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GE Healthcare
Direction 5743854-1EN, Revision 1
Chapter 5 Electrical
Section 1.0 System Facility Power and Grounds
1.1
Introduction
The purpose of this section is to ensure that the product is properly powered and grounded, thus
ensuring the proper operation of the product installed. The information in this section should be
adhered to, unless there are written deviations approved by GE Healthcare.
This section gives the sizes and procedures on how to power and ground your system. If these
power and grounding instructions are not adhered to, proper operation cannot be guaranteed. Any
cost associated and found to be a result of non-conformity, as stated in this section, may result in
additional cost charged back to the institution and/or their contractor.
All system and sub-system power connections shall be made ONLY to power outlets that are
connected to the system.
1.2
Power Quality
The electrical power, from its origination to the system, must adhere to the wire size and
transformer sizes as prescribed in the installation drawings. The feeder voltage-drops, as well as
the supplying power, must be within the given parameters. Sizing for feeder is usually calculated
for a maximum of 2% voltage drop at the minimum voltage range. The actual feeder sizing may
vary from the installation drawing for a facilities voltage.
Calculate feeder losses before you begin. Total feeder losses must be calculated to ensure that
the losses are less than those specified in the installation drawings. Calculating the recommended
minimum transformer sizing for feeding a system ensures the transformer losses are less than half
of the maximum regulation for the system.
Regulation is the calculated voltage losses for the entire power distribution system (No-Load
Voltage minus Full-Load Voltage) divided by the no-load voltage minus the system losses (Full-
Load Voltage):
Chapter 5 - Electrical
Optima XR642/XR648 Pre-Installation
Page 95
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