.

To solve this problem, for example,
13722, a resin insulator that covers the end of the test cable is installed in one opening of the bent tank, and an air terminal is installed in the other opening so as to be perpendicular to the insulator, and both are connected inside the tank. At the same time, a test device has been proposed in which the tank is filled with an insulator. With this device, the above problems are solved to a large extent. However, because the part where the aerial terminal part and the test cable connect are attached to a single tank structure, the tank itself becomes large and it is difficult to fill the tank with insulating medium.
Further improvements are desired.

It is an object of the present invention to provide a cable testing device which completely overcomes the drawbacks of the conventional devices and which is particularly economical and easy to assemble compared to the device using the tank described above.

According to the present invention, the air terminal for charging is installed on a trolley, and the connection part main body housing the voltage charging side terminal and the sleeve is installed on the trolley as well, and the air terminal for charging and the charging The above object is achieved by connecting these two with a connecting cable placed in an exposed state between the side end portions, and configuring the end portion of the test cable to be connected within the sleeve.

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 is a partial cross-sectional view showing an embodiment of the present invention. In the figure, the energizing aerial terminal 1 and its pedestal 2, which are conventionally fixedly arranged, are fixed on a trolley 6. FIG. A connecting portion main body 100 is also fixed on this trolley 6. This connection part main body 100 includes a metal case 8, a power-supply side terminal part 9 provided on the pedestal side inside the metal case 8, a sleeve 12 for receiving the test cable 3, and a conductor connection part 16 between the two. It consists of a shield 11 for the conductor connection portion 16 and an insulator 10 that fills the space defined by each of these elements.

The charging air terminal section 1 and the charging side terminal section 9 are connected in advance by a connecting cable 7 placed between them in an exposed state, and the terminal section 9 contains an appropriate cable. Filled with insulation. Note that 5 is a stress cone provided within the power-supply side terminal portion 9 and around the connection cable 7.

Test cable 3 for this connection body 100
The connection and preparation for use are carried out as follows. That is, first, a stress cone 14 is provided at one end of the test cable 3 to perform terminal treatment, and then the trunk tube 15 is fixed. Next, this trunk tube 15 is fixed to the sleeve tube 12. Next, insert this cannula 12 into the case 8.
At the same time, the conductors of the connection cable 7 and the test cable 3 are inserted into the conductor connection part 1 in the shield 11.
After that, the inside of the case 8 is evacuated and an insulator 10 is filled and sealed. Then, the other end of the test cable 3 is subjected to the same process and ready for use.

FIG. 3 shows another embodiment of the connecting portion main body of the testing device of the present invention. The connection body of FIG. 3 is constructed by using a suitable insulating plastic such as epoxy resin in place of the metal case 8 and filled insulator 10 in FIG.
0, and a conductive layer 21 is formed on the insulator 20 by applying conductive paint or the like. In the case of this embodiment, the connection between the inner end of the sleeve (high voltage side) and the end of the test cable is made removable using a suitable plug-in type connecting member 22. According to this embodiment, the structure and assembly of the device itself becomes simpler and extremely economical.

According to the cable testing device of the present invention configured as described above, since it is mobile, cable testing can be performed at any location, and the dead length of the test cable can be significantly shortened.
For example, the effective length L of the conventional device for voltage class
1 and the invalid length L2 of the device of the present invention are compared as shown in the following table.

Voltage class L1(m) L2(m) No. 60 2.5 1.0 No. 140 4.0 1.2 No. 200 7.9 2.2 No. 500L 13.0 3.5 Furthermore, according to the test device of the present invention, the air terminal for charging and the terminal on the charging side Since the connection is made with a cable placed between these two in an exposed state, the entire connection between the aerial terminal and the test cable is placed in a single tank, as in Utility Model Publication No. 50-13722. Its structure is extremely simple compared to those that are mounted, and its manufacture, assembly, and maintenance management are extremely easy, and it is also extremely safe.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a conventional cable testing device;
FIG. 2 is a schematic partial cross-sectional view showing one embodiment of the cable testing device of the present invention, and FIG. 3 is a schematic cross-sectional view of the connecting portion main body of another embodiment of the cable testing device. 1; Air terminal for charging, 2; Frame, 3; Test cable, 5, 14; Stress cone, 6; Dolly,
7; Connection cable, 8; Metal case, 9; Power supply side terminal, 10; Insulator, 11; Shield, 1
2; Mantle, 13, 20; Insulator, 15; Trunk tube, 1
6; conductor connection portion, 21; conductive layer, 22; plug-in type connection member, 100; connection portion main body.

Claims (1)

[Scope of Claims] 1. A trolley 6, an energizing aerial terminal section 1 fixed to the trolley 6, a connecting section main body 100 fixedly disposed on the trolley 6, the aerial terminal section 1 and the above. A cable 7 is disposed in an exposed state between a connecting part main body 100 and electrically connects the two. 9, a sleeve 12 disposed opposite to the power-supplying terminal 9, a conductor at the end of the cable 7 at the power-supplying terminal 9, and a test specimen to be inserted into the sleeve 12. cable 3
a shield portion 11 that shields the conductor connection portion 16 with the conductor at the end of the insulator 10 that covers the power-supplying side terminal portion 9, the sleeve 12, and the shield portion 11;
and a conductor 8 covering the insulator 10. 2 The conductor 8 is a metal tube, and the insulator 1
The cable testing device according to claim 1, wherein 0 is a fluid. 3. The cable testing device according to claim 1, wherein said insulator 10 is a plastic molded insulator, and said conductor 8 is a conductive layer provided on the surface of said molded insulator.