- Voltage regulation: around ± 0.5%.

- Voltage supply/sensing range 85 to 139 V (50/60 Hz)

- Rapid response time (500 ms) for a transient voltage variation amplitude of ± 20%

- Voltage setting P1

- Stability setting P2.

- Power supply protected by 8 A fuse, slow-blow action (tolerates 10 A for 10 s)

- Frequency: 50 Hz with ST3jumper - 60 Hz without ST3 jumper

- Factory-set underspeed protection P3.