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Transients and surges can be caused by a variety of reasons. A few of these
include:
Poor or ungrounded equipment.
Improperly sized power distribution systems that generate disturbances when
switching large inductive or capacitive loads.
Ground fault conditions.
Equipment phase to ground or phase to phase conditions.
Arc welding to compressor or surrounding equipment.
Lightning strike to electrical distribution system
Variable speed drive applications (Induction or DC motors)
Intellisys control systems have sufficient protection against typical electrical
disturbances that can occur in the industrial environment. These systems have
been designed to exceed the highest levels specified within EN50082-2 (see
above). If the level of electrical disturbance is known to exceed these levels,
added measures of protection will be required.
These could include:
Inspection and certification of grounding systems.
Power line conditioning.
The use of three phase isolation transformer.
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