GE OPTIMA MR360 Service Training page 133

The XFD-PS is an IGBT-based switching Power Supply. It can output three sets of DC +200V,
+700V and -700V. The XFA needs the three kinds of voltages.
There are two serially connected 4.3 Farad supper capacitor (EDLC: Electrical dual layer
capacitor) in 200V DC power supply. By using super capacitor, the power of PDU can be
reduced.
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