The RS9/9.3 on-load tap changer is a single and three phase tap changer with a varied range of voltage and current variants. The RS9/9.3 tap changer is the most widely used type of all Elprom tap changers and the most popular choice for transformers of the medium power range.
The RS9/9.3 is a reliable, low maintenance tap changer well-suited for various applications in the industry and transmission and distribution grid. It is a highly customizable solution that is designed, manufactured and tested according to the requirements of the International Standard IEC 60214-1.
| Rated current single phase (A) | 200, 400, 630, 800, 1200 and 1600 - single phase design for all connection diagrams |
| Rated current three phase (A) | 200, 400, 630 - three phase design for regulation at neutral point |
| Rated voltage (kV) | 41,5; 72,5; 123; 170; 245 and 300 |
| Step voltage (V) | Up to 4000 |
| Connection diagrams | With and without coarse and reverse change-over selector |
| Number of steps | Up to 35 |
| Carrying flange shape | Round or elliptic |
| Standard | IEC/IEEE 60214-1 |
| Selector switch insulation level | K, L, M, N and P |
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