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Topic:Kt Kingtronics Design and installation of surge arrester
Content:
The surge arrester is shown in Figure 7. It is built-up of 6 separate mechanical and electrical modules connected in series. The design of each module includes an HTV silicone rubber insulator moulded directly onto the internal structure with the ZnO block column. The internal cage-style mechanical structure provides high mechanical strength and well controlled short-circuit capability in the event of arrester overloading.The special location of the arrester in the tower has required extensive 3D electrical field calculations to determine necessary grading rings to control the voltage distribution along the arrester. The mass of the arrester including the grading rings is 128 kg or approximately one third of the mass of an equivalent arrester with porcelain housing. The creep age distance of 27 mm/kV corresponds to IEC class III.
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