Artesis e-PCM for Wind Farms: Turbine Monitoring Without Nacelle Sensors
Main bearings, generator and drive train: how e-PCM reads generator output to cut nacelle visits — 20-turbine case study, 14-month ROI.
Article available in Russian
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Every nacelle climb on a wind farm costs crane time, weather windows, downtime and safety exposure. Yet most unplanned stops trace to main shaft, generator and gearbox bearings — exactly where traditional vibration needs expensive machine-mounted sensors.
Artesis e-PCM monitors the prime mover and generator from generator output current and voltage — no shaft sensors in the nacelle. Install at tower base or bottom cabinet; feed Artesis IoT or site SCADA.
What e-PCM sees on a WTG
Main shaft
- Main bearing wear
- Rotor imbalance
- Misalignment to gearbox/generator
Generator
- DE/NDE bearing degradation
- Stator/rotor winding issues
- Eccentricity and air-gap problems
Gearbox / drive (indirect)
- Gear wear and misalignment via drive signature
- Blade issues — indirect load/torque clues
Auxiliaries in the tower
Pitch hydraulics pumps, cooling fans → e-MCM at MCC, not e-PCM.
Vibration vs e-PCM on wind
| Factor | Nacelle vibration | e-PCM |
|---|---|---|
| Install | Height, crane | Tower base cabinet |
| Sensor upkeep | Frequent climbs | Minimal |
| Generator electrical | Weak | Full |
| Cabling | Long analog runs | Ethernet/Modbus |
| 20+ turbine fleet cost | High | Lower per unit |
e-PCM does not replace every CMS use case, but delivers continuous trending where climbs are the bottleneck.
Case: 20 × 2.5 MW
Problem: bearing trips, 40 service visits/year, high failure cost.
Solution: e-PCM on each turbine + central SCADA + Artesis cloud.
| Metric | Before | After |
|---|---|---|
| Unplanned stops | 8/year | 1/year |
| Service visits | 40/year | 20/year |
| Failure cost | ~$200K/year | ~$25K/year |
| Availability | 94% | 98.5% |
| ROI | — | 14 months |
Architecture
WTG → generator output → CTs + voltage → e-PCM (tower base)
↓
Modbus TCP / Ethernet → SCADA / Artesis IoT
Same tech, other e-PCM assets
| Asset | Guide |
|---|---|
| Wind | this article |
| Hydro / steam | Turbo-generators |
| Gas | Gas turbines |
| DGS | Diesel gensets |
| All uses | e-PCM navigator |
Fleet PdM stack
| Asset | Product |
|---|---|
| Generator + main shaft | e-PCM |
| Pitch hydraulics, tower fans | e-MCM |
| Route survey | AMT Pro |
| Multi-site | Artesis IoT |
Summary
Artesis e-PCM shifts wind O&M from reactive bearing swaps to condition-based care: per-turbine trends, fewer climbs, documented ROI.
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KEG TRK — official Artesis distributor in Kazakhstan. Contact