The horizontal Fiber Optic Splice Closure is an indispensable part of the optical cable communication line. Its main function is to realize the connection of the optical fiber of the optical cable. At the same time, in order to ensure the grounding function of the fiber optic splice closure, the internal grounding device and the grounding part of the optical cable should be in electrical communication, and the metal component and the grounding device of the fiber optic splice closure and the optical cable reinforcing core are ensured. They are insulated from each other to avoid adverse effects from the environment on the cable splice closure. In terms of objectivity. Since the use environment of the fiber optic splice closures is basically outdoors, their use environment may be buried, overhead or pipeline.
In order to prevent the impact of lightning strikes or other factors, the "voltage withstand strength" of the fiber optic splice closure must meet the requirements of 15 volts DC voltage applied in the standard, no breakdown within 1 minute, no arcing phenomenon. Therefore, high requirements have been placed on the design of the fixing and grounding device of the fiber optic splice closure and the insulating material used. Reasonable and rigid insulation is the fundamental guarantee for high voltage DC breakdown. There are many insulating materials available on the market today, but we need to make appropriate choices according to the standard requirements, combined with the dielectric properties and plasticity of the materials themselves.
Therefore, the structure and material of the insulation and the condition of the surface also have a great influence on the withstand voltage strength performance of the fiber optic splice closure. If the voltage withstand performance of the fiber optic splice closure is to be improved, a better insulating material such as Teflon must be used to increase the surface finish and reduce the curvature between the insulator and between the poles and the poles and between the poles and the ground. Insulating gaskets conventionally used in fiber optic splice closures generally consist of two upper and lower spacers. The upper gasket is a recessed gasket and the lower gasket is a convex gasket.