Hydrogenerators - Features
Hydrogenerators - general characteristics
All Hydrogenerators and generator-motors have indirect air cooled stator and rotor windings. Stator core is direct cooled with air. Both axial and radial self-ventilating configurations are adopted.
According to generator arrangement, the rotor is supported with guide, thrust, combined thrust-guide bearings or pedestal bearings in horizontal morphology.
| Frequency Hz |
Speed
RPM |
Coupling |
Mounting |
Ventilation |
| 50 - 60 |
60 ÷ 166 |
F - K |
D |
R - AD |
| >166 ÷ 375 |
F – K - RTP |
B – D - E |
AD –- M |
| >375 ÷ 1000 |
P - F - RTP |
A – C –- E - H |
| Coupling: |
K = Kaplan
F = Francis
P = Pelton
RTP = Reversible Turbine Pump |
| Mounting arrangement: |
Vertical |
A = IM8425
B = IM8415
C = IM8225
D = IM8205
E = IM8025 |
| Horizontal |
H = IM7325, IM7326, IM7315, IM7316 |
| Method of cooling: |
IC 9 A1 W7 - IC 8 A1 W7 – IC 2 A1 – IC 3 A1 (IEC 60034-6) |
| Ventilation: |
AD = Adjustable fan blades pitch
R = Rim ventilation
M = Motor fans (reversible) |
| Protection degree: |
Max. IP 54 (IEC 60034-5) |
| Excitation: |
static (standard) or brushless |
| Thermal insulation class: |
F; thermally loaded only to class B |
| Coolers arrangement: |
- around the frame
- in the foundation |
| Installation: |
- in building, cavern
- pit or floor mounted |
|
