Voltage Class
Voltage Class Maximum voltage under normal condition Tolerance Low Voltage (LV) 250 V +- 6% Medium Voltage (MV) 650 V +- 6% High Voltage (HV) 33 KV -9% to +6% Extra High Voltage (EHV) >33 KV 12.5% to 10%
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Insulation Class
The electrical insulation system for wires used in generators, electric motors, transformers, and other wire-wound electrical components is divided into different classes by temperature and temperature rise. The electrical insulation system is sometimes referred to as insulation class or thermal classification. Sl. No. Insulation Class Temperature Materials Used 1. Y 90°C Cotton, Silk, Paper, Wood (without …
