Korkeajännitteisiä

Korkeajännitteisiä is a Finnish term used to describe objects, equipment or systems designed to operate at high electrical voltages. In engineering and safety contexts, korkeajännitteisiä refers to devices and installations that handle voltages well above ordinary household levels, requiring special design, insulation and safety measures.

Definitions of what constitutes high voltage vary by country and standard. Commonly, voltages above about 1 kV AC are regarded as high voltage, and above about 1.5 kV DC as well. In European practice, medium voltage typically covers up to tens of kilovolts, while high voltage includes networks in the tens to hundreds of kilovolts, and extra-high voltage covers the highest transmission levels. The exact thresholds depend on applicable regulations and standards.

Design and safety: Korkeajännitteisiä equipment requires robust insulation, sufficient clearance and creepage distances, and materials with high dielectric strength. Components must withstand electrical stress, partial discharge, arcing, and environmental factors. Safe operation relies on proper grounding, shielding, protective enclosures, and interlocks, as well as trained personnel and maintenance.

Common examples include power transformers, high-voltage switchgear, cables and insulators, gas-insulated switchgear, HVDC converters, surge arresters, and laboratory high-voltage testing rigs. They are used in electric power transmission and distribution, industry, research, and rail transport.

Linguistic and regulatory notes: In Finnish, korkeajännitteisiä is the partitive plural form of korkea jännite, used to modify plural nouns. In technical contexts, professional standards are issued by bodies such as the International Electrotechnical Commission (IEC) and national electrical regulations, guiding insulation, clearances, testing, and safety practices.