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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