VTPTM is a complex protection system that is designed specifically to be more resilient especially when operating in harsh environments. Two part epoxy is added after a full VPI impregnation of the windings.
Before full VTP+ treatment the main stator insulation is strengthened by the addition of reinforced tape around lower radius of stator; which forms part of a resistant covering for reinforced protection on the non-driven end winding header base (where the air inlets are). At the same time the exciter stator, gets additional protection with fully taped and the full VTP+ treatment.
On the lower circumference of the stator the lamination slots get an external treatment and are reinforced with Total+ insulation protection.