An electrical protection system which uses a ground fault interrupter (GFI) to protect a circuit from (A) ground faults and (B) overcurrents and/or overvoltages. For overcurrent protection, a control element may be coupled in series with the line or return input to the GFI, and a bypass element ...http://www.google.ca/patents/US5745322?utm_source=gb-gplus-sharePatent US5745322 - Circuit protection arrangements using ground fault interrupter for overcurrent and overvoltage protection 
