Between 0.8 and 1.0 lagging and unity
From no load to full load
At speed droop variation up to 4.5%

Frequency Adjustable Ratio:
Change load from 0-100%, within 1.0% (electric speed regulator), within 4.5%(mechanical speed regulator)

Frequency Undulation:
Load from 0-100%, Frequency undulation within 0.25%
No load wire volts max undulation ration within 1.8%
There phase balanced load in the order of 5%

Effect factor of telecom:
TIF better than 50
THF to BS4999 Part 40 better than 2%

Electromagnetism:
In compliance with BS800 and VDE levels G and N
Noise level (at 7m): ¡Ü75 dB(A)