technical NOTES

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.