Polymer (Composite) Fused Medium Voltage Outdoor Disconnector (Isolator) Product Description Polymer (composite) fused medium voltage disconnectors are designed for safe switching of no-load circuits in power transmission and distribution systems. Manufactured in compliance with IEC and TSE standards, these disconnectors are available in 12 kV, 24 kV (17.5), and 36 kV voltage levels. The main frame is hot-dip galvanized steel for maximum durability. Moving and fixed contacts are made of e