LTW77 800 / 850 / 1000 kW

LTW77 800 / 850 / 1.000 kW

LTW77 800 / 850 / 1.000 kW

Design Data

Hub Height:
61,5 / 65 / 80 m
Rated Power:
800 / 850 / 1.000 kW
Tower:
steel
Cut-in wind speed:
3 m/s
Cut-out wind speed:
25 m/s
Yaw control system:
Active, electrical
Wind Class:
IIA/IIIA+

Rotor

Number of blades:
3
Rotor diameter:
76,6 m
Swept area:
4.608 m²
Rotational speed:
18 / 18 / 18 rpm
Tip speed:
72 / 72 / 72 m/s
Blade material:
GFRP - UP
Power and rotor speed control:
Active pitch control

Generator

Type:
Permanent Magnet Direct Drive Synchronous Machine
Stator Winding:
Modular coils with tooth concentrated winding, exchangeable
Rotor Topology:
Modular Permanent Magnets with flux concentration, exchangeable
Speed Range:
Variable Low Speed Machine
Protection class:
IP55

Control & Safety System

Main brake:
Aerodynamic, indipendent pitch control
Service brake:
Electrical
Rotor lock:
Hydraulic
Remote control:
Leitwind - SCADA

Power Electronic

Converter Type:
4Q full power - 3 phase IGBT
Converter rated voltage and frequency (grid-side):
690 V ±10%, 50-60 Hz ±5%
Converter power factor (grid-side):
0,95 ind - 1 - 0,95 cap
for reactive power compensation control, grid voltage control capability
Cooling:
air cooled rotor, air cooled stator
Power quality and Grid codes:
High quality output power in accordance with major grid code requirements. Integration into various grid systems worldwide.

Compliant with:
- Grid codes CEI 0-16, TERNA, e-on (incl. LVRT), others
- Power quality measurements according to IEC 61400-21
- Emission limits IEC 61800-3
Arrangement:
single or multiple converter

Power curve

Wind speed (m/s)

Electrical power(kW)

(m/s) LTW77 800 LTW77 850 LTW77 1.000
3 24 24 24
4 69 69 69
5 150 150 150
6 269 269 269
7 433 433 433
8 605 617 617
9 736 768 839
10 788 834 952
11 800 850 1.000
12 800 850 1.000
13 800 850 1.000
14 800 850 1.000
15 800 850 1.000
16 800 850 1.000
17 800 850 1.000
18-25 800 850 1.000

CERTIFIED PRODUCTS

Please visit our Certificates page for an overview of all certified LEITWIND products.