ANSI IEC Line Post Insulator 57-2Short / 57-Long-IEC Standard Testing Specification.
Descriptions:
Line post insulators shall conform in all respects to the requirements of ANSI standard.
Metal parts shall be made of a good commercial grade of malleable iron, ductile iron, steel, or aluminum. Ferrous parts, other than stainless steel, shall be galvanized in accordance with ASTM A153.
Competitive advantages: