ceramic spool post insulator 1.Usage: low voltage 2.Standard: BS,AS,DIN,ANSI and IEC Specification:1. Porcelain or glass insulators for ... low & medium or high voltage2. Voltage:0.4KV`132KV3. The ... type, disc suspensio type, spool/ shackle type,strain typea. Disc insulatorsDisc suspension insulators for high voltage lineASNI:52-1,52-2 ...