Mounting
Fix the unit to a flat, vertical surface using the mounting holes (or slots) on its base-plate. The mechanical outline
diagrams, shown on Page 4, give the dimensions and mounting hole positions for each model. Ensure that:
•The orientation of the unit has the ‘TOP’ uppermost.
•The location allows adequate front access.
•You can view the touchscreen.
•Do not install other equipment that generates significant heat close to the soft starter.
Requirements for an Enclosure
For a typical industrial environment, an enclosure would provide the following:
•A single location for the unit and its protection/isolation switch-gear
•The safe termination of cabling and/or busbars
•Means to effect proper air flow through the enclosure
Enclosure Ventilation
When fitting VMX-agility
TM
into a cabinet, ventilation must be provided if the heat output of the unit is
greater than the cabinet will dissipate. Theheat dissipated can be approximated with the formula:
Starting
Watts (agility) = start current(A) x start time(s) x number of starts per hour/1800
Running
Watts (agility) = 0.4 x running amps
Use the following formula to determine the fan requirement. An allowance has been incorporated into the
formula so that the figure for Q is the air delivery in the fan suppliers’ data.
Q = (4 x Wt/ (Tmax-Tamb))
Q = Volume of air (cubic metres per hour-m3/h)
Wt = Heat produced by the unit and all other heat sources within the enclosure (Watts) Tmax = Maximum
permissible temperature within the enclosure (40°C for a fully rated agility™)
Tamb = Temperature of the air entering the enclosure (°C) [to work in CFM, substitute °F for °C. Q is now in CFM]
Altitude Derate
Altitude above sea level 1000m (3281ft). Above 1000m de rate by 1% of agility i.e. per 100m (328ft) to a
maximum altitude of 2000m (6562ft).
Ambient Temperature Derate
-20°C (-4°F) to 40°C (104°F). Above 40°C de-rate linearly by 2% of agility i.e. per °C to a maximum of 60°C (140°F).
