De acuerdo al contexto surge que es un motor eléctrico. Todos los motores eléctricos son fuertemente inductivos lo que provoca una baja en el rendimiento. En este caso en concreto la merma se ubica entre 53% y el 60%.

http://www.tvss.net/pq/pf.htm
Power factor is the ratio between the KW (Kilo-Watts) and the KVA (Kilo-Volt Amperes) drawn by an electrical load where the KW is the actual load power and the KVA is the apparent load power. It is a measure of how effectively the current is being converted into useful work output and more particularly is a good indicator of the effect of the load current on the efficiency of the supply system.
All current flow will causes losses in the supply and distribution system. A load with a power factor of 1.0 (100%) results in the most efficient loading of the supply and a load with a power factor of 0.5 (50%)will result in much higher losses in the supply system.
Many inverters are quoted as having a power factor of better than 0.95 when in reality, the true power factor is between 0.5 and 0.75. The figure of 0.95 is based on the cosine of the angle between the voltage and current but does not take into account that the current waveform is discontinuous and therefore contributes to increased losses on the supply.