or step down voltage and current levels for either distribution or
transmission. They perform these functions with the use of a primary
winding and one or more secondary windings located within the
winding induces the secondary winding(s) with voltage and current.
The windings are placed in close proximity, but are electronically
isolated from each other.
The power induced into the coils can either be stepped-down,
meaning an increase in current and a decrease in voltage, usually
required for distribution, or stepped-up meaning a decrease in
current and an increase in voltage, usually required for
that are hidden within a device to large units that are used to
interconnect power grids. Transformers have become an essential
component for high voltage power transmission as they ensure long
distance transmission is economically practical.