580 Series Drive Reliability and MTBF Technical Note

This technical note explains why traditional MTBF calculations for variable speed drives are misleading, often claiming 20-50 year lifespans that are unrealistic in practice. It details how ABB designs and tests the 580 series drives (ACH580, ACQ580, ACS580) using accelerated life testing (ALT) and highly accelerated life testing (HALT) to achieve a realistic design lifespan exceeding 10 years under normal operating conditions.