The function of high-voltage wall bushing is to help the bus pass through the barrier to link the current when the bus needs to pass through the indoor wall but can not pass through the window, or when the conditions from indoor to outdoor are different! Therefore, it is very important to install through wall casing. Today, let's talk about how to install through wall casing?
First, when installing the wall bushing, you must first check whether its model and high-voltage fuse specifications meet the design requirements, whether the porcelain body is intact, whether the screw teeth of the conductor and the semiconductor in the inner cavity of the bushing are intact. You must try a 2500V megger to check whether the insulation resistance is safe!
There are generally two ways to install the through wall casing. One is the installation method of prefabricated concrete through wall casing. Under this method, three holes shall be reserved during installation, the high-voltage load switch, and the bolts fixed first shall be buried in the concrete. The thickness of the plate shall not exceed 50mm. In this way, after the civil engineering is completed, the through wall casing shall be checked before installation, Whether the safety distance of the land can be reached through the wall casing. If it does not meet the requirements, it should be modified immediately!
Another method is to use metal through wall casing pipe plate. During civil construction, it shall be installed in advance according to the drawings, and a gap shall be opened between the two sets of pipe holes by gas welding, so as to prevent blockage!
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