SRG Series
Electroslag remelting (ESR) furnaces are used for high quality alloy production with specific features (e.g. electric steel).In course of remelting process a consumable metal electrode is lowered into molten slag layer which in it’s turn melts the metal electrode.
TET ESTEL power supply units for ESR furnaces are designed to regulate power and stabilize alternating current flowing through a liquid slag layer. Industrial frequency power supplies are built on thyristor controllers consisting of antiparallel connected thyristors with pulse-phase control.
To compensate for reactive power and increase the power factor as well as to reduce the harmonic distortion factor of the consumed current, capacitor banks maintaining the optimal power factor and controlled by electronic keys are installed at the controller input.
Power supply microprocessor control system enables automatic control of the technological variables (current stabilization at a given level) and dynamic protection from over-current.
Network frequency power source advantage is cost affordability of the solution compared to the low frequency option.
| Rated power max. output, kW | from 500 to 8800 |
| Rated current max. output, kA | from 4 to 65 |
| Rated output voltage, V | from 80 to 135 |
| Rated input frequency, Hz | 50 (60) |
| Rated output frequency, Hz | 50 (60) |
| Output current range, kA | from 1 to rated value |
| Output voltage range, V | from 0 to rated value |
| Current stabilization accuracy, % | 2,5 |
| Power input type | 1 phase AC, LV or MV grid |
| Control | Manual local control |
| Remote control from the furnace operator’s control panel from the automatic furnace control system | |
| From the automatic furnace control system |
