SEG Electronics GmbH Manual MRG3
78 DOK-TD-MRG3, Rev. D
Important Information on the Vector Surge Supervision:
Single Phase Vector Supervision "1-of-3" ("1Ph" on the Display)
Within the Area „Safe Area“ the trip decision depends on the set Angle „Delta phi“ only (please re-
fer to figure Single Phase Vector Surge Supervision).
Within the Area „Unsafe Area“ a trip decision is taken if the vector surge angle „Delta phi“ is ex-
ceeded or if the magnitude of the voltage vector is shrinked (percental related to the rated voltage).
In order to prevent faulty tripping the effective area of the vector surge supervision can be limited
by means of the parameter "UB<".
Three Phase Vector Surge Supervision "3-of-3" ("1Ph" on the Display)
Within the Area „Safe Area“ the trip decision depends on the set Angle „Delta phi“ only (please re-
fer to figure Three Phase Vector Surge Supervision).
Within the Area „Unsafe Area“ a trip decision is taken if the vector surge angle „Delta phi“ is ex-
ceeded or if the magnitudes of the three voltage vectors are shrinked (percental related to the rated
voltage). In order to prevent faulty tripping the effective area of the vector surge supervision can be
limited by means of the parameter "UB<".
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