CN203012211U - Optical cable cross-connecting box with isolating base - Google Patents

Abstract

The utility model discloses an optical cable cross-connecting box with an isolating base. The optical cable cross-connecting box w comprises a cross-connecting box body, the cross-connecting box body is internally equipped with an optical cable joint box, a redundant optical cable frame, and an grounding busbar, and the grounding busbar is connected with the optical cable joint box and the redundant optical cable frame through a ground wire; the grounding busbar is connected with one end of a grounding connecting wire, and the other end of the grounding connecting wire is connected with ground; and the cross-connecting box body is connected with a supporting insulator base through supporting insulators, and the supporting insulator base is connected with the foundation. The utility model provides the optical cable cross-connecting box with the isolating base, the structure is simple, an OPGW optical cable can be completely separated from a ground wire in a transformer substation, and the optical cable cross-connecting box is easy to operate, and safe and reliable.

Description

An optical cable transfer box with an isolation base

technical field

The utility model relates to an optical cable transfer box with an isolation base.

Background technique

With the wide application of composite ground cable (OPGW) in the power system, substations need a large number of OPGW introduction and transfer devices. At present, the commonly used optical cable transfer box is to install the remaining cable rack and the splice box in a floor-standing metal box, and the OPGW optical cable and the metal-free optical cable will tie their redundant optical cables on the optical cable residual cable rack, and the OPGW optical cable and the metal-free optical cable are in the optical cable. The joint box is connected inside, and the metal box is installed on the concrete foundation, as shown in Figure 1.

There are major problems in the current installation method: since the foundation of the optical cable transfer box is connected to the grounding body in the substation, when the grounding resistance of the substation needs to be measured, the OPGW cannot be completely disconnected from the grounding in the substation, which affects the accurate measurement of the grounding resistance of the substation.

Utility model content

In order to solve the above problems, the purpose of this utility model is to provide an optical cable transfer box with an isolation base, which has a simple structure, can completely separate the OPGW optical cable from the ground wire in the substation, and is easy to operate, safe and reliable.

The utility model is for achieving above-mentioned purpose, and the utility model adopts following technical scheme:

An optical cable transfer box with an isolation base, including a transfer box body, an optical cable joint box and an optical cable residual cable rack are respectively installed in the transfer box body, a ground junction bar is installed in the transfer box body, and the ground junction bar respectively connected to the optical cable joint box and the grounding wire of the remaining optical cable frame; the grounding junction bar is connected to one end of the grounding connection wire, and the other end of the grounding connection wire is connected to the ground; the transfer box is connected to the base of the post insulator connected, and the base of the post insulator is connected to the foundation.

The ground connection bar is connected to the ground through the only one ground connection wire.

The beneficial effects of the utility model are: the utility model provides an optical cable transfer box with an isolation base, which has a simple structure, can completely separate the OPGW optical cable from the ground wire in the substation, and is easy to operate, safe and reliable.

Description of drawings

Fig. 1 is the schematic diagram of conventional metal optical cable transfer box;

Fig. 2 is a structural schematic diagram of an optical cable transfer box with an isolation base of the present invention;

Fig. 3 is a schematic diagram of the installation design of an optical cable transfer box with an isolation base according to the present invention.

Detailed ways

Example 1

As shown in Figure 2, what this embodiment provides is an optical cable transfer box with an isolation base, including a transfer box body 2, an OPGW optical cable 5, and a metal-free optical cable 6, and optical cable splice boxes are respectively installed in the transfer box body 2 3. The remaining optical cable rack 4, the OPGW optical cable 5 and the metal-free optical cable 6 are respectively connected to the optical cable joint box 3 through the remaining optical cable rack 4, and a ground junction bar 10 is installed in the transfer box 2. The junction bar 10 is connected to the grounding wires of the OPGW optical cable 5, the optical cable splice box 3 and the cable rack 4 respectively; connected; the transfer box 2 is connected to the post insulator base 9 through the post insulator 8 , and the post insulator base 9 is connected to the foundation 1 . The ground connection bar 10 is connected to the ground 7 through a single ground connection line 12 . The OPGW optical cable 5 is jacketed with an insulating tube 11 , and the insulating tube 11 is jacketed with a galvanized steel pipe 13 .

As shown in FIG. 3 , the OPGW optical cable 5 is led down from the outlet frame and enters the transfer box 2 through an insulating tube 11 , and the insulating tube 11 is protected by a galvanized steel pipe 13 . After the OPGW optical cable 5 enters the transfer box 2, it is first coiled on the optical cable remaining cable rack 4, and then led to the optical cable splice box 3. The metal-free optical cable 6 in the station is fused with the OPGW optical cable 5 in the optical cable joint box 3, and is connected to the machine room after being coiled by the optical cable remaining cable rack 4. The metal part of the OPGW optical cable 5 is connected to the ground connection bar 10 . Through the ground connection line 12 , the ground connection bar 10 is connected to the ground connection line 12 of the substation ground 7 . The OPGW optical cable 5 is connected to the frame only at one point on the top of the frame, and the down-conductor clip in the middle of the frame is insulated from the contact surface of the OPGW optical cable 5 .

When measuring the grounding resistance of the substation, only need to remove the OPGW optical cable 5 and the grounding connection terminal 14 on the frame, the OPGW optical cable 5 can be completely disconnected from the substation grounding, eliminating the influence of the grounding of the iron tower outside the station on the measurement of the substation grounding resistance. After the resistance measurement of the main grounding network of the substation is completed, the grounding of the transfer box and the outlet frame should be restored immediately.

The optical cable transfer box with isolation base manufactured in this embodiment has a simple structure, can completely separate the OPGW optical cable from the ground wire in the substation, and its operation is simple, safe and reliable.

Claims (2)

1. the fiber cable cross connection box of a seat isolated at the end, comprise handing-over casing (2), be separately installed with cable splice closure (3), the remaining cable frame (4) of optical cable in described handing-over casing (2), it is characterized in that: ground connection tandem row (10) is installed in described handing-over casing (2), and described ground connection tandem row (10) is connected with remaining cable frame (4) ground wire of cable splice closure (3) and optical cable respectively; Described ground connection tandem row (10) is connected with grounding connection line (12) one ends, and the other end of grounding connection line (12) is connected with ground connection (7); Described handing-over casing (2) is connected with supporting insulator base (9) by support insulator (8), and described supporting insulator base (9) is connected with ground (1).

2. the fiber cable cross connection box of a kind of seat isolated at the end according to claim 1, it is characterized in that: described ground connection tandem row (10) is connected with ground connection (7) by a unique grounding connection line (12).

Images