... .SERVICE ENVIRONMENT2.1 Power supply: Single phase, 220 V, AC, 50 Hz (or Three phase 380 V, AC,50 Hz. Other specific specifications ... with electric braking), Minimum duty factor 25%, Maximum operations 1200 times/hour1.7 Protection: IP 553. MAIN PERFORMANCE PARAMETERS ... times of 320 cycles/ hour, Y: single phase, without letter: three phases. Other specific specifications are based on contract or ...