1. The sole aim of the design was to eliminate the mains transformer . 2. The core of the electric system is the 3-blade main transformer with oil-cooling. 3. Further investigation found that current transformers on the main transformer were improperly set. 4. But local TV stations said two main transformers were blasted in the airstrikes. 5. The main transformer trip was followed by main turbine trip and then reactor scram. 6. The main transformer is installed underfloor between the two bogies. 7. One of the first airstrikes hit the area's main transformer , plunging the camp into darkness. 8. The cause was stated to be a " main transformer / generator internal failure ." 9. Unfortunately there were reliability and performance issues with the small traction motors and low capacity main transformer . 10. In addition they all have a DC input socket for optional external power-supply via a mains transformer .