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Authors B. Bridger, Jr. and T.A. Burse could have strengthened the argument in their paper 'Operation of Ground Sensor Relays Under Conditions of Partial CT Saturation' had they attached a concluding statement noting that GFP relay coordination curves should factor in the fact that core balanced-type ground sensors normally run with the CTs being saturated. The text might suggest this conclusion, which might not be readily apparent to the reader unless it is stated.

Opinion. Presents the author's comments on the paper `Operation of Ground Sensor Relays Under Conditions of Partial CT Saturation.' Limitations of voltage applied to the relay; Observation on the current transformer saturation effect.