Dieser Leitfaden ist derzeit auf Englisch verfügbar.
Technology / Engineering guide
Wind Turbine Start-Up, Cut-In & Operating Wind Speeds
Wind-speed labels can describe different mechanical and electrical events. Keep rotor movement, the start of measured electrical generation, rated output and stopping conditions separate before using a low-wind number in a product comparison or energy assessment.
Ask what happened at the stated wind speed.
A rotating rotor, a voltage reading and power accepted by a project load do not establish the same result. The equipment configuration and measurement boundary must remain with the speed claim.
01 / Rotor start-up
Describe the beginning of rotation accurately.
The DOE glossary distinguishes start-up wind speed, when the rotor begins to spin, from electrical cut-in.
The DOE glossary distinguishes start-up wind speed, when the rotor begins to spin, from electrical cut-in. Rotor start-up is a mechanical observation. It does not by itself state useful electrical power, time-averaged energy or load-supply continuity.
FD14-50KW documentation gives 2.5 m/s as rotor start-up. Retain that label and its model-specific scope; it is not a verified electrical cut-in value. No equivalent numerical start-up threshold is established here for FD5-5KW, FD7.5-10KW, FD10-20KW or FD12-30KW.
02 / Electrical cut-in
Identify the first electrical output being described.
Cut-in refers to the onset of electrical generation.
Cut-in refers to the onset of electrical generation. Ask where output was measured and what criterion identifies that onset in the applicable evidence. Generator-terminal output, converter output and energy accepted at a load or grid connection can describe different boundaries.
A visible voltage or controller status is not automatically a measurement of delivered power. Record the instruments, electrical quantity and operating state used in the report. Do not convert a rotor start-up value into electrical cut-in by changing its heading or placing it in a common specification row.
03 / Rated conditions
Keep rated output separate from a start threshold.
A rated wind-speed label relates to achieving the stated rated output under its defined conditions.
A rated wind-speed label relates to achieving the stated rated output under its defined conditions. The capacity label is not a statement that the turbine delivers that power at every wind speed above start-up. Obtain the configuration, conditions and output boundary supporting the rated-output record.
Use the power-curve guide to review the available output information across the range. This page supplies no rated wind-speed number for the current models and no assumed common curve based on their electric-yaw feature.
04 / Stopping & limits
Separate generation cessation from structural suitability.
A cut-out label describes the wind speed at which electrical generation ceases in its stated operating context.
A cut-out label describes the wind speed at which electrical generation ceases in its stated operating context. The reason, equipment state and restart conditions still need the applicable control documentation. A stopped rotor and ceased electrical output should not be treated as interchangeable observations.
A maximum operating, survival or design-condition claim answers a different question and requires its own definition and evidence. Do not use a cut-out value as a verified structural survival limit, or a high-wind number from one configuration as a control setting for another.
05 / Evidence record
Give each speed claim its own source and conditions.
Create a speed-label register with model, equipment revision, event definition, reported value, wind-measurement location, output boundary and source reference.
Create a speed-label register with model, equipment revision, event definition, reported value, wind-measurement location, output boundary and source reference. Add averaging or observation criteria where the evidence provides them. Keep unavailable fields as unknown rather than using a competitor’s number.
For FD14-50KW, distinguish current electric-motor yaw evidence from historical hydraulic-yaw records. If the available test refers to an earlier arrangement, identify that limitation before attaching the result to a current claim. The report review helps retain that distinction.
06 / Project relevance
Use output evidence and site timing for the decision.
A low rotor start-up speed can be discussed as a documented observation, but it does not quantify useful low-wind energy.
A low rotor start-up speed can be discussed as a documented observation, but it does not quantify useful low-wind energy. A project assessment needs applicable electrical performance information, site wind distribution or timing, acceptance conditions and any relevant auxiliary-energy boundary.
Ask MARSTON for the evidence applicable to the chosen model and proposed equipment. Compare explicitly labelled events through the agreed evidence plan; do not promise an unverified low-wind yield, universal wind-speed threshold or commissioning setting from this guide.
Continue the review with 5 kW vs 10 kW Wind Turbines: Small-Load Expansion Review.
Continue the review with 30 kW vs 50 kW Wind Turbines: Configuration Evidence Review.
Continue the review with Wind Turbine Factory & Site Acceptance: Evidence Planning.
Further project guides: Wind Generator Torque, Speed & Power: Mechanical Boundaries · Wind Turbine Tip Speed Ratio: Rotor Radius, RPM & Wind Speed.
General background: DOE Small Wind Guidebook: Wind-Speed Terminology. These references explain industry concepts; they are separate from the applicable MARSTON product and project documents.
Prepare the information for this review.
Use the checklist to organise the project information. Mark unavailable items and retain document references.
| Review item | Information to provide | Purpose |
|---|---|---|
| Rotor start-up | Model-specific beginning-of-rotation observation | Keep mechanical motion distinct from output. |
| Electrical cut-in | Onset criterion, measurement point and configuration | Identify the electrical event being claimed. |
| Rated output | Capacity, wind condition and evidence reference | Interpret the stated rating. |
| Stopping & limits | Ceased-generation state and separately documented limits | Avoid combining control and structural claims. |
| Speed register | Revision, measurement location, method and unknown fields | Preserve applicability of each number. |
Engineering questions.
Does rotor start-up equal electrical cut-in?
No. Start-up describes rotation; cut-in describes the onset of electrical generation in its specified evidence and measurement context.
What does the documented 2.5 m/s figure mean?
It is FD14-50KW rotor start-up only. It is not presented here as verified electrical cut-in or a threshold for the other models.
Does measurable voltage prove useful delivered power?
Identify the actual quantity and output boundary. A voltage indication alone does not establish power accepted by the load or grid.
Is rated kW available whenever the rotor turns?
No such claim follows from rotor motion. Review the applicable electrical performance evidence and its operating conditions.
Does cut-out prove a survival wind speed?
These describe different claims. Structural or environmental limits need their own definitions and applicable evidence.
What should remain unknown until confirmed?
Numerical electrical cut-in, rated-wind and stopping or survival limits that lack evidence for the actual model and configuration.
Technical enquiry
Bring your project information to the discussion.
Wind-speed labels can describe different mechanical and electrical events. Share the available information and the equipment scope you want reviewed in a technical quotation.