Rectifiers & D.C. Power Supply Systems
High power rectifier sets for electrothermics
Main specification
| Parameter name
|
Value | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For melting metals: |
D.C. arc furnaces |
Arc vacuum and skull furnaces | ||||||||||
| Fe, Al, Cu, Ni, Ti, Co
| Ti, Nb, Mo, Hf, Zr
| |||||||||||
| Primary voltage, kV | 6 ÷ 220
| 6 ÷ 35
| ||||||||||
| Rectified current, kA | 3 ÷ 120 | 4,5 ÷ 120 | ||||||||||
| Rectified voltage, V | 50 ÷ 150 | 200 ÷ 1150 | ||||||||||
| Type of rectifier | thyristor | |||||||||||
| Rectification circuit | bridge (multibridge) | |||||||||||
| Pulse number | 6, 12 | |||||||||||
| Cooling of thyristors | – distilled, deionized water
– non – freezing liquid | |||||||||||
| Accuracy of current maintaining, % | ± 1 | |||||||||||
| Voltage regulation
coarse fine | by no – load, on – load devices of transformer
by thyristor firing angle | |||||||||||
| Power factor (without compensation), not worse | 0,9 | |||||||||||
| Cooling of power semiconductors | non – freezing liquid – water
non – freezing liquid – air | |||||||||||
| Installation | – indoors
– outdoors | |||||||||||
| Ambient air temperature, °C | from -45 to +45 | |||||||||||
Delivery set:
- switchgear device 6 ÷ 220 kV;
- rectifier set;
- d.c. meter;
- smoothing filters.
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