Table 1-6. Electrical Performance Characteristic Parameters AC Utility (Class 2)
Characteristic parameter
a.
Voltage characteristics
1.
Regulation (%)
2.
Steady-state-stability (variation)
(a) Short term (30 seconds)
(b) Long term (4 hours)
3.
Transient performance
(a) Application of rated load
(1) DIP (%)
(2) Recovery (seconds)
(b) Rejection of rated load
(1) Rise (%)
(2) Recovery (seconds)
(c) Application of simulated motor load (twice rated current)
(1) Dip (%)
(2) Recovery to 95% of rated voltage (seconds) (Note 1)
4. Waveform
(a) Maximum deviation factor (%)
(b) Maximum individual harmonic (%)
5. Voltage unbalance with unbalanced load (%) (note 2)
6.
Phase balance voltage (%)
7.
Voltage adjustment range
(a) 50 Hz (120/208 volts)
50 Hz (240/416 volts)
(b) 60 Hz (120/208 volts)
60 Hz (240/416 volts)
b.
Frequency characteristics
1.
Regulation (%)
2.
Steady-state-stability (varition) (bandwidth %)
(a) Short term (30 seconds)
(b) Long term (4 hours)
3. Transient performance
Value
3
2
4
20
3
20
3
40
5
5
2
5
1
190 to 213 volts
380 to 426 volts
197 to 240 volts
395 to 480 volts
3
2
3
Test method
MIL-STD-705
608.1
608.1
608.2
619.2
619.2
619.2
619.2
619.1
619.1
601.1
601.4
620.2
508.1
511.1
511.1
608.1
608.1
608.2
1-52
