Fiber Optic Splice Closure structure and classification

Views : 0
Author : Monte Carlo
Update time : 2020-02-12 17:52:43

What are the types of fiber optic splice closure?

Previously, we had a brief introduction of fiber optic splice closure. Meanwhile, in that article we also mentioned fiber optic splice closure has two different types base on its appearance: horizontal closure and dome closure. Moreover, there are many other methods for classification:
  1. Based on its sealing method used, it can be divided into mechanical sealing and heat-shrink sealing.
  2. Based on its optical fiber cable inlet and outlet direction, it can be divided into single-side (means both optical fiber cable inlet and are on the same side of the fiber optic splice closure) or duo-side (means two optical fiber cable inlet and outlet are on both sides of the fiber optic splice closure).
  3. Based on its applications, it has three different types and each types contains different components for its usage.
  1. Distribute, the fiber optic splice closure has the ability to distribute one inlet optical fiber cable into two or more optical fiber cables. For example, this type of fiber optic splice closure may have 1 inlet and 2 outlet.
  2. Adaptors, Fiber optic pigtails connect with the adapters and the fusion-spliced tails are stored on the splice tray.
  3. Splitters & adaptors, the splitter can provide fiber optic splicing to enlarge capacity.
  1. Based on its capacity of fiber optic core, it can be divided into high-capacity, regular-capacity and mini fiber optic splice closure.
  1. High-capacity means the number of fiber optic core is at least 144 core.
  2. Regular-capacity means the number of fiber optic core is 12 to 96 core.
  3. Mini means it’s mini-size and the  number of fiber optic core can be 1 core, 2 core, 4 core or 8 core, meanwhile the mini fiber optic splice closure is also called drop cable closure.
 

What does fiber optic splice closure internal structure looks like?

Previously, we mentioned there are two types of fiber optic splice closure which looks totally different, so, before we start describing its internal structure, we will demonstrate a picture of each fiber optic splice closure to help you get start with it.

Generally, there are 4 major parts in most Dome closure:
  1. Support Frame. As you can see the drawing of FOST above, the support frame is the “Fixing shelf for FOST”, it is the skeleton of internal structure, it provide stable and fixed foundation for other components. Such as Fiber optic splice tray or cable holder, etc.
  2. Fiber optic splice tray (Fiber holding tray). Every single tray has several fixed slot, where heat shrinkable protective sleeve can be installed and house fibers.
  3. Cable holder. It’s “Fixing device for reinforced core”, it is used to stabilize the fiber optic cable, by reinforce the strength core.
  4. Electrical bounding and grounding of the metal parts, used for ground connection, make sure the lightning strike does not burn down the entire cable.
 
For horizontal closure, although the internal structure seems different, it’s actually contains same components:
 
As you can see from the drawing above, the major part – fiber optic splice tray, and the cable holder. However, you may not see the support frame, that is because it’s horizontal closure, which can be opened by half, like suitcase. The fiber optic splice tray is designed to be installed at the bottom. Also, for Electrical bounding and grounding of the metal parts, considering the chance hit by lightning is extremely rare, some may not have this part when designing.


 
pe wrapping filmgalvanized c purlin steelbathroom vanitylapel pinpolyurea applicationspathogen