This part of IEC 60034 provides a common basis for:
– measuring techniques and instruments;
– the arrangement of test circuits;
– normalization and testing procedures;
– noise reduction;
– the documentation of test results;
– the interpretation of test results,
with respect to partial discharge off-line measurements on the winding insulation of rotating
electrical machines.
The measurement methods described in this document are applicable to stator windings of
machines with or without conductive slot coating and to the stator windings of machines made
with form wound or random wound windings. In special cases like high voltage rotor field
windings, this document is applicable as well. The measurement methods are applicable when
testing with alternating sinusoidal voltages from 0,1 Hz up to 400 Hz.
Interpretation guidelines are given in this document and are applicable only if all the following
requirements are fulfilled:
– Measurements performed with power frequency of 50 Hz or 60 Hz, or when testing with
power supply within a frequency range of 45 Hz to 65 Hz.
– Form wound windings and winding components such as bars and coils.
– Winding with conductive slot coating. This is usually valid for machines with voltage rating
of 6 kV and higher.
For machines with random wound windings, form-wound windings without conductive slot
coating, and testing at frequencies differing from power frequencies, the interpretation
guidelines are not applicable. The testing procedures for off-line PD-measurements of this
document can be used for assessing the uniform quality of manufacturing or/and the trending
of these kind of windings as well as converter driven machine windings.