Patent ID: 7493222

Claim:
A power meter comprising: (a) a data processing module including a data processing unit to calculate a current from an output of a current transducer and a datum characterizing said current transducer; and (b) a current module including: (i) a current transducer comprising: (1) a current transformer affixed to a support; (2) a conductor affixed to said support; (3) a connector to conductively connect said current transformer and said conductor, said connector removable to disconnect said current transformer from said conductor; and (4) if said first current transformer is disconnected from said conductor, a socket conductively connected to said conductor, said socket arranged to receive a conductor of another current transformer; and (ii) a current sensor memory storing a datum characterizing said current transducer, said datum readable by said data processing unit, said current module being separate from said data processing module.