Freeknow said:
Hi dears
I have 70 Unit of A/C unit 3phase 220 Current rated as in name plate is 23.5. My Qusi I want to total load for these units and feeder size, condsider ambeint tempreture is 55 degree.
With best
Dear ;
Please confirm the following points to be able to do the calculation :
– Supply : 3 Phases – 220V : is this value between 2 phases ?
– The rated current for each unit is : 23.5 A
– The Power Fcator ” Cos φ ” for unit ?
– Haw many units will be in working in the same time ? ( to define the Utilisation Factor – Ku )
– What kind of cables you use normally ” PVC or XLPE ” ? Cu or Alu ?
– What Methode of installation you will use ” Unperforated or Perforated cable tray, Ladder, … ” ?
– Are you sure that the ambiant temperature inside where the cables will be installed is ” 55 °C ” ?