To address a number of issues caused by the existing substation dome-type splicing closure, redundant cable racks and substation frame-mounted Fiber Optic Cross Connection Cabinete was created. It is located on the ground of substation frame.

This paper provides a detailed description of the Fiber optic cross-connection cabinete. It also discusses material selection for Fiber optic joint boxes, anti-corrosion and water vapor condensation. The Fiber optic cross-connection cabinete’s basic dimensions, installation and grounding are all specified.

The current convention design sees that the OPGW optical cables enter the substation along with the line. It is then led down to the dome type splicing closing. On the inner frame of substation, the dome type splicing shutter and the residual cable framework are installed.

This method is not safe, it can be easy to age equipment and it is difficult to install and maintain. This article describes the floor-standing Fiber optic cross connector cabinete and explains how it works.

Substation Design Principle for Fiber Optic Cross-Connection Cabinete

Fiber Optic Cross Connection Cabinete1

Dome type splicing closures are used to connect and protect the optical cable lines. They can also be used to store the reserved optical fiber and prevent its damage from external environmental factors.

When the optical cable is connected, the redundant cable rack is used for placing the redundant cable. Each splice box has a redundant cable rack.

The current convention design sees that the OPGW optical cables enter the substation along with the line. It is then led down to the dome type splicing closing. On the inner frame of substation, the dome type splicing shutter and the residual cable framework are installed.

Based on the feedback received from the operation, this installation method has these disadvantages.

1) The dome type splicing closure, the residual cable frame and the installation, debugging and operation of the frame must all be done on the frame. This causes a lot more inconvenience and poses security risks.

2) The redundant cable frame and the dome-type splicing closure are attached to the frame. This affects the overall appearance of the frame and is messy.

3) The residual cable frame and the dome-type splicing closure are visible on the frame. There will be some corrosion and damage from the wind and rain over time.

Read more about Fiber Optic Connector

Installation of fiber optic cross-connection cabinete

Fiber Optic Cross Connection Cabinete

First, you should consider changing the location of the dome-type splicing shutter and redundant cable frame. Then, install the dome-type splicing shutter and redundant cable frames originally installed on the substation frames in the Fiber optic connector cabinete. The ground side of the substation frame is chosen as the installation location.

The installation site is chosen as the ground. This eliminates the danger of climbing the pole for installation, debugging, maintenance, and operation.

Fiber Optic Cross-connection Cabinete Structure Fiber Optic Joint Box

After the cable racks have been installed, you will need to create a housing for them.

The appearance of an electrical and electronic box can be used to create the appearance of a Fiber optical joint box. This is called a “floor-standing Fiber optic connection cabine” with a size of 1 450x 900x 500mm as illustrated in Figure 3. Show.

Fiber Optic Cross Connection Cabinete1

Choice of Fiber optic cross-connection cabinet materials

Fiber optic connector cabinet and Fiber optical joint box materials currently include unsaturated polyester fiber reinforced material, and metal Fiberoptic joint box.

Fiber optic joint boxes made from unsaturated polyester glass fibre reinforced material and lined with steel mesh have the benefits of long life, strong impact resistance, and high cost.

The finished Fiber optic box can’t be customized to any size. The Fiber optic box’s width is too large to accommodate a redundant cable rack. This design uses a metal fiber optic box. The properties of metal make it less resistant to corrosion, vapor condensation, and waterproofing.

How can you prevent corrosion in Fiber optic cross-connection cabinetes?

Two main ways to fix the anti-corrosion issue of metal Fiber optic crossconnection cabinete are available:

1.Use an anti-corrosion coating.
2. Fiber optic cross-connection cabinets are made with anti-corrosion materials.

Anti-corrosion coatings include electroplating, spray painting, spray painting and Dacromet (zinc-chromium) as well as other centralized processes.

Dacromet coating is one of the strongest corrosion-resistant and anti-aging options. This type of anti-corrosion measures are used in the iron tower. However, the process is more complex and costs more.

Some anti-corrosion techniques are only suitable for indoor use. It is not possible to resist harsh outdoor environments.

A Fiber optic joint box must be maintained with anti-corrosion coating.

The material is resistant to corrosion and does not require frequent maintenance. The anti-corrosion steel stainless steel is therefore used. The advantages of stainless steel include high strength, corrosion resistance and aging resistance. They also have a moderate price. Fiber optic joint box main material.

The fiber optic joint boxes are made from stainless steel which solves the Fiber optic box’s anti-corrosion problem and is also more economical.

