The Inefficiency of PQ

摘要

Recently, a colleague from the NFPA 70B Electrical Equipment Maintenance Committee asked me for statistics on energy efficiency and power quality (PQ). Plenty of statistics are available on the financial impacts of power quality phenomena on productivity. For example, a typical textile mill will experience a $10,000 loss when a sag causes a difference in torque on the drums, resulting in the fiber breaking. Or consider financial institutions, such as the stock markets, where losses are measured in millions of dollars or more per minute of down time. But efficiency and PQ was a new question for me.