Stock Code:601869.SH / 06869.HK


Optical fibre closure

Optical fibre closure is used for protecting the optical fibre fusion splicing head between two different optical cables; a reserved section of optical fibre will be kept in the closure for maintenance purpose.

In according to environmental conditions, Optical fibre closure is divided into Closure for pole and Closure for tower; in according to the different shell material, it is divided into Plastic Closure and Metal Closure.


1)    Plastic Closure is used for ADSS cable.

2)    Compare with Plastic Closure, Metal Closure has many obvious advantages as mechanical strength, leak tightness and corrosion resistance. It's usually used for OPGW.


Optical fibre closure has some excellent performances, such as good sealing property, waterproof, moisture-resistant, and incorrodible after being installed on the electric power line.

Optical fibre closure is divided into two types: joint-box and Terminal Box, joint-box is used for protecting the connection between two optical fibre cables, while Terminal Box is used for cable terminal or to protect the connection between optical fibre and jumper.

Cap-type Joint-Box

Cap-type Plastic Closure On Pole



Cap-type Plastic Closure On Tower



Cap-type Metal Closure On Pole



Cap-type Metal Closure On Tower


Horizontal type Joint-Box

Horizontal type Joint-Box is mainly used for overhead line, underground, wall cross and pipeline well installation. Apply for direct or multiple connect or diverge of optic fibre cable drop-in. It is mostly used for ordinary optic cable.


Terminal Box

Terminal Box is mainly used for optic fibre cable terminal fixation, fusion between optic fibre cable and pigtail, storage and protection of the reserved optic fibre. Generally, terminal box is including two performance structures, one is full accessories structure, and the other is empty match structure.


Joint Closure for OPPC

During the engineering application of OPPC, the optical fibre unit needs to be separated from the phase conductor; this will come down to optical fibre splicing and Photoelectricity isolation technology. For OPPC application, in order to meet with requirements of fibre splicing, protecting and high-voltage insulation, joint closure is an all-important link.

The joint closure for OPPC is quite different from OPGW and ADSS because it is electriferous during the run-time, it will affect directly to the line safety and normal operation once it is going wrong. According to voltage class, OPPC joint closure needs to adopt the appropriate insulator.

The joint closure of OPPC is divided into joint-box and Terminal Box. Joint closure is installed among towers and poles, plays the role of fibre splicing, protection and power transmission. Terminal Box realized the final optical-power separation.


Suspended type middle extraction connector box



Suspended type middle through connector box



Suspended type terminal extraction connector box



Column type middle extraction connector box



Column type middle through connector box



Column type terminal extraction connector box


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