GE Industrial Solutions POWER LEADER PMCS Network Architecture Guide - Manual (Page 47)

Power Management Control System
Chapter 3 – Network Wiring and Construction
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Chapter 3. Network Wiring and
Construction
Once the network has been carefully laid out on paper
and IED addresses have been planned, you need to
check the following wiring requirements before
beginning assembly of the system.
WARNING: Network wiring and grounding rules described herein apply
primarily to commercial and industrial installations. Substation
installations will exist in the presence of dangerously elevated ground
potential relative to points outside of the station grid as well as large
electromagnetic induction fields. Additionally, large ground faults can
elevate substation ground potentials. Follow local utility best-practices and
safety procedures to prevent risk of shock or electrocution to personnel
and damage to equipment that could result in a loss of protection and
communications.
CAUTION:
The recommended installation practice is to implement
optical fiber for connections between buildings to provide electrical
isolation. This eliminates harmful ground loops caused by differences in
the ground potential between structures.
CAUTION: Data line surge protection is recommended for network
components such as hubs, computers, or modems connected to IEDs with
copper wire, especially installations where the data communication cable is
exposed (i.e., not encased in conduit) or runs parallel to power
conductors. PMCS IEDs are routinely installed in areas exposed to heavy
electromagnetic fields (EMF), which can induce damaging surges in data
communication lines. Data line surge protection is not required for fiber
optic connections.