Fig. 17: HC classification
The HC classification provides an approximate statement concerning the water repellent
features of the composite insulator. The HC classification is simply a rough comparative
procedure and does not permit any statement of a guaranteed operating performance.
► In wind-free and dry weather, spray a hand-size area abundantly with water from a spray-
bottle at a distance of approx. 30 cm.
► Compare the drop pattern with the HC classification.
→ If the drop pattern corresponds to the HC classes HC 1, HC 2 or HC 3, then the water
repellent feature of the composite insulator is still adequate.
Range STARIS®-Sia+
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