I have a personal question about the ruggedness of consumer entertainment
equipment to powerline distortion, and I would like to hear any thoughts you
might have about this.

 

The potential victims are 120 VAC powered televisions, radios, disk players,
computers, etc. The environment is a recreational vehicle which uses an
inverter to create 120 VAC from onboard batteries.

 

In current practice, inverters fall into two categories; very expensive
"pure" sine wave and less expensive "modified" sine wave output. I can
understand "pure" as being relatively clean, but "modified" is a very
subjective term which the inverter manufacturers don't seem willing to
define.

 

First, is there some definition of just how much distortion is allowed for
the category of "modified" sine wave? And second, has anyone done any
examination of typical consumer electronic equipment to determine
susceptibility to "modified" sine wave power? Could we say that compliance
with typical EN CS requirements would be good enough to ensure operation in
the "modified" sine wave power environment?

 

Thanks in advance!

 

Ed Price

El Cajon, CA

USA

 


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