In the basement, Mark gripped the heavy handle and threw the switch.
"We installed a smart logic controller," Sarah explained. "It monitors the building load in real-time. It predicts the 15-minute average. If it sees us getting close to our limit, it automatically throttles back the non-essential systems. It turns down the lobby AC by two degrees, pauses the car chargers, or delays the startup of heavy machinery."
CLUNK.
He didn't realize that a 200 Horsepower motor doesn't just start gently. It has a "starting current" or inrush current that can be 6 to 8 times higher than its running current.
Think of it like the "peak traffic hour" for your electricity usage. Even if you use very little power for 23 hours a day, the utility company must be ready to supply your one hour of heavy usage. Your Maximum Demand charge reflects that peak capacity they must reserve for you. electrical maximum demand
The sudden drop in load balanced out the massive spike from the basement fan.
If your utility uses a 30-minute interval, a 10-minute heavy load is averaged down. If they use a 5-minute interval, that same load will cause a higher MD. Know your interval to plan your staggering schedule. In the basement, Mark gripped the heavy handle
In the control room, the silence was shattered by a blaring alarm.