Sources Sought DEPT OF DEFENSE DEPT OF THE NAVY is seeking a quantity of eight (8) isolation transformers with a capacity of 330KVA over a 440-480 voltage range. These transformers will be used at Portsmouth Naval Shipyard in San Diego, CA, USA. The transformers should be able to take nominal 440V ungrounded power on the primary side and create 440V grounded power on the secondary side. They should also provide 400A of power.