Jännitekesto

Jännitekesto is a Finnish term formed from jännite (voltage or tension) and kesto (durability or endurance). In Finnish technical language it is used as a descriptive concept rather than a fixed standard term, and its precise meaning depends on the field. The word can refer to the ability of a system to withstand electrical or mechanical stress, among other contexts.

In electrical engineering, jännitekesto commonly denotes the dielectric withstand or insulation endurance of a component or system—the capacity to endure applied voltage without electrical breakdown. This concept underpins tests and safety margins, such as high-potential (hipot) tests, impulse tests, and AC withstand assessments that verify insulation integrity under defined voltage levels and durations.

In mechanical engineering and materials science, jännitekesto describes a material’s ability to bear applied mechanical stress over time. It relates to properties such as tensile strength, yield strength, and fatigue life, and concerns performance under static loading or cyclic loading. Assessment methods include tensile tests, fatigue testing, and creep testing to determine how long a part can endure a given load before failure.

The term can also be used more generally to denote stress tolerance or resilience in other contexts, including environmental or operational stressors. Because jännitekesto is not a single standardized specification, the exact criteria are usually defined in product specifications or relevant standards, specifying voltage levels, durations, safety margins, loading regimes, and temperatures.

Overall, jännitekesto serves as a broad descriptor of how well a system resists electrical or mechanical stress under defined conditions, with concrete requirements set per application.