c. Operation & Power Consumption
- VVVFD system achieved Unity P.F, No capacitor bank/APFC requirement in
the system, - With VVVFD System will get operational advantage of speed precise control
& the actual power consumed as per speed. - 98% Efficiency of the VVVFD system will get & having 2% Inverter loss with
the system - Over speed of additional 10% can be achieved with VVVFD system, Resulting
Gain of Production
12.4 Comparison of Conventional System v/s VVVFD Concept
S. N. Particulars Conventional System VVVFD Concept
1 Initial Investment
I Type of Stator IMCC-DOL feeder with pro-V VVVFD
Ii Mechanical Damper Motorised or Manual Damper No damper requirement
Iii IMCC DOL/RDOL Feeder
01 no DOL for FAN & 01 No
RDOL for damper is required
- IMCC with pro V
01 no SFU Required
for VFD
Iv Local Push button Station 02 nos LPBS required for FAN & Damper 01 no LPBS required for FAN
V Power Cable
Higher Power cable for
Motor & damper as per
hardware’s
Lower size Power
cable required as
per hardware’s
Vi Control Cable
7x1.5 & 4x1.5 sq.mm control
cable required for Fan &
Damper control
7x1.5 sq.mm control
cable required
2 Power Consumption
I Speed Control & Reduction Not Possible
Possible 10-110%
possible & getting
Power Saving
Ii Energy consumption as per process requirement
High Energy consumed
as per motor rated KW/
Damper operation Loss
irrespective of Process
requirement
Actual Energy
consumed on
account of Air
Flow & air Pressure
as per Process
requirement.
Iii Losses 5 to 7.5 % of power loss on account of damper
2 % o f r a t e d p o w e r
loss across the
devices
Iv System Power Factor Average 0.85 P.F Nearer to Unity P.F.