UNITED Energy could face claims of hundreds of thousands of dollars following a massive power surge from a Mornington electricity substation on Wednesday morning. Up to 10,000 properties in Mornington, Mt Martha, Moorooduc and Somerville received 300 volts, 20 per cent more than normal, surging through power lines at about 9am. The CFA said there had been more than 55 calls for assistance, mostly generated by householders smelling smoke from electrical appliances and smouldering wiring. The CFA set up an emergency response team at its Moorooduc incident control centre to take calls from 000 and coordinate its response. Calls were…