Mobile measurement is useful when the machine needs to be assessed under real operating conditions, transport would be disproportionate, or the issue only occurs at the plant. At the same time, accessibility, safety, and measurement conditions must be adequately controlled. For extensive disassembly or defined load tests, the factory may be more suitable.

It can provide indications of local electrical activity in the winding, insulation, or connection area. However, on-site disturbances and the specific operating conditions influence the measurement. We evaluate patterns, levels, and trends together with machine type, reference values, and other tests.

The loss factor describes the overall dielectric state of the insulation, while partial discharges reveal more localized activity. Depending on the specific question being addressed, both methods can provide different, complementary information. The voltage level, design, and available measurement options determine the appropriate scope.

It detects changes across load transitions, starts, stops, or rare operating states. This allows sporadic anomalies to be linked to process and operational data over time. Measurement duration, channels, and recording logic are adapted to the suspected fault development.

The machine should operate under a known and sufficiently stable operating condition. Surface area, emissivity, viewing angle, distance, and environmental influences must be taken into account. Therefore, the thermal image is interpreted together with load, temperature profile, and supplementary measurement data.

We define the research question, measurement points, sensors, operating states, duration, and required reference data before deployment. Accessibility, occupational safety, shutdowns, and potential electrical interference are also clarified. Thorough documentation allows for subsequent comparative and trend measurements.