| 摘要 |
PURPOSE: A mold type photoelectronics transformer is provided to minimize an influence due to the surge by using photo current transformer elements. CONSTITUTION: A mold type photoelectronics transformer comprises a photo current transformer element(32), a filter(50), a phase regulator(52), an amplifier(54), a current converter(58), an amplitude error correction unit(56), and a potential transformer(60). The photo current transformer element(32) includes a light source(32a), a photo receiver(32b), and a sensor(32c) for sensing current amount flowing a high voltage line and outputting a voltage signal corresponding to the current amount. The filter(50) removes the noise of the voltage signal. The phase regulator(52) makes the phase of the output voltage of the filter into zero phase on the basis of the voltage level outputted from the potential transformer. The amplifier(54) amplifies the amplitude of the voltage signal according to the correction signal. The current converter(58) converts and amplifies the amplified voltage signal into a predetermined level current signal and outputs them to the loads. The amplitude error correction unit(56) measures the amplitude of the current level to compare the amplitude with the threshold value, and corrects amplitude error according to the comparing result. The potential transformer(60) converts high voltages to many low level driving voltages for supplying the low level voltages to each loads.
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