prepared by Jamilah Abbas Building Services Eng, JKA PSA

1. WHAT IS POWER FACTOR

2. KW Working Power ( actual power, active power or real power) It is the power that actually powers the equipment and performs useful work

3. KVAR Reactive Power It is the power that magnetic equipment ( transformer, motor and relay) needs to produce the magnetizing flux

4. KVA Apparent Power It is the vectorial summation of KVAR and KW

6. POWER FACTOR PF = KW / KVA PF = KW / KW + KVAR

8. KVA KVAR θ

9. PF = KW / KVA = COS θ KVAR/KVA = SIN θ KVA = √ KW2 + KVAR 2

10. WHAT CAUSES LOW POWER FACTOR Since power factor is defined as the ratio of KW to KVA What causes a large KVAR in a system? INDUCTIVE LOADS Transformers Induction motors Induction generator High intensity discharge lighting