PSI

electrical power conditioning devices, namely uninterruptible power systems (both battery and generator), standby power systems (both battery and generator), transient voltage surge suppressors (including arresters), power conditioners (including isolation transformers)

consulting, including testing of above devices and actual customer site inspection and advise with regard to systems and equipment

teaching, via schools and seminars, power and systems protection from bad grounding, lightning, power company induced AC line problems, internal electrical system problems