please, we have an electrical power supply installation to one unit of Balanced Power Plus 225kVA static UPS machine and two 75kW pumps. All three equipment are supplied power from the same busbar. We propose to install dual soft start panel to replace the existing dual star-delta panel that is presently used to power the pumps from the 415V LV busbar. The pumps are 3-phase.
However, we will like to know if we are going to be experiencing problems with harmonics when the pumps are running after we have installed the soft-start panel. We wish to know if this panel upgrade will cause an increase in the Total Harmonic Distortion (in current and voltage) and what the effect on the UPS will be. Also, we will like to know if there are equipment that we can install that will limit the THD to acceptable values (for the UPS) when the pumps are running.
Do treat as urgent and thanking you for your co-operation and support.