AMPLIFIER TYPE INSTRUMENT TRANSFORMER

摘要

PURPOSE:To obtain a small-size transformer having the large output voltage matched with an electronized apparatus and reduced in power consumption by modulating the voltage waveform divided by a main capacitor and a voltage dividing capacitor to a pulse train in a modulation part and transmitting the pulse train to a demodulation part by a transmission apparatus using an optical fiber cable. CONSTITUTION:The voltage 20 obtained by dividing voltage by the main capacitor 2 and voltage dividing capacitor 3 of an amplifier type instrument transformer is inputted to a modulation part 15 through a voltage amplifying part 4 to be converted to a pulse train 21. This pulse train 21 is converted to an optical pulse train by an E/O converter 16 and the optical pulse train is transmitted through the optical fiber cable 17 of a transmission apparatus 27 and again converted to an electric signal by an O/E converter 18 to be inputted to a demodulation part 19. By this constitution transmitting light by the optical fiber cable using the pulse train, the small-size amplifying type instrument transformer receiving no electromagnetic induction and also receiving no effect due to secular change of the light emitting element and photodetector for the transmission apparatus and matched with an electronic circuit in its output voltage and reduced in power consumption is obtained.