Transformer has wider footprint in modern power distribution systems. The deregulate electrical energy market demands for a reliable and uninterrupted power supply. Therefore, sudden failure of such device is strategically important and it has technical and commercial impacts. Technically, the outage may affect system stability based on location and operating condition. Commercial aspect includes loss of revenue due to discontinuity in supply to the consumer, penalties from state or national regulatory commissions, damage to the distribution transformer and peripherals. This necessitates...