Surge testing is undoubtedly the most comprehensive single test available for wound products. Its primary function is verification of insulation integrity. Designed for rapid Go/No-Go testing, the 1660 detects latent and existing insulation failures such as turn-to-turn shorts, layer-to-layer shorts, coil-to-coil shorts, winding-to-winding shorts, and phase-to-phase shorts are best detected by surge testing.