In most aging turbine generators, windings failures are caused by the deterioration of the insulation. Vibration is always there due to interaction between mechanical and electromagnetic forces between the rotor and the stator. Structures might become loose due to thermal cycling and start to rub against each other, causing further deterioration and partial discharge. These partial discharge are arcing events that give rise to hot spots. If unattended to, hot spots might lead to fire and explosion especially in the case of large, hydrogen cooled Generators. Fortunately QPS is making available the TG Guard system with advanced VibroFibre sensors. These sensors can measure and trend the increase in vibration amplitude at the stator end winding but also instantaneous temperature increases inside the stator core. In other word, it is an excellent detector of hot spots. In stead of detecting individual PD event, TG Guard detects clusters of PD in the form of instantaneous temperature rise and allow a definitive alarm that simultaneously show a large increase of vibration amplitude accompanied by hot spots. This is a novel and cost effective condition monitoring solution that is first in the world. QPS deployed the first TG Guard system in Texas in November 2009.