3.0 MW rated power, 110 metre rotor. A workhorse of the mid-to-late 2000s and still running in numbers across Türkiye. The generation before the V126, and the last of the Vestas 3 MW machines built around a parallel-axis gearbox.
Where it sits in the series
Feature
V90
V110
V126
Rated power
2.0 MW
3.0 MW
3.3 MW
Rotor diameter
90 m
110 m
126 m
Swept area
6,362 m²
9,503 m²
12,469 m²
Blade length
43.5 m
53.5 m
61.5 m
Gearbox type
Parallel-axis
Parallel-axis
Planetary
Gearbox oil volume
600 L
700–750 L
850+ L
Specifications
Parameter
Value
Rated power
3000 kW
Rotor diameter
110 m
Swept area
9,503 m²
Blade length
53.5 m
Hub height (typical)
80 / 100 / 120 m
Rotor speed
6.9–12.6 rpm (variable)
Cut-in
3.5 m/s
Rated wind speed
~12.5 m/s
Cut-out
25 m/s
Gearbox
Parallel-axis, three stage, ratio ~1:81
Generator
DFIG with partial converter
Cooling
Active, thermostatically controlled
Model-specific systems
Parallel-axis gearbox
Layout: successive parallel shaft stages to an overall ratio near 1:81.
Strengths: mechanically simple and forgiving; stress is spread across conventional meshes rather than concentrated as in a planetary set.
Costs: heavier and noisier than a planetary box of the same rating.
Oil: 700–750 L, nominal 45–65 °C, alarm above roughly 75 °C.
Pitch and yaw
Pitch motors: 15–18 kW, maximum rate around 5–7 °/s — slower than the V126.
Yaw motors: 7–10 kW; slewing bearing about 3500 mm.
Alignment tolerance: ±3–5°, wider than the ±1° of later machines, with less vane sensor redundancy.
Assembly stages (16–17 days)
Days 1–2: site preparation, crane pad and tooling checks, safety briefing.
Days 3–8: sectional tower erection to 80–120 m.
Days 9–10: nacelle lift, 550–600 t. Gearbox alignment is more sensitive here than on planetary machines.
Days 11–14: blade installation, 53.5 m blades at roughly 20 t each, root flange bolting.
Days 15–16: electrical and cooling — converter cabling, coolant fill and bleed, SCADA.
Day 17: commissioning — grid synchronisation, pitch calibration, performance test.
Maintenance schedule
Task
Interval
Note
Visual inspection
Monthly
Blades, nacelle, tower, gearbox air ducts
Gearbox oil sampling
12 months
Metal analysis trend is the key output
Oil and hydraulic filter change
24 months
Parallel-axis boxes generate more particulate
Cooling system check
6 months
Coolant level, fan test, radiator cleaning
Converter capacitor check
24 months
Ripple voltage and power electronics health
Pitch sensor calibration
36 months
Limited vane redundancy makes this matter
Yaw bearing greasing
12 months
Inspect purged grease for metal
Gearbox borescope inspection
60 months
Tooth flank and bearing condition
Faults seen most
Shaft seal oil leakage: the defining V110 issue, typically appearing after 8–12 years and developing slowly enough to pass unnoticed. Mechanism worked through in Case 02.
Gear pitting: from sustained overload combined with poor oil circulation.
Converter thermal problems: including the intermittent, power-dependent kind described in Case 05, which was found on a V110.
Pitch asymmetry: with less sensor redundancy than later machines, a single failed sensor has more effect.
Yaw bearing drag: grease ageing raises preload and drives yaw motor current up.