GE HEALTHCARE
D
IRECTION 5141177-100, REVISION 14 BRIGHTSPEED ELITE, EDGE, EXCEL: PRE-INSTALLATION
Chapter 8 - Power Requirements Page 129
8– Power Req’s
2.3 Regulation
Total load regulation as measured at the PDU input terminals must not exceed 6%. The capacity of
the facility transformer and size & length of feeder wires directly affect the load regulation presented
to the system. Refer to Section 3.0 Recommended Power Distribution System, for recommended
single-unit installation specifics.
2.4 Phase Imbalance
The difference between the highest line-to-line voltage and lowest line-to-line voltage must not
exceed 2% of the lowest line-to-line voltage.
2.5 Sags, Surges & Transients
Sags and surges of the power line must not exceed the absolute range limits shown in Table 8-1.
Maximum transient voltages should be limited to 1500V peak.
2.6 Grounding
Metal conduit, raceway or the armor of armored cable used to power the system should be bonded
to the PDU cabinet. However, in addition to such mechanical grounding, a dedicated 1/0 (55 mm
2
)
or larger insulated copper ground wire must be run with the phase wires from the main distribution
panel to the PDU.
Note: The shield or armor of armored cable is not sufficient for this purpose.
The ground wire should be bonded to intermediate distribution panels through which it passes in
accordance with local codes. The resistance between the PDU ground and the facility earth ground
must not exceed 0.5 ohm. In addition, the total resistance between the PDU ground and earth must
not exceed 2 ohms.
To Next Page
Loading...
Need help?
General
