Benefit No. 1
60% 70% 80% 90% 100%
600 KW 600 KW 600 KW 600 KW 600 KW
800 KVAR 612 KVAR 450 KVAR 291 KVAR 0 KVAR
1000 KVA 857 KVA 750 KVA 667 KVA 600 KVA
POWER FACTOR
REAL POWER
REACTIVE POWER
TOTAL POWER
60% 70% 80% 90% 100%
360 KW 420 KW 480 KW 540 KW 600 KW
480 KVAR 428 KVAR 360 KVAR 262 KVAR 0 KVAR
600 KVA 600 KVA 600 KVA 600 KVA 600 KVA
POWER FACTOR
REAL POWER
REACTIVE POWER
TOTAL POWER
Less Total Plant KVA for the
Same KW Working Power
Dollar savings are very significant in areas where utility billing is affected by KVA usage.
Example: 600 KW working power vs KVA required
Benefit No. 2
More KW Working Power for the
Same KVA Demand
Released system capacity allows for additional motors, lighting,
etc. to be added without overloading existing distribution equipment.
Example: 600 KW demand vs available KW
Benefit No. 3
Improved Voltage Regulation Due to
Reduced Line Voltage Drop
This benefit will result in more efficient performance of motors and
other electrical equipment.
Example: Fig. 2 depicts what happens to the full load speed and
starting torque of a motor at various levels of rated voltage.
Fig. 2
KW
100
KW
100
KW
100
KW
100
KW
100
KVAR
48
KVAR
75
KVAR
100
KVAR
133
Benefit No. 4
Reduction in Size of Transformers,
Cables and Switchgear in New Installations
- Thus Less Investment
Example: Fig. 3 represents the increasing size of conductors
required to carry the same 100 KW at various power factors.
Fig. 3
KVA-100 KVA-111 KVA-125 KVA-141 KVA-167
P.F.- 100% P.F.- 90% P.F.- 80% P.F.- 70% P.F.- 60%
Benefit No. 5
Reduced Power Losses in Distribution Systems
Since These Losses are Proportional
to the Square of the Current.
Since the losses are proportionate to the square of the current, the
following formula applies:
Example: Improve power factor from 65 percent to 90 percent
Per Cent
Speed
Per Cent
Torque and
Full Load Current
Per Cent Rated Voltage
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