Last summer, the electric bill was especially high (even compared to the previous hot summer). Fortunately, your facility has a power monitor and it even goes beyond just the service gear to look at specific key loads. One of the loads it looks at is the bank of air compressors that supply plant air.
Electrical Troubleshooting Quiz, Dec. 23, 2013
What should you do if, despite lowering the air pressure from 100 PSI to 90 PSI on a bank of suspect air compressors, they're consuming even more electricity than ever?