Mittaustehon

Mittaustehon is a Finnish term that translates roughly to "measured power." It refers to the power value obtained from a measurement of a device or system, as distinct from its nominal (rated) or maximum power. The concept is used in engineering, testing, and certification to report the actual output under specified conditions.

In practice, mittaustehon is determined by performing measurements under defined test conditions and with appropriate instrumentation. For electrical equipment, active power (P) is measured with wattmeters, often in three-phase configurations. For mechanical systems, power can be calculated as the product of torque and angular velocity (P = T × ω). In hydraulic systems, power is commonly calculated as the product of pressure difference and flow rate (P = ΔP × Q). The resulting value is typically presented as watts or kilowatts, and may be given for specific load conditions or over a test cycle.

Mittaustehon is usually reported alongside related terms such as nimellisteho (nominal power) and maksimi teho (maximum power) to illustrate how the device performs under test conditions compared to its rated specifications. It is influenced by factors such as load, temperature, supply quality, and measurement setup, and therefore includes measurement uncertainty described by applicable standards.

Significance lies in performance verification, efficiency assessment, and compliance labeling. By comparing mittaustehon with nominal power, engineers can evaluate real-world performance, efficiency losses, and suitability for intended applications.