Aiming at problem that the existing transmission and distribution equipment on-line monitoring system is not satisfied with accurate malfunction locating and intensive monitoring of multi-parameter

present a new type of transmission and distribution equipment on-line monitoring system architecture and focus on intelligent electronic device（ IED） for condition monitoring. Design a IED for condition monitoring that is based on RFID

the IED mainly consists of MCU

temperature sensor

current sensor

voltage sensor

and a battery-assisted RFID chip.Results of simulation and test show that

return loss of antenna of IED is about- 13. 1 d B

the maximum reading and writing range of IED is 18 m when the carrier frequency is 865. 8 MHz

drive current and working current of IED is 520 μA and 210 μA

property of IED is better than SL9000 A.