Understand the interface decision

The resistor temperature depends on energy accumulated over time as well as instantaneous power. A component that survives one event may overheat during repeated operation or sustained energy diversion. The generator and controller strategy determine the relevant duty; a turbine kW label does not.

A rotating wind turbine can retain mechanical input while electrical conditions change. Define the complete control action and energy destination together. A component-level response is only one part of the system-level protective function being assessed.

Put these inputs in the review record

Use a project-specific worksheet to capture the following information. For each entry, name the document, revision and person responsible for resolving any uncertainty.

• Expected power and energy profile for each braking event. Identify the exact configuration and the supporting document.
• Maximum repetition and any sustained dissipation condition. Keep the design assumptions visible in the project record.
• Resistor thermal ratings and enclosure cooling assumptions. Name the responsible reviewer and resolve any missing information.
• Overtemperature detection and the approved response to thermal limits. State how this entry will be verified during acceptance.

Define the acceptance boundary

Require the resistor supplier to confirm the actual duty profile. Preserve the associated controller limits and protection requirements with the selected part. Do not assume a larger resistance or a larger peak-power number provides an equivalent braking function.

The verification plan should include the limiting duty identified by the design. Record initial temperature and event history, because a cool resistor tested once does not demonstrate the repeated-event condition.