What is described as a non linear load? How should I size my generator with one?

[merryengineer]

Hi all,

What is a non-linear load? How should I size my generator to take account of these and what will be the effect if I do not?

[wellandpower]

Some items that normally represent a non linear load, due to the fact they incorporate a switched mode power supply:

personal or notebook computers
laser printers
fax machines
telephone systems
stereos
radios
TVs
adjustable speed drives and variable frequency drives
battery chargers
UPS,
and any other equipment powered by switched-mode power supply (SMPS)!


What should you do about sizing, you should allow a minimum of 20% additional in your Alternator rating in order to compensate - depending on the other loads you might need more.