TM 5-811-1 AFJMAN 32-1080
Unit-substation transformer
neutral voltage at the line terminals of utilization
A transformer which is mechanically and electri-
equipment. Utilization voltage is sometimes re-
cally connected to, and coordinated in design with,
ferred to as secondary voltage.
one or more switchgear or motor-control assem-
Voltage transformer (VT)
blies, or combinations thereof. See primary and
An instrument transformer which has its high
secondary unit substations.
voltage winding connected in parallel with the
Utilization voltage
power source, which is to be measured. VT is a
The root-mean square phase-to-phase or phase-to-
synonym for potential transformer (PT).
GLOSSARY 4
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