Basics of Rotating Machine Testing #3 | Voltage Withstand (Overvoltage/Hi Pot) Measurement

In Part 3 of our five-part “Basics of Rotating Machine Testing” how-to video series, Alexander Herrera—an OMICRON application engineer specializing in rotating machines—shows you how to perform a voltage withstand (Overvoltage/Hi-Pot) measurement. Learn how to verify that your insulation system can tolerate elevated electrical stress without breakdown using a controlled AC test and discover how to interpret the measurement data.

00:08 - Introduction to voltage withstand testing
00:27 - Understanding insulation stress and the purpose of the test
00:54 - Connecting the setup and preparing the first phase
01:15 - Efficiency: Combining Hi-Pot with PD and Tan Delta tests
01:28 - Evaluating results: Voltage stability vs. breakdown
01:58 - Graphical analysis using MPD Suite software
02:55 - Summary: Criteria for a successful test

Voltage withstand measurements are among the four primary test procedures recommended for assessing the insulation health and integrity of stator windings in rotating electrical machines. Don't miss the rest of our how-to videos about the following diagnostic measurements:
- Part 1: DC Insulation Resistance & Polarization Index (PI) Measurement
- Part 2: Capacitance & Dissipation/Power Factor (Tan Delta) Measurement
- Part 4: Partial Discharge (PD) Measurement

To ensure comprehensive machine maintenance, we also recommend checking for damaging inter-laminar insulation faults (hotspots) in the stator core. Watch Part 5: Stator Core Low Energy (EL CID) Test to see how Alex performs this inspection and analyzes the results.

Видео Basics of Rotating Machine Testing #3 | Voltage Withstand (Overvoltage/Hi Pot) Measurement канала OMICRONenergy