Ring current collectors are designed to supply a DC voltage up to 440V AC and DC voltage up to 660V, frequency 50 Hz and 60 Hz from a fixed source to the movable parts of the pivoting or rotating mechanisms for cranes.
Series K-3100
| Type of ring susceptor | Diameter column, mm | Number rings, pieces | Current carrying load on the ring A | Power protection | Weight, kg | |
| PV 100 % | PV 40 % | |||||
| К 3103 | от 60 до 100 | 3 | 150 | 250 | IP00 | 23 |
| К 3104 | 4 | 25 | ||||
| К 3106 | 6 | 30 | ||||
| К 3109 | 9 | 37 | ||||
| К 3110 | 10 | 39 | ||||
| К 3112 | 12 | 44 | ||||
| К 3115 | 15 | 51 | ||||
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