Suhono, Supriyanto, 		Purnama, Hari, AND 		Budi Utomo, Heri.
"Ground Fault Protection Using Open Break Delta Grounding Transformer in Ungrounded System" <em>Logic : Jurnal Rancang Bangun dan Teknologi</em> [Online], Volume 19 Number 1 (30 March 2019)