How does Fiber optic cross-connection cabinete prevent water vapour from condensing in the Fiber optic cross-connection cabinete?

Fiber Optic Cross Connection Cabinete1

Water vapor condensation can easily be caused by metal Fiber optic cross-connection cabinete due to its characteristics. Water vapor that comes in contact with a wall below its saturation temperatures condenses exothermically to form droplets that stick to the wall.

Q=aAt(W) is the heat that is released.
The formula is: a is heat transfer coefficient for steam condensed; A represents the area of the solid walls; and Dt is the difference in saturation temperature ts from wall temperature tw at pressure.

Because of the excellent thermal conductivity of the Metal Fiber optic connection cabine, when the outside temperature drops, the temperature inside the Fiber optic connection cabine cupboarde will drop quickly with the outside temperature.

This results in heat transfer from the Fiber optic connection cabine to the outside. The fluid’s non-uniform temperature inside Fiber optic cross-connection cabinete results in natural convection and a non-uniform density field.

The boundary layer closest to the Fiber optic cross-connection cabinet wall is where the uneven temperature field will be visible. It will result in water vapor in boundary layers if the temperature in the layer is lower that the saturation temperature for water vapor in Fiber optic cross-connection cabinet. coagulate.
Flat wall heat transfer can be used to simplify the heat transfer of fiber optic cross-connection cabinete.

Heat transfer coefficient determines the speed at which heat is transferred. The heat transfer coefficient determines how fast heat is transferred and how quickly the temperature drops.

The Fiber optic connection cabine’s gas convection speed is slow. This means that the temperature inside the Fiber optic connection cabine cupboarde can drop to below the saturation temperature for water vapor in Fiber optic joint boxes, which causes water vapor condensation.

In contrast, if the temperature of Fiber optic cross-connection cabinete drops slowly, the convection times of the gas in Fiber optic joint boxes is prolonged, then the temperature in Fiber optic connection cabine will gradually drop and the saturation temperature steam will also fall accordingly. This is difficult to cause watervapor condensation.

The wall thickness and thermal conductivity in the Fiber optic cross-connection cabinete determine the heat transfer coefficient. The heat transfer coefficient drops if the wall thickness is increased and the thermal conductivity falls.

The Fiber optic cross-connection cabinete can be designed with a double-layer structure to prevent condensation of water vapour. The inner and outer layers have a split structure and the inner layer has a closed structure. The outer layer has a combined structure with an insulating layer in the middle.

The outer layer can be replaced if it is damaged without affecting normal Fiber optic connection cabine use. The hinge mechanism connects the Fiber optic joint boxes to the door panel. On the left, a plug-in lock locks the left side. The Fiber optic joint boxes are sealed with a silicone rubber sealing strips.

How do you seal the fiber optic cross-connection cabinete?

Fiber Optic Cross Connection Cabinete1

Fiber optic cross-connection cabinete performance meets outdoor requirements. Therefore, it is impossible for the interior to corrode. Fiber optic cable holes are the only way to get into the fiber optic box hole.
If the inlet hole seal is poor, moisture from the manhole can leak into the Fiber optical joint box. This will cause direct damage to components and equipment.

It is therefore important to choose materials that have basic properties, such as water insolubility, rapid condensation, good temperature performance, and no drying or cracking to solve the sealing problem.

The methods include mixed sealing (rosin and paraffin 1:1), glass glue, plasticine, or other special synthetic sealing materials. The mixed sealing method of paraffin and rosin (1:1) is commonly used in engineering to seal the fiber optic cable entry hole of the Fiber optic connection cabine.

How to Install Fiber Optic Cross-connection Cabinete?

Fiber optic cross-connection cabinete is installed at the substation. The Fiber optic joint foundation measures 800x1100x200mm, 100mm above ground. There are 4 holes drilled in civil engineering that are 80x80x200 and 4 anchor bolts. The joint box foundation’s steel frame is welded and filled using 200-gauge finestone concrete.

The substation grounding grid is connected to the grounding flat steel in the Fiber optic box. For grounding connections, special copper bars are placed in the fiber optical joint box.


Floor-standing Fiber optic cross connector cabinete eliminates hidden safety hazards from personnel working on the frame. It increases reliability of power communication and ensures safe and normal operation. It has many indirect economic benefits.

This design prevents redundant cables from being exposed outside, dome-type splicing closures, redundant cables, or redundant cable racks. It also extends the equipment’s service life. The equipment is protected from wind exposure by being placed on the frame in extreme weather conditions like typhoons. This improves the reliability of power communications.