Title: "Pressure Resistance" Failure Caused By Fiber Closure
Blog Entry: "Pressure Resistance" Failure Caused By Fiber Closure Greentel Fiber Closure is an integral part of fiber optic communications. Its main function is to realize the connection of the optical cable. At the same time, in order to ensure the grounding function of the optical fiber connector, the internal grounding device and the grounding portion of the optical cable must be electrically connected, and the optical component connector and the metal component and the grounding device of the optical cable reinforcing core must be ensured. They are insulated from each other to avoid adverse effects of the environment on the fiber splice closure. Fiber optic connector closures, such as fiber optic cables, have their own qualities and play a vital role in communication transmission. Since the environment in which the fiber optic splice closures are used is substantially outdoor, their environment of use may be buried, overhead or ducted. In order to prevent the impact of lightning strikes or other factors, it is required that the "compressive strength" of the fiber optic splice box must meet the requirements of no breakdown and no arc generation within 1 minute after application of a DC voltage of 15 kV. standard. Therefore, higher requirements are placed on the design of the fixing and grounding device of the fiber splice case and the insulating material used. A key issue that is most likely to cause "compressive strength" failure in fiber optic splice closures is that the distance between the ends of the fiber splice closure or between the rod and the ground is too small. The dielectric strength of uniform air at room temperature is 3 MV / m. Therefore, in order to meet the 15 kV DC non-breakdown requirements, the space between the poles or between the pole and ground should be at least 5 mm. According to this standard, the fiber optic splice closure must be immersed in 1.5 m of water for 24 hours and then subjected to a withstand voltage test. Therefore, if the seal is not good, water vapor permeation will inevitably affect the compressive strength properties. The information about Fiber Closure: