GE OPTIMA MR360 Service Training page 107

• Due to 2.15 Farad super capacitor used in gradient power supply, the rated power
of system cabinet PDU is decreased to 25KW.
• 3 phase lines and 1 ground wire are connected between MDP (Main Disconnect
Panels) and PDU.
• Input voltage is selected by inserting the incoming power cables into the
corresponding transformer terminal.
• DIP switches, under the cover, set the overload and short circuit trip on input power
as on other systems.
• There are two cables connected to the PDU control board. E-Stop control cable are
connected to three emergency off button. Another cable is from cabinet monitor,
which trip E-off contactor when issues are detected, and switch on or off Nigh
mode contactor.
• When the PDU is initially installed, all breakers are off. Be sure to observe the
correct order of switching on the PDU breakers to ensure coolant is flowing before
heat generating components, such RF amplifier, gradient amplifiers and gradient
power supply, are powered up.
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