Thanks
So essentially the fan size can be reduced dramatically. I looked at a the link you posted and plotted the 0.115 m/s on the curve it gives me a static pressure rating what would I use this for. The fan is venting into the open atmosphere essentially extracting the gas contents of the...
Hi
The application is for a battery room and the 1.9 comes from a calculation used to determined the changes per hour required in the room to keep the H2 (Hydrogen) concentration to below 0.8% this is when the battery's are gassing.
So on correcting my previous error the 43.71m^3 x (1.9/3600)...
Hi
I am trying to calculate if the fan I have installed at a particular site is to large. The dimensions of the room are 4.7m x 3.0m x 3.1m that gives me a total volume of 43.71m^3 the inlet size of a single louvre vent into the room is 0.500m x 0.400m that gives me an inlet area of 0.2m^2 the...
Hi
I have a one or two questions that I would like some clarity on regarding protection using directional overcurrent and earth fault protection.
1. When using a 90°-30° characteristic (30° RCA) why is it recommended that the relay is used for the protection of plain feeders with the zero...
