GE H
EALTHCARE
D
IRECTION
2307224-100, R
EVISION
6
D
ISCOVERY
LS S
YSTEM
S
ERVICE
M
ANUAL
Page 62
Chapter 2 - Discovery LS System Safety Information
2.7 Power Distribution Units
Do not perform any work on the PDU unless it is de-energized. More than 100 Kilowatts of power
exist in the PDU at various periods of time, so consider all points in the PDU hazardous.
• Connect voltage measuring equipment only when power is removed and the wall power box
is locked out and tagged out.
• Always wear safety glasses because of the high voltages that exist in the PDU. Components
can literally explode when power is applied.
Be sure that all secondary protective covers on the PDU are in place before the PDU is energized.
Potential hazards are:
• Axial drive power for gantry rotation (AC)
• High voltage DC for x-ray generation (floating DC)
• Distributed console, table and gantry power (AC)
2.7.1 Compact Power Distribution Unit (CPDU)
The CPDU is shown in
Figure 2-22:
CPDU Front and Rear (Exposed View)
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9
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A5 Panel
A5 Panel
2 4 5 6 3
2 4 5 6 3
2 4 5 6 3
H3
H2
H1
Power Transformer
T1
I
0
Auxilliary Gantry
Power Switch
4600 mF
4600 mF
A2C1
A2C2
6 mF
370 VAC
6 mF
370 VAC
6 mF
370 VAC
6 mF
370 VAC
6 mF
370 VAC
6 mF
370 VAC
T2
C1
C2
C3
C7
C8
C9
L3
L4
L5