VAR Services offer a comprehensive Energy, Harmonics and Power Quality Survey service and just as importantly, a range of Power Quality Solutions including the supply and serving of Power Factor Correction equipment, Harmonic Filters and Uninterruptible Power Supplies.
One of their clients, an international business, has several manufacturing locations producing parts for the cleaning of materials and liquids.
One of the UK sites had a concern regarding the level of electricity use and doubted the accuracy of electricity bills received. The site is supplied by two 1000 kVA transformers and consideration was being given to the installation of power factor correction equipment to help reduce the energy costs. One of the transformers supplies a main Low Voltage switchboard where the existing panel power meter was indicating that problems existed.
To check the situation and determine whether power factor correction should be considered, a Profile energy monitor was installed on each of the 1000 kVA transformers to record 5-minute demand values over a 7-day period.
Using the ProPower 3 software supplied with the Profile energy loggers, VAR Services produced a report for the client demonstrating that
- TX-1 had a PF of 0.95 lag or better throughout the survey this transformer provides ~45% of site energy
- TX-2 had a PF of 0.97 lag or better throughout the survey this transformer provides ~55% of site energy