... , or three phase Specifications Brush Generator ST/STC AVR 1)for generator or alternator 2)low price,best quality 3)single phase ... Phase: 1/ 3 phase Specifications Brush ST AVR 1. Harmonic excitation, 1 phase brush type generator 2. Factory direct sales, 1 year ... warrantyBrush ST AVR Automatic voltage regulator ST AVR(110V, 220, 230V, 380V ...