1 Scope
This part of IEC 60034, which is a technical specification, provides a common basis for
-
– measuring techniques and instruments;
-
– the arrangement of the installation;
-
– normalization and sensitivity assessment;
-
– measuring procedures;
-
– noise reduction;
-
– the documentation of results;
-
– the interpretation of results;
with respect to partial discharge on-line measurements on the stator winding insulation
of non-converter driven rotating electrical machines with rated voltage of 3 kV and
up. This technical specification covers PD measur ing systems and methods detecting
electrical PD signals. The same measuring devices and procedures can also be used
to detect electrical sparking and ar cing phenomena.
NOTE The main differences between on-line measurements and o ff-line measurements are due
to a different voltage distribution along the winding and various thermal and mechanical
effects related to the operation, like vibration, contact arcing or temperature gradients
between stator copper and stator iron core. Furthermore, especially for hydrogen-cooled
machines the gas and the gas pressure is different for off - and on-line PD measurements.