Certified Data Centre Professional (CDCP) Practice Exam

The classification of UPS (Uninterruptible Power Supply) technologies according to IEC-62040 considers various performance characteristics and operational methodologies. Delta conversion technology is recognized for its unique ability to separate the critical load from input disturbances while optimizing efficiency, but it generally provides a lower classification compared to other advanced UPS systems like true online double conversion and high-frequency transformless designs.

True online double conversion UPSs are regarded as the highest classification because they provide continuous power conditioning and isolation, ensuring that the output power is consistent regardless of input conditions. High-frequency transformless systems also offer great efficiencies and are typically used in scenarios where space and energy consumption are critical, but they still maintain the superior performance standard set by true online systems.

In contrast, delta conversion technology, while effective, is designed with a slightly different operational focus that may not prioritize conditioning to the same level as the others. It primarily achieves efficiency gains by allowing direct feed of energy to the output while using only one path for load. This makes it suitable for certain applications but means that it does not meet the rigorous criteria set by IEC-62040's higher classifications for consistently providing clean, conditioned power in all scenarios.

As a result, delta conversion is recognized for its comparatively lower classification within the context of UPS