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Tanaka Electric
Tanaka Electric
The 140MVA, 35KV arc furnace transformer is a large-capacity, medium-high voltage industrial-grade special transformer. Its core function is to provide stable and adjustable high-power electrical energy for arc furnaces, generating high-temperature electric arcs through electrodes to melt metal raw materials. Based on its capacity (140MVA, corresponding to an arc furnace with a nominal capacity of approximately 120-150 tons) and primary side voltage (35KV, compatible with industrial medium-voltage distribution networks), its application scenarios are highly focused on the field of large-scale heavy industry metal smelting and processing.
| Parameter Item | Technical Specification |
|---|---|
| Operating Voltage | 33kV ± 5% |
| Frequency | 50Hz ± 1% |
| Operation | Continuous |
| Rated Capacity | 140 MVA + 20% Overload |
| Rated Primary Current | 2449.4 A (+ 20% Overload) |
| Insulation Level (MV/LV) | Um: 52kV / 3.6kV; BIL: 250kV / - |
| Protection Level | IP54 |
| Vector Group | Dd0 |
| Secondary Connection | Open Delta |
| Secondary Current | 80.829 KA (+ 20% Overload) |
| Secondary Voltage Range | 1100 - 1000 - 620 V |
| Short-circuit Impedance | 8% (at LV max. Voltage) |
Suitable for 120-150 ton large-scale arc furnaces, core to modern "short-process steelmaking" for melting scrap steel.
