Pump Affinity Laws:

• Q1/Q2 » N1/N2: capability (or flow) and speed is proportional.

• P1/P2 » (N1/N2)³: power consumption and speed cubic is proportional.

According to Pump Affinity Laws, frequency or speed reduced to 50%

=> refrigerating capability reduced to 50%

=> electric consumption reduced to (50%)³ = 12.5%.

Energy saving application:

• If speed reduced to 83.3% (from 60 Hz to 50Hz), power consumption reduced to 57.9% (50/60)³.

• If speed reduced to 66.7% (from 60 Hz to 40Hz), power consumption reduced to 29.6% (40/60)³.

• If speed reduced to 50.0% (from 60 Hz to 30Hz), power consumption reduced to 12.5% (30/60)³.

Our Etern Energy Saving System (E2S2) saves energy by avoiding large starting current,

and lowing down the running frequency when possible.