Parameter | UoM | Value |
Power | kVA | 250 |
Number of phases | - | 3 |
PW voltage | kV | 6.0, 6.3, 10.0, 10.5 |
PW voltage control steps | % | ±2х2.5 |
VW voltage* | kV | 0.4; 0.44; 0.475; 0.58; 0.6; 0.69; 0.765 |
Winding arrangement and phase-displacement group | - | Y/Y-0; Y/D-11; D/Y-11; D/D-0; Y/Yn-0; D/Yn-11 |
Heat resistance class of the transformer as per GOST 8865-93 | - | H (180 °С) |
Heat resistance class of the insulation as per GOST 8865-93 | - | 200 (200 °С) |
Winding material | - | Cu |
Type of cooling system | - | Air Natural Vertical cooling channels in valveside and power windings. |
Insulation type | - | Air-barrier monolith |
Conductor insulation material | - | Polyimide-fluoroplastic film with two layers of fiber glass filament |
Losses ХХ | W | 900 |
Current ХХ | % | 1.5 |
SC losses (at t=115 °С) | W | 4000 |
SC voltage | % | 4.0 |
Climatic version: | - | U; UHL; T |
Placement category | - | 2; 3; 4 |
Protection rating according to GOST 14254-96 | - | IP21; IP31 |
Technological advantages:
- Winding is protected using glass-containing tapes impregnated in the compound.
- Monolithic windings with a triple impregnation-curing cycle in the compound with increased concentration of silicon.
- Pressing of the yoke with yoke beams pulled together with studs.
*Other valveside winding voltages are possible as per the Customer's requirements