| 摘要 |
PROBLEM TO BE SOLVED: To provide a monitoring apparatus that uses a small coil as power supply and detects a busbar temperature through simple circuitry. SOLUTION: The monitoring apparatus includes: a sensor RF unit 3 that detects the temperature of a busbar and transmits the data of the detected temperature to the outside; a power supply unit 2 that has a power generating coil 2a for generating power by an alternating-current magnetic field produced by current passage through the busbar and a charging portion 2d for charging power generated by the power generating coil 2a and supplies power charged in the charging portion 2d to the sensor RF unit 3 for driving; and an enclosure 4 that houses the sensor RF unit 3 and the power supply unit 2 within a dimensional range not exceeding the busbar width and is fixed on the busbar. COPYRIGHT: (C)2009,JPO&INPIT
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