One aspect of the problem of the measurement of the losses in low powe
r factor devices such as power transformers or power reactors is the v
erification of the phase angle properties of both the complete system
and its various component parts. This paper proposes the use of a digi
tal phase standard as a solution to this and other phase measurement p
roblems. When a phase standard is synchronized in both phase and frequ
ency, then its precise digital phase shift properties, used in conjunc
tion with passive phase bridges, allow the design of high-power, high-
accuracy (better than 0.001-degrees), phase verification schemes. Meth
ods using this approach are outlined that use commercially available,
easily transportable equipment to provide rapid and accurate phase ang
le measurements for almost all possible combinations of current and vo
ltage.