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BS 1617 butterfly porcelain insulators are widely used in low-voltage (usually 1kV and below) overhead distribution lines, incoming lines, distribution transformer down conductors, street lamp lines, and other scenarios, especially suitable for situations that require high reliability, long life, and tolerance to harsh environments. Although modern polymer insulators (such as silicone rubber) have advantages in certain aspects such as weight and hydrophobicity, ceramic insulators still maintain strong competitiveness in terms of cost, mechanical strength, long-term stability, weather resistance, and arc resistance, especially in standardized low-voltage applications.