Hi:
Do anyone have the experince about the cleaning the casting parts with ultra-sound wave before these parts are painted.
we plan to install a new painted workshop, in the form time, we clean the casting part with acid, pure water and other chemical to clean the casting parts( aluminum), now...
Dear everyone:
Would you like to give me some hint about how can I decide the primary current for the zero-sequence CT? In my concept, only in the condition of earthing fault or 3 phases is unbalanced, the zero-sequence current created and normarlly it will big especial when the 1 phase...
In Excel, we can filter the data, when we want to input the filting critiria, we can choose or input from the filter list box, but how can I get the quantity of the items listed in this box?
