- serving to reduce or decrease voltage: a step-down transformer.
Origin of step-down
First recorded in 1890–95; adj. use of verb phrase step down
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for step-down
The former is called "step-up" while the latter is a "step-down" transformer.Physics
Willis Eugene Tower
When the current reaches those places where it is to be used a low voltage is again obtained by the step-down transformer.The Niagara River
Archer Butler Hulbert
If the pressure or voltage of the secondary coil is less than that of the primary, we have a "step-down" transformer.The Story of Great Inventions
Elmer Ellsworth Burns
When used on modern supply circuits of 220 volts a number of lamps may be run in series, or a step-down transformer employed.
For accurate results a step-down voltmeter transformer should be used on the testing circuit.Electric Transmission of Water Power
Alton D. Adams