The corona probe locates partial discharge sites in stator winding insulation.
Features
This an off-line instrument to accurately pinpoint the source of partial discharge (PD) in a particular slot in generators and motors. Complete kit comes with PPM-97 peak pulse meter, ferrite probe, ground strap and handy carrying/storage case. The Corona Probe (originally known as the TVA probe) is used to locate partial discharge in each slot with the winding energized phase by phase. It supplements on-line partial discharge monitoring. The PPM-97 probe is generally used on motors and generators with rated voltage greater than 6 KV.
- Continuous wave sensitivity: 0.9 V RMS
- Batteries: 9 V
- Light-weight and portable
- Recommended in IEEE® Standard 1434™
Applications
- Offline PD test for locating activity in the winding
- Precisely locates PD to a particular stator slot and position
- Locates partial discharge with the winding energized phase by phase
- Can check the quality of bonding between groundwall insulation layers in the slot sections of new resin-rich and individually VPI’d coils/bars, and
the adequacy of slot resin fill in global VPI windings