Maybe this has conked out for some reason, one phase has conked out maybe that transformer has been having some fault.
कदाचित हे काही कारणास्तव उद्भवले असेल, एका टप्प्यात असा विचार केला जाऊ शकेल की ट्रान्सफॉर्मरमध्ये थोडी चूक झाली असेल.