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GENERAL POWER INFORMATION
The system will operate satisfactorily using the normal
power supplied by most power companies. However,
many outside sources can cause transient electrical
noise signals or voltage level variations that can affect
system operations.
Check the electric power distribution circuits for unusual
loads that might induce excessive noise into the branch
circuits for the system. Some of the devices that can
cause such loads are:
• Air-conditioning devices
• Electric welders
• Electric furnaces
• Elevators
• Electrostatic copying machines
• Large brush-type motors
Chapter 5. Electrical Requirements
Switching heavy inductive loads or operating certain
types of equipment near the system can cause
problems, even though the source is on a different
branch circuit. If you suspect such a condition, it may
be advisable to provide a separate feeder for the system
directly from the main building power. In extreme cases
of heavy inductive loads or excessive voltage variations,
you may have to install an RF filter, an isolation
transformer, a constant voltage transformer, or
combinations of these items. Significant magnetic fields,
radiation, and high-frequency interference require
individual consideration for each installation and should
be discussed with your IBM installation support
representative. He is also available if you need help
determining whether you must alter your facilities to
correct or prevent other electrical problems.
Electrical Requirements
5-1
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