Brownout
Brownout turns up in 2 fields: electrotechnology, fire & safety. Here is what it means to the people in each one.
Brownout in electrotechnology
Sustained drop in supply voltage, caused by overload or applied on purpose to cut demand during a shortage.
A brownout is a prolonged undervoltage lasting minutes to hours, as opposed to a brief sag. It happens when a network is overloaded, or when an operator deliberately lowers voltage by 3 to 5 percent through tap changers to trim resistive demand, a practice utilities call voltage reduction, or conservation voltage reduction when it runs routinely to save energy. Lamps dim, motors draw more current and run hotter, and some electronic loads drop out.
"We went to 5 percent voltage reduction across the metro, so expect brownout complaints from the usual industrial customers."
Brownout in fire & safety
The temporary closure of a fire station or specific apparatus due to budget or staffing shortages.
A brownout occurs when a fire department temporarily takes a company or apparatus out of service, usually to cut overtime costs or manage staffing shortages. Unlike a permanent closure, a browned-out unit remains fully equipped but sits empty for a specific shift. This practice increases response times for the affected district, forcing neighboring stations to cover the gap.
"Engine 42 is on a brownout this shift, so we're covering their first-due area."