Ring Flux Test
The Ring Flux test involves exciting the core to, or near to, the full rated flux of the machine by means of several turns of a single phase high voltage winding through the bore and around the outside of the stator. The rated flux produces fault currents similar in level to those that flow when the generator is in operation. Caution needs to be taken as these currents can produce temperature rises which can cause further damage because the generator cooling system is disabled. The ring flux test can detect deep core lamination breakdown as well as back core burning, which may not be detected by EL-CID test. The core damage is represented by a localized heating of the core laminations, which is then detected by thermography equipment.Application includes: Generator Stators
High Voltage Testing Services
Dielectric Loss Angle Test (DLA)
Frequency Response Analysis (FRA)
Very Low Frequency (VLF) High Potential Test
Electromagnetic Core Imperfection Detection (ELCID) Test
Recurrent Surge Oscillograph (RSO) Test
DC Insulation Resistance (IR) and Polarization Index (PI)
