METHOD FOR COATING A VARISTOR BLOCK WITH AN ELECTRICALLY INSULATING COATING, AND VARISTOR BLOCK FOR A SURGE ARRESTER

摘要

Disclosed are a method for coating a varistor block with an electrically insulating coating as well as a varistor block for a surge arrester. A varistor block (1) is formed from several varistor elements (2a, 2b, 2c, 2d) while an electrically insulating coating (5, 5a, 5b) is disposed around the varistor elements (2a, 2b, 2c, 2d). The electrically insulating coating (5, 5a, 5b) rests directly on a surface of the varistor block (1). Unwanted gas molecules are removed from the joining area between a surface of the varistor block (1) and the coating (5, 5a, 5b) before or while the electrically insulating coating (5, 5a, 5b) is applied to the varistor block (1)