... air convection, the fanner with axial-flow: 800FZLC7,the direction of the air is coming from the bottom and outgoing from the above.9Controlling ... device: over-current, short-current, over-load protection for the fanner. Wind pressure, over heat and short current protection for ... resistance pile. There is urgent stop for the control part.12) the temperature for load bank outlet is 250-30013) ...