Conditions

Voltage (per unit)

Frequency (Hz)

Load variation (1st stage)

0.85 to 1.1

49.8 to 50.1

Load variation (2nd stage)

1.0 to 1.3

50.1 to 50.4

Load variation (3rd stage)

0.85 to 1.1

49.6 to 50.0