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GE Energy
D400 Substation Data Manager User's Manual 9
1
Before You Start
Before you begin installing and using the D400, review the information in this chapter,
including the following topics:
• Safety precautions
• Product overview
• Product specifications
• Storage recommendations
Read and thoroughly understand this guide before installing and operating the unit. Save
these instructions for later use and reference.
Warning! Failure to observe these instructions may result in serious injury or death.
1.1 Safety Precautions
Follow all safety precautions and instructions in this manual.
Only qualified personnel should work on the D400. Maintenance personnel should be
familiar with the technology and the hazards associated with electrical equipment.
• Never work alone.
• Before performing visual inspections, tests, or maintenance on this equipment, isolate
or disconnect all hazardous live circuits and sources of electric power. Assume that
all circuits are live until they have been completely de-energized, tested, and tagged.
Pay particular attention to the design of the power system. Consider all sources of
power, including the possibility of back feed.
• Turn off all power supplying the equipment in which the D400 is to be installed before
installing and wiring the D400.
• Beware of potential hazards and wear personal protective equipment.