Slow Speed 50 Ton Electric WPerfect Steerable Transfer Carth. Slow speed 50 ton electric wPerfect Steerable Transfer Carth parameters: Loading capacity: 0.5~200 t. Rope capacity: 20~3600 m. Working speed: 5~20 m/min; (single speed and dual speed) Power supply: 220-690V, 50/60HZ, 3Phase. Get A Free Quote.