... .Good environmentally-friendly protection system 1. The standard protection for HL series generator is IP232. Windings are insulated to class H3 ... run under 150% rated speed (2250r/min.) for 2min,4. HL generators are provided with a 2/3 winding pitch as ... wave factor THF≤2%, telephone effedtive factor of TIF≤50 HL Series 50HZ Three-Phase(or Single Phase) Brushless Synchronous Generator ...