thePetroStreet

One query that you can forward to the vendor regarding the utility of the VFD is that since you need to run the system at 2 predefined speeds only, you can utilize a 2-speed motor instead. See how he justifies the use of this VFD and probably that'l answer your question

Normally VFD's are sized according to the rating of the motor, but this may vary depending upon your vendors design basis ( service factor, etc). Post the complete specs of your motor and VFD (Name Plate Data, model, datasheet(If any)) so that basis for this design can be determined.

IEC-61850 is regarding functional safety of electrical / electronic equipment. Just drop ur email nd il send it 2 u. Here's a basic guide:

Lighting Illumination is usually measured in Lux (unit). Lighting studies are carried out before setup of a facility to ensure adequate illumination at working plane of employees and also depending on whether its manned or not. Common softwares used for this purpose are Calculux (Old) and DialLux ...

Here is a good guide for understanding forms of separation.