‘PS’ models offer Pure Sine Wave outputs suitable for all electronic transformers, switch-mode power supplies etc.
‘SI’ models utilise a modified Sine Wave output suitable for tungsten loads, wire wound transformers and any standard ‘resistive’ loads.
The maximum rated loads are based on the full circuit VA of the equipment connected.
(Example: a 3 Watt LED connected to a typical mains driver will have a circuit load of app. 7VA).