... brushless9) Voltage regulation: automatic10) 1.0% voltage regulation (max.) in static conditions11) Protection class: IP 22 or IP23Control system: 1 a ... classHVoltage regulationAVRCONTROL PANELV-meter, A-meter, Frequency meter, circuit breaker, transfer switch, temp.and pressure gauges, indicating lamp, hour meter, key starter ...