Is PF the same thing as Cosφ?

(F. S. – Germany)

NO. PF and Cosφ are two different quantities. Cosφ only measures the phase displacement between the power supply and the power draw. PF (Power Factor) measures phase displacement plus all the other factors that generate reactive power in the system. PF is the most important parameter for evaluating the efficiency of any system that consumes electrical energy. In fact it is the only one that provides a complete measurement of a system’s efficiency in using the electrical power drawn from the AC power supply. (Cosφ only provides a partial measurement).

What does PF=1 mean?

(M. W. - United Kingdom)

A system with a value of PF=1 (power factor of unity) is a system that draws from the AC supply line only the exact amount of power it needs to perform its function. This means that systems with a PF of less than 1 draw more power than is theoretically needed for the purpose in hand. (For example a system with PF=0.65 draws about 54% more power than is theoretically necessary.) This extra power is transformed into reactive power and returned to the grid.

Is energy saving the only benefit of green@wave technology or are there additional benefits?

(P. V. - Netherlands)

First of all, the benefits in terms of energy saving are not restricted to the individual power source, but extend to the entire production department and to your company’s electrical energy distribution network in general. (See the 9 good reasons for choosing green@wave). On top of this, green@wave technology also offers major advantages in terms of welding performance. green@wave power sources deliver a constant and noise-free current to the welding arc, permitting perfect control over welding parameters as well as total repeatability. The result is unrivalled welding quality and productivity. Green@wave power sources can also perform advanced and sophisticated welding processes like pulsed arc and AC/DC welding.