Why power factor has to be taken into account when specifying a UPS

When specifying a new UPS, its power rating must be well matched to the job in hand. If the UPS cannot handle the real power and the reactive power consumed by the load an overload situation will quickly develop that could lead to UPS damage or outage and the critical load becoming unprotected.

However, picking the correct power rating is not as straightforward as it may seem as, for most applications, the aspect of power factor and load profile will have to be taken into consideration.

To find out how this approach can be taken in practice, we highly recommend the ABB White Paper “Power factor and the uninterruptible power supply” by Elina Hermungen.

Download (PDF, 125KB)

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