Raytech USA, Inc.
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10
Testing Notes:
1. Transformers may have a nameplate that lists phase displacements referred to zero
degrees. Select “0” as the phase displacement and test. Afterwards check the results against
the nameplate.
2. Greater accuracy of the actual phase displacement can be achieved by selecting a vector
grouping as close to the actual phase displacement as possible. For example: If the initial
vector grouping selected was “0”(0
) and the resulting phase was 62
then select vector
phasing “2” (2 x 30
).
3. The Phase displacement result is the phase relationship between H1 and X1, H2 and X2, etc…
