... oil immersed, self cooled, pole-mounted , Conventional and CSP type. Everpower is one leader manufacturer of Single phase transformer, 50 or 60 Hz ... , mineral oil immersed, self cooled, pole-mounted , Conventional and CSP type ... ,500Secondary Voltage; 120/240V, 240V, 240/480V, 277V/4 80V Single Phase Pole Type Distribution Transformer