Patent ID: 7417558
Filing Date: 2008-08-26
Classification: G01D,G01R,Y02B,Y04S

Abstract:
1. An intelligent electronic device (IED) for monitoring at least one power parameter in a power system, the IED comprising: at least one voltage input operative to be coupled with at least one power line in said power system and operative to sense at least one voltage in said power system; at least one current input operative to be coupled with said at least one power line and operative to sense a current flowing through said at least one power line; at least one analog to digital converter coupled to said voltage input and said current input and operative to produce digital samples indicative of said voltage and current; a processor coupled with said at least one analog to digital convener and operative to calculate said at least one power parameter; a power supply operative to supply power to said IED; a transceiver operative to communicate, at least one data packet comprising said at least one power parameter via time domain pulses of RF energy occupying a wide range of frequencies; an antenna coupled with said transceiver operative to transmit said RF data packet; and an enclosure which surrounds at least said antenna so as to partially interfere with RF transmissions at a subset of frequencies, said transceiver being operable to transmit said RF data packet out of said enclosure at other frequencies of the wide range of frequencies, said enclosure including a lateral surface comprising at least one void that allows certain RF frequencies to penetrate said enclosure based on the size of said voids.