Electricity Today T&D Magazine

Viper-ST is an independent pole operated (IPO) recloser that combines the time proven reliability of electronically controlled, vacuum fault interrupters with the maintenance-free benefits of a solid dielectric insulated device. The IPO feature offers user flexibility by permitting three distinct mechanical operating modes.
• 1-phase trip / 1-phase lockout
• 1-phase trip / 3-phase lockout
• 3-phase trip / 3-phase lockout
The Viper-ST provides overcurrent protection for systems through 38kV, 800A continuous current, and 12.5kA symmetrical interrupting ratings with options for 16kA up to 27kV.