lamp ballast造句

• PCB-filled capacitors are found in very old ( pre 1975 ) fluorescent lamp ballasts, and other applications.
• PCB-filled paper capacitors are found in very old ( pre-1975 ) fluorescent lamp ballasts, and other applications.
• The department has upgraded or is in the process of upgrading standards for refrigerators, window air conditioners, fluorescent lamp ballasts, water heaters and clothes washers.
• Two different juries have affirmed allegations that Universal Manufacturing, now a division of Magnetek Inc ., defrauded Stevens and Alling by buying the rights to their new energy-saving fluorescent-lamp ballast only to keep it from going to market.
• Under the same 1987 law, the Energy Department has issued three other rules since 1997, on home refrigerators, room air-conditioners and fluorescent lamp ballasts, which together will eliminate the need for 124 such power plants, the Energy Department predicted.
• Electrical circuits containing dominantly resistive loads ( incandescent lamps, heating elements ) have a power factor of almost 1.0, but circuits containing inductive or capacitive loads ( electric motors, solenoid valves, transformers, fluorescent lamp ballasts, and others ) can have a power factor well below 1.
• Most hanging ceiling lamps tend to be passively cooled, with a combined ballast and lamp fixture; immediately restoring power to a hot lamp before it has re-struck can make it take even longer to relight, because of power consumption and heating of the passively cooled lamp ballast that is attempting to relight the lamp.
• Applications of power electronics range in size from a switched mode power supply in an AC adapter, battery chargers, audio amplifiers, fluorescent lamp ballasts, through variable frequency drives and DC motor drives used to operate pumps, fans, and manufacturing machinery, up to gigawatt-scale high voltage direct current power transmission systems used to interconnect electrical grids.